| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 122006000 | INDUSTRIAL | 56 |
| 20100170453 | STEAM GENERATION PROCESS FOR ENHANCED OIL RECOVERY - The present invention is a system and method for steam production for extraction of heavy bitumen. The method includes mixing fuel and oxidizing gases, combusting the mixture, mixing combustion gas with water containing solids and organics, separating solids, using heat from the separated gas to produce distilled water, recycling the distillation facility brine with the combustion gas and removing solids thereof, generating steam from the distilled water and injecting the steam through an injection well or using it above ground for oil recovery. The system includes a combustion boiler, a direct contact steam generator, a gas-solids separator, and a heat exchanger with a water treatment facility like a distillation facility. The water feed of the present invention can be water separated from produced oil and/or low quality water salvaged from industrial plants, such as refineries and tailings as make-up water. | 07-08-2010 |
| 20110197831 | Pulverized Coal Burning Boiler - A pulverized coal burning boiler is provided, which reduces an air-excess ratio thereby to reduce the emission of unburned contents such as CO. The pulverized coal burning boiler includes a pulverized coal feed measuring device for measuring the feeding rates of the pulverized coal to be conveyed through coal feeding pipes, individually, and a control device for calculating the burning air feeding rates to match the pulverized coal feeding rates thereby to send a control command signal to burning air feed adjusting device, so that a burner air ratio set by a burner air ratio setting device may be kept on the basis of both the pulverized coal feeding rate, which is measured by the pulverized coal feed measuring device, and the burning air feeding rate, which is measured by the burning air feeding rate measuring device and fed to a pulverized coal burner connected to the coal feeding pipes. | 08-18-2011 |
| 20120137990 | Systems and Methods for Liquid Vaporizers and Operations Thereof - A vaporizer including injection lances disposed within a vessel for injecting a substance such as liquid or heating media, into the vessel. The lances are configured for removal from the vessel through at least one of multiple orifices in the wall of the vessel. The orifices are configured to have lances extending through them into the vessel. The configuration of the vaporizer facilitates performing maintenance or making changes to the lances without the need to take the vaporizer out of service. | 06-07-2012 |
| 20120266826 | SYSTEM, METHOD AND APPARATUS FOR THERMALLY CONDUCTIVE REFRACTORY TILES FOR WASTE TO ENERGY BOILER WALLS - A refractory tile has a body formed from a refractory material. The body has a front side that defines a front plane, and a rear side that defines a rear plane that is opposite the front plane. A concave portion is formed in the rear side and is contoured to a wall of boiler tubes. The body also has an inclined portion extending from the front plane to the rear plane. The inclined portion is formed at an acute angle with respect to the rear plane. The inclined portion defines an edge at an intersection with the rear plane. The edge directly contacts the wall without a backfill material. The tiles form an array of upper refractory tiles located only on an uppermost row of the array above lower refractory, against the bare wall of boiler tubes. | 10-25-2012 |
| 20130269630 | STEAM GENERATOR FILM COOLING USING PRODUCED WATER - An exemplary steam generator assembly includes a wall. Produced water acts as film cooling to at least a portion of the wall. | 10-17-2013 |
| 122600500 | Port | 1 |
| 20090272339 | COOLING SYSTEM FOR PORTS IN A BOILER - A cooling system for air ports and other ports in furnace walls includes a cooling medium pumping system and ports provided with a cooling medium piping or channels inside the metallic port material. The liquid flow generated by the cooling medium system cools the ports. The ports are constructed of a casting material, and the ports are provided with a cooling liquid flow, which passes in a piping or pipings or channels inside the casting material of the ports. | 11-05-2009 |
| 122600600 | Tuyeres | 1 |
| 20110253066 | W-STAGED FLAME BOILER FOR MULTI-STAGE COMBUSTION WITH MULTI-EJECTION AND ITS METHOD THEREOF - A method for a flame boiler with multi-stage combustion with multi-ejection, includes the steps of ejecting inner and outer secondary air flows with speed of 35-65 m/s to guide a fuel-rich pulverized coal flow with speed of 10-20 m/s into a lower chamber to provide first and second combustion stages, ejecting lower secondary air flows with speed of 35-65 m/s into the lower chamber to further guide the pulverized coal so as to provide a third combustion stage. The system includes a lower chamber, an upper chamber, a combustion chamber, fuel-rich pulverized coal flow nozzles, fuel-lean pulverized coal flow nozzles respectively provided at the front and rear boiler arches, and lower secondary air nozzles provided at the front and rear water cooled walls. The combustion of the pulverized coal flow with W-shaped flowing path within the boiler is adapted to reduce NO | 10-20-2011 |
| 122007000 | Waste heat | 47 |
| 20080236516 | WATER RECIRCULATION SYSTEM FOR BOILER BACKEND GAS TEMPERATURE CONTROL - A water recirculation system for a steam power plant includes a tapoff line which receives water from a downcomer, and an economizer link which receives water from the tapoff line and transports the water to an economizer. | 10-02-2008 |
| 20080289589 | APPARATUS FOR STEAM HEAT RECOVERY FROM MULTIPLE HEAT STREAMS - Disclosed is an apparatus and process for recovering heat from multiple hot process streams without multiplying instrumentation. Each hot process stream is indirectly heat exchanged with a water circuit which leaves and feeds a steam drum. Heat is added to the steam drum through the addition of water heated outside of the steam drum. The heated liquid and vapor water is heated in heat exchangers decoupled from the steam drum. The water circuits are arranged in parallel with each other and feed a single steam drum to provide a steam product of a desired pressure for which only one set of instrumentation is needed. | 11-27-2008 |
| 20090044767 | BOILER ARRANGEMENT - In a boiler, a space is reserved to expand the boiler by increasing the front and rear walls. To expand the boiler, wall additions are added to increase the width of the front and rear walls. After the expansion, the distance between the front and rear walls is substantially the same distance between the front and rear walls before the expansion. | 02-19-2009 |
| 20090050079 | Economizer for a steam generator - An economizer for a heat recovery steam generator utilized to improve the efficiency of the Rankine cycle by preheating the water that flows to the evaporator section. The economizer multi-pass sections include up-flow tubes only. This arrangement greatly reduces thermal stresses on the tubes by ensuring that each individual tube in any fluid-flow pass operates at the same or similar temperature. The design of the invention does this by causing all tubes in any fluid-flow pass to have the same upwards fluid flow direction and similar fluid flow velocity. No unstable backflow (i.e. flow in the reverse direction) occurs in any of the tubes. Heated down-flow tube sections are totally eliminated in this design. Respective jumper pipes are provided to conduct the water from the top of an economizer panel to the bottom of an adjacent panel. | 02-26-2009 |
| 20090071419 | Steam Generator - The invention relates to a steam generator wherein a continuous heating panel of a generator, which is formed from a number of evaporator tubes, and an overheating panel, which is formed from a number of over-heating tubes which are arranged downstream from the evaporator tubes and on the flow side, are arranged in a heating gas channel. According to the invention, a water separating element is integrated into a number of over-flow tubes which are connected on the flow side of one of several evaporator tubes to one or several overheating tubes. | 03-19-2009 |
| 20090241860 | ENHANCED STEAM CYCLE UTILIZING A DUAL PRESSURE RECOVERY BOILER WITH REHEAT - An enhanced steam cycle utilizing a dual pressure recovery boiler with reheat allows a large increase in electrical generation with various turbine cycles while overcoming traditional lower furnace material limitations. A dual pressure designed recovery boiler furnace is provided with a lower furnace and an upper furnace. The lower furnace is operated at a lower temperature to prevent or reduce corrosion of the lower furnace wall tubes caused by the reducing environment. The lower furnace can be either a low pressure natural circulation steam generating (drum) system or economizer. Unlike the lower furnace, the upper furnace is not exposed to a reducing environment and is therefore not as susceptible to severe corrosion rates. The upper furnace is operated at higher temperatures and pressures which permit implementation of higher efficiency reheat steam cycles. The upper furnace thus operates as a high pressure natural circulation steam generating (drum) system, or as a once-through supercritical steam generating system. The dual pressure recovery boiler can thus be coupled to a variety of condensing, non-condensing or a combination of condensing and non-condensing turbine cycles to provide a large increase in electrical generation. | 10-01-2009 |
| 20090260585 | Oxyfuel Combusting Boiler System and a Method of Generating Power By Using the Boiler System - Carbonaceous fuel is combusted with an oxidant gas in a furnace of a boiler system to generate power. Oxidant gas is fed into the furnace for combusting the fuel to produce exhaust gas, the exhaust gas is discharged from the furnace via an exhaust gas channel, a stream of feedwater is conveyed from a final economizer arranged in the exhaust gas channel to evaporating and superheating heat exchange surfaces arranged in the furnace and in the exhaust gas channel for converting the feedwater to superheated steam, the superheated steam is converted in a high-pressure steam turbine for generating power, a first portion of steam is extracted from the high-pressure steam turbine for preheating the feedwater, a second portion of steam is conveyed from the high-pressure steam turbine to reheating heat exchange surfaces arranged in the exhaust gas channel for generating reheated steam, and the reheated steam is expanded in an intermediate pressure steam turbine for generating power. The oxidant gas can be a mixture of substantially pure oxygen and recycled exhaust gas, and the ratio of the first and second portions of steam can be controlled to obtain a desired flue gas temperature in the exhaust gas channel downstream of the final economizer. | 10-22-2009 |
| 20100012051 | Compact, Tiered Sulfur Recovery Unit - A compact, tiered sulfur recovery unit having a burner, a combustion chamber, a reaction chamber, a waste heat boiler and a steam drum. The waste heat boiler is mounted above the reaction chamber, and the steam drum is mounted above the waste heat boiler, resulting in a three-tiered, compact design, requiring only a single platform for space. The reaction chamber comprises a horizontal body and an upright plenum. The reaction chamber includes an inlet for receipt of acid gas (H | 01-21-2010 |
| 20100126434 | INTEGRATED LIME KILM PROCESS - A process and system for recovering waste heat from a kiln used for lime or cement production. The system unifies the kiln, a waste heat recovery and power generation circuit and a dry scrubber for scrubbing the pollutants from the kiln offgas. Essentially, the system employs the boiler component of the waste heat recovery and power generation circuit as a heat exchanger to recover the waste heat from the kiln, which is used to drive the steam turbines. The heat absorption from the latter stage lowers the temperature of the kiln offgas sufficiently for optimum performance from the scrubber. The presence of lime particles in the offgas effectively protects the boiler tube surfaces from corrosion which would occur at optimum scrubber temperatures, and subsequently provides the lime required as a scrubbing medium for the dry scrubber. Further, the efficient scrubbing allows for the use of any fuel for firing the kiln inclusive of high sulphur content compounds. A process for effecting the technology is also provided. | 05-27-2010 |
| 20100139581 | VESSEL FOR COOLING SYNGAS - A vessel for cooling syngas comprising | 06-10-2010 |
| 20100192877 | Sustainable Waste Heat Management System - A self-contained waste heat recovery system for a commercial oven provides circulating an energy source to an oven heating system. The oven heating system recovers heat from an oven stack or downstream of oxidizer if used and distributes the heat to bakery systems such as proofers, tray washers, process water heating and other points of use. The system features secondary loops to ensure constant flow of the energy source throughout the system optimizing energy savings. | 08-05-2010 |
| 20110041783 | Steam Generator - A steam generator of a technical plant, in particular a power plant, comprising a heating gas passage enclosed by a gas-tight enclosing wall, wherein the heating gas passage has a number of heating surfaces through which a flow medium can flow, is to ensure especially reliable cleaning of the heating gas flowing off from the heating gas passage at an especially low design and production cost. To this end, provision is made according to the invention for at least one of the heating surfaces to be at least partly provided with a catalytic coating on its side facing the heating gas. | 02-24-2011 |
| 20110048344 | WATER HEATING APPARATUS - A water heating apparatus includes: an exhaust gas passage through which an exhaust gas from a burner flows; a water flow passage through which water flows; a first heat exchanger configured to exchange heat between sensible heat contained in the exhaust gas and water flowing through a heat exchanger tube, and arranged at upstream side of the exhaust gas passage and downstream side of the water flow passage; a second heat exchanger configured to exchange heat between latent heat contained in the exhaust gas and water flowing through a heat exchanger tube, and arranged at downstream side of the exhaust gas passage and upstream side of the water flow passage; and a bypass pipe arranged in the water flow passage in such a position as to bypass the second heat exchanger and designed to allow a at least the predetermined minimum amount of water required for a burner combustion operation to flow therethrough into the first heat exchanger. | 03-03-2011 |
| 20110083620 | Waste Heat Recovery System and Method Thereof - A waste heat recovery system comprises a steam generator, a processor, a first heat exchanger, and a second heat exchanger. The steam generator generates an original steam using water. The first heat exchanger condensates the first steam and emit water and a second steam from the processor. The second heat exchanger condensates the second steam from the first heat exchanger. The second heat exchanger condensates the second steam from the first heat exchanger leaving water only. The water from the first heat exchanger and the second heat exchanger may be guided into the steam generator or into the first heat exchanger. The second heat exchanger comprises one or more pressure relief valve. The pressure relief valve operates when inner pressure of the second heat exchanger exceeds above a predetermined value. | 04-14-2011 |
| 20110162594 | Waste Heat Steam Generator - A waste heat steam generator including evaporator tubes is provided. The evaporator tubes are connected in parallel on the flow medium side, a plurality of overheating tubes are mounted downstream of the evaporator tubes using a water separation system. The water separation system includes water separation elements, each water separation element being respectively mounted downstream of the plurality of evaporator tubes and/or upstream of a plurality of overheating tubes. Each water separating element includes an inlet pipe which is respectively connected upstream to the evaporator tubes, the inlet pipe extending into a water evacuation pipe when seen in the longitudinal direction. A plurality of outflow pipes branch off in the transitional area, the pipes being connected to an inlet collector of the overheating tubes which are respectively connected downstream. A distribution element is arranged on the steam side between the respective water separating element and the inlet collector. | 07-07-2011 |
| 20110203536 | Continuous steam generator - A continuous steam generator is provided. The continuous steam generator includes a combustion chamber having a number of burners for fossil fuels, downstream of which a vertical gas duct is mounted, on the hot gas side, in an upper region above a horizontal gas duct. The outside wall of the combustion chamber is formed, in a lower region, from evaporation tubes welded together in a gas-tight manner and mounted upstream of a water separator system, on the flow medium side, and in an upper region, from superheater tubes welded together in a gastight manner and mounted downstream of the water separator system on the flow medium side. The boundary between the regions of the evaporation tubes and the superheater tubes is essentially horizontal around the combustion chamber, in a region of the bottom of the horizontal gas duct. | 08-25-2011 |
| 20110214624 | METHOD AND DEVICE FOR PRODUCING A GASEOUS MEDIUM COMPRISING STEAM - The invention relates to a method for producing a gaseous medium comprising steam, said steam being produced from a first fluid medium separated from the exhaust gas from combustion of a fuel in a steam generating step, said fuel being provided for burning for providing energy for heating said first fluid medium, comprising the steps of mixing the steam thus produced with exhaust gas from combustion of said fuel; and supplying at least one chemical substance different from air and water to said steam and exhaust gas mixture. The invention also relates to a device for producing a gaseous medium comprising steam. | 09-08-2011 |
| 20110239961 | ONCE-THROUGH VERTICAL EVAPORATORS FOR WIDE RANGE OF OPERATING TEMPERATURES - An evaporator for steam generation is presented. The evaporator includes a plurality of primary evaporator stages and a secondary evaporator stage. Each primary stage includes one or more primary arrays of heat transfer tubes, an outlet manifold coupled to the arrays, and a downcomer coupled to the manifold. Each of the primary arrays has an inlet for receiving a fluid and is arranged transverse to a flow of gas through the evaporator. The gas heats the fluid flowing through the arrays to form a two phase flow. The outlet manifold receives the two phase flow from the arrays and the downcomer distributes the flow as a component of a primary stage flow. One or more of the plurality of primary evaporator stages selectively form the primary stage flow from respective components of the two phase flow, and provide the primary stage flow to inlets of the secondary evaporator stage. | 10-06-2011 |
| 20110315094 | Continuous Evaporator - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium can flow from bottom to top, and a second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium can flow from bottom to top. The second steam generator tubes are designed in such a manner that the average mass flow density which can be controlled in the full load operation does not fall below a predetermined minimum mass flow density in the second steam generator tubes. | 12-29-2011 |
| 20110315095 | CONTINUOUS EVAPORATOR - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium can flow from bottom to top, and a second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium can flow from bottom to top. The first steam generator tubes are designed in such a manner that the average mass flow density which may be controlled in the full load operation does not fall below the predetermined minimum mass flow density in the first steam generator tubes. | 12-29-2011 |
| 20120017853 | WASTE HEAT BOILER - Waste heat boiler ( | 01-26-2012 |
| 20120024241 | Continuous evaporator - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium may flow from bottom to top, and another second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium may flow from bottom to top. An aperature system is arranged downstream of the second steam generator tubes on the flow medium side. | 02-02-2012 |
| 20120073520 | CONTINUOUS EVAPORATOR - A continuous evaporator for a horizontal waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface that has a number of essentially vertically arranged first steam generating tubes wherein the circulation takes place from the bottom to the top, and another second evaporator heating surface located downstream of the first evaporator heating surface on the side of the flow medium, the second evaporator heating surface including a number of other essentially vertically arranged second steam generating tubes wherein the circulation takes place from the bottom to the top is provided. In order to provide a continuous evaporator with an especially simple structure and an especially long service life, a number of second steam generator tubes have an inner profiled element. | 03-29-2012 |
| 20120180739 | CASCADING ONCE THROUGH EVAPORATOR - A steam generator includes a substantially horizontal gas conduit ( | 07-19-2012 |
| 20120204817 | CONFIGURATIONS AND METHODS OF GENERATING LOW-PRESSURE STEAM - Low-pressure steam for a steam consuming device, and particularly a steam reboiler, is generated at the steam consumption pressure to maximize the heat recovery from a utility fuel and/or waste heat source. Most preferably, steam is generated at the lowest possible pressure by fluidly coupling the steam generator to the steam consuming device (e.g., by integrating the condensate drum with the steam drum). Therefore, it should be appreciated that the steam generator pressure in such configurations and methods will ride on the reboiler pressure. | 08-16-2012 |
| 20120234263 | PROCESSES AND SYSTEMS FOR GENERATING STEAM FROM MULTIPLE HOT PROCESS STREAMS - Embodiments of processes and an apparatus for generating steam are provided. The process comprises the steps of indirectly heating water in a first thermosyphon heat exchanger with a first hot stream to form a first stream of heated water comprising steam. The first stream of heated water is fluidly communicated to a first steam drum via natural circulation. Water is indirectly heated in a second thermosyphon heat exchanger with a second hot stream from the process unit to form a second stream of heated water comprising steam. The second stream of heated water is fluidly communicated to the first steam drum via natural circulation. Steam is recovered from the first steam drum. | 09-20-2012 |
| 20120240871 | METHOD AND CONFIGURATION TO REDUCE FATIGUE IN STEAM DRUMS - A heat recovery steam generator that includes a first steam drum for receiving a flow of water and steam from an evaporator. The first steam drum is adapted to provide the flow of water and steam to a second steam drum. The second steam drum is in fluid communication with the first steam drum and receives the flow of water and steam from the first steam drum and separates steam from the flow of water and steam to form a separated steam. There is a steam flow outlet positioned in the second steam drum, the steam flow outlet adapted to release the separated steam from the second steam drum. | 09-27-2012 |
| 20120247406 | METHOD OF CONTROLLING DRUM TEMPERATURE TRANSIENTS - An evaporator system comprises an evaporator; a drum; and a pump that are in fluid communication with each other. The pump is operative to create a temporary pressure gradient during start-up of an evaporator system and transport a fluid from the evaporator to the drum prior to the fluid reaching its boiling point in the evaporator. Following the fluid reaching its boiling point in the evaporator, the fluid naturally circulates in the evaporator system. | 10-04-2012 |
| 20130047938 | METHOD FOR OPERATING A STEAM GENERATOR - A method for operating a steam generator comprising a combustion chamber having a plurality of evaporator heating surfaces which are connected in parallel on the flow medium side is provided. An object is to provide a steam generator which has a particularly long service life and which is particularly reliable. For this purpose, a flow medium is introduced into an inlet of a first evaporator heating surface at a temperature which is lower than the temperature of the flow medium introduced into the inlet of a second evaporator heating surface. | 02-28-2013 |
| 20130125842 | METHODS AND SYSTEMS FOR HEATING AND MANIPULATING FLUIDS - Systems and methods are provided for heating and manipulating a fluid to heat the fluid, evaporate water from the fluid, concentrate the fluid, separate the fluid into fractions; and/or pasteurize the fluid, comprising a closed-loop heating subsystem coupled to a primary fluid-to-fluid heat exchanger, and one or more fluid manipulation subsystems also coupled to the primary fluid-to-fluid heat exchanger. | 05-23-2013 |
| 20130180475 | WASTE HEAT BOILER - A waste heat boiler has heat exchange tubes for indirect heat exchange of a relatively hot process gas and a cooling media, and a by-pass tube for by-passing a part of the process gas; a process gas collector collects and mixes a part of the heat exchanged process gas and at least a part of the by-passed process gas before the mix is lead via a control valve to the process gas outlet of the waste heat boiler together with the rest of the heat exchanged process gas. | 07-18-2013 |
| 20130291808 | METHOD FOR UTILIZING THERMAL ENERGY OF PRODUCT GASES IN A BTL PLANT - The invention for utilizing thermal energy of gases generated in a BtL plant. A feature of the invention is that the thermal energy of discharge gas streams generated in the BtL plant is used for driving various compressor machineries and/or electricity generation, whereby the plant can operate as a stand-alone facility. | 11-07-2013 |
| 20130291809 | DOMESTIC COMBINED HEAT AND POWER SYSTEM - The present invention relates to a domestic combined heat and power system, and the domestic combined heat and power system includes a power unit, a heat-storage tank which receives waste heat of the power unit and stores heat in direct water, and a main heat exchanger which is connected to the heat-storage tank and is heated by a burner so as to use the water as hot water or heating water, in which a waste-heat heat exchanger filled with a heat-transfer medium is installed between the power unit and the heat-storage tank such that a waste-heat pipe of the power unit is arranged in the form of a coil at one side inside the waste-heat heat exchanger, and a heat-storage pipe of the heat-storage tank is arranged in the form of a coil at the other side, so that waste heat of the power unit is indirectly heat exchanged to the heat-storage tank through the heat-transfer medium; in which hot-water piping coming out from the heat-storage tank is arranged so as to be indirectly heat exchanged via a hot-water heat exchanger, and heating piping coming out from the heat-storage tank is connected to the heating water-heat exchanger, and a part of the heating piping again comes out and is arranged so as to be indirectly heat exchanged via the hot-water heat exchanger. According to the present invention, since a heat-exchange method for the power unit and the heat-storage tank is changed into an indirect heat-exchange method, costs and waste of energy consumption are reduced, and there is sharing of functions that are duplicated across the heat-storage tank and a boiler such that efficient system design is possible, variability and compatibility are enhanced, and the system volume is reduced such that installation space may be more effectively used. | 11-07-2013 |
| 20140000535 | METALLURGICAL PLANT WITH EFFICIENT WASTE-HEAT UTILIZATION | 01-02-2014 |
| 20140116361 | Systems and Methods for Heat Recovery Steam Generation at Dual Pressures - Systems for the recovery of heat from hot air exhaust from industrial processes, and the utilization of recovered heat to generate steam at two discrete (high and low) pressures. The systems match steam production with demand. The systems utilize efficient finned tube exchange units made up of modular sections that can be selectively associated with either high or low pressure steam generators. The systems utilize separate steam domes for each of the discrete steam pressures. The steam dome components may be structured apart from the heat exchange components. Each steam dome utilizes its own sensor and control instrumentation to vary the allocation of heat recovered to either or both the high or low pressure steam generator. The two generator subsystems are linked to operate variably according to demand. Monitoring upstream heat and downstream steam requirements allow for automated operation and allocation of recovered heat into the two subsystems. | 05-01-2014 |
| 20140216365 | SYSTEM AND METHOD FOR HEAT RECOVERY STEAM GENERATORS - A system includes a heat recovery steam generator (HRSG) including a plurality of evaporator sections. At least one evaporator section includes a natural circulation evaporator configured to generate a saturated steam, a once-through evaporator configured to generate a first superheated steam, a first superheater configured to receive the saturated steam from the natural circulation evaporator, and a second superheater configured to receive the first superheated steam from the once-through evaporator. | 08-07-2014 |
| 20140305386 | COGENERATION SYSTEM AND METHOD FOR CONTROLLING SAME - The cogeneration system includes: a cogeneration apparatus which generates electric power using supplied fuel gas and supplies the electric power and heat; a heat accumulator which accumulates the heat supplied by the cogeneration apparatus; a controller which controls at least start and stop of the cogeneration apparatus; and a display unit that displays a remaining power generation duration which is a length of time for which the cogeneration apparatus can continue power generation. The controller further calculates the remaining power generation duration based on a remaining heat accumulation capacity which is a difference between (a) a maximum accumulable heat amount which is the amount of heat the heat accumulator is capable of accumulating and (b) a current accumulated heat amount that is the amount of heat currently accumulated in the heat accumulator, and causes the display unit to display the calculated remaining power generation duration. | 10-16-2014 |
| 20150075450 | HEAT RECOVERY FROM A HIGH PRESSURE STREAM - A process for recovering heat from a high pressure stream during hydroprocessing, where one embodiment of the process includes serially introducing a high pressure stream from a hot separator into a first steam generator and a second steam generator; using the first steam generator to generate a medium pressure stream of steam, and then using the medium pressure stream as stripping steam. The process also includes using the second steam generator to generate a low pressure stream of steam, and then using the low pressure stream as stripping steam. | 03-19-2015 |
| 20150090202 | SYSTEM AND METHOD FOR DRUM LEVEL CONTROL IN A DRUM OF A HEAT RECOVERY STEAM GENERATOR - A system includes the HRSG having an economizer disposed along a fluid flow path, and a drum disposed along the fluid flow path downstream of the economizer. The HRSG also includes a drum level control module configured to modulate an amount of the fluid provided to the drum along the fluid flow path and a supplemental control module configured to control an amount of the fluid in a different manner than the drum level control module. The heat recovery steam generator also includes a drum level event controller configured to monitor a rate of change of a level of the fluid in the drum. If the rate of change is over a threshold value, a signal goes to the supplemental control. If the rate of change is less than or equal to the threshold value, the signal goes to the drum level control module. | 04-02-2015 |
| 20150107537 | RECOVERY SYSTEM OF WASTE HEAT FROM FLUE GAS - A recovery system of waste heat from flue gas. The system includes a first heat exchanger and a second exchanger. The first heat exchanger includes a heat absorption section, a heat release section, and a first pipeline. The second heat exchanger includes a second pipeline including an inlet header and an outlet header. The system further includes a third pipeline. The first heat exchanger is disposed at a relatively high temperature side of a flue, the second heat exchanger is disposed at a relatively low temperature side of the flue, and the first heat exchanger and the second heat exchanger are connected by the third pipeline. The heat absorption section and the heat release section are connected by the first pipeline to form a circulation loop; the heat absorption section is disposed in the flue; the heat release section is disposed in the third pipeline. | 04-23-2015 |
| 20150362173 | Multi-Stage Duct Fired Heat Recovery Steam Generator and Methods of Use - A high efficiency multi-stage duct fired heat recovery steam generator (HRSG) is provided to generate steam for use in thermal enhanced oil recovery (EOR) applications. The HRSG is equipped with a plurality of duct burners in series and a plurality of evaporators for transferring heat from the duct burners to the water to generate steam, with at least one evaporator corresponding to each of the duct burners. Each evaporator is arranged downstream from the corresponding duct burner. Hot exhaust gas from a gas turbine (over 1000° F.) is directed to the duct burners in series, allowing further combustion and maximizing thermal efficiency for the HRSG to have a thermal efficiency of at least 92%, and for the exhaust gas exiting the HRSG to a reduced oxygen level of less than 5%. | 12-17-2015 |
| 20160161106 | A SHELL-AND-TUBE APPARATUS FOR HEAT RECOVERY FROM A HOT PROCESS STREAM - A shell-and-tube apparatus ( | 06-09-2016 |
| 20180023806 | WASTE HEAT BOILER | 01-25-2018 |
| 20130269631 | Steam Delivery System for Biomass Processing - The present invention relates to delivery of steam produced by an electrical power generation plant to a lignocellulosic biomass refinery. | 10-17-2013 |
| 20140202400 | WATER COOLED CO BOILER FLOOR WITH SCREEN GAS DISTRIBUTION INLET - A carbon monoxide (CO) boiler or steam generator having a water cooled CO boiler floor with screen gas distribution inlet to enhance distribution of CO gas in a CO boiler. Either the front or rear wall tubes of the steam generator form an integral screen and the tubes continue, forming a membraned, gas tight enclosure. The floor has a “knee” to redirect the incoming waste CO gas up into the integral screen. The screen may be provided with tube erosion shields to prevent erosion of the screen tubes and to control the distribution of waste gas across the plan area of the furnace. | 07-24-2014 |
| 20150136046 | METHOD FOR USING THE EXHAUST GASES FROM PLANTS FOR RAW IRON MANUFACTURE FOR GENERATING STEAM - A method and a system for generating steam using the waste gases from plants for pig iron manufacture: waste gas removed as export gas ( | 05-21-2015 |
| 20160010852 | ENERGY RECOVERY FOR WASTE GAS CAPTURE SYSTEMS | 01-14-2016 |
| 122007000 | Steel converter | 1 |
| 20080236516 | WATER RECIRCULATION SYSTEM FOR BOILER BACKEND GAS TEMPERATURE CONTROL - A water recirculation system for a steam power plant includes a tapoff line which receives water from a downcomer, and an economizer link which receives water from the tapoff line and transports the water to an economizer. | 10-02-2008 |
| 20080289589 | APPARATUS FOR STEAM HEAT RECOVERY FROM MULTIPLE HEAT STREAMS - Disclosed is an apparatus and process for recovering heat from multiple hot process streams without multiplying instrumentation. Each hot process stream is indirectly heat exchanged with a water circuit which leaves and feeds a steam drum. Heat is added to the steam drum through the addition of water heated outside of the steam drum. The heated liquid and vapor water is heated in heat exchangers decoupled from the steam drum. The water circuits are arranged in parallel with each other and feed a single steam drum to provide a steam product of a desired pressure for which only one set of instrumentation is needed. | 11-27-2008 |
| 20090044767 | BOILER ARRANGEMENT - In a boiler, a space is reserved to expand the boiler by increasing the front and rear walls. To expand the boiler, wall additions are added to increase the width of the front and rear walls. After the expansion, the distance between the front and rear walls is substantially the same distance between the front and rear walls before the expansion. | 02-19-2009 |
| 20090050079 | Economizer for a steam generator - An economizer for a heat recovery steam generator utilized to improve the efficiency of the Rankine cycle by preheating the water that flows to the evaporator section. The economizer multi-pass sections include up-flow tubes only. This arrangement greatly reduces thermal stresses on the tubes by ensuring that each individual tube in any fluid-flow pass operates at the same or similar temperature. The design of the invention does this by causing all tubes in any fluid-flow pass to have the same upwards fluid flow direction and similar fluid flow velocity. No unstable backflow (i.e. flow in the reverse direction) occurs in any of the tubes. Heated down-flow tube sections are totally eliminated in this design. Respective jumper pipes are provided to conduct the water from the top of an economizer panel to the bottom of an adjacent panel. | 02-26-2009 |
| 20090071419 | Steam Generator - The invention relates to a steam generator wherein a continuous heating panel of a generator, which is formed from a number of evaporator tubes, and an overheating panel, which is formed from a number of over-heating tubes which are arranged downstream from the evaporator tubes and on the flow side, are arranged in a heating gas channel. According to the invention, a water separating element is integrated into a number of over-flow tubes which are connected on the flow side of one of several evaporator tubes to one or several overheating tubes. | 03-19-2009 |
| 20090241860 | ENHANCED STEAM CYCLE UTILIZING A DUAL PRESSURE RECOVERY BOILER WITH REHEAT - An enhanced steam cycle utilizing a dual pressure recovery boiler with reheat allows a large increase in electrical generation with various turbine cycles while overcoming traditional lower furnace material limitations. A dual pressure designed recovery boiler furnace is provided with a lower furnace and an upper furnace. The lower furnace is operated at a lower temperature to prevent or reduce corrosion of the lower furnace wall tubes caused by the reducing environment. The lower furnace can be either a low pressure natural circulation steam generating (drum) system or economizer. Unlike the lower furnace, the upper furnace is not exposed to a reducing environment and is therefore not as susceptible to severe corrosion rates. The upper furnace is operated at higher temperatures and pressures which permit implementation of higher efficiency reheat steam cycles. The upper furnace thus operates as a high pressure natural circulation steam generating (drum) system, or as a once-through supercritical steam generating system. The dual pressure recovery boiler can thus be coupled to a variety of condensing, non-condensing or a combination of condensing and non-condensing turbine cycles to provide a large increase in electrical generation. | 10-01-2009 |
| 20090260585 | Oxyfuel Combusting Boiler System and a Method of Generating Power By Using the Boiler System - Carbonaceous fuel is combusted with an oxidant gas in a furnace of a boiler system to generate power. Oxidant gas is fed into the furnace for combusting the fuel to produce exhaust gas, the exhaust gas is discharged from the furnace via an exhaust gas channel, a stream of feedwater is conveyed from a final economizer arranged in the exhaust gas channel to evaporating and superheating heat exchange surfaces arranged in the furnace and in the exhaust gas channel for converting the feedwater to superheated steam, the superheated steam is converted in a high-pressure steam turbine for generating power, a first portion of steam is extracted from the high-pressure steam turbine for preheating the feedwater, a second portion of steam is conveyed from the high-pressure steam turbine to reheating heat exchange surfaces arranged in the exhaust gas channel for generating reheated steam, and the reheated steam is expanded in an intermediate pressure steam turbine for generating power. The oxidant gas can be a mixture of substantially pure oxygen and recycled exhaust gas, and the ratio of the first and second portions of steam can be controlled to obtain a desired flue gas temperature in the exhaust gas channel downstream of the final economizer. | 10-22-2009 |
| 20100012051 | Compact, Tiered Sulfur Recovery Unit - A compact, tiered sulfur recovery unit having a burner, a combustion chamber, a reaction chamber, a waste heat boiler and a steam drum. The waste heat boiler is mounted above the reaction chamber, and the steam drum is mounted above the waste heat boiler, resulting in a three-tiered, compact design, requiring only a single platform for space. The reaction chamber comprises a horizontal body and an upright plenum. The reaction chamber includes an inlet for receipt of acid gas (H | 01-21-2010 |
| 20100126434 | INTEGRATED LIME KILM PROCESS - A process and system for recovering waste heat from a kiln used for lime or cement production. The system unifies the kiln, a waste heat recovery and power generation circuit and a dry scrubber for scrubbing the pollutants from the kiln offgas. Essentially, the system employs the boiler component of the waste heat recovery and power generation circuit as a heat exchanger to recover the waste heat from the kiln, which is used to drive the steam turbines. The heat absorption from the latter stage lowers the temperature of the kiln offgas sufficiently for optimum performance from the scrubber. The presence of lime particles in the offgas effectively protects the boiler tube surfaces from corrosion which would occur at optimum scrubber temperatures, and subsequently provides the lime required as a scrubbing medium for the dry scrubber. Further, the efficient scrubbing allows for the use of any fuel for firing the kiln inclusive of high sulphur content compounds. A process for effecting the technology is also provided. | 05-27-2010 |
| 20100139581 | VESSEL FOR COOLING SYNGAS - A vessel for cooling syngas comprising | 06-10-2010 |
| 20100192877 | Sustainable Waste Heat Management System - A self-contained waste heat recovery system for a commercial oven provides circulating an energy source to an oven heating system. The oven heating system recovers heat from an oven stack or downstream of oxidizer if used and distributes the heat to bakery systems such as proofers, tray washers, process water heating and other points of use. The system features secondary loops to ensure constant flow of the energy source throughout the system optimizing energy savings. | 08-05-2010 |
| 20110041783 | Steam Generator - A steam generator of a technical plant, in particular a power plant, comprising a heating gas passage enclosed by a gas-tight enclosing wall, wherein the heating gas passage has a number of heating surfaces through which a flow medium can flow, is to ensure especially reliable cleaning of the heating gas flowing off from the heating gas passage at an especially low design and production cost. To this end, provision is made according to the invention for at least one of the heating surfaces to be at least partly provided with a catalytic coating on its side facing the heating gas. | 02-24-2011 |
| 20110048344 | WATER HEATING APPARATUS - A water heating apparatus includes: an exhaust gas passage through which an exhaust gas from a burner flows; a water flow passage through which water flows; a first heat exchanger configured to exchange heat between sensible heat contained in the exhaust gas and water flowing through a heat exchanger tube, and arranged at upstream side of the exhaust gas passage and downstream side of the water flow passage; a second heat exchanger configured to exchange heat between latent heat contained in the exhaust gas and water flowing through a heat exchanger tube, and arranged at downstream side of the exhaust gas passage and upstream side of the water flow passage; and a bypass pipe arranged in the water flow passage in such a position as to bypass the second heat exchanger and designed to allow a at least the predetermined minimum amount of water required for a burner combustion operation to flow therethrough into the first heat exchanger. | 03-03-2011 |
| 20110083620 | Waste Heat Recovery System and Method Thereof - A waste heat recovery system comprises a steam generator, a processor, a first heat exchanger, and a second heat exchanger. The steam generator generates an original steam using water. The first heat exchanger condensates the first steam and emit water and a second steam from the processor. The second heat exchanger condensates the second steam from the first heat exchanger. The second heat exchanger condensates the second steam from the first heat exchanger leaving water only. The water from the first heat exchanger and the second heat exchanger may be guided into the steam generator or into the first heat exchanger. The second heat exchanger comprises one or more pressure relief valve. The pressure relief valve operates when inner pressure of the second heat exchanger exceeds above a predetermined value. | 04-14-2011 |
| 20110162594 | Waste Heat Steam Generator - A waste heat steam generator including evaporator tubes is provided. The evaporator tubes are connected in parallel on the flow medium side, a plurality of overheating tubes are mounted downstream of the evaporator tubes using a water separation system. The water separation system includes water separation elements, each water separation element being respectively mounted downstream of the plurality of evaporator tubes and/or upstream of a plurality of overheating tubes. Each water separating element includes an inlet pipe which is respectively connected upstream to the evaporator tubes, the inlet pipe extending into a water evacuation pipe when seen in the longitudinal direction. A plurality of outflow pipes branch off in the transitional area, the pipes being connected to an inlet collector of the overheating tubes which are respectively connected downstream. A distribution element is arranged on the steam side between the respective water separating element and the inlet collector. | 07-07-2011 |
| 20110203536 | Continuous steam generator - A continuous steam generator is provided. The continuous steam generator includes a combustion chamber having a number of burners for fossil fuels, downstream of which a vertical gas duct is mounted, on the hot gas side, in an upper region above a horizontal gas duct. The outside wall of the combustion chamber is formed, in a lower region, from evaporation tubes welded together in a gas-tight manner and mounted upstream of a water separator system, on the flow medium side, and in an upper region, from superheater tubes welded together in a gastight manner and mounted downstream of the water separator system on the flow medium side. The boundary between the regions of the evaporation tubes and the superheater tubes is essentially horizontal around the combustion chamber, in a region of the bottom of the horizontal gas duct. | 08-25-2011 |
| 20110214624 | METHOD AND DEVICE FOR PRODUCING A GASEOUS MEDIUM COMPRISING STEAM - The invention relates to a method for producing a gaseous medium comprising steam, said steam being produced from a first fluid medium separated from the exhaust gas from combustion of a fuel in a steam generating step, said fuel being provided for burning for providing energy for heating said first fluid medium, comprising the steps of mixing the steam thus produced with exhaust gas from combustion of said fuel; and supplying at least one chemical substance different from air and water to said steam and exhaust gas mixture. The invention also relates to a device for producing a gaseous medium comprising steam. | 09-08-2011 |
| 20110239961 | ONCE-THROUGH VERTICAL EVAPORATORS FOR WIDE RANGE OF OPERATING TEMPERATURES - An evaporator for steam generation is presented. The evaporator includes a plurality of primary evaporator stages and a secondary evaporator stage. Each primary stage includes one or more primary arrays of heat transfer tubes, an outlet manifold coupled to the arrays, and a downcomer coupled to the manifold. Each of the primary arrays has an inlet for receiving a fluid and is arranged transverse to a flow of gas through the evaporator. The gas heats the fluid flowing through the arrays to form a two phase flow. The outlet manifold receives the two phase flow from the arrays and the downcomer distributes the flow as a component of a primary stage flow. One or more of the plurality of primary evaporator stages selectively form the primary stage flow from respective components of the two phase flow, and provide the primary stage flow to inlets of the secondary evaporator stage. | 10-06-2011 |
| 20110315094 | Continuous Evaporator - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium can flow from bottom to top, and a second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium can flow from bottom to top. The second steam generator tubes are designed in such a manner that the average mass flow density which can be controlled in the full load operation does not fall below a predetermined minimum mass flow density in the second steam generator tubes. | 12-29-2011 |
| 20110315095 | CONTINUOUS EVAPORATOR - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium can flow from bottom to top, and a second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium can flow from bottom to top. The first steam generator tubes are designed in such a manner that the average mass flow density which may be controlled in the full load operation does not fall below the predetermined minimum mass flow density in the first steam generator tubes. | 12-29-2011 |
| 20120017853 | WASTE HEAT BOILER - Waste heat boiler ( | 01-26-2012 |
| 20120024241 | Continuous evaporator - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium may flow from bottom to top, and another second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium may flow from bottom to top. An aperature system is arranged downstream of the second steam generator tubes on the flow medium side. | 02-02-2012 |
| 20120073520 | CONTINUOUS EVAPORATOR - A continuous evaporator for a horizontal waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface that has a number of essentially vertically arranged first steam generating tubes wherein the circulation takes place from the bottom to the top, and another second evaporator heating surface located downstream of the first evaporator heating surface on the side of the flow medium, the second evaporator heating surface including a number of other essentially vertically arranged second steam generating tubes wherein the circulation takes place from the bottom to the top is provided. In order to provide a continuous evaporator with an especially simple structure and an especially long service life, a number of second steam generator tubes have an inner profiled element. | 03-29-2012 |
| 20120180739 | CASCADING ONCE THROUGH EVAPORATOR - A steam generator includes a substantially horizontal gas conduit ( | 07-19-2012 |
| 20120204817 | CONFIGURATIONS AND METHODS OF GENERATING LOW-PRESSURE STEAM - Low-pressure steam for a steam consuming device, and particularly a steam reboiler, is generated at the steam consumption pressure to maximize the heat recovery from a utility fuel and/or waste heat source. Most preferably, steam is generated at the lowest possible pressure by fluidly coupling the steam generator to the steam consuming device (e.g., by integrating the condensate drum with the steam drum). Therefore, it should be appreciated that the steam generator pressure in such configurations and methods will ride on the reboiler pressure. | 08-16-2012 |
| 20120234263 | PROCESSES AND SYSTEMS FOR GENERATING STEAM FROM MULTIPLE HOT PROCESS STREAMS - Embodiments of processes and an apparatus for generating steam are provided. The process comprises the steps of indirectly heating water in a first thermosyphon heat exchanger with a first hot stream to form a first stream of heated water comprising steam. The first stream of heated water is fluidly communicated to a first steam drum via natural circulation. Water is indirectly heated in a second thermosyphon heat exchanger with a second hot stream from the process unit to form a second stream of heated water comprising steam. The second stream of heated water is fluidly communicated to the first steam drum via natural circulation. Steam is recovered from the first steam drum. | 09-20-2012 |
| 20120240871 | METHOD AND CONFIGURATION TO REDUCE FATIGUE IN STEAM DRUMS - A heat recovery steam generator that includes a first steam drum for receiving a flow of water and steam from an evaporator. The first steam drum is adapted to provide the flow of water and steam to a second steam drum. The second steam drum is in fluid communication with the first steam drum and receives the flow of water and steam from the first steam drum and separates steam from the flow of water and steam to form a separated steam. There is a steam flow outlet positioned in the second steam drum, the steam flow outlet adapted to release the separated steam from the second steam drum. | 09-27-2012 |
| 20120247406 | METHOD OF CONTROLLING DRUM TEMPERATURE TRANSIENTS - An evaporator system comprises an evaporator; a drum; and a pump that are in fluid communication with each other. The pump is operative to create a temporary pressure gradient during start-up of an evaporator system and transport a fluid from the evaporator to the drum prior to the fluid reaching its boiling point in the evaporator. Following the fluid reaching its boiling point in the evaporator, the fluid naturally circulates in the evaporator system. | 10-04-2012 |
| 20130047938 | METHOD FOR OPERATING A STEAM GENERATOR - A method for operating a steam generator comprising a combustion chamber having a plurality of evaporator heating surfaces which are connected in parallel on the flow medium side is provided. An object is to provide a steam generator which has a particularly long service life and which is particularly reliable. For this purpose, a flow medium is introduced into an inlet of a first evaporator heating surface at a temperature which is lower than the temperature of the flow medium introduced into the inlet of a second evaporator heating surface. | 02-28-2013 |
| 20130125842 | METHODS AND SYSTEMS FOR HEATING AND MANIPULATING FLUIDS - Systems and methods are provided for heating and manipulating a fluid to heat the fluid, evaporate water from the fluid, concentrate the fluid, separate the fluid into fractions; and/or pasteurize the fluid, comprising a closed-loop heating subsystem coupled to a primary fluid-to-fluid heat exchanger, and one or more fluid manipulation subsystems also coupled to the primary fluid-to-fluid heat exchanger. | 05-23-2013 |
| 20130180475 | WASTE HEAT BOILER - A waste heat boiler has heat exchange tubes for indirect heat exchange of a relatively hot process gas and a cooling media, and a by-pass tube for by-passing a part of the process gas; a process gas collector collects and mixes a part of the heat exchanged process gas and at least a part of the by-passed process gas before the mix is lead via a control valve to the process gas outlet of the waste heat boiler together with the rest of the heat exchanged process gas. | 07-18-2013 |
| 20130291808 | METHOD FOR UTILIZING THERMAL ENERGY OF PRODUCT GASES IN A BTL PLANT - The invention for utilizing thermal energy of gases generated in a BtL plant. A feature of the invention is that the thermal energy of discharge gas streams generated in the BtL plant is used for driving various compressor machineries and/or electricity generation, whereby the plant can operate as a stand-alone facility. | 11-07-2013 |
| 20130291809 | DOMESTIC COMBINED HEAT AND POWER SYSTEM - The present invention relates to a domestic combined heat and power system, and the domestic combined heat and power system includes a power unit, a heat-storage tank which receives waste heat of the power unit and stores heat in direct water, and a main heat exchanger which is connected to the heat-storage tank and is heated by a burner so as to use the water as hot water or heating water, in which a waste-heat heat exchanger filled with a heat-transfer medium is installed between the power unit and the heat-storage tank such that a waste-heat pipe of the power unit is arranged in the form of a coil at one side inside the waste-heat heat exchanger, and a heat-storage pipe of the heat-storage tank is arranged in the form of a coil at the other side, so that waste heat of the power unit is indirectly heat exchanged to the heat-storage tank through the heat-transfer medium; in which hot-water piping coming out from the heat-storage tank is arranged so as to be indirectly heat exchanged via a hot-water heat exchanger, and heating piping coming out from the heat-storage tank is connected to the heating water-heat exchanger, and a part of the heating piping again comes out and is arranged so as to be indirectly heat exchanged via the hot-water heat exchanger. According to the present invention, since a heat-exchange method for the power unit and the heat-storage tank is changed into an indirect heat-exchange method, costs and waste of energy consumption are reduced, and there is sharing of functions that are duplicated across the heat-storage tank and a boiler such that efficient system design is possible, variability and compatibility are enhanced, and the system volume is reduced such that installation space may be more effectively used. | 11-07-2013 |
| 20140000535 | METALLURGICAL PLANT WITH EFFICIENT WASTE-HEAT UTILIZATION | 01-02-2014 |
| 20140116361 | Systems and Methods for Heat Recovery Steam Generation at Dual Pressures - Systems for the recovery of heat from hot air exhaust from industrial processes, and the utilization of recovered heat to generate steam at two discrete (high and low) pressures. The systems match steam production with demand. The systems utilize efficient finned tube exchange units made up of modular sections that can be selectively associated with either high or low pressure steam generators. The systems utilize separate steam domes for each of the discrete steam pressures. The steam dome components may be structured apart from the heat exchange components. Each steam dome utilizes its own sensor and control instrumentation to vary the allocation of heat recovered to either or both the high or low pressure steam generator. The two generator subsystems are linked to operate variably according to demand. Monitoring upstream heat and downstream steam requirements allow for automated operation and allocation of recovered heat into the two subsystems. | 05-01-2014 |
| 20140216365 | SYSTEM AND METHOD FOR HEAT RECOVERY STEAM GENERATORS - A system includes a heat recovery steam generator (HRSG) including a plurality of evaporator sections. At least one evaporator section includes a natural circulation evaporator configured to generate a saturated steam, a once-through evaporator configured to generate a first superheated steam, a first superheater configured to receive the saturated steam from the natural circulation evaporator, and a second superheater configured to receive the first superheated steam from the once-through evaporator. | 08-07-2014 |
| 20140305386 | COGENERATION SYSTEM AND METHOD FOR CONTROLLING SAME - The cogeneration system includes: a cogeneration apparatus which generates electric power using supplied fuel gas and supplies the electric power and heat; a heat accumulator which accumulates the heat supplied by the cogeneration apparatus; a controller which controls at least start and stop of the cogeneration apparatus; and a display unit that displays a remaining power generation duration which is a length of time for which the cogeneration apparatus can continue power generation. The controller further calculates the remaining power generation duration based on a remaining heat accumulation capacity which is a difference between (a) a maximum accumulable heat amount which is the amount of heat the heat accumulator is capable of accumulating and (b) a current accumulated heat amount that is the amount of heat currently accumulated in the heat accumulator, and causes the display unit to display the calculated remaining power generation duration. | 10-16-2014 |
| 20150075450 | HEAT RECOVERY FROM A HIGH PRESSURE STREAM - A process for recovering heat from a high pressure stream during hydroprocessing, where one embodiment of the process includes serially introducing a high pressure stream from a hot separator into a first steam generator and a second steam generator; using the first steam generator to generate a medium pressure stream of steam, and then using the medium pressure stream as stripping steam. The process also includes using the second steam generator to generate a low pressure stream of steam, and then using the low pressure stream as stripping steam. | 03-19-2015 |
| 20150090202 | SYSTEM AND METHOD FOR DRUM LEVEL CONTROL IN A DRUM OF A HEAT RECOVERY STEAM GENERATOR - A system includes the HRSG having an economizer disposed along a fluid flow path, and a drum disposed along the fluid flow path downstream of the economizer. The HRSG also includes a drum level control module configured to modulate an amount of the fluid provided to the drum along the fluid flow path and a supplemental control module configured to control an amount of the fluid in a different manner than the drum level control module. The heat recovery steam generator also includes a drum level event controller configured to monitor a rate of change of a level of the fluid in the drum. If the rate of change is over a threshold value, a signal goes to the supplemental control. If the rate of change is less than or equal to the threshold value, the signal goes to the drum level control module. | 04-02-2015 |
| 20150107537 | RECOVERY SYSTEM OF WASTE HEAT FROM FLUE GAS - A recovery system of waste heat from flue gas. The system includes a first heat exchanger and a second exchanger. The first heat exchanger includes a heat absorption section, a heat release section, and a first pipeline. The second heat exchanger includes a second pipeline including an inlet header and an outlet header. The system further includes a third pipeline. The first heat exchanger is disposed at a relatively high temperature side of a flue, the second heat exchanger is disposed at a relatively low temperature side of the flue, and the first heat exchanger and the second heat exchanger are connected by the third pipeline. The heat absorption section and the heat release section are connected by the first pipeline to form a circulation loop; the heat absorption section is disposed in the flue; the heat release section is disposed in the third pipeline. | 04-23-2015 |
| 20150362173 | Multi-Stage Duct Fired Heat Recovery Steam Generator and Methods of Use - A high efficiency multi-stage duct fired heat recovery steam generator (HRSG) is provided to generate steam for use in thermal enhanced oil recovery (EOR) applications. The HRSG is equipped with a plurality of duct burners in series and a plurality of evaporators for transferring heat from the duct burners to the water to generate steam, with at least one evaporator corresponding to each of the duct burners. Each evaporator is arranged downstream from the corresponding duct burner. Hot exhaust gas from a gas turbine (over 1000° F.) is directed to the duct burners in series, allowing further combustion and maximizing thermal efficiency for the HRSG to have a thermal efficiency of at least 92%, and for the exhaust gas exiting the HRSG to a reduced oxygen level of less than 5%. | 12-17-2015 |
| 20160161106 | A SHELL-AND-TUBE APPARATUS FOR HEAT RECOVERY FROM A HOT PROCESS STREAM - A shell-and-tube apparatus ( | 06-09-2016 |
| 20180023806 | WASTE HEAT BOILER | 01-25-2018 |
| 20130269631 | Steam Delivery System for Biomass Processing - The present invention relates to delivery of steam produced by an electrical power generation plant to a lignocellulosic biomass refinery. | 10-17-2013 |
| 20140202400 | WATER COOLED CO BOILER FLOOR WITH SCREEN GAS DISTRIBUTION INLET - A carbon monoxide (CO) boiler or steam generator having a water cooled CO boiler floor with screen gas distribution inlet to enhance distribution of CO gas in a CO boiler. Either the front or rear wall tubes of the steam generator form an integral screen and the tubes continue, forming a membraned, gas tight enclosure. The floor has a “knee” to redirect the incoming waste CO gas up into the integral screen. The screen may be provided with tube erosion shields to prevent erosion of the screen tubes and to control the distribution of waste gas across the plan area of the furnace. | 07-24-2014 |
| 20150136046 | METHOD FOR USING THE EXHAUST GASES FROM PLANTS FOR RAW IRON MANUFACTURE FOR GENERATING STEAM - A method and a system for generating steam using the waste gases from plants for pig iron manufacture: waste gas removed as export gas ( | 05-21-2015 |
| 20160010852 | ENERGY RECOVERY FOR WASTE GAS CAPTURE SYSTEMS | 01-14-2016 |
| 122007000 | Additional burner | 1 |
| 20080236516 | WATER RECIRCULATION SYSTEM FOR BOILER BACKEND GAS TEMPERATURE CONTROL - A water recirculation system for a steam power plant includes a tapoff line which receives water from a downcomer, and an economizer link which receives water from the tapoff line and transports the water to an economizer. | 10-02-2008 |
| 20080289589 | APPARATUS FOR STEAM HEAT RECOVERY FROM MULTIPLE HEAT STREAMS - Disclosed is an apparatus and process for recovering heat from multiple hot process streams without multiplying instrumentation. Each hot process stream is indirectly heat exchanged with a water circuit which leaves and feeds a steam drum. Heat is added to the steam drum through the addition of water heated outside of the steam drum. The heated liquid and vapor water is heated in heat exchangers decoupled from the steam drum. The water circuits are arranged in parallel with each other and feed a single steam drum to provide a steam product of a desired pressure for which only one set of instrumentation is needed. | 11-27-2008 |
| 20090044767 | BOILER ARRANGEMENT - In a boiler, a space is reserved to expand the boiler by increasing the front and rear walls. To expand the boiler, wall additions are added to increase the width of the front and rear walls. After the expansion, the distance between the front and rear walls is substantially the same distance between the front and rear walls before the expansion. | 02-19-2009 |
| 20090050079 | Economizer for a steam generator - An economizer for a heat recovery steam generator utilized to improve the efficiency of the Rankine cycle by preheating the water that flows to the evaporator section. The economizer multi-pass sections include up-flow tubes only. This arrangement greatly reduces thermal stresses on the tubes by ensuring that each individual tube in any fluid-flow pass operates at the same or similar temperature. The design of the invention does this by causing all tubes in any fluid-flow pass to have the same upwards fluid flow direction and similar fluid flow velocity. No unstable backflow (i.e. flow in the reverse direction) occurs in any of the tubes. Heated down-flow tube sections are totally eliminated in this design. Respective jumper pipes are provided to conduct the water from the top of an economizer panel to the bottom of an adjacent panel. | 02-26-2009 |
| 20090071419 | Steam Generator - The invention relates to a steam generator wherein a continuous heating panel of a generator, which is formed from a number of evaporator tubes, and an overheating panel, which is formed from a number of over-heating tubes which are arranged downstream from the evaporator tubes and on the flow side, are arranged in a heating gas channel. According to the invention, a water separating element is integrated into a number of over-flow tubes which are connected on the flow side of one of several evaporator tubes to one or several overheating tubes. | 03-19-2009 |
| 20090241860 | ENHANCED STEAM CYCLE UTILIZING A DUAL PRESSURE RECOVERY BOILER WITH REHEAT - An enhanced steam cycle utilizing a dual pressure recovery boiler with reheat allows a large increase in electrical generation with various turbine cycles while overcoming traditional lower furnace material limitations. A dual pressure designed recovery boiler furnace is provided with a lower furnace and an upper furnace. The lower furnace is operated at a lower temperature to prevent or reduce corrosion of the lower furnace wall tubes caused by the reducing environment. The lower furnace can be either a low pressure natural circulation steam generating (drum) system or economizer. Unlike the lower furnace, the upper furnace is not exposed to a reducing environment and is therefore not as susceptible to severe corrosion rates. The upper furnace is operated at higher temperatures and pressures which permit implementation of higher efficiency reheat steam cycles. The upper furnace thus operates as a high pressure natural circulation steam generating (drum) system, or as a once-through supercritical steam generating system. The dual pressure recovery boiler can thus be coupled to a variety of condensing, non-condensing or a combination of condensing and non-condensing turbine cycles to provide a large increase in electrical generation. | 10-01-2009 |
| 20090260585 | Oxyfuel Combusting Boiler System and a Method of Generating Power By Using the Boiler System - Carbonaceous fuel is combusted with an oxidant gas in a furnace of a boiler system to generate power. Oxidant gas is fed into the furnace for combusting the fuel to produce exhaust gas, the exhaust gas is discharged from the furnace via an exhaust gas channel, a stream of feedwater is conveyed from a final economizer arranged in the exhaust gas channel to evaporating and superheating heat exchange surfaces arranged in the furnace and in the exhaust gas channel for converting the feedwater to superheated steam, the superheated steam is converted in a high-pressure steam turbine for generating power, a first portion of steam is extracted from the high-pressure steam turbine for preheating the feedwater, a second portion of steam is conveyed from the high-pressure steam turbine to reheating heat exchange surfaces arranged in the exhaust gas channel for generating reheated steam, and the reheated steam is expanded in an intermediate pressure steam turbine for generating power. The oxidant gas can be a mixture of substantially pure oxygen and recycled exhaust gas, and the ratio of the first and second portions of steam can be controlled to obtain a desired flue gas temperature in the exhaust gas channel downstream of the final economizer. | 10-22-2009 |
| 20100012051 | Compact, Tiered Sulfur Recovery Unit - A compact, tiered sulfur recovery unit having a burner, a combustion chamber, a reaction chamber, a waste heat boiler and a steam drum. The waste heat boiler is mounted above the reaction chamber, and the steam drum is mounted above the waste heat boiler, resulting in a three-tiered, compact design, requiring only a single platform for space. The reaction chamber comprises a horizontal body and an upright plenum. The reaction chamber includes an inlet for receipt of acid gas (H | 01-21-2010 |
| 20100126434 | INTEGRATED LIME KILM PROCESS - A process and system for recovering waste heat from a kiln used for lime or cement production. The system unifies the kiln, a waste heat recovery and power generation circuit and a dry scrubber for scrubbing the pollutants from the kiln offgas. Essentially, the system employs the boiler component of the waste heat recovery and power generation circuit as a heat exchanger to recover the waste heat from the kiln, which is used to drive the steam turbines. The heat absorption from the latter stage lowers the temperature of the kiln offgas sufficiently for optimum performance from the scrubber. The presence of lime particles in the offgas effectively protects the boiler tube surfaces from corrosion which would occur at optimum scrubber temperatures, and subsequently provides the lime required as a scrubbing medium for the dry scrubber. Further, the efficient scrubbing allows for the use of any fuel for firing the kiln inclusive of high sulphur content compounds. A process for effecting the technology is also provided. | 05-27-2010 |
| 20100139581 | VESSEL FOR COOLING SYNGAS - A vessel for cooling syngas comprising | 06-10-2010 |
| 20100192877 | Sustainable Waste Heat Management System - A self-contained waste heat recovery system for a commercial oven provides circulating an energy source to an oven heating system. The oven heating system recovers heat from an oven stack or downstream of oxidizer if used and distributes the heat to bakery systems such as proofers, tray washers, process water heating and other points of use. The system features secondary loops to ensure constant flow of the energy source throughout the system optimizing energy savings. | 08-05-2010 |
| 20110041783 | Steam Generator - A steam generator of a technical plant, in particular a power plant, comprising a heating gas passage enclosed by a gas-tight enclosing wall, wherein the heating gas passage has a number of heating surfaces through which a flow medium can flow, is to ensure especially reliable cleaning of the heating gas flowing off from the heating gas passage at an especially low design and production cost. To this end, provision is made according to the invention for at least one of the heating surfaces to be at least partly provided with a catalytic coating on its side facing the heating gas. | 02-24-2011 |
| 20110048344 | WATER HEATING APPARATUS - A water heating apparatus includes: an exhaust gas passage through which an exhaust gas from a burner flows; a water flow passage through which water flows; a first heat exchanger configured to exchange heat between sensible heat contained in the exhaust gas and water flowing through a heat exchanger tube, and arranged at upstream side of the exhaust gas passage and downstream side of the water flow passage; a second heat exchanger configured to exchange heat between latent heat contained in the exhaust gas and water flowing through a heat exchanger tube, and arranged at downstream side of the exhaust gas passage and upstream side of the water flow passage; and a bypass pipe arranged in the water flow passage in such a position as to bypass the second heat exchanger and designed to allow a at least the predetermined minimum amount of water required for a burner combustion operation to flow therethrough into the first heat exchanger. | 03-03-2011 |
| 20110083620 | Waste Heat Recovery System and Method Thereof - A waste heat recovery system comprises a steam generator, a processor, a first heat exchanger, and a second heat exchanger. The steam generator generates an original steam using water. The first heat exchanger condensates the first steam and emit water and a second steam from the processor. The second heat exchanger condensates the second steam from the first heat exchanger. The second heat exchanger condensates the second steam from the first heat exchanger leaving water only. The water from the first heat exchanger and the second heat exchanger may be guided into the steam generator or into the first heat exchanger. The second heat exchanger comprises one or more pressure relief valve. The pressure relief valve operates when inner pressure of the second heat exchanger exceeds above a predetermined value. | 04-14-2011 |
| 20110162594 | Waste Heat Steam Generator - A waste heat steam generator including evaporator tubes is provided. The evaporator tubes are connected in parallel on the flow medium side, a plurality of overheating tubes are mounted downstream of the evaporator tubes using a water separation system. The water separation system includes water separation elements, each water separation element being respectively mounted downstream of the plurality of evaporator tubes and/or upstream of a plurality of overheating tubes. Each water separating element includes an inlet pipe which is respectively connected upstream to the evaporator tubes, the inlet pipe extending into a water evacuation pipe when seen in the longitudinal direction. A plurality of outflow pipes branch off in the transitional area, the pipes being connected to an inlet collector of the overheating tubes which are respectively connected downstream. A distribution element is arranged on the steam side between the respective water separating element and the inlet collector. | 07-07-2011 |
| 20110203536 | Continuous steam generator - A continuous steam generator is provided. The continuous steam generator includes a combustion chamber having a number of burners for fossil fuels, downstream of which a vertical gas duct is mounted, on the hot gas side, in an upper region above a horizontal gas duct. The outside wall of the combustion chamber is formed, in a lower region, from evaporation tubes welded together in a gas-tight manner and mounted upstream of a water separator system, on the flow medium side, and in an upper region, from superheater tubes welded together in a gastight manner and mounted downstream of the water separator system on the flow medium side. The boundary between the regions of the evaporation tubes and the superheater tubes is essentially horizontal around the combustion chamber, in a region of the bottom of the horizontal gas duct. | 08-25-2011 |
| 20110214624 | METHOD AND DEVICE FOR PRODUCING A GASEOUS MEDIUM COMPRISING STEAM - The invention relates to a method for producing a gaseous medium comprising steam, said steam being produced from a first fluid medium separated from the exhaust gas from combustion of a fuel in a steam generating step, said fuel being provided for burning for providing energy for heating said first fluid medium, comprising the steps of mixing the steam thus produced with exhaust gas from combustion of said fuel; and supplying at least one chemical substance different from air and water to said steam and exhaust gas mixture. The invention also relates to a device for producing a gaseous medium comprising steam. | 09-08-2011 |
| 20110239961 | ONCE-THROUGH VERTICAL EVAPORATORS FOR WIDE RANGE OF OPERATING TEMPERATURES - An evaporator for steam generation is presented. The evaporator includes a plurality of primary evaporator stages and a secondary evaporator stage. Each primary stage includes one or more primary arrays of heat transfer tubes, an outlet manifold coupled to the arrays, and a downcomer coupled to the manifold. Each of the primary arrays has an inlet for receiving a fluid and is arranged transverse to a flow of gas through the evaporator. The gas heats the fluid flowing through the arrays to form a two phase flow. The outlet manifold receives the two phase flow from the arrays and the downcomer distributes the flow as a component of a primary stage flow. One or more of the plurality of primary evaporator stages selectively form the primary stage flow from respective components of the two phase flow, and provide the primary stage flow to inlets of the secondary evaporator stage. | 10-06-2011 |
| 20110315094 | Continuous Evaporator - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium can flow from bottom to top, and a second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium can flow from bottom to top. The second steam generator tubes are designed in such a manner that the average mass flow density which can be controlled in the full load operation does not fall below a predetermined minimum mass flow density in the second steam generator tubes. | 12-29-2011 |
| 20110315095 | CONTINUOUS EVAPORATOR - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium can flow from bottom to top, and a second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium can flow from bottom to top. The first steam generator tubes are designed in such a manner that the average mass flow density which may be controlled in the full load operation does not fall below the predetermined minimum mass flow density in the first steam generator tubes. | 12-29-2011 |
| 20120017853 | WASTE HEAT BOILER - Waste heat boiler ( | 01-26-2012 |
| 20120024241 | Continuous evaporator - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium may flow from bottom to top, and another second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium may flow from bottom to top. An aperature system is arranged downstream of the second steam generator tubes on the flow medium side. | 02-02-2012 |
| 20120073520 | CONTINUOUS EVAPORATOR - A continuous evaporator for a horizontal waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface that has a number of essentially vertically arranged first steam generating tubes wherein the circulation takes place from the bottom to the top, and another second evaporator heating surface located downstream of the first evaporator heating surface on the side of the flow medium, the second evaporator heating surface including a number of other essentially vertically arranged second steam generating tubes wherein the circulation takes place from the bottom to the top is provided. In order to provide a continuous evaporator with an especially simple structure and an especially long service life, a number of second steam generator tubes have an inner profiled element. | 03-29-2012 |
| 20120180739 | CASCADING ONCE THROUGH EVAPORATOR - A steam generator includes a substantially horizontal gas conduit ( | 07-19-2012 |
| 20120204817 | CONFIGURATIONS AND METHODS OF GENERATING LOW-PRESSURE STEAM - Low-pressure steam for a steam consuming device, and particularly a steam reboiler, is generated at the steam consumption pressure to maximize the heat recovery from a utility fuel and/or waste heat source. Most preferably, steam is generated at the lowest possible pressure by fluidly coupling the steam generator to the steam consuming device (e.g., by integrating the condensate drum with the steam drum). Therefore, it should be appreciated that the steam generator pressure in such configurations and methods will ride on the reboiler pressure. | 08-16-2012 |
| 20120234263 | PROCESSES AND SYSTEMS FOR GENERATING STEAM FROM MULTIPLE HOT PROCESS STREAMS - Embodiments of processes and an apparatus for generating steam are provided. The process comprises the steps of indirectly heating water in a first thermosyphon heat exchanger with a first hot stream to form a first stream of heated water comprising steam. The first stream of heated water is fluidly communicated to a first steam drum via natural circulation. Water is indirectly heated in a second thermosyphon heat exchanger with a second hot stream from the process unit to form a second stream of heated water comprising steam. The second stream of heated water is fluidly communicated to the first steam drum via natural circulation. Steam is recovered from the first steam drum. | 09-20-2012 |
| 20120240871 | METHOD AND CONFIGURATION TO REDUCE FATIGUE IN STEAM DRUMS - A heat recovery steam generator that includes a first steam drum for receiving a flow of water and steam from an evaporator. The first steam drum is adapted to provide the flow of water and steam to a second steam drum. The second steam drum is in fluid communication with the first steam drum and receives the flow of water and steam from the first steam drum and separates steam from the flow of water and steam to form a separated steam. There is a steam flow outlet positioned in the second steam drum, the steam flow outlet adapted to release the separated steam from the second steam drum. | 09-27-2012 |
| 20120247406 | METHOD OF CONTROLLING DRUM TEMPERATURE TRANSIENTS - An evaporator system comprises an evaporator; a drum; and a pump that are in fluid communication with each other. The pump is operative to create a temporary pressure gradient during start-up of an evaporator system and transport a fluid from the evaporator to the drum prior to the fluid reaching its boiling point in the evaporator. Following the fluid reaching its boiling point in the evaporator, the fluid naturally circulates in the evaporator system. | 10-04-2012 |
| 20130047938 | METHOD FOR OPERATING A STEAM GENERATOR - A method for operating a steam generator comprising a combustion chamber having a plurality of evaporator heating surfaces which are connected in parallel on the flow medium side is provided. An object is to provide a steam generator which has a particularly long service life and which is particularly reliable. For this purpose, a flow medium is introduced into an inlet of a first evaporator heating surface at a temperature which is lower than the temperature of the flow medium introduced into the inlet of a second evaporator heating surface. | 02-28-2013 |
| 20130125842 | METHODS AND SYSTEMS FOR HEATING AND MANIPULATING FLUIDS - Systems and methods are provided for heating and manipulating a fluid to heat the fluid, evaporate water from the fluid, concentrate the fluid, separate the fluid into fractions; and/or pasteurize the fluid, comprising a closed-loop heating subsystem coupled to a primary fluid-to-fluid heat exchanger, and one or more fluid manipulation subsystems also coupled to the primary fluid-to-fluid heat exchanger. | 05-23-2013 |
| 20130180475 | WASTE HEAT BOILER - A waste heat boiler has heat exchange tubes for indirect heat exchange of a relatively hot process gas and a cooling media, and a by-pass tube for by-passing a part of the process gas; a process gas collector collects and mixes a part of the heat exchanged process gas and at least a part of the by-passed process gas before the mix is lead via a control valve to the process gas outlet of the waste heat boiler together with the rest of the heat exchanged process gas. | 07-18-2013 |
| 20130291808 | METHOD FOR UTILIZING THERMAL ENERGY OF PRODUCT GASES IN A BTL PLANT - The invention for utilizing thermal energy of gases generated in a BtL plant. A feature of the invention is that the thermal energy of discharge gas streams generated in the BtL plant is used for driving various compressor machineries and/or electricity generation, whereby the plant can operate as a stand-alone facility. | 11-07-2013 |
| 20130291809 | DOMESTIC COMBINED HEAT AND POWER SYSTEM - The present invention relates to a domestic combined heat and power system, and the domestic combined heat and power system includes a power unit, a heat-storage tank which receives waste heat of the power unit and stores heat in direct water, and a main heat exchanger which is connected to the heat-storage tank and is heated by a burner so as to use the water as hot water or heating water, in which a waste-heat heat exchanger filled with a heat-transfer medium is installed between the power unit and the heat-storage tank such that a waste-heat pipe of the power unit is arranged in the form of a coil at one side inside the waste-heat heat exchanger, and a heat-storage pipe of the heat-storage tank is arranged in the form of a coil at the other side, so that waste heat of the power unit is indirectly heat exchanged to the heat-storage tank through the heat-transfer medium; in which hot-water piping coming out from the heat-storage tank is arranged so as to be indirectly heat exchanged via a hot-water heat exchanger, and heating piping coming out from the heat-storage tank is connected to the heating water-heat exchanger, and a part of the heating piping again comes out and is arranged so as to be indirectly heat exchanged via the hot-water heat exchanger. According to the present invention, since a heat-exchange method for the power unit and the heat-storage tank is changed into an indirect heat-exchange method, costs and waste of energy consumption are reduced, and there is sharing of functions that are duplicated across the heat-storage tank and a boiler such that efficient system design is possible, variability and compatibility are enhanced, and the system volume is reduced such that installation space may be more effectively used. | 11-07-2013 |
| 20140000535 | METALLURGICAL PLANT WITH EFFICIENT WASTE-HEAT UTILIZATION | 01-02-2014 |
| 20140116361 | Systems and Methods for Heat Recovery Steam Generation at Dual Pressures - Systems for the recovery of heat from hot air exhaust from industrial processes, and the utilization of recovered heat to generate steam at two discrete (high and low) pressures. The systems match steam production with demand. The systems utilize efficient finned tube exchange units made up of modular sections that can be selectively associated with either high or low pressure steam generators. The systems utilize separate steam domes for each of the discrete steam pressures. The steam dome components may be structured apart from the heat exchange components. Each steam dome utilizes its own sensor and control instrumentation to vary the allocation of heat recovered to either or both the high or low pressure steam generator. The two generator subsystems are linked to operate variably according to demand. Monitoring upstream heat and downstream steam requirements allow for automated operation and allocation of recovered heat into the two subsystems. | 05-01-2014 |
| 20140216365 | SYSTEM AND METHOD FOR HEAT RECOVERY STEAM GENERATORS - A system includes a heat recovery steam generator (HRSG) including a plurality of evaporator sections. At least one evaporator section includes a natural circulation evaporator configured to generate a saturated steam, a once-through evaporator configured to generate a first superheated steam, a first superheater configured to receive the saturated steam from the natural circulation evaporator, and a second superheater configured to receive the first superheated steam from the once-through evaporator. | 08-07-2014 |
| 20140305386 | COGENERATION SYSTEM AND METHOD FOR CONTROLLING SAME - The cogeneration system includes: a cogeneration apparatus which generates electric power using supplied fuel gas and supplies the electric power and heat; a heat accumulator which accumulates the heat supplied by the cogeneration apparatus; a controller which controls at least start and stop of the cogeneration apparatus; and a display unit that displays a remaining power generation duration which is a length of time for which the cogeneration apparatus can continue power generation. The controller further calculates the remaining power generation duration based on a remaining heat accumulation capacity which is a difference between (a) a maximum accumulable heat amount which is the amount of heat the heat accumulator is capable of accumulating and (b) a current accumulated heat amount that is the amount of heat currently accumulated in the heat accumulator, and causes the display unit to display the calculated remaining power generation duration. | 10-16-2014 |
| 20150075450 | HEAT RECOVERY FROM A HIGH PRESSURE STREAM - A process for recovering heat from a high pressure stream during hydroprocessing, where one embodiment of the process includes serially introducing a high pressure stream from a hot separator into a first steam generator and a second steam generator; using the first steam generator to generate a medium pressure stream of steam, and then using the medium pressure stream as stripping steam. The process also includes using the second steam generator to generate a low pressure stream of steam, and then using the low pressure stream as stripping steam. | 03-19-2015 |
| 20150090202 | SYSTEM AND METHOD FOR DRUM LEVEL CONTROL IN A DRUM OF A HEAT RECOVERY STEAM GENERATOR - A system includes the HRSG having an economizer disposed along a fluid flow path, and a drum disposed along the fluid flow path downstream of the economizer. The HRSG also includes a drum level control module configured to modulate an amount of the fluid provided to the drum along the fluid flow path and a supplemental control module configured to control an amount of the fluid in a different manner than the drum level control module. The heat recovery steam generator also includes a drum level event controller configured to monitor a rate of change of a level of the fluid in the drum. If the rate of change is over a threshold value, a signal goes to the supplemental control. If the rate of change is less than or equal to the threshold value, the signal goes to the drum level control module. | 04-02-2015 |
| 20150107537 | RECOVERY SYSTEM OF WASTE HEAT FROM FLUE GAS - A recovery system of waste heat from flue gas. The system includes a first heat exchanger and a second exchanger. The first heat exchanger includes a heat absorption section, a heat release section, and a first pipeline. The second heat exchanger includes a second pipeline including an inlet header and an outlet header. The system further includes a third pipeline. The first heat exchanger is disposed at a relatively high temperature side of a flue, the second heat exchanger is disposed at a relatively low temperature side of the flue, and the first heat exchanger and the second heat exchanger are connected by the third pipeline. The heat absorption section and the heat release section are connected by the first pipeline to form a circulation loop; the heat absorption section is disposed in the flue; the heat release section is disposed in the third pipeline. | 04-23-2015 |
| 20150362173 | Multi-Stage Duct Fired Heat Recovery Steam Generator and Methods of Use - A high efficiency multi-stage duct fired heat recovery steam generator (HRSG) is provided to generate steam for use in thermal enhanced oil recovery (EOR) applications. The HRSG is equipped with a plurality of duct burners in series and a plurality of evaporators for transferring heat from the duct burners to the water to generate steam, with at least one evaporator corresponding to each of the duct burners. Each evaporator is arranged downstream from the corresponding duct burner. Hot exhaust gas from a gas turbine (over 1000° F.) is directed to the duct burners in series, allowing further combustion and maximizing thermal efficiency for the HRSG to have a thermal efficiency of at least 92%, and for the exhaust gas exiting the HRSG to a reduced oxygen level of less than 5%. | 12-17-2015 |
| 20160161106 | A SHELL-AND-TUBE APPARATUS FOR HEAT RECOVERY FROM A HOT PROCESS STREAM - A shell-and-tube apparatus ( | 06-09-2016 |
| 20180023806 | WASTE HEAT BOILER | 01-25-2018 |
| 20130269631 | Steam Delivery System for Biomass Processing - The present invention relates to delivery of steam produced by an electrical power generation plant to a lignocellulosic biomass refinery. | 10-17-2013 |
| 20140202400 | WATER COOLED CO BOILER FLOOR WITH SCREEN GAS DISTRIBUTION INLET - A carbon monoxide (CO) boiler or steam generator having a water cooled CO boiler floor with screen gas distribution inlet to enhance distribution of CO gas in a CO boiler. Either the front or rear wall tubes of the steam generator form an integral screen and the tubes continue, forming a membraned, gas tight enclosure. The floor has a “knee” to redirect the incoming waste CO gas up into the integral screen. The screen may be provided with tube erosion shields to prevent erosion of the screen tubes and to control the distribution of waste gas across the plan area of the furnace. | 07-24-2014 |
| 20150136046 | METHOD FOR USING THE EXHAUST GASES FROM PLANTS FOR RAW IRON MANUFACTURE FOR GENERATING STEAM - A method and a system for generating steam using the waste gases from plants for pig iron manufacture: waste gas removed as export gas ( | 05-21-2015 |
| 20160010852 | ENERGY RECOVERY FOR WASTE GAS CAPTURE SYSTEMS | 01-14-2016 |
| 122007000 | Waste sulfite | 1 |
| 20080236516 | WATER RECIRCULATION SYSTEM FOR BOILER BACKEND GAS TEMPERATURE CONTROL - A water recirculation system for a steam power plant includes a tapoff line which receives water from a downcomer, and an economizer link which receives water from the tapoff line and transports the water to an economizer. | 10-02-2008 |
| 20080289589 | APPARATUS FOR STEAM HEAT RECOVERY FROM MULTIPLE HEAT STREAMS - Disclosed is an apparatus and process for recovering heat from multiple hot process streams without multiplying instrumentation. Each hot process stream is indirectly heat exchanged with a water circuit which leaves and feeds a steam drum. Heat is added to the steam drum through the addition of water heated outside of the steam drum. The heated liquid and vapor water is heated in heat exchangers decoupled from the steam drum. The water circuits are arranged in parallel with each other and feed a single steam drum to provide a steam product of a desired pressure for which only one set of instrumentation is needed. | 11-27-2008 |
| 20090044767 | BOILER ARRANGEMENT - In a boiler, a space is reserved to expand the boiler by increasing the front and rear walls. To expand the boiler, wall additions are added to increase the width of the front and rear walls. After the expansion, the distance between the front and rear walls is substantially the same distance between the front and rear walls before the expansion. | 02-19-2009 |
| 20090050079 | Economizer for a steam generator - An economizer for a heat recovery steam generator utilized to improve the efficiency of the Rankine cycle by preheating the water that flows to the evaporator section. The economizer multi-pass sections include up-flow tubes only. This arrangement greatly reduces thermal stresses on the tubes by ensuring that each individual tube in any fluid-flow pass operates at the same or similar temperature. The design of the invention does this by causing all tubes in any fluid-flow pass to have the same upwards fluid flow direction and similar fluid flow velocity. No unstable backflow (i.e. flow in the reverse direction) occurs in any of the tubes. Heated down-flow tube sections are totally eliminated in this design. Respective jumper pipes are provided to conduct the water from the top of an economizer panel to the bottom of an adjacent panel. | 02-26-2009 |
| 20090071419 | Steam Generator - The invention relates to a steam generator wherein a continuous heating panel of a generator, which is formed from a number of evaporator tubes, and an overheating panel, which is formed from a number of over-heating tubes which are arranged downstream from the evaporator tubes and on the flow side, are arranged in a heating gas channel. According to the invention, a water separating element is integrated into a number of over-flow tubes which are connected on the flow side of one of several evaporator tubes to one or several overheating tubes. | 03-19-2009 |
| 20090241860 | ENHANCED STEAM CYCLE UTILIZING A DUAL PRESSURE RECOVERY BOILER WITH REHEAT - An enhanced steam cycle utilizing a dual pressure recovery boiler with reheat allows a large increase in electrical generation with various turbine cycles while overcoming traditional lower furnace material limitations. A dual pressure designed recovery boiler furnace is provided with a lower furnace and an upper furnace. The lower furnace is operated at a lower temperature to prevent or reduce corrosion of the lower furnace wall tubes caused by the reducing environment. The lower furnace can be either a low pressure natural circulation steam generating (drum) system or economizer. Unlike the lower furnace, the upper furnace is not exposed to a reducing environment and is therefore not as susceptible to severe corrosion rates. The upper furnace is operated at higher temperatures and pressures which permit implementation of higher efficiency reheat steam cycles. The upper furnace thus operates as a high pressure natural circulation steam generating (drum) system, or as a once-through supercritical steam generating system. The dual pressure recovery boiler can thus be coupled to a variety of condensing, non-condensing or a combination of condensing and non-condensing turbine cycles to provide a large increase in electrical generation. | 10-01-2009 |
| 20090260585 | Oxyfuel Combusting Boiler System and a Method of Generating Power By Using the Boiler System - Carbonaceous fuel is combusted with an oxidant gas in a furnace of a boiler system to generate power. Oxidant gas is fed into the furnace for combusting the fuel to produce exhaust gas, the exhaust gas is discharged from the furnace via an exhaust gas channel, a stream of feedwater is conveyed from a final economizer arranged in the exhaust gas channel to evaporating and superheating heat exchange surfaces arranged in the furnace and in the exhaust gas channel for converting the feedwater to superheated steam, the superheated steam is converted in a high-pressure steam turbine for generating power, a first portion of steam is extracted from the high-pressure steam turbine for preheating the feedwater, a second portion of steam is conveyed from the high-pressure steam turbine to reheating heat exchange surfaces arranged in the exhaust gas channel for generating reheated steam, and the reheated steam is expanded in an intermediate pressure steam turbine for generating power. The oxidant gas can be a mixture of substantially pure oxygen and recycled exhaust gas, and the ratio of the first and second portions of steam can be controlled to obtain a desired flue gas temperature in the exhaust gas channel downstream of the final economizer. | 10-22-2009 |
| 20100012051 | Compact, Tiered Sulfur Recovery Unit - A compact, tiered sulfur recovery unit having a burner, a combustion chamber, a reaction chamber, a waste heat boiler and a steam drum. The waste heat boiler is mounted above the reaction chamber, and the steam drum is mounted above the waste heat boiler, resulting in a three-tiered, compact design, requiring only a single platform for space. The reaction chamber comprises a horizontal body and an upright plenum. The reaction chamber includes an inlet for receipt of acid gas (H | 01-21-2010 |
| 20100126434 | INTEGRATED LIME KILM PROCESS - A process and system for recovering waste heat from a kiln used for lime or cement production. The system unifies the kiln, a waste heat recovery and power generation circuit and a dry scrubber for scrubbing the pollutants from the kiln offgas. Essentially, the system employs the boiler component of the waste heat recovery and power generation circuit as a heat exchanger to recover the waste heat from the kiln, which is used to drive the steam turbines. The heat absorption from the latter stage lowers the temperature of the kiln offgas sufficiently for optimum performance from the scrubber. The presence of lime particles in the offgas effectively protects the boiler tube surfaces from corrosion which would occur at optimum scrubber temperatures, and subsequently provides the lime required as a scrubbing medium for the dry scrubber. Further, the efficient scrubbing allows for the use of any fuel for firing the kiln inclusive of high sulphur content compounds. A process for effecting the technology is also provided. | 05-27-2010 |
| 20100139581 | VESSEL FOR COOLING SYNGAS - A vessel for cooling syngas comprising | 06-10-2010 |
| 20100192877 | Sustainable Waste Heat Management System - A self-contained waste heat recovery system for a commercial oven provides circulating an energy source to an oven heating system. The oven heating system recovers heat from an oven stack or downstream of oxidizer if used and distributes the heat to bakery systems such as proofers, tray washers, process water heating and other points of use. The system features secondary loops to ensure constant flow of the energy source throughout the system optimizing energy savings. | 08-05-2010 |
| 20110041783 | Steam Generator - A steam generator of a technical plant, in particular a power plant, comprising a heating gas passage enclosed by a gas-tight enclosing wall, wherein the heating gas passage has a number of heating surfaces through which a flow medium can flow, is to ensure especially reliable cleaning of the heating gas flowing off from the heating gas passage at an especially low design and production cost. To this end, provision is made according to the invention for at least one of the heating surfaces to be at least partly provided with a catalytic coating on its side facing the heating gas. | 02-24-2011 |
| 20110048344 | WATER HEATING APPARATUS - A water heating apparatus includes: an exhaust gas passage through which an exhaust gas from a burner flows; a water flow passage through which water flows; a first heat exchanger configured to exchange heat between sensible heat contained in the exhaust gas and water flowing through a heat exchanger tube, and arranged at upstream side of the exhaust gas passage and downstream side of the water flow passage; a second heat exchanger configured to exchange heat between latent heat contained in the exhaust gas and water flowing through a heat exchanger tube, and arranged at downstream side of the exhaust gas passage and upstream side of the water flow passage; and a bypass pipe arranged in the water flow passage in such a position as to bypass the second heat exchanger and designed to allow a at least the predetermined minimum amount of water required for a burner combustion operation to flow therethrough into the first heat exchanger. | 03-03-2011 |
| 20110083620 | Waste Heat Recovery System and Method Thereof - A waste heat recovery system comprises a steam generator, a processor, a first heat exchanger, and a second heat exchanger. The steam generator generates an original steam using water. The first heat exchanger condensates the first steam and emit water and a second steam from the processor. The second heat exchanger condensates the second steam from the first heat exchanger. The second heat exchanger condensates the second steam from the first heat exchanger leaving water only. The water from the first heat exchanger and the second heat exchanger may be guided into the steam generator or into the first heat exchanger. The second heat exchanger comprises one or more pressure relief valve. The pressure relief valve operates when inner pressure of the second heat exchanger exceeds above a predetermined value. | 04-14-2011 |
| 20110162594 | Waste Heat Steam Generator - A waste heat steam generator including evaporator tubes is provided. The evaporator tubes are connected in parallel on the flow medium side, a plurality of overheating tubes are mounted downstream of the evaporator tubes using a water separation system. The water separation system includes water separation elements, each water separation element being respectively mounted downstream of the plurality of evaporator tubes and/or upstream of a plurality of overheating tubes. Each water separating element includes an inlet pipe which is respectively connected upstream to the evaporator tubes, the inlet pipe extending into a water evacuation pipe when seen in the longitudinal direction. A plurality of outflow pipes branch off in the transitional area, the pipes being connected to an inlet collector of the overheating tubes which are respectively connected downstream. A distribution element is arranged on the steam side between the respective water separating element and the inlet collector. | 07-07-2011 |
| 20110203536 | Continuous steam generator - A continuous steam generator is provided. The continuous steam generator includes a combustion chamber having a number of burners for fossil fuels, downstream of which a vertical gas duct is mounted, on the hot gas side, in an upper region above a horizontal gas duct. The outside wall of the combustion chamber is formed, in a lower region, from evaporation tubes welded together in a gas-tight manner and mounted upstream of a water separator system, on the flow medium side, and in an upper region, from superheater tubes welded together in a gastight manner and mounted downstream of the water separator system on the flow medium side. The boundary between the regions of the evaporation tubes and the superheater tubes is essentially horizontal around the combustion chamber, in a region of the bottom of the horizontal gas duct. | 08-25-2011 |
| 20110214624 | METHOD AND DEVICE FOR PRODUCING A GASEOUS MEDIUM COMPRISING STEAM - The invention relates to a method for producing a gaseous medium comprising steam, said steam being produced from a first fluid medium separated from the exhaust gas from combustion of a fuel in a steam generating step, said fuel being provided for burning for providing energy for heating said first fluid medium, comprising the steps of mixing the steam thus produced with exhaust gas from combustion of said fuel; and supplying at least one chemical substance different from air and water to said steam and exhaust gas mixture. The invention also relates to a device for producing a gaseous medium comprising steam. | 09-08-2011 |
| 20110239961 | ONCE-THROUGH VERTICAL EVAPORATORS FOR WIDE RANGE OF OPERATING TEMPERATURES - An evaporator for steam generation is presented. The evaporator includes a plurality of primary evaporator stages and a secondary evaporator stage. Each primary stage includes one or more primary arrays of heat transfer tubes, an outlet manifold coupled to the arrays, and a downcomer coupled to the manifold. Each of the primary arrays has an inlet for receiving a fluid and is arranged transverse to a flow of gas through the evaporator. The gas heats the fluid flowing through the arrays to form a two phase flow. The outlet manifold receives the two phase flow from the arrays and the downcomer distributes the flow as a component of a primary stage flow. One or more of the plurality of primary evaporator stages selectively form the primary stage flow from respective components of the two phase flow, and provide the primary stage flow to inlets of the secondary evaporator stage. | 10-06-2011 |
| 20110315094 | Continuous Evaporator - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium can flow from bottom to top, and a second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium can flow from bottom to top. The second steam generator tubes are designed in such a manner that the average mass flow density which can be controlled in the full load operation does not fall below a predetermined minimum mass flow density in the second steam generator tubes. | 12-29-2011 |
| 20110315095 | CONTINUOUS EVAPORATOR - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium can flow from bottom to top, and a second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium can flow from bottom to top. The first steam generator tubes are designed in such a manner that the average mass flow density which may be controlled in the full load operation does not fall below the predetermined minimum mass flow density in the first steam generator tubes. | 12-29-2011 |
| 20120017853 | WASTE HEAT BOILER - Waste heat boiler ( | 01-26-2012 |
| 20120024241 | Continuous evaporator - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium may flow from bottom to top, and another second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium may flow from bottom to top. An aperature system is arranged downstream of the second steam generator tubes on the flow medium side. | 02-02-2012 |
| 20120073520 | CONTINUOUS EVAPORATOR - A continuous evaporator for a horizontal waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface that has a number of essentially vertically arranged first steam generating tubes wherein the circulation takes place from the bottom to the top, and another second evaporator heating surface located downstream of the first evaporator heating surface on the side of the flow medium, the second evaporator heating surface including a number of other essentially vertically arranged second steam generating tubes wherein the circulation takes place from the bottom to the top is provided. In order to provide a continuous evaporator with an especially simple structure and an especially long service life, a number of second steam generator tubes have an inner profiled element. | 03-29-2012 |
| 20120180739 | CASCADING ONCE THROUGH EVAPORATOR - A steam generator includes a substantially horizontal gas conduit ( | 07-19-2012 |
| 20120204817 | CONFIGURATIONS AND METHODS OF GENERATING LOW-PRESSURE STEAM - Low-pressure steam for a steam consuming device, and particularly a steam reboiler, is generated at the steam consumption pressure to maximize the heat recovery from a utility fuel and/or waste heat source. Most preferably, steam is generated at the lowest possible pressure by fluidly coupling the steam generator to the steam consuming device (e.g., by integrating the condensate drum with the steam drum). Therefore, it should be appreciated that the steam generator pressure in such configurations and methods will ride on the reboiler pressure. | 08-16-2012 |
| 20120234263 | PROCESSES AND SYSTEMS FOR GENERATING STEAM FROM MULTIPLE HOT PROCESS STREAMS - Embodiments of processes and an apparatus for generating steam are provided. The process comprises the steps of indirectly heating water in a first thermosyphon heat exchanger with a first hot stream to form a first stream of heated water comprising steam. The first stream of heated water is fluidly communicated to a first steam drum via natural circulation. Water is indirectly heated in a second thermosyphon heat exchanger with a second hot stream from the process unit to form a second stream of heated water comprising steam. The second stream of heated water is fluidly communicated to the first steam drum via natural circulation. Steam is recovered from the first steam drum. | 09-20-2012 |
| 20120240871 | METHOD AND CONFIGURATION TO REDUCE FATIGUE IN STEAM DRUMS - A heat recovery steam generator that includes a first steam drum for receiving a flow of water and steam from an evaporator. The first steam drum is adapted to provide the flow of water and steam to a second steam drum. The second steam drum is in fluid communication with the first steam drum and receives the flow of water and steam from the first steam drum and separates steam from the flow of water and steam to form a separated steam. There is a steam flow outlet positioned in the second steam drum, the steam flow outlet adapted to release the separated steam from the second steam drum. | 09-27-2012 |
| 20120247406 | METHOD OF CONTROLLING DRUM TEMPERATURE TRANSIENTS - An evaporator system comprises an evaporator; a drum; and a pump that are in fluid communication with each other. The pump is operative to create a temporary pressure gradient during start-up of an evaporator system and transport a fluid from the evaporator to the drum prior to the fluid reaching its boiling point in the evaporator. Following the fluid reaching its boiling point in the evaporator, the fluid naturally circulates in the evaporator system. | 10-04-2012 |
| 20130047938 | METHOD FOR OPERATING A STEAM GENERATOR - A method for operating a steam generator comprising a combustion chamber having a plurality of evaporator heating surfaces which are connected in parallel on the flow medium side is provided. An object is to provide a steam generator which has a particularly long service life and which is particularly reliable. For this purpose, a flow medium is introduced into an inlet of a first evaporator heating surface at a temperature which is lower than the temperature of the flow medium introduced into the inlet of a second evaporator heating surface. | 02-28-2013 |
| 20130125842 | METHODS AND SYSTEMS FOR HEATING AND MANIPULATING FLUIDS - Systems and methods are provided for heating and manipulating a fluid to heat the fluid, evaporate water from the fluid, concentrate the fluid, separate the fluid into fractions; and/or pasteurize the fluid, comprising a closed-loop heating subsystem coupled to a primary fluid-to-fluid heat exchanger, and one or more fluid manipulation subsystems also coupled to the primary fluid-to-fluid heat exchanger. | 05-23-2013 |
| 20130180475 | WASTE HEAT BOILER - A waste heat boiler has heat exchange tubes for indirect heat exchange of a relatively hot process gas and a cooling media, and a by-pass tube for by-passing a part of the process gas; a process gas collector collects and mixes a part of the heat exchanged process gas and at least a part of the by-passed process gas before the mix is lead via a control valve to the process gas outlet of the waste heat boiler together with the rest of the heat exchanged process gas. | 07-18-2013 |
| 20130291808 | METHOD FOR UTILIZING THERMAL ENERGY OF PRODUCT GASES IN A BTL PLANT - The invention for utilizing thermal energy of gases generated in a BtL plant. A feature of the invention is that the thermal energy of discharge gas streams generated in the BtL plant is used for driving various compressor machineries and/or electricity generation, whereby the plant can operate as a stand-alone facility. | 11-07-2013 |
| 20130291809 | DOMESTIC COMBINED HEAT AND POWER SYSTEM - The present invention relates to a domestic combined heat and power system, and the domestic combined heat and power system includes a power unit, a heat-storage tank which receives waste heat of the power unit and stores heat in direct water, and a main heat exchanger which is connected to the heat-storage tank and is heated by a burner so as to use the water as hot water or heating water, in which a waste-heat heat exchanger filled with a heat-transfer medium is installed between the power unit and the heat-storage tank such that a waste-heat pipe of the power unit is arranged in the form of a coil at one side inside the waste-heat heat exchanger, and a heat-storage pipe of the heat-storage tank is arranged in the form of a coil at the other side, so that waste heat of the power unit is indirectly heat exchanged to the heat-storage tank through the heat-transfer medium; in which hot-water piping coming out from the heat-storage tank is arranged so as to be indirectly heat exchanged via a hot-water heat exchanger, and heating piping coming out from the heat-storage tank is connected to the heating water-heat exchanger, and a part of the heating piping again comes out and is arranged so as to be indirectly heat exchanged via the hot-water heat exchanger. According to the present invention, since a heat-exchange method for the power unit and the heat-storage tank is changed into an indirect heat-exchange method, costs and waste of energy consumption are reduced, and there is sharing of functions that are duplicated across the heat-storage tank and a boiler such that efficient system design is possible, variability and compatibility are enhanced, and the system volume is reduced such that installation space may be more effectively used. | 11-07-2013 |
| 20140000535 | METALLURGICAL PLANT WITH EFFICIENT WASTE-HEAT UTILIZATION | 01-02-2014 |
| 20140116361 | Systems and Methods for Heat Recovery Steam Generation at Dual Pressures - Systems for the recovery of heat from hot air exhaust from industrial processes, and the utilization of recovered heat to generate steam at two discrete (high and low) pressures. The systems match steam production with demand. The systems utilize efficient finned tube exchange units made up of modular sections that can be selectively associated with either high or low pressure steam generators. The systems utilize separate steam domes for each of the discrete steam pressures. The steam dome components may be structured apart from the heat exchange components. Each steam dome utilizes its own sensor and control instrumentation to vary the allocation of heat recovered to either or both the high or low pressure steam generator. The two generator subsystems are linked to operate variably according to demand. Monitoring upstream heat and downstream steam requirements allow for automated operation and allocation of recovered heat into the two subsystems. | 05-01-2014 |
| 20140216365 | SYSTEM AND METHOD FOR HEAT RECOVERY STEAM GENERATORS - A system includes a heat recovery steam generator (HRSG) including a plurality of evaporator sections. At least one evaporator section includes a natural circulation evaporator configured to generate a saturated steam, a once-through evaporator configured to generate a first superheated steam, a first superheater configured to receive the saturated steam from the natural circulation evaporator, and a second superheater configured to receive the first superheated steam from the once-through evaporator. | 08-07-2014 |
| 20140305386 | COGENERATION SYSTEM AND METHOD FOR CONTROLLING SAME - The cogeneration system includes: a cogeneration apparatus which generates electric power using supplied fuel gas and supplies the electric power and heat; a heat accumulator which accumulates the heat supplied by the cogeneration apparatus; a controller which controls at least start and stop of the cogeneration apparatus; and a display unit that displays a remaining power generation duration which is a length of time for which the cogeneration apparatus can continue power generation. The controller further calculates the remaining power generation duration based on a remaining heat accumulation capacity which is a difference between (a) a maximum accumulable heat amount which is the amount of heat the heat accumulator is capable of accumulating and (b) a current accumulated heat amount that is the amount of heat currently accumulated in the heat accumulator, and causes the display unit to display the calculated remaining power generation duration. | 10-16-2014 |
| 20150075450 | HEAT RECOVERY FROM A HIGH PRESSURE STREAM - A process for recovering heat from a high pressure stream during hydroprocessing, where one embodiment of the process includes serially introducing a high pressure stream from a hot separator into a first steam generator and a second steam generator; using the first steam generator to generate a medium pressure stream of steam, and then using the medium pressure stream as stripping steam. The process also includes using the second steam generator to generate a low pressure stream of steam, and then using the low pressure stream as stripping steam. | 03-19-2015 |
| 20150090202 | SYSTEM AND METHOD FOR DRUM LEVEL CONTROL IN A DRUM OF A HEAT RECOVERY STEAM GENERATOR - A system includes the HRSG having an economizer disposed along a fluid flow path, and a drum disposed along the fluid flow path downstream of the economizer. The HRSG also includes a drum level control module configured to modulate an amount of the fluid provided to the drum along the fluid flow path and a supplemental control module configured to control an amount of the fluid in a different manner than the drum level control module. The heat recovery steam generator also includes a drum level event controller configured to monitor a rate of change of a level of the fluid in the drum. If the rate of change is over a threshold value, a signal goes to the supplemental control. If the rate of change is less than or equal to the threshold value, the signal goes to the drum level control module. | 04-02-2015 |
| 20150107537 | RECOVERY SYSTEM OF WASTE HEAT FROM FLUE GAS - A recovery system of waste heat from flue gas. The system includes a first heat exchanger and a second exchanger. The first heat exchanger includes a heat absorption section, a heat release section, and a first pipeline. The second heat exchanger includes a second pipeline including an inlet header and an outlet header. The system further includes a third pipeline. The first heat exchanger is disposed at a relatively high temperature side of a flue, the second heat exchanger is disposed at a relatively low temperature side of the flue, and the first heat exchanger and the second heat exchanger are connected by the third pipeline. The heat absorption section and the heat release section are connected by the first pipeline to form a circulation loop; the heat absorption section is disposed in the flue; the heat release section is disposed in the third pipeline. | 04-23-2015 |
| 20150362173 | Multi-Stage Duct Fired Heat Recovery Steam Generator and Methods of Use - A high efficiency multi-stage duct fired heat recovery steam generator (HRSG) is provided to generate steam for use in thermal enhanced oil recovery (EOR) applications. The HRSG is equipped with a plurality of duct burners in series and a plurality of evaporators for transferring heat from the duct burners to the water to generate steam, with at least one evaporator corresponding to each of the duct burners. Each evaporator is arranged downstream from the corresponding duct burner. Hot exhaust gas from a gas turbine (over 1000° F.) is directed to the duct burners in series, allowing further combustion and maximizing thermal efficiency for the HRSG to have a thermal efficiency of at least 92%, and for the exhaust gas exiting the HRSG to a reduced oxygen level of less than 5%. | 12-17-2015 |
| 20160161106 | A SHELL-AND-TUBE APPARATUS FOR HEAT RECOVERY FROM A HOT PROCESS STREAM - A shell-and-tube apparatus ( | 06-09-2016 |
| 20180023806 | WASTE HEAT BOILER | 01-25-2018 |
| 20130269631 | Steam Delivery System for Biomass Processing - The present invention relates to delivery of steam produced by an electrical power generation plant to a lignocellulosic biomass refinery. | 10-17-2013 |
| 20140202400 | WATER COOLED CO BOILER FLOOR WITH SCREEN GAS DISTRIBUTION INLET - A carbon monoxide (CO) boiler or steam generator having a water cooled CO boiler floor with screen gas distribution inlet to enhance distribution of CO gas in a CO boiler. Either the front or rear wall tubes of the steam generator form an integral screen and the tubes continue, forming a membraned, gas tight enclosure. The floor has a “knee” to redirect the incoming waste CO gas up into the integral screen. The screen may be provided with tube erosion shields to prevent erosion of the screen tubes and to control the distribution of waste gas across the plan area of the furnace. | 07-24-2014 |
| 20150136046 | METHOD FOR USING THE EXHAUST GASES FROM PLANTS FOR RAW IRON MANUFACTURE FOR GENERATING STEAM - A method and a system for generating steam using the waste gases from plants for pig iron manufacture: waste gas removed as export gas ( | 05-21-2015 |
| 20160010852 | ENERGY RECOVERY FOR WASTE GAS CAPTURE SYSTEMS | 01-14-2016 |
| 122007000 | Carbon monoxide | 1 |
| 20080236516 | WATER RECIRCULATION SYSTEM FOR BOILER BACKEND GAS TEMPERATURE CONTROL - A water recirculation system for a steam power plant includes a tapoff line which receives water from a downcomer, and an economizer link which receives water from the tapoff line and transports the water to an economizer. | 10-02-2008 |
| 20080289589 | APPARATUS FOR STEAM HEAT RECOVERY FROM MULTIPLE HEAT STREAMS - Disclosed is an apparatus and process for recovering heat from multiple hot process streams without multiplying instrumentation. Each hot process stream is indirectly heat exchanged with a water circuit which leaves and feeds a steam drum. Heat is added to the steam drum through the addition of water heated outside of the steam drum. The heated liquid and vapor water is heated in heat exchangers decoupled from the steam drum. The water circuits are arranged in parallel with each other and feed a single steam drum to provide a steam product of a desired pressure for which only one set of instrumentation is needed. | 11-27-2008 |
| 20090044767 | BOILER ARRANGEMENT - In a boiler, a space is reserved to expand the boiler by increasing the front and rear walls. To expand the boiler, wall additions are added to increase the width of the front and rear walls. After the expansion, the distance between the front and rear walls is substantially the same distance between the front and rear walls before the expansion. | 02-19-2009 |
| 20090050079 | Economizer for a steam generator - An economizer for a heat recovery steam generator utilized to improve the efficiency of the Rankine cycle by preheating the water that flows to the evaporator section. The economizer multi-pass sections include up-flow tubes only. This arrangement greatly reduces thermal stresses on the tubes by ensuring that each individual tube in any fluid-flow pass operates at the same or similar temperature. The design of the invention does this by causing all tubes in any fluid-flow pass to have the same upwards fluid flow direction and similar fluid flow velocity. No unstable backflow (i.e. flow in the reverse direction) occurs in any of the tubes. Heated down-flow tube sections are totally eliminated in this design. Respective jumper pipes are provided to conduct the water from the top of an economizer panel to the bottom of an adjacent panel. | 02-26-2009 |
| 20090071419 | Steam Generator - The invention relates to a steam generator wherein a continuous heating panel of a generator, which is formed from a number of evaporator tubes, and an overheating panel, which is formed from a number of over-heating tubes which are arranged downstream from the evaporator tubes and on the flow side, are arranged in a heating gas channel. According to the invention, a water separating element is integrated into a number of over-flow tubes which are connected on the flow side of one of several evaporator tubes to one or several overheating tubes. | 03-19-2009 |
| 20090241860 | ENHANCED STEAM CYCLE UTILIZING A DUAL PRESSURE RECOVERY BOILER WITH REHEAT - An enhanced steam cycle utilizing a dual pressure recovery boiler with reheat allows a large increase in electrical generation with various turbine cycles while overcoming traditional lower furnace material limitations. A dual pressure designed recovery boiler furnace is provided with a lower furnace and an upper furnace. The lower furnace is operated at a lower temperature to prevent or reduce corrosion of the lower furnace wall tubes caused by the reducing environment. The lower furnace can be either a low pressure natural circulation steam generating (drum) system or economizer. Unlike the lower furnace, the upper furnace is not exposed to a reducing environment and is therefore not as susceptible to severe corrosion rates. The upper furnace is operated at higher temperatures and pressures which permit implementation of higher efficiency reheat steam cycles. The upper furnace thus operates as a high pressure natural circulation steam generating (drum) system, or as a once-through supercritical steam generating system. The dual pressure recovery boiler can thus be coupled to a variety of condensing, non-condensing or a combination of condensing and non-condensing turbine cycles to provide a large increase in electrical generation. | 10-01-2009 |
| 20090260585 | Oxyfuel Combusting Boiler System and a Method of Generating Power By Using the Boiler System - Carbonaceous fuel is combusted with an oxidant gas in a furnace of a boiler system to generate power. Oxidant gas is fed into the furnace for combusting the fuel to produce exhaust gas, the exhaust gas is discharged from the furnace via an exhaust gas channel, a stream of feedwater is conveyed from a final economizer arranged in the exhaust gas channel to evaporating and superheating heat exchange surfaces arranged in the furnace and in the exhaust gas channel for converting the feedwater to superheated steam, the superheated steam is converted in a high-pressure steam turbine for generating power, a first portion of steam is extracted from the high-pressure steam turbine for preheating the feedwater, a second portion of steam is conveyed from the high-pressure steam turbine to reheating heat exchange surfaces arranged in the exhaust gas channel for generating reheated steam, and the reheated steam is expanded in an intermediate pressure steam turbine for generating power. The oxidant gas can be a mixture of substantially pure oxygen and recycled exhaust gas, and the ratio of the first and second portions of steam can be controlled to obtain a desired flue gas temperature in the exhaust gas channel downstream of the final economizer. | 10-22-2009 |
| 20100012051 | Compact, Tiered Sulfur Recovery Unit - A compact, tiered sulfur recovery unit having a burner, a combustion chamber, a reaction chamber, a waste heat boiler and a steam drum. The waste heat boiler is mounted above the reaction chamber, and the steam drum is mounted above the waste heat boiler, resulting in a three-tiered, compact design, requiring only a single platform for space. The reaction chamber comprises a horizontal body and an upright plenum. The reaction chamber includes an inlet for receipt of acid gas (H | 01-21-2010 |
| 20100126434 | INTEGRATED LIME KILM PROCESS - A process and system for recovering waste heat from a kiln used for lime or cement production. The system unifies the kiln, a waste heat recovery and power generation circuit and a dry scrubber for scrubbing the pollutants from the kiln offgas. Essentially, the system employs the boiler component of the waste heat recovery and power generation circuit as a heat exchanger to recover the waste heat from the kiln, which is used to drive the steam turbines. The heat absorption from the latter stage lowers the temperature of the kiln offgas sufficiently for optimum performance from the scrubber. The presence of lime particles in the offgas effectively protects the boiler tube surfaces from corrosion which would occur at optimum scrubber temperatures, and subsequently provides the lime required as a scrubbing medium for the dry scrubber. Further, the efficient scrubbing allows for the use of any fuel for firing the kiln inclusive of high sulphur content compounds. A process for effecting the technology is also provided. | 05-27-2010 |
| 20100139581 | VESSEL FOR COOLING SYNGAS - A vessel for cooling syngas comprising | 06-10-2010 |
| 20100192877 | Sustainable Waste Heat Management System - A self-contained waste heat recovery system for a commercial oven provides circulating an energy source to an oven heating system. The oven heating system recovers heat from an oven stack or downstream of oxidizer if used and distributes the heat to bakery systems such as proofers, tray washers, process water heating and other points of use. The system features secondary loops to ensure constant flow of the energy source throughout the system optimizing energy savings. | 08-05-2010 |
| 20110041783 | Steam Generator - A steam generator of a technical plant, in particular a power plant, comprising a heating gas passage enclosed by a gas-tight enclosing wall, wherein the heating gas passage has a number of heating surfaces through which a flow medium can flow, is to ensure especially reliable cleaning of the heating gas flowing off from the heating gas passage at an especially low design and production cost. To this end, provision is made according to the invention for at least one of the heating surfaces to be at least partly provided with a catalytic coating on its side facing the heating gas. | 02-24-2011 |
| 20110048344 | WATER HEATING APPARATUS - A water heating apparatus includes: an exhaust gas passage through which an exhaust gas from a burner flows; a water flow passage through which water flows; a first heat exchanger configured to exchange heat between sensible heat contained in the exhaust gas and water flowing through a heat exchanger tube, and arranged at upstream side of the exhaust gas passage and downstream side of the water flow passage; a second heat exchanger configured to exchange heat between latent heat contained in the exhaust gas and water flowing through a heat exchanger tube, and arranged at downstream side of the exhaust gas passage and upstream side of the water flow passage; and a bypass pipe arranged in the water flow passage in such a position as to bypass the second heat exchanger and designed to allow a at least the predetermined minimum amount of water required for a burner combustion operation to flow therethrough into the first heat exchanger. | 03-03-2011 |
| 20110083620 | Waste Heat Recovery System and Method Thereof - A waste heat recovery system comprises a steam generator, a processor, a first heat exchanger, and a second heat exchanger. The steam generator generates an original steam using water. The first heat exchanger condensates the first steam and emit water and a second steam from the processor. The second heat exchanger condensates the second steam from the first heat exchanger. The second heat exchanger condensates the second steam from the first heat exchanger leaving water only. The water from the first heat exchanger and the second heat exchanger may be guided into the steam generator or into the first heat exchanger. The second heat exchanger comprises one or more pressure relief valve. The pressure relief valve operates when inner pressure of the second heat exchanger exceeds above a predetermined value. | 04-14-2011 |
| 20110162594 | Waste Heat Steam Generator - A waste heat steam generator including evaporator tubes is provided. The evaporator tubes are connected in parallel on the flow medium side, a plurality of overheating tubes are mounted downstream of the evaporator tubes using a water separation system. The water separation system includes water separation elements, each water separation element being respectively mounted downstream of the plurality of evaporator tubes and/or upstream of a plurality of overheating tubes. Each water separating element includes an inlet pipe which is respectively connected upstream to the evaporator tubes, the inlet pipe extending into a water evacuation pipe when seen in the longitudinal direction. A plurality of outflow pipes branch off in the transitional area, the pipes being connected to an inlet collector of the overheating tubes which are respectively connected downstream. A distribution element is arranged on the steam side between the respective water separating element and the inlet collector. | 07-07-2011 |
| 20110203536 | Continuous steam generator - A continuous steam generator is provided. The continuous steam generator includes a combustion chamber having a number of burners for fossil fuels, downstream of which a vertical gas duct is mounted, on the hot gas side, in an upper region above a horizontal gas duct. The outside wall of the combustion chamber is formed, in a lower region, from evaporation tubes welded together in a gas-tight manner and mounted upstream of a water separator system, on the flow medium side, and in an upper region, from superheater tubes welded together in a gastight manner and mounted downstream of the water separator system on the flow medium side. The boundary between the regions of the evaporation tubes and the superheater tubes is essentially horizontal around the combustion chamber, in a region of the bottom of the horizontal gas duct. | 08-25-2011 |
| 20110214624 | METHOD AND DEVICE FOR PRODUCING A GASEOUS MEDIUM COMPRISING STEAM - The invention relates to a method for producing a gaseous medium comprising steam, said steam being produced from a first fluid medium separated from the exhaust gas from combustion of a fuel in a steam generating step, said fuel being provided for burning for providing energy for heating said first fluid medium, comprising the steps of mixing the steam thus produced with exhaust gas from combustion of said fuel; and supplying at least one chemical substance different from air and water to said steam and exhaust gas mixture. The invention also relates to a device for producing a gaseous medium comprising steam. | 09-08-2011 |
| 20110239961 | ONCE-THROUGH VERTICAL EVAPORATORS FOR WIDE RANGE OF OPERATING TEMPERATURES - An evaporator for steam generation is presented. The evaporator includes a plurality of primary evaporator stages and a secondary evaporator stage. Each primary stage includes one or more primary arrays of heat transfer tubes, an outlet manifold coupled to the arrays, and a downcomer coupled to the manifold. Each of the primary arrays has an inlet for receiving a fluid and is arranged transverse to a flow of gas through the evaporator. The gas heats the fluid flowing through the arrays to form a two phase flow. The outlet manifold receives the two phase flow from the arrays and the downcomer distributes the flow as a component of a primary stage flow. One or more of the plurality of primary evaporator stages selectively form the primary stage flow from respective components of the two phase flow, and provide the primary stage flow to inlets of the secondary evaporator stage. | 10-06-2011 |
| 20110315094 | Continuous Evaporator - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium can flow from bottom to top, and a second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium can flow from bottom to top. The second steam generator tubes are designed in such a manner that the average mass flow density which can be controlled in the full load operation does not fall below a predetermined minimum mass flow density in the second steam generator tubes. | 12-29-2011 |
| 20110315095 | CONTINUOUS EVAPORATOR - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium can flow from bottom to top, and a second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium can flow from bottom to top. The first steam generator tubes are designed in such a manner that the average mass flow density which may be controlled in the full load operation does not fall below the predetermined minimum mass flow density in the first steam generator tubes. | 12-29-2011 |
| 20120017853 | WASTE HEAT BOILER - Waste heat boiler ( | 01-26-2012 |
| 20120024241 | Continuous evaporator - A continuous evaporator for a horizontally constructed waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface having a plurality of essentially vertically arranged first steam generator tubes through which a flow medium may flow from bottom to top, and another second evaporator heating surface which is mounted downstream of the first evaporator heating surface on the flow medium side. The second evaporator heating surface includes a plurality of additional essentially vertically arranged second steam generator tubes through which a flow medium may flow from bottom to top. An aperature system is arranged downstream of the second steam generator tubes on the flow medium side. | 02-02-2012 |
| 20120073520 | CONTINUOUS EVAPORATOR - A continuous evaporator for a horizontal waste heat steam generator is provided. The continuous evaporator includes a first evaporator heating surface that has a number of essentially vertically arranged first steam generating tubes wherein the circulation takes place from the bottom to the top, and another second evaporator heating surface located downstream of the first evaporator heating surface on the side of the flow medium, the second evaporator heating surface including a number of other essentially vertically arranged second steam generating tubes wherein the circulation takes place from the bottom to the top is provided. In order to provide a continuous evaporator with an especially simple structure and an especially long service life, a number of second steam generator tubes have an inner profiled element. | 03-29-2012 |
| 20120180739 | CASCADING ONCE THROUGH EVAPORATOR - A steam generator includes a substantially horizontal gas conduit ( | 07-19-2012 |
| 20120204817 | CONFIGURATIONS AND METHODS OF GENERATING LOW-PRESSURE STEAM - Low-pressure steam for a steam consuming device, and particularly a steam reboiler, is generated at the steam consumption pressure to maximize the heat recovery from a utility fuel and/or waste heat source. Most preferably, steam is generated at the lowest possible pressure by fluidly coupling the steam generator to the steam consuming device (e.g., by integrating the condensate drum with the steam drum). Therefore, it should be appreciated that the steam generator pressure in such configurations and methods will ride on the reboiler pressure. | 08-16-2012 |
| 20120234263 | PROCESSES AND SYSTEMS FOR GENERATING STEAM FROM MULTIPLE HOT PROCESS STREAMS - Embodiments of processes and an apparatus for generating steam are provided. The process comprises the steps of indirectly heating water in a first thermosyphon heat exchanger with a first hot stream to form a first stream of heated water comprising steam. The first stream of heated water is fluidly communicated to a first steam drum via natural circulation. Water is indirectly heated in a second thermosyphon heat exchanger with a second hot stream from the process unit to form a second stream of heated water comprising steam. The second stream of heated water is fluidly communicated to the first steam drum via natural circulation. Steam is recovered from the first steam drum. | 09-20-2012 |
| 20120240871 | METHOD AND CONFIGURATION TO REDUCE FATIGUE IN STEAM DRUMS - A heat recovery steam generator that includes a first steam drum for receiving a flow of water and steam from an evaporator. The first steam drum is adapted to provide the flow of water and steam to a second steam drum. The second steam drum is in fluid communication with the first steam drum and receives the flow of water and steam from the first steam drum and separates steam from the flow of water and steam to form a separated steam. There is a steam flow outlet positioned in the second steam drum, the steam flow outlet adapted to release the separated steam from the second steam drum. | 09-27-2012 |
| 20120247406 | METHOD OF CONTROLLING DRUM TEMPERATURE TRANSIENTS - An evaporator system comprises an evaporator; a drum; and a pump that are in fluid communication with each other. The pump is operative to create a temporary pressure gradient during start-up of an evaporator system and transport a fluid from the evaporator to the drum prior to the fluid reaching its boiling point in the evaporator. Following the fluid reaching its boiling point in the evaporator, the fluid naturally circulates in the evaporator system. | 10-04-2012 |
| 20130047938 | METHOD FOR OPERATING A STEAM GENERATOR - A method for operating a steam generator comprising a combustion chamber having a plurality of evaporator heating surfaces which are connected in parallel on the flow medium side is provided. An object is to provide a steam generator which has a particularly long service life and which is particularly reliable. For this purpose, a flow medium is introduced into an inlet of a first evaporator heating surface at a temperature which is lower than the temperature of the flow medium introduced into the inlet of a second evaporator heating surface. | 02-28-2013 |
| 20130125842 | METHODS AND SYSTEMS FOR HEATING AND MANIPULATING FLUIDS - Systems and methods are provided for heating and manipulating a fluid to heat the fluid, evaporate water from the fluid, concentrate the fluid, separate the fluid into fractions; and/or pasteurize the fluid, comprising a closed-loop heating subsystem coupled to a primary fluid-to-fluid heat exchanger, and one or more fluid manipulation subsystems also coupled to the primary fluid-to-fluid heat exchanger. | 05-23-2013 |
| 20130180475 | WASTE HEAT BOILER - A waste heat boiler has heat exchange tubes for indirect heat exchange of a relatively hot process gas and a cooling media, and a by-pass tube for by-passing a part of the process gas; a process gas collector collects and mixes a part of the heat exchanged process gas and at least a part of the by-passed process gas before the mix is lead via a control valve to the process gas outlet of the waste heat boiler together with the rest of the heat exchanged process gas. | 07-18-2013 |
| 20130291808 | METHOD FOR UTILIZING THERMAL ENERGY OF PRODUCT GASES IN A BTL PLANT - The invention for utilizing thermal energy of gases generated in a BtL plant. A feature of the invention is that the thermal energy of discharge gas streams generated in the BtL plant is used for driving various compressor machineries and/or electricity generation, whereby the plant can operate as a stand-alone facility. | 11-07-2013 |
| 20130291809 | DOMESTIC COMBINED HEAT AND POWER SYSTEM - The present invention relates to a domestic combined heat and power system, and the domestic combined heat and power system includes a power unit, a heat-storage tank which receives waste heat of the power unit and stores heat in direct water, and a main heat exchanger which is connected to the heat-storage tank and is heated by a burner so as to use the water as hot water or heating water, in which a waste-heat heat exchanger filled with a heat-transfer medium is installed between the power unit and the heat-storage tank such that a waste-heat pipe of the power unit is arranged in the form of a coil at one side inside the waste-heat heat exchanger, and a heat-storage pipe of the heat-storage tank is arranged in the form of a coil at the other side, so that waste heat of the power unit is indirectly heat exchanged to the heat-storage tank through the heat-transfer medium; in which hot-water piping coming out from the heat-storage tank is arranged so as to be indirectly heat exchanged via a hot-water heat exchanger, and heating piping coming out from the heat-storage tank is connected to the heating water-heat exchanger, and a part of the heating piping again comes out and is arranged so as to be indirectly heat exchanged via the hot-water heat exchanger. According to the present invention, since a heat-exchange method for the power unit and the heat-storage tank is changed into an indirect heat-exchange method, costs and waste of energy consumption are reduced, and there is sharing of functions that are duplicated across the heat-storage tank and a boiler such that efficient system design is possible, variability and compatibility are enhanced, and the system volume is reduced such that installation space may be more effectively used. | 11-07-2013 |
| 20140000535 | METALLURGICAL PLANT WITH EFFICIENT WASTE-HEAT UTILIZATION | 01-02-2014 |
| 20140116361 | Systems and Methods for Heat Recovery Steam Generation at Dual Pressures - Systems for the recovery of heat from hot air exhaust from industrial processes, and the utilization of recovered heat to generate steam at two discrete (high and low) pressures. The systems match steam production with demand. The systems utilize efficient finned tube exchange units made up of modular sections that can be selectively associated with either high or low pressure steam generators. The systems utilize separate steam domes for each of the discrete steam pressures. The steam dome components may be structured apart from the heat exchange components. Each steam dome utilizes its own sensor and control instrumentation to vary the allocation of heat recovered to either or both the high or low pressure steam generator. The two generator subsystems are linked to operate variably according to demand. Monitoring upstream heat and downstream steam requirements allow for automated operation and allocation of recovered heat into the two subsystems. | 05-01-2014 |
| 20140216365 | SYSTEM AND METHOD FOR HEAT RECOVERY STEAM GENERATORS - A system includes a heat recovery steam generator (HRSG) including a plurality of evaporator sections. At least one evaporator section includes a natural circulation evaporator configured to generate a saturated steam, a once-through evaporator configured to generate a first superheated steam, a first superheater configured to receive the saturated steam from the natural circulation evaporator, and a second superheater configured to receive the first superheated steam from the once-through evaporator. | 08-07-2014 |
| 20140305386 | COGENERATION SYSTEM AND METHOD FOR CONTROLLING SAME - The cogeneration system includes: a cogeneration apparatus which generates electric power using supplied fuel gas and supplies the electric power and heat; a heat accumulator which accumulates the heat supplied by the cogeneration apparatus; a controller which controls at least start and stop of the cogeneration apparatus; and a display unit that displays a remaining power generation duration which is a length of time for which the cogeneration apparatus can continue power generation. The controller further calculates the remaining power generation duration based on a remaining heat accumulation capacity which is a difference between (a) a maximum accumulable heat amount which is the amount of heat the heat accumulator is capable of accumulating and (b) a current accumulated heat amount that is the amount of heat currently accumulated in the heat accumulator, and causes the display unit to display the calculated remaining power generation duration. | 10-16-2014 |
| 20150075450 | HEAT RECOVERY FROM A HIGH PRESSURE STREAM - A process for recovering heat from a high pressure stream during hydroprocessing, where one embodiment of the process includes serially introducing a high pressure stream from a hot separator into a first steam generator and a second steam generator; using the first steam generator to generate a medium pressure stream of steam, and then using the medium pressure stream as stripping steam. The process also includes using the second steam generator to generate a low pressure stream of steam, and then using the low pressure stream as stripping steam. | 03-19-2015 |
| 20150090202 | SYSTEM AND METHOD FOR DRUM LEVEL CONTROL IN A DRUM OF A HEAT RECOVERY STEAM GENERATOR - A system includes the HRSG having an economizer disposed along a fluid flow path, and a drum disposed along the fluid flow path downstream of the economizer. The HRSG also includes a drum level control module configured to modulate an amount of the fluid provided to the drum along the fluid flow path and a supplemental control module configured to control an amount of the fluid in a different manner than the drum level control module. The heat recovery steam generator also includes a drum level event controller configured to monitor a rate of change of a level of the fluid in the drum. If the rate of change is over a threshold value, a signal goes to the supplemental control. If the rate of change is less than or equal to the threshold value, the signal goes to the drum level control module. | 04-02-2015 |
| 20150107537 | RECOVERY SYSTEM OF WASTE HEAT FROM FLUE GAS - A recovery system of waste heat from flue gas. The system includes a first heat exchanger and a second exchanger. The first heat exchanger includes a heat absorption section, a heat release section, and a first pipeline. The second heat exchanger includes a second pipeline including an inlet header and an outlet header. The system further includes a third pipeline. The first heat exchanger is disposed at a relatively high temperature side of a flue, the second heat exchanger is disposed at a relatively low temperature side of the flue, and the first heat exchanger and the second heat exchanger are connected by the third pipeline. The heat absorption section and the heat release section are connected by the first pipeline to form a circulation loop; the heat absorption section is disposed in the flue; the heat release section is disposed in the third pipeline. | 04-23-2015 |
| 20150362173 | Multi-Stage Duct Fired Heat Recovery Steam Generator and Methods of Use - A high efficiency multi-stage duct fired heat recovery steam generator (HRSG) is provided to generate steam for use in thermal enhanced oil recovery (EOR) applications. The HRSG is equipped with a plurality of duct burners in series and a plurality of evaporators for transferring heat from the duct burners to the water to generate steam, with at least one evaporator corresponding to each of the duct burners. Each evaporator is arranged downstream from the corresponding duct burner. Hot exhaust gas from a gas turbine (over 1000° F.) is directed to the duct burners in series, allowing further combustion and maximizing thermal efficiency for the HRSG to have a thermal efficiency of at least 92%, and for the exhaust gas exiting the HRSG to a reduced oxygen level of less than 5%. | 12-17-2015 |
| 20160161106 | A SHELL-AND-TUBE APPARATUS FOR HEAT RECOVERY FROM A HOT PROCESS STREAM - A shell-and-tube apparatus ( | 06-09-2016 |
| 20180023806 | WASTE HEAT BOILER | 01-25-2018 |
| 20130269631 | Steam Delivery System for Biomass Processing - The present invention relates to delivery of steam produced by an electrical power generation plant to a lignocellulosic biomass refinery. | 10-17-2013 |
| 20140202400 | WATER COOLED CO BOILER FLOOR WITH SCREEN GAS DISTRIBUTION INLET - A carbon monoxide (CO) boiler or steam generator having a water cooled CO boiler floor with screen gas distribution inlet to enhance distribution of CO gas in a CO boiler. Either the front or rear wall tubes of the steam generator form an integral screen and the tubes continue, forming a membraned, gas tight enclosure. The floor has a “knee” to redirect the incoming waste CO gas up into the integral screen. The screen may be provided with tube erosion shields to prevent erosion of the screen tubes and to control the distribution of waste gas across the plan area of the furnace. | 07-24-2014 |
| 20150136046 | METHOD FOR USING THE EXHAUST GASES FROM PLANTS FOR RAW IRON MANUFACTURE FOR GENERATING STEAM - A method and a system for generating steam using the waste gases from plants for pig iron manufacture: waste gas removed as export gas ( | 05-21-2015 |
| 20160010852 | ENERGY RECOVERY FOR WASTE GAS CAPTURE SYSTEMS | 01-14-2016 |
| 122008000 | Water firebox | 2 |
| 122009000 | Water tube type | 2 |
| 20090260582 | Boiler Furnace To Avoid Thermal NOx - A boiler furnace avoids NOx and increases thermal efficiency with a small boiler. The boiler furnace has an outer water wall and an inner water wall with flared top and bottom portions. | 10-22-2009 |
| 20100077968 | OXY/FUEL COMBUSTION SYSTEM HAVING COMBINED CONVECTIVE SECTION AND RADIANT SECTION - A heat transfer system having a a radiant source, a first heat exchanger configured to permit a first fluid to flow therethrough, and a thermal shield configured to provide controlled radiative heat from the radiant source to the first exchanger. The radiant source is a flame. The thermal shield is a second heat exchanger configured to permit a second fluid to flow therethrough or a non-contact thermal shield fabricated from a material arranged to provide controlled radiative heat exposure from the radiant source to the first exchanger. Oxy/coal combustion systems are also disclosed. | 04-01-2010 |
| 122006000 | Water-cooled walls | 2 |
| 20100170453 | STEAM GENERATION PROCESS FOR ENHANCED OIL RECOVERY - The present invention is a system and method for steam production for extraction of heavy bitumen. The method includes mixing fuel and oxidizing gases, combusting the mixture, mixing combustion gas with water containing solids and organics, separating solids, using heat from the separated gas to produce distilled water, recycling the distillation facility brine with the combustion gas and removing solids thereof, generating steam from the distilled water and injecting the steam through an injection well or using it above ground for oil recovery. The system includes a combustion boiler, a direct contact steam generator, a gas-solids separator, and a heat exchanger with a water treatment facility like a distillation facility. The water feed of the present invention can be water separated from produced oil and/or low quality water salvaged from industrial plants, such as refineries and tailings as make-up water. | 07-08-2010 |
| 20110197831 | Pulverized Coal Burning Boiler - A pulverized coal burning boiler is provided, which reduces an air-excess ratio thereby to reduce the emission of unburned contents such as CO. The pulverized coal burning boiler includes a pulverized coal feed measuring device for measuring the feeding rates of the pulverized coal to be conveyed through coal feeding pipes, individually, and a control device for calculating the burning air feeding rates to match the pulverized coal feeding rates thereby to send a control command signal to burning air feed adjusting device, so that a burner air ratio set by a burner air ratio setting device may be kept on the basis of both the pulverized coal feeding rate, which is measured by the pulverized coal feed measuring device, and the burning air feeding rate, which is measured by the burning air feeding rate measuring device and fed to a pulverized coal burner connected to the coal feeding pipes. | 08-18-2011 |
| 20120137990 | Systems and Methods for Liquid Vaporizers and Operations Thereof - A vaporizer including injection lances disposed within a vessel for injecting a substance such as liquid or heating media, into the vessel. The lances are configured for removal from the vessel through at least one of multiple orifices in the wall of the vessel. The orifices are configured to have lances extending through them into the vessel. The configuration of the vaporizer facilitates performing maintenance or making changes to the lances without the need to take the vaporizer out of service. | 06-07-2012 |
| 20120266826 | SYSTEM, METHOD AND APPARATUS FOR THERMALLY CONDUCTIVE REFRACTORY TILES FOR WASTE TO ENERGY BOILER WALLS - A refractory tile has a body formed from a refractory material. The body has a front side that defines a front plane, and a rear side that defines a rear plane that is opposite the front plane. A concave portion is formed in the rear side and is contoured to a wall of boiler tubes. The body also has an inclined portion extending from the front plane to the rear plane. The inclined portion is formed at an acute angle with respect to the rear plane. The inclined portion defines an edge at an intersection with the rear plane. The edge directly contacts the wall without a backfill material. The tiles form an array of upper refractory tiles located only on an uppermost row of the array above lower refractory, against the bare wall of boiler tubes. | 10-25-2012 |
| 20130269630 | STEAM GENERATOR FILM COOLING USING PRODUCED WATER - An exemplary steam generator assembly includes a wall. Produced water acts as film cooling to at least a portion of the wall. | 10-17-2013 |
