Class / Patent application number | Description | Number of patent applications / Date published |
122001000 | PLANTS | 41 |
20080210178 | SELECTIVE CLEANING OF HEAT EXCHANGING DEVICES IN THE BOILER OF A COMBUSTION PLANT - A boiler of a combustion plant has at least one heat exchanging device which can be traversed by a medium from an inlet to an outlet and is held in the interior of the boiler by means of at least one suspension device, wherein means for determining the temperature of the medium are provided at least at the inlet or at the outlet, and the at least one suspension device has means for determining the weight of the at least one heat exchanging device. Also proposed are a cleaning control device, a cleaning method and a method for operating a combustion plant which permit a considerable reduction in the cleaning expenditure, so that maintenance costs can be kept low. | 09-04-2008 |
20080257282 | Fossil-Fuel Heated Continuous Steam Generator - The invention relates to a fossil-energy heated continuous steam generator, whereby the at least one combustion chamber, viewed in the flow direction of the hot gases, is divided into at least two throughflow segments, formed by evaporator heating surfaces, whereby the evaporator heating surfaces each comprise steam generation tubes welded to each other in a gastight manner and pressurized in parallel with a flow medium. According to the invention, said generator is suitable for operation with high fresh steam parameters, such as for example, steam temperatures of approximately 700° C., with a simple construction and particularly simple assembly, whereby a throughflow segment, arranged after the first through flow segment, viewed in the direction of flow of the hot gases, forms the first evaporator stage for the flow medium, such that the injection of particularly cold flow medium can occur in the region of maximum heating. | 10-23-2008 |
20080302314 | Solar concentration plant for the production of superheated steam - A solar concentration plant which uses water/steam as a heat-carrying fluid, in any thermodynamic cycle or system for the exploitation of process heat, which is comprised of an evaporation subsystem, where saturated steam is produced under the conditions of pressure of the system, and a superheater subsystem through which the steam reaches the required conditions of pressure and temperature at the turbine inlet, and in which an attemperation system ( | 12-11-2008 |
20090025658 | BLACK PLANT STEAM FURNACE INJECTION - A system and method for quickly cooling and de-pressurizing a boiler arrangement in the event of a plant power loss, a.k.a. a black plant condition. A steam discharge system injects steam from the steam/water circuit into the furnace, thereby both cooling components of the boiler arrangement and reducing pressure in the steam/water circuit. This reduces or eliminates the additional cost associated with providing extra capacity in a steam drum and/or an independently powered boiler water pump. The system and method is particularly useful for quickly cooling the U-beams of a circulating fluidized bed (CFB) boiler during a black plant condition. In application to boiler arrangements with a selective non-catalytic reduction (SNCR) system employing steam as a carrier for a NO | 01-29-2009 |
20090107422 | Direct fired heater utilizing particulates as a heat transfer medium - This invention relates to a means of heating a process fluid to elevated temperature thru use of heat resistant particulates as a heat transfer medium. Down-ward flowing particulates, enter the top of a refractory lined containment vessel, and are heated to elevated temperature by direct contact with an up-flowing stream of hot combustion products, generated by side wall burners located at the bottom of the containment vessel. The heated particulate stream is separated from the combustion gas stream at the bottom of the containment vessel and the spent combustion gas is directed to a downstream tubular convection section for heat recovery and for further processing to recover vaporized process fluid, as in the case of liquid feed preheating for delayed coking, or for feed preheating only, as in the case of gas cracking. The particulate stream is conveyed to the bottom of a second refractory lined containment vessel, by an incoming stream of the process fluid to be heated, and is raised to the desired outlet temperature by direct contact with the particulate stream. The particulates are separated from the process fluid in a low velocity region located in an expanded section at the top of the second vessel, and the process fluid is processed further in downstream equipment. Spent particulates are returned to the top of the first vessel, completing the continuity cycle. | 04-30-2009 |
20090188448 | Boiler Apparatus For Combusting Processed Agriculture Residues (PAR) And Method - An apparatus that extracts energy from processed agriculture residue (PAR) such as dried distiller grains or rapeseed as a biomass fuel having about 12% by weight or less moisture combusted in a vertically elongated combustion chamber having at least one suspension burner that projects a flame down a longitudinal axis of combustion chamber for transferring heat to heat collection surface located radially from the flame, an exhaust opening vertically spaced from a distal end of the flame containment portion and vertically spaced lower of a substantial majority of the heat collection surface, and a temperature modulator that supplies a cooling air. A method of extracting energy from PAR fuel is disclosed. | 07-30-2009 |
20090320771 | IONIC LIQUID MEDIUMS FOR HOLDING SOLID PHASE PROCESS GAS PRECURSORS - Ionic fluid mixtures are described that include an ionic liquid and a solid-phase material. The ionic liquid and the solid-phase material are selected to convert the solid-phase material into a gas phase material at a temperature that is lower than a conversion of the ionic liquid into a gas phase ionic material. In addition, methods of supplying a gaseous precursor to an application are described. These methods include providing a mixture of an ionic liquid and a solid-phase starting material, heating the mixture to a temperature that vaporizes at least a portion of the solid-phase starting material into the gaseous precursor, and transporting the gaseous precursor from the mixture to the application that utilizes the gaseous precursor. | 12-31-2009 |
20100236501 | REHEAT BOILER AND GAS TEMPERATURE CONTROLLING METHOD OF REHEAT BOILER - A reheat boiler according to the present invention includes a main boiler configured to make combustion gas originating from combustion in a burner flow from a furnace ( | 09-23-2010 |
20110197828 | Power Generation Using Water Pressure - Systems are disclosed that use water pressure to generate power. The systems can include a chamber having an inlet conduit and an outlet conduit that has a valve configured to regulate an outlet flow of water through the outlet conduit. A reciprocating element can be disposed within the chamber, such that the reciprocating element is moved as a function of a pressure of an inlet flow of water flowing through the inlet conduit. A generator can be coupled to the reciprocating element, such that power is generated as a function of the reciprocating element's movement. | 08-18-2011 |
20110315093 | FLUID HEATING SYSTEM, FLUID HEATING METHOD, FLUID HEATING CONTROL SYSTEM, CONTROL APPARATUS, AND CONTROL METHOD - When using a plurality of heaters such as heat pump units, capacity is properly distributed according to the required capacity, thereby enabling highly efficient operation of a hot water system. To achieve this, a control apparatus determines the heating capacity of each of the heat pump units in a way that the total heating capacity of the heat pump units reaches the heating capacity required in the hot water system as a whole, and further in a way that the total COP (coefficient of performance) of the heat pump units satisfies predetermined condition. The control apparatus controls each of regulating valves in a way that the heating capacity of each of the heat pump units reaches the above determined heating capacity. | 12-29-2011 |
20120017848 | METHOD AND APPARATUS FOR VAPORIZING LIQUID CHLORINE CONTAINING NITROGEN TRICHLORIDE - A method of safely vaporizing liquid chlorine containing high concentrations of nitrogen trichloride contaminant from a chloralkali plant. In a vertical plug-flow vaporizer having an upward flow direction, a stream of liquid chlorine containing nitrogen trichloride is received. A gas such as air, nitrogen or chlorine gas is introduced into the liquid stream upstream of the boiling zone of the vaporizer to induce a flow regime, for example annular flow or mist flow, that prevents a mass accumulation of nitrogen trichloride in the vaporizer. The liquid chlorine containing nitrogen trichloride is vaporized. The resulting gas stream may be processed to destroy the nitrogen trichloride and recycled to the chlorine production train. | 01-26-2012 |
20130042824 | HYDROMETHANATION OF A CARBONACEOUS FEEDSTOCK - The present invention relates to processes for hydromethanating a carbonaceous feedstock to a methane product stream and electrical power, in which heat energy from the hot methane-enriched synthesis gas is used to generate a dry saturated steam stream, the dry saturated steam stream is converted into a superheated steam stream via pressure drop for feeding into the hydromethanation reactor to satisfy the steam demand of the hydromethanation reaction, and heat generated from a downstream gas methanation processing is recovered to produce a superheated process steam stream which is used to generate the electric power. | 02-21-2013 |
20130247845 | HEAT RECOVERY AND UTILIZATION SYSTEM - This invention provides a heat recovery and utilization system for efficiently utilizing heat recovered from boiler exhaust gas with a heat recovery unit without any complicated equipment or high operation costs. The heat recovery and utilization system includes: a boiler for electricity generation; a heat recovery unit for recovering heat from exhaust gas of the boiler; a heat exchanger for using heat recovered with the heat recovery unit as heat source for equipment other than for electricity generation; a heat accumulator for accumulating heat source for the equipment other than for electricity generation; and a heat medium circulation line in which heat medium circulates between the heat recovery unit and the heat exchanger to exchange the heat recovered with the heat recovery unit with the heat exchanger. Upon startup of the system, the heat exchanger preheats the heat recovery unit with heat source accumulated in the heat accumulator. | 09-26-2013 |
20140060459 | HEAT RECOVERY SYSTEM AND HEAT RECOVERY METHOD - A heat recovery system includes a preheater ( | 03-06-2014 |
20090013941 | TRI-SECTOR REGENERATIVE OXIDANT PREHEATER FOR OXY-FIRED PULVERIZED COAL COMBUSTION - A tri-sector regenerative oxidant preheater apparatus, method and arrangement for utilization with oxy-fired pulverized coal combustion power plants. The preheater includes a stationary housing and a rotor rotatably mounted in the housing. Sector plates are located at the axial ends of the rotor and divide the preheater into a flue gas sector, two primary oxidant sectors, and a secondary oxidant sector interposed between the two primary oxidant sectors. A primary oxidant fan is located downstream of the preheater to create a negative environment in the primary oxidant sectors. During operation of the preheater, the environments of the two primary oxidant sectors and the flue gas sector are at about the same negative pressure, and thus there is very limited leakage between the oxidant side and the flue gas side of the preheater. The environment of the secondary oxidant sector is at a positive pressure and leakage to the negative environment of the primary oxidant sectors will be that of secondary oxidant to primary oxidant with no loss secondary oxidant to the gas side of the preheater. | 01-15-2009 |
20120060774 | PREHEATER FOR COMBUSTION AIR, AND A POWER PLANT - A preheating device for combustion air in a boiler. First heat exchanger structures fitted in a flue gas duct heat primary air. A first air supply area in the wall of the flue gas duct supplies air to be heated to the first heat exchanger structures. Second heat exchanger structures fitted in a flue gas duct heat secondary air. A second air supply area in the wall of the flue gas duct supplies air to be heated to the second heat exchanger structures. The first air supply area is opposite the second air supply area. Also a power plant. | 03-15-2012 |
20130192540 | SYSTEM FOR COMBINED FLUE GAS HEAT RECOVERY AND DUST PRECIPITATION IMPROVEMENT AS RETROFIT SOLUTION FOR EXISTING COAL-FIRED POWER STATIONS - A power plant is suggested with an additional heat transfer between the flue gas that flows through a flue gas line ( | 08-01-2013 |
20130239909 | ARRANGEMENT STRUCTURE SUITABLE FOR INVERTED PULVERIZED COAL BOILER WITH ULTRA-HIGH STEAM TEMPERATURE STEAM PARAMETERS - The disclosure provides an arrangement structure suitable for an inverted pulverized coal boiler with ultra-high steam temperature steam parameters, including a hearth, wherein the hearth is communicated with a middle uplink flue, and the top of the middle uplink flue is communicated with that of a tail downlink flue. In the arrangement structure suitable for an inverted pulverized coal boiler with ultra-high steam temperature steam parameters, the hearth is connected with the middle uplink flue by a hearth outlet horizontal flue at the bottom, so that the high-temperature gas at the hearth outlet is drained to a low elevation and then flows upwards through the middle uplink flue; a final heating surface may be arranged at the low position of the hearth outlet horizontal flue and the middle uplink flue so as to reduce the length of the high-temperature steam pipeline between the final heating surface and the steam turbine, lower the manufacturing cost of the boiler as well as the frication and radiation loss of the pipe, improve the efficiency of the power generating unit and make the power generating unit possible to adopt ultra-high steam temperature steam parameters and/or double reheat system. | 09-19-2013 |
20080223315 | System and Method for Zero Emissions, Hydrogen Fueled Steam Generator - As we move towards a hydrogen economy or use hydrogen as an energy carrier, the need to get heat energy and steam out of the hydrogen is arising more frequently. This invention addresses that need without the atmospheric pollutants which would result from burning carbon based fuels or hydrogen freely in the air. Presented is an invention which has very high overall efficiency and generates no oxides of carbon and nearly zero nitrogen oxide compounds. The generated steam can be used for comfort heating, process heating, electric generation and other common applications requiring steam. The invention can also be used for generation of hot water. The process of steam generation is accomplished by precisely metering the mixing and oxidation of hydrogen and oxygen under controlled conditions. The result of this oxidation reaction is simply only water and heat, which are used to generate steam. | 09-18-2008 |
20100251975 | ECONOMICAL USE OF AIR PREHEAT - An economical heat recovery system [ | 10-07-2010 |
20120037097 | HIGH EFFICIENCY FEEDWATER HEATER - A feedwater heater ( | 02-16-2012 |
20130312671 | APPARATUS AND CONTROL METHOD FOR A HYBRID TANKLESS WATER HEATER - An on demand tankless water heater system that is capable of quickly delivering water within a desired temperature range. The tankless water heater provides a hybrid heating method that contains a primary heating system and a secondary heating system disposed in a buffer tank that cooperate to facilitate control of output water temperature during water usage. A pressure differential switch detects low flow demand and allows the secondary heating system to provide immediate heating to the water. This secondary heating system provides a faster temperature response and fine tuning of output water temperature. | 11-28-2013 |
20150114318 | MINIMIZING FOULING IN STEAM ASSISTED OIL PRODUCTION - Methods and systems generate steam for heavy oil recovery operations, wherein fouling is limited with the use of wire matrix turbulators in tubes with tendencies to foul. | 04-30-2015 |
20160025331 | CONDENSATE PREHEATER FOR WASTE HEAT STEAM GENERATOR - A condensate preheater for a waste-heat steam generator, including condensate preheater heating surfaces, around which exhaust gas of a gas turbine flows in operation in order to heat up water flowing in the condensate preheater heating surfaces, wherein a respective heat transfer coefficient of the condensate preheater heating surfaces is selected such that a surface temperature of the condensate preheater heating surfaces is above an exhaust gas dew point in operation, wherein the condensate preheater has a condensate preheater inlet and a condensate preheater outlet and the heat transfer coefficient at the condensate preheater inlet is reduced relative to the heat transfer coefficient at the condensate preheater outlet, is provided. | 01-28-2016 |
20090133643 | METHOD AND APPARATUS FOR STEAM GENERATION - A method, apparatus, and system and operation of surface equipment to generate steam while reducing the quantity of boiler blowdown and thereby increasing the amount of feedwater that is re-used or re-cycled in generating said steam. The present invention teaches that, on a sustained basis, the blowdown stream at the outlet of a once-through steam generator can be routed to the inlet of a second once-through steam generator that is in series with the first, that blowdown stream can be used to generate additional steam in the second once-through steam generator and further reduce the amount of blowdown, and that this can be accomplished without need of any treatment that reduces hardness or silica levels of the blowdown stream prior to its entering or during its entry into the inlet of the second once-through steam generator. The output of this second steam generator is a substantially dry saturated steam vapor stream and, complementarily, a blowdown stream whose mass rate has been reduced substantially from that of the blowdown stream exiting the first steam generator. | 05-28-2009 |
20100012050 | Boiler Water Cycle of a Fluidized Bed Reactor and a Fluidized Bed Reactor - A boiler water cycle of a fluidized bed boiler, preferably, a supercritical once-through-unit (OTU) boiler, includes a drop leg, a number of horizontal inlet headers, substantially having a length of the length of a front wall of the furnace of the boiler, arranged below the furnace, and panels of water tubes of the front wall and a rear wall, extensions of the water tubes being directly connected to the inlet headers, wherein each inlet header is in flow communication with a drop leg by way of an inlet duct connected to the end of the inlet header. The inlet headers include a front wall chamber below the front wall of the furnace, a rear wall chamber arranged below the rear wall of the furnace, and at least one grid chamber below the center part of the furnace grid in a wind box of the fluidized bed boiler. | 01-21-2010 |
20130180471 | TUBE ARRANGEMENT IN A ONCE-THROUGH HORIZONTAL EVAPORATOR - Disclosed herein is a once-through evaporator comprising an inlet manifold; one or more inlet headers in fluid communication with the inlet manifold; one or more tube stacks, where each tube stack comprises one or more inclined evaporator tubes; the one or more tube stacks being in fluid communication with the one or more inlet headers; where the inclined tubes are inclined at an angle of less than 90 degrees or greater than 90 degrees to a vertical; one or more outlet headers in fluid communication with one or more tube stacks; and an outlet manifold in fluid communication with the one or more outlet headers. | 07-18-2013 |
20130233255 | Furnace Tube Arrangement for Steam Generator - A furnace tube arrangement for a steam generator is described. A plurality of furnace tubes disposed longitudinally form a generally planar wall structure into which burner throats are let at least two longitudinally spaced levels in familiar manner. Burner throats at the respective levels are so disposed that a vertical mid-line of each throat at a first level is laterally offset from a vertical mid line of a corresponding throat at a second level. | 09-12-2013 |
20140041601 | STEAM GENERATOR - A steam generator is provided. The steam generator has a combustion chamber having a peripheral wall formed at least partially from gas-proof, welded steam generator pipes, at least two additional inner walls formed at least partially from additional steam generator pipes which are arranged inside the combustion chamber. The inner walls are connected one behind the other on the flow medium side by an intermediate collector. The steam generator has a high service life and is reliable. The flow medium on the inlet of the inner wall upstream of the intermediate collector has a lower temperature than that of the flow medium on an inlet of the peripheral wall. | 02-13-2014 |
20140083374 | FORCED FLOW STEAM GENERATOR HAVING WALL HEATING SURFACE AND METHOD FOR ITS OPERATION - The invention refers to a forced flow steam generator ( | 03-27-2014 |
20140123914 | ONCE-THROUGH STEAM GENERATOR - A once-through steam generator comprises a duct having an inlet end in communication with a source of a hot gas; and a tube bundle installed in the duct and comprising multiple heat transfer tubes. The tube bundle has an economizer section, an evaporator section, and a superheater section. A steam separating device may be positioned between the evaporator section and the superheater section, wherein, as part of a wet start-up, hot water collected by the steam separating device is delivered from the steam separating device to mix with cold feedwater before it is introduced into the economizer section. A start-up module may be positioned in the duct near the inlet end, wherein, as part of a dry start-up, cold feedwater is delivered into the start-up module to generate hot water that is then mixed into the feedwater stream before it is introduced into the economizer section. | 05-08-2014 |
20150034024 | RADIANT TO CONVECTION TRANSITION FOR FIRED EQUIPMENT - Modern steam generators typically include a radiant section and a convection section. Due to differing performance requirements of the radiant and convection sections, the radiant section often has a round cross-section, while the convection section often has a rectangular cross-section. Previous designs utilized a target wall to effect the transition. An angled transition section is disclosed herein that substantially eliminates the target wall and/or the reverse target and provides a corresponding improvement in steam generator efficiency. | 02-05-2015 |
20150090201 | CONDENSING HEAT EXCHANGER AND BOILER/WATER HEARTER INCLUDING THE SAME - The present invention relates to a condensing heat exchanger and a boiler/water heater including the same and, more particularly, to a condensing heat exchanger, which can increase a contact area between water and a combustion gas having high temperature and improve efficiency by passing a combustion gas, generated from a combustion chamber, through a plurality of exhaust pipes and which can be fabricated in a small and compact size, and a boiler/water heater including the same. | 04-02-2015 |
20160178189 | STEAM GENERATION APPARATUS AND ASSOCIATED CONTROL SYSTEM AND METHODS FOR STARTUP | 06-23-2016 |
20160178190 | ONCE-THROUGH STEAM GENERATOR | 06-23-2016 |
20160195261 | ONCE-THROUGH STEAM GENERATOR | 07-07-2016 |
122002000 | Garbage | 3 |
20090050076 | BOILER PRODUCING STEAM FROM FLUE GASES WITH HIGH ELECTRICAL EFFICIENCY AND IMPROVED SLAG QUALITY - This invention relates to a boiler ( | 02-26-2009 |
20090084327 | MUNICIPAL SOLID WASTE FUEL STEAM GENERATOR WITH WATERWALL FURNACE PLATENS - A steam generator includes a furnace configured and adapted to generate a stream of furnace exit gases from the combustion of municipal solid waste fuel. At least one superheater is disposed within an upper portion of the furnace or backpass. The superheater is configured and adapted to superheat fluids within the superheater by facilitating heat transfer between fluids within the superheater and furnace exit gases outside the superheater. At least one waterwall furnace platen is disposed within the furnace upstream from the superheater, the waterwall furnace platen is configured and adapted to lower furnace exit gas temperature at the superheater by facilitating heat transfer between fluids within the waterwall furnace platen and furnace exit gases outside the waterwall furnace platen. | 04-02-2009 |
20120145094 | LIGNIN FIRED SUPERCRITICAL OR NEAR CRITICAL WATER GENERATOR, SYSTEM AND METHOD - Methods are disclosed for providing recovered lignin of suitable quantity and quality to provide sufficient heating value to power the generation of supercritical or near critical water without the need for outside sources of energy. Supercritical or near critical water generator devices and systems are also disclosed. | 06-14-2012 |
122003000 | Motor vehicle | 2 |
20090139465 | HIGH PRESSURE HOT GAS GENERATING DEVICE - A high pressure hot gas generating device comprises a combustion furnace; an interior of the combustion furnace having a combustion chamber; a lower side of the combustion furnace having an ash exhausting opening; an upper side of the combustion furnace having a high pressure hot gas output tube; a fuel transfer mechanism installed at one side of the combustion furnace and inserted into the combustion chamber for providing solid fuel to the combustion chamber of the combustion furnace; the fuel transfer mechanism can adjust the speed and amount of the solid fuel entering into the combustion chamber; and an air inlet unit installed at one side of the combustion furnace and inserted into the combustion chamber for supplying air to the combustion chamber to be used in the initial ignition; and an ignition unit. | 06-04-2009 |
20100313826 | HEATING DEVICE OF DRINKING FOUNTAIN IN CAR - The present invention provides a heating device of a drinking fountain in a car. It has a helical pipe, a wire net, an iron container, fireproof mud and a car exhaust pipe. The helical pipe is installed outside the car exhaust pipe and the wire net is used to cover the pipes. The iron container covers the wire net, the helical pipe and the car exhaust pipe. Fireproof mud is poured into the reserved space in the iron container and it is sealed completely. One end of the helical pipe is a water outlet, while the other end is a water intake. The car exhaust pipe generates high temperature and heats the helical pipe which is insulated by fireproof mud. When users push the drinking fountain switch, a motor will operate to pump out water from water storage. The water is heated when it goes by the helical pipe. | 12-16-2010 |
122001000 | Air heaters | 4 |
20080210178 | SELECTIVE CLEANING OF HEAT EXCHANGING DEVICES IN THE BOILER OF A COMBUSTION PLANT - A boiler of a combustion plant has at least one heat exchanging device which can be traversed by a medium from an inlet to an outlet and is held in the interior of the boiler by means of at least one suspension device, wherein means for determining the temperature of the medium are provided at least at the inlet or at the outlet, and the at least one suspension device has means for determining the weight of the at least one heat exchanging device. Also proposed are a cleaning control device, a cleaning method and a method for operating a combustion plant which permit a considerable reduction in the cleaning expenditure, so that maintenance costs can be kept low. | 09-04-2008 |
20080257282 | Fossil-Fuel Heated Continuous Steam Generator - The invention relates to a fossil-energy heated continuous steam generator, whereby the at least one combustion chamber, viewed in the flow direction of the hot gases, is divided into at least two throughflow segments, formed by evaporator heating surfaces, whereby the evaporator heating surfaces each comprise steam generation tubes welded to each other in a gastight manner and pressurized in parallel with a flow medium. According to the invention, said generator is suitable for operation with high fresh steam parameters, such as for example, steam temperatures of approximately 700° C., with a simple construction and particularly simple assembly, whereby a throughflow segment, arranged after the first through flow segment, viewed in the direction of flow of the hot gases, forms the first evaporator stage for the flow medium, such that the injection of particularly cold flow medium can occur in the region of maximum heating. | 10-23-2008 |
20080302314 | Solar concentration plant for the production of superheated steam - A solar concentration plant which uses water/steam as a heat-carrying fluid, in any thermodynamic cycle or system for the exploitation of process heat, which is comprised of an evaporation subsystem, where saturated steam is produced under the conditions of pressure of the system, and a superheater subsystem through which the steam reaches the required conditions of pressure and temperature at the turbine inlet, and in which an attemperation system ( | 12-11-2008 |
20090025658 | BLACK PLANT STEAM FURNACE INJECTION - A system and method for quickly cooling and de-pressurizing a boiler arrangement in the event of a plant power loss, a.k.a. a black plant condition. A steam discharge system injects steam from the steam/water circuit into the furnace, thereby both cooling components of the boiler arrangement and reducing pressure in the steam/water circuit. This reduces or eliminates the additional cost associated with providing extra capacity in a steam drum and/or an independently powered boiler water pump. The system and method is particularly useful for quickly cooling the U-beams of a circulating fluidized bed (CFB) boiler during a black plant condition. In application to boiler arrangements with a selective non-catalytic reduction (SNCR) system employing steam as a carrier for a NO | 01-29-2009 |
20090107422 | Direct fired heater utilizing particulates as a heat transfer medium - This invention relates to a means of heating a process fluid to elevated temperature thru use of heat resistant particulates as a heat transfer medium. Down-ward flowing particulates, enter the top of a refractory lined containment vessel, and are heated to elevated temperature by direct contact with an up-flowing stream of hot combustion products, generated by side wall burners located at the bottom of the containment vessel. The heated particulate stream is separated from the combustion gas stream at the bottom of the containment vessel and the spent combustion gas is directed to a downstream tubular convection section for heat recovery and for further processing to recover vaporized process fluid, as in the case of liquid feed preheating for delayed coking, or for feed preheating only, as in the case of gas cracking. The particulate stream is conveyed to the bottom of a second refractory lined containment vessel, by an incoming stream of the process fluid to be heated, and is raised to the desired outlet temperature by direct contact with the particulate stream. The particulates are separated from the process fluid in a low velocity region located in an expanded section at the top of the second vessel, and the process fluid is processed further in downstream equipment. Spent particulates are returned to the top of the first vessel, completing the continuity cycle. | 04-30-2009 |
20090188448 | Boiler Apparatus For Combusting Processed Agriculture Residues (PAR) And Method - An apparatus that extracts energy from processed agriculture residue (PAR) such as dried distiller grains or rapeseed as a biomass fuel having about 12% by weight or less moisture combusted in a vertically elongated combustion chamber having at least one suspension burner that projects a flame down a longitudinal axis of combustion chamber for transferring heat to heat collection surface located radially from the flame, an exhaust opening vertically spaced from a distal end of the flame containment portion and vertically spaced lower of a substantial majority of the heat collection surface, and a temperature modulator that supplies a cooling air. A method of extracting energy from PAR fuel is disclosed. | 07-30-2009 |
20090320771 | IONIC LIQUID MEDIUMS FOR HOLDING SOLID PHASE PROCESS GAS PRECURSORS - Ionic fluid mixtures are described that include an ionic liquid and a solid-phase material. The ionic liquid and the solid-phase material are selected to convert the solid-phase material into a gas phase material at a temperature that is lower than a conversion of the ionic liquid into a gas phase ionic material. In addition, methods of supplying a gaseous precursor to an application are described. These methods include providing a mixture of an ionic liquid and a solid-phase starting material, heating the mixture to a temperature that vaporizes at least a portion of the solid-phase starting material into the gaseous precursor, and transporting the gaseous precursor from the mixture to the application that utilizes the gaseous precursor. | 12-31-2009 |
20100236501 | REHEAT BOILER AND GAS TEMPERATURE CONTROLLING METHOD OF REHEAT BOILER - A reheat boiler according to the present invention includes a main boiler configured to make combustion gas originating from combustion in a burner flow from a furnace ( | 09-23-2010 |
20110197828 | Power Generation Using Water Pressure - Systems are disclosed that use water pressure to generate power. The systems can include a chamber having an inlet conduit and an outlet conduit that has a valve configured to regulate an outlet flow of water through the outlet conduit. A reciprocating element can be disposed within the chamber, such that the reciprocating element is moved as a function of a pressure of an inlet flow of water flowing through the inlet conduit. A generator can be coupled to the reciprocating element, such that power is generated as a function of the reciprocating element's movement. | 08-18-2011 |
20110315093 | FLUID HEATING SYSTEM, FLUID HEATING METHOD, FLUID HEATING CONTROL SYSTEM, CONTROL APPARATUS, AND CONTROL METHOD - When using a plurality of heaters such as heat pump units, capacity is properly distributed according to the required capacity, thereby enabling highly efficient operation of a hot water system. To achieve this, a control apparatus determines the heating capacity of each of the heat pump units in a way that the total heating capacity of the heat pump units reaches the heating capacity required in the hot water system as a whole, and further in a way that the total COP (coefficient of performance) of the heat pump units satisfies predetermined condition. The control apparatus controls each of regulating valves in a way that the heating capacity of each of the heat pump units reaches the above determined heating capacity. | 12-29-2011 |
20120017848 | METHOD AND APPARATUS FOR VAPORIZING LIQUID CHLORINE CONTAINING NITROGEN TRICHLORIDE - A method of safely vaporizing liquid chlorine containing high concentrations of nitrogen trichloride contaminant from a chloralkali plant. In a vertical plug-flow vaporizer having an upward flow direction, a stream of liquid chlorine containing nitrogen trichloride is received. A gas such as air, nitrogen or chlorine gas is introduced into the liquid stream upstream of the boiling zone of the vaporizer to induce a flow regime, for example annular flow or mist flow, that prevents a mass accumulation of nitrogen trichloride in the vaporizer. The liquid chlorine containing nitrogen trichloride is vaporized. The resulting gas stream may be processed to destroy the nitrogen trichloride and recycled to the chlorine production train. | 01-26-2012 |
20130042824 | HYDROMETHANATION OF A CARBONACEOUS FEEDSTOCK - The present invention relates to processes for hydromethanating a carbonaceous feedstock to a methane product stream and electrical power, in which heat energy from the hot methane-enriched synthesis gas is used to generate a dry saturated steam stream, the dry saturated steam stream is converted into a superheated steam stream via pressure drop for feeding into the hydromethanation reactor to satisfy the steam demand of the hydromethanation reaction, and heat generated from a downstream gas methanation processing is recovered to produce a superheated process steam stream which is used to generate the electric power. | 02-21-2013 |
20130247845 | HEAT RECOVERY AND UTILIZATION SYSTEM - This invention provides a heat recovery and utilization system for efficiently utilizing heat recovered from boiler exhaust gas with a heat recovery unit without any complicated equipment or high operation costs. The heat recovery and utilization system includes: a boiler for electricity generation; a heat recovery unit for recovering heat from exhaust gas of the boiler; a heat exchanger for using heat recovered with the heat recovery unit as heat source for equipment other than for electricity generation; a heat accumulator for accumulating heat source for the equipment other than for electricity generation; and a heat medium circulation line in which heat medium circulates between the heat recovery unit and the heat exchanger to exchange the heat recovered with the heat recovery unit with the heat exchanger. Upon startup of the system, the heat exchanger preheats the heat recovery unit with heat source accumulated in the heat accumulator. | 09-26-2013 |
20140060459 | HEAT RECOVERY SYSTEM AND HEAT RECOVERY METHOD - A heat recovery system includes a preheater ( | 03-06-2014 |
20090013941 | TRI-SECTOR REGENERATIVE OXIDANT PREHEATER FOR OXY-FIRED PULVERIZED COAL COMBUSTION - A tri-sector regenerative oxidant preheater apparatus, method and arrangement for utilization with oxy-fired pulverized coal combustion power plants. The preheater includes a stationary housing and a rotor rotatably mounted in the housing. Sector plates are located at the axial ends of the rotor and divide the preheater into a flue gas sector, two primary oxidant sectors, and a secondary oxidant sector interposed between the two primary oxidant sectors. A primary oxidant fan is located downstream of the preheater to create a negative environment in the primary oxidant sectors. During operation of the preheater, the environments of the two primary oxidant sectors and the flue gas sector are at about the same negative pressure, and thus there is very limited leakage between the oxidant side and the flue gas side of the preheater. The environment of the secondary oxidant sector is at a positive pressure and leakage to the negative environment of the primary oxidant sectors will be that of secondary oxidant to primary oxidant with no loss secondary oxidant to the gas side of the preheater. | 01-15-2009 |
20120060774 | PREHEATER FOR COMBUSTION AIR, AND A POWER PLANT - A preheating device for combustion air in a boiler. First heat exchanger structures fitted in a flue gas duct heat primary air. A first air supply area in the wall of the flue gas duct supplies air to be heated to the first heat exchanger structures. Second heat exchanger structures fitted in a flue gas duct heat secondary air. A second air supply area in the wall of the flue gas duct supplies air to be heated to the second heat exchanger structures. The first air supply area is opposite the second air supply area. Also a power plant. | 03-15-2012 |
20130192540 | SYSTEM FOR COMBINED FLUE GAS HEAT RECOVERY AND DUST PRECIPITATION IMPROVEMENT AS RETROFIT SOLUTION FOR EXISTING COAL-FIRED POWER STATIONS - A power plant is suggested with an additional heat transfer between the flue gas that flows through a flue gas line ( | 08-01-2013 |
20130239909 | ARRANGEMENT STRUCTURE SUITABLE FOR INVERTED PULVERIZED COAL BOILER WITH ULTRA-HIGH STEAM TEMPERATURE STEAM PARAMETERS - The disclosure provides an arrangement structure suitable for an inverted pulverized coal boiler with ultra-high steam temperature steam parameters, including a hearth, wherein the hearth is communicated with a middle uplink flue, and the top of the middle uplink flue is communicated with that of a tail downlink flue. In the arrangement structure suitable for an inverted pulverized coal boiler with ultra-high steam temperature steam parameters, the hearth is connected with the middle uplink flue by a hearth outlet horizontal flue at the bottom, so that the high-temperature gas at the hearth outlet is drained to a low elevation and then flows upwards through the middle uplink flue; a final heating surface may be arranged at the low position of the hearth outlet horizontal flue and the middle uplink flue so as to reduce the length of the high-temperature steam pipeline between the final heating surface and the steam turbine, lower the manufacturing cost of the boiler as well as the frication and radiation loss of the pipe, improve the efficiency of the power generating unit and make the power generating unit possible to adopt ultra-high steam temperature steam parameters and/or double reheat system. | 09-19-2013 |
20080223315 | System and Method for Zero Emissions, Hydrogen Fueled Steam Generator - As we move towards a hydrogen economy or use hydrogen as an energy carrier, the need to get heat energy and steam out of the hydrogen is arising more frequently. This invention addresses that need without the atmospheric pollutants which would result from burning carbon based fuels or hydrogen freely in the air. Presented is an invention which has very high overall efficiency and generates no oxides of carbon and nearly zero nitrogen oxide compounds. The generated steam can be used for comfort heating, process heating, electric generation and other common applications requiring steam. The invention can also be used for generation of hot water. The process of steam generation is accomplished by precisely metering the mixing and oxidation of hydrogen and oxygen under controlled conditions. The result of this oxidation reaction is simply only water and heat, which are used to generate steam. | 09-18-2008 |
20100251975 | ECONOMICAL USE OF AIR PREHEAT - An economical heat recovery system [ | 10-07-2010 |
20120037097 | HIGH EFFICIENCY FEEDWATER HEATER - A feedwater heater ( | 02-16-2012 |
20130312671 | APPARATUS AND CONTROL METHOD FOR A HYBRID TANKLESS WATER HEATER - An on demand tankless water heater system that is capable of quickly delivering water within a desired temperature range. The tankless water heater provides a hybrid heating method that contains a primary heating system and a secondary heating system disposed in a buffer tank that cooperate to facilitate control of output water temperature during water usage. A pressure differential switch detects low flow demand and allows the secondary heating system to provide immediate heating to the water. This secondary heating system provides a faster temperature response and fine tuning of output water temperature. | 11-28-2013 |
20150114318 | MINIMIZING FOULING IN STEAM ASSISTED OIL PRODUCTION - Methods and systems generate steam for heavy oil recovery operations, wherein fouling is limited with the use of wire matrix turbulators in tubes with tendencies to foul. | 04-30-2015 |
20160025331 | CONDENSATE PREHEATER FOR WASTE HEAT STEAM GENERATOR - A condensate preheater for a waste-heat steam generator, including condensate preheater heating surfaces, around which exhaust gas of a gas turbine flows in operation in order to heat up water flowing in the condensate preheater heating surfaces, wherein a respective heat transfer coefficient of the condensate preheater heating surfaces is selected such that a surface temperature of the condensate preheater heating surfaces is above an exhaust gas dew point in operation, wherein the condensate preheater has a condensate preheater inlet and a condensate preheater outlet and the heat transfer coefficient at the condensate preheater inlet is reduced relative to the heat transfer coefficient at the condensate preheater outlet, is provided. | 01-28-2016 |
20090133643 | METHOD AND APPARATUS FOR STEAM GENERATION - A method, apparatus, and system and operation of surface equipment to generate steam while reducing the quantity of boiler blowdown and thereby increasing the amount of feedwater that is re-used or re-cycled in generating said steam. The present invention teaches that, on a sustained basis, the blowdown stream at the outlet of a once-through steam generator can be routed to the inlet of a second once-through steam generator that is in series with the first, that blowdown stream can be used to generate additional steam in the second once-through steam generator and further reduce the amount of blowdown, and that this can be accomplished without need of any treatment that reduces hardness or silica levels of the blowdown stream prior to its entering or during its entry into the inlet of the second once-through steam generator. The output of this second steam generator is a substantially dry saturated steam vapor stream and, complementarily, a blowdown stream whose mass rate has been reduced substantially from that of the blowdown stream exiting the first steam generator. | 05-28-2009 |
20100012050 | Boiler Water Cycle of a Fluidized Bed Reactor and a Fluidized Bed Reactor - A boiler water cycle of a fluidized bed boiler, preferably, a supercritical once-through-unit (OTU) boiler, includes a drop leg, a number of horizontal inlet headers, substantially having a length of the length of a front wall of the furnace of the boiler, arranged below the furnace, and panels of water tubes of the front wall and a rear wall, extensions of the water tubes being directly connected to the inlet headers, wherein each inlet header is in flow communication with a drop leg by way of an inlet duct connected to the end of the inlet header. The inlet headers include a front wall chamber below the front wall of the furnace, a rear wall chamber arranged below the rear wall of the furnace, and at least one grid chamber below the center part of the furnace grid in a wind box of the fluidized bed boiler. | 01-21-2010 |
20130180471 | TUBE ARRANGEMENT IN A ONCE-THROUGH HORIZONTAL EVAPORATOR - Disclosed herein is a once-through evaporator comprising an inlet manifold; one or more inlet headers in fluid communication with the inlet manifold; one or more tube stacks, where each tube stack comprises one or more inclined evaporator tubes; the one or more tube stacks being in fluid communication with the one or more inlet headers; where the inclined tubes are inclined at an angle of less than 90 degrees or greater than 90 degrees to a vertical; one or more outlet headers in fluid communication with one or more tube stacks; and an outlet manifold in fluid communication with the one or more outlet headers. | 07-18-2013 |
20130233255 | Furnace Tube Arrangement for Steam Generator - A furnace tube arrangement for a steam generator is described. A plurality of furnace tubes disposed longitudinally form a generally planar wall structure into which burner throats are let at least two longitudinally spaced levels in familiar manner. Burner throats at the respective levels are so disposed that a vertical mid-line of each throat at a first level is laterally offset from a vertical mid line of a corresponding throat at a second level. | 09-12-2013 |
20140041601 | STEAM GENERATOR - A steam generator is provided. The steam generator has a combustion chamber having a peripheral wall formed at least partially from gas-proof, welded steam generator pipes, at least two additional inner walls formed at least partially from additional steam generator pipes which are arranged inside the combustion chamber. The inner walls are connected one behind the other on the flow medium side by an intermediate collector. The steam generator has a high service life and is reliable. The flow medium on the inlet of the inner wall upstream of the intermediate collector has a lower temperature than that of the flow medium on an inlet of the peripheral wall. | 02-13-2014 |
20140083374 | FORCED FLOW STEAM GENERATOR HAVING WALL HEATING SURFACE AND METHOD FOR ITS OPERATION - The invention refers to a forced flow steam generator ( | 03-27-2014 |
20140123914 | ONCE-THROUGH STEAM GENERATOR - A once-through steam generator comprises a duct having an inlet end in communication with a source of a hot gas; and a tube bundle installed in the duct and comprising multiple heat transfer tubes. The tube bundle has an economizer section, an evaporator section, and a superheater section. A steam separating device may be positioned between the evaporator section and the superheater section, wherein, as part of a wet start-up, hot water collected by the steam separating device is delivered from the steam separating device to mix with cold feedwater before it is introduced into the economizer section. A start-up module may be positioned in the duct near the inlet end, wherein, as part of a dry start-up, cold feedwater is delivered into the start-up module to generate hot water that is then mixed into the feedwater stream before it is introduced into the economizer section. | 05-08-2014 |
20150034024 | RADIANT TO CONVECTION TRANSITION FOR FIRED EQUIPMENT - Modern steam generators typically include a radiant section and a convection section. Due to differing performance requirements of the radiant and convection sections, the radiant section often has a round cross-section, while the convection section often has a rectangular cross-section. Previous designs utilized a target wall to effect the transition. An angled transition section is disclosed herein that substantially eliminates the target wall and/or the reverse target and provides a corresponding improvement in steam generator efficiency. | 02-05-2015 |
20150090201 | CONDENSING HEAT EXCHANGER AND BOILER/WATER HEARTER INCLUDING THE SAME - The present invention relates to a condensing heat exchanger and a boiler/water heater including the same and, more particularly, to a condensing heat exchanger, which can increase a contact area between water and a combustion gas having high temperature and improve efficiency by passing a combustion gas, generated from a combustion chamber, through a plurality of exhaust pipes and which can be fabricated in a small and compact size, and a boiler/water heater including the same. | 04-02-2015 |
20160178189 | STEAM GENERATION APPARATUS AND ASSOCIATED CONTROL SYSTEM AND METHODS FOR STARTUP | 06-23-2016 |
20160178190 | ONCE-THROUGH STEAM GENERATOR | 06-23-2016 |
20160195261 | ONCE-THROUGH STEAM GENERATOR | 07-07-2016 |
122001000 | Once through | 12 |
20080210178 | SELECTIVE CLEANING OF HEAT EXCHANGING DEVICES IN THE BOILER OF A COMBUSTION PLANT - A boiler of a combustion plant has at least one heat exchanging device which can be traversed by a medium from an inlet to an outlet and is held in the interior of the boiler by means of at least one suspension device, wherein means for determining the temperature of the medium are provided at least at the inlet or at the outlet, and the at least one suspension device has means for determining the weight of the at least one heat exchanging device. Also proposed are a cleaning control device, a cleaning method and a method for operating a combustion plant which permit a considerable reduction in the cleaning expenditure, so that maintenance costs can be kept low. | 09-04-2008 |
20080257282 | Fossil-Fuel Heated Continuous Steam Generator - The invention relates to a fossil-energy heated continuous steam generator, whereby the at least one combustion chamber, viewed in the flow direction of the hot gases, is divided into at least two throughflow segments, formed by evaporator heating surfaces, whereby the evaporator heating surfaces each comprise steam generation tubes welded to each other in a gastight manner and pressurized in parallel with a flow medium. According to the invention, said generator is suitable for operation with high fresh steam parameters, such as for example, steam temperatures of approximately 700° C., with a simple construction and particularly simple assembly, whereby a throughflow segment, arranged after the first through flow segment, viewed in the direction of flow of the hot gases, forms the first evaporator stage for the flow medium, such that the injection of particularly cold flow medium can occur in the region of maximum heating. | 10-23-2008 |
20080302314 | Solar concentration plant for the production of superheated steam - A solar concentration plant which uses water/steam as a heat-carrying fluid, in any thermodynamic cycle or system for the exploitation of process heat, which is comprised of an evaporation subsystem, where saturated steam is produced under the conditions of pressure of the system, and a superheater subsystem through which the steam reaches the required conditions of pressure and temperature at the turbine inlet, and in which an attemperation system ( | 12-11-2008 |
20090025658 | BLACK PLANT STEAM FURNACE INJECTION - A system and method for quickly cooling and de-pressurizing a boiler arrangement in the event of a plant power loss, a.k.a. a black plant condition. A steam discharge system injects steam from the steam/water circuit into the furnace, thereby both cooling components of the boiler arrangement and reducing pressure in the steam/water circuit. This reduces or eliminates the additional cost associated with providing extra capacity in a steam drum and/or an independently powered boiler water pump. The system and method is particularly useful for quickly cooling the U-beams of a circulating fluidized bed (CFB) boiler during a black plant condition. In application to boiler arrangements with a selective non-catalytic reduction (SNCR) system employing steam as a carrier for a NO | 01-29-2009 |
20090107422 | Direct fired heater utilizing particulates as a heat transfer medium - This invention relates to a means of heating a process fluid to elevated temperature thru use of heat resistant particulates as a heat transfer medium. Down-ward flowing particulates, enter the top of a refractory lined containment vessel, and are heated to elevated temperature by direct contact with an up-flowing stream of hot combustion products, generated by side wall burners located at the bottom of the containment vessel. The heated particulate stream is separated from the combustion gas stream at the bottom of the containment vessel and the spent combustion gas is directed to a downstream tubular convection section for heat recovery and for further processing to recover vaporized process fluid, as in the case of liquid feed preheating for delayed coking, or for feed preheating only, as in the case of gas cracking. The particulate stream is conveyed to the bottom of a second refractory lined containment vessel, by an incoming stream of the process fluid to be heated, and is raised to the desired outlet temperature by direct contact with the particulate stream. The particulates are separated from the process fluid in a low velocity region located in an expanded section at the top of the second vessel, and the process fluid is processed further in downstream equipment. Spent particulates are returned to the top of the first vessel, completing the continuity cycle. | 04-30-2009 |
20090188448 | Boiler Apparatus For Combusting Processed Agriculture Residues (PAR) And Method - An apparatus that extracts energy from processed agriculture residue (PAR) such as dried distiller grains or rapeseed as a biomass fuel having about 12% by weight or less moisture combusted in a vertically elongated combustion chamber having at least one suspension burner that projects a flame down a longitudinal axis of combustion chamber for transferring heat to heat collection surface located radially from the flame, an exhaust opening vertically spaced from a distal end of the flame containment portion and vertically spaced lower of a substantial majority of the heat collection surface, and a temperature modulator that supplies a cooling air. A method of extracting energy from PAR fuel is disclosed. | 07-30-2009 |
20090320771 | IONIC LIQUID MEDIUMS FOR HOLDING SOLID PHASE PROCESS GAS PRECURSORS - Ionic fluid mixtures are described that include an ionic liquid and a solid-phase material. The ionic liquid and the solid-phase material are selected to convert the solid-phase material into a gas phase material at a temperature that is lower than a conversion of the ionic liquid into a gas phase ionic material. In addition, methods of supplying a gaseous precursor to an application are described. These methods include providing a mixture of an ionic liquid and a solid-phase starting material, heating the mixture to a temperature that vaporizes at least a portion of the solid-phase starting material into the gaseous precursor, and transporting the gaseous precursor from the mixture to the application that utilizes the gaseous precursor. | 12-31-2009 |
20100236501 | REHEAT BOILER AND GAS TEMPERATURE CONTROLLING METHOD OF REHEAT BOILER - A reheat boiler according to the present invention includes a main boiler configured to make combustion gas originating from combustion in a burner flow from a furnace ( | 09-23-2010 |
20110197828 | Power Generation Using Water Pressure - Systems are disclosed that use water pressure to generate power. The systems can include a chamber having an inlet conduit and an outlet conduit that has a valve configured to regulate an outlet flow of water through the outlet conduit. A reciprocating element can be disposed within the chamber, such that the reciprocating element is moved as a function of a pressure of an inlet flow of water flowing through the inlet conduit. A generator can be coupled to the reciprocating element, such that power is generated as a function of the reciprocating element's movement. | 08-18-2011 |
20110315093 | FLUID HEATING SYSTEM, FLUID HEATING METHOD, FLUID HEATING CONTROL SYSTEM, CONTROL APPARATUS, AND CONTROL METHOD - When using a plurality of heaters such as heat pump units, capacity is properly distributed according to the required capacity, thereby enabling highly efficient operation of a hot water system. To achieve this, a control apparatus determines the heating capacity of each of the heat pump units in a way that the total heating capacity of the heat pump units reaches the heating capacity required in the hot water system as a whole, and further in a way that the total COP (coefficient of performance) of the heat pump units satisfies predetermined condition. The control apparatus controls each of regulating valves in a way that the heating capacity of each of the heat pump units reaches the above determined heating capacity. | 12-29-2011 |
20120017848 | METHOD AND APPARATUS FOR VAPORIZING LIQUID CHLORINE CONTAINING NITROGEN TRICHLORIDE - A method of safely vaporizing liquid chlorine containing high concentrations of nitrogen trichloride contaminant from a chloralkali plant. In a vertical plug-flow vaporizer having an upward flow direction, a stream of liquid chlorine containing nitrogen trichloride is received. A gas such as air, nitrogen or chlorine gas is introduced into the liquid stream upstream of the boiling zone of the vaporizer to induce a flow regime, for example annular flow or mist flow, that prevents a mass accumulation of nitrogen trichloride in the vaporizer. The liquid chlorine containing nitrogen trichloride is vaporized. The resulting gas stream may be processed to destroy the nitrogen trichloride and recycled to the chlorine production train. | 01-26-2012 |
20130042824 | HYDROMETHANATION OF A CARBONACEOUS FEEDSTOCK - The present invention relates to processes for hydromethanating a carbonaceous feedstock to a methane product stream and electrical power, in which heat energy from the hot methane-enriched synthesis gas is used to generate a dry saturated steam stream, the dry saturated steam stream is converted into a superheated steam stream via pressure drop for feeding into the hydromethanation reactor to satisfy the steam demand of the hydromethanation reaction, and heat generated from a downstream gas methanation processing is recovered to produce a superheated process steam stream which is used to generate the electric power. | 02-21-2013 |
20130247845 | HEAT RECOVERY AND UTILIZATION SYSTEM - This invention provides a heat recovery and utilization system for efficiently utilizing heat recovered from boiler exhaust gas with a heat recovery unit without any complicated equipment or high operation costs. The heat recovery and utilization system includes: a boiler for electricity generation; a heat recovery unit for recovering heat from exhaust gas of the boiler; a heat exchanger for using heat recovered with the heat recovery unit as heat source for equipment other than for electricity generation; a heat accumulator for accumulating heat source for the equipment other than for electricity generation; and a heat medium circulation line in which heat medium circulates between the heat recovery unit and the heat exchanger to exchange the heat recovered with the heat recovery unit with the heat exchanger. Upon startup of the system, the heat exchanger preheats the heat recovery unit with heat source accumulated in the heat accumulator. | 09-26-2013 |
20140060459 | HEAT RECOVERY SYSTEM AND HEAT RECOVERY METHOD - A heat recovery system includes a preheater ( | 03-06-2014 |
20090013941 | TRI-SECTOR REGENERATIVE OXIDANT PREHEATER FOR OXY-FIRED PULVERIZED COAL COMBUSTION - A tri-sector regenerative oxidant preheater apparatus, method and arrangement for utilization with oxy-fired pulverized coal combustion power plants. The preheater includes a stationary housing and a rotor rotatably mounted in the housing. Sector plates are located at the axial ends of the rotor and divide the preheater into a flue gas sector, two primary oxidant sectors, and a secondary oxidant sector interposed between the two primary oxidant sectors. A primary oxidant fan is located downstream of the preheater to create a negative environment in the primary oxidant sectors. During operation of the preheater, the environments of the two primary oxidant sectors and the flue gas sector are at about the same negative pressure, and thus there is very limited leakage between the oxidant side and the flue gas side of the preheater. The environment of the secondary oxidant sector is at a positive pressure and leakage to the negative environment of the primary oxidant sectors will be that of secondary oxidant to primary oxidant with no loss secondary oxidant to the gas side of the preheater. | 01-15-2009 |
20120060774 | PREHEATER FOR COMBUSTION AIR, AND A POWER PLANT - A preheating device for combustion air in a boiler. First heat exchanger structures fitted in a flue gas duct heat primary air. A first air supply area in the wall of the flue gas duct supplies air to be heated to the first heat exchanger structures. Second heat exchanger structures fitted in a flue gas duct heat secondary air. A second air supply area in the wall of the flue gas duct supplies air to be heated to the second heat exchanger structures. The first air supply area is opposite the second air supply area. Also a power plant. | 03-15-2012 |
20130192540 | SYSTEM FOR COMBINED FLUE GAS HEAT RECOVERY AND DUST PRECIPITATION IMPROVEMENT AS RETROFIT SOLUTION FOR EXISTING COAL-FIRED POWER STATIONS - A power plant is suggested with an additional heat transfer between the flue gas that flows through a flue gas line ( | 08-01-2013 |
20130239909 | ARRANGEMENT STRUCTURE SUITABLE FOR INVERTED PULVERIZED COAL BOILER WITH ULTRA-HIGH STEAM TEMPERATURE STEAM PARAMETERS - The disclosure provides an arrangement structure suitable for an inverted pulverized coal boiler with ultra-high steam temperature steam parameters, including a hearth, wherein the hearth is communicated with a middle uplink flue, and the top of the middle uplink flue is communicated with that of a tail downlink flue. In the arrangement structure suitable for an inverted pulverized coal boiler with ultra-high steam temperature steam parameters, the hearth is connected with the middle uplink flue by a hearth outlet horizontal flue at the bottom, so that the high-temperature gas at the hearth outlet is drained to a low elevation and then flows upwards through the middle uplink flue; a final heating surface may be arranged at the low position of the hearth outlet horizontal flue and the middle uplink flue so as to reduce the length of the high-temperature steam pipeline between the final heating surface and the steam turbine, lower the manufacturing cost of the boiler as well as the frication and radiation loss of the pipe, improve the efficiency of the power generating unit and make the power generating unit possible to adopt ultra-high steam temperature steam parameters and/or double reheat system. | 09-19-2013 |
20080223315 | System and Method for Zero Emissions, Hydrogen Fueled Steam Generator - As we move towards a hydrogen economy or use hydrogen as an energy carrier, the need to get heat energy and steam out of the hydrogen is arising more frequently. This invention addresses that need without the atmospheric pollutants which would result from burning carbon based fuels or hydrogen freely in the air. Presented is an invention which has very high overall efficiency and generates no oxides of carbon and nearly zero nitrogen oxide compounds. The generated steam can be used for comfort heating, process heating, electric generation and other common applications requiring steam. The invention can also be used for generation of hot water. The process of steam generation is accomplished by precisely metering the mixing and oxidation of hydrogen and oxygen under controlled conditions. The result of this oxidation reaction is simply only water and heat, which are used to generate steam. | 09-18-2008 |
20100251975 | ECONOMICAL USE OF AIR PREHEAT - An economical heat recovery system [ | 10-07-2010 |
20120037097 | HIGH EFFICIENCY FEEDWATER HEATER - A feedwater heater ( | 02-16-2012 |
20130312671 | APPARATUS AND CONTROL METHOD FOR A HYBRID TANKLESS WATER HEATER - An on demand tankless water heater system that is capable of quickly delivering water within a desired temperature range. The tankless water heater provides a hybrid heating method that contains a primary heating system and a secondary heating system disposed in a buffer tank that cooperate to facilitate control of output water temperature during water usage. A pressure differential switch detects low flow demand and allows the secondary heating system to provide immediate heating to the water. This secondary heating system provides a faster temperature response and fine tuning of output water temperature. | 11-28-2013 |
20150114318 | MINIMIZING FOULING IN STEAM ASSISTED OIL PRODUCTION - Methods and systems generate steam for heavy oil recovery operations, wherein fouling is limited with the use of wire matrix turbulators in tubes with tendencies to foul. | 04-30-2015 |
20160025331 | CONDENSATE PREHEATER FOR WASTE HEAT STEAM GENERATOR - A condensate preheater for a waste-heat steam generator, including condensate preheater heating surfaces, around which exhaust gas of a gas turbine flows in operation in order to heat up water flowing in the condensate preheater heating surfaces, wherein a respective heat transfer coefficient of the condensate preheater heating surfaces is selected such that a surface temperature of the condensate preheater heating surfaces is above an exhaust gas dew point in operation, wherein the condensate preheater has a condensate preheater inlet and a condensate preheater outlet and the heat transfer coefficient at the condensate preheater inlet is reduced relative to the heat transfer coefficient at the condensate preheater outlet, is provided. | 01-28-2016 |
20090133643 | METHOD AND APPARATUS FOR STEAM GENERATION - A method, apparatus, and system and operation of surface equipment to generate steam while reducing the quantity of boiler blowdown and thereby increasing the amount of feedwater that is re-used or re-cycled in generating said steam. The present invention teaches that, on a sustained basis, the blowdown stream at the outlet of a once-through steam generator can be routed to the inlet of a second once-through steam generator that is in series with the first, that blowdown stream can be used to generate additional steam in the second once-through steam generator and further reduce the amount of blowdown, and that this can be accomplished without need of any treatment that reduces hardness or silica levels of the blowdown stream prior to its entering or during its entry into the inlet of the second once-through steam generator. The output of this second steam generator is a substantially dry saturated steam vapor stream and, complementarily, a blowdown stream whose mass rate has been reduced substantially from that of the blowdown stream exiting the first steam generator. | 05-28-2009 |
20100012050 | Boiler Water Cycle of a Fluidized Bed Reactor and a Fluidized Bed Reactor - A boiler water cycle of a fluidized bed boiler, preferably, a supercritical once-through-unit (OTU) boiler, includes a drop leg, a number of horizontal inlet headers, substantially having a length of the length of a front wall of the furnace of the boiler, arranged below the furnace, and panels of water tubes of the front wall and a rear wall, extensions of the water tubes being directly connected to the inlet headers, wherein each inlet header is in flow communication with a drop leg by way of an inlet duct connected to the end of the inlet header. The inlet headers include a front wall chamber below the front wall of the furnace, a rear wall chamber arranged below the rear wall of the furnace, and at least one grid chamber below the center part of the furnace grid in a wind box of the fluidized bed boiler. | 01-21-2010 |
20130180471 | TUBE ARRANGEMENT IN A ONCE-THROUGH HORIZONTAL EVAPORATOR - Disclosed herein is a once-through evaporator comprising an inlet manifold; one or more inlet headers in fluid communication with the inlet manifold; one or more tube stacks, where each tube stack comprises one or more inclined evaporator tubes; the one or more tube stacks being in fluid communication with the one or more inlet headers; where the inclined tubes are inclined at an angle of less than 90 degrees or greater than 90 degrees to a vertical; one or more outlet headers in fluid communication with one or more tube stacks; and an outlet manifold in fluid communication with the one or more outlet headers. | 07-18-2013 |
20130233255 | Furnace Tube Arrangement for Steam Generator - A furnace tube arrangement for a steam generator is described. A plurality of furnace tubes disposed longitudinally form a generally planar wall structure into which burner throats are let at least two longitudinally spaced levels in familiar manner. Burner throats at the respective levels are so disposed that a vertical mid-line of each throat at a first level is laterally offset from a vertical mid line of a corresponding throat at a second level. | 09-12-2013 |
20140041601 | STEAM GENERATOR - A steam generator is provided. The steam generator has a combustion chamber having a peripheral wall formed at least partially from gas-proof, welded steam generator pipes, at least two additional inner walls formed at least partially from additional steam generator pipes which are arranged inside the combustion chamber. The inner walls are connected one behind the other on the flow medium side by an intermediate collector. The steam generator has a high service life and is reliable. The flow medium on the inlet of the inner wall upstream of the intermediate collector has a lower temperature than that of the flow medium on an inlet of the peripheral wall. | 02-13-2014 |
20140083374 | FORCED FLOW STEAM GENERATOR HAVING WALL HEATING SURFACE AND METHOD FOR ITS OPERATION - The invention refers to a forced flow steam generator ( | 03-27-2014 |
20140123914 | ONCE-THROUGH STEAM GENERATOR - A once-through steam generator comprises a duct having an inlet end in communication with a source of a hot gas; and a tube bundle installed in the duct and comprising multiple heat transfer tubes. The tube bundle has an economizer section, an evaporator section, and a superheater section. A steam separating device may be positioned between the evaporator section and the superheater section, wherein, as part of a wet start-up, hot water collected by the steam separating device is delivered from the steam separating device to mix with cold feedwater before it is introduced into the economizer section. A start-up module may be positioned in the duct near the inlet end, wherein, as part of a dry start-up, cold feedwater is delivered into the start-up module to generate hot water that is then mixed into the feedwater stream before it is introduced into the economizer section. | 05-08-2014 |
20150034024 | RADIANT TO CONVECTION TRANSITION FOR FIRED EQUIPMENT - Modern steam generators typically include a radiant section and a convection section. Due to differing performance requirements of the radiant and convection sections, the radiant section often has a round cross-section, while the convection section often has a rectangular cross-section. Previous designs utilized a target wall to effect the transition. An angled transition section is disclosed herein that substantially eliminates the target wall and/or the reverse target and provides a corresponding improvement in steam generator efficiency. | 02-05-2015 |
20150090201 | CONDENSING HEAT EXCHANGER AND BOILER/WATER HEARTER INCLUDING THE SAME - The present invention relates to a condensing heat exchanger and a boiler/water heater including the same and, more particularly, to a condensing heat exchanger, which can increase a contact area between water and a combustion gas having high temperature and improve efficiency by passing a combustion gas, generated from a combustion chamber, through a plurality of exhaust pipes and which can be fabricated in a small and compact size, and a boiler/water heater including the same. | 04-02-2015 |
20160178189 | STEAM GENERATION APPARATUS AND ASSOCIATED CONTROL SYSTEM AND METHODS FOR STARTUP | 06-23-2016 |
20160178190 | ONCE-THROUGH STEAM GENERATOR | 06-23-2016 |
20160195261 | ONCE-THROUGH STEAM GENERATOR | 07-07-2016 |
122001000 | Feed water heaters | 6 |
20080210178 | SELECTIVE CLEANING OF HEAT EXCHANGING DEVICES IN THE BOILER OF A COMBUSTION PLANT - A boiler of a combustion plant has at least one heat exchanging device which can be traversed by a medium from an inlet to an outlet and is held in the interior of the boiler by means of at least one suspension device, wherein means for determining the temperature of the medium are provided at least at the inlet or at the outlet, and the at least one suspension device has means for determining the weight of the at least one heat exchanging device. Also proposed are a cleaning control device, a cleaning method and a method for operating a combustion plant which permit a considerable reduction in the cleaning expenditure, so that maintenance costs can be kept low. | 09-04-2008 |
20080257282 | Fossil-Fuel Heated Continuous Steam Generator - The invention relates to a fossil-energy heated continuous steam generator, whereby the at least one combustion chamber, viewed in the flow direction of the hot gases, is divided into at least two throughflow segments, formed by evaporator heating surfaces, whereby the evaporator heating surfaces each comprise steam generation tubes welded to each other in a gastight manner and pressurized in parallel with a flow medium. According to the invention, said generator is suitable for operation with high fresh steam parameters, such as for example, steam temperatures of approximately 700° C., with a simple construction and particularly simple assembly, whereby a throughflow segment, arranged after the first through flow segment, viewed in the direction of flow of the hot gases, forms the first evaporator stage for the flow medium, such that the injection of particularly cold flow medium can occur in the region of maximum heating. | 10-23-2008 |
20080302314 | Solar concentration plant for the production of superheated steam - A solar concentration plant which uses water/steam as a heat-carrying fluid, in any thermodynamic cycle or system for the exploitation of process heat, which is comprised of an evaporation subsystem, where saturated steam is produced under the conditions of pressure of the system, and a superheater subsystem through which the steam reaches the required conditions of pressure and temperature at the turbine inlet, and in which an attemperation system ( | 12-11-2008 |
20090025658 | BLACK PLANT STEAM FURNACE INJECTION - A system and method for quickly cooling and de-pressurizing a boiler arrangement in the event of a plant power loss, a.k.a. a black plant condition. A steam discharge system injects steam from the steam/water circuit into the furnace, thereby both cooling components of the boiler arrangement and reducing pressure in the steam/water circuit. This reduces or eliminates the additional cost associated with providing extra capacity in a steam drum and/or an independently powered boiler water pump. The system and method is particularly useful for quickly cooling the U-beams of a circulating fluidized bed (CFB) boiler during a black plant condition. In application to boiler arrangements with a selective non-catalytic reduction (SNCR) system employing steam as a carrier for a NO | 01-29-2009 |
20090107422 | Direct fired heater utilizing particulates as a heat transfer medium - This invention relates to a means of heating a process fluid to elevated temperature thru use of heat resistant particulates as a heat transfer medium. Down-ward flowing particulates, enter the top of a refractory lined containment vessel, and are heated to elevated temperature by direct contact with an up-flowing stream of hot combustion products, generated by side wall burners located at the bottom of the containment vessel. The heated particulate stream is separated from the combustion gas stream at the bottom of the containment vessel and the spent combustion gas is directed to a downstream tubular convection section for heat recovery and for further processing to recover vaporized process fluid, as in the case of liquid feed preheating for delayed coking, or for feed preheating only, as in the case of gas cracking. The particulate stream is conveyed to the bottom of a second refractory lined containment vessel, by an incoming stream of the process fluid to be heated, and is raised to the desired outlet temperature by direct contact with the particulate stream. The particulates are separated from the process fluid in a low velocity region located in an expanded section at the top of the second vessel, and the process fluid is processed further in downstream equipment. Spent particulates are returned to the top of the first vessel, completing the continuity cycle. | 04-30-2009 |
20090188448 | Boiler Apparatus For Combusting Processed Agriculture Residues (PAR) And Method - An apparatus that extracts energy from processed agriculture residue (PAR) such as dried distiller grains or rapeseed as a biomass fuel having about 12% by weight or less moisture combusted in a vertically elongated combustion chamber having at least one suspension burner that projects a flame down a longitudinal axis of combustion chamber for transferring heat to heat collection surface located radially from the flame, an exhaust opening vertically spaced from a distal end of the flame containment portion and vertically spaced lower of a substantial majority of the heat collection surface, and a temperature modulator that supplies a cooling air. A method of extracting energy from PAR fuel is disclosed. | 07-30-2009 |
20090320771 | IONIC LIQUID MEDIUMS FOR HOLDING SOLID PHASE PROCESS GAS PRECURSORS - Ionic fluid mixtures are described that include an ionic liquid and a solid-phase material. The ionic liquid and the solid-phase material are selected to convert the solid-phase material into a gas phase material at a temperature that is lower than a conversion of the ionic liquid into a gas phase ionic material. In addition, methods of supplying a gaseous precursor to an application are described. These methods include providing a mixture of an ionic liquid and a solid-phase starting material, heating the mixture to a temperature that vaporizes at least a portion of the solid-phase starting material into the gaseous precursor, and transporting the gaseous precursor from the mixture to the application that utilizes the gaseous precursor. | 12-31-2009 |
20100236501 | REHEAT BOILER AND GAS TEMPERATURE CONTROLLING METHOD OF REHEAT BOILER - A reheat boiler according to the present invention includes a main boiler configured to make combustion gas originating from combustion in a burner flow from a furnace ( | 09-23-2010 |
20110197828 | Power Generation Using Water Pressure - Systems are disclosed that use water pressure to generate power. The systems can include a chamber having an inlet conduit and an outlet conduit that has a valve configured to regulate an outlet flow of water through the outlet conduit. A reciprocating element can be disposed within the chamber, such that the reciprocating element is moved as a function of a pressure of an inlet flow of water flowing through the inlet conduit. A generator can be coupled to the reciprocating element, such that power is generated as a function of the reciprocating element's movement. | 08-18-2011 |
20110315093 | FLUID HEATING SYSTEM, FLUID HEATING METHOD, FLUID HEATING CONTROL SYSTEM, CONTROL APPARATUS, AND CONTROL METHOD - When using a plurality of heaters such as heat pump units, capacity is properly distributed according to the required capacity, thereby enabling highly efficient operation of a hot water system. To achieve this, a control apparatus determines the heating capacity of each of the heat pump units in a way that the total heating capacity of the heat pump units reaches the heating capacity required in the hot water system as a whole, and further in a way that the total COP (coefficient of performance) of the heat pump units satisfies predetermined condition. The control apparatus controls each of regulating valves in a way that the heating capacity of each of the heat pump units reaches the above determined heating capacity. | 12-29-2011 |
20120017848 | METHOD AND APPARATUS FOR VAPORIZING LIQUID CHLORINE CONTAINING NITROGEN TRICHLORIDE - A method of safely vaporizing liquid chlorine containing high concentrations of nitrogen trichloride contaminant from a chloralkali plant. In a vertical plug-flow vaporizer having an upward flow direction, a stream of liquid chlorine containing nitrogen trichloride is received. A gas such as air, nitrogen or chlorine gas is introduced into the liquid stream upstream of the boiling zone of the vaporizer to induce a flow regime, for example annular flow or mist flow, that prevents a mass accumulation of nitrogen trichloride in the vaporizer. The liquid chlorine containing nitrogen trichloride is vaporized. The resulting gas stream may be processed to destroy the nitrogen trichloride and recycled to the chlorine production train. | 01-26-2012 |
20130042824 | HYDROMETHANATION OF A CARBONACEOUS FEEDSTOCK - The present invention relates to processes for hydromethanating a carbonaceous feedstock to a methane product stream and electrical power, in which heat energy from the hot methane-enriched synthesis gas is used to generate a dry saturated steam stream, the dry saturated steam stream is converted into a superheated steam stream via pressure drop for feeding into the hydromethanation reactor to satisfy the steam demand of the hydromethanation reaction, and heat generated from a downstream gas methanation processing is recovered to produce a superheated process steam stream which is used to generate the electric power. | 02-21-2013 |
20130247845 | HEAT RECOVERY AND UTILIZATION SYSTEM - This invention provides a heat recovery and utilization system for efficiently utilizing heat recovered from boiler exhaust gas with a heat recovery unit without any complicated equipment or high operation costs. The heat recovery and utilization system includes: a boiler for electricity generation; a heat recovery unit for recovering heat from exhaust gas of the boiler; a heat exchanger for using heat recovered with the heat recovery unit as heat source for equipment other than for electricity generation; a heat accumulator for accumulating heat source for the equipment other than for electricity generation; and a heat medium circulation line in which heat medium circulates between the heat recovery unit and the heat exchanger to exchange the heat recovered with the heat recovery unit with the heat exchanger. Upon startup of the system, the heat exchanger preheats the heat recovery unit with heat source accumulated in the heat accumulator. | 09-26-2013 |
20140060459 | HEAT RECOVERY SYSTEM AND HEAT RECOVERY METHOD - A heat recovery system includes a preheater ( | 03-06-2014 |
20090013941 | TRI-SECTOR REGENERATIVE OXIDANT PREHEATER FOR OXY-FIRED PULVERIZED COAL COMBUSTION - A tri-sector regenerative oxidant preheater apparatus, method and arrangement for utilization with oxy-fired pulverized coal combustion power plants. The preheater includes a stationary housing and a rotor rotatably mounted in the housing. Sector plates are located at the axial ends of the rotor and divide the preheater into a flue gas sector, two primary oxidant sectors, and a secondary oxidant sector interposed between the two primary oxidant sectors. A primary oxidant fan is located downstream of the preheater to create a negative environment in the primary oxidant sectors. During operation of the preheater, the environments of the two primary oxidant sectors and the flue gas sector are at about the same negative pressure, and thus there is very limited leakage between the oxidant side and the flue gas side of the preheater. The environment of the secondary oxidant sector is at a positive pressure and leakage to the negative environment of the primary oxidant sectors will be that of secondary oxidant to primary oxidant with no loss secondary oxidant to the gas side of the preheater. | 01-15-2009 |
20120060774 | PREHEATER FOR COMBUSTION AIR, AND A POWER PLANT - A preheating device for combustion air in a boiler. First heat exchanger structures fitted in a flue gas duct heat primary air. A first air supply area in the wall of the flue gas duct supplies air to be heated to the first heat exchanger structures. Second heat exchanger structures fitted in a flue gas duct heat secondary air. A second air supply area in the wall of the flue gas duct supplies air to be heated to the second heat exchanger structures. The first air supply area is opposite the second air supply area. Also a power plant. | 03-15-2012 |
20130192540 | SYSTEM FOR COMBINED FLUE GAS HEAT RECOVERY AND DUST PRECIPITATION IMPROVEMENT AS RETROFIT SOLUTION FOR EXISTING COAL-FIRED POWER STATIONS - A power plant is suggested with an additional heat transfer between the flue gas that flows through a flue gas line ( | 08-01-2013 |
20130239909 | ARRANGEMENT STRUCTURE SUITABLE FOR INVERTED PULVERIZED COAL BOILER WITH ULTRA-HIGH STEAM TEMPERATURE STEAM PARAMETERS - The disclosure provides an arrangement structure suitable for an inverted pulverized coal boiler with ultra-high steam temperature steam parameters, including a hearth, wherein the hearth is communicated with a middle uplink flue, and the top of the middle uplink flue is communicated with that of a tail downlink flue. In the arrangement structure suitable for an inverted pulverized coal boiler with ultra-high steam temperature steam parameters, the hearth is connected with the middle uplink flue by a hearth outlet horizontal flue at the bottom, so that the high-temperature gas at the hearth outlet is drained to a low elevation and then flows upwards through the middle uplink flue; a final heating surface may be arranged at the low position of the hearth outlet horizontal flue and the middle uplink flue so as to reduce the length of the high-temperature steam pipeline between the final heating surface and the steam turbine, lower the manufacturing cost of the boiler as well as the frication and radiation loss of the pipe, improve the efficiency of the power generating unit and make the power generating unit possible to adopt ultra-high steam temperature steam parameters and/or double reheat system. | 09-19-2013 |
20080223315 | System and Method for Zero Emissions, Hydrogen Fueled Steam Generator - As we move towards a hydrogen economy or use hydrogen as an energy carrier, the need to get heat energy and steam out of the hydrogen is arising more frequently. This invention addresses that need without the atmospheric pollutants which would result from burning carbon based fuels or hydrogen freely in the air. Presented is an invention which has very high overall efficiency and generates no oxides of carbon and nearly zero nitrogen oxide compounds. The generated steam can be used for comfort heating, process heating, electric generation and other common applications requiring steam. The invention can also be used for generation of hot water. The process of steam generation is accomplished by precisely metering the mixing and oxidation of hydrogen and oxygen under controlled conditions. The result of this oxidation reaction is simply only water and heat, which are used to generate steam. | 09-18-2008 |
20100251975 | ECONOMICAL USE OF AIR PREHEAT - An economical heat recovery system [ | 10-07-2010 |
20120037097 | HIGH EFFICIENCY FEEDWATER HEATER - A feedwater heater ( | 02-16-2012 |
20130312671 | APPARATUS AND CONTROL METHOD FOR A HYBRID TANKLESS WATER HEATER - An on demand tankless water heater system that is capable of quickly delivering water within a desired temperature range. The tankless water heater provides a hybrid heating method that contains a primary heating system and a secondary heating system disposed in a buffer tank that cooperate to facilitate control of output water temperature during water usage. A pressure differential switch detects low flow demand and allows the secondary heating system to provide immediate heating to the water. This secondary heating system provides a faster temperature response and fine tuning of output water temperature. | 11-28-2013 |
20150114318 | MINIMIZING FOULING IN STEAM ASSISTED OIL PRODUCTION - Methods and systems generate steam for heavy oil recovery operations, wherein fouling is limited with the use of wire matrix turbulators in tubes with tendencies to foul. | 04-30-2015 |
20160025331 | CONDENSATE PREHEATER FOR WASTE HEAT STEAM GENERATOR - A condensate preheater for a waste-heat steam generator, including condensate preheater heating surfaces, around which exhaust gas of a gas turbine flows in operation in order to heat up water flowing in the condensate preheater heating surfaces, wherein a respective heat transfer coefficient of the condensate preheater heating surfaces is selected such that a surface temperature of the condensate preheater heating surfaces is above an exhaust gas dew point in operation, wherein the condensate preheater has a condensate preheater inlet and a condensate preheater outlet and the heat transfer coefficient at the condensate preheater inlet is reduced relative to the heat transfer coefficient at the condensate preheater outlet, is provided. | 01-28-2016 |
20090133643 | METHOD AND APPARATUS FOR STEAM GENERATION - A method, apparatus, and system and operation of surface equipment to generate steam while reducing the quantity of boiler blowdown and thereby increasing the amount of feedwater that is re-used or re-cycled in generating said steam. The present invention teaches that, on a sustained basis, the blowdown stream at the outlet of a once-through steam generator can be routed to the inlet of a second once-through steam generator that is in series with the first, that blowdown stream can be used to generate additional steam in the second once-through steam generator and further reduce the amount of blowdown, and that this can be accomplished without need of any treatment that reduces hardness or silica levels of the blowdown stream prior to its entering or during its entry into the inlet of the second once-through steam generator. The output of this second steam generator is a substantially dry saturated steam vapor stream and, complementarily, a blowdown stream whose mass rate has been reduced substantially from that of the blowdown stream exiting the first steam generator. | 05-28-2009 |
20100012050 | Boiler Water Cycle of a Fluidized Bed Reactor and a Fluidized Bed Reactor - A boiler water cycle of a fluidized bed boiler, preferably, a supercritical once-through-unit (OTU) boiler, includes a drop leg, a number of horizontal inlet headers, substantially having a length of the length of a front wall of the furnace of the boiler, arranged below the furnace, and panels of water tubes of the front wall and a rear wall, extensions of the water tubes being directly connected to the inlet headers, wherein each inlet header is in flow communication with a drop leg by way of an inlet duct connected to the end of the inlet header. The inlet headers include a front wall chamber below the front wall of the furnace, a rear wall chamber arranged below the rear wall of the furnace, and at least one grid chamber below the center part of the furnace grid in a wind box of the fluidized bed boiler. | 01-21-2010 |
20130180471 | TUBE ARRANGEMENT IN A ONCE-THROUGH HORIZONTAL EVAPORATOR - Disclosed herein is a once-through evaporator comprising an inlet manifold; one or more inlet headers in fluid communication with the inlet manifold; one or more tube stacks, where each tube stack comprises one or more inclined evaporator tubes; the one or more tube stacks being in fluid communication with the one or more inlet headers; where the inclined tubes are inclined at an angle of less than 90 degrees or greater than 90 degrees to a vertical; one or more outlet headers in fluid communication with one or more tube stacks; and an outlet manifold in fluid communication with the one or more outlet headers. | 07-18-2013 |
20130233255 | Furnace Tube Arrangement for Steam Generator - A furnace tube arrangement for a steam generator is described. A plurality of furnace tubes disposed longitudinally form a generally planar wall structure into which burner throats are let at least two longitudinally spaced levels in familiar manner. Burner throats at the respective levels are so disposed that a vertical mid-line of each throat at a first level is laterally offset from a vertical mid line of a corresponding throat at a second level. | 09-12-2013 |
20140041601 | STEAM GENERATOR - A steam generator is provided. The steam generator has a combustion chamber having a peripheral wall formed at least partially from gas-proof, welded steam generator pipes, at least two additional inner walls formed at least partially from additional steam generator pipes which are arranged inside the combustion chamber. The inner walls are connected one behind the other on the flow medium side by an intermediate collector. The steam generator has a high service life and is reliable. The flow medium on the inlet of the inner wall upstream of the intermediate collector has a lower temperature than that of the flow medium on an inlet of the peripheral wall. | 02-13-2014 |
20140083374 | FORCED FLOW STEAM GENERATOR HAVING WALL HEATING SURFACE AND METHOD FOR ITS OPERATION - The invention refers to a forced flow steam generator ( | 03-27-2014 |
20140123914 | ONCE-THROUGH STEAM GENERATOR - A once-through steam generator comprises a duct having an inlet end in communication with a source of a hot gas; and a tube bundle installed in the duct and comprising multiple heat transfer tubes. The tube bundle has an economizer section, an evaporator section, and a superheater section. A steam separating device may be positioned between the evaporator section and the superheater section, wherein, as part of a wet start-up, hot water collected by the steam separating device is delivered from the steam separating device to mix with cold feedwater before it is introduced into the economizer section. A start-up module may be positioned in the duct near the inlet end, wherein, as part of a dry start-up, cold feedwater is delivered into the start-up module to generate hot water that is then mixed into the feedwater stream before it is introduced into the economizer section. | 05-08-2014 |
20150034024 | RADIANT TO CONVECTION TRANSITION FOR FIRED EQUIPMENT - Modern steam generators typically include a radiant section and a convection section. Due to differing performance requirements of the radiant and convection sections, the radiant section often has a round cross-section, while the convection section often has a rectangular cross-section. Previous designs utilized a target wall to effect the transition. An angled transition section is disclosed herein that substantially eliminates the target wall and/or the reverse target and provides a corresponding improvement in steam generator efficiency. | 02-05-2015 |
20150090201 | CONDENSING HEAT EXCHANGER AND BOILER/WATER HEARTER INCLUDING THE SAME - The present invention relates to a condensing heat exchanger and a boiler/water heater including the same and, more particularly, to a condensing heat exchanger, which can increase a contact area between water and a combustion gas having high temperature and improve efficiency by passing a combustion gas, generated from a combustion chamber, through a plurality of exhaust pipes and which can be fabricated in a small and compact size, and a boiler/water heater including the same. | 04-02-2015 |
20160178189 | STEAM GENERATION APPARATUS AND ASSOCIATED CONTROL SYSTEM AND METHODS FOR STARTUP | 06-23-2016 |
20160178190 | ONCE-THROUGH STEAM GENERATOR | 06-23-2016 |
20160195261 | ONCE-THROUGH STEAM GENERATOR | 07-07-2016 |