| Entries |
| Document | Title | Date |
|---|
| 20090025422 | Controlling Liquefaction of Natural Gas - A gas liquefaction process, especially for producing LNG, maintains product flow rate and temperature by controlling the refrigeration so that variation to reduce any difference between actual and required product temperatures is initiated before variation of the product flow rate to reduce any difference between actual and required flow rates. | 01-29-2009 |
| 20090031755 | Natural gas liquefaction process to extend lifetime of gas wells - A variable speed liquid LNG expander (X | 02-05-2009 |
| 20090064712 | Method and Apparatus for Liquefying a Natural Gas Stream - The present invention relates to a method of liquefying a natural gas stream, wherein the natural gas stream ( | 03-12-2009 |
| 20090064713 | Method and Apparatus for Liquefying a Natural Gas Stream - The present invention relates to a method of liquefying a natural gas stream, wherein the natural gas stream ( | 03-12-2009 |
| 20090084132 | METHOD FOR PRODUCING LIQUEFIED NATURAL GAS - A method for liquefying natural gas using the pressure energy of the natural gas, wherein flash vapor from natural gas depressurization is employed in a refrigeration cycle for subcooling high pressure natural gas prior to flashing. | 04-02-2009 |
| 20090095018 | METHOD FOR LIQUEFYING A HYDROCARBON STREAM - A hydrocarbon stream is liquefied in a method wherein a feed stream is provided, from which feed stream a first stream and a second stream are produced. The first stream is liquefied in a main liquefaction system to provide a first liquefied stream, while the second stream is cooled separately to provide a cooled second stream. The first liquefied stream is combined with the cooled second stream to produce a combined stream, which is separated in a gas/liquid separator into a liquefied hydrocarbon product stream and a gaseous stream. The gaseous stream is warmed to a temperature of above −40° C. by heat exchanging against any other stream used in the method, wherein the warming of the gaseous stream employs at least heat exchanging against the second stream to provide at least part of the cooling of the second stream. | 04-16-2009 |
| 20090095019 | METHOD AND APPARATUS FOR LIQUEFYING A HYDROCARBON STREAM - A method of liquefying a hydrocarbon stream such as natural gas from a feed stream, the method at least comprising the steps of: (a) providing a feed stream ( | 04-16-2009 |
| 20090095020 | Liquefaction of Associated Gas at Moderate Conditions - A method is proposed for converting a portion of associated gas generated during crude oil production into a liquid form which permits the transport of a large amount of methane at moderate temperatures. | 04-16-2009 |
| 20090120127 | METHOD FOR PRODUCING LIQUEFIED NATURAL GAS - A method for liquefying natural gas using the pressure energy of the natural gas is provided, wherein flash vapor from natural gas depressurization is employed in a refrigeration cycle for subcooling high pressure natural gas prior to flashing. | 05-14-2009 |
| 20090158773 | Equipment and process for liquefaction of LNG boiloff gas - A design for equipment and process for reliquefaction of LNG boiloff gas, primarily for shipboard installation, has high thermodynamic efficiency and lower capital cost, smaller size (volume, footprint), lower weight, and less need for maintenance than systems utilizing the prior art. The main refrigerant gas compressor is reduced to a single stage turbocompressor. Optional elements include: compression of boiloff gas at ambient temperature; compression of boiloff gas in one or two stages; turboexpansion of refrigerant gas incorporating one or two turboexpanders; turboexpander energy recovery by mechanical loading, compressor drive, or electric generator; refrigerant sidestream for cooling at the lowest temperatures. | 06-25-2009 |
| 20090158774 | Equipment and process for liquefaction of LNG boiloff gas - A design for equipment and process for reliquefaction of LNG boiloff gas, primarily for shipboard installation, has high thermodynamic efficiency and lower capital cost, smaller size (volume, footprint), lower weight, and less need for maintenance than systems utilizing the prior art. The main refrigerant gas compressor is reduced to a single stage turbocompressor. Optional elements include: compression of boiloff gas at ambient temperature; compression of boiloff gas in one or two stages; turboexpansion of refrigerant gas incorporating one or two turboexpanders; turboexpander energy recovery by mechanical loading, compressor drive, or electric generator; refrigerant sidestream for cooling at the lowest temperatures. | 06-25-2009 |
| 20090241593 | METHOD AND APPARATUS FOR COOLING A HYDROCARBON STREAM - A method of liquefying natural gas from a feed stream ( | 10-01-2009 |
| 20090255294 | METHOD AND APPARATUS FOR LIQUEFYING A HYDROCARBON STREAM - Method and apparatus for liquefying a hydrocarbon stream such as natural gas. In the method, a hydrocarbon feed stream is passed through an NGL recovery system to separate the hydrocarbon feed stream into at least a methane-enriched overhead stream and a C | 10-15-2009 |
| 20100000253 | METHOD AND APPARATUS FOR THE RELIQUEFACTION OF A VAPOUR - Boiled off liquefied natural gas flows from a storage tank and is compressed in vapour compression stages. The resulting compressed vapour is condensed in a condenser and the condensate returned to the tank. The condenser is cooled by a working fluid, for example nitrogen, flowing in a Brayton cycle. The Brayton cycle includes a heat exchanger which removes heat of compression from the compressed natural gas vapour upstream of its passage through the condenser. In addition a part of the working fluid is withdrawn from a region of the Brayton cycle intermediate the working fluid outlet from the condenser and the working fluid inlet to the heat exchanger and the withdrawn working fluid flows through another heat exchanger in which it removes heat of compression from the natural gas vapour intermediate the compression stages. The withdrawn working fluid is returned to the Brayton cycle. | 01-07-2010 |
| 20100011808 | METHOD AND APPARATUS FOR LIQUEFYING A HYDROCARBON STREAM - Method of liquefying a hydrocarbon stream such as natural gas from a feed stream ( | 01-21-2010 |
| 20100031699 | METHOD AND APPARATUS FOR LIQUEFYING A HYDROCARBON STREAM - A method and apparatus for liquefying a hydrocarbon stream such as natural gas from a feed stream. A feed stream is provided and passed through at least two cooling stages. Each cooling stage involves one or more heat exchangers. One of the heat exchangers involves a first refrigerant circuit having a first refrigerant stream, and a second of the heat exchangers involves a second refrigerant circuit having a second refrigerant stream. The liquefied hydrocarbon stream is expanded and a flash vapour is separated to provide a liquefied hydrocarbon product stream and a gaseous stream. The gaseous stream, at least a part of the first refrigerant stream, and at least a part of the second refrigerant stream are passed through a heat exchanger, for the gaseous stream to provide cooling to the first and second refrigerant streams. | 02-11-2010 |
| 20100101272 | PROCESS OF LIQUEFYING A GASEOUS METHANE-RICH FEED FOR OBTAINING LIQUID NATURAL GAS - A process for liquefying a gaseous methane-rich feed ( | 04-29-2010 |
| 20100107684 | Natural Gas Liquefaction Process - The invention relates to a process for liquefying a gas stream rich in methane, said process comprising: (a) providing said gas stream; (b) withdrawing a portion of said gas stream for use as a refrigerant; (c) compressing said refrigerant; (d) cooling said compressed refrigerant with an ambient temperature cooling fluid; (e) subjecting the cooled, compressed refrigerant to supplemental cooling; (f) expanding the refrigerant of (e) to further cool said refrigerant, thereby producing an expanded, supplementally cooled refrigerant; (g) passing said expanded, supplementally cooled refrigerant to a heat exchange area; and, (h) passing said gas stream of (a) through said heat exchange area to cool at least part of said gas stream by indirect heat exchange with said expanded, supplementally cooled refrigerant, thereby forming a cooled gas stream. In further embodiments for improved efficiencies, additional supplemental cooling may be provided after one or more other compression steps. | 05-06-2010 |
| 20100122551 | Liquefaction Method and System - A method for liquefaction using a closed loop refrigeration system, the method comprising the steps of (a) compressing a gaseous refrigerant stream in at least one compressor; (b) cooling the compressed gaseous refrigerant stream in a first heat exchanger; (c) expanding at least a first portion of the cooled, compressed gaseous refrigerant stream from the first heat exchanger in a first expander to provide a first expanded gaseous refrigerant stream; and (d) cooling and substantially liquefying a feed gas stream to form a substantially liquefied feed gas stream in a second heat exchanger through indirect heat exchange against at least a first portion of the first expanded gaseous refrigerant stream from the first expander, wherein the first expanded gaseous refrigerant stream exiting the first expander is substantially vapor. | 05-20-2010 |
| 20100139316 | Operating System of Liquefied Natural Gas Ship for Subcooling and Liquefying Boil-Off Gas - An operating system of a liquefied natural gas ship for performing sub-cooled liquefaction of boil-off gas includes a boil-off gas compressor, a cryogenic heat exchanger connected to a refrigerator system, and a first check valve and a first pressure control valve, installed in a pipe between a liquefied natural gas phase separator and a gas combustion unit, and a second check valve and a second pressure control valve, installed in a parallel pipe connected to the pipe in parallel. The parallel pipe is connected to a pipe between the boil-off gas compressor and the cryogenic heat exchanger such that boil-off gas is supplied to an upper vapor region of the liquefied natural gas phase separator. Thus, pressure and level of the liquefied natural gas phase separator are stably controlled. Power consumption is effectively reduced, and economical efficiency is achieved by stable operating pressure and level of the liquefied natural gas phase separator. | 06-10-2010 |
| 20100154470 | Method and system for producing liquefied natural gas (LNG) - A method and system for optimizing the efficiency of an LNG liquification system of the gas expansion type, wherein an incoming feed gas is first separated in a fractionation column by counter current contact with a cold reflux fluid, and a gaseous stream introduced into the heat exchanger system at a reduced temperature such that an intermediate pinch point is created in the warm composite curve. | 06-24-2010 |
| 20100186447 | METHOD AND APPARATUS FOR CONTROLLING THE TURNDOWN OF A COMPRESSOR FOR A GASEOUS HYDROCARBON STREAM - A method of controlling the turndown of a compressor ( | 07-29-2010 |
| 20100223951 | METHOD AND APPARATUS FOR COOLING A HYDROCARBON STREAM - A method of cooling a hydrocarbon stream such as natural gas from a feed stream ( | 09-09-2010 |
| 20100263406 | METHOD AND APPARATUS FOR COOLING AND LIQUEFYING A HYDROCARBON STREAM - Method of driving two or more refrigerant compressors in a hydrocarbon cooling process. In such a hydrocarbon cooling process a hydrocarbon feed stream ( | 10-21-2010 |
| 20100275644 | NATURAL GAS LIQUEFACTION PLANT AND MOTIVE POWER SUPPLY EQUIPMENT FOR SAME - A power supply equipment ( | 11-04-2010 |
| 20100275645 | METHOD AND APPARATUS FOR COOLING A PROCESS STREAM - The invention provides a method of cooling a process stream, the method comprising at least the steps of: (a) heat exchanging a first coolant supply stream in a first cooling circuit against a process stream at a first process temperature to produce a first coolant return stream and a cooled process stream; (b) passing the first coolant return stream to a first coolant return tank to provide warmed first coolant; (c) withdrawing a portion of the warmed first coolant from the first coolant return tank as a warmed first coolant stream; (d) heat exchanging a cooled second coolant stream in a second cooling circuit against the warmed first coolant stream to produce a cooled first coolant stream, (e) passing the cooled first coolant stream to a first coolant supply tank to provide cooled first coolant; (f) withdrawing a portion of the cooled first coolant from the first coolant supply tank as the first coolant supply stream; wherein the rate of flow of the warmed first coolant stream in step (c) is controlled in response to the cooling duty available from the second cooling circuit and the flow from the supply to the return buffer is controlled by the required cooling of the process stream and wherein the difference between the minimum and maximum cooling duty of the process stream over a time period is larger than the difference between the minimum and maximum cooling duty of the second cooling circuit over said time period. | 11-04-2010 |
| 20100300144 | Liquefied Gas Expander And Integrated Joule-Thomson Valve - A cryogenic turbine expander system which consists essentially of a cryogenic liquid pressure vessel, and the vessel further accommodating a turbine expander, an internal bypass configuration, which are operable in parallel, a three-way valve to direct incoming high pressure liquefied gas flow to the turbine expander, or the internal bypass configuration, which further consists a Joule-Thomson valve, when the turbine expander is not operational. | 12-02-2010 |
| 20100319396 | METHOD AND APPARATUS FOR LIQUEFYING HYDROCARBON STREAMS - A method of cooling at least two hydrocarbon streams such as natural gas, the method at least comprising the steps of: (a) providing at least first and second hydrocarbon streams ( | 12-23-2010 |
| 20110011127 | Process for Controlling Liquefied Natural Gas Heating Value - Process for efficiently operating a natural gas liquefaction system with integrated heavies removal/natural gas liquids recovery to produce liquefied natural gas (LNG) and/or natural gas liquids (NGL) products. | 01-20-2011 |
| 20110056237 | METHOD AND APPARATUS FOR LIQUEFYING A HYDROCARBON STREAM - Method and apparatus for liquefying a hydrocarbon stream. A liquefaction system comprises at least an NGL recovery system | 03-10-2011 |
| 20110067440 | METHOD OF COOLING AND LIQUEFYING A HYDROCARBON STREAM, AN APPARATUS THEREFOR, AND A FLOATING STRUCTURE, CAISSON OR OFF-SHORE PLATFORM COMPRISING SUCH AN APPARATUS - A method and apparatus for cooling and liquefying a hydrocarbon stream using a liquefaction process wherein a hydrocarbon stream is cooled and at least partially liquefied to obtain a liquefied hydrocarbon stream. In the method, one or more compressors are driven with one or more electric drivers, that are powered with one or more dual-fuel diesel-electric generators. These dual-fuel diesel-electric generations are operated by passing one or more hydrocarbon fuel streams to the one or more dual-fuel diesel-electric generators, wherein at least one of the one or more hydrocarbon fuel streams comprises a stream that is generated in the liquefaction process. The apparatus may be provided on a floating structure, a caisson, or off-shore platform. | 03-24-2011 |
| 20110094262 | COMPLETE LIQUEFACTION METHODS AND APPARATUS - A method and apparatus are described to provide complete gas utilization in the liquefaction operation from a source of gas without return of natural gas to the source thereof from the process and apparatus. The mass flow rate of gas input into the system and apparatus may be substantially equal to the mass flow rate of liquefied product output from the system, such as for storage or use. | 04-28-2011 |
| 20110094263 | METHODS OF NATURAL GAS LIQUEFACTION AND NATURAL GAS LIQUEFACTION PLANTS UTILIZING MULTIPLE AND VARYING GAS STREAMS - A method of natural gas liquefaction may include cooling a gaseous NG process stream to form a liquid NG process stream. The method may further include directing the first tail gas stream out of a plant at a first pressure and directing a second tail gas stream out of the plant at a second pressure. An additional method of natural gas liquefaction may include separating CO | 04-28-2011 |
| 20110113825 | DUAL NITROGEN EXPANSION PROCESS - A method of natural gas liquefaction comprising first and second nitrogen refrigerant streams, each stream under-going a cycle of compression, cooling, expansion and heating, during which the first nitrogen stream is expanded to a first, intermediate pressure and the second nitrogen stream is expanded to a second, lower pressure, and the heating occurs in one or more heat exchangers in which at least one of the expanded nitrogen streams is in heat exchanging relationship with natural gas, wherein, in at least one of said one or more heat exchangers, the first and second expanded nitrogen streams are in a heat exchanging relationship with the natural gas and both the first and second compressed nitrogen streams. The liquefaction can occur in three stages: in an initial stage the heated, expanded first nitrogen stream and the heated, expanded second nitrogen stream are used to cool the natural gas; in an intermediate stage the compressed first nitrogen stream is expanded to an intermediate pressure and used to cool the natural gas; and in a final stage the compressed, second nitrogen stream is expanded to a low pressure and used to cool the natural gas. | 05-19-2011 |
| 20110126584 | METHOD AND APPARATUS FOR TREATING A HYDROCARBON STREAM AND METHOD OF COOLING A HYDROCARBON STREAM - Method and apparatus for treating a mixed hydrocarbon feed stream ( | 06-02-2011 |
| 20110203312 | METHOD AND SYSTEM FOR OPTIMIZED LNG PRODUCTION - A method and system for producing liquefied and sub-cooled natural gas by means of a refrigeration assembly using a single phase gaseous refrigerant comprising: at least two expanders ( | 08-25-2011 |
| 20110209496 | SYSTEM FOR COMBINED CYCLE MECHANICAL DRIVE IN CRYOGENIC LIQUEFACTION PROCESSES - A system for producing liquefied and sub-cooled natural gas by means of a refrigeration assembly using a single phase gaseous refrigerant comprises at least two expanders; a compressor assembly; a heat exchanger assembly for heat absorption from natural gas; and a heat rejection assembly, in which the expanders are arranged in expander loops and the refrigerant to the respective expander is served in a compressed flow by means of the compressor assembly having compressors or compressor stages enabling adapted inlet and outlet pressures for the respective expander. According to the present the expanders and compressors assembly are assembled in two mechanically connected compressor and expander packages of which one is driven by a gas turbine and the other is driven by a steam turbine, the steam primarily being generated by exhaust gases from the gas turbine in a waste heat recovery unit, and in that the expanders and compressors assemblies are distributed between the two compressor and expander packages to optimize the steam utilization and to balance the power generated by the gas turbine and the steam turbine. | 09-01-2011 |
| 20110226008 | INTEGRATED PRE-COOLED MIXED REFRIGERANT SYSTEM AND METHOD - A system and method for cooling and liquefying a gas in a heat exchanger that includes compressing and cooling a mixed refrigerant using first and last compression and cooling cycles so that high pressure liquid and vapor streams are formed. The high pressure liquid and vapor streams are cooled in the heat exchanger and then expanded so that a primary refrigeration stream is provided in the heat exchanger. The mixed refrigerant is cooled and equilibrated between the first and last compression and cooling cycles so that a pre-cool liquid stream is formed and subcooled in the heat exchanger. The stream is then expanded and passed through the heat exchanger as a pre-cool refrigeration stream. A stream of gas is passed through the heat exchanger in countercurrent heat exchange with the primary refrigeration stream and the pre-cool refrigeration stream so that the gas is cooled. A resulting vapor stream from the primary refrigeration stream passage and a two-phase stream from the pre-cool refrigeration stream passage exit the warm end of the exchanger and are combined and undergo a simultaneous heat and mass transfer operation prior to the first compression and cooling cycle so that a reduced temperature vapor stream is provided to the first stage compressor so as to lower power consumption by the system. Additionally, the warm end of the cooling curve is nearly closed further reducing power consumption. Heavy components of the refrigerant are also kept out of the cold end of the process, reducing the possibility of refrigerant freezing, as well as facilitating a refrigerant management scheme. | 09-22-2011 |
| 20110226009 | PROCESS FOR PRODUCING LIQUID AND GASEOUS NITROGEN STREAMS, A GASEOUS STREAM WHICH IS RICH IN HELIUM AND A DENITRIDED STREAM OF HYDROCARBONS AND ASSOCIATED INSTALLATION - This process includes the cooling of an introduction stream ( | 09-22-2011 |
| 20110259045 | Power Matched Mixed Refrigerant Compression Circuit - A refrigerant compressor circuit for use in a liquefaction plant includes a first compression string driven by a first driver; a second compression string driven by a second driver, a pre-cooling refrigerant compression stage arranged in the first compression string to receive a stream of pre-cooling refrigerant at an inlet pressure and discharge the pre-cooling refrigerant at an outlet pressure, a first compression stage arranged in the first compression string to compress a mixed refrigerant gas from a first pressure to a second pressure, and, a second compression stage arranged in the second compression string to compress the mixed refrigerant gas from the second pressure to a third pressure. The pre-cooling refrigerant compression stage and the first compression stage of the circuit are co-axially mounted on a first shaft drivingly coupled to a first driver in the first compression string. | 10-27-2011 |
| 20110277498 | METHOD AND APPARATUS FOR CONTROLLING A REGRIGERANT COMPRESSOR, AND USE THEREOF IN A METHOD OF COOLING A HYDROCARBON STREAM - A method of controlling one or more refrigerant compressors ( | 11-17-2011 |
| 20120036888 | METHOD AND SYSTEM FOR THE SMALL-SCALE PRODUCTION OF LIQUIFIED NATURAL GAS (LNG) AND COLD COMPRESSED GAS (CCNG) FROM LOW-PRESSURE NATURAL GAS - A system for the production of LNG from low-pressure feed gas sources, at small production scales and at lower energy input costs. A system for the small-scale production of cold compressed natural gas (CCNG). A method of dispensing natural gas from stored CCNG, comprising: dispensing CCNG from a CCNG storage tank; pumping the CCNG by a cryogenic liquid pump to a pressure suitable for compressed natural gas dispensing and storage in on-vehicle compressed natural gas storage tanks; recovering cold from the CCNG by heat exchange with natural gas feeding the natural gas production plant to replace dispensed product. A system for the storage, transport, and dispensing of natural gas, comprising: means for handling natural gas in a CCNG state where the natural gas is a non-liquid, but is dense-enough to allow for pumping to pressure by a cryogenic liquid pump. | 02-16-2012 |
| 20120067080 | Mixed Refrigerant Compression Circuit - A refrigerant circuit includes a first compression stage for compressing a mixed refrigerant gas, the first compression stage including at least a first compressor body and a second parallel compressor body, each compressor body including a suction inlet and an outlet, a first distribution means for splitting the flow of refrigerant gas to the first stage of compression across the at least two parallel compressor bodies, such that a first stream of refrigerant gas is fed to the suction inlet of the first compressor body and a second stream of refrigerant gas is fed to the suction inlet of the second compressor body, a second compression stage for compressing the mixed refrigerant gas, and a first merging means for recombining the first stream of refrigerant gas with the second stream of refrigerant gas downstream of the first compression stage for delivery to the second compression stage. | 03-22-2012 |
| 20120090350 | Configurations and Methods of Heating Value Control in LNG Liquefaction Plant - NGL recovery from natural gas is achieved by processing the natural gas in a scrub column that operates at high pressure. A C3+ depleted vapor stream is generated from the vapor portion of partially condensed scrub column overhead and expanded to provide refrigeration for the vapor portion to so form a second reflux stream and the C3+ depleted vapor stream. The C3+ depleted vapor stream is then combined with another vapor portion of partially condensed column overhead to produce a lean liquefaction feed stream. | 04-19-2012 |
| 20120090351 | METHOD OF COOLING A HYDROCARBON STREAM AND APPARATUS THEREFOR - Method and apparatus for cooling a hydrocarbon stream ( | 04-19-2012 |
| 20120103010 | System and Method for Producing LNG from Contaminated Gas Streams - A system and method for removing nitrogen and producing liquefied natural gas (“LNG”) from methane without the need for external refrigeration. The invention also relates to a system and method for removing nitrogen from methane and for producing liquefied nitrogen in addition to LNG. The system and method of the invention are particularly suitable for use in recovering and processing comparatively small volumes of methane from coal mines or from flash gas captured at an LNG loading site. | 05-03-2012 |
| 20120103011 | METHOD AND APPARATUS FOR PRODUCING A COOLED HYDROCARBON STREAM - Method and apparatus for producing a cooled hydrocarbon stream ( | 05-03-2012 |
| 20120118008 | METHOD OF PRODUCING A COMBINED GASEOUS HYDROCARBON COMPONENT STREAM AND LIQUID HYDROCARBON COMPONENT STREAMS, AND AN APPARATUS THEREFOR - First and second multi-phase streams are processed in first and second trains that are structurally different from each other such that the first and second trains have different operating conditions. The first and second trains produce first and second gaseous hydrocarbon streams and first and second liquid hydrocarbon component streams. The first and second gaseous hydrocarbon streams are combined downstream of the first and second trains to provide a combined gaseous hydrocarbon component stream. | 05-17-2012 |
| 20120131950 | Arrangement for Liquefying Natural Gas and Method for Starting Said Arrangement - An arrangement for liquefying natural gas is provided. The arrangement includes a gas turbine unit that includes a gas turbine compressor, a steam turbine unit, a first compressor unit, a shiftable clutch, a heated steam generator for supplying steam to the steam turbine unit, and a second compressor unit. The steam turbine unit and the first compressor unit have a common, rigidly connected first shaft assembly, while the gas turbine unit and the second compressor unit have a common, rigidly connected second shaft assembly. In order to increase economic efficiency, the first shaft assembly and the second shaft assembly are operable to be connected to and disconnected from each other using the clutch. A suitable method for starting said arrangement is also provided. | 05-31-2012 |
| 20120137726 | NGL Recovery from Natural Gas Using a Mixed Refrigerant - An NGL recovery facility utilizing a single, closed-loop mixed refrigerant cycle for recovering a substantial portion of the C | 06-07-2012 |
| 20120167618 | USE OF REFRIGERATION LOOPS TO CHILL INLET AIR TO GAS TURBINE - As described herein, a method and system for operating a refrigeration system are provided. In the present methods and systems, a portion of the refrigerant from the refrigeration system is used for reducing the temperature of inlet air entering the gas turbine. The refrigeration system disclosed herein can be used for LNG production, air separation, food storage, or ice-making. | 07-05-2012 |
| 20120167619 | METHOD TO MAXIMIZE LNG PLANT CAPACITY IN ALL SEASONS - As described herein, a method and system for operating a liquefied natural gas (LNG) plant are provided. The method and system also provide for domestic natural gas production. In the present methods and systems, substantially all of the natural gas produced from a well or formation is processed to form LNG; a portion of the LNG produced is regasified; and the regasification is utilized to cool the inlet air to the gas turbines in the LNG plant, either directly or indirectly. | 07-05-2012 |
| 20120198883 | Method for cooling a single-component or multi-component stream - The invention relates to a method for cooling a single-component or multi-component stream, in particular a hydrocarbon-rich fraction, by indirect heat exchange with the refrigerant mixture of a refrigerant mixture circuit. The refrigerant mixture is compressed in at least two stages and is separated into a lower-boiling refrigerant mixture fraction compressed to the ultimate pressure of the refrigerant mixture circuit and at least one higher-boiling refrigerant mixture fraction compressed to an intermediate pressure. The latter is pumped (P | 08-09-2012 |
| 20120204598 | INTEGRATED WASTE HEAT RECOVERY IN LIQUEFIED NATURAL GAS FACILITY - The present invention relates to a process and apparatus for liquefying natural gas. In another aspect the present invention relates to the heat recovery from a turbine in a liquefied natural gas facility. | 08-16-2012 |
| 20120266630 | METHOD FOR FRACTIONATING A STREAM OF CRACKED GAS TO OBTAIN AN ETHYLENE-RICH CUT AND A STREAM OF FUEL, AND RELATED INSTALLATION - This method includes introducing a downstream stream ( | 10-25-2012 |
| 20130061633 | CONFIGURATIONS AND METHODS OF INTEGRATED NGL RECOVERY AND LNG LIQUEFACTION - Contemplated plants include a NGL recovery portion and a LNG liquefaction portion, wherein the NGL recovery portion provides a low-temperature and high-pressure overhead product directly to the LNG liquefaction portion. Feed gas cooling and condensation are most preferably performed using refrigeration cycles that employ refrigerants other than the demethanizer/absorber overhead product. Thus, cold demethanizer/absorber overhead product is compressed with the turbo-expansion and delivered to a liquefaction portion at significantly lower temperature and higher pressure without net compression energy expenditure. | 03-14-2013 |
| 20130192297 | CONFIGURATIONS AND METHODS FOR SMALL SCALE LNG PRODUCTION - A small scale natural gas liquefaction plant is integrated with an LNG loading facility in which natural gas is liquefied using a multi-stage gas expansion cycle. LNG is then loaded onto an LNG truck or other LNG transport vehicle at the loading facility using a differential pressure control system that uses compressed boil off gas as a motive force to move the LNG from the LNG storage tank to the LNG truck so as to avoid the use of an LNG pump and associated equipment as well as to avoid venting of boil off vapors into the environment. | 08-01-2013 |
| 20130247610 | METHOD OF PREPARING A COOLED HYDROCARBON STREAM AND AN APPARATUS THEREFOR - A partially condensed hydrocarbon feed stream is sent to a column. An overhead vapour hydrocarbon stream from the column is then partially condensed by indirect heat exchanging against an expanded cooling fluid flowing through a first section of a cold side heat exchanging channel. The cooling fluid consists of a mixed refrigerant composition, and liquid from the expanded cooling fluid is continuously transformed to vapour thereby forming a residual liquid portion of not evaporated expanded cooling fluid. The residual liquid is used to progressively condense the hydrocarbon feed stream to produce the partially condensed hydrocarbon feed stream that is sent to the column, by allowing the hydrocarbon feed stream to lose heat to the residual liquid passing through a second section of the cold side heat exchanging channel. The liquid component that is condensed out of the overhead vapour hydrocarbon stream is used as reflux for the column. | 09-26-2013 |
| 20130269386 | Natural Gas Liquefaction With Feed Water Removal - A method and apparatus for drying and liquefying a natural gas stream is described, in which: (a) the water containing natural gas feed stream is cooled; (b) the cooled natural gas feed stream is dried and further cooled; (c) the dried cooled natural gas stream is heated; (d) the dried rewarmed natural gas stream is cooled and liquefied and at least one compressed refrigerant feed stream is cooled by counter-current indirect heat exchange with an expanded cold refrigerant; and (e) the compressed cold refrigerant stream or streams are expanded, and thereby further cooled, to provide said expanded cold refrigerant; wherein the cooling of the natural gas feed stream in step (a) and heating of the dried cooled natural gas stream in step (c) is by indirect heat exchange between said two streams. | 10-17-2013 |
| 20130340475 | NATURAL GAS LIQUEFACTION EMPLOYING INDEPENDENT REFRIGERANT PATH - A method of liquefying natural gas. The method comprises cooling a gaseous natural gas process stream with a refrigerant flowing in a path isolated from the natural gas process stream. The refrigerant may differ in composition from a composition of the natural gas process stream, and the refrigerant composition may be selected to enhance efficiency of the refrigerant path with regard to a specific composition of the natural gas process stream. The refrigeration path may be operated at pressures, temperatures and flow rates differing from those of the natural gas process stream. Other methods of liquefying natural gas are described. A natural gas liquefaction plant is also described. | 12-26-2013 |
| 20140026612 | Method and Apparatus for Liquefying a CO2-Rich Gas - This invention relates to a method for liquefying a gas containing at least 60 mol % of CO2, in order to produce at least one liquid product, wherein the gas is cooled in order to form a fluid flow, at least a portion of the liquid or supercritical flow is cooled in a heat exchanger in order to form a cycle fluid having a cycle pressure, the cycle fluid is divided into at least two fractions including an auxiliary fraction, one of the fractions being expanded up to a first pressure in a valve in order to form a biphasic mixture, and then sent to a phase separator. The liquid fraction of the phase separator is vaporized so as to form a vaporized gas in the exchanger, the vaporized gas then being expanded from the first pressure to a second pressure in an expansion means, and then compressed in the cycle compressor and mixed with the first feed gas. | 01-30-2014 |
| 20140102133 | METHOD OF COOLING BOIL OFF GAS AND AN APPARATUS THEREFOR - The disclosure relates to a method and apparatus for cooling, preferably liquefying a boil off gas (BOG) stream from a liquefied cargo in a floating transportation vessel, said liquefied cargo having a boiling point of greater than −110° C. at 1 atmosphere and comprising a plurality of components, said method comprising at least the steps of: compressing a boil off gas stream ( | 04-17-2014 |
| 20140157824 | METHOD FOR IMPROVED THERMAL PERFORMING REFRIGERATION CYCLE - An improved refrigeration cycle is provided. The cycle provides for improved thermal performance by incorporating a refrigerant makeup tank that introduces liquid refrigerant with expanded refrigerant upstream of the heat exchanger, thereby providing a savings in either electricity costs or refrigerant. | 06-12-2014 |
| 20140245780 | MULTI NITROGEN EXPANSION PROCESS FOR LNG PRODUCTION - A method of natural gas liquefaction includes at least two nitrogen refrigerant streams. Each stream undergoes a cycle of compression, cooling, expansion and heating, during which each of the nitrogen streams is expanded to a different pressure other than for the others of the at least two nitrogen streams, and, | 09-04-2014 |
| 20140283549 | Method of Gas Expansion Using Liquefied Gas Expander and Integrated Joule-Thomson Valve - A cryogenic turbine expander system which consists essentially of a cryogenic liquid pressure vessel, and the vessel further accommodating a turbine expander, an internal bypass configuration, which are operable in parallel, a three-way valve to direct incoming high pressure liquefied gas flow to the turbine expander, or the internal bypass configuration, which further consists a Joule-Thomson valve, when the turbine expander is not operational. | 09-25-2014 |
| 20140305160 | SYSTEM AND PROCESS FOR NATURAL GAS LIQUEFACTION - Embodiments of the present invention provide a process for liquefaction of a natural gas. The process includes cooling the natural gas with a first refrigerant provided by a first cooling system and cooling the natural gas with a second refrigerant provided by a second cooling system. The second cooling system is a single phase cooling system. The first and second cooling systems operate independently from each other. The second refrigerant is cooled with the first refrigerant so that the cooling capacity of the second refrigerant and the second cooling system is increased. | 10-16-2014 |
| 20140318178 | METHOD AND APPARATUS FOR THE LIQUEFACTION OF NATURAL GAS - A method for the liquefaction of natural gas, comprising: taking unpurified natural gas from a gas well; pre-treating the gas for removing impurities; performing a first compression stage; performing a first heat exchange stage; performing a second compression stage; performing a second heat exchange stage; performing a third compression stage; performing a third heat exchange stage; performing an additional regeneration heat exchange stage; performing a first main independent heat exchange cycle; performing a second main heat exchange cycle; passing the gas through a Joule-Thomson valve; sending the liquefied gas to storage; injecting the portion of the gas in the gaseous state into the second main heat exchange stage; and the remaining gas in the gaseous state is injected into the first main heat exchange stage. | 10-30-2014 |
| 20150107297 | TEMPERATURE CONTROLLED METHOD TO LIQUEFY GAS AND A PRODUCTION PLANT USING THE METHOD - A method for liquefying gas involving pre-treating the gas stream in a pre-treater to remove impurities, and then passing the gas stream through a first flow path of a first heat exchanger to lower a temperature of the gas stream. The gas stream is then passed through the gas expansion turbine to lower a pressure of the gas stream and further decrease the temperature of the gas stream. The gas stream is then passed into a primary separator to separate the gas stream into a liquid stream and a cold gas stream. The liquid stream is collected. Selected quantities of the cold gas stream are passed through a second flow path of the first heat exchanger whereby a heat exchange takes place to cool the gas stream flowing through the first flow path to maintain the temperature of the gas stream entering the gas expansion turbine at a temperature which promotes the production of liquids. | 04-23-2015 |
| 20150143843 | INTEGRATION OF A SMALL SCALE LIQUEFACTION UNIT WITH AN LNG PLANT TO CONVERT END FLASH GAS AND BOIL-OFF GAS TO INCREMENTAL LNG. - Disclosed is a method of retrofitting a full-scale LNG plant to enhance the LNG production capacity of the LNG plant and a method for operating such a retrofit plant. A small scale LNG plant having a capacity less than 2 MTPA can be integrated with a main LNG plant having a capacity of at least 4 MTPA such that end flash gas and boil off gas from the main LNG plant can be liquefied by the small scale LNG plant as incremental LNG. It has been found that the production capacity of the integrated system can be improved by increasing the temperature of the gas stream exiting the main cryogenic heat exchanger of the main LNG plant between 5° C. and 30° C. as compared with the design temperature. | 05-28-2015 |
| 20150300731 | METHOD OF TREATING A HYDROCARBON STREAM COMPRISING METHANE, AND AN APPARATUS THEREFOR - A wet hydrocarbon stream comprising at least methane and water is dried thereby forming an effluent stream and a wet disposal stream. Before drying the wet hydrocarbon stream is cooled by indirectly heat exchanging against the effluent stream followed by indirectly heat exchanging against an auxiliary refrigerant stream. The effluent stream is subsequently passed to a further heat exchanger where the effluent stream is cooled against an evaporating refrigerant stream which is subsequently discharged from the further heat exchanger as a spent refrigerant stream. A refrigerant stream in compressed condition is formed by compressing the spent refrigerant and the auxiliary refrigerant stream that is discharged from the indirectly heat exchanging with the wet hydrocarbon stream, whereby allowing direct heat exchanging between the discharged auxiliary refrigerant stream and the spent refrigerant stream before said compressing. | 10-22-2015 |
| 20150345858 | Method to Produce LNG at Gas Pressure Letdown Stations in Natural Gas Transmission Pipeline Systems - There is described a method to produce LNG at gas pressure letdown stations. A high pressure gas stream is pre-cooled, dewatered, and then divided into two streams: a diverted LNG production stream (LNG stream) and a gas to end users stream (User stream). Carbon dioxide is removed from the LNG stream and the LNG stream is compressed. The LNG stream is then precooled by passing through one or more heat exchangers. Hydrocarbon condensate is removed from the LNG steam by passing the LNG stream through a first Knock Out drum. The LNG stream is then depressured by passing through a JT valve to depressurize the gas vapour exiting the first Knock Out drum and discharge it into a second Knock Out drum where the LNG is captured. | 12-03-2015 |
| 20150354887 | LIQUEFIED GAS PRODUCTION FACILITY - A liquefied gas production facility includes a plurality of liquefied gas producers which produce liquefied gas by removing an unnecessary substance and liquefying feed gas containing methane as a main component. | 12-10-2015 |
| 20150369534 | Natural Gas Isobaric Liquefaction Apparatus - This invention is about a natural gas isobaric liquefaction apparatus, which is based on the Rankine cycle system of similar thermal energy power circulation apparatus at cryogenic side, a cryogenic liquid pump is used to input power and the refrigerant makes up cold to the natural gas liquefying apparatus, so as to realize the isobaric liquefaction of natural gas. The natural gas liquefying apparatus of this invention can save energy by over 30% as compared with the traditional advanced apparatus with the identical refrigerating capacity, therefore it constitutes a breakthrough to the traditional natural gas liquefaction technology, with substantial economic, social and environmental protection benefits. | 12-24-2015 |
| 20160003528 | STATION FOR REDUCING GAS PRESSURE AND LIQUEFYING GAS - The invention relates to a station comprising an expansion turbine | 01-07-2016 |
| 20160040927 | INTEGRALLY-GEARED COMPRESSORS FOR PRECOOLING IN LNG APPLICATIONS - A natural gas liquefaction system is disclosed, which comprises at least a pre-cooling loop, through which a first refrigerant is adapted to circulate. The pre-cooling loop comprises at least one compressor for pressurizing the first refrigerant; at least one prime mover for driving the compressor; at least one condenser for removing heat from the first refrigerant; at least a first expansion element for expanding the first refrigerant; at least a first heat exchanger for transferring heat from natural gas to the first refrigerant. The system further comprises at least a cooling loop, downstream of the pre-cooling loop, where through a second refrigerant circulates. The natural gas is adapted to be sequentially cooled in the pre-cooling loop and in the cooling loop. The compressor of the pre-cooling loop is an integrally-geared turbo-compressor comprising a plurality of compressor stages. | 02-11-2016 |
| 20160040928 | Flexible Liquefied Natural Gas Plant - The present techniques are directed to a flexible liquefied natural gas (LNG) plant that may be tied to an external electric grid for importing or exporting electric power. Exemplary embodiments provide a method for producing LNG that includes producing a base load capacity of refrigeration capacity for LNG production from a first compression system. Electricity may be produced from a second compressor string if electricity is needed by an external power grid, or a second amount of refrigeration capacity may be provided by the second compressor string is natural gas feed is available and the external grid does not need power. | 02-11-2016 |
| 20160054053 | PROCESS FOR COOLING A HYDROCARBON-RICH FRACTION - A process for cooling a hydrocarbon-rich fraction, in particular natural gas, against a refrigerant circuit. In this process, the compressed refrigerant is divided into three refrigerant substreams. Whereas the first substream is work-producingly expanded in a warm expander and the second substream is work-producingly expanded in a cold expander, the third substream is work-producingly expanded at the lowest temperature level. The result therefrom is that the operating point of the cold expander is shifted in such a manner that the refrigeration output of the two expanders is situated in a ratio between 40/60 and 60/40. | 02-25-2016 |
| 20160061518 | DUAL MIXED REFRIGERANT SYSTEM - Processes and systems are provided for recovering a liquefied natural gas (LNG) stream from a hydrocarbon-containing feed gas stream using dual closed-loop mixed refrigerant cycles. In particular, the processes and systems described herein can be used to efficiently and effectively liquefy methane from a hydrocarbon-containing feed gas stream with the use of a first refrigeration system and a second refrigeration system utilizing a first mixed refrigerant and a second mixed refrigerant. Furthermore, the first refrigeration system and second refrigeration system may be in fluid communication with a turboexpander and separator. | 03-03-2016 |
| 20160076808 | METHOD AND SYSTEM FOR TREATING AND LIQUEFYING NATURAL GAS - A method for liquefying natural gas comprises: condensing at least a portion of a natural gas feed stream to produce a partially condensed stream; and separating the partially condensed stream into a first liquid fraction and a first vapour fraction; wherein the first liquid fraction comprises liquefied natural gas. | 03-17-2016 |
| 20160097584 | METHOD FOR ETHANE LIQUEFACTION - The process for ethane liquefaction can include a mixed refrigerant containing heavy hydrocarbons (e.g., butane and/or pentane) using compression without interstage cooling, or cooling only after the first compression stages where there is no liquid formation yet, such that the number of liquid recycle loops are reduced. The lack of cooling in the compressor reduces the compressor's mechanical efficiency; however, this is offset by having a more thermodynamically efficient process cycle because the cycle can operate as a mixed refrigerant rather than cascade. | 04-07-2016 |
| 20160097585 | APPARATUS FOR ETHANE LIQUEFACTION - The apparatus for ethane liquefaction can include a mixed refrigerant refrigeration cycle having inline compression without interstage cooling, or cooling only after the first compression stages where there is no liquid formation yet, such that the number of liquid recycle loops are reduced. The lack of cooling in the compressor reduces the compressor's mechanical efficiency; however, this is offset by having a more thermodynamically efficient process cycle because the cycle can operate as a mixed refrigerant rather than cascade. | 04-07-2016 |
| 20160097586 | METHOD FOR ETHANE LIQUEFACTION WITH DEMETHANIZATION - The process for liquefying a gaseous stream received from a pipeline that is comprised predominantly of ethane and a relatively small amount of other components by using a mixed refrigerant loop incorporating heavy hydrocarbons, as well as a distillation column to remove constituents lighter than ethane. | 04-07-2016 |
| 20160097587 | APPARATUS FOR ETHANE LIQUEFACTION WITH DEMETHANIZATION - The apparatus for liquefying a gaseous stream received from a pipeline that is comprised predominantly of ethane and a relatively small amount of other components by using a mixed refrigerant refrigeration cycle loop incorporating heavy hydrocarbons, as well as a distillation column to remove constituents lighter than ethane. | 04-07-2016 |
| 20160097588 | METHOD FOR ETHANE LIQUEFACTION WITH DEMETHANIZATION - The process for liquefying a gaseous stream received from a pipeline that is comprised predominantly of ethane and a relatively small amount of other components by using a mixed refrigerant loop incorporating heavy hydrocarbons (butane, and/or pentane), as well as a distillation column to remove constituents lighter than ethane. Prior to cooling in a main heat exchanger, the gaseous stream is split into two fractions. The first fraction is cooled in the main heat exchanger and introduced to the distillation column. The second fraction is expanded to produce a two phase fluid, with the liquid fraction being introduced to the distillation column below the first fraction, and the gas fraction being cooled and then introduced to the distillation column at a point above the first fraction. | 04-07-2016 |
| 20160097589 | APPARATUS FOR ETHANE LIQUEFACTION WITH DEMETHANIZATION - The apparatus for liquefying a gaseous stream received from a pipeline that is comprised predominantly of ethane and a relatively small amount of other components by using a mixed refrigerant refrigeration cycle loop incorporating heavy hydrocarbons, as well as a distillation column to remove constituents lighter than ethane. Prior to cooling in a main heat exchanger, the gaseous stream is split into two fractions. The main heat exchanger is configured to cool the first fraction before heading to the distillation column for separation therein. An expansion device expands the second fraction to produce a two phase fluid, which is separated in a gas/liquid separator, with the liquid fraction being introduced to the distillation column below the first fraction, and the gas fraction being cooled and then introduced to the distillation column at a point above the first fraction. | 04-07-2016 |
| 20160102908 | Refrigerant Recovery in Natural Gas Liquefaction Processes - Described herein is a method of removing refrigerant from a natural gas liquefaction system in which vaporized mixed refrigerant is withdrawn from the closed-loop refrigeration circuit and introduced into a distillation column so as to be separated into an overhead vapor enriched in methane and a bottoms liquid enriched in heavier components. Overhead vapor is withdrawn from the distillation column to form a methane enriched stream that is removed from the liquefaction system, and bottoms liquid is reintroduced from the distillation column into the closed-loop refrigeration circuit. Also described are methods of altering the rate of production in a natural gas liquefaction system in which refrigerant is removed as described above, and a natural gas liquefaction systems in which such methods can be carried out. | 04-14-2016 |
| 20160109179 | Isolated Power Networks Within An All-Electric LNG Plant And Methods For Operating Same - Embodiments generally relate to a motor driven compressor (MDC) power network electrically isolated and independent from a balance of plant (BOP) power network within an electrical power system and methods for operating the same. In one embodiment, the MDC power network can include one or more MDC trains, and each of the MDC trains can include an MDC distribution bus, one or more MDC turbine generators, one or more electric motors, and one or more compressors. The BOP power network can include a BOP distribution bus, one or more BOP turbine generators, and one or more plant circuits comprising the balance of the plant. | 04-21-2016 |
| 20160138861 | System and Method for Liquefied Natural Gas Production - A system and method for producing liquefied natural gas from a natural gas source is provided. The method may include feeding natural gas provided by the natural gas source to a liquefaction module. The method may also include flowing the natural gas through a product stream of the liquefaction module. The method may further include flowing a process fluid through a liquefaction stream of the liquefaction module to cool at least a portion of the natural gas flowing through the product stream to produce the liquefied natural gas. | 05-19-2016 |
| 20160252298 | System and Method for the Production of Liquefied Natural Gas | 09-01-2016 |
| 20160377340 | LIQUEFACTION SYSTEM USING A TURBOEXPANDER - The subject matter disclosed herein relates to a liquefaction system. Specifically, the present disclosure relates to systems and methods for condensing a pressurized gaseous working fluid, such as natural gas, using at least one turboexpander in combination with other cooling devices and techniques. In one embodiment, a turboexpander may be used in combination with a heat exchanger using vapor compression refrigeration to condense natural gas. | 12-29-2016 |
