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RU2011137411A - METHOD FOR LIQUIDING FLOW WITH HIGH CONTENT OF HYDROCARBONS - Google Patents

METHOD FOR LIQUIDING FLOW WITH HIGH CONTENT OF HYDROCARBONS Download PDF

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Publication number
RU2011137411A
RU2011137411A RU2011137411/06A RU2011137411A RU2011137411A RU 2011137411 A RU2011137411 A RU 2011137411A RU 2011137411/06 A RU2011137411/06 A RU 2011137411/06A RU 2011137411 A RU2011137411 A RU 2011137411A RU 2011137411 A RU2011137411 A RU 2011137411A
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Russia
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fraction
mixture
refrigerants
liquefied
high content
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RU2011137411/06A
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Russian (ru)
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RU2537480C2 (en
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Хайнц БАУЭР
Райнер ЗАППЕР
Даниэль ГАРТЕ
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Линде Акциенгезелльшафт
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/006—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant containing more than one component
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
    • F25J1/0055—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream originating from an incorporated cascade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0211—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle
    • F25J1/0212—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle as a single flow MCR cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0244—Operation; Control and regulation; Instrumentation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0291—Refrigerant compression by combined gas compression and liquid pumping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
    • F25J3/0209—Natural gas or substitute natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0233—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 1 carbon atom or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0238—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 2 carbon atoms or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/02—Processes or apparatus using separation by rectification in a single pressure main column system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/70—Refluxing the column with a condensed part of the feed stream, i.e. fractionator top is stripped or self-rectified
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/06—Splitting of the feed stream, e.g. for treating or cooling in different ways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/04—Recovery of liquid products
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/18—External refrigeration with incorporated cascade loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/66—Closed external refrigeration cycle with multi component refrigerant [MCR], e.g. mixture of hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • F25J2270/902—Details about the refrigeration cycle used, e.g. composition of refrigerant, arrangement of compressors or cascade, make up sources, use of reflux exchangers etc.
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2280/00—Control of the process or apparatus
    • F25J2280/02—Control in general, load changes, different modes ("runs"), measurements

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

1. Способ сжижения фракции с высоким содержанием углеводородов при одновременном удалении фракции с высоким содержанием C, при этом охлаждение и сжижение фракции с высоким содержанием углеводородов происходит при непрямом теплообмене посредством смеси хладагентов циркуляционного контура смеси хладагентов, в котором смесь хладагентов подвергают по меньшей мере двухступенчатому сжатию, и удаление фракции с высоким содержанием Cпроисходит на регулируемом уровне температуры, при этом смесь хладагентов разделяют на газообразную и жидкую фракцию, обе фракции переохлаждаются, расширяются, по существу, до давления всасывания первой ступени компрессора и по меньшей мере частично выпариваются, отличающийся тем, что по меньшей мере временно по меньшей мере один частичный поток (19, 24) сжиженной, прежде газообразной фракции смеси (15) хладагентов расширяется (j, h) и подмешивается к расширенной жидкой фракции смеси (21) хладагентов.2. Способ по п.1, отличающийся тем, что частичный поток (19, 24) сжиженной, прежде газообразной фракции смеси (15) хладагентов на холодном конце теплообменника (E3) между подлежащей сжижению фракцией (1, 2) с высоким содержанием углеводородов и смесью (15, 17, 18, 20, 20', 22) хладагентов и/или при надлежащей промежуточной температуре отводится, расширяется (j, h) и подмешивается к расширенной жидкой фракции смеси (21) хладагентов, при этом надлежащая промежуточная температура устанавливается тогда, когда смесь (15) хладагентов переохлаждена по меньшей мере на 5°C, предпочтительно на 10°C относительно состояния кипения.3. Способ по п.1 или 2, отличающийся тем, что теплообмен между подлежащей сжижению фракцией (1, 2) с высок�1. A method of liquefying a high hydrocarbon fraction while removing a high C fraction, while cooling and liquefaction of the high hydrocarbon fraction occurs by indirect heat exchange by means of a refrigerant mixture in the circulation circuit of the refrigerant mixture, in which the mixture of refrigerants is subjected to at least two-stage compression , and the removal of the fraction with a high content of C occurs at an adjustable temperature level, while the mixture of refrigerants is divided into gaseous and liquid fraction, both fractions are cooled, expanded essentially to the suction pressure of the first stage of the compressor and at least partially evaporated, characterized in that at least temporarily at least one partial stream (19, 24) of the liquefied, previously gaseous fraction of the mixture ( 15) the refrigerant expands (j, h) and is mixed with the expanded liquid fraction of the mixture (21) of refrigerants. 2. The method according to claim 1, characterized in that the partial stream (19, 24) of the liquefied, previously gaseous fraction of the mixture (15) of refrigerants at the cold end of the heat exchanger (E3) between the high-hydrocarbon fraction (1, 2) and mixture ( 15, 17, 18, 20, 20 ', 22) refrigerants and / or at an appropriate intermediate temperature are removed, expanded (j, h) and mixed with the expanded liquid fraction of the mixture (21) of refrigerants, while the appropriate intermediate temperature is established when refrigerant mixture (15) is at least 5 ° C supercooled, p edpochtitelno at 10 ° C on the state kipeniya.3. The method according to claim 1 or 2, characterized in that the heat exchange between the fraction to be liquefied (1, 2) is high

Claims (6)

1. Способ сжижения фракции с высоким содержанием углеводородов при одновременном удалении фракции с высоким содержанием C2+, при этом охлаждение и сжижение фракции с высоким содержанием углеводородов происходит при непрямом теплообмене посредством смеси хладагентов циркуляционного контура смеси хладагентов, в котором смесь хладагентов подвергают по меньшей мере двухступенчатому сжатию, и удаление фракции с высоким содержанием C2+ происходит на регулируемом уровне температуры, при этом смесь хладагентов разделяют на газообразную и жидкую фракцию, обе фракции переохлаждаются, расширяются, по существу, до давления всасывания первой ступени компрессора и по меньшей мере частично выпариваются, отличающийся тем, что по меньшей мере временно по меньшей мере один частичный поток (19, 24) сжиженной, прежде газообразной фракции смеси (15) хладагентов расширяется (j, h) и подмешивается к расширенной жидкой фракции смеси (21) хладагентов.1. A method of liquefying a high hydrocarbon fraction while removing a high C 2+ fraction, while cooling and liquefying the high hydrocarbon fraction occurs through indirect heat exchange by means of a refrigerant mixture in a circulation circuit of a refrigerant mixture, in which at least a refrigerant mixture is subjected two-stage compression, and the removal of the fraction with a high content of C 2+ occurs at an adjustable temperature level, while the mixture of refrigerants is divided into gaseous and a dry fraction, both fractions are supercooled, expand essentially to the suction pressure of the first stage of the compressor and at least partially evaporate, characterized in that at least temporarily at least one partial stream (19, 24) of the liquefied, previously gaseous fraction of the mixture (15) the refrigerant expands (j, h) and is mixed with the expanded liquid fraction of the mixture (21) of refrigerants. 2. Способ по п.1, отличающийся тем, что частичный поток (19, 24) сжиженной, прежде газообразной фракции смеси (15) хладагентов на холодном конце теплообменника (E3) между подлежащей сжижению фракцией (1, 2) с высоким содержанием углеводородов и смесью (15, 17, 18, 20, 20', 22) хладагентов и/или при надлежащей промежуточной температуре отводится, расширяется (j, h) и подмешивается к расширенной жидкой фракции смеси (21) хладагентов, при этом надлежащая промежуточная температура устанавливается тогда, когда смесь (15) хладагентов переохлаждена по меньшей мере на 5°C, предпочтительно на 10°C относительно состояния кипения.2. The method according to claim 1, characterized in that the partial stream (19, 24) of the liquefied, previously gaseous fraction of the mixture (15) of refrigerants at the cold end of the heat exchanger (E3) between the high-hydrocarbon fraction (1, 2) to be liquefied and with a mixture (15, 17, 18, 20, 20 ', 22) of refrigerants and / or, at an appropriate intermediate temperature, it is discharged, expanded (j, h) and mixed with the expanded liquid fraction of the mixture (21) of refrigerants, while the appropriate intermediate temperature is then established when the mixture (15) of refrigerants is at least 5 ° C supercooled, preferably 10 ° C. relative to the boiling state. 3. Способ по п.1 или 2, отличающийся тем, что теплообмен между подлежащей сжижению фракцией (1, 2) с высоким содержанием углеводородов и смесью (15, 17, 18, 20, 20', 22) хладагентов осуществляется в многопоточном теплообменнике (E3), который предпочтительно выполнен в виде пластинчатого теплообменника или витого теплообменника.3. The method according to claim 1 or 2, characterized in that the heat exchange between the liquefied fraction (1, 2) with a high content of hydrocarbons and the mixture (15, 17, 18, 20, 20 ', 22) of refrigerants is carried out in a multi-flow heat exchanger ( E3), which is preferably in the form of a plate heat exchanger or a twisted heat exchanger. 4. Способ по п.1 или 2, при котором удаление фракции с высоким содержанием C2+ осуществляется по меньшей мере в одной разделительной колонне, отличающийся тем, что по меньшей мере временно частичный поток (5) подлежащей сжижению фракции с высоким содержанием углеводородов подается в головную область разделительной колонны (T).4. The method according to claim 1 or 2, in which the removal of the fraction with a high content of C 2+ is carried out in at least one separation column, characterized in that at least temporarily a partial stream (5) of the fraction to be liquefied with a high content of hydrocarbons is supplied into the head region of the separation column (T). 5. Способ по п.1 или 2, при котором удаление фракции с высоким содержанием C2+ осуществляется по меньшей мере в одной разделительной колонне, отличающийся тем, что по меньшей мере временно частичный поток (5) подлежащей сжижению фракции с высоким содержанием углеводородов подается в нижнюю область разделительной колонны (T).5. The method according to claim 1 or 2, in which the removal of the fraction with a high content of C 2+ is carried out in at least one separation column, characterized in that at least temporarily a partial stream (5) of the fraction to be liquefied with a high content of hydrocarbons is supplied into the lower region of the separation column (T). 6. Способ по п.1 или 2, при котором удаление фракции с высоким содержанием C2+ осуществляется по меньшей мере в одной разделительной колонне, отличающийся тем, что посредством кипятильника (E4), которым снабжена разделительная колонна (T), устанавливается температура нижней части разделительной колонны. 6. The method according to claim 1 or 2, in which the removal of the fraction with a high content of C 2+ is carried out in at least one separation column, characterized in that by means of the boiler (E4), which is equipped with the separation column (T), the lower temperature is set parts of the separation column.
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