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RU2007147253A - Combined extraction of PGC and production of liquefied natural gas - Google Patents

Combined extraction of PGC and production of liquefied natural gas Download PDF

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Publication number
RU2007147253A
RU2007147253A RU2007147253/06A RU2007147253A RU2007147253A RU 2007147253 A RU2007147253 A RU 2007147253A RU 2007147253/06 A RU2007147253/06 A RU 2007147253/06A RU 2007147253 A RU2007147253 A RU 2007147253A RU 2007147253 A RU2007147253 A RU 2007147253A
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RU
Russia
Prior art keywords
stream
irrigation
location
ethane
enriched
Prior art date
Application number
RU2007147253/06A
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Russian (ru)
Other versions
RU2367860C1 (en
Inventor
Адам Адриан БРОСТОУ (US)
Адам Адриан БРОСТОУ
Марк Джулиан РОБЕРТС (US)
Марк Джулиан РОБЕРТС
Original Assignee
Эр Продактс Энд Кемикалз, Инк. (Us)
Эр Продактс Энд Кемикалз, Инк.
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Publication of RU2007147253A publication Critical patent/RU2007147253A/en
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Publication of RU2367860C1 publication Critical patent/RU2367860C1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
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    • 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
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    • 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
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    • 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
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    • 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
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    • F25J1/0215—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 dual level refrigeration cascade with at least one MCR cycle with one SCR cycle
    • F25J1/0216—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 dual level refrigeration cascade with at least one MCR cycle with one SCR cycle using a C3 pre-cooling cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0229—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock
    • F25J1/0231—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock for the working-up of the hydrocarbon feed, e.g. reinjection of heavier hydrocarbons into the liquefied gas
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    • F25J1/0237—Heat exchange integration integrating refrigeration provided for liquefaction and purification/treatment of the gas to be liquefied, e.g. heavy hydrocarbon removal from natural gas
    • F25J1/0239—Purification or treatment step being integrated between two refrigeration cycles of a refrigeration cascade, i.e. first cycle providing feed gas cooling and second cycle providing overhead gas cooling
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    • 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
    • F25J2270/12—External refrigeration with liquid vaporising 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
    • F25J2270/60—Closed external refrigeration cycle with single component refrigerant [SCR], e.g. C1-, C2- or C3-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
    • F25J2270/66—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
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/40—Vertical layout or arrangement of cold equipments within in the cold box, e.g. columns, condensers, heat exchangers etc.

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Abstract

1. Объединенный способ производства природного газоконденсата (ПГК) и сжиженного природного газа (СПГ) из подачи природного газа из метана с примесью этана и более тяжелого углеводорода(ов), включающий стадии: ! вводят подачу в колонну-скруббер в первом местоположении; ! отводят из колонны-скруббера первый поток пара верхнего погона, обедненный компонентами более тяжелыми чем метан, и поток отстоя, обогащенный компонентами более тяжелыми чем метан; ! охлаждают и частично конденсируют первый поток пара верхнего погона, чтобы образовать первый двухфазный поток; ! разделяют первый двухфазный поток, чтобы обеспечить второй поток пара верхнего погона и богатый метаном первый поток орошения; ! вводят обогащений метаном первый поток орошения во второе местоположение в колонну-скруббер выше первого местоположения; ! сжижают второй поток пара верхнего погона в основном теплообменнике, чтобы обеспечить продукт СПГ; ! разделяют поток отстоя, чтобы обеспечить обогащенный этаном поток и поток продукта ПГК, обогащенный компонентами более тяжелыми чем этан; и ! полностью конденсируют обогащенный этаном поток при температуре ниже температуры подачи в колонну-скруббер в основном теплообменнике и ! нагнетают сконденсированный поток в колонну-скруббер в качестве второго потока орашения в местоположении, выбранном из второго местоположения и третьего местоположения выше первого местоположения. ! 2. Способ по п.1, в котором хладагент для основного теплообменника представляет собой рециркулирующий смешанный холодильный агент. ! 3. Способ по п.1 или 2, в котором богатый метаном первый поток орошения составляет, по меньшей мере, при�1. The combined method for the production of natural gas condensate (PGA) and liquefied natural gas (LNG) from the supply of natural gas from methane mixed with ethane and heavier hydrocarbon (s), comprising the steps of:! feed is introduced into the scrubber column at a first location; ! diverting from the scrubber column a first overhead vapor stream depleted in components heavier than methane and a sludge stream enriched in components heavier than methane; ! cooling and partially condensing the first overhead steam stream to form a first two-phase stream; ! separating the first two-phase stream to provide a second overhead steam stream and a methane-rich first irrigation stream; ! methane enrichments are introduced, the first irrigation stream at a second location in a scrubber column above the first location; ! liquefying a second overhead vapor stream in the main heat exchanger to provide an LNG product; ! separating the sludge stream to provide an ethane-enriched stream and an PGC product stream enriched in components heavier than ethane; and! the ethane-enriched stream is completely condensed at a temperature below the supply temperature to the scrubber column in the main heat exchanger and! pumping the condensed stream into the scrub column as a second spray stream at a location selected from a second location and a third location above the first location. ! 2. The method according to claim 1, in which the refrigerant for the main heat exchanger is a recirculating mixed refrigerant. ! 3. The method according to claim 1 or 2, in which the methane-rich first irrigation stream is at least

Claims (41)

1. Объединенный способ производства природного газоконденсата (ПГК) и сжиженного природного газа (СПГ) из подачи природного газа из метана с примесью этана и более тяжелого углеводорода(ов), включающий стадии:1. The combined method for the production of natural gas condensate (PGA) and liquefied natural gas (LNG) from the supply of natural gas from methane mixed with ethane and heavier hydrocarbon (s), comprising the steps of: вводят подачу в колонну-скруббер в первом местоположении;introducing feed into the scrubber column at a first location; отводят из колонны-скруббера первый поток пара верхнего погона, обедненный компонентами более тяжелыми чем метан, и поток отстоя, обогащенный компонентами более тяжелыми чем метан;diverting from the scrubber column a first overhead vapor stream depleted in components heavier than methane and a sludge stream enriched in components heavier than methane; охлаждают и частично конденсируют первый поток пара верхнего погона, чтобы образовать первый двухфазный поток;cooling and partially condensing the first overhead steam stream to form a first two-phase stream; разделяют первый двухфазный поток, чтобы обеспечить второй поток пара верхнего погона и богатый метаном первый поток орошения;separating the first two-phase stream to provide a second overhead steam stream and a methane-rich first irrigation stream; вводят обогащений метаном первый поток орошения во второе местоположение в колонну-скруббер выше первого местоположения;methane enrichments are introduced in a first irrigation stream to a second location in a scrubber column above the first location; сжижают второй поток пара верхнего погона в основном теплообменнике, чтобы обеспечить продукт СПГ;liquefying a second overhead vapor stream in the main heat exchanger to provide an LNG product; разделяют поток отстоя, чтобы обеспечить обогащенный этаном поток и поток продукта ПГК, обогащенный компонентами более тяжелыми чем этан; иseparating the sludge stream to provide an ethane-enriched stream and an PGC product stream enriched in components heavier than ethane; and полностью конденсируют обогащенный этаном поток при температуре ниже температуры подачи в колонну-скруббер в основном теплообменнике иthe ethane-enriched stream is completely condensed at a temperature below the supply temperature to the scrub column in the main heat exchanger and нагнетают сконденсированный поток в колонну-скруббер в качестве второго потока орашения в местоположении, выбранном из второго местоположения и третьего местоположения выше первого местоположения.pumping the condensed stream into the scrub column as a second spray stream at a location selected from a second location and a third location above the first location. 2. Способ по п.1, в котором хладагент для основного теплообменника представляет собой рециркулирующий смешанный холодильный агент.2. The method according to claim 1, in which the refrigerant for the main heat exchanger is a recirculating mixed refrigerant. 3. Способ по п.1 или 2, в котором богатый метаном первый поток орошения составляет, по меньшей мере, приблизительно 80% от всего орошения (то есть жидкости, подаваемой в колонну-скруббер выше первого местоположения).3. The method according to claim 1 or 2, in which the methane-rich first irrigation stream comprises at least about 80% of the total irrigation (that is, the liquid supplied to the scrub column above the first location). 4. Способ по п.1, в котором второй поток орошения составляет менее чем приблизительно 20% от всего орошения (то есть жидкости, подаваемой в колонну-скруббер выше первого местоположения).4. The method according to claim 1, in which the second stream of irrigation is less than approximately 20% of the total irrigation (that is, the liquid supplied to the scrub column above the first location). 5. Способ по п.1 или 2, в котором охлаждение и частичную конденсацию первого потока пара верхнего погона производят в теплом пучке основного теплообменника.5. The method according to claim 1 or 2, in which cooling and partial condensation of the first stream of steam overhead produced in a warm beam of the main heat exchanger. 6. Способ по п.1 или 2, в котором обогащенный этаном второй поток орошения подают в колонну-скруббер отдельно от богатого метаном первого потока орошения.6. The method according to claim 1 or 2, in which the ethane-enriched second irrigation stream is fed to the scrub column separately from the methane-rich first irrigation stream. 7. Способ по п.1 или 2, в котором обогащенный этаном второй поток орошения смешивают с богатым метаном первым потоком орошения перед введением в колонну-скруббер.7. The method according to claim 1 or 2, wherein the ethane-rich second irrigation stream is mixed with the methane-rich first irrigation stream before being introduced into the scrubber column. 8. Способ по п.7, в котором обогащенный этаном второй поток орошения объединяют с первым двухфазным потоком в местоположении, выбранном из местоположения выше по потоку, чем сборник орошающей фракции, и в нем.8. The method according to claim 7, in which the ethane-enriched second irrigation stream is combined with the first two-phase stream at a location selected from an upstream location than the collector of the irrigation fraction, and in it. 9. Способ по п.7, в котором первый двухфазный поток подают в нижнюю часть колонны-абсорбера, в которую обогащенный этаном второй поток орошения подают, как орошение.9. The method according to claim 7, in which the first two-phase stream is fed to the lower part of the absorber column, into which the ethane-enriched second irrigation stream is supplied as irrigation. 10. Способ по п.8 или 9, в котором обогащенный этаном поток полностью конденсируют перед смешиванием с богатым метаном первым потоком орошения.10. The method of claim 8 or 9, wherein the ethane-enriched stream is completely condensed prior to mixing with the methane-rich first irrigation stream. 11. Способ по пп.1, 2, 8 или 9, в котором обогащенный этаном поток представляет собой пар верхнего погона деэтанизатора.11. The method according to claims 1, 2, 8, or 9, wherein the ethane-enriched stream is steam overhead of a deethanizer. 12. Способ по пп.1, 2, 8 или 9, в котором абсорбирующую жидкость, извлеченную из одного или более потоков, обогащенных компонентами более тяжелыми чем этан, вводят в колонну-скруббер в местоположении, выбранном из второго местоположения, третьего местоположения и четвертого местоположения выше первого местоположения.12. The method according to claims 1, 2, 8 or 9, in which the absorbing liquid extracted from one or more streams enriched with components heavier than ethane is introduced into the scrub column at a location selected from the second location, third location and fourth locations above the first location. 13. Способ по п.12, в котором абсорбирующая жидкость содержит пентан и изопентан.13. The method according to item 12, in which the absorbing liquid contains pentane and isopentane. 14. Способ по п.13, в котором абсорбирующая жидкость содержит углеводород(ы) C4.14. The method according to item 13, in which the absorbing liquid contains a hydrocarbon (s) C 4 . 15. Способ по любому из пп.13 или 14, в котором абсорбирующая жидкость содержит углеводород(ы) С5+.15. The method according to any one of paragraphs.13 or 14, in which the absorbing liquid contains C 5+ hydrocarbon (s). 16. Способ по любому из пп.13 или 14, в котором абсорбирующую жидкость подают в колонну-скруббер отдельно либо от обогащенного этаном второго потока орошения, либо от богатого метаном первого потока орошения.16. The method according to any one of paragraphs.13 or 14, in which the absorbent liquid is supplied to the scrub column separately from either the ethane-rich second irrigation stream or the methane-rich first irrigation stream. 17. Способ по любому из пп.13-14, в котором абсорбирующую жидкость объединяют с, по меньшей мере, одним из богатого метаном первого потока орошения и обогащенного этаном второго потока орошения перед введением в колонну-скруббер.17. The method according to any one of claims 13-14, wherein the absorbent liquid is combined with at least one of the first methane-rich irrigation stream and the ethane-rich second irrigation stream before being introduced into the scrubber column. 18. Способ по п.17, в котором абсорбирующую жидкость объединяют с, по меньшей мере, одним из первого двухфазного потока и обогащенного этаном второго потока орошения в местоположении, выбранном из местоположения выше по потоку, чем сборник орошающей фракции, и в нем.18. The method according to 17, in which the absorbing liquid is combined with at least one of the first two-phase stream and the ethane-enriched second stream of irrigation at a location selected from a location upstream than the collector of the irrigating fraction, and in it. 19. Способ по п.17, в котором первый двухфазный поток подают в нижнюю часть колонны-абсорбера, в которую, по меньшей мере, одно из абсорбирующей жидкости и обогащенного этаном второго потока орошения подают как орошение.19. The method according to 17, in which the first two-phase stream is fed into the lower part of the absorber column, into which at least one of the absorbing liquid and the ethane-enriched second irrigation stream are supplied as irrigation. 20. Способ по п.19, в котором абсорбирующую жидкость объединяют с первым потоком пара верхнего погона перед частичной конденсацией указанного потока, чтобы образовать первый двухфазный поток.20. The method according to claim 19, in which the absorbing liquid is combined with the first overhead steam stream before partial condensation of the specified stream to form a first two-phase stream. 21. Способ по любому из пп.13 или 14, в котором абсорбирующую жидкость объединяют с газообразным обогащенным этаном потоком перед конденсацией указанного потока, чтобы обеспечить второй поток орошения.21. The method according to any one of paragraphs.13 or 14, in which the absorbing liquid is combined with a gaseous ethane-enriched stream before condensation of the specified stream to provide a second irrigation stream. 22. Способ по п.21, в котором объединенные абсорбирующую жидкость и газообразный обогащенный этаном поток подвергают разделению фаз и жидкую фракцию подают в колонну-скруббер выше первого местоположения.22. The method according to item 21, in which the combined absorbing liquid and a gaseous stream enriched in ethane are subjected to phase separation and the liquid fraction is fed into the scrub column above the first location. 23. Способ по п.22, в котором паровую фракцию конденсируют и подают в колонну-скруббер выше первого местоположения.23. The method according to item 22, in which the vapor fraction is condensed and fed into the scrub column above the first location. 24. Способ по п.22 или 23, в котором жидкую фракцию объединяют с первым потоком верхнего погона перед частичной конденсацией этого потока верхнего погона, чтобы обеспечить первый двухфазный поток.24. The method according to item 22 or 23, in which the liquid fraction is combined with the first overhead stream before partial condensation of this overhead stream to provide a first two-phase stream. 25. Способ по п.22 или 23, в котором сконденсированную паровую фракцию объединяют с первым потоком верхнего погона перед частичной конденсацией этого потока верхнего погона, чтобы обеспечить первый двухфазный поток.25. The method according to item 22 or 23, in which the condensed vapor fraction is combined with the first overhead stream before partial condensation of this overhead stream to provide a first two-phase stream. 26. Способ по любому одному из пп.13, 14, 18, 19, 20, 22 или 23, в котором абсорбирующая жидкость составляет менее чем приблизительно 10% всего орошения (то есть жидкости, подаваемой в колонну-скруббер выше первого местоположения).26. The method according to any one of paragraphs.13, 14, 18, 19, 20, 22 or 23, in which the absorbing liquid comprises less than about 10% of the total irrigation (that is, the liquid supplied to the scrub column above the first location). 27. Способ по любому одному из пп.13, 14, 18, 19, 20, 22 или 23, в котором второй поток орошения содержит менее чем приблизительно 0,05% пропана.27. The method according to any one of paragraphs.13, 14, 18, 19, 20, 22 or 23, in which the second stream of irrigation contains less than about 0.05% propane. 28. Способ по любому одному из пп.13, 14, 18, 19, 20, 22 или 23, в котором метан удаляют из обогащенного этаном потока, посредством чего второй поток орошения состоит, по существу, из этана.28. The method according to any one of paragraphs.13, 14, 18, 19, 20, 22 or 23, in which methane is removed from the ethane-enriched stream, whereby the second irrigation stream consists essentially of ethane. 29. Устройство для производства природного газоконденсата (ПГК) и сжиженного природного газа (СПГ) из подачи природного газа из метана с примесью этана и более тяжелого углеводорода(ов) посредством способа по п.1, причем указанное устройство содержит:29. A device for the production of natural gas condensate (PGC) and liquefied natural gas (LNG) from the supply of natural gas from methane mixed with ethane and heavier hydrocarbon (s) by the method according to claim 1, wherein said device contains: колонну-скруббер (114);scrubber column (114); трубопровод (110) для введения подачи в колонну-скруббер в первом местоположении;a pipe (110) for introducing feed into the scrub column at a first location; трубопровод (116) для отвода из колонны-скруббера первого потока пара верхнего погона, обедненного компонентами более тяжелыми чем метан, и потока (126) отстоя, обогащенного компонентами более тяжелыми чем метан;a pipeline (116) for draining from the scrub column a first overhead steam stream depleted in components heavier than methane and a sludge stream (126) enriched in components heavier than methane; теплообменник (122) для охлаждения и частичной конденсации первого потока пара верхнего погона, чтобы образовать первый двухфазный поток;a heat exchanger (122) for cooling and partially condensing the first overhead steam stream to form a first two-phase stream; средства (118, 218) для сепарации для разделения первого двухфазного потока, чтобы обеспечить второй поток пара верхнего погона и богатый метаном первый поток орошения;separation means (118, 218) for separating the first two-phase stream to provide a second overhead vapor stream and a methane-rich first irrigation stream; трубопровод (119) для введения богатого метаном первого потока орошения во втором местоположении в колонну-скруббер выше первого местоположения;a pipeline (119) for introducing a methane-rich first irrigation stream at a second location into the scrub column above the first location; основной теплообменник (122) для сжижения второго потока пара верхнего погона, чтобы обеспечить продукт (124) СПГ, и полной конденсации при температуре ниже температуры подачи в колонну-скруббер обогащенного этаном потока;a main heat exchanger (122) for liquefying a second overhead vapor stream to provide LNG product (124) and complete condensation at a temperature below the supply temperature to the ethane-rich stream to the scrub column; средство (128) для сепарации для разделения потока отстоя, чтобы обеспечить указанный обогащенный этаном поток и поток продукта ПГК, обогащенный компонентами более тяжелыми чем этан;separation means (128) for separating the sludge stream to provide said ethane-enriched stream and a PGC product stream enriched in components heavier than ethane; трубопровод (130) для подачи обогащенного этаном потока в основной теплообменник;a pipeline (130) for supplying an ethane-enriched stream to a main heat exchanger; трубопроводы (136 и 119) для введения в колонну-скруббер в качестве второго потока орошения в местоположении, выбранном из второго местоположения и третьего местоположения выше первого местоположения, указанного сконденсированного обогащенного этаном потока; иpipelines (136 and 119) for introducing into the scrub column as a second irrigation stream at a location selected from a second location and a third location above the first location specified condensed ethane-enriched stream; and насос (134) для нагнетания сконденсированного обогащенного этаном потока перед введением в колонну-скруббер (114).a pump (134) for injecting a condensed stream enriched in ethane before entering the scrub column (114). 30. Устройство по п.29, в котором средство теплообмена для охлаждения и частичной конденсации первого потока пара верхнего погона представляет собой теплый пучок основного теплообменника.30. The device according to clause 29, in which the heat transfer means for cooling and partial condensation of the first stream of steam overhead is a warm beam of the main heat exchanger. 31. Устройство по п.29 или 30, содержащее сборник (118) орошающей фракции, из которого смесь обогащенного этаном второго потока орошения и богатого метаном первого потока орошения подается в колонну-скруббер (114).31. The device according to clause 29 or 30, containing a collection (118) of the irrigation fraction, from which a mixture of the ethane-enriched second irrigation stream and the methane-rich first irrigation stream is supplied to the scrub column (114). 32. Устройство по п.29 или 30, содержащее колонну-абсорбер (218), в которую подается первый двухфазный поток как подача в нижнюю часть и обогащенный этаном второй поток орошения как орошение, и из которой жидкий отстой подается в колонну-скруббер (114).32. The device according to clause 29 or 30, containing the absorber column (218), into which the first two-phase stream is fed as a feed to the lower part and the second irrigation stream enriched in ethane as irrigation, and from which the liquid sludge is fed into the scrub column (114 ) 33. Устройство по любому из пп.29 или 30, содержащее трубопроводы (140, 136 и 119) для введения в колонну-скруббер (114) в местоположении, выбранном из второго местоположения, третьего местоположения и четвертого местоположения, выше первого местоположения, абсорбирующей жидкости, обогащенной компонентом(ами) более тяжелым чем этан, и снабженное средством (128) для сепарации для отделения потока отстоя колонны-скруббера.33. The device according to any one of paragraphs.29 or 30, containing pipelines (140, 136 and 119) for introduction into the scrub column (114) at a location selected from a second location, a third location and a fourth location, above the first location, absorbent liquid enriched with component (s) heavier than ethane, and provided with separation means (128) for separating a sludge column sludge stream. 34. Устройство по п.33, содержащее сборник (118) орошающей фракции, из которого смесь абсорбирующей жидкости и, по меньшей мере, одного из богатого метаном первого потока орошения и обогащенного этаном второго потока орошения подается в колонну-скруббер (114).34. The device according to p. 33, containing a collection (118) of the irrigation fraction, from which a mixture of an absorbing liquid and at least one of the first methane-rich irrigation stream and the ethane-rich second irrigation stream is fed to the scrub column (114). 35. Устройство по п.33, содержащее колонну-абсорбер (218), в которую подается первый двухфазный поток как подача в нижнюю часть и, по меньшей мере, одно из абсорбирующей жидкости и обогащенного этаном второго потока орошения как орошение, и из которой жидкий отстой подается в колонну-скруббер (114).35. The device according to p. 33, containing the absorber column (218), into which the first two-phase stream is fed as a feed to the lower part and at least one of the absorbing liquid and the ethane-enriched second irrigation stream as irrigation, and from which liquid sludge is fed to the scrubber column (114). 36. Устройство по любому из пп.34 или 35, содержащее средство (438) для объединения абсорбирующей жидкости с первым потоком пара верхнего погона перед частичной конденсацией указанного потока, чтобы образовать первый двухфазный поток.36. A device according to any one of claims 34 or 35, comprising means (438) for combining the absorbing liquid with a first overhead vapor stream before partially condensing said stream to form a first two-phase stream. 37. Устройство по любому из пп.34 или 35, содержащее средства (140 и 330) для объединения абсорбирующей жидкости с газообразным обогащенным этаном потоком перед конденсацией указанного потока, чтобы обеспечить второй поток орошения.37. A device according to any one of claims 34 or 35, comprising means (140 and 330) for combining the absorbing liquid with a gaseous ethane-enriched stream before condensing said stream to provide a second irrigation stream. 38. Устройство по п.37, содержащее сепаратор (430) для разделения фаз объединенного потока абсорбирующей жидкости и газообразного обогащенного этаном потока и трубопроводы (438 и 416) для подачи жидкой фракции в колонну-скруббер (114) выше первого местоположения.38. The device according to clause 37, containing a separator (430) for phase separation of the combined stream of the absorbing liquid and the gaseous stream enriched in ethane and pipelines (438 and 416) for supplying the liquid fraction to the scrub column (114) above the first location. 39. Устройство по п.38, содержащее теплообменники (122; 532) для конденсации паровой фракции и трубопроводы (436; 536, 538 и 516) для подачи сконденсированного пара в колонну-скруббер (114) выше первого местоположения.39. The device according to § 38, containing heat exchangers (122; 532) for condensing the vapor fraction and pipelines (436; 536, 538 and 516) for supplying condensed steam to the scrub column (114) above the first location. 40. Устройство по п.38 или 39, содержащее средство (438) для объединения жидкой фракции с первым потоком верхнего погона перед частичной конденсацией этого потока верхнего погона, чтобы обеспечить первый двухфазный поток.40. The device according to § 38 or 39, containing means (438) for combining the liquid fraction with the first overhead stream before partial condensation of this overhead stream to provide a first two-phase stream. 41. Устройство по п.39, содержащее средства (532 и 538) для объединения фракции сконденсированного пара с первым потоком верхнего погона перед частичной конденсацией этого потока верхнего погона, чтобы обеспечить первый двухфазный поток. 41. The device according to § 39, containing means (532 and 538) for combining the condensed vapor fraction with the first overhead stream before partial condensation of this overhead stream to provide a first two-phase stream.
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CA2608302A1 (en) 2006-11-23
TWI314578B (en) 2009-09-11
RU2367860C1 (en) 2009-09-20
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KR20080015819A (en) 2008-02-20
US20100024477A1 (en) 2010-02-04

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