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RU2009101148A - METHOD AND DEVICE FOR HYDROCARBON FLOW TREATMENT AND DEVICE FOR ITS IMPLEMENTATION - Google Patents

METHOD AND DEVICE FOR HYDROCARBON FLOW TREATMENT AND DEVICE FOR ITS IMPLEMENTATION Download PDF

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RU2009101148A
RU2009101148A RU2009101148/06A RU2009101148A RU2009101148A RU 2009101148 A RU2009101148 A RU 2009101148A RU 2009101148/06 A RU2009101148/06 A RU 2009101148/06A RU 2009101148 A RU2009101148 A RU 2009101148A RU 2009101148 A RU2009101148 A RU 2009101148A
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stream
gas
liquid
liquid separation
feed
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RU2009101148/06A
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RU2446370C2 (en
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Эдуард Кунрад БРАС (NL)
Эдуард Кунрад Брас
МОСТАФА Хуссейн Мохаммед ИСМАИЛ (EG)
МОСТАФА Хуссейн Мохаммед ИСМАИЛ
Парамасивам Сентил КУМАР (NL)
Парамасивам Сентил Кумар
Original Assignee
Шелл Интернэшнл Рисерч Маатсхаппий Б.В. (NL)
Шелл Интернэшнл Рисерч Маатсхаппий Б.В.
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • C10L3/10—Working-up natural gas or synthetic natural gas
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G5/00—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas
    • C10G5/06—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas by cooling or compressing
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G7/00—Distillation of hydrocarbon oils
    • C10G7/02—Stabilising gasoline by removing gases by fractioning
    • 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
    • F25J3/0242—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 3 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
    • 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
    • F25J3/0247—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 4 carbon atoms or more
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/10—Feedstock materials
    • C10G2300/1025—Natural gas
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/40—Characteristics of the process deviating from typical ways of processing
    • C10G2300/4012—Pressure
    • 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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/74—Refluxing the column with at least a part of the partially condensed overhead 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
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • 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
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/60—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being (a 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
    • 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
    • F25J2260/00—Coupling of processes or apparatus to other units; Integrated schemes
    • F25J2260/20—Integration in an installation for liquefying or solidifying a fluid 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
    • F25J2270/04—Internal refrigeration with work-producing gas expansion loop

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

Abstract

1. Способ обработки потока углеводородов, например потока природного газа, включающий, по меньшей мере, стадии: ! (a) подачи частично сконденсированного сырьевого потока (10), имеющего давление свыше 50 бар, в первый аппарат (2) для разделения газа/жидкости; ! (b) разделения сырьевого потока (10) в первом аппарате (2) для разделения газа/жидкости на первый поток (20) пара и первый поток (70) жидкости; ! (c) расширения первого потока (20) пара, полученного на стадии (b), с получением в результате, по меньшей мере, частично сконденсированного первого потока (30) пара; ! (d) подачи, по меньшей мере, частичного сконденсированного первого потока (30) пара, полученного на стадии (с), во второй аппарат (4) для разделения газа/жидкости; ! (e) разделения потока (30), полученного на стадии (d), во втором аппарате (4) для разделения газа/жидкости на второй поток (60) пара и второй поток (40) жидкости; ! (f) повышения давления второго потока (40) жидкости, полученного на стадии (е), до давления, равного, по меньшей мере, 50 бар, с получением в результате сжатого второго потока (50) жидкости; и ! (g) возврата сжатого второго потока (50) жидкости, полученного на стадии (f), в первый аппарат (2) для разделения газа/жидкости. ! 2. Способ по п.1, в котором на стадии (а) сырьевой поток (10) подают, по меньшей мере, двумя потоками (10а, 10b) в первый аппарат (2) для разделения газа/жидкости, при этом сырьевой поток (10) включает в себя сырьевой поток (10а), подводимый в аппарат на более высоком уровне, и сырьевой поток (10b), подводимый в аппарат на более низком уровне. ! 3. Способ по п.2, в котором сырьевой поток (10а), подводимый в аппарат на более высоком уровне, охлаждают перед его подачей в первый аппарат (2) для ра 1. A method of processing a hydrocarbon stream, for example a natural gas stream, comprising at least the steps:! (a) supplying a partially condensed feed stream (10) having a pressure in excess of 50 bar to a first gas / liquid separation apparatus (2); ! (b) dividing the feed stream (10) in the first gas / liquid separator (2) into a first vapor stream (20) and a first liquid stream (70); ! (c) expanding the first steam stream (20) obtained in step (b) resulting in an at least partially condensed first steam stream (30); ! (d) supplying at least a partially condensed first vapor stream (30) obtained in step (c) to a second gas / liquid separation apparatus (4); ! (e) separating the stream (30) obtained in step (d) in the second apparatus (4) for separating gas / liquid into a second stream (60) of vapor and a second stream (40) of liquid; ! (f) increasing the pressure of the second liquid stream (40) obtained in step (e) to a pressure of at least 50 bar, thereby obtaining a compressed second liquid stream (50); and ! (g) returning the compressed second liquid stream (50) from step (f) to the first gas / liquid separation apparatus (2). ! 2. A method according to claim 1, wherein in step (a), the feed stream (10) is fed by at least two streams (10a, 10b) to the first gas / liquid separation apparatus (2), wherein the feed stream ( 10) includes a feed stream (10a) fed into the apparatus at a higher level and a feed stream (10b) fed into the apparatus at a lower level. ! 3. The method according to claim 2, in which the feed stream (10a) supplied to the apparatus at a higher level is cooled before being fed to the first apparatus (2) for heating.

Claims (17)

1. Способ обработки потока углеводородов, например потока природного газа, включающий, по меньшей мере, стадии:1. A method of processing a hydrocarbon stream, for example a natural gas stream, comprising at least the steps of: (a) подачи частично сконденсированного сырьевого потока (10), имеющего давление свыше 50 бар, в первый аппарат (2) для разделения газа/жидкости;(a) supplying a partially condensed feed stream (10) having a pressure above 50 bar to a first gas / liquid separation apparatus (2); (b) разделения сырьевого потока (10) в первом аппарате (2) для разделения газа/жидкости на первый поток (20) пара и первый поток (70) жидкости;(b) separating the feed stream (10) in the first apparatus (2) for separating gas / liquid into a first vapor stream (20) and a first liquid stream (70); (c) расширения первого потока (20) пара, полученного на стадии (b), с получением в результате, по меньшей мере, частично сконденсированного первого потока (30) пара;(c) expanding the first vapor stream (20) obtained in step (b), resulting in at least partially condensed first vapor stream (30); (d) подачи, по меньшей мере, частичного сконденсированного первого потока (30) пара, полученного на стадии (с), во второй аппарат (4) для разделения газа/жидкости;(d) supplying at least a partially condensed first vapor stream (30) obtained in step (c) to a second gas / liquid separation apparatus (4); (e) разделения потока (30), полученного на стадии (d), во втором аппарате (4) для разделения газа/жидкости на второй поток (60) пара и второй поток (40) жидкости;(e) separating the stream (30) obtained in step (d) in a second apparatus (4) for separating gas / liquid into a second vapor stream (60) and a second liquid stream (40); (f) повышения давления второго потока (40) жидкости, полученного на стадии (е), до давления, равного, по меньшей мере, 50 бар, с получением в результате сжатого второго потока (50) жидкости; и(f) increasing the pressure of the second fluid stream (40) obtained in step (e) to a pressure of at least 50 bar, resulting in a compressed second fluid stream (50); and (g) возврата сжатого второго потока (50) жидкости, полученного на стадии (f), в первый аппарат (2) для разделения газа/жидкости.(g) returning the compressed second fluid stream (50) obtained in step (f) to the first gas / liquid separation apparatus (2). 2. Способ по п.1, в котором на стадии (а) сырьевой поток (10) подают, по меньшей мере, двумя потоками (10а, 10b) в первый аппарат (2) для разделения газа/жидкости, при этом сырьевой поток (10) включает в себя сырьевой поток (10а), подводимый в аппарат на более высоком уровне, и сырьевой поток (10b), подводимый в аппарат на более низком уровне.2. The method according to claim 1, wherein in step (a) the feed stream (10) is supplied with at least two streams (10a, 10b) to the first gas / liquid separation apparatus (2), wherein the feed stream ( 10) includes a feed stream (10a) supplied to the apparatus at a higher level, and a feed stream (10b) supplied to the apparatus at a lower level. 3. Способ по п.2, в котором сырьевой поток (10а), подводимый в аппарат на более высоком уровне, охлаждают перед его подачей в первый аппарат (2) для разделения газа и жидкости.3. The method according to claim 2, in which the feed stream (10a), supplied to the apparatus at a higher level, is cooled before it is fed to the first apparatus (2) for separating gas and liquid. 4. Способ по п.3, в котором сырьевой поток (10а), подводимый в аппарат на более высоком уровне, охлаждают в противотоке со вторым потоком (60) газа, полученным на стадии (е).4. The method according to claim 3, in which the feed stream (10a), supplied to the apparatus at a higher level, is cooled in countercurrent flow with the second gas stream (60) obtained in stage (e). 5. Способ по одному или более из пп.1-3, в котором первый поток (70) жидкости, полученный на стадии (b), направляют в третий аппарат (7) для разделения газа/ жидкости с получением третьего потока (80) пара и третьего потока (90) жидкости.5. The method according to one or more of claims 1 to 3, in which the first liquid stream (70) obtained in stage (b) is directed to a third gas / liquid separation apparatus (7) to obtain a third vapor stream (80) and a third fluid stream (90). 6. Способ по п.5, в котором третий поток (80) пара объединяют со вторым потоком (60, 65) пара.6. The method according to claim 5, in which a third steam stream (80) is combined with a second steam stream (60, 65). 7. Способ по п.5, в котором третий поток (90) жидкости обмениваете, теплотой в противотоке с первым потоком (70) жидкости, перед его подачей в третий аппарат (7) для разделения газа и жидкости.7. The method according to claim 5, in which the third fluid stream (90) is exchanged, heat in countercurrent with the first fluid stream (70), before being fed into the third apparatus (7) for gas and liquid separation. 8. Способ по п.6, в котором третий поток (90) жидкости обменивается теплотой в противотоке с первым потоком (70) жидкости, перед его подачей в третий аппарат (7) для разделения газа и жидкости.8. The method according to claim 6, in which the third liquid stream (90) exchanges heat in countercurrent with the first liquid stream (70), before it is supplied to the third apparatus (7) for gas and liquid separation. 9. Способ по п.5, в котором третий поток (90) жидкости обменивается теплотой в противотоке с сырьевым потоком (10b), вводимым в аппарат на более низком уровне.9. The method according to claim 5, in which the third fluid stream (90) exchanges heat in countercurrent flow with the feed stream (10b) introduced into the apparatus at a lower level. 10. Способ по п.5, в котором третья колонна (7) представляет собой дебутанизатор, за счет использования которого получают трети поток (80) пара, обогащенный по сравнению с третьим потоком (90) жидкости, бутаном и низкокипящими углеводородами.10. The method according to claim 5, in which the third column (7) is a debutanizer, through the use of which a third vapor stream (80) is obtained, enriched in comparison with the third liquid stream (90), butane and low boiling hydrocarbons. 11. Способ но одному или более из пп.1-4, в котором второй поток (60, 65) пара, необязательно после объединения с третьим потоком (80) пара, сжижают с получением сжиженного потока углеводородов.11. A process but one or more of claims 1 to 4, wherein the second steam stream (60, 65), optionally after being combined with the third steam stream (80), is liquefied to produce a liquefied hydrocarbon stream. 12. Способ по п.5, в котором второй поток (60, 65) пара, необязательно после объединения с третьим потоком (80) пара, сжижают с получением сжиженного потока углеводородов.12. The method according to claim 5, in which the second steam stream (60, 65), optionally after combining with the third steam stream (80), is liquefied to produce a liquefied hydrocarbon stream. 13. Устройство (1) для обработки потока (10) углеводородов, например потока природного газа, содержащее, по меньшей мере:13. A device (1) for treating a hydrocarbon stream (10), for example a natural gas stream, comprising at least: первый аппарат (2) для разделения газа/жидкости, предназначенный для разделения частично сконденсированного сырьевого потока (10) на первый поток (20) пара и первый поток (70) жидкости;a first gas / liquid separation apparatus (2) for separating a partially condensed feed stream (10) into a first vapor stream (20) and a first liquid stream (70); детандер (3) для расширения первого потока (20) пара;an expander (3) for expanding the first steam stream (20); второй аппарат (4) для разделения газа/жидкости, предназначенный для разделения расширенного первого потока (30) пара на второй поток (60) пара и второй поток (40) жидкости;a second gas / liquid separation apparatus (4) for separating the expanded first vapor stream (30) into a second vapor stream (60) and a second liquid stream (40); устройство (5) для сжатия, предназначенное для повышения давления второго потока (40) жидкости до давления, равного, по меньшей мере, 50 бар, производимого перед его возвратом в первый аппарат (2) для разделения газа/жидкости.a compression device (5) designed to increase the pressure of the second liquid stream (40) to a pressure of at least 50 bar produced before returning it to the first gas / liquid separation apparatus (2). 14. Устройство (1) по п.13, в котором первый аппарат (2) для разделения газа/ жидкости содержит, по меньшей мере, два входа (11, 12) для сырьевое потока, включая один вход (11) для сырьевого потока (10а), вводимого на более высоком уровне, и один вход (12) для сырьевого потока (10b), вводимого на более низком уровне.14. The device (1) according to claim 13, wherein the first gas / liquid separation apparatus (2) comprises at least two inputs (11, 12) for the feed stream, including one input (11) for the feed stream ( 10a) introduced at a higher level and one input (12) for a feed stream (10b) introduced at a lower level. 15. Устройство (1) по п.14, содержащее, дополнительно, теплообменник (6) для охлаждения сырьевого потока (10а) более высокого уровня в противотоке со вторым потоком (60) пара.15. The device (1) according to 14, further comprising a heat exchanger (6) for cooling a higher level feed stream (10a) in countercurrent flow with a second steam stream (60). 16. Устройство (1) по одному или более из пп.13-15, содержащее, дополнительно, третий аппарат (7) для разделения газа/жидкости, служащий для разделения первого потока (70) жидкости на третий поток (80) пара и третий поток (90) жидкости.16. The device (1) according to one or more of claims 13-15, further comprising a third gas / liquid separation apparatus (7) for separating a first liquid stream (70) into a third vapor stream (80) and a third fluid flow (90). 17. Устройство (1) по п.16, в котором третий поток (80) пара может быть объединен со вторым потоком (60, 65) пара. 17. The device (1) according to clause 16, in which the third stream (80) of steam can be combined with the second stream (60, 65) of steam.
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