RU2015136852A - METHOD FOR EXTRACTING ETHANE FROM A GAS Fraction WITH A HIGH CONTENT OF HYDROCARBONS - Google Patents

METHOD FOR EXTRACTING ETHANE FROM A GAS Fraction WITH A HIGH CONTENT OF HYDROCARBONS Download PDF

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RU2015136852A
RU2015136852A RU2015136852A RU2015136852A RU2015136852A RU 2015136852 A RU2015136852 A RU 2015136852A RU 2015136852 A RU2015136852 A RU 2015136852A RU 2015136852 A RU2015136852 A RU 2015136852A RU 2015136852 A RU2015136852 A RU 2015136852A
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fraction
separation stage
pressure
gaseous
content
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RU2015136852A
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RU2015136852A3 (en
RU2689866C2 (en
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Хайнц БАУЭР
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Линде Акциенгезелльшафт
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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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • 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
    • 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
    • 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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/04—Processes or apparatus using separation by rectification in a dual 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
    • F25J2200/50—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column
    • 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
    • F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step
    • 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
    • F25J2215/62—Ethane or ethylene
    • 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
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed 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
    • F25J2270/02—Internal refrigeration with liquid vaporising loop

Claims (20)

1. Способ выделения газообразной продуктовой фракции (11') с высоким содержанием этана из газообразной сырьевой фракции (1) с высоким содержанием углеводородов предпочтительно из природного газа, причем1. A method of isolating a gaseous product fraction (11 ') with a high ethane content from a gaseous feed fraction (1) with a high content of hydrocarbons, preferably from natural gas, wherein a) сырьевую фракцию (1) частично конденсируют и разделяют (D1) на газообразную (2,3) и жидкую (4) фракцию,a) the feed fraction (1) is partially condensed and separated (D1) into a gaseous (2,3) and liquid (4) fraction, b) газообразную (2,3) и жидкую (4) фракции разделяют ректификацией на газовую фракцию (5) с высоким содержанием метана и жидкую фракцию (7) с высоким содержанием C2+ (1-я ступень разделения T1),b) gaseous (2,3) and liquid (4) fractions are separated by rectification into a gas fraction (5) with a high methane content and a liquid fraction (7) with a high content of C 2+ (1st separation stage T1), c) причем по меньшей мере 60-90% газообразной фракции (2) расширяют (X) до давления 1-й ступени разделения (T1), а остальную часть (3) газообразной фракции сжижают (E2) за счет богатой метаном фракции (5), отбираемой в голове 1-й ступени разделения (T1), и при этом с 1-й ступени разделения (T1) отбирают по меньшей мере один боковой поток (6), частично переводят в пар и снова подают на 1-ю ступень разделения (T1), иc) wherein at least 60-90% of the gaseous fraction (2) is expanded (X) to a pressure of the 1st separation stage (T1), and the remaining part (3) of the gaseous fraction is liquefied (E2) due to the methane-rich fraction (5) taken in the head of the 1st separation stage (T1), and at least one side stream (6) is taken from the 1st separation stage (T1), partially transferred to steam and again fed to the 1st separation stage ( T1), and d) жидкую фракцию (7) с высоким содержанием C2+ путем ректификации разделяют (T2) на богатую этаном газовую фракцию (9) и жидкую фракцию (8) с высоким содержанием C3+ (2-я ступень разделения T2),d) the liquid fraction (7) with a high C 2+ content is separated by distillation (T2) into an ethane-rich gas fraction (9) and the liquid fraction (8) with a high C 3+ content (2nd separation stage T2), отличающийся тем, чтоcharacterized in that e) богатую этаном газовую фракцию (9) частично конденсируют (E1) за счет газовой фракции (5') с высоким содержанием метана и по меньшей мере одного подогреваемого бокового потока (6) 1-й ступени разделения (T1), получаемую при этом жидкую фракцию подают на 2-ю ступень разделения (T2) в качестве флегмы (10), а получаемая при этом газовая фракция (11) представляет собой продуктовую фракцию с высоким содержанием этана, иe) the ethane-rich gas fraction (9) is partially condensed (E1) due to the gas fraction (5 ') with a high methane content and at least one heated side stream (6) of the 1st separation stage (T1), the resulting liquid the fraction is fed to the 2nd separation stage (T2) as reflux (10), and the resulting gas fraction (11) is a product fraction with a high ethane content, and f) сырьевую фракцию (1) частично конденсируют (E1) исключительно за счет продуктовой фракции (11) с высоким содержанием этана, газовой фракции (5') с высоким содержанием метана и по меньшей мере одного подогреваемого бокового потока (6) с 1-й ступени разделения (T1).f) the feed fraction (1) is partially condensed (E1) exclusively due to the product fraction (11) with a high ethane content, the gas fraction (5 ') with a high methane content and at least one heated side stream (6) from the 1st separation stages (T1). 2. Способ по п. 1, отличающийся тем, что технологические этапы e) и f) проводят в многоходовом теплообменнике (E1).2. The method according to p. 1, characterized in that the technological steps e) and f) are carried out in a multi-pass heat exchanger (E1). 3. Способ по п. 1 или 2, отличающийся тем, что частично конденсируемая сырьевая фракция (1) имеет давление от 40 до 100 бар.3. The method according to p. 1 or 2, characterized in that the partially condensed feed fraction (1) has a pressure of from 40 to 100 bar. 4. Способ по п. 1 или 2, отличающийся тем, что 1-я ступень разделения (T1) работает при давлении от 15 до 35 бар.4. The method according to p. 1 or 2, characterized in that the 1st separation stage (T1) operates at a pressure of from 15 to 35 bar. 5. Способ по п. 3 отличающийся тем, что 1-я ступень разделения (T1) работает при давлении от 15 до 35 бар.5. The method according to claim 3, characterized in that the 1st separation stage (T1) operates at a pressure of 15 to 35 bar. 6. Способ по одному из пп. 1, 2 или 5, отличающийся тем, что 2-я ступень разделения (T2) работает при давлении на 4-12 бар, предпочтительно на 6-10 бар меньше, чем давление на 1-й ступени разделения (T1).6. The method according to one of paragraphs. 1, 2 or 5, characterized in that the 2nd separation stage (T2) operates at a pressure of 4-12 bar, preferably 6-10 bar less than the pressure at the 1st separation stage (T1). 7. Способ по п. 3, отличающийся тем, что 2-я ступень разделения (T2) работает при давлении на 4-12 бар, предпочтительно на 6-10 бар меньше, чем давление на 1-й ступени разделения (T1).7. The method according to p. 3, characterized in that the 2nd separation stage (T2) operates at a pressure of 4-12 bar, preferably 6-10 bar less than the pressure at the 1st separation stage (T1). 8. Способ по п. 4, отличающийся тем, что 2-я ступень разделения (T2) работает при давлении, на 4-12 бар, предпочтительно на 6-10 бар меньше, чем давление на 1-й ступени разделения (T1).8. The method according to p. 4, characterized in that the 2nd separation stage (T2) operates at a pressure of 4-12 bar, preferably 6-10 bar less than the pressure at the 1st separation stage (T1). 9. Способ по одному из пп. 1, 2, 5, 7 или 8, отличающийся тем, что расширение (X) газообразной фракции (2) протекает с совершением работы, которая используется для выработки электроэнергии в генераторе (G) и/или для сжатия богатой метаном газовой фракции (5').9. The method according to one of paragraphs. 1, 2, 5, 7 or 8, characterized in that the expansion (X) of the gaseous fraction (2) proceeds with the completion of work that is used to generate electricity in the generator (G) and / or to compress the methane-rich gas fraction (5 ' ) 10. Способ по п. 3, отличающийся тем, что расширение (X) газообразной фракции (2) протекает с совершением работы, которая используется для выработки электроэнергии в генераторе (G) и/или для сжатия богатой метаном газовой фракции (5').10. The method according to p. 3, characterized in that the expansion (X) of the gaseous fraction (2) proceeds with the completion of work that is used to generate electricity in the generator (G) and / or for compression of the methane-rich gas fraction (5 '). 11. Способ по п. 4, отличающийся тем, что расширение (X) газообразной фракции (2) протекает с совершением работы, которая используется для выработки электроэнергии в генераторе (G) и/или для сжатия богатой метаном газовой фракции (5').11. The method according to p. 4, characterized in that the expansion (X) of the gaseous fraction (2) proceeds with the completion of work, which is used to generate electricity in the generator (G) and / or to compress the methane-rich gas fraction (5 '). 12. Способ по п. 6, отличающийся тем, что расширение (X) газообразной фракции (2) протекает с совершением работы, которая12. The method according to p. 6, characterized in that the expansion (X) of the gaseous fraction (2) proceeds with the completion of work, which используется для выработки электроэнергии в генераторе (G) и/или для сжатия богатой метаном газовой фракции (5').used to generate electricity in a generator (G) and / or to compress a methane-rich gas fraction (5 ').
RU2015136852A 2015-07-16 2015-08-28 Method of extracting ethane from a gas fraction with high content of hydrocarbons RU2689866C2 (en)

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US6116050A (en) * 1998-12-04 2000-09-12 Ipsi Llc Propane recovery methods
DE10140585A1 (en) * 2001-08-18 2003-02-27 Linde Ag Separation of lower hydrocarbons comprises operating de-ethanizer at no less than de-methanizer pressure and combines head fractions for at least an interval
DE10140584A1 (en) * 2001-08-18 2003-02-27 Linde Ag Separation of lower hydrocarbons comprises use of de-methanizer and de-ethanizer, employing one or more defined strategies
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