RU2005100838A - Способ сжижения богатого углеводородами потока с одновременным извлечением с3+ -богатой фракции с высоким выходом - Google Patents

Способ сжижения богатого углеводородами потока с одновременным извлечением с3+ -богатой фракции с высоким выходом Download PDF

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RU2005100838A
RU2005100838A RU2005100838/06A RU2005100838A RU2005100838A RU 2005100838 A RU2005100838 A RU 2005100838A RU 2005100838/06 A RU2005100838/06 A RU 2005100838/06A RU 2005100838 A RU2005100838 A RU 2005100838A RU 2005100838 A RU2005100838 A RU 2005100838A
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rich
fraction
stage
hydrocarbons
hydrocarbon
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RU2005100838/06A
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RU2317497C2 (ru
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Хайнц БАУЭР (DE)
Хайнц БАУЭР
Тило ШИВЕ (DE)
Тило ШИВЕ
Хуберт ФРАНКЕ (DE)
Хуберт ФРАНКЕ
Райнер ЗАППЕР (DE)
Райнер ЗАППЕР
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Линде Акциенгезельшафт (De)
Линде Акциенгезельшафт
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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
    • 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
    • F25J3/0257—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 nitrogen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/005—Processes comprising at least two steps in series
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/09—Purification; Separation; Use of additives by fractional condensation
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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
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    • 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
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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
    • F25J1/003—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
    • F25J1/0032—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 the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
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    • 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
    • F25J1/0032—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 the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
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    • 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
    • F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
    • F25J1/0248—Stopping of the process, e.g. defrosting or deriming, maintenance; Back-up mode or systems
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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
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    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
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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
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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
    • 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
    • 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
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/32—Details on header or distribution passages of heat exchangers, e.g. of reboiler-condenser or plate heat exchangers
    • 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.

Claims (9)

1. Способ сжижения богатого углеводородами потока, прежде всего потока природного газа, с одновременным извлечением С3+-богатой фракции с высоким выходом за счет теплообмена богатого углеводородами потока по меньшей мере с тремя имеющими различный состав смешанными хладагентами каскада соответственно из по меньшей мере трех холодильных циклов и разделения сжижаемого богатого углеводородами потока на С2--богатую фракцию, которую подвергают сжижению, и С3+-богатую фракцию, отличающийся тем, что
а) богатый углеводородами поток (1, 1') подвергают расширению (X) перед его разделением на С2--богатую фракцию и С3+-богатую фракцию,
б) подвергнутый расширению богатый углеводородами поток (2) подают на стадию абсорбции (Т1) углеводородов С3, разделяя его на этой стадии на подаваемую на сжижение (Е2, Е3) С2--богатую фракцию (3) и на первую конденсатную фракцию (8),
в) подаваемую на сжижение С2--богатую фракцию (3) сжимают (V) перед ее сжижением (Е2, Е3),
г) первую конденсатную фракцию (8) в подогретом (Е) состоянии подают на стадию отгонки (Т2) углеводородов С2,
д) в качестве кубового остатка, образующегося на стадии отгонки (Т2) углеводородов С2, получают с высоким выходом вторую, С3+-богатую конденсатную фракцию (11),
е) в качестве головной фракции, образующейся на стадии отгонки (Т2) углеводородов С2, отбирают С3--богатую газовую фракцию, которую частично конденсируют (Е), и полученный конденсат подают (10) на стадию абсорбции (Т1) углеводородов С3 в качестве абсорбента.
2. Способ по п.1, отличающийся тем, что богатый углеводородами поток (1, 1') перед его расширением (X) частично конденсируют и образующуюся при этом жидкую фракцию отделяют (D) и подают (9) на стадию отгонки (Т2) углеводородов C2.
3. Способ по п.2, отличающийся тем, что отделенную (D) жидкую фракцию, подаваемую на (9) стадию отгонки (Т2) углеводородов С2, предварительно расширяют (а) и/или подогревают (Е).
4. Способ по одному из пп.1-3, отличающийся тем, что давление богатого углеводородами потока (1, 1') при расширении (X) понижают на 10-60%.
5. Способ по одному из пп.1-3, отличающийся тем, что давление подвергаемой сжатию (V) С2--богатой фракции (7) при сжатии (V) повышают на 20-100%.
6. Способ по одному из пп.1-3, отличающийся тем, что расширение (X) и/или сжатие (V) проводят в несколько стадий.
7. Способ по одному из пп.1-3, отличающийся тем, что выделяющуюся при расширении (X) энергию используют для приведения в действие компрессора или компрессоров (V).
8. Способ по одному из пп.1-3, отличающийся тем, что стадию отгонки (Т2) углеводородов С2 проводят при давлении, которое несколько превышает, предпочтительно на 1-5 бар, давление, при котором проводят стадию абсорбции (Т1) углеводородов С3.
9. Способ по п.8, отличающийся тем, что давление первой конденсатной фракции (8) повышают путем ее перекачивания насосом (Р) до давления, преобладающего на стадии отгонки (Т2) углеводородов С2.
RU2005100838/06A 2002-06-14 2003-06-03 Способ сжижения богатого углеводородами потока с одновременным извлечением c3+-богатой фракции с высоким выходом RU2317497C2 (ru)

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