EP0711967A2 - Procédé pour la liquéfaction d'une fraction riche en hydrocarbures sous pression - Google Patents

Procédé pour la liquéfaction d'une fraction riche en hydrocarbures sous pression Download PDF

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Publication number
EP0711967A2
EP0711967A2 EP95117284A EP95117284A EP0711967A2 EP 0711967 A2 EP0711967 A2 EP 0711967A2 EP 95117284 A EP95117284 A EP 95117284A EP 95117284 A EP95117284 A EP 95117284A EP 0711967 A2 EP0711967 A2 EP 0711967A2
Authority
EP
European Patent Office
Prior art keywords
rich fraction
gas
hydrocarbon
expansion valve
boiloff
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95117284A
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German (de)
English (en)
Other versions
EP0711967A3 (fr
Inventor
Hans Dr.-Ing. Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Publication of EP0711967A2 publication Critical patent/EP0711967A2/fr
Publication of EP0711967A3 publication Critical patent/EP0711967A3/fr
Withdrawn legal-status Critical Current

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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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
    • F25J1/0055—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream originating from an incorporated cascade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—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"
    • F25J1/004—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" by flash gas recovery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—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"
    • F25J1/0045—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" by vaporising a liquid return 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0211—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle
    • F25J1/0212—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle as a single flow MCR cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
    • F25J2205/66—Regenerating the adsorption vessel, e.g. kind of reactivation 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
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic 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
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
    • F25J2220/62—Separating low boiling components, e.g. He, H2, N2, Air
    • 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
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
    • F25J2220/64—Separating heavy hydrocarbons, e.g. NGL, LPG, C4+ hydrocarbons or heavy condensates in general
    • 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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/60—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being hydrocarbons or 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
    • F25J2245/90—Processes or apparatus involving steps for recycling of process streams the recycled stream being boil-off gas from storage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2280/00—Control of the process or apparatus
    • F25J2280/02—Control in general, load changes, different modes ("runs"), measurements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S62/00—Refrigeration
    • Y10S62/912—External refrigeration system

Definitions

  • the invention relates to a for liquefying a pressurized hydrocarbon-rich fraction, in which it is cooled and liquefied in heat exchange with process streams to be heated and is then expanded into a storage tank by means of a pressure relief valve, and the boiloff gas emerging from the storage tank, which may be one of the forms process streams to be heated, is compressed in one or more stages.
  • tank return gas that is to say the sum of the boiloff gas and the flash gas formed when the hydrocarbon-rich fraction is released into the storage tank.
  • a large number of processes for liquefying a pressurized hydrocarbon-rich fraction, in particular natural gas are known.
  • a process for liquefying natural gas is known in which a pressurized natural gas stream is brought into heat exchange with two refrigerants conducted in closed circuits.
  • the refrigerant of the first circuit is used for pre-cooling the natural gas and the refrigerant of the second circuit, and the refrigerant of the second circuit is used to liquefy the pre-cooled natural gas.
  • the flash or boiloff gas is compressed in this process after the heat exchange with the pre-cooled natural gas, at least partially liquefied in heat exchange with the refrigerants of the first and second circuits and expanded again.
  • the Boiloff gas compressors have so far been operated independently of the system load.
  • the liquid natural gas obtained in such a process is stored in large storage tanks. Storage usually takes place under atmospheric pressure.
  • the so-called Boiloff gas is continuously formed within these storage tanks, which is drawn off from these storage tanks and, if necessary, warmed against the natural gas stream to be cooled, before it is fed to a one- or multi-stage compression.
  • the Boiloff gas compressor (s) are operated independently of the system load, at times in which less Boiloff gas is formed, the internal pressure in the storage container and thus the compressor suction pressure is generated by the compressor (s) reduced or the compressors work under partial load or switch off. This leads to the fact that the amount of liquefied natural gas that is fed into the storage container is reduced due to the higher flash gas content at a lower storage container pressure.
  • the aim of the present invention is to provide a method in which, with a given refrigeration cycle, the maximum possible amount of a hydrocarbon-rich fraction can be fed to a storage tank at any time via an expansion valve.
  • the hydrocarbon-rich fraction under pressure is fed to an adsorption device A via line 1.
  • it is freed from freezable components, in particular from carbon dioxide and water, to the extent that the amounts of these components still contained in them cannot lead to the laying of lines and / or valves within the cold part of the system.
  • the pre-cleaned hydrocarbon-rich fraction is cooled in countercurrent to the process streams to be heated in the heat exchangers E1 and E2 and partially liquefied. It is fed to a separator D after removal from the heat exchanger E2, in which a separation of the C3+ hydrocarbons and the aromatics takes place.
  • the Boiloff gas generated within the storage container S is discharged via line 7 from the storage container S and, if necessary warmed in the heat exchangers E3, E2 and E1 against the hydrocarbon-rich fraction to be cooled.
  • the Boiloff gas is then fed to a compressor V, and is cooled by means of a further heat exchanger W after each compressor stage.
  • a one- or multi-stage compression of the heated Boiloff gas can be useful.
  • the compressed Boiloff gas is then fed via line 8, together with the fraction from line 3, to the adsorption device A as regeneration gas.
  • the regeneration gas loaded with the components afflicted with the adsorbent is discharged from the adsorption device A by means of line 8 '.
  • the cooling requirement required for cooling and liquefying the hydrocarbon-rich fraction is covered by an additional cooling circuit.
  • This refrigeration cycle is only shown schematically here, with the refrigerant or refrigerant mixture being led via lines 9 and 10 for cooling and partial liquefaction through heat exchangers E1, E2 and E3, relaxed in the expansion valves c and d and then relieved by means of line 9 ' is passed in counterflow to the hydrocarbon-rich fraction to be cooled through the heat exchangers E3, E2 and E1.
  • Mixtures of nitrogen and methane or mixtures of nitrogen, methane and C2 to C5 hydrocarbons have proven themselves as refrigerants.
  • such refrigeration circuits are part of the prior art, so that they do not need to be discussed in more detail.
  • the method according to the invention ensures that the internal pressure of the storage container S is at the optimum at all times. This means that the maximum possible amount of hydrocarbon-rich fraction can always be fed into the storage container S and stored in it.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP95117284A 1994-11-11 1995-11-02 Procédé pour la liquéfaction d'une fraction riche en hydrocarbures sous pression Withdrawn EP0711967A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4440406 1994-11-11
DE4440406A DE4440406C1 (de) 1994-11-11 1994-11-11 Verfahren zum Verflüssigen einer unter Druck stehenden kohlenwasserstoffreichen Fraktion

Publications (2)

Publication Number Publication Date
EP0711967A2 true EP0711967A2 (fr) 1996-05-15
EP0711967A3 EP0711967A3 (fr) 1997-02-05

Family

ID=6533120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117284A Withdrawn EP0711967A3 (fr) 1994-11-11 1995-11-02 Procédé pour la liquéfaction d'une fraction riche en hydrocarbures sous pression

Country Status (4)

Country Link
US (1) US5588307A (fr)
EP (1) EP0711967A3 (fr)
AR (1) AR000100A1 (fr)
DE (1) DE4440406C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10995910B2 (en) 2015-07-13 2021-05-04 Technip France Process for expansion and storage of a flow of liquefied natural gas from a natural gas liquefaction plant, and associated plant

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821242A1 (de) * 1998-05-12 1999-11-18 Linde Ag Verfahren und Vorrichtung zum Verflüssigen eines Kohlenwasserstoff-reichen Stromes
TW561230B (en) 2001-07-20 2003-11-11 Exxonmobil Upstream Res Co Unloading pressurized liquefied natural gas into standard liquefied natural gas storage facilities
KR101318966B1 (ko) 2005-03-16 2013-10-17 퓨얼코어 엘엘씨 합성 탄화수소 화합물 제조를 위한 시스템, 방법 및 조성물
GB2459484B (en) * 2008-04-23 2012-05-16 Statoilhydro Asa Dual nitrogen expansion process
DE102009038458A1 (de) * 2009-08-21 2011-02-24 Linde Ag Verfahren zum Abtrennen von Stickstoff aus Erdgas
CN108025804B (zh) * 2015-07-08 2020-05-05 大宇造船海洋株式会社 包括引擎的船舶、提高重新液化及自热交换效率的方法
RU2670478C1 (ru) * 2017-12-18 2018-10-23 Общество с ограниченной ответственностью "Газ Хим Технолоджи" Комплекс сжижения, хранения и отгрузки природного газа
NO20211391A1 (en) * 2021-11-19 2023-05-22 Econnect Energy As System and method for cooling of a liquefied gas product

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2820212A1 (de) 1978-05-09 1979-11-22 Linde Ag Verfahren zum verfluessigen von erdgas

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3878689A (en) * 1970-07-27 1975-04-22 Carl A Grenci Liquefaction of natural gas by liquid nitrogen in a dual-compartmented dewar
US4133663A (en) * 1976-03-29 1979-01-09 Air Products And Chemicals, Inc. Removing vinyl chloride from a vent gas stream
US5006138A (en) * 1990-05-09 1991-04-09 Hewitt J Paul Vapor recovery system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2820212A1 (de) 1978-05-09 1979-11-22 Linde Ag Verfahren zum verfluessigen von erdgas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10995910B2 (en) 2015-07-13 2021-05-04 Technip France Process for expansion and storage of a flow of liquefied natural gas from a natural gas liquefaction plant, and associated plant

Also Published As

Publication number Publication date
DE4440406C1 (de) 1996-04-04
EP0711967A3 (fr) 1997-02-05
US5588307A (en) 1996-12-31
AR000100A1 (es) 1997-05-21

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