EP4596951A2 - Verfahren zur expansion und lagerung eines stroms aus verflüssigtem erdgas aus einer erdgasverflüssigungsanlage und zugehörige anlage - Google Patents

Verfahren zur expansion und lagerung eines stroms aus verflüssigtem erdgas aus einer erdgasverflüssigungsanlage und zugehörige anlage

Info

Publication number
EP4596951A2
EP4596951A2 EP25183871.0A EP25183871A EP4596951A2 EP 4596951 A2 EP4596951 A2 EP 4596951A2 EP 25183871 A EP25183871 A EP 25183871A EP 4596951 A2 EP4596951 A2 EP 4596951A2
Authority
EP
European Patent Office
Prior art keywords
stream
flow
natural gas
flash
bypass
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.)
Pending
Application number
EP25183871.0A
Other languages
English (en)
French (fr)
Other versions
EP4596951A3 (de
Inventor
Sylvain Vovard
Vincent TIRILLY
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.)
Technip Energies France SAS
Original Assignee
Technip Energies France SAS
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 Technip Energies France SAS filed Critical Technip Energies France SAS
Publication of EP4596951A2 publication Critical patent/EP4596951A2/de
Publication of EP4596951A3 publication Critical patent/EP4596951A3/de
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F17C9/04—Recovery of thermal energy
    • 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
    • F25J1/0002—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
    • F25J1/0025—Boil-off gases "BOG" from storages
    • 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"
    • F25J1/0035—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 gas expansion with extraction of work
    • F25J1/0037—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 gas expansion with extraction of work of a 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
    • F25J1/003—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"
    • F25J1/0042—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 liquid expansion with extraction of work
    • 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
    • F25J1/0203—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 single-component refrigerant [SCR] fluid in a closed vapor compression cycle
    • F25J1/0208—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 single-component refrigerant [SCR] fluid in a closed vapor compression cycle in combination with an internal quasi-closed refrigeration loop, e.g. with deep flash recycle 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
    • 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
    • F25J1/0219—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 in combination with an internal quasi-closed refrigeration loop, e.g. using a deep flash recycle 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
    • 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
    • F25J1/0243—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
    • F25J1/0262—Details of the cold heat exchange system
    • F25J1/0264—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams
    • 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
    • F25J1/0243—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
    • F25J1/0269—Arrangement of liquefaction units or equipments fulfilling the same process step, e.g. multiple "trains" concept
    • F25J1/0271—Inter-connecting multiple cold equipments within or downstream of the cold box
    • 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
    • F25J1/0243—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
    • F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
    • F25J1/0277—Offshore use, e.g. during shipping
    • F25J1/0278—Unit being stationary, e.g. on floating barge or fixed platform
    • 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
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0285—Combination of different types of drivers mechanically coupled to the same refrigerant compressor, possibly split on multiple compressor casings
    • F25J1/0288—Combination of different types of drivers mechanically coupled to the same refrigerant compressor, possibly split on multiple compressor casings using work extraction by mechanical coupling of compression and expansion of the refrigerant, so-called companders
    • 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
    • F25J3/0204—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
    • F25J3/0214—Liquefied 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
    • F25J3/0257—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/02—Mixing fluids
    • F17C2265/022—Mixing fluids identical fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/033—Treating the boil-off by recovery with cooling
    • F17C2265/034—Treating the boil-off by recovery with cooling with condensing the gas phase
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0134—Applications for fluid transport or storage placed above the ground
    • F17C2270/0136—Terminals
    • 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
    • F25J2200/76—Refluxing the column with condensed overhead gas being cycled in a quasi-closed loop refrigeration 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
    • F25J2205/02—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
    • 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
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/04—Recovery of liquid products
    • 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
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/30—Dynamic liquid or hydraulic expansion with extraction of work, e.g. single phase or two-phase turbine
    • 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
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/04—Internal refrigeration with work-producing gas expansion 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
    • F25J2270/88—Quasi-closed internal refrigeration or heat pump cycle, if not otherwise provided

Definitions

  • Such a process is intended in particular to be implemented in floating installations for the production of liquefied natural gas, or in land-based liquefaction installations, with reduced space requirements.
  • natural gas In currently operating liquefied natural gas production plants, natural gas is condensed and subcooled at high pressure before undergoing flash expansion to atmospheric pressure.
  • the resulting liquefied natural gas can be stored at atmospheric pressure and at a cryogenic temperature, typically around -160°C.
  • the expansion is carried out either directly at the liquefied natural gas storage tank or in a dedicated unit, for example a flash gas recovery unit.
  • the steam generated by the expansion is recovered, then compressed in a dedicated compressor to form a combustible gas stream, or to be recycled within the liquefaction train.
  • Another stream of vapour is generated in the liquefied natural gas storage tank, due to the pressure difference between the liquid directly from the expansion and that present in the storage tank and/or due to the heating of the liquefied natural gas during its transport to the tank.
  • a gaseous flow of evaporation gas from the tank is therefore recovered and compressed in another dedicated compressor, to form a stream of combustible gas or to be recycled within the unit, particularly when the unit is a floating unit.
  • DE102010062050 describes a process in which the flash gas stream and the boil-off gas stream are mixed and then jointly compressed in a common compressor to form the fuel gas stream.
  • An aim of the invention is therefore to obtain a particularly compact and economical process for recovering flash gases and evaporation gases from a natural gas liquefaction installation by using one or more compressors dedicated to the two functions.
  • upstream and downstream generally extend in relation to the normal direction of circulation of a fluid.
  • the additional turbines described drive compressors, but can also drive variable frequency electric generators whose electricity can be used in the network via a frequency converter.
  • Streams with a temperature above ambient are described as being cooled by air coolers.
  • water exchangers such as fresh water or sea water, can be used.
  • the ambient temperature around the installation is not significant for the purposes of the invention and may be between 15°C and 35°C.
  • a first installation 10 for the expansion and storage of liquefied natural gas from a natural gas liquefaction installation 12 is schematically illustrated by the figure 1 .
  • the installations 10, 12 are advantageously carried by a support 14 located on the surface of a body of water, such as a sea, a lake, an ocean or a river.
  • the support 14 is for example a floating barge and constitutes a floating natural gas liquefaction unit (FLNG).
  • FLNG floating natural gas liquefaction unit
  • the liquefaction installation 12 comprises, in a known manner, a natural gas treatment unit 16, capable of producing a treated gas free of compounds capable of solidifying during liquefaction, and a unit 18 for liquefying the treated gas, comprising at least one system (not shown) of cooling, liquefaction, and subcooling of the treated gas 20, capable of producing a stream 22 of liquefied natural gas under pressure.
  • the expansion and storage installation 10 comprises a device 24 for expanding the stream of pressurized liquefied natural gas 22, here comprising a dynamic expansion turbine 25 and an end-of-flash capacity, in this particular example an end-of-flash tank 26. It also comprises at least one tank 28 for recovering liquefied natural gas, and a compression device 30, capable of recovering and compressing both the flash gas from the tank 26 and the evaporation gas from the or each tank 28, to form a compressed stream of combustible gas 32.
  • the installation 10 further comprises a downstream compressor 34, intended to compress a bypass stream 36 taken from the compressed combustible gas stream 32, and at least one dynamic expansion turbine 38, capable of expanding the bypass stream 36.
  • the installation 10 further comprises a downstream heat exchanger 40 and an additional heat exchanger 41 intended for the liquefaction of at least part of the treated gas 20, using the cold produced during the dynamic expansion of the bypass current 36 in the turbine 38.
  • the exchangers 40 and 41 are intended for the cooling and at least partial liquefaction of a part of the bypass stream 36, when an excess of flash gas and/or evaporation gas is present in the compressed combustible gas stream 32.
  • the liquefied natural gas stream 22 has a pressure for example greater than 60 bar, and can be between 40 bar and 80 bar.
  • Stream 22 is subcooled.
  • the temperature of liquefied natural gas stream 22 is typically below -150°C but can be between -140°C and -160°C.
  • Stream 22 advantageously has a molar methane content greater than 80%, and a molar C 4 + content less than 5%.
  • the molar flow rate of the liquefied natural gas stream 22 is, for example, greater than 10,000 kmol/h.
  • the stream of liquefied natural gas 22 is conveyed to the dynamic expansion turbine 25 of the expansion device 24 to undergo flash expansion and form a stream 42 of expanded liquefied natural gas.
  • the pressure of the expanded liquefied natural gas stream 42 is, for example, less than 7 bar, in particular between 6 bar and 12 bar.
  • the expansion of stream 22 causes the formation in stream 42 of a residual flash gas downstream of the final expansion valve.
  • the molar content of flash gas in stream 42 is for example greater than 5% and is in particular between 4% and 10%.
  • the stream 42 is then introduced into the end-of-flash tank 26, to recover, at the foot of the tank 26, a liquid flow 46 of liquefied natural gas, and at the head of the tank 26, a gaseous flow 48 of flash gas.
  • the liquid flow 46 is then conveyed to a storage tank 28.
  • the flow 46 is pumped through a pump 50. Alternatively, it flows by gravity into the reservoir 28, without being pumped.
  • a residual evaporation gas (“boil off gas” in English) is formed from the liquid flow 46, in particular by reheating the liquid flow 46 in the transport pipes, by the heat inputs of the tank(s) 28 and/or under the effect of a pressure difference between the tank 26 and the tank 28.
  • a gaseous flow 52 of evaporation gas is recovered at the top of the tank 28.
  • the gaseous flow of evaporation gas 52 is heated in the downstream heat exchanger 40, for example to a temperature above -60°C.
  • the gas flow 48 of flash gas is heated in the additional heat exchanger 41, for example to a temperature above -60°C.
  • the gas stream 48 represents between 30 mol% and 80 mol% of the mixing gas stream 54.
  • the mixture gas stream 54 is then introduced into the compression apparatus 30 to form a compressed combustible gas stream 32.
  • the stream 54 passes successively through a first compressor 56, a first air-cooling exchanger or a water exchanger 58 to be cooled to ambient temperature, a second compressor 60, then a second exchanger 62 to be cooled again to ambient temperature or water temperature.
  • the pressure of the compressed combustible gas stream 32 is for example greater than 25 bar and is in particular between 5 bar and 70 bar.
  • the composition of stream 32 is typically 15 mol% nitrogen and 85 mol% methane.
  • the compressed combustible gas stream 32 is then recovered to be used as fuel in the installation 12, or as a make-up fluid in this installation 12.
  • a bypass stream 36 is taken from the combustible gas stream 32.
  • the molar flow rate of the bypass stream 36 is for example greater than 10% of the molar flow rate of the combustible gas stream 32 coming from the compression device 30, and is in particular between 10% and 100% of this flow rate.
  • bypass stream 36 is then compressed in the compressor 34, and is then cooled to room temperature in the air-cooling exchanger or the water exchanger 64, to form a compressed bypass stream 66.
  • the pressure of the compressed bypass stream 66 is for example 30 bar higher than the pressure of the stream 32.
  • the stream 66 is then introduced into the downstream heat exchanger 40 to be cooled there to a temperature advantageously below -50°C.
  • the temperature of the stream 68 is preferably less than -150°C and is in particular between -140°C and -160°C.
  • the expanded bypass stream 68 is optionally at least partially liquid.
  • the molar liquid content in stream 68 is typically less than 15 mol%.
  • stream 68 remains completely gaseous.
  • the entire expanded bypass stream 68 forms a first flow 70 which is then introduced into the downstream heat exchanger 40 to be reheated there.
  • the temperature of the first reheated flow 71 is advantageously greater than -60°C.
  • the first reheated flow 71 is then reintroduced into the mixing stream 54, downstream of the end-of-flash tank 26, and upstream of the compression device 30.
  • At least one gaseous stream of treated gas 72 from the installation 12 is diverted to the installation 10.
  • the gas stream 72 has a pressure for example greater than 60 bar, and in particular between 40 bar and 90 bar.
  • the temperature of the gas stream is typically equal to ambient or pre-cooled temperature.
  • Gas stream 72 has a molar methane content greater than 80%, and a molar C4 + content less than 5%.
  • the molar flow rate of the gas stream 72 can represent up to 10% of the flow rate of the initial charge of natural gas introduced into the liquefaction installation 12.
  • the gas stream 72 is then separated into a first part 74 and a second part 76.
  • the molar flow rate of the first part 74 of the gas stream 72 constitutes for example between 20% and 50% molar of the gas stream 72 and the molar flow rate of the second part 76 of the gas stream 72 constitutes for example between 50% and 80% of the molar flow rate of the gas stream 72.
  • the first part 74 of the gas stream 72 is then introduced into the downstream heat exchanger 40 to be cooled and liquefied by heat exchange, in particular with the expanded bypass stream 68, to a temperature advantageously lower than -150°C.
  • the first portion 74 then passes through a control valve 78, before being mixed with the expanded liquefied natural gas stream 42 from the expansion device 24.
  • the second part 76 of the gas stream 72 is introduced into the additional heat exchanger 41 to be cooled and liquefied by heat exchange with the gas stream of flash gas 48, down to a temperature advantageously lower than - 150°C.
  • the second part 76 then passes through a control valve 80, before being mixed with the expanded liquefied natural gas stream 42 from the expansion device 24.
  • the implementation of the method according to the invention is therefore particularly simple since it reduces the number of equipment required to flash liquefied natural gas for storage, and to advantageously recover the flash gases and evaporation gases produced.
  • a single compression apparatus 30 is used to compress a mixture stream 54 formed from the flash gases and the boil-off gases.
  • bypass stream 36 taken from the fuel stream 32 formed at the outlet of the compression device 30 makes it possible to obtain very efficient thermal integration, and to take advantage of the available frigories to at least partially liquefy the gas treated in the installation 12.
  • the thermal integration of the bypass current 36 makes it possible to adjust the frigories between the different operating modes of the installation 10, between the phases of filling the tanks, and the phases of loading a methane carrier.
  • the method according to the invention and the installation 10 allowing its implementation are therefore particularly suitable for a floating unit such as an FLNG.
  • a portion 90 of the gaseous flow of boil-off gas is sent to other liquefaction trains.
  • a stream of liquefied natural gas 92 from other liquefaction trains is introduced into the tank 28.
  • a second installation 110 according to the invention is illustrated by the figure 2
  • the second installation 110 differs from the first installation 10 in the sense that it comprises a downstream tank 112, placed at the outlet of the dynamic expansion turbine 38.
  • the expanded bypass stream 68 is introduced into the downstream tank 112 to recover, at the top, the first flow 70 in gaseous form, and at the bottom, a second liquid flow 114.
  • the molar flow rate of the second stream 114 constitutes, for example, between 10% and 15% of the molar flow rate of the expanded bypass stream 68.
  • the first flow 70 is introduced into the downstream heat exchanger 40 to be reheated by heat exchange in particular with the first part 74 of the gaseous stream 72 of treated gas.
  • the second flow 114 is reintroduced into the expanded liquefied natural gas stream 42 coming from the expansion device 24, upstream of the end-of-flash tank 26.
  • the second method according to the invention optimizes the distribution of the liquid in the downstream heat exchanger 40.
  • a third installation 120 intended for the implementation of a third method according to the invention, is illustrated by the figure 3 .
  • a recirculation stream 122 is taken from the compressed bypass stream 66.
  • the recirculation stream 122 represents, for example, between 30% and 80% molar of the compressed bypass stream 66 from the compressor 34.
  • the recirculation stream 122 is then separated into a first portion 124 and a second portion 126.
  • the molar flow rate of the first part 124 of the recirculation stream 122 constitutes for example between 20% and 50% molar of the recirculation stream 122 and the molar flow rate of the second part 126 of the recirculation stream 122 constitutes for example between 50% and 80% of the molar flow rate of the recirculation stream 122.
  • the first part 124 of the recirculation stream 122 is introduced into the downstream heat exchanger 40 to be cooled there, and possibly at least partially liquefied, by heat exchange in particular with the expanded bypass stream 68, down to a temperature advantageously lower than -150°C.
  • the first portion 124 then passes through a control valve 128, before being mixed with the expanded liquefied natural gas stream 42 from the expansion device 24.
  • the second part 126 of the bypass stream 122 is introduced into the additional heat exchanger 41, to be cooled there and possibly at least partially liquefied by heat exchange with the gaseous flow of flash gas 48, down to a temperature advantageously lower than -150°C.
  • the second part 126 then passes through a control valve 130, before being mixed with the expanded liquefied natural gas stream 42 from the expansion device 24.
  • bypass stream 36 taken from the fuel stream 32 formed at the outlet of the compression apparatus 30 makes it possible to obtain very efficient thermal integration, and to take advantage of the available frigories to at least partially liquefy a recirculation stream 122 from the bypass stream, when an excess of flash gas and/or evaporation gas occurs.
  • At least a portion 76 of the gaseous stream of treated gas 72 from the installation 12 is also introduced into the additional heat exchanger 41, as described above for the figure 2 .
  • a fourth installation 130 intended for the implementation of a fourth method according to the invention, is illustrated by the figure 4 .
  • This installation 130 differs from the installation 10 shown in the figure 1 in that the end-of-flash flask 26 is replaced by an end-of-flash distillation column 132.
  • a reboiling exchanger 134 is arranged upstream of the expansion device 24 to put the liquefied natural gas stream 22 into heat exchange relation with a reboiling stream 136 coming from the column 132.
  • a fifth installation 140 intended for the implementation of a fifth method according to the invention, is illustrated by the Figure 5 .
  • This installation 140 differs from the installation 120 shown on the figure 3 in that the end-of-flash flask 26 is replaced by an end-of-flash distillation column 132.
  • the implementation of the fifth method according to the invention is also similar to that of the third method according to the invention.
  • a sixth installation 150 intended for the implementation of a sixth method according to the invention, is illustrated by the figure 6 .
  • the sixth installation 150 differs from the fourth installation 130 by the insertion of an intermediate balloon 152 between the outlet of the expansion device 24 and the inlet of the distillation column 132.
  • the intermediate tank 152 receives the expanded liquefied natural gas stream 42 and separates it into a head stream 154, mixed with the gaseous stream 48 of flash gas, and into a bottom stream 156, introduced into the reboiling exchanger 134 before reaching the distillation column 132.
  • This installation 150 is beneficial for the recovery of helium in the case where the gaseous stream 154 is rich in helium, typically consisting of at least 25% helium, and can therefore be advantageously sent to a helium purification installation.
  • a downstream tank 112 is provided to separate the expanded bypass stream 68, as described in the second method according to the invention.
  • the dynamic expansion turbine 25 of the expansion device 24 is replaced by a static expansion valve.
  • the stream of liquefied natural gas then undergoes static and not dynamic expansion in the expansion device 24.
  • the method according to the invention and the corresponding installation are therefore particularly suitable for managing the significant variations in temperature and flow rate of the evaporation gas flow 52 coming from the tank 28 between the phases of loading a methane carrier by emptying the tank and the phases of filling the tank.
  • thermal integration of the bypass stream 36 with the boil-off gas stream 52 is used to adjust the required frigories, and vary the relative flow rates of the fuel gas stream 32 and the bypass stream 36.
  • Clause 4. Method according to any one of clauses 1 to 3, in which the compressed bypass stream (66) from the downstream compressor (34) is introduced into the downstream heat exchanger (40) to be put into heat exchange relation with the first flow (70).
  • Clause 7. - Method according to clause 6, comprising introducing the first part (74) of the liquefied treated natural gas stream (72) into the expanded liquefied natural gas stream (42) from the expansion device (24), upstream of an end-of-flash capacity (26; 132).
  • Clause 10. A method according to any one of clauses 1 to 9, wherein the end-flash capacity (26; 132) is an end-flash drum (26) or an end-flash distillation column (132).
  • Clause 15. Installation according to any one of clauses 12 to 14, in which the downstream heat exchanger (40) is capable of putting into heat exchange relation the first flow (68; 70), and at least a part (74) of a treated gas stream (72) intended to be liquefied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Ocean & Marine Engineering (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP25183871.0A 2015-07-13 2016-07-12 Verfahren zur expansion und lagerung eines stroms aus verflüssigtem erdgas aus einer erdgasverflüssigungsanlage und zugehörige anlage Pending EP4596951A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1556656A FR3038964B1 (fr) 2015-07-13 2015-07-13 Procede de detente et de stockage d'un courant de gaz naturel liquefie issu d'une installation de liquefaction de gaz naturel, et installation associee
PCT/EP2016/066544 WO2017009341A1 (fr) 2015-07-13 2016-07-12 Procédé de détente et de stockage d'un courant de gaz naturel liquéfié issu d'une installation de liquéfaction de gaz naturel, et installation associée
EP16741582.7A EP3322948B1 (de) 2015-07-13 2016-07-12 Verfahren zur expansion und lagerung eines stroms aus verflüssigtem erdgas aus einer erdgasverflüssigungsanlage und zugehörige anlage

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP16741582.7A Division-Into EP3322948B1 (de) 2015-07-13 2016-07-12 Verfahren zur expansion und lagerung eines stroms aus verflüssigtem erdgas aus einer erdgasverflüssigungsanlage und zugehörige anlage
EP16741582.7A Division EP3322948B1 (de) 2015-07-13 2016-07-12 Verfahren zur expansion und lagerung eines stroms aus verflüssigtem erdgas aus einer erdgasverflüssigungsanlage und zugehörige anlage

Publications (2)

Publication Number Publication Date
EP4596951A2 true EP4596951A2 (de) 2025-08-06
EP4596951A3 EP4596951A3 (de) 2026-01-28

Family

ID=54145888

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16741582.7A Active EP3322948B1 (de) 2015-07-13 2016-07-12 Verfahren zur expansion und lagerung eines stroms aus verflüssigtem erdgas aus einer erdgasverflüssigungsanlage und zugehörige anlage
EP25183871.0A Pending EP4596951A3 (de) 2015-07-13 2016-07-12 Verfahren zur expansion und lagerung eines stroms aus verflüssigtem erdgas aus einer erdgasverflüssigungsanlage und zugehörige anlage

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16741582.7A Active EP3322948B1 (de) 2015-07-13 2016-07-12 Verfahren zur expansion und lagerung eines stroms aus verflüssigtem erdgas aus einer erdgasverflüssigungsanlage und zugehörige anlage

Country Status (7)

Country Link
US (1) US10995910B2 (de)
EP (2) EP3322948B1 (de)
JP (1) JP6800204B2 (de)
KR (1) KR102523737B1 (de)
CN (1) CN108027197B (de)
FR (1) FR3038964B1 (de)
WO (1) WO2017009341A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3049341B1 (fr) * 2016-03-23 2019-06-14 Cryostar Sas Systeme de traitement d'un gaz issu de l'evaporation d'un liquide cryogenique et d'alimentation en gaz sous pression d'un moteur a gaz
IT201900025078A1 (it) * 2019-12-20 2021-06-20 Fpt Ind Spa Metodo e relativo apparato per produrre gas liquefatti
JP7265516B2 (ja) * 2020-11-26 2023-04-26 大陽日酸株式会社 液体ヘリウム移液時の貯槽内圧力保持方法及び装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010062050A1 (de) 2010-11-26 2012-05-31 Siemens Aktiengesellschaft Flüssigerdgasanlage und Verfahren zum Betrieb

Family Cites Families (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3323315A (en) * 1964-07-15 1967-06-06 Conch Int Methane Ltd Gas liquefaction employing an evaporating and gas expansion refrigerant cycles
US3331214A (en) 1965-03-22 1967-07-18 Conch Int Methane Ltd Method for liquefying and storing natural gas and controlling the b.t.u. content
GB1288762A (de) 1968-09-16 1972-09-13
US3581511A (en) 1969-07-15 1971-06-01 Inst Gas Technology Liquefaction of natural gas using separated pure components as refrigerants
US3690114A (en) * 1969-11-17 1972-09-12 Judson S Swearingen Refrigeration process for use in liquefication of gases
GB1471404A (en) 1973-04-17 1977-04-27 Petrocarbon Dev Ltd Reliquefaction of boil-off gas
GB1472533A (en) 1973-06-27 1977-05-04 Petrocarbon Dev Ltd Reliquefaction of boil-off gas from a ships cargo of liquefied natural gas
DE2820212A1 (de) * 1978-05-09 1979-11-22 Linde Ag Verfahren zum verfluessigen von erdgas
US4435198A (en) * 1982-02-24 1984-03-06 Phillips Petroleum Company Separation of nitrogen from natural gas
US4525185A (en) 1983-10-25 1985-06-25 Air Products And Chemicals, Inc. Dual mixed refrigerant natural gas liquefaction with staged compression
US4541852A (en) 1984-02-13 1985-09-17 Air Products And Chemicals, Inc. Deep flash LNG cycle
US4689962A (en) 1986-01-17 1987-09-01 The Boc Group, Inc. Process and apparatus for handling a vaporized gaseous stream of a cryogenic liquid
US5137558A (en) 1991-04-26 1992-08-11 Air Products And Chemicals, Inc. Liquefied natural gas refrigeration transfer to a cryogenics air separation unit using high presure nitrogen stream
FR2682964B1 (fr) * 1991-10-23 1994-08-05 Elf Aquitaine Procede de deazotation d'un melange liquefie d'hydrocarbures consistant principalement en methane.
DE4440406C1 (de) 1994-11-11 1996-04-04 Linde Ag Verfahren zum Verflüssigen einer unter Druck stehenden kohlenwasserstoffreichen Fraktion
JP3868033B2 (ja) 1996-07-05 2007-01-17 三菱重工業株式会社 Ｌｎｇボイルオフガスの再液化方法及びその装置
MY117068A (en) 1998-10-23 2004-04-30 Exxon Production Research Co Reliquefaction of pressurized boil-off from pressurized liquid natural gas
JP3908881B2 (ja) 1999-11-08 2007-04-25 大阪瓦斯株式会社 ボイルオフガスの再液化方法
FR2818365B1 (fr) * 2000-12-18 2003-02-07 Technip Cie Procede de refrigeration d'un gaz liquefie, gaz obtenus par ce procede, et installation mettant en oeuvre celui-ci
MY140540A (en) * 2004-07-12 2009-12-31 Shell Int Research Treating liquefied natural gas
US20060156758A1 (en) 2005-01-18 2006-07-20 Hyung-Su An Operating system of liquefied natural gas ship for sub-cooling and liquefying boil-off gas
WO2006135363A1 (en) 2005-06-09 2006-12-21 Mustang Engineering, L.P. Apparatus and methods for processing hydrocarbons to produce liquified natural gas
JP2006348080A (ja) 2005-06-13 2006-12-28 Mitsui Eng & Shipbuild Co Ltd ボイルオフガスの処理方法及び装置
JP2009501896A (ja) 2005-07-19 2009-01-22 シンヨン ヘビー インダストリーズ カンパニー，リミティド Ｌｎｇｂｏｇ再液化装置
FR2891900B1 (fr) * 2005-10-10 2008-01-04 Technip France Sa Procede de traitement d'un courant de gnl obtenu par refroidissement au moyen d'un premier cycle de refrigeration et installation associee.
US7581411B2 (en) 2006-05-08 2009-09-01 Amcs Corporation Equipment and process for liquefaction of LNG boiloff gas
KR100804953B1 (ko) 2007-02-13 2008-02-20 대우조선해양 주식회사 냉동 부하 가변 운전이 가능한 증발가스 재액화 장치 및방법
JP2009030675A (ja) 2007-07-25 2009-02-12 Mitsubishi Heavy Ind Ltd ガス再液化装置およびガス再液化方法
US8555672B2 (en) * 2009-10-22 2013-10-15 Battelle Energy Alliance, Llc Complete liquefaction methods and apparatus
EP2265854A4 (de) 2008-04-11 2017-11-15 Fluor Technologies Corporation Verfahren und konfigurierung der handhabung von boil-off-gas in lng-regasifizierungsterminals
GB2462125B (en) 2008-07-25 2012-04-04 Dps Bristol Holdings Ltd Production of liquefied natural gas
US20100139317A1 (en) 2008-12-05 2010-06-10 Francois Chantant Method of cooling a hydrocarbon stream and an apparatus therefor
FR2944523B1 (fr) 2009-04-21 2011-08-26 Technip France Procede de production d'un courant riche en methane et d'une coupe riche en hydrocarbures en c2+ a partir d'un courant de gaz naturel de charge, et installation associee
KR101191241B1 (ko) 2009-10-20 2012-10-16 대우조선해양 주식회사 액화가스 수송선의 증발가스 재액화 장치
FR2954345B1 (fr) 2009-12-18 2013-01-18 Total Sa Procede de production de gaz naturel liquefie ayant un pouvoir calorifique superieur ajuste
DE102010062044A1 (de) 2010-11-26 2012-05-31 Siemens Aktiengesellschaft Flüssigerdgasanlage und Verfahren zum Betrieb
KR101797610B1 (ko) 2010-11-29 2017-12-13 대우조선해양 주식회사 연료가스 공급시스템 및 연료가스 공급시스템의 증발가스 재액화 방법
US20140069118A1 (en) 2011-03-22 2014-03-13 Daewoo Shipbuilding & Marine Engineering Co., Ltd. Method and system for supplying fuel to high-pressure natural gas injection engine
EP2690274A4 (de) 2011-03-22 2016-07-13 Daewoo Shipbuilding&Marine Engineering Co Ltd System zur kraftstoffversorgung eines hochdruckerdgaseinspritzmotors mit einer vorrichtung für den verbrauch von überschüssigem verdampfungsgas
GB2486036B (en) * 2011-06-15 2012-11-07 Anthony Dwight Maunder Process for liquefaction of natural gas
KR101521573B1 (ko) 2012-01-25 2015-05-20 대우조선해양 주식회사 액화가스 수송선의 증발가스 재액화 장치
KR101220208B1 (ko) * 2012-05-22 2013-01-09 연세대학교 산학협력단 천연가스와 열교환에 의하여 에너지를 저감시키기 위한 천연가스 액화방법
CN203463934U (zh) 2013-07-30 2014-03-05 江苏中核华纬工程设计研究有限公司 一种利用液化天然气冷能的合成氨驰放气处理装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010062050A1 (de) 2010-11-26 2012-05-31 Siemens Aktiengesellschaft Flüssigerdgasanlage und Verfahren zum Betrieb

Also Published As

Publication number Publication date
EP3322948A1 (de) 2018-05-23
US10995910B2 (en) 2021-05-04
CN108027197B (zh) 2020-06-19
WO2017009341A1 (fr) 2017-01-19
JP6800204B2 (ja) 2020-12-16
US20180202610A1 (en) 2018-07-19
EP3322948B1 (de) 2026-03-11
JP2018523805A (ja) 2018-08-23
KR20180030048A (ko) 2018-03-21
CN108027197A (zh) 2018-05-11
FR3038964B1 (fr) 2017-08-18
EP4596951A3 (de) 2026-01-28
KR102523737B1 (ko) 2023-04-19
FR3038964A1 (fr) 2017-01-20

Similar Documents

Publication Publication Date Title
CA2744450C (fr) Procede de production d'un courant de gaz naturel liquefie sous-refroidi a partir d'un courant de charge de gaz naturel et installation associee
FR3053771B1 (fr) Procede de liquefaction de gaz naturel et de recuperation d'eventuels liquides du gaz naturel comprenant deux cycles refrigerant semi-ouverts au gaz naturel et un cycle refrigerant ferme au gaz refrigerant
EP2724100B1 (de) Verfahren zur verflüssigung von erdgas mit einem geschlossenen dreifach-kühlgaskreislauf
EP2344821B1 (de) Verfahren zur erzeugung von flüssigen und gasförmigen stickstoffströmen, heliumreicher, gasförmiger strom und stickstoffabgereicherter kohlenwasserstoffstrom und zugehörige anlage
EP2659211B1 (de) Verfahren zur herstellung eines methanreichen stroms und eines c2+kohlenwasserstoffreichen stroms sowie zugehörige anlage
EP1118827B1 (de) Verfahren zur partiellen Verflüssigung einer kohlenwasserstoffreichen Fraktion wie Erdgas
EP2724099A2 (de) Verfahren zur verflüssigung von erdgas mit einer kühlgasmischung
EP2959242B1 (de) Station zum herabsetzen eines gasdrucks und zur gasverflüssigung
WO2010109130A1 (fr) Procédé de traitement d'un gaz naturel de charge pour obtenir un gaz naturel traité et une coupe d'hydrocarbures en c5 +, et installation associée
EP3322948B1 (de) Verfahren zur expansion und lagerung eines stroms aus verflüssigtem erdgas aus einer erdgasverflüssigungsanlage und zugehörige anlage
FR3053770B1 (fr) Procede de liquefaction de gaz naturel et de recuperation d'eventuels liquides du gaz naturel comprenant un cycle refrigerant semi-ouvert au gaz naturel et deux cycles refrigerant fermes au gaz refrigerant
EP4248158A1 (de) Verfahren zur herstellung von flüssigerdgas aus erdgas und entsprechende anlage
WO2015059233A1 (fr) Procédé de fractionnement d'un courant de gaz craqué, mettant en oeuvre un courant de recycle intermédiaire, et installation associée
WO2024003236A1 (fr) Dispositif et procédé de capture cryogénique de dioxyde de carbone contenu dans un flux de fluide cible
WO2011039476A1 (fr) Procede de traitement d'un effluent gazeux et installation de traitement associee
CA2957860A1 (fr) Methode pour eviter l'evaporation instantanee de gaz naturel liquefie en cours de transport

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AC Divisional application: reference to earlier application

Ref document number: 3322948

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Free format text: PREVIOUS MAIN CLASS: F17C0009040000

Ipc: F25J0001000000

RIC1 Information provided on ipc code assigned before grant

Ipc: F25J 1/00 20060101AFI20250929BHEP

Ipc: F25J 1/02 20060101ALI20250929BHEP

P01 Opt-out of the competence of the unified patent court (upc) registered

Free format text: CASE NUMBER: UPC_APP_9733_4596951/2025

Effective date: 20251013

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

RIC1 Information provided on ipc code assigned before grant

Ipc: F25J 1/00 20060101AFI20251219BHEP

Ipc: F25J 1/02 20060101ALI20251219BHEP