CN108106325A - Suitable for marine natural gas liquefaction system - Google Patents

Suitable for marine natural gas liquefaction system Download PDF

Info

Publication number
CN108106325A
CN108106325A CN201810014919.4A CN201810014919A CN108106325A CN 108106325 A CN108106325 A CN 108106325A CN 201810014919 A CN201810014919 A CN 201810014919A CN 108106325 A CN108106325 A CN 108106325A
Authority
CN
China
Prior art keywords
heat exchanger
main
deep cooling
cooling
precooling
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.)
Granted
Application number
CN201810014919.4A
Other languages
Chinese (zh)
Other versions
CN108106325B (en
Inventor
季鹏
郑雪枫
李婵
陈振中
潘红宇
赵甲递
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.)
China Huanqiu Engineering Co Ltd
Original Assignee
China Huanqiu Engineering Co Ltd
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 China Huanqiu Engineering Co Ltd filed Critical China Huanqiu Engineering Co Ltd
Priority to CN201810014919.4A priority Critical patent/CN108106325B/en
Publication of CN108106325A publication Critical patent/CN108106325A/en
Application granted granted Critical
Publication of CN108106325B publication Critical patent/CN108106325B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F25J1/02—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
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • 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
    • 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
    • F25J1/02—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
    • F25J1/0214—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 dual level refrigeration cascade with at least one 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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
    • F25J3/0209—Natural gas or substitute natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0233—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 1 carbon atom or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0238—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 2 carbon atoms or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/08—Separating gaseous impurities from gases or gaseous mixtures or from liquefied gases or liquefied gaseous mixtures
    • 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
    • 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
    • F25J2210/60—Natural gas or synthetic natural gas [SNG]
    • 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
    • F25J2260/00—Coupling of processes or apparatus to other units; Integrated schemes
    • F25J2260/20—Integration in an installation for liquefying or solidifying a fluid stream

Landscapes

  • 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)

Abstract

The present invention provides a kind of natural gas liquefaction system for being suitable for sea, including lighter hydrocarbons separator, mix refrigerant pre-cooling cycle, the main cryogenic heat exchanger of precooling, mix refrigerant deep cooling cycles, the main cryogenic heat exchanger of No.1 deep cooling and No. two main cryogenic heat exchangers of deep cooling, the lighter hydrocarbons separator includes domethanizing column, the tower overhead gas of the domethanizing column is through domethanizing column ice chest, after expansion compressor successively with the main cryogenic heat exchanger of the precooling, the main cryogenic heat exchanger of No.1 deep cooling and the main cryogenic heat exchanger of No. two deep coolings form heat exchange contact, again by entering LNG flash tanks after primary throttle valve, the LNG and BOG that LNG flash tanks can be isolated；The mix refrigerant pre-cooling cycle cryogenic heat exchanger main with the precooling forms heat exchange and contacts；The mix refrigerant deep cooling cycles cryogenic heat exchanger main with the No.1 deep cooling and No. two main cryogenic heat exchangers of deep cooling are respectively formed heat exchange and contact.The present invention can reduce the energy expenditure of liquefaction system, reduce system pressure, reduce propane disclosure risk.

Description

Suitable for marine natural gas liquefaction system
Technical field
The present invention relates to a kind of FLNG (Floating Liquefied Natural Gas are also known as LNG-FPSO) systems.
Background technology
Natural gas resource is widely distributed in the land and ocean in the whole world, is world's oil-gas exploration and development from land to ocean Inexorable trend.FLNG (Floating Liquefied Natural Gas are also known as LNG-FPSO) is ocean engineering in recent years What boundary proposed, integrate the new offshore installation of production, storage and the handling of liquefied natural gas, the exploitation for offshore gas field With construction period is short, development risk is small, convenient for migration and it is safe the features such as.
Operation on the sea need to consider the unfavorable factors such as typhoon, wave, space limitation so that the skill of floating natural gas liquefaction process Art difficulty is higher than land.As the core technology of FLNG, the reasonability of natural gas liquefaction process to the cost of investment of engineering project, Operating cost, operation reliability and production safety are most important.For the particularity of marine operating mode, due to cascade type liquefaction work Number of devices is more needed for skill, and compactedness is not high, and the storage capacity of refrigerant is larger, and being accordingly used in offshore natural gas liquefaction has centainly Difficulty.And mix refrigerant liquefaction process and nitrogen expansion liquefaction process seaworthiness are preferable.
Propane pre-cooling dinitrogen expansion natural gas liquefaction system largely uses pentane as refrigerant, propane tool in the prior art There is the characteristics of low boiling point, easily vaporization, when driving and parking operates, there are a large amount of propane in equipment and pipeline can cause pressure rise, increase The risk that big propane is released or leaked.Once leaking, since the density of propane is more than air, the product of fuel gas can be caused It is poly-, and FLNG Texas decks space is limited, facility compact, and diffusion conditions is poor, and the accidents such as burning, explosion easily occur.For Marine natural gas liquefaction system, security can be improved by avoiding the use of propane, reduce the investment of safety devices.
The yield and component of offshore gas field natural gas constantly change, and external environment is changing always, and FLNG devices should With transportable property, this requires natural gas liquefaction systems with flexible controllability, can be adjusted according to actual conditions pre- Cold section, cryogenic load reduce the heat transfer temperature difference of cold fluid and hot fluid, reduce liquefaction power consumption.Dinitrogen expansion cycles in the prior art Pressure is 8MPa, can not adjust the heat transfer temperature difference of different warm areas, and controllability is poor, high energy consumption.
The nitrogen pressure after expanded machine supercharger and compressor boost is up to 8MPa in the prior art, equipment and pipeline Pressure rating is high, and the weight of process equipment increases, and the load-carrying of the support constructions such as pipe support increases, to propositions such as the intensity of Ship Structure Requirements at the higher level cause the cost of top technical module and hull to be substantially increased, and reduce the economy of project.
The content of the invention
To overcome, existing floating liquefaction Technology of Natural Gas security is low, controllability is poor, high energy consumption, less economical lacks Point, the present invention propose a kind of natural gas liquefaction system, can realize the lighter hydrocarbons of stability and high efficiency under the conditions of different waters, different makings Separation and liquefied natural gas (LNG) production.
To achieve the above object, the technical solution adopted by the present invention is：
It is a kind of to be suitable for marine natural gas liquefaction system, it is characterized in that pre- including lighter hydrocarbons separator, mix refrigerant SAPMAC method, the main cryogenic heat exchanger of precooling, mix refrigerant deep cooling Xun Huan, the main cryogenic heat exchanger of No.1 deep cooling are low with No. two deep cooling masters Warm heat exchanger, wherein：
The lighter hydrocarbons separator includes domethanizing column, the tower overhead gas of the domethanizing column successively with the main low temperature of the precooling Heat exchanger, the main cryogenic heat exchanger of No.1 deep cooling and the main cryogenic heat exchanger of No. two deep coolings form heat exchange contact, then pass through main throttling Into LNG flash tanks after valve, the LNG and BOG that LNG flash tanks can be isolated；
The mix refrigerant pre-cooling cycle cryogenic heat exchanger main with the precooling forms heat exchange and contacts；
The mix refrigerant deep cooling cycles cryogenic heat exchanger main with the No.1 deep cooling and No. two main low temperature of deep cooling change Hot device is respectively formed heat exchange contact.
Described is suitable for marine natural gas liquefaction system, wherein：The mix refrigerant pre-cooling cycle is included successively Cycle connection precooling surge tank, pre- cold compressor, precooling water cooler and precooled throttling valve, the precooling water cooler with it is described Pipeline between precooled throttling valve cryogenic heat exchanger main with the precooling forms heat exchange and contacts, the precooled throttling valve with it is described pre- Also cryogenic heat exchanger formation heat exchange main with the precooling contacts pipeline between cold buffer tank.
Described is suitable for marine natural gas liquefaction system, wherein：The mix refrigerant deep cooling Xun Huan includes deep cooling Surge tank, deep freeze compressor, deep cooling water cooler, cryogenic separation tank, No.1 copious cooling throttle valve and No. two copious cooling throttle valves, the depth Cold buffer tank, deep freeze compressor, deep cooling water cooler, cryogenic separation tank are sequentially connected, and the deep cooling water cooler and the depth Pipeline cryogenic heat exchanger main with the precooling between cold knockout drum forms heat exchange and contacts, the liquid phase pipeline of the cryogenic separation tank Cryogenic heat exchanger main with the No.1 deep cooling forms heat exchange and contacts, then is connected with the No.1 copious cooling throttle valve, the deep cooling The gas phase pipeline of knockout drum cryogenic heat exchanger main with the No.1 deep cooling and the main cryogenic heat exchanger shape of No. two deep coolings successively It contacts into heat exchange, then is connected with No. two copious cooling throttle valves, the downstream pipe of No. two copious cooling throttle valves and No. two depths Cold main cryogenic heat exchanger forms heat exchange contact and then merges with the downstream pipe of the No.1 copious cooling throttle valve, after merging After return line cryogenic heat exchanger formation heat exchange main with the No.1 deep cooling contacts, the deep cooling surge tank is back to.
Described is suitable for marine natural gas liquefaction system, wherein：The mix refrigerant pre-cooling cycle uses pre- Cold mixing refrigerant contains ethane to the lighter hydrocarbons of pentane, does not contain the component of propane and carbon more than six；The mix refrigerant Deep cooling recycle deep cooling mix refrigerant in the lighter hydrocarbons containing nitrogen, methane to pentane, do not contain propane and carbon six with On component.
Described is suitable for marine natural gas liquefaction system, wherein：The lighter hydrocarbons separator includes one section of ice chest, two Section ice chest, cryogenic separation tank and expansion compressor, the air inlet all the way of one section of ice chest enter for unstripped gas, and one section cold The gas outlet all the way of case connects with the cryogenic separation tank, gaseous phase outlet and the expansion compressor of the cryogenic separation tank Expanding end is connected, then converges the rear entrance with the domethanizing column with the liquid-phase outlet of the cryogenic separation tank and be connected；It is described low All the way air inlet of the gaseous phase outlet of warm knockout drum also with two sections of ice chests connects, the gas outlet all the way of two sections of ice chests It is connected to the domethanizing column；The tower top of the domethanizing column is connected to the another way air inlet of two sections of ice chests, and described two Another way air inlet of the another way gas outlet of section ice chest then with one section of ice chest is connected, the another way of one section of ice chest Gas outlet is connected to the compression end of the expansion compressor, then cryogenic heat exchanger main with the precooling, No.1 deep cooling master are low successively Warm heat exchanger and the main cryogenic heat exchanger of No. two deep coolings form heat exchange contact.
Described is suitable for marine natural gas liquefaction system, wherein：The lighter hydrocarbons separator, which further includes, to be sequentially connected Dethanizer, depropanizing tower and debutanizing tower, the bottom of towe gas of the domethanizing column successively with the dethanizer, depropanizing tower Connect with debutanizing tower, the overhead product re-injection of the depropanizing tower enters unstripped gas.
The present invention is based on the particularity of sea effect, it is proposed that a kind of to be suitable for marine natural gas liquefaction system, optimization Mix refrigerant pre-cooling cycle, mix refrigerant deep cooling cycle, the technological parameter of lighter hydrocarbons knockout tower；Precooling mix refrigerant and Deep cooling mix refrigerant does not include propane, improves security；Reduce the energy expenditure of liquefaction system, for different gas Matter condition and marine environment, liquefied fraction reach 96%, compared with the prior art propane pre-cooling dinitrogen expansion natural gas liquefaction system, Than lower power consumption about 10%.
Description of the drawings
Fig. 1 is the structure principle chart provided by the invention for being suitable for marine natural gas liquefaction system.
Reference sign：1 lighter hydrocarbons separator, 11 domethanizing columns, 12 dethanizers, 13 depropanizing towers, 14 debutanizations Tower, 15 one section of domethanizing column ice chests, 16 two sections of domethanizing column ice chests, 17 cryogenic separation tanks, 18 expansion compressors, 2 hybrid refrigerations Agent pre-cooling cycle, 21 precooling surge tanks, 22 pre- cold compressors, 23 precooling water coolers, 3 mix refrigerant deep coolings Xun Huan, 31 deep coolings Surge tank, 32 deep freeze compressors, 33 deep cooling water coolers, 34 cryogenic separation tanks, 4 primary throttle valves, 5 precooled throttling valves, 6 No.1 deep coolings Throttle valve, 7 No. two copious cooling throttle valves, 8-LNG flash tanks, the main cryogenic heat exchanger of 91 precoolings, the 92 main cryogenic heat exchangers of No.1 deep cooling, 93 No. two main cryogenic heat exchangers of deep cooling.
Specific embodiment
As shown in Figure 1, the present invention provides a kind of natural gas liquefaction system for being suitable for sea, including lighter hydrocarbons separator 1st, mix refrigerant pre-cooling cycle 2, the main cryogenic heat exchanger 91 of precooling, mix refrigerant deep cooling Xun Huan 3, the main low temperature of No.1 deep cooling change Hot device 92 and the main cryogenic heat exchanger 93 of No. two deep coolings, wherein：
The lighter hydrocarbons separator 1 mainly includes sequentially connected domethanizing column 11, dethanizer 12,13 and of depropanizing tower Debutanizing tower 14, can sequentially remove methane, ethane, propane and butane in natural gas, and the tower top of the dethanizer 12 connects Ethane storage tank is connect, the tower top and bottom of towe of the debutanizing tower 14 connect butane storage tank and condensation oil tank respectively, and the present invention is not set Propane storage is put, the propane molar fraction about 96% of the overhead product of depropanizing tower 13, overhead product re-injection enters unstripped gas.It is de- 11 required cold of methane tower comes from one section of ice chest 15 of domethanizing column, two sections of ice chests 16 of domethanizing column, cryogenic separation tank 17 With expansion compressor 18, natural gas liquefaction system is not related to, therefore the technology flow of the invention is simple, equipment arrangement is tight It gathers, convenient for into sled, and it is big to the variation adaptability of unstripped gas composition.
Wherein, the lighter hydrocarbons separator 1 further includes one section of ice chest, 15, two sections of ice chests 16, cryogenic separation tank 17 and swollen Swollen compressor 18, the air inlet all the way of one section of ice chest 15 enter for unstripped gas, the gas outlet all the way of one section of ice chest 16 with The cryogenic separation tank 17 connects, the expanding end phase of the gaseous phase outlet of the cryogenic separation tank 17 and the expansion compressor 18 Even, the liquid-phase outlet after being cooled down by expansion with the cryogenic separation tank 17 converges subsequently into the domethanizing column 11；It is described All the way air inlet of the gaseous phase outlet of cryogenic separation tank 17 also with two sections of ice chests 16 connects, and two sections of ice chests 16 are all the way Gas outlet is also connected to the domethanizing column 11；The tower top of the domethanizing column 11 is connected to the another way of two sections of ice chests 16 Air inlet, the another way air inlet of the another way gas outlets of two sections of ice chests 16 then with one section of ice chest 15 are connected, institute The another way gas outlet for stating one section of ice chest 15 is connected to the compression end of the expansion compressor 18 and is pressurized, after supercharging successively with The main cryogenic heat exchanger 91 of the precooling, the main cryogenic heat exchanger 92 of No.1 deep cooling and the main formation of cryogenic heat exchanger 93 of No. two deep coolings are changed After thermo-contact, by the way that, into LNG flash tanks 8, the LNG that LNG flash tanks 8 are isolated stores to wait outer after primary throttle valve 4 Fortune, the BOG isolated enter fuel gas system；The bottom product of the domethanizing column 11 sequentially enters 13 deethanization of depropanizing tower Tower 12, depropanizing tower 13 and debutanizing tower 14, just repeat no more.So set, 11 required cold of domethanizing column can be made Come from lighter hydrocarbons separator 1 itself.
The mix refrigerant pre-cooling cycle 2 includes cycling the precooling surge tank 21 of connection, pre- cold compressor 22, pre- successively Cold water cooler 23 and precooled throttling valve 5, pipeline between the precooling water cooler 23 and the precooled throttling valve 5 with it is described pre- Cold main cryogenic heat exchanger 91 forms heat exchange contact, the pipeline between the precooled throttling valve 5 and the precooling surge tank 21 also with The main cryogenic heat exchanger 91 of precooling forms heat exchange contact.
The mix refrigerant deep cooling cycle 3 includes deep cooling surge tank 31, deep freeze compressor 32, deep cooling water cooler 33, depth Cold knockout drum 34, No.1 copious cooling throttle valve 6 and No. two copious cooling throttle valves 7, the deep cooling surge tank 31, deep freeze compressor 32, depth Cold water cooler 33, cryogenic separation tank 34 are sequentially connected, and between the deep cooling water cooler 33 and the cryogenic separation tank 34 Pipeline cryogenic heat exchanger 91 main with the precooling forms heat exchange and contacts, liquid phase pipeline and the No.1 of the cryogenic separation tank 34 The main cryogenic heat exchanger 92 of deep cooling forms heat exchange contact, then is connected with the No.1 copious cooling throttle valve 6, the cryogenic separation tank 34 Gas phase pipeline cryogenic heat exchanger 92 main with the No.1 deep cooling and the main cryogenic heat exchanger 93 of No. two deep coolings are formed successively Heat exchange contact, then be connected with No. two copious cooling throttle valves 7, the downstream pipe of No. two copious cooling throttle valves 7 and No. two depths Cold main cryogenic heat exchanger 93 forms heat exchange contact and then merges with the downstream pipe of the No.1 copious cooling throttle valve 6, after merging Main with the No.1 deep cooling cryogenic heat exchanger 92 of return line formed after heat exchange contacts, be back to the deep cooling surge tank 31。
Mix refrigerant pre-cooling cycle 2 is different from refrigerant component used in mix refrigerant deep cooling Xun Huan 3, and precooling mixes It closes the lighter hydrocarbons that refrigerant contains ethane to pentane to form, does not contain the component of propane and carbon more than six；Deep cooling mix refrigerant In the lighter hydrocarbons composition containing nitrogen, methane to pentane, do not contain the component of propane and carbon more than six.
Below with a preferred embodiment, the course of work that the present invention is discussed in detail is as follows：
After removing the impurity such as solid particle, water, sour gas, mercury, benzene, unstripped gas enters one section of ice chest 15, and cooling is laggard Enter cryogenic separation tank 17, the expansion cooling of the expanding end of the expanded compressor 18 of the partial gas phase unstripped gas after separation, with liquid phase Unstripped gas enters de- into domethanizing column 11, another part phase feed gas after converging after two sections of ice chests 16 of domethanizing column cool down Methane tower 11, the overhead product methane molar fraction about 96% of domethanizing column 11, overhead product through one section of ice chest 15 of domethanizing column, Two sections of ice chests 16 of domethanizing column heat up, and are pressurized subsequently into the compression end of expansion compressor 18, and precooling master is flowed into after supercharging Cryogenic heat exchanger 91, the bottom product of domethanizing column 11 enter dethanizer 12；The ethane of the overhead product of dethanizer 12 rubs That fraction about 96%, bottom product enters depropanizing tower 13；The propane molar fraction about 96% of the overhead product of depropanizing tower 13, Overhead product re-injection enters unstripped gas, and bottom product enters debutanizing tower 14；The butane mole point of 14 overhead product of debutanizing tower Number about 92%, bottom product condensate are stored as byproduct and transported outward.
Unstripped gas after domethanizing column 11 into the main cryogenic heat exchanger 91 of precooling, pre-cooled mix refrigerant be cooled to about- 45 DEG C~-52 DEG C, the main cryogenic heat exchanger 92 of No.1 deep cooling and the main cryogenic heat exchanger 93 of No. two deep coolings are then flowed into successively, through deep cooling Mix refrigerant is cooled to about -148 DEG C~-156 DEG C, and LNG flash tanks are flowed into after being cooled to -160 DEG C by the throttling of primary throttle valve 4 8, the LNG storages isolated wait outward transport, and BOG enters fuel gas system.
The pre-cooled compressor 22 of precooling mix refrigerant is compressed to about 3.8MPa~4.3MPa, through precooling water cooler after compression 23 coolings, the low-temperature receiver of precooling water cooler 23 use seawater；Enter the main low-temperature heat exchange of precooling after precooling mix refrigerant compression water cooling Device 91, the pre-cooled throttling of throttle valve 5 cooling, is then back to the main cryogenic heat exchanger 91 of precooling, to cool down unstripped gas, deep cooling mixing The precooling mix refrigerant of refrigerant and high temperature；Fully after heat exchange, precooling mix refrigerant enters precooling surge tank 21, is formed mixed Close refrigerant pre-cooling cycle.
Deep cooling mix refrigerant is compressed to about 3.9MPa~4.4MPa through deep freeze compressor 32, through deep cooling water cooler after compression 33 coolings, the low-temperature receiver of deep cooling water cooler 33 use seawater；Enter the main low temperature of No.1 precooling after deep cooling mix refrigerant compression water cooling Heat exchanger 91 enters cryogenic separation tank 34 after precooling；Liquid phase deep cooling mix refrigerant after gas-liquid separation enters No. two deep cooling masters Cryogenic heat exchanger throttles through No.1 copious cooling throttle valve 6 and cools down；Gas phase deep cooling mix refrigerant after gas-liquid separation sequentially enters one Number 92, No. two main cryogenic heat exchangers 93 of deep cooling of the main cryogenic heat exchanger of deep cooling through No. two throttling coolings of copious cooling throttle valves 7, then return Cooling unstripped gas and gas phase deep cooling mix refrigerant are returned, is mixed after flowing out the main cryogenic heat exchanger 93 of deep cooling with the liquid phase deep cooling after throttling It closes refrigerant and returns to the main cryogenic heat exchanger 92 of deep cooling together, to cool down unstripped gas and deep cooling mix refrigerant；Fully after heat exchange, Deep cooling mix refrigerant enters deep cooling surge tank 31, forms mix refrigerant deep cooling Xun Huan.
Stable operation under the conditions of at sea being rocked for guarantee liquefaction system, it is as follows to key equipment, technical module requirement： The main cryogenic heat exchanger of precooling, using uniform fluid distribution component, optimizes internal heat structure, ensures heat exchange with the main cryogenic heat exchanger of deep cooling The stability and high efficiency of process；Gas-liquid separator ensures separating effect by the setting of internals；It is set according to technological process, key The factors such as standby gauge size, deck space rationally carry out modular division, shorten construction period.
Described above to be merely exemplary for the purpose of the present invention, and not restrictive, those of ordinary skill in the art understand, In the case where not departing from the spirit and scope that claim is limited, can many modifications may be made, variation or equivalent, but will all fall Enter within protection scope of the present invention.

Claims (6)

1. a kind of be suitable for marine natural gas liquefaction system, it is characterized in that including lighter hydrocarbons separator, mix refrigerant precooling Xun Huan, the main cryogenic heat exchanger of precooling, mix refrigerant deep cooling Xun Huan, the main cryogenic heat exchanger of No.1 deep cooling and No. two main low temperature of deep cooling Heat exchanger, wherein：
The lighter hydrocarbons separator includes domethanizing column, the tower overhead gas of the domethanizing column successively with the main low-temperature heat exchange of the precooling Device, the main cryogenic heat exchanger of No.1 deep cooling and the main cryogenic heat exchanger of No. two deep coolings form heat exchange contact, then by primary throttle valve it Afterwards into LNG flash tanks, the LNG and BOG that LNG flash tanks can be isolated；
The mix refrigerant pre-cooling cycle cryogenic heat exchanger main with the precooling forms heat exchange and contacts；
The mix refrigerant deep cooling Xun Huan and the main cryogenic heat exchanger of the No.1 deep cooling and No. two main cryogenic heat exchangers of deep cooling It is respectively formed heat exchange contact.
2. according to claim 1 be suitable for marine natural gas liquefaction system, it is characterised in that：The mix refrigerant Pre-cooling cycle includes the precooling surge tank, pre- cold compressor, precooling water cooler and the precooled throttling valve that cycle connection successively, described Pipeline cryogenic heat exchanger main with the precooling between precooling water cooler and the precooled throttling valve forms heat exchange and contacts, described pre- Also cryogenic heat exchanger formation heat exchange main with the precooling contacts pipeline between cold throttle valve and the precooling surge tank.
3. according to claim 1 or 2 be suitable for marine natural gas liquefaction system, it is characterised in that：The mixing system Cryogen deep cooling cycle include deep cooling surge tank, deep freeze compressor, deep cooling water cooler, cryogenic separation tank, No.1 copious cooling throttle valve and No. two copious cooling throttle valves, the deep cooling surge tank, deep freeze compressor, deep cooling water cooler, cryogenic separation tank are sequentially connected, Er Qiesuo The cryogenic heat exchanger formation heat exchange main with the precooling of the pipeline between deep cooling water cooler and the cryogenic separation tank is stated to contact, it is described Main with the No.1 deep cooling cryogenic heat exchanger of the liquid phase pipeline of cryogenic separation tank forms heat exchange and contacts, then with the No.1 deep cooling section Stream valve is connected, the gas phase pipeline of cryogenic separation tank cryogenic heat exchanger main with the No.1 deep cooling and No. two described successively The main cryogenic heat exchanger of deep cooling forms heat exchange contact, then is connected with No. two copious cooling throttle valves, under No. two copious cooling throttle valves The cryogenic heat exchanger formation heat exchange main with No. two deep coolings of play pipe road contacts and then the downstream with the No.1 copious cooling throttle valve Pipeline merges, and after the cryogenic heat exchanger formation heat exchange main with the No.1 deep cooling of the return line after merging contacts, is back to institute State deep cooling surge tank.
4. according to claim 1 be suitable for marine natural gas liquefaction system, it is characterised in that：The mix refrigerant The precooling mix refrigerant that pre-cooling cycle uses contains ethane to the lighter hydrocarbons of pentane, does not contain the group of propane and carbon more than six Part；Lighter hydrocarbons containing nitrogen, methane to pentane in the deep cooling mix refrigerant that the mix refrigerant deep cooling recycles, are free of There is the component of propane and carbon more than six.
5. according to claim 1 be suitable for marine natural gas liquefaction system, it is characterised in that：The lighter hydrocarbons separation dress Put including one section of ice chest, two sections of ice chests, cryogenic separation tank and expansion compressor, the air inlet all the way of one section of ice chest for Unstripped gas enters, and the gas outlet all the way of one section of ice chest connects with the cryogenic separation tank, the gaseous phase outlet of the cryogenic separation tank It is connected with the expanding end of the expansion compressor, then converges the rear and domethanizing column with the liquid-phase outlet of the cryogenic separation tank Entrance be connected；All the way air inlet of the gaseous phase outlet of the cryogenic separation tank also with two sections of ice chests connects, described two sections The gas outlet all the way of ice chest is also connected to the domethanizing column；The tower top of the domethanizing column is connected to the another of two sections of ice chests Air inlet all the way, the another way air inlet of the another way gas outlets of two sections of ice chests then with one section of ice chest are connected, institute The another way gas outlet for stating one section of ice chest is connected to the compression end of the expansion compressor, then is changed successively with the main low temperature of the precooling Hot device, the main cryogenic heat exchanger of No.1 deep cooling and the main cryogenic heat exchanger of No. two deep coolings form heat exchange contact.
6. it is suitable for marine natural gas liquefaction system according to claim 1 or 5, it is characterised in that：The lighter hydrocarbons point Further include sequentially connected dethanizer, depropanizing tower and debutanizing tower from device, the bottom of towe gas of the domethanizing column successively with The dethanizer, depropanizing tower and debutanizing tower connect, and the overhead product re-injection of the depropanizing tower enters unstripped gas.
CN201810014919.4A 2018-01-08 2018-01-08 Natural gas liquefaction system suitable for sea Active CN108106325B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810014919.4A CN108106325B (en) 2018-01-08 2018-01-08 Natural gas liquefaction system suitable for sea

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810014919.4A CN108106325B (en) 2018-01-08 2018-01-08 Natural gas liquefaction system suitable for sea

Publications (2)

Publication Number Publication Date
CN108106325A true CN108106325A (en) 2018-06-01
CN108106325B CN108106325B (en) 2024-01-19

Family

ID=62219833

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810014919.4A Active CN108106325B (en) 2018-01-08 2018-01-08 Natural gas liquefaction system suitable for sea

Country Status (1)

Country Link
CN (1) CN108106325B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108759302A (en) * 2018-06-04 2018-11-06 中海石油气电集团有限责任公司 A kind of high-pressure natural gas liquefaction system and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121917A (en) * 1975-09-09 1978-10-24 Union Carbide Corporation Ethylene production with utilization of LNG refrigeration
CN101787314A (en) * 2010-04-01 2010-07-28 中国石油大学(华东) Process for compact natural gas liquefying and floating production
CN104315801A (en) * 2014-10-15 2015-01-28 中国海洋石油总公司 Mixed refrigerant-expansive refrigeration-circulated natural gas liquefying method
CN204739842U (en) * 2015-06-16 2015-11-04 中国海洋石油总公司 Preliminary treatment of FLNG oil gas and liquefying plant
CN105486034A (en) * 2016-01-05 2016-04-13 中国寰球工程公司 Natural gas liquefaction and light dydrocarbon separation integrated process system and technology
CN207881346U (en) * 2018-01-08 2018-09-18 中国寰球工程有限公司 Suitable for marine natural gas liquefaction system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121917A (en) * 1975-09-09 1978-10-24 Union Carbide Corporation Ethylene production with utilization of LNG refrigeration
CN101787314A (en) * 2010-04-01 2010-07-28 中国石油大学(华东) Process for compact natural gas liquefying and floating production
CN104315801A (en) * 2014-10-15 2015-01-28 中国海洋石油总公司 Mixed refrigerant-expansive refrigeration-circulated natural gas liquefying method
CN204739842U (en) * 2015-06-16 2015-11-04 中国海洋石油总公司 Preliminary treatment of FLNG oil gas and liquefying plant
CN105486034A (en) * 2016-01-05 2016-04-13 中国寰球工程公司 Natural gas liquefaction and light dydrocarbon separation integrated process system and technology
CN207881346U (en) * 2018-01-08 2018-09-18 中国寰球工程有限公司 Suitable for marine natural gas liquefaction system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王清: "FLNG混合冷剂液化工艺优化设计及海上适应性研究" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108759302A (en) * 2018-06-04 2018-11-06 中海石油气电集团有限责任公司 A kind of high-pressure natural gas liquefaction system and method

Also Published As

Publication number Publication date
CN108106325B (en) 2024-01-19

Similar Documents

Publication Publication Date Title
RU2141084C1 (en) Liquefaction plant
CN103865601B (en) Heavy hydrocarbon recovery method of propane precooling and deethanizer top reflux
CN101787314B (en) Process for compact natural gas liquefying and floating production
KR102516628B1 (en) large-scale coastal liquefaction
US20160231050A1 (en) Expandable lng processing plant
Kirillov Analysis of modern natural gas liquefaction technologies
CN106440656B (en) Carbon dioxide precooling two-stage nitrogen expansion natural gas liquefaction system
CN102093921A (en) Offshore natural gas liquefying method and device
CN113108549B (en) Offshore natural gas liquefaction system integrating nitrogen expansion cycle with mixed refrigerant
CN106441964B (en) A kind of test platform of floating natural gas liquefaction system
CN204739842U (en) Preliminary treatment of FLNG oil gas and liquefying plant
US11009291B2 (en) Method for air cooled, large scale, floating LNG production with liquefaction gas as only refrigerant
CN207881346U (en) Suitable for marine natural gas liquefaction system
CN103868322B (en) A kind of pre-cooling type heavy hydrocarbon recovery system for offshore natural gas exploitation and technique
CN105737516A (en) System and method for liquefying natural gas by mixed refrigerant precooling and nitrogen expansion
CN108106325A (en) Suitable for marine natural gas liquefaction system
CN206222820U (en) A kind of natural gas liquefaction system of carbon dioxide precooling double-stage nitrogen expansion
CN203744654U (en) Precooling heavy hydrocarbon recovery system for offshore natural gas extraction
CN203758166U (en) Natural-gas expanding heavy hydrocarbon recovery system suitable for sea
CN103868323B (en) A kind of natural gas expansion heavy hydrocarbon recovery system and technique being applicable to sea
CN208124717U (en) Ethane cryogen stocking system suitable for FLNG
WO2016050840A1 (en) Method and plant for coastal production of liquefied natural gas
CN206546059U (en) A kind of FLNG swell refrigerations natural gas liquefaction process device
CN204612360U (en) A kind of heavy hydrocarbon recovery system for LNG-FPSO
CN204678803U (en) A kind of propane pre-cooling heavy hydrocarbon retracting device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant