CN213657266U - Skid-mounted device for preparing liquid hydrogen by LNG - Google Patents

Skid-mounted device for preparing liquid hydrogen by LNG Download PDF

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Publication number
CN213657266U
CN213657266U CN202022694962.5U CN202022694962U CN213657266U CN 213657266 U CN213657266 U CN 213657266U CN 202022694962 U CN202022694962 U CN 202022694962U CN 213657266 U CN213657266 U CN 213657266U
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China
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hydrogen
lng
natural gas
communicated
lithium bromide
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CN202022694962.5U
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Chinese (zh)
Inventor
王秀林
侯建国
穆祥宇
宋鹏飞
赵思思
张瑜
姚辉超
侯海龙
隋依言
尹全森
王斯
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China National Offshore Oil Corp CNOOC
CNOOC Gas and Power Group Co Ltd
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China National Offshore Oil Corp CNOOC
CNOOC Gas and Power Group Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0005—Light or noble gases
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
    • C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
    • C01B3/506—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification at low temperatures
    • 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
    • F25J1/0005—Light or noble gases
    • F25J1/001—Hydrogen
    • 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
    • F25J1/005—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 expansion of a gaseous refrigerant stream 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
    • F25J1/003—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
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0211—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle
    • F25J1/0212—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle as a single flow MCR cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • 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
    • F25J1/0221—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 the cold stored in an external cryogenic component in an open refrigeration 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
    • F25J1/0225—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 other external refrigeration means not provided before, e.g. heat driven absorption chillers
    • F25J1/0227—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 other external refrigeration means not provided before, e.g. heat driven absorption chillers within a refrigeration 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
    • F25J1/0243—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
    • F25J1/0265—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams comprising cores associated exclusively with the cooling of a refrigerant stream, e.g. for auto-refrigeration or economizer
    • F25J1/0268—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams comprising cores associated exclusively with the cooling of a refrigerant stream, e.g. for auto-refrigeration or economizer using a dedicated refrigeration means
    • 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.
    • F25J1/0292—Refrigerant compression by cold or cryogenic suction of the refrigerant 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/62—Liquefied natural gas [LNG]; Natural gas liquids [NGL]; Liquefied petroleum gas [LPG]
    • 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
    • F25J2215/10—Hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30—Compression of the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • F25J2270/904—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by liquid or gaseous cryogen in an open 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
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • F25J2270/906—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by heat driven absorption chillers

Abstract

The utility model discloses a skid-mounted device of LNG preparation liquid hydrogen. The skid-mounted device comprises an LNG temperature rising unit, a natural gas conversion unit and a hydrogen liquefaction unit; the LNG temperature rising unit comprises an LNG heat exchanger and an LNG vaporizer which are sequentially connected; the natural gas conversion unit comprises a natural gas converter, a natural gas converter and a pressure swing absorber which are connected in sequence; the LNG vaporizer is communicated with the natural gas converter; the hydrogen liquefying unit comprises a lithium bromide cooler and a hydrogen liquefier; a hydrogen inlet of the lithium bromide cooler is communicated with a hydrogen-rich gas outlet of the pressure swing absorber, a hydrogen outlet of the lithium bromide cooler is communicated with a hydrogen inlet of the LNG vaporizer, a hydrogen outlet of the LNG vaporizer is communicated with a hydrogen liquefier, and an outlet of the hydrogen liquefier obtains liquid hydrogen; and both the LNG heat exchanger and the hydrogen liquefier exchange heat with a mixture of He and Ar. The utility model discloses directly utilize LNG gasification technology and hydrogen liquefaction technology energy each other, the liquid hydrogen of preparation can conveniently be transported and utilize, improves the transportation consumption and the hydrogen economic nature of hydrogen.

Description

Skid-mounted device for preparing liquid hydrogen by LNG
Technical Field
The utility model relates to a skid-mounted device of LNG preparation liquid hydrogen.
Background
Hydrogen energy is a recognized clean energy source, is considered as the most potential fossil fuel substitute in the future due to the advantages of high energy density, zero carbon emission and the like, is considered as an ultimate scheme in the field of mobile energy represented by hydrogen fuel cell automobiles, and green hydrogen can also be used as a hydrogen source in the hydrogenation process of fossil resources to realize carbon emission reduction. The hydrogen energy as a new secondary energy can play an important role in low-carbon emission reduction and future green energy systems. The international hydrogen energy commission predicts that in 2050, hydrogen energy will account for 18% of energy consumption. By 2050 years, the hydrogen energy is expected to reach more than 10% in the energy structure of China.
Hydrogen energy development planning is made in the United states, Japan, Canada, European Union and the like, at present, governments at all levels in China also pay high attention to the development of the hydrogen energy industry, and a top-down policy support system is formed. At present, the key factor influencing the development of the hydrogen energy industry is the price of hydrogen, and the price of hydrogen determines the economy of hydrogen utilization, and further determines the economy and feasibility of the whole industry. The hydrogen energy industry comprises three main links of hydrogen production, hydrogen storage and transportation and hydrogen utilization, wherein the key for realizing the development of the hydrogen energy industry is the high-efficiency hydrogen production technology and reducing the hydrogen operation cost.
Disclosure of Invention
Aiming at the problems of high energy consumption and liquid hydrogen manufacturing cost of hydrogen liquefaction, the utility model provides a skid-mounted device for preparing liquefied hydrogen by using LNG cold energy, and the concentration of the obtained hydrogen is more than 99.9%; the utility model discloses with LNG gasification equipment and hydrogen liquefaction device energy inter utilization, simple process, degree of automation are high, convenient operation, can solve the problem of hydrogen liquefaction energy consumption well.
Specifically, the utility model provides a novel skid-mounted device for preparing liquid hydrogen by LNG, which comprises an LNG temperature rising unit, a natural gas conversion unit and a hydrogen liquefaction unit;
the LNG temperature rising unit comprises an LNG heat exchanger and an LNG vaporizer which are sequentially connected;
the natural gas conversion unit comprises a natural gas converter, a natural gas converter and a pressure swing absorber which are connected in sequence; the LNG vaporizer is communicated with the natural gas converter;
the hydrogen liquefying unit comprises a lithium bromide cooler and a hydrogen liquefier; a hydrogen inlet of the lithium bromide cooler is communicated with a hydrogen-rich gas outlet of the pressure swing adsorber, a hydrogen outlet of the lithium bromide cooler is communicated with a hydrogen inlet of the LNG vaporizer, a hydrogen outlet of the LNG vaporizer is communicated with the hydrogen liquefier, and an outlet of the hydrogen liquefier obtains liquid hydrogen;
the LNG heat exchanger and the hydrogen liquefier exchange heat with a mixture of He and Ar, and the concentration range of Ne in the mixture can be 5% -90%;
the cooling temperature of the mixture may be-120 to-157 ℃.
In the LNG heating unit, an inlet end of the LNG heat exchanger is connected with an LNG booster pump to boost low-temperature LNG to 0.3-10 MPaG;
the temperature of the LNG can be raised to-100-0 ℃ through the temperature raising unit, so that the hydrogen is reduced to-60-150 ℃.
In the natural gas conversion unit, the inlet end of the natural gas converter is connected with a combustion furnace, and natural gas can be heated to 600-1000 ℃;
the concentration of hydrogen in the hydrogen-rich gas obtained by the natural gas conversion unit is more than 99.9%.
In the hydrogen liquefaction unit, a hydrogen inlet end of the lithium bromide cooler is sequentially connected with the cooler, the gas buffer tank and the compressor; the hydrogen-rich gas is pressurized to 0.5-5.0 MPAG by the compressor and then cooled to-20 ℃ by the lithium bromide cooler.
In a lithium bromide precooling working section, after the pressure of lithium bromide is increased to 0.5-3 MPAG, the cooled lithium bromide is throttled and heat exchanged, and then the pressure is continuously increased for recycling.
The utility model discloses the device is direct to utilize LNG gasification technology and hydrogen liquefaction technology energy each other, and the liquid hydrogen of preparation can conveniently be transported and utilize, improves the transportation consumption and the hydrogen economic nature of hydrogen, the utility model discloses the degree of automation of device is high, and the equipment that adopts is reliable, improves the cost of preparation and the liquefaction cost of hydrogen, and economic benefits is showing.
Drawings
Fig. 1 is the structure schematic diagram of the device for preparing liquid hydrogen by LNG of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.
As shown in fig. 1, the structure of the apparatus of the present invention is explained according to the process of preparing liquid hydrogen:
1. LNG (8.0MPaG) pressurized by an LNG booster pump P-100 in the LNG storage tank V100 enters an LNG heat exchanger LNG-103 to exchange heat with (He + Ar) and then has the temperature of-130 ℃ (material flow 2-4-5).
2. The natural gas after heat exchange by the LNG heat exchanger LNG-103 enters an LNG vaporizer LNG-100 to exchange heat with hydrogen, and the temperature of the natural gas after heat exchange is 5 ℃ (material flow 5-6).
3. The natural gas after heat exchange is heated to 800 ℃ by a combustion furnace E-101 and then enters a natural gas converter GBR-100 (material flow 6-7-9).
4. After natural gas is respectively concentrated by a converter GBR-100, a converter GBR-101 and a pressure swing absorber X-100, preparing a hydrogen-rich gas mixture (material flow 9-10-12-14) with the hydrogen concentration of more than 99.9 percent; purge gas (stream 15) discharge system.
5. The hydrogen-rich gas mixture is cooled to 5 ℃ by a cooler E-102, buffered by a gas buffer tank V-104, pressurized by a compressor K-100 (4.0MPaG), and cooled by a lithium bromide cooler LNG-101 at (-10 ℃) (stream 14-16-17-10-20).
6. After hydrogen at the outlet of the lithium bromide cooler LNG-101 enters an LNG vaporizer LNG-100 to be cooled by heat exchange (the hydrogen temperature is minus 160 ℃), the hydrogen enters a hydrogen liquefier LNG-102 to be cooled to minus 250 ℃ (material flow is 20-8-21) by heat exchange with a (He + Ar) mixture (the concentration of Ne is 50%).
7. The hydrogen cooled by the hydrogen liquefier (pressure 3.65MPaG, temperature-257 ℃) is throttled by a throttle valve to prepare liquid hydrogen.
8. In a lithium bromide precooling device, after lithium bromide is pressurized to 0.8MPAG by a compressor K-101, the lithium bromide is cooled and throttled by a lithium bromide heat exchanger E-103, and then continuously pressurized for recycling (27-3-29-27) after heat exchange is carried out by a lithium bromide cooler LNG-101.

Claims (4)

1. The utility model provides a sled dress device of LNG preparation liquid hydrogen which characterized in that: the device comprises an LNG temperature rising unit, a natural gas conversion unit and a hydrogen liquefaction unit;
the LNG temperature rising unit comprises an LNG heat exchanger and an LNG vaporizer which are sequentially connected;
the natural gas conversion unit comprises a natural gas converter, a natural gas converter and a pressure swing absorber which are connected in sequence; the LNG vaporizer is communicated with the natural gas converter;
the hydrogen liquefying unit comprises a lithium bromide cooler and a hydrogen liquefier; a hydrogen inlet of the lithium bromide cooler is communicated with a hydrogen-rich gas outlet of the pressure swing adsorber, a hydrogen outlet of the lithium bromide cooler is communicated with a hydrogen inlet of the LNG vaporizer, a hydrogen outlet of the LNG vaporizer is communicated with the hydrogen liquefier, and an outlet of the hydrogen liquefier obtains liquid hydrogen;
and the LNG heat exchanger and the hydrogen liquefier exchange heat with a mixture of He and Ar.
2. The skid device of claim 1, wherein: in the LNG warming unit, the inlet end of the LNG heat exchanger is connected with an LNG booster pump.
3. The skid device of claim 1 or 2, wherein: in the natural gas conversion unit, the inlet end of the natural gas converter is connected with a combustion furnace.
4. The skid device of claim 1 or 2, wherein: in the hydrogen liquefaction unit, the hydrogen inlet end of the lithium bromide cooler is sequentially connected with the cooler, the gas buffer tank and the compressor.
CN202022694962.5U 2020-09-16 2020-11-19 Skid-mounted device for preparing liquid hydrogen by LNG Active CN213657266U (en)

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CN2020109717000 2020-09-16
CN202010971700 2020-09-16

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CN107940895A (en) * 2017-11-30 2018-04-20 中国科学院理化技术研究所 Gas liquefaction system
CN208398488U (en) * 2018-05-28 2019-01-18 张家港富瑞氢能装备有限公司 Liquefaction of hydrogen pre-cooler
CN208361885U (en) * 2018-06-13 2019-01-11 北京安珂罗工程技术有限公司 A kind of system that liquid hydrogen is prepared by liquefied natural gas
CN210463761U (en) * 2019-09-23 2020-05-05 浙江海天气体有限公司 Throttling hydrogen liquefying device with precooling function
CN110657633B (en) * 2019-10-21 2022-02-22 北京中科富海低温科技有限公司 Hydrogen liquefaction system

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