CN106091574A - Gas liquefaction device with compression heat recovery function and liquefaction method thereof - Google Patents

Gas liquefaction device with compression heat recovery function and liquefaction method thereof Download PDF

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Publication number
CN106091574A
CN106091574A CN201610390586.6A CN201610390586A CN106091574A CN 106091574 A CN106091574 A CN 106091574A CN 201610390586 A CN201610390586 A CN 201610390586A CN 106091574 A CN106091574 A CN 106091574A
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water
gas
cooler
heat
temperature water
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CN201610390586.6A
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CN106091574B (en
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曹卫华
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Sichuan Shudao Equipment Technology Co ltd
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Chengdu Shenleng Liquefaction Plant Co ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes 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
    • F25J1/0201Processes 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 only internal refrigeration means, i.e. without external refrigeration
    • F25J1/0202Processes 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 only internal refrigeration means, i.e. without external refrigeration in a quasi-closed internal refrigeration loop
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0012Primary atmospheric gases, e.g. air
    • F25J1/0015Nitrogen
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0012Primary atmospheric gases, e.g. air
    • F25J1/0017Oxygen
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0012Primary atmospheric gases, e.g. air
    • F25J1/002Argon
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022Hydrocarbons, e.g. natural gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003Processes 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
    • F25J1/0047Processes 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
    • F25J1/0052Processes 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes 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
    • F25J1/0225Processes 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
    • F25J1/0227Processes 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes 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
    • F25J1/0228Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0235Heat exchange integration
    • F25J1/0242Waste heat recovery, e.g. from heat of compression
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes 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
    • F25J1/0243Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0259Modularity and arrangement of parts of the liquefaction unit and in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes 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
    • F25J1/0243Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0262Details of the cold heat exchange system
    • F25J1/0264Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams
    • F25J1/0265Arrangement 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
    • F25J1/0268Arrangement 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes 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
    • F25J1/0243Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes 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
    • F25J1/0243Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0296Removal of the heat of compression, e.g. within an inter- or afterstage-cooler against an ambient heat sink
    • F25J1/0297Removal of the heat of compression, e.g. within an inter- or afterstage-cooler against an ambient heat sink using an externally chilled fluid, e.g. chilled water
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2220/00Processes or apparatus involving steps for the removal of impurities
    • F25J2220/60Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
    • F25J2220/64Separating heavy hydrocarbons, e.g. NGL, LPG, C4+ hydrocarbons or heavy condensates in general
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/04Compressor cooling arrangement, e.g. inter- or after-stage cooling or condensate removal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30Compression of the feed stream
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00Refrigeration techniques used
    • F25J2270/90External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • F25J2270/906External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by heat driven absorption chillers

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (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 invention discloses a gas liquefaction device with compression heat recovery, which comprises a raw material gas treatment system, a refrigerant treatment system and a compression heat recovery system, and also discloses a liquefaction method of the gas liquefaction device with compression heat recovery. The invention has the beneficial effects that: the low-temperature water is prepared by recovering the compression heat, so that the energy consumption of the liquefaction device is greatly reduced; the low-temperature water tank can also be used for cold storage, low-temperature water or ice can be additionally prepared according to the electricity price difference, and the low-temperature water can be fed only at the peak or peak electricity price, so that the energy consumption of the liquefaction device is further reduced; the method has the advantages of simple operation, low energy consumption, accordance with the great trend of energy conservation and consumption reduction, and good social and economic benefits.

Description

The gas liquefaction equipment of a kind of band compression recuperation of heat and liquifying method thereof
Technical field
The present invention relates to the technical field of gas cryogenic liquefying, the gas liquefaction equipment of a kind of band compression recuperation of heat And liquifying method.
Background technology
The volume of cryogenic liquid product (liquid oxygen, liquid nitrogen, liquid argon, liquid hydrogen and LNG etc.) is little (such as 1m3Liquid oxygen be equivalent to 800Nm3Oxygen, such as 1m3Liquid hydrogen be equivalent to 788Nm3Hydrogen, 1m3LNG be equivalent to 600Nm3Natural gas), it is simple to long Extensively, liquid hydrogen, LNG etc. are longer as distance travelled during motor vehicle fuel simultaneously for distance transport, radiation areas.Therefore, produce liquid to produce The liquefying plant of product industrially has very important effect.
The heat of compression of conventional gas liquefying plant is taken away by recirculated water, then is made by circulating water cooling tower cooling Posterior circle With, the heat of compression wastes and needs to consume a large amount of recirculated water, and the energy consumption causing conventional gas liquefying plant is higher.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, it is provided that the gas liquefaction equipment of a kind of band compression recuperation of heat And liquifying method.
The purpose of the present invention is achieved through the following technical solutions: the gas liquefaction equipment of a kind of band compression recuperation of heat, it Including unstripped gas processing system, refrigerant processes system, heat of compression recovery system;
Described unstripped gas processing system includes feed gas compressor, unstripped gas normal-temperature water cooler, unstripped gas water at low temperature Cooler, raw material gas purifying unit and gas liquefaction heat exchanger, wherein, unstripped gas input channel is connected with feed gas compressor, Feed gas compressor connects with unstripped gas normal-temperature water cooler, and unstripped gas normal-temperature water cooler is with unstripped gas water at low temperature cooler even Logical, unstripped gas water at low temperature cooler connects with raw material gas purifying unit, and raw material gas purifying unit connects with gas liquefaction heat exchanger;
Described refrigerant processes system includes refrigerant compressor, cold-producing medium normal-temperature water cooler, cold-producing medium low temperature water-cooled But device and gas liquefaction heat exchanger, described refrigerant compressor connects with cold-producing medium normal-temperature water cooler, cold-producing medium room temperature water-cooled But device connects with cold-producing medium water at low temperature cooler, and cold-producing medium water at low temperature cooler connects with gas liquefaction heat exchanger, described gas Body liquefaction heat exchanger connects with refrigerant compressor;
Described heat of compression recovery system includes room temperature water pot, room temperature water pump, refrigeration unit and water cooler, and described is normal Being provided with a plurality of arm on the outlet pipe of warm water tank, wherein, the first arm is connected with room temperature water pump, the second arm and water cooler Connection, the 3rd arm connects with refrigeration unit, and described cold-producing medium normal-temperature water cooler goes out with unstripped gas normal-temperature water cooler Water pipe is all connected with refrigeration unit by same pipeline, and is provided with valve on this pipeline, described cold-producing medium low temperature water-cooled But device is all connected with refrigeration unit by same pipeline with the oral siphon of unstripped gas water at low temperature cooler, and at this pipeline and entering Being provided with valve on water pipe, described cold-producing medium normal-temperature water cooler all passes through with the oral siphon of unstripped gas normal-temperature water cooler Same pipeline connects with room temperature water pump, and is provided with valve on this oral siphon, the water outlet of described unstripped gas water at low temperature cooler Pipe connects with the oral siphon of unstripped gas normal-temperature water cooler, and the outlet pipe of described cold-producing medium water at low temperature cooler is normal with cold-producing medium The oral siphon connection of warm water cooler.
Unstripped gas heat exchanger channels, high pressure cryogen heat exchanger channels and low pressure cryogen it is provided with in described gas liquefaction heat exchanger Heat exchanger channels, the entrance of described unstripped gas heat exchanger channels connects with raw material gas purifying unit, the outlet of unstripped gas heat exchanger channels Being connected with liquid storage tank, the entrance of described high pressure cryogen heat exchanger channels connects with cold-producing medium water at low temperature cooler, and high pressure is cold The outlet of agent heat exchanger channels connects with the entrance of low pressure cryogen heat exchanger channels, and is provided with cryogen throttling on the pipeline of connection Valve, the outlet of described low pressure cryogen heat exchanger channels connects with refrigerant compressor.
Being provided with generation side and evaporation side in described refrigeration unit, described one end that side occurs is with to connect cold-producing medium normal , there is the other end and the water cooler of side in warm water cooler outlet pipe and the pipeline communication of unstripped gas normal-temperature water cooler outlet pipe Connection, one end of described evaporation side connects with the 3rd arm, the other end of evaporation side with connect cold-producing medium water at low temperature cooler Oral siphon and the pipeline communication of unstripped gas water at low temperature cooler oral siphon.
On the described pipeline connected with unstripped gas normal-temperature water cooler oral siphon with cryogen normal-temperature water cooler oral siphon It is additionally provided with low temperature water pot and a low temperature water pump, on this pipeline, is front, described low temperature water pump with the conveying direction of water at low temperature It is positioned at the downstream of low temperature water pot
A kind of band compresses the liquifying method of the gas liquefaction equipment of recuperation of heat, and it comprises the following steps,
The compression cooling of S1: unstripped gas, unstripped gas is after feed gas compressor supercharging, successively by unstripped gas normal-temperature water cooler Cooling down with unstripped gas water at low temperature cooler, the heat of compression is taken away by heat transport fluid simultaneously;
S2: unstripped gas liquefies, by the unstripped gas after S1 pre-cooling through raw material gas purifying unit removing wherein easily frozen block or corrosion Property impurity after, enter gas liquefaction heat exchanger unstripped gas heat exchanger channels in, by low pressure cold of backflowing in gas liquefaction heat exchanger Agent pre-cooling, liquefaction and supercool after, be re-fed in fluid product basin or rectifying column;
S3: refrigerant compression, cold-producing medium, after refrigerant compressor supercharging, is cooled down by normal-temperature water cooler and water at low temperature successively Device cools down, and the heat of compression is taken away by heat transport fluid simultaneously;
S4: refrigerant liquefaction, is entered the high pressure cryogen heat exchanger channels of gas liquefaction heat exchanger by the cold-producing medium after S3 pre-cooling In, low pressure of being backflowed in gas liquefaction heat exchanger cryogen pre-cooling, liquefaction and supercool after, then through cryogen choke valve throttling refrigeration;
S5: cold-producing medium re-heat, the low pressure cryogen being throttled in S4 is back to the low pressure cryogen of gas liquefaction heat exchanger and changes In the passage of heat, returned the entrance of refrigerant compressor after the gasification of hot-fluid stock, re-heat to room temperature wherein, form a refrigeration and follow Ring;
S6: heat transport fluid cools down, and the heat transport fluid absorbing the heat of compression in S1 and S3 step enters sending out of refrigeration unit In raw side, after release heat, the most water cooled but device is cooled and returned in room temperature water pot further;
S7, normal-temperature water, water at low temperature supply, the normal-temperature water come from room temperature water pot is divided into two strands, and one normal-temperature water is through normal-temperature water Unstripped gas normal-temperature water cooler and the entrance of cold-producing medium normal-temperature water cooler is sent into after pump pressurization;Another burst of normal-temperature water enters refrigeration In the evaporation side of unit, the water at low temperature that release heat is produced wherein is admitted to unstripped gas water at low temperature cooler and cold-producing medium is low The entrance of warm water cooler.
A kind of band compresses the liquifying method of the gas liquefaction equipment of recuperation of heat, and it comprises the following steps,
The compression cooling of S1: unstripped gas, unstripped gas is after feed gas compressor supercharging, successively by unstripped gas normal-temperature water cooler Cooling down with unstripped gas water at low temperature cooler, the heat of compression is taken away by heat transport fluid simultaneously;
S2: unstripped gas liquefies, by the unstripped gas after S1 pre-cooling through raw material gas purifying unit removing wherein easily frozen block or corrosion Property impurity after, enter gas liquefaction heat exchanger unstripped gas heat exchanger channels in, by low pressure cold of backflowing in gas liquefaction heat exchanger Agent pre-cooling, liquefaction and supercool after, be re-fed in fluid product basin or rectifying column;
S3: refrigerant compression, cold-producing medium, after refrigerant compressor supercharging, is cooled down by normal-temperature water cooler and water at low temperature successively Device cools down, and the heat of compression is taken away by heat transport fluid simultaneously;
S4: refrigerant liquefaction, is entered the high pressure cryogen heat exchanger channels of gas liquefaction heat exchanger by the cold-producing medium after S3 pre-cooling In, low pressure of being backflowed in gas liquefaction heat exchanger cryogen pre-cooling, liquefaction and supercool after, then through cryogen choke valve throttling refrigeration;
S5: cold-producing medium re-heat, the low pressure cryogen being throttled in S4 is back to the low pressure cryogen of gas liquefaction heat exchanger and changes In the passage of heat, returned the entrance of refrigerant compressor after the gasification of hot-fluid stock, re-heat to room temperature wherein, form a refrigeration and follow Ring;
S6: heat transport fluid cools down, and the heat transport fluid absorbing the heat of compression in S1 and S3 step enters sending out of refrigeration unit In raw side, after release heat, the most water cooled but device is cooled and returned in room temperature water pot further;
S7, normal-temperature water supply, the normal-temperature water come from room temperature water pot is divided into two strands, after the pressurization of one normal-temperature water frequent warm water pump Send into unstripped gas normal-temperature water cooler and the entrance of cold-producing medium normal-temperature water cooler;
S8, water at low temperature supply, another burst of normal-temperature water in S7 enters in the evaporation side of refrigeration unit, discharges heat wherein The water at low temperature produced is admitted in low temperature water pot, and the water at low temperature in low temperature water pot, after low temperature water pump pressurizes, sends into unstripped gas Water at low temperature cooler and the entrance of cold-producing medium water at low temperature cooler, be used for reducing compressor inlet temperature at different levels, thus reduce pressure Contracting power consumption.
The operating temperature of the described high-temperature water after normal-temperature water, water at low temperature and heat transport fluid heat absorption is respectively 20~60 DEG C, 5~30 DEG C, 100~300 DEG C.
Described unstripped gas is one or more in oxygen, nitrogen, hydrogen, natural gas liquefaction or liquid space division, described Cold-producing medium be air, nitrogen, natural gas, formylmerphalan alkane one or more.
Described feed gas compressor and the progression of refrigerant compressor be 1~4 grade or section, its level or intersegmental and outlet are all Using normal-temperature water and the cooling of water at low temperature tandem, described refrigeration unit is lithium bromide absorption refrigerating set or absorption refrigeration With the unit mahine of compression-type refrigeration, described water cooler is one or more of air-cooled, water-cooling type or absorption heat pump.
Described heat transport fluid is for softening water, desalted water, steam, conduction oil, ethylene glycol or methanol aqueous solution.
The invention have the advantages that
1, produce water at low temperature by the recovery heat of compression, the energy consumption of liquefying plant is greatly reduced;
2, low temperature water pot can be also used for cold-storage, can be according to producing water at low temperature or ice outside electricity price difference, it is also possible to only exist Send into water at low temperature when spike or peak electricity tariff, reduce the energy consumption of liquefying plant further;
3, the present invention have simple to operate, energy consumption is low, meets energy-saving and cost-reducing main trend, have good social benefit and Economic benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment one;
Fig. 2 is the structural representation of embodiment two;
In figure, 1-low temperature water pump, 2-low temperature water pot, 3-feed gas compressor, 4-refrigerant compressor, 5-cold-producing medium normal-temperature water Cooler, 6-cold-producing medium water at low temperature cooler, 7-unstripped gas heat exchanger channels, 8-high pressure cryogen heat exchanger channels, 9-low pressure cryogen changes The passage of heat, 10-room temperature water pot, 11-room temperature water pump, there is side in 12-, 13-evaporation side, 14-refrigeration unit, 15-water cooler, 16-unstripped gas normal-temperature water cooler, 17-unstripped gas water at low temperature cooler, 18-raw material gas purifying unit, 19-gas liquefaction heat exchange Device, 20-cryogen choke valve.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings, and protection scope of the present invention is not limited to the following stated:
Embodiment one:
As it is shown in figure 1, the gas liquefaction equipment of a kind of band compression recuperation of heat, it includes unstripped gas processing system, cold-producing medium Processing system, heat of compression recovery system;
In the present embodiment, described unstripped gas processing system includes feed gas compressor 3, unstripped gas normal-temperature water cooler 16, unstripped gas water at low temperature cooler 17, raw material gas purifying unit 18 and gas liquefaction heat exchanger 19, wherein, unstripped gas input pipe Road is connected with feed gas compressor 3, and feed gas compressor 3 connects with unstripped gas normal-temperature water cooler 16, and feed compressor 3 with One unstripped gas supply line connects, and in the present embodiment, described unstripped gas is oxygen, nitrogen, hydrogen, natural gas liquefaction or liquid One or more in body space division, unstripped gas normal-temperature water cooler 16 connects with unstripped gas water at low temperature cooler 17, and unstripped gas is low Warm water cooler 17 connects with raw material gas purifying unit 18, and raw material gas purifying unit 18 connects with gas liquefaction heat exchanger 19, Being additionally provided with a discharge duct on raw material gas purifying unit 18, discharge duct is mainly used in the discharge of carbon dioxide and water;
In the present embodiment, described refrigerant processes system include refrigerant compressor 4, cold-producing medium normal-temperature water cooler 5, Cold-producing medium water at low temperature cooler 6 and gas liquefaction heat exchanger 19, described refrigerant compressor 4 and cold-producing medium normal-temperature water cooler 5 Connection, described cold-producing medium be air, nitrogen, natural gas, formylmerphalan alkane one or more, cold-producing medium normal-temperature water cooler 5 with Cold-producing medium water at low temperature cooler 6 connects, and cold-producing medium water at low temperature cooler 6 connects with gas liquefaction heat exchanger 19, described gas Liquefaction heat exchanger 19 connects with refrigerant compressor 4;
In the present embodiment, described heat of compression recovery system includes room temperature water pot 10, room temperature water pump 11, refrigeration unit 14 With water cooler 15, the outlet pipe of described room temperature water pot 10 is provided with a plurality of arm, wherein, the first arm and room temperature water pump 11 connect, and the second arm connects with water cooler 15, and the 3rd arm connects with refrigeration unit 14, described cold-producing medium room temperature water-cooled But device 5 is all connected with refrigeration unit 14 by same pipeline with the outlet pipe of unstripped gas normal-temperature water cooler 16, and at this pipeline On be provided with valve, described cold-producing medium water at low temperature cooler 6 and the oral siphon of unstripped gas water at low temperature cooler 17 all by with One pipeline connects with refrigeration unit 14, and is provided with valve on this pipeline and oral siphon, described cold-producing medium room temperature water-cooled But device 5 is all connected with room temperature water pump 11 by same pipeline with the oral siphon of unstripped gas normal-temperature water cooler 16, and this oral siphon On be provided with valve, the outlet pipe of described unstripped gas water at low temperature cooler 17 and the oral siphon of unstripped gas normal-temperature water cooler 16 Connection, the outlet pipe of described cold-producing medium water at low temperature cooler 6 connects with the oral siphon of cold-producing medium normal-temperature water cooler 5.
In the present embodiment, be provided with unstripped gas heat exchanger channels 7 in described gas liquefaction heat exchanger 19, high pressure cryogen changes The passage of heat 8 and low pressure cryogen heat exchanger channels 9, the entrance of described unstripped gas heat exchanger channels 7 connects with raw material gas purifying unit 18, The outlet liquid storage tank of unstripped gas heat exchanger channels 7 connects, and i.e. i.e. can lead to from unstripped gas heat exchanger channels 7 fluid product out Cross liquid storage tank to store, it is also possible to enter directly in lower procedure, the entrance of described high pressure cryogen heat exchanger channels 8 and system Cryogen water at low temperature cooler 6 connects, and the outlet of high pressure cryogen heat exchanger channels 8 connects with the entrance of low pressure cryogen heat exchanger channels 9, and Being provided with cryogen choke valve 20 on the pipeline of connection, the outlet of described low pressure cryogen heat exchanger channels 9 is with refrigerant compressor 4 even Logical.
In the present embodiment, the described combination that refrigeration unit 14 is lithium bromide absorption refrigerating set and compression-type refrigeration Machine, is provided with generation side 12 and evaporation side 13 in it, described one end that side 12 occurs with connect cold-producing medium normal-temperature water cooler 5 , there is the other end of side 12 with water cooler 15 even in outlet pipe and the pipeline communication of unstripped gas normal-temperature water cooler 16 outlet pipe Logical, one end of described evaporation side 13 connects with the 3rd arm, and the other end of evaporation side 13 cools down with connecting cold-producing medium water at low temperature Device 6 oral siphon and the pipeline communication of unstripped gas water at low temperature cooler 17 oral siphon.
A kind of band compresses the liquifying method of the gas liquefaction equipment of recuperation of heat, and it comprises the following steps,
The compression cooling of S1: unstripped gas, unstripped gas, after feed gas compressor 3 supercharging, is cooled down by unstripped gas normal-temperature water successively Device 16 and unstripped gas water at low temperature cooler 17 cool down, and the heat of compression is taken away by heat transport fluid simultaneously;
S2: unstripped gas liquefies, and is removed wherein easily frozen block or corruption by the unstripped gas after S1 pre-cooling through raw material gas purifying unit 18 After erosion property impurity, enter in the unstripped gas heat exchanger channels 7 of gas liquefaction heat exchanger 19, backflowed in gas liquefaction heat exchanger 19 Low pressure cryogen pre-cooling, liquefaction and supercool after, be re-fed in fluid product basin or rectifying column;
S3: refrigerant compression, cold-producing medium is after refrigerant compressor 4 supercharging, successively by normal-temperature water cooler 5 and low temperature water-cooled But device 6 cools down, and the heat of compression is taken away by heat transport fluid simultaneously;
S4: refrigerant liquefaction, the high pressure cryogen heat exchange being entered gas liquefaction heat exchanger 19 by the cold-producing medium after S3 pre-cooling is led to In road 8, low pressure of being backflowed in gas liquefaction heat exchanger 19 cryogen pre-cooling, liquefaction and supercool after, then save through cryogen choke valve 20 Stream refrigeration;
S5: cold-producing medium re-heat, the low pressure cryogen being throttled in S4 is back to the low pressure cryogen of gas liquefaction heat exchanger 19 In heat exchanger channels 9, returned the entrance of refrigerant compressor 4 after the gasification of hot-fluid stock, re-heat to room temperature wherein, formed a refrigeration Circulation;
S6: heat transport fluid cools down, and the heat transport fluid absorbing the heat of compression in S1 and S3 step enters refrigeration unit 14 Occurring in side 12, after release heat, the most water cooled but device 15 is cooled and returned in room temperature water pot 10 further;
S7, normal-temperature water, water at low temperature supply, be divided into two strands from the normal-temperature water of room temperature water pot 10, and one normal-temperature water is through room temperature Unstripped gas normal-temperature water cooler 16 and the entrance of cold-producing medium normal-temperature water cooler 5 is sent into after water pump 11 pressurization;Another burst of normal-temperature water Entering in the evaporation side 13 of refrigeration unit 14, the water at low temperature that release heat is produced wherein is admitted to the cooling of unstripped gas water at low temperature Device 17 and the entrance of cold-producing medium water at low temperature cooler 6, thus water at low temperature is continuously introduced into unstripped gas processing system and refrigerant processes In system, reduce equipment investment and floor space.
In the present embodiment, the operating temperature of the described high-temperature water after normal-temperature water, water at low temperature and heat transport fluid heat absorption It is respectively 20~60 DEG C, 5~30 DEG C, 100~300 DEG C.
In the present embodiment, the pressure at expulsion of raw air compressor 3 and refrigerant compressor 4 be respectively 0.5MPa.G and 3.7MPa.G, described feed gas compressor 3 and the progression of refrigerant compressor 4 be 1~4 grade or section, the most all use 2 Level, its level or intersegmental and outlet all employing normal-temperature water and the cooling of water at low temperature tandem.
In the present embodiment, described water cooler is one or more of air-cooled, water-cooling type or absorption heat pump.
In the present embodiment, described heat transport fluid is for softening water, desalted water, steam, conduction oil, ethylene glycol or methanol-water Solution.
In the present embodiment, as a example by a set of KDON-3000Y/2000Y type liquid space division, with the energy of conventional liq space division Consumption is compared, shown in day following table, and its energy consumption range of decrease 7.44%, save up to the electricity charge 1,260,000 yuan in year.
Embodiment two:
As in figure 2 it is shown, the device of the present embodiment and embodiment one is substantially the same, difference is, described is normal with cryogen It is additionally provided with a low temperature water pot 2 on the pipeline that warm water cooler 5 oral siphon connects with unstripped gas normal-temperature water cooler 16 oral siphon With low temperature water pump 1, on this pipeline, it is positioned at low temperature water pot 2 with the low temperature water pump 1 that the conveying direction of water at low temperature is front, described Downstream, low temperature water pot 2 can supplement water at low temperature by a water at low temperature supply line, it is ensured that the lasting supply of water at low temperature, so that Water at low temperature can be continuously introduced in liquefying plant, it is also possible to sends into when spike or peak electricity tariff, and also can be at trough-electricity Produce water at low temperature by compression refrigerating machine during valency, supplement water at low temperature when spike or peak electricity tariff and send in liquefying plant, enter One step reduces energy consumption, and the liquifying method of the gas liquefaction equipment of a kind of band compression recuperation of heat in the present embodiment, with reality The method executing example one is compared, and its step S1~S6 are the most identical, adds two method steps on the basis of S1~S6, it may be assumed that
S7, normal-temperature water supply, be divided into two strands from the normal-temperature water of room temperature water pot 10, and the frequent warm water pump of one normal-temperature water 11 adds Unstripped gas normal-temperature water cooler 16 and the entrance of cold-producing medium normal-temperature water cooler 5 is sent into after pressure;
S8, water at low temperature supply, another burst of normal-temperature water in S7 enters in the evaporation side 13 of refrigeration unit 14, discharges wherein The water at low temperature that heat is produced is admitted in low temperature water pot 2, and the water at low temperature in low temperature water pot 2, after low temperature water pump 1 pressurizes, is sent into Unstripped gas water at low temperature cooler 17 and the entrance of cold-producing medium water at low temperature cooler 6, be used for reducing compressor inlet temperature at different levels, from And reduce compression power consumption.

Claims (10)

1. the gas liquefaction equipment of a band compression recuperation of heat, it is characterised in that: it includes at unstripped gas processing system, cold-producing medium Reason system, heat of compression recovery system;
Described unstripped gas processing system includes feed gas compressor (3), unstripped gas normal-temperature water cooler (16), unstripped gas low temperature Water cooler (17), raw material gas purifying unit (18) and gas liquefaction heat exchanger (19), wherein, unstripped gas input channel and raw material Air compressor (3) connects, and feed gas compressor (3) connects with unstripped gas normal-temperature water cooler (16), and unstripped gas normal-temperature water cools down Device (16) connects with unstripped gas water at low temperature cooler (17), unstripped gas water at low temperature cooler (17) and raw material gas purifying unit (18) Connection, raw material gas purifying unit (18) connects with gas liquefaction heat exchanger (19);
Described refrigerant processes system includes refrigerant compressor (4), cold-producing medium normal-temperature water cooler (5), cold-producing medium water at low temperature Cooler (6) and gas liquefaction heat exchanger (19), described refrigerant compressor (4) connects with cold-producing medium normal-temperature water cooler (5), Cold-producing medium normal-temperature water cooler (5) connects with cold-producing medium water at low temperature cooler (6), cold-producing medium water at low temperature cooler (6) and gas Liquefaction heat exchanger (19) connects, and described gas liquefaction heat exchanger (19) connects with refrigerant compressor (4);
Described heat of compression recovery system includes room temperature water pot (10), room temperature water pump (11), refrigeration unit (14) and water cooler (15), the outlet pipe of described room temperature water pot (10) being provided with a plurality of arm, wherein, the first arm is with room temperature water pump (11) even Connecing, the second arm connects with water cooler (15), and the 3rd arm connects with refrigeration unit (14), described cold-producing medium room temperature water-cooled But device (5) is all connected with refrigeration unit (14) by same pipeline with the outlet pipe of unstripped gas normal-temperature water cooler (16), and Be provided with valve, described cold-producing medium water at low temperature cooler (6) and unstripped gas water at low temperature cooler (17) on this pipeline enters water Guan Jun is connected with refrigeration unit (14) by same pipeline, and is provided with valve on this pipeline and oral siphon, described system The oral siphon of cryogen normal-temperature water cooler (5) and unstripped gas normal-temperature water cooler (16) is all by same pipeline and room temperature water pump (11) connection, and on this oral siphon, it is provided with valve, the outlet pipe of described unstripped gas water at low temperature cooler (17) and unstripped gas The oral siphon connection of normal-temperature water cooler (16), the outlet pipe of described cold-producing medium water at low temperature cooler (6) and cold-producing medium room temperature The oral siphon connection of water cooler (5).
The gas liquefaction equipment of a kind of band the most according to claim 1 compression recuperation of heat, it is characterised in that: described gas Unstripped gas heat exchanger channels (7), high pressure cryogen heat exchanger channels (8) and low pressure cryogen heat exchanger channels it is provided with in liquefaction heat exchanger (19) (9), the entrance of described unstripped gas heat exchanger channels (7) connects with raw material gas purifying unit (18), unstripped gas heat exchanger channels (7) Outlet is connected with liquid storage tank, and the entrance of described high pressure cryogen heat exchanger channels (8) is with cold-producing medium water at low temperature cooler (6) even Logical, the outlet of high pressure cryogen heat exchanger channels (8) connects with the entrance of low pressure cryogen heat exchanger channels (9), and on the pipeline of connection Being provided with cryogen choke valve (20), the outlet of described low pressure cryogen heat exchanger channels (9) connects with refrigerant compressor (4).
The gas liquefaction equipment of a kind of band the most according to claim 2 compression recuperation of heat, it is characterised in that: described refrigeration Be provided with generation side (12) and evaporation side (13) in unit (14), one end of described generation side (12) with connect cold-producing medium room temperature , there is the other end of side (12) in water cooler (5) outlet pipe and the pipeline communication of unstripped gas normal-temperature water cooler (16) outlet pipe Connecting with water cooler (15), one end of described evaporation side (13) connects with the 3rd arm, the other end of evaporation side (13) with Connection cold-producing medium water at low temperature cooler (6) oral siphon and the pipeline communication of unstripped gas water at low temperature cooler (17) oral siphon.
The gas liquefaction equipment of a kind of band the most according to claim 3 compression recuperation of heat, it is characterised in that: described with cold It is additionally provided with one low on the pipeline that agent normal-temperature water cooler (5) oral siphon connects with unstripped gas normal-temperature water cooler (16) oral siphon Warm water tank (2) and low temperature water pump (1), on this pipeline, be front, described low temperature water pump (1) position with the conveying direction of water at low temperature Downstream in low temperature water pot (2).
5. the liquifying method of gas liquefaction equipment based on the compression recuperation of heat of a kind of band of any one described in claim 1 ~ 3, It is characterized in that: it comprises the following steps,
The compression cooling of S1: unstripped gas, unstripped gas is after feed gas compressor (3) supercharging, successively by unstripped gas normal-temperature water cooler (16) cooling down with unstripped gas water at low temperature cooler (17), the heat of compression is taken away by heat transport fluid simultaneously;
S2: unstripped gas liquefies, by the unstripped gas after S1 pre-cooling through raw material gas purifying unit (18) removing wherein easily frozen block or corrosion Property impurity after, enter gas liquefaction heat exchanger (19) unstripped gas heat exchanger channels (7) in, quilt in gas liquefaction heat exchanger (19) Low pressure of backflowing cryogen pre-cooling, liquefaction and supercool after, be re-fed in fluid product basin or rectifying column;
S3: refrigerant compression, cold-producing medium is after refrigerant compressor (4) supercharging, successively by normal-temperature water cooler (5) and low temperature water-cooled But device (6) cooling, the heat of compression is taken away by heat transport fluid simultaneously;
S4: refrigerant liquefaction, is entered the high pressure cryogen heat exchanger channels of gas liquefaction heat exchanger (19) by the cold-producing medium after S3 pre-cooling (8) in, low pressure of being backflowed in gas liquefaction heat exchanger (19) cryogen pre-cooling, liquefaction and supercool after, then through cryogen choke valve (20) throttling refrigeration;
S5: cold-producing medium re-heat, the low pressure cryogen being throttled in S4 is back to the low pressure cryogen of gas liquefaction heat exchanger (19) and changes In the passage of heat (9), returned the entrance of refrigerant compressor (4) after the gasification of hot-fluid stock, re-heat to room temperature wherein, formed a system SAPMAC method;
S6: heat transport fluid cools down, and the heat transport fluid absorbing the heat of compression in S1 and S3 step enters sending out of refrigeration unit (14) In raw side (12), after release heat, the most water cooled but device (15) is cooled and returned in room temperature water pot (10) further;
S7, normal-temperature water, water at low temperature supply, the normal-temperature water come from room temperature water pot (10) is divided into two strands, and one normal-temperature water is through normal-temperature water Unstripped gas normal-temperature water cooler (16) and the entrance of cold-producing medium normal-temperature water cooler (5) is sent into after pump (11) pressurization;Another stock is normal Warm water enters in the evaporation side (13) of refrigeration unit (14), and it is low that the water at low temperature that release heat is produced wherein is admitted to unstripped gas Warm water cooler (17) and the entrance of cold-producing medium water at low temperature cooler (6).
6. the liquifying method of the gas liquefaction equipment of recuperation of heat is compressed based on a kind of band described in claim 4, it is characterised in that: It comprises the following steps,
The compression cooling of S1: unstripped gas, unstripped gas is after feed gas compressor (3) supercharging, successively by unstripped gas normal-temperature water cooler (16) cooling down with unstripped gas water at low temperature cooler (17), the heat of compression is taken away by heat transport fluid simultaneously;
S2: unstripped gas liquefies, by the unstripped gas after S1 pre-cooling through raw material gas purifying unit (18) removing wherein easily frozen block or corrosion Property impurity after, enter gas liquefaction heat exchanger (19) unstripped gas heat exchanger channels (7) in, quilt in gas liquefaction heat exchanger (19) Low pressure of backflowing cryogen pre-cooling, liquefaction and supercool after, be re-fed in fluid product basin or rectifying column;
S3: refrigerant compression, cold-producing medium is after refrigerant compressor (4) supercharging, successively by normal-temperature water cooler (5) and low temperature water-cooled But device (6) cooling, the heat of compression is taken away by heat transport fluid simultaneously;
S4: refrigerant liquefaction, is entered the high pressure cryogen heat exchanger channels of gas liquefaction heat exchanger (19) by the cold-producing medium after S3 pre-cooling (8) in, low pressure of being backflowed in gas liquefaction heat exchanger (19) cryogen pre-cooling, liquefaction and supercool after, then through cryogen choke valve (20) throttling refrigeration;
S5: cold-producing medium re-heat, the low pressure cryogen being throttled in S4 is back to the low pressure cryogen of gas liquefaction heat exchanger (19) and changes In the passage of heat (9), returned the entrance of refrigerant compressor (4) after the gasification of hot-fluid stock, re-heat to room temperature wherein, formed a system SAPMAC method;
S6: heat transport fluid cools down, and the heat transport fluid absorbing the heat of compression in S1 and S3 step enters sending out of refrigeration unit (14) In raw side (12), after release heat, the most water cooled but device (15) is cooled and returned in room temperature water pot (10) further;
S7, normal-temperature water supply, the normal-temperature water come from room temperature water pot (10) is divided into two strands, and the frequent warm water pump of one normal-temperature water (11) adds Unstripped gas normal-temperature water cooler (16) and the entrance of cold-producing medium normal-temperature water cooler (5) is sent into after pressure;
S8, water at low temperature supply, another burst of normal-temperature water in S7 enters in the evaporation side (13) of refrigeration unit (14), discharges wherein The water at low temperature that heat is produced is admitted in low temperature water pot (2), and the water at low temperature in low temperature water pot (2) is pressurizeed through low temperature water pump (1) After, send into unstripped gas water at low temperature cooler (17) and the entrance of cold-producing medium water at low temperature cooler (6), be used for reducing compressor at different levels Inlet temperature, thus reduce compression power consumption.
7. compress the liquifying method of the gas liquefaction equipment of recuperation of heat according to a kind of band described in claim 5 or 6, its feature exists In: the operating temperature of the high-temperature water after described normal-temperature water, water at low temperature and heat transport fluid heat absorption be respectively 20 ~ 60 DEG C, 5 ~ 30 ℃、100~300℃。
The liquifying method of the gas liquefaction equipment of a kind of band the most according to claim 7 compression recuperation of heat, it is characterised in that: Described unstripped gas is one or more in oxygen, nitrogen, hydrogen, natural gas liquefaction or liquid space division, described cold-producing medium For air, nitrogen, natural gas, formylmerphalan alkane one or more.
The liquifying method of the gas liquefaction equipment of a kind of band the most according to claim 8 compression recuperation of heat, it is characterised in that: Described feed gas compressor (3) and the progression of refrigerant compressor (4) be 1 ~ 4 grade or section, its level or intersegmental and outlet all adopt Cooling down by normal-temperature water and water at low temperature tandem, described refrigeration unit (14) is lithium bromide absorption refrigerating set or absorption refrigeration With the unit mahine of compression-type refrigeration, described water cooler (15) is the one of air-cooled, water-cooling type or absorption heat pump or many Kind.
The liquifying method of the gas liquefaction equipment of a kind of band the most according to claim 9 compression recuperation of heat, its feature exists In: described heat transport fluid is for softening water, desalted water, steam, conduction oil, ethylene glycol or methanol aqueous solution.
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