CN108072235A - Space division system - Google Patents

Space division system Download PDF

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Publication number
CN108072235A
CN108072235A CN201611022494.9A CN201611022494A CN108072235A CN 108072235 A CN108072235 A CN 108072235A CN 201611022494 A CN201611022494 A CN 201611022494A CN 108072235 A CN108072235 A CN 108072235A
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China
Prior art keywords
pipe
plant
output terminal
air separation
pipeline
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CN201611022494.9A
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CN108072235B (en
Inventor
钱立新
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JIANGSU SUZHOU STEEL GROUP CO Ltd
New Founder Holdings Development Co ltd
Suzhou Suxin Special Steel Co ltd
Original Assignee
JIANGSU STEEL GROUP CO Ltd JIANGSU
SUZHOU SUXIN SPECIAL STEEL CO Ltd
Peking University Founder Group Co Ltd
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Publication of CN108072235A publication Critical patent/CN108072235A/en
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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
    • 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
    • F25J3/04—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 for air
    • F25J3/04406—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 for air using a dual pressure main column system
    • F25J3/04412—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 for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
    • 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
    • F25J3/04—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 for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • 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
    • F25J3/04—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 for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04218—Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure cores
    • F25J3/04224—Cores associated with a liquefaction or refrigeration cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • 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
    • F25J3/04—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 for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
    • 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
    • F25J3/04—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 for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/04351—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen
    • F25J3/04357—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen and comprising a gas work expansion loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • 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
    • F25J3/04—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 for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
    • F25J3/04393—Details relating to the work expansion, e.g. process parameter etc. using multiple or multistage gas work expansion
    • 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
    • F25J3/04—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 for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04793—Rectification, e.g. columns; Reboiler-condenser
    • 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
    • F25J3/04—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 for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04812—Different modes, i.e. "runs" of operation
    • F25J3/04818—Start-up of the process
    • 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
    • F25J3/04—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 for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04951—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network
    • F25J3/04957—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network and inter-connecting equipments upstream of the fractionation unit (s), i.e. at the "front-end"
    • 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
    • F25J2230/24—Multiple compressors or compressor stages in parallel
    • 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
    • F25J2230/40—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
    • F25J2240/04—Multiple expansion turbines in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/40—Processes or apparatus involving steps for recycling of process streams the recycled stream being air

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The present invention provides a kind of space division system, including：Air separation plant, including material processing device, heat-exchanger rig and the pipeline that backflows, the output terminal of pipeline that backflows is connected first pipe and second pipe with the cold medium input terminal of heat-exchanger rig, one end of first pipe is connected with the output terminal of material processing device, and first pipe 3 is equipped with the first control unit；One end of second pipe is connected with the pipeline that backflows, and second pipe is equipped with the second control unit；Liquefying plant, including cooling device, the other end of the input terminal and output terminal of cooling device respectively with the other end of first pipe and second pipe is connected；Wherein, when air separation plant is activated, the control first pipe conducting of the first control unit, and the control second pipe conducting of the second control unit.The present invention aids in air separation plant to start using the cooling device of liquefying plant, so as to greatly shorten the startup time of air separation plant, and then significantly reduces the energy consumption of the industries such as metallurgy, realizes energy saving purpose.

Description

Space division system
Technical field
The present invention relates to technical field of air separation, in particular to a kind of space division system.
Background technology
Air separation plant is the energy consumption rich and influential family of the industries such as metallurgy, and air separation plant is before normally produce, it is necessary to complete to open Dynamic process.The start-up course of air separation plant includes cooling device, accumulating liquid and adjusts purity three phases, cold in three phases But equipment, accumulating liquid need substantial amounts of cold to complete, and especially use the flow of structured packing Full distillation argon making now, need The cold storage capacity bigger wanted.
In the prior art, the cold in air separation plant start-up course is typically derived from the turbine expansion of air separation plant itself Machine, but the turbo-expander of itself matches with supplementing cold damage during normal operation, therefore refrigerating capacity is limited, and space division is caused to set The standby startup time is very long.And during air separation plant starts, the main powerful device such as raw material air compressor machine is in lasting fortune Row, but since this stage main condenser evaporator does not work still, so the air of processing largely diffuses, and it is only swollen into turbine on a small quantity Swollen machine freezes, so the energy consumption of startup stage is very big, and only energy consumption does not have product output.
The content of the invention
At least one in order to solve the above-mentioned technical problem, it is an object of the invention to provide a kind of space division systems.
The present invention provides a kind of space division system, including：Air separation plant including material processing device, heat-exchanger rig and returns Flow tube road, the material processing device can export the air of dried and clean, output terminal and the heat exchange of the pipeline that backflows The cold medium input terminal of device is connected；First pipe and second pipe, one end of the first pipe are filled with the feedstock processing The output terminal put is connected, and the first pipe is equipped with to control the first control unit of the first pipe break-make； One end of the second pipe is connected with the pipeline that backflows, and the second pipe is equipped with to control second pipe Second control unit of road break-make；Liquefying plant, including cooling device, the input terminal of the cooling device and the first pipe The other end be connected, the output terminal of the cooling device is connected with the other end of the second pipe；Wherein, the space division When equipment is activated, first control unit controls the first pipe conducting, and described in second control unit control Second pipe turns on.
Space division system provided by the invention, using the cooling device of liquefying plant come auxiliary cooling, since liquefying plant needs Liquid is produced, so the refrigerating capacity of its cooling device is very big, so as to greatly shorten the startup time of air separation plant, and then The energy consumption of the industries such as metallurgy is significantly reduced, realizes energy saving purpose；Meanwhile the present invention is different from normal liquefying plant profit Freezed with the source of the gas of recycle compressor, but make use of the air that the material processing device of air separation plant diffuses to freeze, both The utilization rate of the air of material processing device processing is improved, also saves energy consumption during liquefying plant refrigeration, thus The energy is greatly saved.
Further, since the gas consumer interruption of smelter uses, but mating air separation plant is continuous production , in order to reduce the waste of diffusing of gas products, relevant enterprise is generally equipped with individual liquefying plant, by gas more than needed Product liquefied storage.And before air separation plant normally starts, due to still without the qualified gas products of production, liquefaction dress It is often also what is stopped transport to put, and can just be utilized to auxiliary cooling.Therefore, the technical program only need to be to existing air separation plant It is slightly transformed with liquefying plant, you can achieve the purpose that shortening air separation plant starts the time, and then generate considerable energy saving Effect, convenient for promoting, and with extraordinary application prospect.
Specifically, when air separation plant starts, raw air can be processed into the sky of dried and clean by material processing device Gas exports, and a portion air is entered the cooling device of liquefying plant by first pipe, is cooled in cooling device low The pipeline that backflows of air separation plant is delivered to after warm fluid by second pipe, the heat exchange that air separation plant is entered by the pipeline that backflows fills Put, in heat-exchanger rig by cold contribute come, for air separation plant startup stage use, due to cooling device refrigerating capacity very Greatly, so the cold of supply air separation plant is also considerable, so as to greatly shorten the startup time of air separation plant, saving can The energy of sight.When air separation plant main condenser evaporator liquid level close to working depth, i.e. air separation plant has substantially been completed During startup, first pipe and second pipe are cut off, simultaneously closes off the cooling device of liquefying plant, air separation plant can be normal Work.
What deserves to be explained is liquefying plant generally comprises medium input channel, recycle compressor, cooling device, is recycled back to Flow tube road and liquid storaging device, cooling device include booster expansion machine and heat exchanger, medium input channel and recycle compressor Input terminal and one end of circulating reflux pipeline be connected, the output terminal of recycle compressor and the plenum of booster expansion machine it is defeated Enter end to be connected, the input terminal phase of the output terminal of plenum and the thermal medium input terminal of heat exchanger and the bulge of booster expansion machine Even, the output terminal of bulge is connected with the cold medium input terminal of heat exchanger, and the thermal medium output terminal of heat exchanger is with being recycled back to flow tube The other end in road is connected, and the cold medium output terminal of heat exchanger is connected with liquid storaging device.Its corresponding operation principle is：Fluid Medium enters liquefying plant by medium input channel, and first-time compression is carried out in recycle compressor subsequently into recycle compressor, Second-compressed is carried out subsequently into the plenum of booster expansion machine, subsequently into heat exchanger；Into the fluid media (medium) point of heat exchanger For two-way, the bulge for entering booster expansion machine after preliminary cooling all the way carries out deep refrigerating, returns and change again after deep refrigerating Hot device exchanges heat with another way fluid media (medium) in heat exchanger, another way fluid media (medium) is enable fully to exchange heat in heat exchanger cold But become liquid to be exported by the cold medium output terminal of heat exchanger, and the fluid exported after exchanging heat by the thermal medium output terminal of heat exchanger Medium is back to the input terminal of recycle compressor through circulating reflux pipeline, behind the fluid media (medium) interflow of medium input channel input Continue to compress into recycle compressor；And it is then stored up by the liquid of heat exchanger cold medium output terminal output into liquid storaging device It deposits.
It follows that during liquefying plant normal use, freezed using the source of the gas of recycle compressor, and cycle compression Energy consumption when machine is run is also very big；And the application using liquefying plant auxiliary air separation plant start when, liquefying plant is then The air processed using the material processing device of air separation plant is freezed, when starting due to air separation plant, feedstock processing Device is centainly in operating status, so the partial air supply liquefying plant processed, had both improved its own and had added The utilization rate for the air that work comes out, in turn avoids the operation of the high-power recycle compressor of liquefying plant, thus also greatly saves The about energy.
It is understood that air separation plant generally comprises material processing device, refrigerating plant, heat-exchanger rig, rectifying column, returns Flow tube road and medium output channel：The output terminal of material processing device and the thermal medium input terminal of heat-exchanger rig and refrigerating plant Input terminal is connected, and the cold medium output terminal of heat-exchanger rig is connected with the lower tower of rectifying column, the output terminal of refrigerating plant and rectifying The upper tower of tower is connected, and the input terminal for the pipeline that backflows is connected with the medium output terminal of rectifying column, the output terminal for the pipeline that backflows and heat exchange The cold medium input terminal of device is connected, and the thermal medium output terminal of heat-exchanger rig is connected with medium output channel.It works accordingly Principle is：The dried and clean air exported by material processing device is divided into two-way, all the way into heat-exchanger rig, with the pipeline that backflows Enter the lower tower of rectifying column after the cryogenic media heat exchange cooling inputted in heat-exchanger rig；Another way enters in refrigerating plant, is making Enter the upper tower of rectifying column in device for cooling after deep refrigerating cooling；Shang Ta and lower tower are engaged, and divide air into various fluids Medium, such as low temperature nitrogen, cryogenic oxygen, low temperature dirt nitrogen, and exported from the medium output terminal of upper tower；The cryogen of output is situated between Then matter flows to heat-exchanger rig into backflowing pipeline, in heat-exchanger rig with after air heat-exchange by thermal medium output terminal export to Medium output channel.
So the essence of the application is：Dry air all the way is terminated in the output of the raw material output device of air separation plant Pipeline to liquefying plant cooling device, while liquefying plant cooling device output termination all the way cryogen pipe to sky Subset backflows on pipeline, in such manner, it is possible to provide the system for being just more than air separation plant of cold for air separation plant startup stage Device for cooling (generally turbo-expander) further includes the cooling device of liquefying plant, and due to the cooling device of liquefying plant Refrigerating capacity to be far longer than the refrigerating plant of air separation plant, so play decisive shadow to the startup time of air separation plant It rings, so as to substantially reduce the startup time of air separation plant, and then has significantly saved energy consumption, the industries such as metallurgy can have been produced New era of the industries such as raw tremendous influence, developing metallurgy.
In addition, the space division system in above-described embodiment provided by the invention can also have following additional technical feature：
In the above-mentioned technical solutions, first control unit includes the first shut-off valve；Second control unit includes Second shut-off valve.
First shut-off valve in first pipe is set, the second shut-off valve is set on second pipe, passes through the first shut-off valve First pipe and the break-make of second pipe can be effectively controlled with the break-make of the second shut-off valve, it is simple in structure, and control reliable.Tool Body, when starting air separation plant, the first shut-off valve and the second shut-off valve are opened, and starts the cooling device of liquefying plant, you can Utilize liquefying plant assistant starting air separation plant；When air separation plant is substantially finished startup, the first shut-off valve and second is closed Shut-off valve, and close the cooling device of liquefying plant, enable air separation plant and liquefying plant according to respective production process just Often production.
In any of the above-described technical solution, first control unit further includes the 3rd shut-off valve and the first blow valve, institute It states the 3rd shut-off valve to be disposed adjacent with first shut-off valve, first blow valve is located at first shut-off valve and described the Between three shut-off valves.
First control unit further includes the 3rd shut-off valve and the first blow valve, i.e., set in first pipe there are two shut-off valve and One blow valve, be so in order to ensure air separation plant start after first pipe can reliably cut off, to avoid normal work First pipe leakage air pollutes the fluid media (medium) in liquefying plant when making.Specifically, when starting air separation plant, open First shut-off valve and the second shut-off valve close the first blow valve, to realize the conducting of first pipe；Air separation plant startup finishes When, the first shut-off valve and the second shut-off valve are closed, the first blow valve is opened, to check whether first pipe leaks, convenient for timely It takes measures.
What deserves to be explained is due to normal work when, second pipe both ends flowing be all high-purity fluid media (medium), The risk of pollution is smaller, so a shut-off valve need to be only set.
In any of the above-described technical solution, the outside of the outside of the first pipe and the second pipe is enclosed with heat preservation Material.
In any of the above-described technical solution, the thermal insulation material of the external package of the first pipe is mineral material；It is described The thermal insulation material of the external package of second pipe is polyurethane foam material.
In first pipe and the external package thermal insulation material of second pipe, can reduce in first pipe and second pipe The loss of refrigeration capacity of fluid media (medium) so as to improve the utilization rate of cold, further shortens the startup time of air separation plant.Wherein, exist The external package general mineral material of heat-insulating property of first pipe, is certainly not limited to mineral material, is because first pipe Middle flowing be material processing device output air, this partial air is that have passed through the preliminary precooling of cooling tower, thus temperature Degree is not especially low, therefore is kept the temperature using common mineral material；And what is flowed in second pipe is then cooling device The air that deep refrigerating is crossed, the temperature of this partial air are to start for being delivered to air separation plant for air separation plant than relatively low Use, so the relatively good polyurethane foam material of heat-insulating property need to be used, naturally it is also possible to be other heat-insulating properties compared with Good thermal insulation material, could effectively reduce loss of refrigeration capacity.
What deserves to be explained is since first pipe is fully located at outside ice chest, so entire pipeline is required for package thermal insulating material Material；And second pipe may partly be located in ice chest, it, need to be since the temperature in ice chest is very low, therefore only partly outside ice chest Portion envelops thermal insulation material outside ice chest.
In any of the above-described technical solution, the cooling device includes booster expansion machine and heat exchanger, the pressuring expansion Machine includes plenum and bulge, and the input terminal of the plenum is connected with the input terminal of the cooling device, the supercharging The output terminal in portion is connected with the thermal medium input terminal of the heat exchanger and the input terminal of the bulge, the bulge it is defeated Outlet is connected with the cold medium input terminal of the heat exchanger, cold medium output terminal and the cooling device of the heat exchanger Output terminal is connected；Wherein, when the air separation plant is activated, the thermal medium output terminal of the heat exchanger is connected with the external world, For diffusing the fluid media (medium) from the thermal medium output terminal output of the heat exchanger.
In any of the above-described technical solution, the medium input channel and the thermal medium of the heat exchanger of the liquefying plant are defeated Circulating reflux pipeline is equipped between outlet；The fluid media (medium) of the thermal medium output terminal output of the heat exchanger follows followed by described It is discharged after ring reflux line, the medium input channel；Or, the circulating reflux pipeline is equipped with close to the medium input pipe 4th shut-off valve in road, and the 3rd pipe of the thermal medium output terminal close to the heat exchanger is connected on the circulating reflux pipeline Road, the 3rd pipeline be equipped with the second blow valve, the heat exchanger thermal medium output terminal output fluid media (medium) warp described in 3rd pipeline is discharged.
As before, during liquefying plant normal operation, source of the gas is entered the input terminal of cooling device by recycle compressor, specially into Enter the plenum of booster expansion machine；Liquid medium after cooling liquefaction, which is exported by the output terminal of cooling device to fluid storage, to be filled It puts, is specially exported by the cold medium output terminal of heat exchanger；And during cooling device works, the expansion of booster expansion machine The cryogenic gas of portion's output is refrigerant source in heat exchanger, i.e., bulge must be to heat exchanger transporting low temperature gas, and low temperature Gas exchanges heat in heat exchanger after heating can be from the output of the thermal medium output terminal of heat exchanger and circulating reflux to recycle compressor.But It is that when liquefying plant auxiliary air separation plant starts, recycle compressor does not work, so need exchanger heat medium output terminal The gas of output diffuses, to ensure the normal operation of cooling device.As for specifically mode is diffused, can have but be not limited to Following two situations：
Since circulating reflux pipeline is connected with the medium input channel of liquefying plant, and medium input channel necessarily can be with External world's connection, therefore the gas of the thermal medium output terminal output of heat exchanger can be directly through circulating reflux pipeline and medium input pipe Road is diffused in external environment, so the transformation smaller to existing apparatus, it is easier to be implemented；Or
Threeth pipeline of the connection with the second blow valve on medium back flow pipeline, by the 3rd pipeline by the heat of heat exchanger The gas of medium output terminal output is diffused into external environment, while for the normal operation for ensureing liquefying plant, need to cycled 4th shut-off valve is set on reflux line, and the 4th shut-off valve is between medium input channel and the 3rd pipeline, when startup space division During equipment, the 4th shut-off valve is closed, opens the second blow valve, when air separation plant startup finishes, the 4th shut-off valve is opened, closes Second blow valve can equally achieve the object of the present invention, also within the scope of the present invention.
In any of the above-described technical solution, the liquefying plant is single expansion liquefying plant with refrigerator；Or, the liquid Makeup is set to high-low pressure twin-stage expansion liquefying plant, and the cooling device of the high-low pressure twin-stage expansion liquefying plant includes two institutes Booster expansion machine is stated, is respectively low-pressure stage booster expansion machine and hiigh pressure stage booster expansion machine, and during air separation plant startup, only There is the low-pressure stage booster expansion machine to start.
Liquefying plant is single expansion liquefying plant with refrigerator, i.e. cooling device only includes an increase expanding machine, but It is also associated with refrigerator between booster expansion machine and heat exchanger, refrigerator, which can further improve cooling device and be conveyed to space division, to be set Standby cold, so as to further shorten the startup time of air separation plant.
Liquefying plant for high-low pressure twin-stage expand liquefying plant, i.e., its cooling device include two booster expansion machines, one The pressure medium of booster expansion machine output is relatively low, for low-pressure stage booster expansion machine, Jie of another booster expansion machine output Matter pressure is relatively high, be high-pressure unit booster expansion machine, only use its low-pressure stage expanding machine aid in air separation plant startup be because All it is all low-pressure flow for metallurgy type air separation plant major part, so the only gas pressure and space division of low-pressure stage expanding machine output Equipment matches.
Certainly, the species of liquefying plant is varied, it is not limited to and above-mentioned two situations will not enumerate herein, As long as it is understood by those skilled in the art that using the cooling device of liquefying plant air separation plant is aided in freeze, i.e., Meet the design philosophy and objective of the application, thus should all be in the protection domain of the application.
In any of the above-described technical solution, the material processing device includes raw material air compressor machine and molecular sieve adsorber, institute The input terminal for stating molecular sieve adsorber is connected with the output terminal of the raw material air compressor machine, the output terminal of the molecular sieve adsorber It is connected with the output terminal of the material processing device.
Material processing device includes raw material air compressor machine and molecular sieve adsorber, and raw material air compressor machine can compress raw air For the air with certain pressure, molecular sieve adsorber can by compressed air water vapour, carbon dioxide, acetylene, The ingredient that propylene, propane and nitrous oxide etc. are harmful to air separation plant and liquefying plant is got rid of, and obtains the air of dried and clean It is used for air separation plant and liquefying plant, to ensure the normal operation of air separation plant and liquefying plant.
In any of the above-described technical solution, the pipeline that backflows includes nitrogen return tube, oxygen return tube and dirty nitrogen and backflows Pipe, one end of the second pipe is connected in the nitrogen return tube.
One end of second pipe is connected in nitrogen return tube, is because compared with other return tubes, nitrogen backflows The input terminal of pipe is located at the top of upper tower, and by the safety valve pipeline cooling box above upper tower, so for having space division For equipment and the unit of liquefying plant, can directly second pipe be connected on the pipe of safety valve pipeline cooling box, So it is convenient to carry out, and investment reduction；As for the other end of second pipe, due to the ice chest very little of liquefying plant, sand is directly taken off Transformation.Certainly, for the unit for creating air separation plant and liquefying plant, the application can be utilized directly in ice chest This pipeline is set, preferably the ice chest of the ice chest of air separation plant and liquefying plant is made on same concrete foundation, even Liquefying plant is embedded in the ice chest of air separation plant, it so can be with specific aim optimization design pipeline.And for first pipe, due to It is outside ice chest, so easily transformation.
Certainly, it will be understood by those of skill in the art that when starting due to air separation plant, the fluid media (medium) of circulation is all empty Gas, and collected without output of products, therefore one end of second pipe can also be connected in oxygen return tube or dirty nitrogen return tube, Or work as the pipeline that backflows and further include the return tube of other media, such as during argon gas return tube, these return tubes can also be connected to Into on the pipeline of heat-exchanger rig, as long as considering the matching of pressure rating, and the measure of contamination of products when preventing operation is taken, It is just attained by and shortens the effect that air separation plant starts the time, and its basic principle is the same, be will not enumerate herein, but It is within the scope of protection of the invention.
In any of the above-described technical solution, the air separation plant is the air separation plant of external compression flow.
Compared with the air separation plant of Internal-compression flow, the air separation plant of external compression flow is matched somebody with somebody due to that need not produce liquid The turbine expander refrigeration amount put is relatively smaller, it is only necessary to and cold damage during normal production is supplemented, causes the available machine time longer, Therefore its startup is aided in using liquefying plant, there is more significant energy-saving significance.Certainly, the air separation plant of Internal-compression flow Its starting up can be aided in using liquefying plant, and can equally play and shorten the available machine time to save the purpose of energy consumption.
The additional aspect and advantage of the present invention will become practice apparent or by the present invention in following description section Recognize.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment Substantially and it is readily appreciated that, wherein：
Fig. 1 is the structure diagram of the air separation plant of one embodiment of the invention；
Fig. 2 is the structure diagram of the liquefying plant of one embodiment of the invention.
Wherein, the correspondence between the reference numeral in Fig. 1 and Fig. 2 and component names is：
1 air separation plant, 10 raw material air compressor machines, 20 molecular sieve adsorbers, 30 turbo-expanders, 40 heat-exchanger rigs, 50 supercoolings Device, 61 times towers, 62 main condenser evaporators, tower on 63,71 nitrogen return tubes, 72 oxygen return tubes, 73 dirty nitrogen return tubes, 81 nitrogen Efferent duct, 82 oxygen output tubes, 83 dirty nitrogen efferent ducts, 2 liquefying plants, 210 recycle compressors, 211 the 5th shut-off valves, 220 increase Compression swelling machine, 221 plenum, 222 bulges, 230 refrigerators, 240 heat exchangers, 250 liquid storaging devices, 260 circulating refluxs Pipeline, 261 the 4th shut-off valves, 270 medium input channels, 3 first pipes, 310 first shut-off valves, 320 the 3rd shut-off valves, 330 First blow valve, 4 second pipes, 410 second shut-off valves, 5 the 3rd pipelines, 510 second blow valves.
Specific embodiment
It is to better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real Mode is applied the present invention is further described in detail.It should be noted that in the case where there is no conflict, the implementation of the application Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also To be implemented using other different from other modes described here, therefore, protection scope of the present invention and from described below Specific embodiment limitation.
Referring to the space division system of Fig. 1 and Fig. 2 descriptions according to some embodiments of the invention.
As depicted in figs. 1 and 2, space division system provided by the invention, including：Air separation plant 1, first pipe 3, second pipe 4 and liquefying plant 2.
Specifically, air separation plant 1 includes material processing device, heat-exchanger rig 40 and the pipeline that backflows, material processing device energy The air of dried and clean is enough exported, the output terminal for the pipeline that backflows is connected with the cold medium input terminal of heat-exchanger rig 40；First pipe 3 One end be connected with the output terminal of material processing device, and first pipe 3 is equipped with to control the of 3 break-make of first pipe One control unit；One end of second pipe 4 is connected with the pipeline that backflows, and second pipe 4 is equipped with to control second pipe 4 Second control unit of break-make；Liquefying plant 2 includes cooling device, the input terminal of cooling device and the other end of first pipe 3 It is connected, the output terminal of cooling device is connected with the other end of second pipe 4；Wherein, when air separation plant 1 is activated, first Control unit control first pipe 3 turns on, and the second control unit control second pipe 4 turns on.
Space division system provided by the invention, using the cooling device of liquefying plant 2 come auxiliary cooling, due to liquefying plant 2 It needs to produce liquid, so the refrigerating capacity of its cooling device is very big, so as to greatly shorten the startup time of air separation plant 1, And then the energy consumption of the industries such as metallurgy is significantly reduced, realize energy saving purpose；Meanwhile the present invention is different from normal liquefaction and fills 2 are put using the source of the gas of recycle compressor 210 to freeze, but the air that the material processing device of air separation plant 1 make use of to diffuse Freeze, both improved the utilization rate of the air of material processing device processing, also save energy when liquefying plant 2 freezes and disappear Consumption, thus the energy is also greatly saved.
Further, since the gas consumer interruption of smelter uses, but mating air separation plant 1 is continuous production , in order to reduce the waste of diffusing of gas products, relevant enterprise is generally equipped with individual liquefying plant 2, by gas more than needed Body product liquefied storage.And before air separation plant 1 normally starts, due to still without the qualified gas products of production, liquid It is often also what is stopped transport that makeup, which puts 2, can just be utilized to auxiliary cooling.Therefore, the technical program only need to be to existing sky Subset 1 and liquefying plant 2 are slightly transformed, you can achieve the purpose that shortening air separation plant 1 starts the time, and then generation can The energy-saving effect of sight, convenient for promoting, and with extraordinary application prospect.
More specifically, as shown in Fig. 2, cooling device includes booster expansion machine 220 and heat exchanger 240, booster expansion machine 220 Including plenum 221 and bulge 222, the input terminal of plenum 221 is connected with the input terminal of cooling device, plenum 221 Output terminal be connected with the thermal medium input terminal of heat exchanger 240 and the input terminal of bulge 222, the output terminal of bulge 222 It is connected with the cold medium input terminal of heat exchanger 240, the cold medium output terminal of heat exchanger 240 is connected with the output terminal of cooling device It is logical；Wherein, when air separation plant 1 is activated, the thermal medium output terminal of heat exchanger 240 is connected with the external world, for diffusing from heat exchange The fluid media (medium) of the thermal medium output terminal output of device 240.
Further, as shown in Fig. 2, the medium input channel 270 of liquefying plant 2 and the thermal medium of heat exchanger 240 export Circulating reflux pipeline 260 is equipped between end；The fluid media (medium) of the thermal medium output terminal output of heat exchanger 240 is followed by being recycled back to It is discharged after flow tube road 260, medium input channel 270；Or, circulating reflux pipeline 260 is equipped with close to medium input channel 270 4th shut-off valve 261, and the 3rd pipeline of the thermal medium output terminal close to heat exchanger 240 is connected on circulating reflux pipeline 260 5, the 3rd pipeline 5 is equipped with the second blow valve 510, and the fluid media (medium) of the thermal medium output terminal output of heat exchanger 240 is through the 3rd pipe It discharges in road 5.
During 2 normal operation of liquefying plant, source of the gas by recycle compressor 210 into cooling device input terminal, specially into Enter the plenum 221 of booster expansion machine 220；Liquid medium after cooling liquefaction, which is exported by the output terminal of cooling device to liquid, to be stored up Cryopreservation device 250 is specially exported by the cold medium output terminal of heat exchanger 240；And during cooling device works, supercharging is swollen The cryogenic gas that the bulge 222 of swollen machine 220 exports is the refrigerant source in heat exchanger 240, i.e. bulge 222 must be to heat exchange 240 transporting low temperature gas of device, and cryogenic gas exchanges heat after heating up from the thermal medium of heat exchanger 240 in heat exchanger 240 and export End output and circulating reflux is to recycle compressor 210.But during the auxiliary startup of air separation plant 1 of liquefying plant 2, recycle compressor 210 do not work, so the gas by the output of 240 thermal medium output terminal of heat exchanger is needed to diffuse, to ensure cooling device Normal operation.As for specifically diffusing mode, can have but be not limited to following two situations：
Since circulating reflux pipeline 260 is connected with the medium input channel 270 of liquefying plant 2, and medium input channel 270 It can necessarily be in communication with the outside, therefore the gas of the thermal medium output terminal output of heat exchanger 240 can be directly through being recycled back to flow tube Road 260 and medium input channel 270 are diffused in external environment, so the transformation smaller to existing apparatus, it is easier to be implemented；Or Person
Threeth pipeline 5 of the connection with the second blow valve 510 on medium back flow pipeline, will heat exchange by the 3rd pipeline 5 The gas of the thermal medium output terminal output of device 240 is diffused into external environment, while for the normal fortune for ensureing liquefying plant 2 Row, need to set the 4th shut-off valve 261 on circulating reflux pipeline 260, the 4th shut-off valve 261 be located at medium input channel 270 and Between 3rd pipeline 5, when starting air separation plant 1, the 4th shut-off valve 261 is closed, the second blow valve 510 is opened, when space division is set When standby 1 startup finishes, the 4th shut-off valve 261 is opened, the second blow valve 510 is closed, can equally achieve the object of the present invention, Within the scope of the present invention.
Further, as shown in Figure 1, material processing device includes raw material air compressor machine 10 and molecular sieve adsorber 20, point The input terminal of son sieve absorber 20 is connected with the output terminal of raw material air compressor machine 10, the output terminal and raw material of molecular sieve adsorber 20 The output terminal of processing unit is connected.
Material processing device includes raw material air compressor machine 10 and molecular sieve adsorber 20, and raw material air compressor machine 10 can be empty by raw material Air pressure is condensed to the air with certain pressure, molecular sieve adsorber 20 can by compressed air water vapour, titanium dioxide The ingredient harmful to air separation plant 1 and liquefying plant 2 such as carbon, acetylene, propylene, propane and nitrous oxide is got rid of, and obtains drying Clean air is used for air separation plant 1 and liquefying plant 2, to ensure the normal operation of air separation plant 1 and liquefying plant 2.
It is understood that broken string occurs in the position of some pipeline monitors in attached drawing 1 and attached drawing 2, it is intended merely to illustrate This two pipelines are not connections rather than represent that a certain pipeline is disconnected at the position.
In the above-described embodiments, as shown in Fig. 2, the first control unit includes the first shut-off valve 310；Second control unit bag Include the second shut-off valve 410.
Preferably, as shown in Fig. 2, the first control unit further includes the 3rd shut-off valve 320 and the first blow valve 330, the 3rd Shut-off valve 320 is disposed adjacent with the first shut-off valve 310, and the first blow valve 330 is located at the first shut-off valve 310 and the 3rd shut-off valve Between 320.
First shut-off valve 310 in first pipe 3 is set, the second shut-off valve 410 is set on second pipe 4, passes through The break-make of one shut-off valve 310 and the second shut-off valve 410 can effectively control the break-make of first pipe 3 and second pipe 4, structure letter It is single, and control reliable.Specifically, when starting air separation plant 1, the first shut-off valve 310 and the second shut-off valve 410 is opened, and is started The cooling device of liquefying plant 2, you can utilize 2 assistant starting air separation plant 1 of liquefying plant；When air separation plant 1 is substantially finished During startup, the first shut-off valve 310 and the second shut-off valve 410 are closed, and closes the cooling device of liquefying plant 2, makes air separation plant 1 It can normally be produced according to respective production process with liquefying plant 2.
First control unit further includes the 3rd shut-off valve 320 and the first blow valve 330, i.e., set in first pipe 3 there are two Shut-off valve and a blow valve, be so in order to ensure air separation plant 1 start after first pipe 3 can reliably cut off, with The leakage of first pipe 3 air during normal work is avoided to pollute the fluid media (medium) in liquefying plant 2.Specifically, start empty During subset 1, the first shut-off valve 310 and the second shut-off valve 410 are opened, the first blow valve 330 is closed, to realize first pipe 3 Conducting；When the startup of air separation plant 1 finishes, the first shut-off valve 310 and the second shut-off valve 410 are closed, opens the first blow valve 330, to check whether first pipe 3 leaks, convenient for taking measures in time.
What deserves to be explained is due to normal work when, second pipe 4 both ends flowing be all high-purity fluid be situated between Matter, the risk of pollution is smaller, so a shut-off valve need to be only set.
In the above-described embodiments, the outside of first pipe 3 and the outside of second pipe 4 are enclosed with thermal insulation material.
Preferably, the thermal insulation material of the external package of first pipe 3 is mineral material；The external package of second pipe 4 Thermal insulation material is polyurethane foam material.
In first pipe 3 and the external package thermal insulation material of second pipe 4, first pipe 3 and second pipe 4 can be reduced In fluid media (medium) loss of refrigeration capacity, so as to improve the utilization rate of cold, further shorten air separation plant 1 the startup time.
Wherein, in the external package general mineral material of heat-insulating property of first pipe 3, it is certainly not limited to mineral wool material Material is because what is flowed in first pipe 3 is the air of material processing device output, this partial air simply have passed through cooling tower Preliminary precooling, thus temperature is not especially low, therefore is kept the temperature using common mineral material；And in second pipe 4 What is flowed is then the air that cooling device deep refrigerating is crossed, and the temperature of this partial air is for being delivered to space division than relatively low Equipment 1 starts what is used for air separation plant 1, so the relatively good polyurethane foam material of heat-insulating property need to be used, certainly It can be the preferable thermal insulation material of other heat-insulating properties, could effectively reduce loss of refrigeration capacity.
What deserves to be explained is since first pipe 3 is fully located at outside ice chest, so entire pipeline is required for package thermal insulating material Material；And second pipe 4 may partly be located in ice chest, it, need to be since the temperature in ice chest is very low, therefore only partly outside ice chest Portion envelops thermal insulation material outside ice chest.
In the above-described embodiments, liquefying plant 2 is single expansion liquefying plant 2 with refrigerator 230；Or, liquefying plant 2 is High-low pressure twin-stage expands liquefying plant 2, and the cooling device of high-low pressure twin-stage expansion liquefying plant 2 includes two booster expansion machines 220, it is respectively low-pressure stage booster expansion machine 220 and hiigh pressure stage booster expansion machine 220, and when air separation plant 1 starts, only low pressure Grade booster expansion machine 220 starts.
Liquefying plant 2 is single expansion liquefying plant 2 with refrigerator 230, i.e., cooling device, which only includes one, increases expansion Machine, but refrigerator 230 is also associated between booster expansion machine 220 and heat exchanger 240, refrigerator 230 can further improve cold But device is conveyed to the cold of air separation plant 1, so as to further shorten the startup time of air separation plant 1.
Liquefying plant 2 expands liquefying plant 2 for high-low pressure twin-stage, only uses its low-pressure stage expanding machine to aid in air separation plant 1 start be because metallurgy type air separation plant 1 it is most of be all low-pressure flow, so the only gas of low-pressure stage expanding machine output Pressure matches with air separation plant 1.
Certainly, the species of liquefying plant 2 is varied, it is not limited to and above-mentioned two situations will not enumerate herein, As long as it is understood by those skilled in the art that using the cooling device of liquefying plant 2 air separation plant 1 is aided in freeze, Meet the design philosophy and objective of the application, thus should all be in the protection domain of the application.
In the above-described embodiments, as shown in Figure 1, the pipeline that backflows includes nitrogen return tube 71, oxygen return tube 72 and dirty nitrogen Return tube, one end of second pipe 4 are connected in nitrogen return tube 71.
One end of second pipe 4 is connected in nitrogen return tube 71, is because compared with other return tubes, nitrogen returns The input terminal of flow tube 71 is located at the top of upper tower 63, and by the safety valve pipeline cooling box of upper 63 top of tower, so for For the unit for having air separation plant 1 and liquefying plant 2, can second pipe 4 be directly connected to safety valve pipeline cooling box On pipe, so it is convenient to carry out, and investment reduction；As for the other end of second pipe 4, due to the ice chest of liquefying plant 2 Very little directly takes off sand transformation.Certainly, for the unit for creating air separation plant 1 and liquefying plant 2, this can be utilized Application directly sets this pipeline in ice chest, is preferably made in the ice chest of the ice chest of air separation plant 1 and liquefying plant 2 same mixed It is embedded on solidifying earth foundation or even by liquefying plant 2 in the ice chest of air separation plant 1, it so can be with specific aim optimization design pipeline. And for first pipe 3, since it is outside ice chest, so easily transformation.
Certainly, it will be understood by those of skill in the art that when starting due to air separation plant 1, the fluid media (medium) of circulation is all Air, and collected without output of products, therefore one end of second pipe 4 can also be connected to oxygen return tube 72 or dirty nitrogen backflows On pipe 73 or the pipeline that ought backflow further includes the return tube of other media, such as during argon gas return tube, can also be connected to these Return tube is on the pipeline of heat-exchanger rig 40, if the matching of pressure rating is considered, and it is dirty to take product when preventing operation The measure of dye, be just attained by shorten air separation plant 1 start the time effect, and its basic principle be it is the same, herein no longer It enumerates, but is within the scope of protection of the invention.
In the above-described embodiments, air separation plant 1 is the air separation plant 1 of external compression flow.
Compared with the air separation plant 1 of Internal-compression flow, the air separation plant 1 of external compression flow since liquid need not be produced, 30 refrigerating capacity of turbo-expander of configuration is relatively smaller, it is only necessary to supplement cold damage during normal production, cause the available machine time It is longer, therefore its startup is aided in using liquefying plant 2, there is more significant energy-saving significance.Certainly, the space division of Internal-compression flow Equipment 1 can also aid in its starting up using liquefying plant 2, and can equally play and shorten the available machine time to save energy consumption Purpose.
Space division system provided by the invention is described in detail with reference to some specific embodiments of the present invention.
Embodiment one
As depicted in figs. 1 and 2, air separation plant 1 for full low pressure, the air separation plant 1 of external compression flow, output be nitrogen, Oxygen and dirty nitrogen, liquefying plant 2 expand liquefying plant 2, the gas that backflows that liquefying plant 2 exports for the nitrogen list with refrigerator 230 It is connected to the nitrogen return tube 71 on the top of tower 63.
Wherein, as shown in Figure 1, air separation plant 1 include material processing device, refrigerating plant, heat-exchanger rig 40, rectifying column, Backflow pipeline and medium output channel, and principle processing unit includes raw material air compressor machine 10 and molecular sieve adsorber 20, refrigerating plant Including two turbo-expanders 30, heat-exchanger rig 40 is main heat exchanger 240, backflows and is also connected between pipeline and main heat exchanger 240 Subcooler 50, rectifying column include lower tower 61, main condenser evaporator 62 and upper tower 63, and the pipeline that backflows includes nitrogen return tube 71, oxygen Gas return tube 72 and dirty nitrogen return tube 73, medium output channel include nitrogen efferent duct 81, oxygen output tube 82 and dirty nitrogen output Pipe 83, and nitrogen return tube 71 is connected with nitrogen efferent duct 81, oxygen return tube 72 is connected with oxygen output tube 82, dirty nitrogen Return tube 73 is connected with dirty nitrogen efferent duct 83.
Specifically, as shown in Figure 1, the output terminal of raw material air compressor machine 10 is connected with the input terminal of molecular sieve adsorber 20, point The output terminal of son sieve absorber 20 and the input terminal of the plenum of the thermal medium input terminal and turbo-expander 30 of main heat exchanger 240 Be connected, the cold medium output terminal of main heat exchanger 240 is connected with the lower tower 61 of rectifying column, the bulge of turbo-expander 30 it is defeated Outlet is connected with the upper tower 63 of rectifying column, and the input terminal for the pipeline that backflows is connected with the medium output terminal of rectifying column, and backflow pipeline Output terminal is connected with the cold medium input terminal of heat-exchanger rig 40, thermal medium output terminal and the medium output channel phase of heat-exchanger rig 40 Even.
When air separation plant 1 works normally, the dried and clean air exported by material processing device is divided into two-way, enters all the way In heat-exchanger rig 40, with the cryogenic media (low temperature nitrogen, cryogenic oxygen, low temperature dirt nitrogen) in the pipeline input heat-exchanger rig 40 that backflows Enter the lower tower 61 of rectifying column after heat exchange cooling；Another way enters in refrigerating plant, in refrigerating plant after deep refrigerating cooling Into the upper tower 63 of rectifying column；Upper tower 63 and lower tower 61 are engaged, and it is dirty to divide air into low temperature nitrogen, cryogenic oxygen and low temperature Nitrogen, and exported from the medium output terminal of upper tower 63；Low temperature nitrogen, cryogenic oxygen and the low temperature dirt nitrogen of output respectively enter nitrogen and return Flow tube 71, oxygen return tube 72 and dirty nitrogen return tube 73, then flow to heat-exchanger rig 40, in heat-exchanger rig 40 with air heat-exchange It is exported afterwards by thermal medium output terminal to corresponding nitrogen efferent duct 81, oxygen output tube 82 and dirty nitrogen efferent duct 83.
As shown in Fig. 2, liquefying plant 2 includes medium input channel 270, recycle compressor 210, cooling device, is recycled back to Flow tube road 260 and liquid storaging device 250, cooling device include booster expansion machine 220, refrigerator 230 and heat exchanger 240；Its In, medium input channel 270 is nitrogen input channel, and recycle compressor 210 is Xun Huan nitrogen compressor, and liquid storaging device 250 is Liquid nitrogen storage tank, heat exchanger 240 are liquefaction plate heat exchanger 240.
Specifically, as shown in Fig. 2, medium input channel 270 and the input terminal of recycle compressor 210 and circulating reflux pipeline 260 one end is connected, and the output terminal of recycle compressor 210 is connected with the input terminal of the plenum 221 of booster expansion machine 220, The output terminal of plenum 221 and the thermal medium input terminal of heat exchanger 240 and the input terminal of the bulge 222 of booster expansion machine 220 Be connected, the output terminal of bulge 222 is connected with the cold medium input terminal of heat exchanger 240, the thermal medium output terminal of heat exchanger 240 and The other end of circulating reflux pipeline 260 is connected, and the cold medium output terminal of heat exchanger 240 is connected with liquid storaging device 250, and increases Refrigerator 230 is also connected between splenium 221 and bulge 222.
When liquefying plant 2 works normally, nitrogen enters liquefying plant 2 by medium input channel 270, is pressed subsequently into Xun Huan Contracting machine 210 carries out first-time compression in recycle compressor 210, subsequently into booster expansion machine 220 plenum 221 carry out it is secondary Compression, subsequently into heat exchanger 240；Nitrogen into heat exchanger 240 is divided into two-way, swollen into being pressurized after preliminary cooling all the way The bulge 222 of swollen machine 220 carries out deep refrigerating, and heat exchanger 240 is returned again after deep refrigerating, in heat exchanger 240 with it is another Road nitrogen heat exchange enables the fully heat exchange cooling in heat exchanger 240 of another way fluid media (medium) to become liquid nitrogen by heat exchanger 240 Cold medium output terminal exports, and the low-pressure nitrogen exported after exchanging heat by the thermal medium output terminal of heat exchanger 240 is through being recycled back to flow tube Road 260 is back to the input terminal of recycle compressor 210, into Xun Huan pressure behind the nitrogen interflow inputted with medium input channel 270 Contracting machine 210 continues to compress；And it is then stored by the liquid nitrogen that 240 cold medium output terminal of heat exchanger exports into liquid storaging device 250.
Next, make appropriate reconstruction to air separation plant 1 and liquefying plant 2, to obtain can quickly starting for the application Space division system, specially：
Step 1：The outlet of 1 molecular sieve adsorber 20 of air separation plant and 2 plenum 221 of liquefying plant inlet tube it Between connect first pipe 3, the dried and clean air that the material processing device of air separation plant 1 processes is enable to enter liquefying plant 2 cooling device；And two shut-off valves and blow valve (the first shut-off valve the 310, the 3rd cut-off are set in first pipe 3 320 and first blow valve 330 of valve), to ensure that first pipe 3 can reliably be cut off after air separation plant 1 starts；The pipeline Outside is enclosed with mineral material heat preservation.Since first pipe 3 is all outside ice chest, so easily transformation.
Step 2：It is fixed in the cold medium output terminal of the plate heat exchanger 240 of liquefying plant 2 and tower 63 on air separation plant 1 Second pipe 4 is connected between nitrogen return tube 71, the Cryogenic air that liquefying plant 2 exports is enable to be carried out into air separation plant 1 Heat exchange, air separation plant 1 to be aided in start；And a shut-off valve (the second shut-off valve 410) is set on second pipe 4, to ensure Second pipe 4 can be cut off after air separation plant 1 starts；The portion envelops that the pipeline is located at outside ice chest have polyurethane foam Material is kept the temperature.
For the unit of newly-built air separation plant 1 and liquefying plant 2, this connecting pipeline can be directly set in ice chest, it is best Among being made on same concrete foundation by air separation cooling box and liquefaction ice chest or even liquefying plant 2 be embedded in air separation cooling box, It so can be with specific aim optimization design pipeline.
For having the unit of air separation plant 1 and liquefying plant 2, for convenience of implementation and investment reduction, upper tower can be utilized Second pipe 4 is connected to upper tower 63 and pushed up on the pipe of safety valve cooling box by 63 safety valve pipeline, and the ice chest of liquefying plant 2 Very little directly takes off sand transformation.
Step 3：It is connect on the circulating reflux pipeline 260 of the thermal medium output terminal of the plate heat exchanger 240 of liquefying plant 2 The 3rd pipeline 5 of the second blow valve 510 is connected with, to diffuse low-pressure air.
Step 4：It checks and whether there is shut-off valve on circulating reflux pipeline 260, if not provided, adding (the 4th section of a shut-off valve Only valve 261).
So far, the transformation of air separation plant 1 and liquefying plant 2 is completed.During specific startup air separation plant 1, as follows Operation：
Step 1：The outlet valve of note Xun Huan nitrogen compressor is the 5th shut-off valve 211, closes the terminal valve of Xun Huan nitrogen compressor Door closes the 4th shut-off valve 261 and the 5th shut-off valve 211；
Step 2：When air separation plant 1 starts, the original of air compressor machine affluence is diffused into compressed air and is sent by first pipe 3 To liquefying plant 2, start 220 auxiliary cooling of refrigerator 230 and booster expansion machine of liquefying plant 2, then sent by second pipe 4 Cold is recycled to air separation plant 1；
Step 3：To air separation plant 1 main condenser evaporator 62 liquid level close to working depth when, close liquefying plant 2 Turbine boosting machine and refrigerator 230；
Step 4：First pipe 3 and second pipe 4 are cut off, that is, closes the first shut-off valve 310, the second shut-off valve 410, the Three shut-off valves 320 open the first blow valve 330, and cut off the 3rd pipeline 5, that is, close the second blow valve 510.
Remaining is by the operation of the former method of air separation plant 1 and liquefying plant 2.
When air separation plant 1 starts, raw air can be processed into the air output of dried and clean by material processing device, A portion air, into the cooling device of liquefying plant 2, is cooled to cryogen by first pipe 3 in cooling device The nitrogen return tube 71 of air separation plant 1 is delivered to by second pipe 4 afterwards, air separation plant 1 is entered by nitrogen return tube 71 Cold is contributed by main heat exchanger 240 in main heat exchanger 240, is used for 1 startup stage of air separation plant, since cooling fills The refrigerating capacity put is very big, so the cold of supply air separation plant 1 is also considerable, so as to greatly shorten air separation plant 1 Start the time, save the considerable energy.When air separation plant 1 main condenser evaporator 62 liquid level close to working depth, i.e. space division When equipment 1 has substantially been completed to start, first pipe 3 and second pipe 4 are cut off, simultaneously closes off the cooling dress of liquefying plant 2 It puts, air separation plant 1 can work normally.
So the essence of the present embodiment is：It is dry empty all the way in the output termination of the raw material output device of air separation plant 1 Air pipe is to the cooling device of liquefying plant 2, while the output termination cryogen pipe all the way of the cooling device in liquefying plant 2 Backflowing on pipeline near to 1 rectifying column of air separation plant, in such manner, it is possible to for 1 startup stage of air separation plant provide cold just not The simply refrigerating plant (generally turbo-expander 30) of air separation plant 1, further includes the cooling device of liquefying plant 2, and by To be far longer than the refrigerating plant of air separation plant 1 in the refrigerating capacity of the cooling device of liquefying plant 2, so to air separation plant 1 The startup time plays decisive influence, so as to substantially reduce the startup time of air separation plant 1, and then has significantly saved the energy Consumption, can have an immense impact on to industries such as metallurgy, new era of the industries such as developing metallurgy.
During due to 2 normal use of liquefying plant, freezed using the nitrogen of the compression of recycle compressor 210, and followed Energy consumption when ring compressor 210 is run is also very big；And the application using liquefying plant 2 aid in air separation plant 1 start when, liquid It is the air that is processed using the material processing device of air separation plant 1 to freeze that makeup, which puts 2, since air separation plant 1 opens When dynamic, material processing device is centainly in operating status, so the partial air supply liquefying plant 2 processed, both The utilization rate of its own air processed is improved, in turn avoids the fortune of the high-power recycle compressor 210 of liquefying plant 2 Row, thus also it is saved greatly the energy.
Two (not shown) of embodiment
Difference lies in liquefying plant 2 expands liquefying plant 2 for oxygen list, that is, utilizes the liquefaction of oxygen with embodiment one Device 2 aids in air separation plant 1 to start, and the gas that backflows of second pipe 4 is connected to oxygen return tube 72 (can certainly be connected to nitrogen Return tube 71 or dirty nitrogen return tube 73).Correspondingly, the medium input channel 270 of liquefying plant 2 is oxygen input tube road, Xun Huan Compressor 210 is Xun Huan oxygen compressor, and liquid storaging device 250 is liquid oxygen vessel, when equally also shortening the startup of air separation plant 1 Between, and its basic principle is identical with embodiment one, details are not described herein.
Three (not shown) of embodiment
Difference lies in liquefying plant 2 expands liquefying plant 2, the second pipe for the high-low pressure twin-stage of nitrogen with embodiment one The gas that backflows in road 4 is connected to the nitrogen return tube 71 of tower 63, but when air separation plant 1 is aided in start, only opens low-pressure stage and increase Compression swelling machine 220 is matched with air separation plant 1 with the gas pressure for ensureing input air separation plant 1, it is empty equally also to have reached shortening Subset 1 starts the effect of time, and basic principle is also the same, and details are not described herein.
Example IV (not shown)
Difference lies in air separation plant 1 and liquefying plant 2 are newly-built equipment, and backflowing for second pipe 4 connects with embodiment one Access point is located in dirty nitrogen return tube 73, this is the refrigerating capacity (i.e. liquefying power) according to liquefying plant 2, by more accurately counting It calculates, what operating parameter when being freezed with raw air obtained, equally also achieve the effect that shortening air separation plant 1 starts the time, And basic principle is also the same, details are not described herein.
To sum up, space division system provided by the invention, using the cooling device of liquefying plant 2 come auxiliary cooling, due to liquefaction Device 2 needs to produce liquid, so the refrigerating capacity of its cooling device is very big, so as to greatly shorten the startup of air separation plant 1 Time, and then the energy consumption of the industries such as metallurgy is significantly reduced, realize energy saving purpose；Meanwhile the present invention is different from normally Liquefying plant 2 is freezed using the source of the gas of recycle compressor 210, but the material processing device of air separation plant 1 make use of to diffuse Air freeze, both improved the utilization rate of the air of material processing device processing, also saved when liquefying plant 2 freezes Energy consumption, thus the energy is also greatly saved.
Further, since the gas consumer interruption of smelter uses, but mating air separation plant 1 is continuous production , in order to reduce the waste of diffusing of gas products, relevant enterprise is generally equipped with individual liquefying plant 2, by gas more than needed Body product liquefied storage.And before air separation plant 1 normally starts, due to still without the qualified gas products of production, liquid It is often also what is stopped transport that makeup, which puts 2, can just be utilized to auxiliary cooling.Therefore, the technical program only need to be to existing sky Subset 1 and liquefying plant 2 are slightly transformed, you can achieve the purpose that shortening air separation plant 1 starts the time, and then generation can The energy-saving effect of sight, convenient for promoting, and with extraordinary application prospect.
In the present invention, term " first ", " second ", " the 3rd ", " the 4th ", " the 5th " are only used for the purpose described, and It is not intended that instruction or hint relative importance；Term " multiple " then refers to two or more, unless otherwise specific limit It is fixed.The terms such as term " installation ", " connected ", " connection ", " fixation " should all be interpreted broadly, for example, " connection " can be fixed It connects or is detachably connected or is integrally connected；" connected " can be directly connected, and can also pass through intermediary It is indirectly connected.For the ordinary skill in the art, above-mentioned term can be understood as the case may be in the present invention Concrete meaning.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc. Mean to combine at least one reality that the particular features, structures, materials, or characteristics that the embodiment or example describe are contained in the present invention It applies in example or example.In the present specification, schematic expression of the above terms is not necessarily referring to identical embodiment or reality Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more embodiments or example with Suitable mode combines.
It these are only the preferred embodiment of the present invention, be not intended to limit the invention, for those skilled in the art For member, the invention may be variously modified and varied.Any modification within the spirit and principles of the invention, being made, Equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.

Claims (11)

1. a kind of space division system, which is characterized in that including：
Air separation plant, including material processing device, heat-exchanger rig and the pipeline that backflows, the material processing device can export drying Clean air, the output terminal of the pipeline that backflows are connected with the cold medium input terminal of the heat-exchanger rig；
First pipe and second pipe, one end of the first pipe are connected with the output terminal of the material processing device, and The first pipe is equipped with to control the first control unit of the first pipe break-make；One end of the second pipe with The pipeline that backflows is connected, and the second pipe is equipped with to control the second of the second pipe break-make to control list Member；
Liquefying plant, including cooling device, the input terminal of the cooling device is connected with the other end of the first pipe, institute The output terminal for stating cooling device is connected with the other end of the second pipe；
Wherein, when the air separation plant is activated, first control unit controls the first pipe conducting, and described second Control unit controls the second pipe conducting.
2. space division system according to claim 1, which is characterized in that
First control unit includes the first shut-off valve；
Second control unit includes the second shut-off valve.
3. space division system according to claim 2, which is characterized in that
First control unit further includes the 3rd shut-off valve and the first blow valve, the 3rd shut-off valve and the described first cut-off Valve is disposed adjacent, and first blow valve is between first shut-off valve and the 3rd shut-off valve.
4. space division system according to claim 1, which is characterized in that
The outside of the first pipe and the outside of the second pipe are enclosed with thermal insulation material.
5. space division system according to claim 4, which is characterized in that
The thermal insulation material of the external package of the first pipe is mineral material；
The thermal insulation material of the external package of the second pipe is polyurethane foam material.
6. space division system according to any one of claim 1 to 5, which is characterized in that
The cooling device includes booster expansion machine and heat exchanger, and the booster expansion machine includes plenum and bulge, described The input terminal of plenum is connected with the input terminal of the cooling device, the heat of the output terminal of the plenum and the heat exchanger The input terminal of medium input terminal and the bulge is connected, and the cold medium of the output terminal and the heat exchanger of the bulge is defeated Enter end to be connected, the cold medium output terminal of the heat exchanger is connected with the output terminal of the cooling device；
Wherein, when the air separation plant is activated, the thermal medium output terminal of the heat exchanger is connected with the external world, for diffuse from The fluid media (medium) of the thermal medium output terminal output of the heat exchanger.
7. space division system according to claim 6, which is characterized in that
Circulating reflux pipeline is equipped between the medium input channel of the liquefying plant and the thermal medium output terminal of the heat exchanger；
The fluid media (medium) of the thermal medium output terminal output of the heat exchanger is defeated followed by the circulating reflux pipeline, the medium It is discharged after entering pipeline；Or, the circulating reflux pipeline is equipped with the 4th shut-off valve close to the medium input channel, and it is described The 3rd pipeline of the thermal medium output terminal close to the heat exchanger is connected on circulating reflux pipeline, the 3rd pipeline is equipped with Second blow valve, the fluid media (medium) of the thermal medium output terminal output of the heat exchanger are discharged through the 3rd pipeline.
8. space division system according to claim 6, which is characterized in that
The liquefying plant is single expansion liquefying plant with refrigerator；Or
The liquefying plant expands liquefying plant, the cooling device of the high-low pressure twin-stage expansion liquefying plant for high-low pressure twin-stage It is respectively low-pressure stage booster expansion machine and hiigh pressure stage booster expansion machine, and the space division is set including two booster expansion machines During standby startup, only described low-pressure stage booster expansion machine starts.
9. space division system according to any one of claim 1 to 5, which is characterized in that
The material processing device includes raw material air compressor machine and molecular sieve adsorber, the input terminal of the molecular sieve adsorber and institute The output terminal for stating raw material air compressor machine is connected, the output terminal of the output terminal of the molecular sieve adsorber and the material processing device It is connected.
10. space division system according to any one of claim 1 to 5, which is characterized in that
The pipeline that backflows includes nitrogen return tube, oxygen return tube and dirty nitrogen return tube, one end connection of the second pipe On to the nitrogen return tube.
11. space division system according to any one of claim 1 to 5, which is characterized in that
The air separation plant is the air separation plant of external compression flow.
CN201611022494.9A 2016-11-17 2016-11-17 Air separation system Expired - Fee Related CN108072235B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110645769A (en) * 2019-09-22 2020-01-03 浙江智海化工设备工程有限公司 Nitrous oxide low-temperature recovery method
CN111238167A (en) * 2020-03-17 2020-06-05 北京科技大学 Energy-saving heating device and method for air separation device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60194272A (en) * 1984-03-13 1985-10-02 日本酸素株式会社 Method of starting air separator utilizing chilliness of liquefied natural gas
JPH09217982A (en) * 1996-02-09 1997-08-19 Nippon Sanso Kk Method for liquefying and separating air and apparatus therefor
JP2004003724A (en) * 2002-05-31 2004-01-08 Jfe Steel Kk Cooling method of cryogenic equipment
CN2766203Y (en) * 2005-04-15 2006-03-22 林福粦 Air separator for recovering cold energy of liquefied natural gas
CN1979069A (en) * 2005-12-08 2007-06-13 新余钢铁有限责任公司 Device for liquified recovering nitrogen, oxygen product in nitrogen expansion circulation
CN201377961Y (en) * 2008-09-09 2010-01-06 苏州制氧机有限责任公司 Multi-operating mode air separation equipment
CN101684982A (en) * 2008-09-28 2010-03-31 鞍钢股份有限公司 Air separation equipment hot state starting method
CN105486033A (en) * 2015-12-11 2016-04-13 武汉钢铁(集团)公司 Cold starting system of air separation unit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60194272A (en) * 1984-03-13 1985-10-02 日本酸素株式会社 Method of starting air separator utilizing chilliness of liquefied natural gas
JPH09217982A (en) * 1996-02-09 1997-08-19 Nippon Sanso Kk Method for liquefying and separating air and apparatus therefor
JP2004003724A (en) * 2002-05-31 2004-01-08 Jfe Steel Kk Cooling method of cryogenic equipment
CN2766203Y (en) * 2005-04-15 2006-03-22 林福粦 Air separator for recovering cold energy of liquefied natural gas
CN1979069A (en) * 2005-12-08 2007-06-13 新余钢铁有限责任公司 Device for liquified recovering nitrogen, oxygen product in nitrogen expansion circulation
CN201377961Y (en) * 2008-09-09 2010-01-06 苏州制氧机有限责任公司 Multi-operating mode air separation equipment
CN101684982A (en) * 2008-09-28 2010-03-31 鞍钢股份有限公司 Air separation equipment hot state starting method
CN105486033A (en) * 2015-12-11 2016-04-13 武汉钢铁(集团)公司 Cold starting system of air separation unit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
钱立新: ""空分装置启动时几个问题的分析和探讨"", 《冶金动力》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110645769A (en) * 2019-09-22 2020-01-03 浙江智海化工设备工程有限公司 Nitrous oxide low-temperature recovery method
CN111238167A (en) * 2020-03-17 2020-06-05 北京科技大学 Energy-saving heating device and method for air separation device
CN111238167B (en) * 2020-03-17 2024-04-16 北京科技大学 Energy-saving heating device and method for air separation device

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