CN201265997Y - Liquid air separation plant - Google Patents

Liquid air separation plant Download PDF

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Publication number
CN201265997Y
CN201265997Y CNU2008201858236U CN200820185823U CN201265997Y CN 201265997 Y CN201265997 Y CN 201265997Y CN U2008201858236 U CNU2008201858236 U CN U2008201858236U CN 200820185823 U CN200820185823 U CN 200820185823U CN 201265997 Y CN201265997 Y CN 201265997Y
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CN
China
Prior art keywords
air
tower
output
input
liquid
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Application number
CNU2008201858236U
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Chinese (zh)
Inventor
夏瑞田
蒋彬
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苏州制氧机有限责任公司
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Priority to CNU2008201858236U priority Critical patent/CN201265997Y/en
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Publication of CN201265997Y publication Critical patent/CN201265997Y/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04248Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04278Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using external refrigeration units, e.g. closed mechanical or regenerative refrigeration units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04248Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04333Generation 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
    • F25J3/04339Generation 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 air
    • F25J3/04345Generation 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 air and comprising a gas work expansion loop
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes 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
    • F25J3/04Processes 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
    • F25J3/04406Processes 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
    • F25J3/04412Processes 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00Refrigeration techniques used
    • F25J2270/90External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration

Abstract

The utility model discloses a liquid air separation plant which comprises an air compressor, a molecular sieve purification device, a booster expansion turbine, a rectifying tower, a subcooler and a heat exchanger, wherein the air compressor compresses outside air, the molecular sieve purification device purifies air outputted by the air compressor, the booster expansion turbine expands and refrigerates the purified air, the rectifying tower separates the air which passes through the booster expansion turbine, the subcooler subcools partial gas and liquid which are transmitted outside the rectifying tower, and the heat exchanger enables air in the air separation plant to carry out heat change. The booster expansion turbine comprises a positive booster and an expansion machine which are coaxially arranged at different ends, the rectifying tower comprises an upper tower and a lower tower, the bottom of the upper tower is provided with a main condenser evaporator, a recycle compressor is arranged between the booster expansion turbine and the molecular sieve purification device, and a refrigeration plant is arranged between the positive booster and the expansion machine. By the separation of the rectifying tower of the liquid air separation plant, loxygen and liquid nitrogen can be directly got. Compared with an air separation plant and a liquefying plant which are normally separated, the utility model has small plant volume and floor space and high automation level.

Description

The liquia air separation equipment

Technical field

The utility model relates to a kind of liquia air separation equipment.

Background technology

The liquia air separation equipment is a kind of modification of air separation equipment.The major product of air separation equipment is oxygen and nitrogen.Oxygen is the material that all lived bodies are depended on for existence on the earth, and it is easy to and other material generation oxidation reactions, and emits a large amount of heats.Therefore, oxygen is used widely in departments such as metallurgy, chemical industry, the energy, machinery, national defense industry as oxidant and combustion adjuvant.The chemical property torpescence of nitrogen has very big inertia under usual state, be not easy and other material generation chemical reaction.Therefore, nitrogen is used for doing protection gas widely in metallurgical, electron chemistry is industrial.And cryogenic liquid has superiority at storage and transporter mask, so the demand of low temperature liquid nitrogen and liquid oxygen is more and more, and the air separation by routine adds that liquefaction process takes up an area of greatly, complex process.And the liquia air separation equipment has air separation and liquefaction function concurrently, so its application prospect is boundless.

Summary of the invention

The utility model purpose provides a kind of liquia air separation equipment, supercharging aftercooler and low temperature ice maker are set behind supercharger, make the air direct liquefaction become liquid air to enter rectifying column, rectifying column separates can directly obtain liquid oxygen and liquid nitrogen, adding liquefaction equipment with air separation equipment that routine is separated compares, the utility model equipment volume is little, and floor space is little, the automatization level height.

The technical solution of the utility model is: a kind of liquia air separation equipment, comprise the air compressor that extraneous air is compressed, the molecular sieve purification device that the air that air compressor is exported purifies, to carry out the turbine boosting expansion gear of swell refrigeration through the air that purifies, will be through the rectifying column of the air separation of turbine boosting expansion gear, the heat exchanger that the part gas-liquid that rectifying column is transmitted outside tower carried out cold subcooler and carried out heat exchange for the gas in the air separation equipment, described turbine boosting expansion gear comprises supercharger and the decompressor that coaxial heterodoxy is provided with, described rectifying column comprises Shang Ta and Xia Ta, the described tower bottom of going up is provided with the main condenser evaporimeter, be provided with recycle compressor between described turbine boosting expansion gear and the molecular sieve purification device, be provided with cooling device between described supercharger and the decompressor.

The further technical scheme of the utility model is: a kind of liquia air separation equipment, comprise the air compressor that extraneous air is compressed, the molecular sieve purification device that the air that air compressor is exported purifies, to carry out the turbine boosting expansion gear of swell refrigeration through the air that purifies, will be through the rectifying column of the air separation of turbine boosting expansion gear, the heat exchanger that the part gas-liquid that rectifying column is transmitted outside tower carried out cold subcooler and carried out heat exchange for the gas in the air separation equipment, described turbine boosting expansion gear comprises supercharger and the decompressor that coaxial heterodoxy is provided with, described rectifying column comprises Shang Ta and Xia Ta, the described tower bottom of going up is provided with the main condenser evaporimeter, be provided with recycle compressor between described turbine boosting expansion gear and the molecular sieve purification device, be provided with cooling device between described supercharger and the decompressor.

Described cooling device comprises supercharging aftercooler behind the supercharger and the low temperature ice maker between supercharging aftercooler and the decompressor.

A branch of the output of described molecular sieve purification device is communicated with the bottom of following tower through behind the heat exchanger, and another branch links to each other with the input of recycle compressor; The output of described supercharging aftercooler links to each other with the input of low temperature ice maker through behind the heat exchanger, and the output of described low temperature ice maker links to each other with the input of decompressor through branch behind the heat exchanger, and another branch is connected to the Xia Ta bottom behind choke valve; The output of decompressor links to each other with the input of recycle compressor through behind the heat exchanger.

Described air separation equipment also comprises liquid nitrogen storage tank and liquid oxygen storage tank; The described liquid air of tower bottom down is input to the middle part of tower behind subcooler and choke valve, the described pure nitrogen gas of top of tower down is liquefied as liquid nitrogen output after being input to the main condenser evaporimeter, the liquid nitrogen of output partly is input to down top of tower, another part passes through the input that subcooler and choke valve are input to top of tower and liquid nitrogen storage tank respectively again, the dirty nitrogen of last tower top output is output in outside the air separation plant through subcooler and heat exchanger rear section, another part is input to the molecular sieve purification device, exports behind subcooler and heat exchanger respectively after the pure nitrogen gas of last tower top output and the pure nitrogen gas on liquid nitrogen storage tank top converge; The liquid oxygen of last tower bottom outputs to the input of liquid oxygen storage tank, and the gas oxygen at the gas oxygen of last tower bottom and liquid oxygen storage tank top converges and exports through behind the heat exchanger; Described liquid nitrogen storage tank and liquid oxygen storage tank bottom are respectively equipped with liquid nitrogen output and liquid oxygen output.

Described main condenser evaporimeter also is provided with the helium output with the air separation equipment external communications.

Also be provided with before the described air compressor air to be compressed is carried out the filtered air filter, be provided with the precooling unit that the air after the compression is carried out precooling between described air compressor and the molecular sieve purification device.

Described molecular sieve purification device comprises molecular sieve purifier and electric heater, and the output of described some heater links to each other with the regeneration gas input of molecular sieve purifier, and the input of described heater links to each other with the dirty nitrogen output of rectifying column.

The utility model advantage is:

1. the utility model is provided with supercharging aftercooler and low temperature ice maker behind supercharger, makes the air direct liquefaction become liquid air to enter rectifying column.

2. the utility model rectifying column separates and can directly obtain liquid oxygen and liquid nitrogen, adds liquefaction equipment with air separation equipment that routine is separated and compares, and the utility model equipment volume is little, and floor space is little, the automatization level height.

3. the utility model adopts the precooling unit that air is cooled off, isolate the moisture that is condensed by separator, prevent that effectively moisture, carbon dioxide from entering the Cryo Equipment in the ice chest, reduce the load of molecular sieve purifier, make the adsorption effect of molecular sieve purifier better, operating pressure is low, and is safe and reliable.

Description of drawings

Fig. 1 is the structural representation of the utility model specific embodiment.

Wherein: 1 air compressor; 2 molecular sieve purification devices; 21 molecular sieve purifiers; 22 electric heaters; 3 turbine boosting expansion gears; 31 superchargers; 32 decompressors; 4 heat exchangers; 5 rectifying columns; Tower on 51; 52 times towers; 53 main condenser evaporimeters; 6 air cleaners; 7 precooling units; 8 recycle compressors; 9 supercharging aftercoolers; 10 low temperature ice makers; 11 choke valves; 12 subcoolers; 13 liquid nitrogen storage tanks; 14 liquid oxygen storage tanks; 15 raw airs; The outlet of 16 nitrogen products; The outlet of 17 product liquid oxygen; 18 ice chests; A liquid air output; B gas nitrogen output; C gas nitrogen input; D liquid nitrogen output; E helium output; F liquid oxygen output; G gas oxygen output; H liquid air input; The dirty nitrogen output of i; J liquid nitrogen input; The pure gas nitrogen of k output.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment:

A kind of liquia air separation equipment, comprise the air compressor 1 that extraneous air is compressed, the molecular sieve purification device 2 that the air that air compressor 1 is exported purifies, to carry out the turbine boosting expansion gear 3 of swell refrigeration through the air that purifies, will be through the rectifying column 5 of the air separation of turbine boosting expansion gear 3, the heat exchanger 4 that the part gas-liquid that rectifying column 5 is transmitted outside tower carried out cold subcooler 12 and carried out heat exchange for the gas in the air separation equipment, described turbine boosting expansion gear 3 comprises supercharger 31 and the decompressor 32 that coaxial heterodoxy is provided with, described rectifying column 5 comprises tower 51 and following tower 52, described tower 51 bottoms of going up are provided with main condenser evaporimeter 53, be provided with recycle compressor 8 between described turbine boosting expansion gear 3 and the molecular sieve purification device 2, be provided with cooling device between described supercharger 31 and the decompressor 32.

Described cooling device comprises supercharging aftercooler 9 behind the supercharger 31 and the low temperature ice maker 10 between supercharging aftercooler 9 and the decompressor 32.

A branch of the output of described molecular sieve purification device 2 is communicated with the bottom of following tower 52 through heat exchanger 4 backs, and another branch links to each other with the input of recycle compressor 8; The output of described supercharging aftercooler 9 links to each other with the input of low temperature ice maker 10 through heat exchanger 4 backs, the output of described low temperature ice maker 10 links to each other with the input of decompressor 32 through heat exchanger 4 back branches, and another branch is connected to down tower 52 bottoms behind choke valve 11; The output of decompressor 32 links to each other with the input of recycle compressor 8 through heat exchanger 4 backs.

Described air separation equipment also comprises liquid nitrogen storage tank 13 and liquid oxygen storage tank 14; Described tower 52 bottoms down and top are respectively equipped with the gentle nitrogen output of liquid air output a b; Described main condenser evaporimeter 53 is provided with gas nitrogen input c and liquid nitrogen output d; The described tower 51 of going up is respectively equipped with the gentle oxygen output of liquid oxygen Ausgang g in main condenser evaporimeter 53 belows and top, last tower 51 middle parts are provided with liquid air input h, last tower 51 tops are provided with dirty nitrogen output i, and last tower 51 tops are respectively equipped with liquid nitrogen input j and pure gas nitrogen output k; Described liquid air output a passes through subcooler 12 after choke valve 11 links to each other with liquid air input h; Described gas nitrogen output b links to each other with gas nitrogen input c; One of described liquid nitrogen output d links to each other with following tower 52 tops, and another links to each other with the input of liquid nitrogen input j and liquid nitrogen storage tank 13 respectively with choke valve 11 through subcooler 12; Described dirty nitrogen output i and pure gas nitrogen output k export after the re-heat in heat exchanger 4 through subcooler 12 again; Described liquid oxygen Ausgang is communicated with the input of liquid oxygen storage tank 14, exports after 4 re-heats of described gas oxygen output g process heat exchanger.

The described liquid air of tower 52 bottoms down is input to the middle part of tower 51 behind subcooler 12 and choke valve 11, the described pure nitrogen gas at tower 52 tops down is liquefied as liquid nitrogen output after being input to main condenser evaporimeter 53, the liquid nitrogen of output partly is input to down tower 52 tops, another part passes through the input that subcooler 12 and choke valve 11 are input to tower 51 tops and liquid nitrogen storage tank 13 respectively again, the dirty nitrogen of last tower 51 tops output is output in outside the air separation plant through subcooler 12 and heat exchanger 4 rear sections, another part is input to molecular sieve purification device 2, output behind subcooler 12 and heat exchanger 4 respectively after the pure nitrogen gas of last tower 51 tops output and the pure nitrogen gas on liquid nitrogen storage tank 13 tops converge; The liquid oxygen of last tower 51 bottoms outputs to the input of liquid oxygen storage tank 14, the gas oxygen of last tower 51 bottoms and the gas oxygen at liquid oxygen storage tank 14 tops converges and through the output of heat exchanger 4 back; Described liquid nitrogen storage tank 13 and liquid oxygen storage tank 14 bottoms are respectively equipped with liquid nitrogen output and liquid oxygen output.

Described main condenser evaporimeter 53 also is provided with the helium output e with the air separation equipment external communications.

Also be provided with before the described air compressor 1 air to be compressed is carried out filtered air filter 6, be provided with the precooling unit 7 that the air after the compression is carried out precooling between described air compressor 1 and the molecular sieve purification device 2.

Described molecular sieve purification device 2 comprises molecular sieve purifier 21 and electric heater 22, and the output of described some heater 22 links to each other with the regeneration gas input of molecular sieve purifier 21, and the input of described heater 22 links to each other with the dirty nitrogen output of rectifying column 5.

Wherein heat exchanger 4, rectifying column 5, subcooler 12, liquid nitrogen storage tank 13 and liquid oxygen storage tank 14 are located in the ice chest 18; It is outer and decompressor 32 is located in the ice chest 18 that the supercharger 31 of turbine boosting expansion gear 3 is located at ice chest 18; Remaining device is located at ice chest 18 outsides.

During work, raw air 15 removes dust and mechanical admixture through air cleaner 6, is compressed to 0.56MPa in air compressor 1, and compressed air enters the molecular sieve purifier 21 of automatic switchover then through 7 coolings of precooling unit, to remove H 2O, CO 2And C 2H 2And other hydrocarbon, the air themperature that goes out molecular sieve purifier 21 is about 14 ℃, is divided into two the tunnel: the one tunnel and enters ice chest 18, passes through in heat exchanger 4 and the gas converting heat that backflows, and is cooled to condensing temperature, enters down tower 52 and participates in rectifying; Another road enters in the supercharger 31 after recycle compressor 8 is pressurized to 3.0MPa, supercharging is after 9 coolings of supercharging aftercooler, then enter in the heat exchanger 4 and go out heat exchanger 4 after the cooling, enter 10 coolings of low temperature ice maker again, and then enter in the heat exchanger 4 cooling, a part directly comes out to enter down tower 52 through throttling after heat exchanger 4 liquefaction, another part at heat exchanger 4 middle parts or partially bottom is extracted the part air and removes decompressor 32 swell refrigerations, and the air after the expansion removes recycle compressor 8 after entering heat exchanger 4 re-heats; Also have one road little air to go the instrument air system (not shown), as instrument supply gas and blanket gas.

At following tower 52, air is become nitrogen and oxygen-enriched liquid air by initial gross separation.Obtain pure nitrogen gas at following tower 52 tops, pure nitrogen gas is input to and is condensed into liquid nitrogen by liquid oxygen in the main condenser evaporimeter 53, and part liquid nitrogen is returned down the tower 52 conducts phegma of tower 52 down; Another part liquid nitrogen, after subcooler 12 was crossed cold and throttling, great majority entered tower 51 tops, and as the phegma of last tower 51, minority enters liquid nitrogen storage tank 13, exports from nitrogen products outlet 16 as nitrogen products.Liquid air at the bottom of following tower 52 towers is cold excessively through subcooler 12, enters tower 51 middle parts and participate in rectifying after throttling, after last tower 51 separates again, obtains a large amount of pure nitrogen gas at last tower 51 tops, cooling box 18 after subcooler 12, heat exchanger 4 re-heats; Dirty nitrogen is extracted out on last tower 51 tops, and still cooling box 18 after subcooler 12, heat exchanger 4 re-heats partly goes molecular sieve purifier 21 as regeneration gas through electric heater 22, and all the other are discharged in the air; Obtain the liquid oxygen product draws from product liquid oxygen outlet 17 behind liquid oxygen storage tank 14 in last tower 51 bottoms.

The utility model rectifying column separates and can directly obtain liquid oxygen and liquid nitrogen, the air separation of separating with routine Equipment adds liquefaction equipment to be compared, and the utility model equipment volume is little, and floor space is little, the automatization level height.

Claims (7)

1. liquia air separation equipment, comprise the air compressor (1) that extraneous air is compressed, the molecular sieve purification device (2) that the air that air compressor (1) is exported purifies, to carry out the turbine boosting expansion gear (3) of swell refrigeration through the air that purifies, will be through the rectifying column (5) of the air separation of turbine boosting expansion gear (3), the heat exchanger (4) that the part gas-liquid that rectifying column (5) is transmitted outside tower carried out cold subcooler (12) and carried out heat exchange for the gas in the air separation equipment, described turbine boosting expansion gear (3) comprises supercharger (31) and the decompressor (32) that coaxial heterodoxy is provided with, described rectifying column (5) comprises tower (51) He Xiata (52), described tower (51) bottom of going up is provided with main condenser evaporimeter (53), described it is characterized in that: be provided with recycle compressor (8) between described turbine boosting expansion gear (3) and the molecular sieve purification device (2), be provided with cooling device between described supercharger (31) and the decompressor (32).
2. liquia air separation equipment according to claim 1 is characterized in that: described cooling device comprises supercharging aftercooler (9) behind the supercharger (31) and the low temperature ice maker (10) between supercharging aftercooler (9) and the decompressor (32).
3. liquia air separation equipment according to claim 2, it is characterized in that: a branch of the output of described molecular sieve purification device (2) is communicated with the bottom of following tower (52) through heat exchanger (4) back, and another branch links to each other with the input of recycle compressor (8); The output of described supercharging aftercooler (9) links to each other with the input of low temperature ice maker (10) through heat exchanger (4) back, the output of described low temperature ice maker (10) links to each other with the input of decompressor (32) through the back branch of heat exchanger (4), and another branch is connected to down tower (52) bottom behind choke valve (11); The output of decompressor (32) links to each other with the input of recycle compressor (8) through heat exchanger (4) back.
4. liquia air separation equipment according to claim 3 is characterized in that: described air separation equipment also comprises liquid nitrogen storage tank (13) and liquid oxygen storage tank (14); The liquid air of described tower (52) down bottom is input to the middle part of tower (51) behind subcooler (12) and choke valve (11), the described pure nitrogen gas at tower (52) top down is liquefied as liquid nitrogen output after being input to main condenser evaporimeter (53), the liquid nitrogen of output partly is input to down tower (52) top, another part passes through the input that subcooler (12) and choke valve (11) are input to tower (51) top and liquid nitrogen storage tank (13) respectively again, the dirty nitrogen of last tower (51) top output is output in outside the air separation plant through subcooler (12) and heat exchanger (4) rear section, another part is input to molecular sieve purification device (2), output behind subcooler (12) and heat exchanger (4) respectively after the pure nitrogen gas of last tower (51) top output and the pure nitrogen gas on liquid nitrogen storage tank (13) top converge; The liquid oxygen of last tower (51) bottom outputs to the input of liquid oxygen storage tank (14), and the gas oxygen of last tower (51) bottom converges with the gas oxygen at liquid oxygen storage tank (14) top and through exporting behind the heat exchanger (4); Described liquid nitrogen storage tank (13) and liquid oxygen storage tank (14) bottom are respectively equipped with liquid nitrogen output and liquid oxygen output.
5. liquia air separation equipment according to claim 4 is characterized in that: described main condenser evaporimeter (53) also is provided with the helium output (e) with the air separation equipment external communications.
6. liquia air separation equipment according to claim 1, it is characterized in that: preceding also being provided with of described air compressor (1) carried out filtered air filter (6) with air to be compressed, is provided with the precooling unit (7) that the air after the compression is carried out precooling between described air compressor (1) and the molecular sieve purification device (2).
7. liquia air separation equipment according to claim 1, it is characterized in that: described molecular sieve purification device (2) comprises molecular sieve purifier (21) and electric heater (22), the output of described some heater (22) links to each other with the regeneration gas input of molecular sieve purifier (21), and the input of described heater (22) links to each other with the dirty nitrogen output of rectifying column (5).
CNU2008201858236U 2008-09-05 2008-09-05 Liquid air separation plant CN201265997Y (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101929791A (en) * 2010-08-19 2010-12-29 苏州制氧机有限责任公司 Large-tonnage high-purity nitrogen equipment
CN101929790A (en) * 2010-08-19 2010-12-29 苏州制氧机有限责任公司 High-purity nitrogen equipment
CN101943513A (en) * 2010-09-30 2011-01-12 杭州川空通用设备有限公司 Method for lowering liquid space division energy consumption
CN102032755A (en) * 2010-08-03 2011-04-27 苏州制氧机有限责任公司 Air separation device
CN105378411A (en) * 2013-07-11 2016-03-02 林德股份公司 Method for producing at least one air product, air separation system, method and device for producing electrical energy
CN106461323A (en) * 2014-06-26 2017-02-22 乔治洛德方法研究和开发液化空气有限公司 Cryogenic purification with heat uptake
CN109470062A (en) * 2018-11-02 2019-03-15 辽宁新瑞碳材料科技有限公司 A kind of exhaust treatment system containing argon of high temperature furnace dry production graphite for diamond
WO2019104524A1 (en) * 2017-11-29 2019-06-06 乔治洛德方法研究和开发液化空气有限公司 Cryogenic distillation method and apparatus for producing pressurized air by means of expander booster in linkage with nitrogen expander for braking

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102032755A (en) * 2010-08-03 2011-04-27 苏州制氧机有限责任公司 Air separation device
CN101929791A (en) * 2010-08-19 2010-12-29 苏州制氧机有限责任公司 Large-tonnage high-purity nitrogen equipment
CN101929790A (en) * 2010-08-19 2010-12-29 苏州制氧机有限责任公司 High-purity nitrogen equipment
CN101929791B (en) * 2010-08-19 2012-06-13 苏州制氧机有限责任公司 Large-tonnage high-purity nitrogen equipment
CN101943513A (en) * 2010-09-30 2011-01-12 杭州川空通用设备有限公司 Method for lowering liquid space division energy consumption
CN101943513B (en) * 2010-09-30 2013-01-30 杭州川空通用设备有限公司 Method for lowering liquid space division energy consumption
CN105378411A (en) * 2013-07-11 2016-03-02 林德股份公司 Method for producing at least one air product, air separation system, method and device for producing electrical energy
CN105378411B (en) * 2013-07-11 2019-01-22 林德股份公司 Produce method, the air separation plant, the method and apparatus produced electricl energy of at least one air products
CN106461323A (en) * 2014-06-26 2017-02-22 乔治洛德方法研究和开发液化空气有限公司 Cryogenic purification with heat uptake
CN106461323B (en) * 2014-06-26 2019-08-06 乔治洛德方法研究和开发液化空气有限公司 Cryogenic purincation method with heat absorption
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CN109470062A (en) * 2018-11-02 2019-03-15 辽宁新瑞碳材料科技有限公司 A kind of exhaust treatment system containing argon of high temperature furnace dry production graphite for diamond

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