CN204421482U - Argon gas preparation facilities - Google Patents
Argon gas preparation facilities Download PDFInfo
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- CN204421482U CN204421482U CN201420815299.1U CN201420815299U CN204421482U CN 204421482 U CN204421482 U CN 204421482U CN 201420815299 U CN201420815299 U CN 201420815299U CN 204421482 U CN204421482 U CN 204421482U
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Abstract
The utility model relates to a kind of argon gas preparation facilities, and it comprises: pretreatment unit; For receiving the purifier of the air that described pretreatment unit exports; Rectifying column, described rectifying column comprises Xia Ta, Shang Ta; The top of described upper tower also offers the argon gas export for exporting argon gas, the crude argon device that described argon gas export is also sequentially connected with argon gas export respectively and removed the smart argon device of nitrogen by boiling point; The top of described crude argon device is connected with a crude argon device condenser, and described crude argon device condenser is connected by the top of return flow line with described crude argon device, to maintain the rectifying operating mode of crude argon device.
Description
Technical field
The utility model relates to a kind of air-separating plant, particularly relates to a kind of argon gas preparation facilities.
Background technology
Air separation plant take usually air as raw material, air liquefy can be gone out liquid gas through rectifying again by methods such as compression cycle cryogenic refrigerations, can also from liquid air progressively separation of produced go out the inert gases such as oxygen, nitrogen and argon gas.In the prior art, air separation plant makes unremitting effort to improve the purity of gas.Air separation plant generally comprises air compressor machine, purifier and rectifying column.Air compressor machine, also known as air compressor, being generally just to provide source of the gas power, is the main body in the dynamo-electric bleed air source device of nucleus equipment of pneumatic system, it is the device mechanical energy of former dynamic (normally motor) being converted to gas pressure energy, is compressed-air actuated pressure generator.Purifier (purifier) is a visual plant in liquefaction gas processes.Gas is progressively cooled cooling in refrigerative circle system, before reaching condensation temperature, foreign gas in gas will condense into solid and be attached to the place such as pipeline and valve, even enter decompressor, liquefier is finally made to quit work, so install purifier in liquefaction process, take chemical method or freezing method or physical adsorption process to remove impurity by the type of impurity, reach the object of purification for gas.Rectifying column is the tower vapor-liquid contacting apparatus of one carrying out rectifying.There are plate column and packed tower two kinds of main Types.Continuous rectifying tower and batch fractionating tower can be divided into again according to mode of operation.
But the practice be through for many years finds, adopt air separation plant conventional in prior art, still cannot obtain more pure argon gas.
Summary of the invention
In order to overcome the above-mentioned defect of prior art, technical problem to be solved in the utility model is to provide a kind of argon gas preparation facilities, to obtain more pure argon gas.
For achieving the above object, the technical solution of the utility model is:
A kind of argon gas preparation facilities, it is characterized in that, it comprises:
Pretreatment unit;
For receiving the purifier of the air that described pretreatment unit exports;
Rectifying column, described rectifying column comprises Xia Ta, Shang Ta;
The bottom of described lower tower offers the saturated gas for accepting after purifier purifying, the inside of described lower tower is provided with column plate, the top of described lower tower has the heat exchange fluid apertures for inputting heat exchange liquid, the bottom of described lower tower is provided with the oxygen enriched liquid air outlet slit for exporting oxygen enriched liquid air, the top of described lower tower is provided with the pure nitrogen gas outlet for exporting pure nitrogen gas, and described pure nitrogen gas outlet is also connected with a nitrogen condenser to obtain pure liquid nitrogen;
The middle part of described upper tower is also provided with the oxygen enriched liquid air openings be communicated with described oxygen enriched liquid air outlet slit to accept oxygen enriched liquid air, and the bottom of described upper tower offers the liquid oxygen outlet for drawing liquid oxygen;
The top of described upper tower also offers the argon gas export for exporting argon gas, the crude argon device that described argon gas export is also sequentially connected with argon gas export respectively and removed the smart argon device of nitrogen by boiling point;
The top of described crude argon device is connected with a crude argon device condenser, and described crude argon device condenser is connected by the top of return flow line with described crude argon device, to maintain the rectifying operating mode of crude argon device.The utility model adopts said structure, can obtain more pure argon gas.
Accompanying drawing explanation
Accompanying drawing described here only for task of explanation, and is not intended to limit the utility model scope of disclosure by any way.In addition, the shape of each parts in figure and proportional sizes etc. are only schematic, for helping understanding of the present utility model, are not the shape and the proportional sizes that specifically limit each parts of the utility model.Those skilled in the art, under instruction of the present utility model, can select various possible shape and proportional sizes to implement the utility model as the case may be.
Fig. 1 is the structure principle chart of the argon gas preparation facilities in the utility model.
The Reference numeral of above accompanying drawing: 10, pretreatment unit; 11, air cleaner; 12, air compressor machine; 13, regenerator; 14, cooler; 15, forecooler; 16, air cooling tower; 17, water-cooling tower; 20, purifier; 21, absorbing cylinder; 22, heater; 23, controller; 30, rectifying column; 31, Xia Ta; 310, column plate; 311, pure nitrogen gas outlet; 312, heat exchange fluid apertures; 313, oxygen enriched liquid air outlet slit; 314, dirty nitrogen outlet; 32, Shang Ta; 321, oxygen enriched liquid air openings; 322, liquid oxygen outlet; 323, argon gas export; 4, crude argon device; 41, crude argon device condenser; 5, smart argon device.
Detailed description of the invention
By reference to the accompanying drawings with the description of the utility model detailed description of the invention, can clearly understand details of the present utility model.But detailed description of the invention of the present utility model described here, only for explaining the purpose of this utility model, and can not to be understood as by any way be to restriction of the present utility model.Under instruction of the present utility model, technical staff can conceive based on distortion possible arbitrarily of the present utility model, and these all should be regarded as belonging to scope of the present utility model.
The utility model discloses a kind of argon gas preparation facilities, it comprises pretreatment unit 10, purifier 20 and rectifying column 30.
Pretreatment unit 10 flow direction comprised along air is sequentially arranged the air cleaner 11, air compressor machine 12, regenerator 13, cooler 14, the forecooler 15 that arrange, described air compressor machine 12 flow direction comprised along air is sequentially arranged the first order compressor, first order cooling device, high stage compressor, second level cooling device and the third level compressor that arrange, described forecooler 15 comprise air cooling tower for accepting air and for described air cooling tower input cold water to carry out the water-cooling tower of heat exchange.Air, through self-cleaning air filter 11, is sucked by air compressor machine 12, through three stage compression after the mechanical admixture such as most dusts in removing air, secondary cooling during rolling, air pressure brings up to 1.0MPa, and compressed air enters regenerator 13, aftercooler 14, is cooled to about 40 DEG C.Subsequently, compressed air enters forecooler 15.Air carries out caloic exchange with the water at low temperature come from water-cooling tower in air cooling tower, is cooled to 10 DEG C from 40 DEG C.Saturation moisture content when water content in air is also reduced to 10 DEG C from saturation moisture content when 40 DEG C.That is, the most water vapours in air are condensed precipitation, and remove in air cooling tower, and this will greatly improve the condition of work of downstream purification device 20.The waste gas (drying) that forecooler 15 adopts fractionating column to discharge is sent into water-cooling tower and is carried out caloic exchange, waste gas enters cooling water heat and mass dirty with tower top bottom water-cooling tower, waste gas enters air from water-cooling tower top, and the temperature of cooling water at the bottom of tower can reach about 20 DEG C.This cooling water is further cooled after pump boosting in handpiece Water Chilling Units, is then divided into two strands, and one is sent into air cooling tower top and goes cooled compressed air, uses air cooling tower air themperature and is about 10 DEG C.One removes the air after decompressor A aftercooler 14 cooling of charge.Air cleaner 11 is ZKG-500 self-cleaning air filter 11.
The air that purifier 20 exports for receiving described pretreatment unit 10.Described purifier 20 comprises two absorbing cylinders 21 being built-in with filter core be arranged in parallel, and is arranged on the heater 22 outside each absorbing cylinder 21, for controlling purifier 20 controller 23 of described absorbing cylinder 21 break-make and described heater 22.Compressed air after precooling dewaters enters the water removing will dissociated in air in the water segregator of purifier 20.Afterwards when purifier 20 absorbing cylinder 21, the residue water vapour in air and carbon dioxide are attracted in adsorbent activity aluminium oxide and 13X molecular sieve.Purifier 20 by absorbing cylinder 21, electric heater 22 of two in-built activated aluminas and 13X molecular sieve, a set of by-pass valve control and a switch board composition.Air passes through a wherein absorbing cylinder 21, and the carbon dioxide in air and residue water vapour are attracted in molecular sieve and activated alumina, and air is purified.Adsorbent in an absorbing cylinder 21 after work in four hours, by by the water vapour in air and carbon dioxide saturated and lose adsorption capacity.At this moment, the adsorbent in this absorbing cylinder 21 will regenerate, to recover its ability to work.For this reason, air is passed into another and regenerated complete absorbing cylinder 21, the absorbing cylinder 21 losing adsorption capacity then proceeds to regeneration regime.Send into absorbing cylinder 21 through regenerator 13, electric heater 22 after being heated to 150 ~ 180 DEG C with the dirty nitrogen that decompressor B supercharger is discharged, the water vapour adsorbed and carbon dioxide are parsed, enter air in activated alumina and molecular sieve.When absorbing cylinder 21 outlet temperature reaches 60 DEG C, electric heater 22 turned off automatically by electric control gear, and triple valve is switched to without regenerator 13, electric heater 22 stream, and dirty nitrogen directly enters absorbing cylinder 21 blast-cold after the cooling of supercharging gas heat exchanger.Operating temperature during to make absorbing cylinder 21 temperature is adsorbed close to it after blast-cold terminates.By such switching and regeneration, the air going out purifier 20 just constantly reaches purification.The work of regenerator 13 is interrupted.When absorbing cylinder 21 thermal regeneration, regenerator 13 works, and namely triple valve is connected and removed regenerator 13, electric heater 22 heats, and when absorbing cylinder 21 proceeds to the blast-cold stage, regeneration gas is directly sent into absorbing cylinder 21 blast-cold by purifier 20 electrical control cubicles interlocked control triple valve.This is done in the heating period, the regeneration gas entering electric heater 22 has higher temperature, to reduce the power of electric heater 22, saves energy.Cool through dirty nitrogen cooler 14 during blast-cold and reduce regeneration gas temperature, accelerate the speed of cold blowing.
Rectifying column 30, described rectifying column 30 comprises lower tower 31, upper tower 32.
The bottom of described lower tower 31 offers the saturated gas for accepting after purifier 20 purifying, the inside of described lower tower 31 is provided with column plate 310, the top of described lower tower 31 has the heat exchange fluid apertures 312 for inputting heat exchange liquid, the bottom of described lower tower 31 is provided with the oxygen enriched liquid air outlet slit 313 for exporting oxygen enriched liquid air, the top of described lower tower 31 is provided with the pure nitrogen gas outlet 311 for exporting pure nitrogen gas, and described pure nitrogen gas outlet 311 is also connected with a nitrogen condenser to obtain pure liquid nitrogen.
The middle part of described upper tower 32 is also provided with the oxygen enriched liquid air openings 321 being communicated with to accept oxygen enriched liquid air with described oxygen enriched liquid air outlet slit 313, and the bottom of described upper tower 32 offers the liquid oxygen outlet 322 for drawing liquid oxygen.
The top of described upper tower 32 also offers the argon gas export 323 for exporting argon gas, what described argon gas export 323 was also sequentially connected with argon gas export 323 respectively be connected crude argon device 324 and smart argon device 325.
The saturated air entered bottom lower tower 31 rises along column plate 310 aperture, exchange heat and mass exchange is carried out repeatedly at each block column plate 310 with the liquid flowed down from lower tower 31 top block-by-block column plate 310, finally obtain pure nitrogen gas at lower tower 31 top, at the bottom of tower, obtain oxygen enriched liquid air.
The middle part of described lower tower 31 is provided with dirty nitrogen outlet 314, and described dirty nitrogen outlet 314 is connected with a dirty nitrogen filter (not shown), and the outlet of described dirty nitrogen filter 314 is connected with the heat exchange fluid apertures 312 at described lower tower 31 top.
The pure nitrogen gas at lower tower 31 top is divided into two strands, enters smart argon condenser after a stock-traders' know-how essence argon evaporator condensation by valve V710, in smart argon condenser with argon gas heat exchange laggard enter main heat exchanger after re-heat, supply user as product nitrogen gas.Another stock enters condenser/evaporator and is condensed into pure liquid nitrogen, and a part of pure liquid nitrogen is led back lower tower 31 top as lower tower 31 phegma, to maintain the rectifying operating mode of lower tower 31; The pure liquid nitrogen of another part through liquid nitrogen liquid dirty nitrogen subcooler cross cold after be divided into again two strands, one crosses cold rear portion as nitrogen products through liquid nitrogen subcooler is that nitrogen products is sent, another part is got back to liquid nitrogen subcooler through throttling and is removed overfreezing liquid nitrogen, converge with smart argon condenser nitrogen out afterwards laggard enter main heat exchanger re-heat send ice chest to normal temperature as product nitrogen gas.Another strand of liquid nitrogen is sent to smart argon device 325 condenser and makes low-temperature receiver after V711 valve and the liquid nitrogen going out V710 valve converge.
Liquid nitrogen fraction is extracted out in the middle part of lower tower 31.Liquid nitrogen fraction sends into tower 32 top after converging with liquefaction heat exchanger liquid nitrogen fraction out after cold throttling crossed by liquid nitrogen liquid nitrogen fraction subcooler, as the phegma of upper tower 32.
At the bottom of lower tower 31 tower, extract oxygen-enriched liquid air out, through liquid air liquid oxygen supercooler cross cold after be divided into two strands, a part is sent into as phegma in the middle part of upper tower 32, and another part oxygen-enriched liquid air is sent to crude argon device condenser 41 and makes low-temperature receiver.Bottom upper tower 32, become liquid oxygen after two bursts of phegmas participation rectifying of upper tower 32, flow into condenser/evaporator heat vaporized rear as rising gas by the nitrogen of lower tower 31, the rectifying of tower 32 in maintenance.Take out a part of rising gas, through main heat exchanger re-heat cooling box as product oxygen.Liquid oxygen is drawn bottom condenser/evaporator, through liquid air liquid oxygen supercooler cross cold after cooling box as product liquid oxygen.
The dirty nitrogen extracted out at upper tower 32 top send turbo-expander B swell refrigeration after the re-heat of liquid air liquid oxygen supercooler.Dirty nitrogen after expansion is sent ice chest through main heat exchanger re-heat to normal temperature again and is divided into two strands after the re-heat of liquid air liquid oxygen supercooler, and one directly goes water-cooling tower to freeze, and another stock goes the supercharging of decompressor B pressurized end as purifier 20 regeneration gas.
In upper tower 32 gas phase, argon has two concentrated points, one at stripping section, one at rectifying section.But in the stripping section argon place of concentrating gas phase, the maximum level of argon concentrates the argon content in place's gas phase far above smart gold-plating section argon, therefore, extracts Argon fraction processed in the scope that always argon concentration is maximum in upper tower 32 stripping section gas phase.
Be more than first condition of Argon fraction demand fulfillment, the argon concentration namely in cut is high as far as possible.Argon fraction also will meet second condition simultaneously, is exactly that nitrogen content in cut is the least possible.In general, nitrogen allow nitrogen content can not more than 300PPm in cut, because can not be removed at crude argon device 324.At crude argon device 324 in order to obtain the crude argon being less than 2PPm containing oxygen, the nitrogen in crude argon device 324 uprising gas can concentrate 30 ~ 40 times, and that is, the nitrogen content in crude argon device 324 top gas phase can raise 30 ~ 40 times than the nitrogen content in cut.When the nitrogen content in the crude argon going crude argon device condenser 41 to be condensed raises, the heat transfer temperature difference of condenser/evaporator will reduce.When going the nitrogen content in condenser crude argon to be elevated to certain value, crude argon device condenser 41 will quit work, cut gas can not be extracted out from upper tower 32 again and enter crude argon device 324, " nitrogen plug " phenomenon may encountered in argon operation processed that Here it is, when there is nitrogen plug in crude argon device 324, incoagulable gas (nitrogen+argon) can only be discharged in a large number from crude argon device condenser 41, adjust king-tower operating mode simultaneously, reduce the nitrogen content in Argon fraction.
Clearly, second condition is more important than first condition, namely first meets second condition, considers As soon as possible Promising Policy first condition on this basis again.Therefore, Argon fraction generally not from upper tower 32 stripping section gas phase the extreme higher position of argon concentration extract out, but to extract out in the lower position of more down some argon concentration, because the nitrogen content here in cut can be lower.
It is noted that therefore, design calculated value and actual measured value have error because operating data can not be identical with design data.We wish that the argon content in cut can reach about 10 ﹪, but may usually can not reach in practical operation, but this also it doesn't matter, suitably can take out some cut amounts and made up.
From upper tower 32 extract component rationally, the Argon fraction of reasonable quantity sends into crude argon device 324, this is the first step carried in argon process is also a most important step.The expanded air amount of tower 32 in feeding, oxygen withdrawal amount, oxygen purity, nitrogen withdrawal amount etc. are to extracting how many Argon fraction out, in Argon fraction, the content of argon, nitrogen, oxygen all can have important impact, operator by groping to sum up and accumulate experience, reasonably should be controlled above each parameter and being regulated.
It should be noted that: air separation unit, after producing argon gas, can improve the recovery rate being separated oxygen in air.Be obtain higher Argon recovery rate with argon air separation unit, have strict restriction to the expanded air amount (La Heman tolerance) sending into upper tower 32, once exceed this restriction, not only argon output reduces, and oxygen yield also improves seldom, is lose more than gain.Therefore, this device is not when being with argon column, and swell increment can all send into tower 32, but be with argon column time, must some expand after air send into dirty nitrogen pipe recovery cold after emptying.Although TAV is than few when not being with argon column during band argon column, oxygen yield during band argon column is not than high with oxygen yield during argon column, and the recovery rate raising being separated oxygen in air during Here it is band argon column causes.
Crude argon is produced at crude argon device 324, after cut enters crude argon device 324, through the distillation process of the nearly 300 pieces of actual plate 310 argon oxygen separating of crude argon device 324, in the uprising gas at crude argon top, oxygen content has been reduced to designing requirement 2PPm, and the nitrogen in cut is then all concentrated to be drawn out of to draw and goes to do in the crude argon of further rectifying toward smart argon device 325.The uprising gas at crude argon device 324 top is except extraction sub-fraction is as except intermediate products crude argon, all the other all in crude argon device condenser 41 by liquid air condensation, then crude argon device 324 tower top is all back to, as the phegma of crude argon device 324, to maintain the rectifying operating mode of crude argon device 324.Phegma bottom crude argon device 324 sends back to upper tower 32 by liquid oxygen pump pressurization, continues the distillation process participating in upper tower 32, realizes the balance of whole rectifying column 30 tolerance and component.
Obtaining oxygen content crude argon up to standard at crude argon device 324 top, is the second target in argon process processed.Oxygen content in crude argon is exactly the oxygen content in product argon, because can only to denitrogenate at smart argon device 325 and can not deoxygenation again.Oxygen content in crude argon has slight rising after the further smart gold-plating of smart argon device 325, but substantially constant.
Final product liquid argon is obtained, smart argon device 325 at smart argon device 325, as the term suggests, be the rectifying column 30 quality of argon product being played to the effect of making a final check.
In fact, working to the oxygen content in argon product the effect of checking on is crude argon device 324, and smart argon device 325 just removes the nitrogen in crude argon, makes the nitrogen content in product argon reach regulation requirement.
Because the boiling-point difference of nitrogen argon is comparatively large, except denitrification is not difficult in smart argon device 325.
But because the quantity of each logistics in smart argon device 325 is little, actual volumetric flow is at low temperatures pitiably little especially, as long as several control valves of essence argon device 325 make a motion a little, just may be excessive, therefore, smart argon device 325 be operated and still can meet some difficulties.So the operation of smart argon device 325 must be very careful and patient, worry, lack the major reason of patient smart argon device 325 fluctuation of service often.
Thick gas argon is introduced in the middle part of smart argon device 325.Be connected with evaporimeter bottom essence argon device 325, top connects with condenser.In evaporimeter, with attract from lower tower 31 top a small gangs of in calm the anger nitrogen as thermal source, make the liquid argon vaporization at the bottom of tower provide the uprising gas of smart argon device 325.Gas nitrogen condensation deutomerite flows to into smart argon device 325 condenser as low-temperature receiver, but only leans on these liquid nitrogen to be also not enough to the whole condensation of gas argon that smart argon device 325 is pushed up, so also will attract a small gangs of liquid nitrogen as a supplement again from the liquid nitrogen pipe going out liquid nitrogen subcooler.
Because the boiling point of nitrogen is lower than argon, the nitrogen in crude argon will all be concentrated in tower top and enter condenser.
Within the condenser can only can not by nitrogen condensation by argon condensation, nitrogen will draw tower body as incoagulable gas.The liquid obtaining condensation at condenser then all flows back to smart argon device 325 and pushes up phegma as smart argon device 325.
The operation of essence argon device 325 will note three links:
The first, the nitrogen amount of evaporimeter is entered.This strand of nitrogen is many, be beneficial to, but this strand of nitrogen is many to the rectifying of smart argon device 325, and the liquid nitrogen pushed up to upper tower 32 is just few, unfavorable to the operating mode of upper tower 32.Upper tower 32 stable is the basis of argon processed, so the Controlling principle of this strand of nitrogen amount is: as long as meet the operation working condition requirement of smart argon device 325, and should be more few better.This strand of nitrogen amount is by the throttle valve control of its post liquefaction.
The second, by another liquid nitrogen throttle valve control, the replenisher nitrogen quantity that enters condenser, to operate according to the liquid level of condenser, as long as maintain the stable of condenser liquid nitrogen liquid level.
Three, the control of fixed gas emptying amount.In the fixed gas of releasing except nitrogen, it is more argon gas.The value of argon gas is higher, has been last procedure that purification of argon is produced, so will strictly control emptying amount to smart argon device 325.The number of emptying amount, as long as can make nitrogen content in argon reach designing requirement.
Each embodiment in this description all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (1)
1. an argon gas preparation facilities, is characterized in that, it comprises:
Pretreatment unit;
For receiving the purifier of the air that described pretreatment unit exports;
Rectifying column, described rectifying column comprises Xia Ta, Shang Ta;
The bottom of described lower tower offers the saturated gas for accepting after purifier purifying, the inside of described lower tower is provided with column plate, the top of described lower tower has the heat exchange fluid apertures for inputting heat exchange liquid, the bottom of described lower tower is provided with the oxygen enriched liquid air outlet slit for exporting oxygen enriched liquid air, the top of described lower tower is provided with the pure nitrogen gas outlet for exporting pure nitrogen gas, and described pure nitrogen gas outlet is also connected with a nitrogen condenser to obtain pure liquid nitrogen;
The middle part of described upper tower is also provided with the oxygen enriched liquid air openings be communicated with described oxygen enriched liquid air outlet slit to accept oxygen enriched liquid air, and the bottom of described upper tower offers the liquid oxygen outlet for drawing liquid oxygen;
The top of described upper tower also offers the argon gas export for exporting argon gas, the crude argon device that described argon gas export is also sequentially connected with argon gas export respectively and removed the smart argon device of nitrogen by boiling point;
The top of described crude argon device is connected with a crude argon device condenser, and described crude argon device condenser is connected by the top of return flow line with described crude argon device, to maintain the rectifying operating mode of crude argon device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420815299.1U CN204421482U (en) | 2014-12-19 | 2014-12-19 | Argon gas preparation facilities |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420815299.1U CN204421482U (en) | 2014-12-19 | 2014-12-19 | Argon gas preparation facilities |
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| CN204421482U true CN204421482U (en) | 2015-06-24 |
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| CN201420815299.1U Expired - Fee Related CN204421482U (en) | 2014-12-19 | 2014-12-19 | Argon gas preparation facilities |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758114A (en) * | 2014-12-19 | 2016-07-13 | 常熟市永安工业气体制造有限公司 | Argon preparation device |
| CN108224900A (en) * | 2018-01-24 | 2018-06-29 | 北京拓首能源科技股份有限公司 | A kind of oxygen nitrogen and argon piece-rate system using cold energy of liquefied natural gas |
-
2014
- 2014-12-19 CN CN201420815299.1U patent/CN204421482U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758114A (en) * | 2014-12-19 | 2016-07-13 | 常熟市永安工业气体制造有限公司 | Argon preparation device |
| CN108224900A (en) * | 2018-01-24 | 2018-06-29 | 北京拓首能源科技股份有限公司 | A kind of oxygen nitrogen and argon piece-rate system using cold energy of liquefied natural gas |
| CN108224900B (en) * | 2018-01-24 | 2024-01-09 | 北京拓首能源科技股份有限公司 | Oxygen-nitrogen-argon separation system utilizing liquefied natural gas cold energy |
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