CN1195572A - Pressure swing adsorption gas separation method capable of simultaneously purifying adsorbable phase and non-adsorbable phase from mixed gas - Google Patents

Pressure swing adsorption gas separation method capable of simultaneously purifying adsorbable phase and non-adsorbable phase from mixed gas Download PDF

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Publication number
CN1195572A
CN1195572A CN98111832A CN98111832A CN1195572A CN 1195572 A CN1195572 A CN 1195572A CN 98111832 A CN98111832 A CN 98111832A CN 98111832 A CN98111832 A CN 98111832A CN 1195572 A CN1195572 A CN 1195572A
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tower
gas
absorption
pressure
difficult
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伍仁兴
宋宇文
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Chengdu Research Institute Of New Chemical Industry
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Chengdu Research Institute Of New Chemical Industry
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Abstract

The pressure swing adsorption gas separation method capable of purifying adsorbable phase and non-adsorbable phase from mixed gas simultaneously is characterized by that it only uses a PSA equipment, in which each adsorption tower includes preadsorption step and readsorption step, and these two steps feature that when the impurity content in adsorbable component at the outlet of the adsorption tower will exceed the requirements, raw material gas can be continuously fed into said tower, and the adsorption leading edge of the adsorbable component is continuously moved forwards, and the non-adsorbable component gas whose impurity content exceeds the standard does not pass through outlet valve of product gas, and is fed into another adsorption tower from another valve to make preadsorption. Said invention can raise purity of both phases and product and yield, and can reduce the equipment investment and energy consumption.

Description

Phase of purify easy absorption simultaneously and difficult absorption pressure-changeable gas-adsorption separation method mutually from gaseous mixture
The present invention relates to utilize transformation absorption with the method that admixture of gas separates, relate in particular to the difficult absorption phase of acquisition simultaneously and easily adsorb the method for product gas mutually.
The phase of purify easy absorption is simultaneously adsorbed mutually with difficult from gaseous mixture, and in these two kinds of products, easily absorption is adsorbed mutually impurity each other with difficulty.Easily absorption is relative with difficult absorption mutually.In produce CO2 and nitrogen hydrogen technology simultaneously from conversion gas, CO2 easily adsorbs phase, and N2, H2 gas are difficult absorption phases, measures few CO, the CH4 adsorption capacity is placed in the middle, and they will partly be removed with displacement gas; Producing simultaneously from air in the technology of N2 and O2, N2 is the kiss absorbed component, and O2 is difficult absorbed component, or the like.
In the absorption of common transformation, low in order to make in the difficult absorption phase product impurity content, in adsorption step, when impurity content reaches certain limit in the difficult absorbed component product gas of outlet, just stop absorption.At this moment, also have one section easily absorption phase not reach the saturated bed of absorption near the adsorption tower port of export.In the gas phase of this section bed, difficult absorption phase concentration is very high, is higher than the concentration of unstripped gas, and it is low easily to adsorb phase concentration, is lower than the concentration of unstripped gas, but is higher than the desired concentration of difficult absorption phase product commute absorption phase component impurity; In the adsorbent of this section bed, also be adsorbed with the difficult absorbed component of part.After absorption finished, this part gas of dead space adopted and all presses step to reclaim a part in the tower, but because easily absorbed component absorption forward position is far away from outlet, all press number of times can not be too many etc. factor, the difficult absorbed component gas flow that all pushes back receipts is restricted.
Transformation adsorption seperation of gas, more common method be with one section adsorption tower device with in the gaseous mixture easily absorption remove as impurity, difficult absorption phase product, perhaps will easily adsorb purify mutually product, difficult absorption removes as impurity.Phase of purify easy absorption simultaneously and difficulty were adsorbed pressure swing absorption process mutually in the past, one section or two sections adsorption tower devices often need to connect, further purify impurity (USP4790858) in the difficult absorbed component product gas, therefore difficult absorption phase component product yield is low, investment, energy consumption are higher.
The purpose of this invention is to provide a kind of purity and yield that can improve easy absorbed component product and difficult absorbed component product simultaneously, the phase of purify easy absorption simultaneously from gaseous mixture and the difficult absorption pressure-changeable gas-adsorption separation method mutually of small investment, less energy consumption.
The present invention is achieved in that
Phase of purify easy absorption simultaneously and difficult absorption pressure-changeable gas-adsorption separation method mutually from gaseous mixture, with one section PSA device, each adsorption tower in the device comprises the steps:
(1) under adsorptive pressure, unstripped gas is fed adsorption tower, from unstripped gas, selects the easy absorbed component of absorption,
(2) adsorb LA again:
When in the difficult absorbed component product gas of the exit of adsorption tower easily the absorbed component impurity content soon surpass when requiring, unstripped gas continues to feed this tower and adsorbs, easily the absorption forward position of absorbed component continues to push ahead, easily the absorbed component impurity content flows out without this tower product gas outlet valve above the difficult absorbed component gas that requires, but from flowing out with another valve of end
(3) go out the interior difficult absorbed component gas of tower with easy absorbed component gas displacement,
(4) vacuumize easy adsorption production,
(5) adsorb FA in advance:
Another valve of LA step flows out impurity content and surpasses the difficult absorbed component gas that requires and enter another and just finished the adsorption tower that difficult absorbed component product boosts and adsorb in advance.
Each tower comprises pre-absorption FA successively, adsorbs A, adsorbs LA, drop pressure D again, easily adsorbs phase product gas displacement P, vacuumizes VC, and boost pressure R, difficult absorption phase product gas lift are pressed the FR step.
After drop pressure D step, easily adsorb before the phase product gas displacement P, have forward to put and press step PP.
After easily absorption phase product gas is replaced the P step, vacuumize before the VC step, there be reverse putting to press step D.
Between drop pressure D and boost pressure R step, isolation step I is arranged.
Between drop pressure D or boost pressure R step, isolation step I is arranged.
All pressing number of times is 1-7 time.
The number of adsorption tower is the 3-24 platform.
Every tower carries out following steps successively: (is example with the A tower).
(1) adsorb FA in advance:
Difficult adsorption production gas lift is pressed in the A tower, and the adsorbed gas again of F tower enters pre-absorption from A tower lower end, and difficult adsorption production gas flows out from A tower upper end to be collected, close during end with the F tower to be connected control valve,
(2) absorption A:
Unstripped gas enters from A tower lower end, easily absorption absorption mutually, and qualified difficulty absorption phase product gas continuation is flowed out from A tower upper end and is collected.Adsorb the forward position mutually to certain position when easy absorption, close difficult absorption phase outflow pathway,
(3) adsorb LA again:
Unstripped gas continues to enter the A tower from the lower end, and working off one's feeling vent one's spleen on the A tower enters the B tower adsorbs in advance,
(4) one equal step-down D1:
Gas enters the C tower on entering and finishing the two C towers that all boost in the A tower, closes path after A, the equilibrium of C pressure tower,
(5) equal step-down D2:
Gas enters the D tower in the A tower, closes path after the isostasy,
(6) three equal step-down D3:
Gas enters the E tower of finishing evacuation step in the A tower, closes path after the two pressure tower equilibriums,
(7) along putting PP:
A tower gas is emitted along the absorption direction, closes path after near normal pressure.Return the unstripped gas system after the suitable venting pressurization,
(8) displacement P:
Pure easy absorption phase product gas is through being pressurized to a little more than normal pressure, enter the A tower from the lower end, along the absorption direction the difficult absorbed component in the A tower is cemented out, the difficult absorbed component product gas that displaces flows out through KV3 to be collected, replacement completion is closed the collection path, and displacement effluent gases emptying or it are used, close and emit vein relaxing
(9) VC that finds time:
Open vavuum pump, the easy absorption phase product gas in the tower A extracted out from the lower end, find time to finish, close path,
(10) three R3 that all boost:
The three equal step-down gases that the C tower is accepted in A tower lower end boost, and after the two pressure tower equilibriums, close path,
(11) isolate I1 for the first time:
All sequencing valves of A tower are in closes,
(12) two R2 that all boost:
The A tower is accepted to boost from the two equal step-down gases that the D tower comes, and closes vein relaxing after the two pressure tower equilibriums,
(13) isolate I2 for the second time:
All sequencing valves of A tower are in closed condition,
(14) one R1 that all boost:
The A tower is accepted the equal step-down gas lift pressure that the E tower comes, and closes path after the two pressure tower equilibriums,
(15) FR that finally boosts:
The A tower charges into difficult absorbed component product gas from the upper end against the absorption direction, after pressure is charged to adsorptive pressure, closes path.
As previously mentioned, obtain the pressure-swing absorption apparatus of easy absorbed component and difficult absorbed component product previously simultaneously, need two sections PSA devices usually.The displacement of phase product gas is easily adsorbed in first section absorption that is used for easily adsorbing phase, and step-down (vacuumizing) is regenerated to such an extent that easily adsorb the phase product, and second section is used for removing the easy absorbed component that first section PSA device worked off one's feeling vent one's spleen, and makes difficult absorbed component product purity reach purity requirement.Improvement of the present invention is: at adsorption step, when in the difficult absorbed component product gas in exit easily the absorbed component impurity content soon surpass when requiring, unstripped gas continues to feed this tower and carries out adsorption step again, easily the absorption forward position of absorbed component continues to push ahead, easily the absorbed component impurity content flows out without this tower product gas outlet valve above the difficult absorbed component gas that requires, but another valve flows out from the upper end, enter another after the outflow has again just finished the adsorption tower that difficult absorbed component product boosts and has adsorbed in advance from the bottom, easy absorbed component impurity is removed, and qualified difficult absorbed component product flows out from this difficult absorbed component products export valve in adsorption tower upper end.
After adsorption step finished again, adsorption tower enters all pressed step, further dead space gas in the recovery tower.Drop pressure gas forward flows out from the tower outlet, enters the adsorption tower that another is in equal voltage rise step.All press the number that how much depends on adsorption tower and the adsorptive pressure of number of times, between common 1~7 time, the platform number of adsorption tower changes between 3~24 usually.
After all pressing end, by method of the present invention, adsorption tower can directly enter displacement step, also can enter displacement step again after forward putting the pressure step.Displacement pressure is higher than normal pressure when directly entering displacement step, after the replacement completion, usually adsorption tower is reduced to normal pressure, vacuumizes then; Forward put the pressure step, along the absorption direction tower internal pressure is reduced to normal pressure, forward outlet is further pushed easy absorbed component forward position in step-down, the consumption that is used in the easy absorbed component product gas of displacement will further reduce, but forward return the unstripped gas system after the supercharging of working off one's feeling vent one's spleen of step-down, increase product gas yield.
After forward step-down finished, a little more than forward replacing under the normal pressure, the gas that cements out can be used as waste gas emptying, but also returns the unstripped gas system after the supercharging, further increases the yield of two kinds of products with easy absorbed component product gas.When easily absorbed component concentration reaches its product requirement in the displacement gas outlet, stop displacement.
Replacement completion is extracted easy absorbed component product gas out from the adsorption tower bottom.
Find time to finish, adsorption tower is accepted other tower drop pressure gas lift and is pressed, and all calms the anger to enter from the adsorption tower outlet, also can enter from adsorption tower unstripped gas inlet.
Usually isolation step is set all pressing between step, promptly, waits pending next step adsorption tower sequencing valve complete shut-down.
Boost pressure finishes, and the difficult adsorption production gas lift of the reverse acceptance of adsorption tower is depressed into adsorptive pressure.
The end of boosting, adsorption tower is accepted to carry out pre-adsorption step from another adsorption tower working off one's feeling vent one's spleen of adsorption step again from the unstripped gas inlet.
After pre-adsorption step finished, adsorption tower can enter adsorption step again.
The step of other tower also is by this sequence of steps operation, just staggers mutually on the time.The professional and technical personnel knows, the method according to this invention can be formed a covering device by several towers, and the tower number that is in adsorbed state simultaneously can be two or more.The variation of number of times is all pressed in the increase and decrease of tower number, and what of isolation step all do not exceed scope of the present invention.Those skilled in the art is formed conditions such as concentration as can be known according to different unstripped gas, can select one or more adsorbents in the adsorbents such as activated alumina, active carbon, silica gel, zeolite molecular sieve for use.The variation of adsorbent combination does not exceed scope of the present invention yet.
Pressure swing absorption process provided by the invention has fundamentally improved the purity and the yield of easy absorbed component product and difficult adsorption production, has reduced the investment and the energy consumption of device simultaneously.
Following is accompanying drawing of the present invention:
Fig. 1 is a process chart of the present invention.
Fig. 2 is the working procedure table of embodiments of the invention 1.
Fig. 3 is the working procedure table of embodiments of the invention 2.
Following is the embodiment of the invention:
Embodiment 1:
With conversion gas is raw material, produces pure CO2 and hydrogen, nitrogen mixed gas.
Fig. 2 is a present embodiment working procedure table, and Fig. 1 is a process chart.
Conversion gas is formed:
H2 48~51%(V)
N2 18~20%(V)
CO 1~2%(V)
CH4 1~2%(V)
CO2 25~28%(V)
Temperature: 35 °~40 ℃
Pressure: 0.6~0.8MPa
Adsorption tower has six of A~F in Fig. 1, and P1 is a vavuum pump, and P2 is a supercharger, and V1 is a CO2 product surge tank.Load activated alumina, active carbon, three kinds of adsorbents of silica gel in the adsorption tower, form combination cot successively from bottom to up.
Be example now, method of the present invention is described with the A tower.
1. pre-adsorption step FA
At this moment, the A tower has been finished difficult adsorption production gas N2, the H2 gas lift is pressed step F R, opens sequencing valve 3F, 7A, 2A.The adsorbed gas again of F tower enters the A tower through valve 3F, pipeline G3, G9, G7, valve 7A and adsorbs in advance.N2, H2 purified gas product flow out from 2A.Close sequencing valve 3F, 7A during end.
2. adsorption step A
Open sequencing valve 1A, conversion gas is through pipeline G1, and valve 1A directly enters the A tower, and CO2 is adsorbed in the A tower, and qualified N2, H2 purified gas continue to flow out from sequencing valve 2A, pipeline G2.When CO2 absorption forward position arrives certain position, stop absorption, shut off valve 2A.
3. adsorption step LA again
Conversion gas continues to enter the A tower from 1A, opens sequencing valve 3A, 7B, 2B, and the exit gas of adsorption step enters the B tower through valve 3A, pipeline G3, G9, G7, valve 7B and adsorbs in advance again, when absorption finishes again, and shut off valve 1A, 7B.
4. an equal step-down D1
Open sequencing valve 3C, allow the interior gas of A tower all go into the C tower from finishing the two C towers outlets of all boosting, make its two pressure tower reach balanced through valve 3A, pipeline G3, valve 3C.Close 3A, 3C.
5. two equal step-down D2
Open sequencing valve 4A, 7D, A tower gas enters the D tower through valve 4A, pipeline G4, G9, G7, valve 7D from D tower inlet, makes two pressure towers reach balanced.Close 7D.
6. three equal step-down D3
Open sequencing valve 7E, (G4, G9, G, valve 7E enter the E tower of finishing evacuation step from E tower inlet to A tower gas, make two pressure towers reach balanced through valve 4A, pipeline.Close 7D.
7. along putting PP
Open sequencing valve KV2, A tower gas is depressurized near normal pressure through valve 4A, pipeline G4, valve KV2, G12 along the absorption direction.Close 4A, KV2.Suitable venting body can return the unstripped gas system or use it for anything else after pressurization.This portion gas of present embodiment returns the unstripped gas system.
8. displacement step P
Open sequencing valve 6A, 5A, pure CO2 product gas is pressurized to a little more than normal pressure through supercharger P2, and through valve 6A, pipeline G6 enters the A tower, along pipeline absorption direction with the A tower in difficult absorbed component cement out.The gas that cements out is through valve 5A, and pipeline G5, valve KV3, pipeline G13 flow out.Replacement completion, shut off valve 6A, 5A.CO2 concentration height in the displacement effluent gases contains CO, CH4, N2, H2, gas simultaneously.But this portion gas emptying or use it for anything else is returned the unstripped gas system after also can pressurizeing.Present embodiment is emptying.
9. evacuation step VC
Open sequencing valve 8A, CO2 product gas is through valve 8A, and pipeline G8, vavuum pump P1 are evacuated in the CO2 product surge tank V1, evacuation pressure-0.075 in the tower~-0.085MPa.Find time to finish, close 8A.
10. three R3 that all boost
Open sequencing valve 4C, 7A, through valve 4C, pipeline G4, G9, G7, valve 7A accept to boost from the three equal step-down gases that the C tower comes, and close 4C, 7A after the two pressure tower equilibriums.
11. isolate I1 for the first time
All sequencing valves of A tower are in closed condition, wait pending next step.
12. two R2 that all boost
Open 4D, 7A, through valve 4D, pipeline G4, G9, (G7, valve 7A accept to boost from the two equal step-down gases that the D tower comes, and close 4D, 7A after the two pressure tower equilibriums.
13. for the second time every I2
All sequencing valves of A tower are in closed condition, wait pending next step.
14. the R1 that all boosts
Open sequencing valve 3A, 3E, through valve 3E, pipeline G3, valve 3A accept the equal step-down gas lift pressure that the E tower comes, and after the two pressure tower equilibriums, close 3E.
The FR 15. finally boost
Open sequencing valve KV1,3A, difficult absorbed component product gas N2, H2 purified gas charge into adsorption tower through KV1, pipeline G11, G3, valve 3A against the absorption direction, after pressure is charged to adsorptive pressure, close KV1,3A.
So far, the A tower has been finished a circulation, can enter next circulation again, and other tower is the same with the circulation step of A tower, just staggers mutually on the time.
The present embodiment result is a products C O2 purity 99.2%, yield 85%; In the difficult absorbed component product, N2 yield 98%, H2 yield 99%, wherein CO2<0.2% (V).
Embodiment 2:
Fig. 1 is a process chart, is raw material with conversion gas, presses the program operation of Fig. 3.Compare not suitable putting after the three equal step-downs with embodiment 1; Supercharger outlet pressure 0.15MPa, displacement step is carried out under the condition of gauge pressure 0.15MPa, carries out the contrary rapid D that strides after the replacement completion, the CO2 product is through program control KV4 in the tower, pipeline G6, G14 are contrary to put into easy adsorption production surge tank V1, vacuumizes step then, and other step is identical with enforcement 1.
The present embodiment result is products C O2 purity 99.5%, CO2 yield 87%; N2 yield 96% in the difficult absorbed component product, H2 yield 98%.
Embodiment 3:
Working procedure such as Fig. 2, technological process such as Fig. 1, with air as unstripped gas, adsorptive pressure 0.1MPa, easily absorbed component is N2, difficult absorbed component is O2, adsorbent is selected zeolite molecular sieve for use.Operating procedure and embodiment 1 are together.
The result is as follows: product N2 purity 99.9%, yield 75%, product O2 purity 93%, yield 55%.

Claims (9)

1, a kind of from gaseous mixture purify easy absorption simultaneously mutually and difficult absorption pressure-changeable gas-adsorption separation method mutually, the method is only used one section PSA device, each adsorption tower in the device comprises the steps:
(1) under adsorptive pressure, unstripped gas is fed adsorption tower, from unstripped gas, selects the easy absorbed component of absorption,
(2) adsorb LA again:
When in the difficult absorbed component product gas of the exit of adsorption tower easily the absorbed component impurity content soon surpass when requiring, unstripped gas continues to feed this tower and adsorbs, easily the absorption forward position of absorbed component continues to push ahead, easily the absorbed component impurity content flows out without this tower product gas outlet valve above the difficult absorbed component gas that requires, but from flowing out with another valve of end
(3) go out the interior difficult absorbed component gas of tower with easy absorbed component gas displacement,
(4) vacuumize easy adsorption production,
(5) adsorb FA in advance:
Another valve of LA step flows out impurity content and surpasses the difficult absorbed component gas that requires and enter another and just finished the adsorption tower that difficult absorbed component product boosts and adsorb in advance.
2, method according to claim 1 is characterized in that each tower comprises pre-absorption FA successively, adsorbs A, adsorbs LA, drop pressure D again, easily adsorbs phase product gas displacement P, vacuumizes VC, and boost pressure R, difficult absorption phase product gas lift are pressed the FR step.
3, method according to claim 2 is characterized in that after drop pressure D step, easily adsorbs before the phase product gas displacement P, has forward to put and presses step PP.
4, method according to claim 2 is characterized in that vacuumizing before the VC step after easily absorption phase product gas is replaced the P step, has reverse putting to press step D.
5,, it is characterized in that between drop pressure D and boost pressure R step, isolation step I being arranged according to claim 1 or 2 or 3 or 4 described methods.
6,, it is characterized in that between drop pressure D or boost pressure R step, isolation step I being arranged according to claim 1 or 2 or 3 or 4 described methods.
7, according to claim 1 or 2 or 3 or 4 described methods, it is characterized in that all pressing number of times is 1-7 time.
8, according to claim 1 or 2 or 3 or 4 described methods, the number that it is characterized in that adsorption tower is the 3-24 platform.
9,, it is characterized in that every tower carries out following steps successively: (is example with the A tower) according to claim 1 or 2 or 3 or 4 described methods.
(1) adsorb FA in advance:
Difficult adsorption production gas lift is pressed in the A tower, and the adsorbed gas again of F tower enters pre-absorption from A tower lower end, and difficult adsorption production gas flows out from A tower upper end to be collected, close during end with the F tower to be connected control valve,
(2) absorption A:
Unstripped gas enters from A tower lower end, easily absorption absorption mutually, and qualified difficulty absorption phase product gas continuation is flowed out from A tower upper end and is collected.Adsorb the forward position mutually to certain position when easy absorption, close difficult absorption phase outflow pathway,
(3) adsorb LA again:
Unstripped gas continues to enter the A tower from the lower end, and working off one's feeling vent one's spleen on the A tower enters the B tower adsorbs in advance,
(4) one equal step-down D1:
Gas enters the C tower on entering and finishing the two C towers that all boost in the A tower, closes path after A, the equilibrium of C pressure tower,
(5) two equal step-down D2:
Gas enters the D tower in the A tower, closes path after the isostasy,
(6) three equal step-down D3:
Gas enters the E tower of finishing evacuation step in the A tower, closes path after the two pressure tower equilibriums,
(7) along putting PP:
A tower gas is emitted along the absorption direction, closes path after near normal pressure.Return the unstripped gas system after the suitable venting pressurization,
(8) displacement P:
Pure easy absorption phase product gas is through being pressurized to a little more than normal pressure, enter the A tower from the lower end, along the absorption direction the difficult absorbed component in the A tower is cemented out, the difficult absorbed component product gas that displaces flows out through KV3 to be collected, replacement completion is closed the collection path, and displacement effluent gases emptying or it are used, close and emit vein relaxing
(9) VC that finds time:
Open vavuum pump, the easy absorption phase product gas in the tower A extracted out from the lower end, find time to finish, close path,
(10) three R3 that all boost:
The three equal step-down gases that the C tower is accepted in A tower lower end boost, and after the two pressure tower equilibriums, close path,
(11) isolate I1 for the first time:
All sequencing valves of A tower are in closes,
(12) two R2 that all boost:
The A tower is accepted to boost from the two equal step-down gases that the D tower comes, and closes vein relaxing after the two pressure tower equilibriums,
(13) isolate I2 for the second time:
All sequencing valves of A tower are in closed condition,
(14) one R1 that all boost:
The A tower is accepted the equal step-down gas lift pressure that the E tower comes, and closes path after the two pressure tower equilibriums,
(15) FR that finally boosts:
The A tower charges into difficult absorbed component product gas from the upper end against the absorption direction, after pressure is charged to adsorptive pressure, closes path.
CN98111832A 1998-01-24 1998-01-24 Pressure swing adsorption gas separation method capable of simultaneously purifying adsorbable phase and non-adsorbable phase from mixed gas Pending CN1195572A (en)

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CN1089019C (en) * 1999-06-05 2002-08-14 湖北宜化集团有限责任公司 Method for stabilizing outlet pressure of pressure changing adsorption vacuum pump by using air cabinet
CN1126585C (en) * 1999-06-05 2003-11-05 湖北宜化集团有限责任公司 Variable-pressure adsorption separating method for simultaneously purifying easy-to-adsorb phase and difficult-to-adsorb phase
CN101108295B (en) * 2007-05-18 2012-05-09 刘明 Method of removing CO2 from switch gas by pressure swing adsorption with replacing and recycling step
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CN104128073A (en) * 2014-08-09 2014-11-05 湖南三箭自控科技有限公司 Novel saturation adsorption process of pressure swing adsorption decarburization and device thereof
CN105600752A (en) * 2016-03-29 2016-05-25 河北天善生物技术有限公司 Method and system for purifying hydrogen gas in biomass gas
CN105600752B (en) * 2016-03-29 2018-04-17 河北天善生物技术有限公司 A kind of method of purification and its system for being used for hydrogen in biological fuel gas
WO2018108067A1 (en) * 2016-12-13 2018-06-21 北京信诺海博石化科技发展有限公司 Pressure swing adsorption process comprising concentrated waste gas pre-adsorption step
CN107349746A (en) * 2017-08-29 2017-11-17 四川天采科技有限责任公司 The pressure swing absorption process of pressure change coordinated signals in a kind of circulate operation
CN107349746B (en) * 2017-08-29 2019-12-17 四川天采科技有限责任公司 Pressure swing adsorption method for linkage control of pressure change in cyclic operation
CN109126381A (en) * 2018-09-13 2019-01-04 北京北大先锋科技有限公司 A kind of method that pressure-variable adsorption removes carbon dioxide in industrial gasses
CN109126381B (en) * 2018-09-13 2021-06-04 北京北大先锋科技有限公司 Method for removing carbon dioxide in industrial gas through pressure swing adsorption
CN113041782A (en) * 2021-03-15 2021-06-29 西南化工研究设计院有限公司 Gas pressure swing adsorption separation and purification system and separation and purification method thereof

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