CN102701151A - High-purity and high-recovery hydrogen purifying method and realizing device - Google Patents
High-purity and high-recovery hydrogen purifying method and realizing device Download PDFInfo
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Abstract
The invention discloses a high-purity and high-recovery hydrogen purifying method and a realizing device. The hydrogen purifying method comprises the following steps: a) performing first-level pressure swing adsorption; b) performing second-level pressure swing adsorption; c) regenerating from the first-level pressure swing adsorption; and e) regenerating from the second-level pressure swing adsorption. The realizing device comprises a gas inlet pipe (1), at least three first adsorption towers (2), a first converse discharging pipe (3), a gas outlet pipe (4), a vacuum pump (8), at least three second adsorption towers (9), a second converse discharging pipe (10), a membrane component (13) and a buffer tank (14). By adopting the method and device provided by the invention, the scale of a pressure swing adsorption device is reduced, the methane yield is increased and the cost is lowered.
Description
Technical field
The present invention relates to the hydrogen purification field, specifically is the hydrogen purification method and the implement device of a kind of high purity, high-recovery.
Background technology
Pressure swing adsorption (PSA) can both be used for splitting gas with the membrane separation technique dual mode and produce hydrogen.Pressure swing adsorption (PSA) is produced 99.9% above high-purity hydrogen, in small-scale one-part form transformation absorption device for producing hydrogen, uses, for improving yield; Reduce running cost; Adopt repeatedly and all press, but its hydrogen yield generally can not surpass 92%, and one-time investment is also bigger.For a long time; Because the characteristic of pressure swing adsorption (PSA); Product hydrogen yield and product hydrogen purity are inversely proportional to, and cause under the requirement of high purity product hydrogen, and the product hydrogen yield is not high; Therefore, in existing pressure swing adsorption (PSA), produce and caused the huge wasting of resources in the high-purity hydrogen process.
In process for making hydrogen, also adopted membrane separation technique, though adopt membrane separation technique to cut down the consumption of energy, reduced one-time investment, yield is also high, and the hydrogen purity of being produced generally can not surpass 99.8%, and its index can't reach high purity.
Summary of the invention
The invention provides the hydrogen purification method and the implement device of a kind of high purity, high-recovery, compare traditional hydrogen purification production technique, can reduce the scale of pressure-swing absorption apparatus, improve hydrogen yield, reduce cost.
The present invention mainly realizes through following technical scheme for the technical solution problem: the hydrogen purification method of a kind of high purity, high-recovery: may further comprise the steps:
The absorption of a, first order transformation: with composition is that hydrogen content is 75%, carbon dioxide content is 24.5%, carbon monoxide content is 0.5%, pressure is 1.2Mpa unstripped gas by certain time interval; Divide the different periods; Send in the first order adsorption tower one by one in order; Filling hydrogen purification adsorbent in the first order adsorption tower; Utilization is to the different adsorption capacities of different component; Carbon dioxide in the unstripped gas is adsorbed; Effectively pneumatolytic divides hydrogen and other foreign gas as the then output from first order adsorption tower top of middle gas, and this moment, the content of hydrogen was about 95%;
B, the absorption of second level transformation: the middle gas of output is by certain time interval from first order adsorption tower top; Divide the different periods; Get in the adsorption tower of the second level one by one in order; Filling hydrogen purification adsorbent in the adsorption tower of the second level; Utilization is to the different adsorption capacities of different component; With residual carbon dioxide and carbon monoxide absorption in the middle gas; Effectively pneumatolytic divides the then adsorption tower top output from the second level of hydrogen; Give the user through outlet valve with product hydrogen carrying device, this moment, the content of hydrogen was more than 99.9%;
C, first order transformation absorption regeneration: after middle gas is accomplished through absorption in 240 seconds in the adsorption tower of the second level; Earlier first order adsorption tower is carried out equal pressure drop; Then carry out contrary putting; Hydrogen content is less than 10% in contrary venting this moment, and directly emptying is then found time; After finding time to accomplish; With covering in the airfree first order adsorption tower in the adsorption tower of the second level, in first order adsorption tower, accomplish equal voltage rise at last, fill eventually, thereby accomplish whole regenerative process against putting back to getter;
D, second stage transformation absorption regeneration: after middle gas is accomplished through absorption in 240 seconds in the adsorption tower of the second stage; Earlier second stage adsorption tower is carried out equal pressure drop; Then carry out contrary putting, and will be temporary in the surge tank, will cover in the airfree first step adsorption tower against venting then against venting; In the adsorption tower of the second stage, accomplish equal voltage rise at last, fill eventually, thereby accomplish its whole regenerative process.
The detailed process of said step c is:
C1, all pressure drops: after adsorption process finishes, along the absorption direction the higher gas of first step adsorption tower internal pressure is put into other and accomplished the lower first step adsorption tower of regenerated pressure; This process is not only the step-down process, reclaims the process of effective gas of bed dead space especially, and the bed dead space is promptly failed the part effectively utilized in the adsorption tower, and contained gaseous fraction is an available gas hydrogen in the bed space;
C2, contrary putting: adsorption tower is accomplished after last all pressure drops, against the absorption direction pressure in the first step adsorption tower is reduced near normal pressure, hydrogen content less than 10% in the contrary venting that obtains this moment, and all the other are CO
2Deng impurity;
C3, contrary put completion after, first step adsorption tower is vacuumized processing;
After c4, the completion of finding time, first step adsorption tower is boosted, initial once covers the recovery gas in the recovery gas surge tank of second stage transformation absorption regeneration to first step adsorption tower exactly, is called tentatively and boosts;
C5, all voltage rises: after the completion of tentatively boosting, successively this adsorption tower is boosted with the higher hydrogen of other first step adsorption tower internal pressure; This process promptly is the process of boosting with all the pressure drop process is corresponding, also is the process that reclaims the hydrogen of bed dead space in other adsorption towers;
C6, after accomplishing last all voltage rises, through filling eventually, slowly and reposefully the pressure in the first step adsorption tower is risen to adsorptive pressure with product gas.Doing like this is in order first step adsorption tower can be switched to reposefully adsorb and to guarantee that product purity and pressure do not fluctuate in this course next time,
The detailed process of said steps d is:
D1, all pressure drops: after adsorption process finishes, the second stage higher gas of adsorption tower internal pressure is put into the second stage adsorption tower that other has accomplished the regenerated lower pressure along the absorption direction; This process is not only the step-down process, reclaims the process of the hydrogen of bed dead space especially;
D2, along putting: after accomplishing equal pressure drop process, emit purified hydrogen, be in the purge gas of rinse step adsorption tower, make the sorbent material of purge column obtain regeneration as another one along the direction of absorption;
D3, contrary putting: adsorption tower is accomplished after last all pressure drops; Against the absorption direction pressure in the adsorption tower of the second stage is reduced near normal pressure; The contrary venting of a part is put into surge tank and is kept in before during contrary putting behind film separation unit; Contrary contrary venting emptying of putting the later stage obtains hydrogen content and is about 50% ~ 60% in surge tank;
D4, wash and vacuumize: contrary put completion after, second stage adsorption tower is washed processing, first step adsorption tower is vacuumized processing;
After d5, the completion of finding time, first step adsorption tower is boosted, initial once is exactly that the contrary venting in the recovery gas surge tank of second stage transformation absorption regeneration is covered to first step adsorption tower, is called tentatively and boosts;
D6, boost: after flushing is accomplished, successively this adsorption tower is boosted with the hydrogen of elevated pressures in other second stage adsorption tower; This process is the process of boosting with all the pressure drop process is corresponding, also is the process that reclaims the hydrogen of bed dead space in other adsorption tower;
D7, fill eventually: after accomplishing last all voltage rises,, slowly and reposefully the pressure in the adsorption tower of the second stage is risen to adsorptive pressure with product gas through filling eventually.Doing like this is to adsorb for second stage adsorption tower can be switched to next time reposefully, and guarantees that product purity and pressure do not fluctuate in this course.
A kind of device of realizing the hydrogen purification method of above-mentioned high purity, high-recovery; Comprise inlet pipe, at least 3 first adsorption towers, first contrary pipe, escape pipe, vacuum pump, at least 3 second adsorption towers, second contrary pipe, membrane module and the surge tank put put; Said inlet pipe, first is communicated with first adsorption tower through the pipeline that is provided with pneumatic cut-off valve respectively against putting pipe; Said vacuum pump is communicated with the first contrary pipe of putting through the pipeline that is provided with pneumatic cut-off valve; Said first adsorption tower is communicated with second adsorption tower through the pipeline that is provided with pneumatic adjusting valve; Said second contrary put pipe, escape pipe is communicated with second adsorption tower through the pipeline that is provided with pneumatic cut-off valve; The pipeline of said membrane module through being provided with pneumatic cut-off valve contraryly put pipe with second respectively, surge tank is communicated with; Said surge tank is communicated with first adsorption tower through the pipeline that is provided with pneumatic cut-off valve, and said first adsorption tower also is connected with first respectively through the pipeline that is provided with pneumatic cut-off valve and fills pipe, first equaler eventually, and the pipeline that said second adsorption tower is provided with pneumatic cut-off valve also is connected with second whole pipe, second equaler of filling respectively.
Also be provided with pneumatic adjusting valve on the said escape pipe.
Said first adsorption tower has 4, and said second adsorption tower also has 4.
The present invention compared with prior art has the following advantages and beneficial effect: the present invention has the dual characteristics of membrane separation technique and pressure swing adsorption, virgin gas after pre-treatment, through membrane module with impure gas CO
2In the per-meate side emptying, middle gas gets into first surge tank by non-per-meate side, then gets into adsorption tower and carries out transformation absorption.Contrary the putting of pressure swing adsorption system installed second membrane module additional on the pipe, and in the non-per-meate side of second membrane module second surge tank is set, and non-infiltration gas covers in the adsorption tower that exhausts vacuum in second surge tank, accomplishes eventually and fills.So not only improved the methane yield, also reduced the scale of pressure-swing absorption apparatus, thereby made cost lower.
Description of drawings
Fig. 1 is the structural representation of hydrogen purification device.
Pairing Reference numeral is in the accompanying drawing: 1, inlet pipe, 2, first adsorption tower, 3, the first contrary pipe of putting, 4, escape pipe; 5, first eventually fills pipe, 6, first equaler, 7, pneumatic adjusting valve, 8, vacuum pump; 9, second adsorption tower, 10, the second contrary pipe of putting, 11, second fills pipe eventually; 12, second equaler, 13, membrane module, 14, surge tank.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed description, but embodiment of the present invention is not limited thereto.
Embodiment:
A kind of high purity of present embodiment, the hydrogen purification method of high-recovery: may further comprise the steps:
The absorption of a, first order transformation: with composition is that hydrogen content is 75%, carbon dioxide content is 24.5%, carbon monoxide content is 0.5%, pressure is 1.2Mpa unstripped gas by certain time interval; Divide the different periods; Send in the first order adsorption tower one by one in order; Filling hydrogen purification adsorbent in the first order adsorption tower; Utilization is to the different adsorption capacities of different component; Carbon dioxide in the unstripped gas is adsorbed; Effectively pneumatolytic divides hydrogen and other foreign gas as the then output from first order adsorption tower top of middle gas, and this moment, the content of hydrogen was about 95%;
B, the absorption of second level transformation: the middle gas of output is by certain time interval from first order adsorption tower top; Divide the different periods; Get in the adsorption tower of the second level one by one in order; Filling hydrogen purification adsorbent in the adsorption tower of the second level; Utilization is to the different adsorption capacities of different component; With residual carbon dioxide and carbon monoxide absorption in the middle gas; Effectively pneumatolytic divides the then adsorption tower top output from the second level of hydrogen; Give the user through outlet valve with product hydrogen carrying device, this moment, the content of hydrogen was more than 99.9%;
C, first order transformation absorption regeneration: after middle gas is accomplished through absorption in 240 seconds in the adsorption tower of the second level; Earlier first order adsorption tower is carried out equal pressure drop; Then carry out contrary putting; Hydrogen content is less than 10% in contrary venting this moment, and directly emptying is then found time; After finding time to accomplish; With covering in the airfree first order adsorption tower in the adsorption tower of the second level, in first order adsorption tower, accomplish equal voltage rise at last, fill eventually, thereby accomplish whole regenerative process against putting back to getter;
D, second stage transformation absorption regeneration: after middle gas is accomplished through absorption in 240 seconds in the adsorption tower of the second stage; Earlier second stage adsorption tower is carried out equal pressure drop; Then carry out contrary putting, and will be temporary in the surge tank, will cover in the airfree first step adsorption tower against venting then against venting; In the adsorption tower of the second stage, accomplish equal voltage rise at last, fill eventually, thereby accomplish its whole regenerative process.
The detailed process of said step c is:
C1, all pressure drops: after adsorption process finishes, along the absorption direction the higher gas of first step adsorption tower internal pressure is put into other and accomplished the lower first step adsorption tower of regenerated pressure;
C2, contrary putting: adsorption tower is accomplished after last all pressure drops, against the absorption direction pressure in the first step adsorption tower is reduced near normal pressure, hydrogen content less than 10% in the contrary venting that obtains this moment, and all the other are CO
2Deng impurity;
C3, contrary put completion after, first step adsorption tower is vacuumized processing;
After c4, the completion of finding time, first step adsorption tower is boosted, initial once covers the recovery gas in the recovery gas surge tank of second stage transformation absorption regeneration to first step adsorption tower exactly, is called tentatively and boosts;
C5, all voltage rises: after the completion of tentatively boosting, successively this adsorption tower is boosted with the higher hydrogen of other first step adsorption tower internal pressure;
C6, after accomplishing last all voltage rises, through filling eventually, slowly and reposefully the pressure in the first step adsorption tower is risen to adsorptive pressure with product gas.
The detailed process of said steps d is:
D1, all pressure drops: after adsorption process finishes, the second stage higher gas of adsorption tower internal pressure is put into the second stage adsorption tower that other has accomplished the regenerated lower pressure along the absorption direction; This process is not only the step-down process, reclaims the process of effective gas of bed dead space especially;
D2, along putting: after accomplishing equal pressure drop process, emit purified hydrogen, be in the purge gas of rinse step adsorption tower, make the sorbent material of purge column obtain regeneration as another one along the direction of absorption;
D3, contrary putting: adsorption tower is accomplished after last all pressure drops; Against the absorption direction pressure in the adsorption tower of the second stage is reduced near normal pressure; The contrary venting of a part is put into surge tank and is kept in before during contrary putting behind film separation unit; Contrary contrary venting emptying of putting the later stage obtains hydrogen content and is about 50% ~ 60% in surge tank;
D4, wash and vacuumize: contrary put completion after, second stage adsorption tower is washed processing, first step adsorption tower is vacuumized processing;
After d5, the completion of finding time, first step adsorption tower is boosted, initial once is exactly that the contrary venting in the recovery gas surge tank of second stage transformation absorption regeneration is covered to first step adsorption tower, is called tentatively and boosts;
D6, boost: after flushing is accomplished, successively this adsorption tower is boosted with the hydrogen of elevated pressures in other second stage adsorption tower;
D7, fill eventually: after accomplishing last all voltage rises,, slowly and reposefully the pressure in the adsorption tower of the second stage is risen to adsorptive pressure with product gas through filling eventually.
As shown in Figure 1; The high purity of present embodiment, the hydrogen purification device of high-recovery; Comprise 1, at least 3 first adsorption towers of inlet pipe, 2, first contrary pipe 3, escape pipe 4,8, at least 3 second adsorption towers of vacuum pump, 9, second contrary pipe 10, membrane module 13 and the surge tank 14 put put; Inlet pipe 1, the first contrary pipe 3 of putting is communicated with first adsorption tower 2 through the pipeline that is provided with pneumatic cut-off valve respectively, and vacuum pump 8 is communicated with the first contrary pipe 3 of putting through the pipeline that is provided with pneumatic cut-off valve.
The pipeline of the membrane module 13 of present embodiment through being provided with pneumatic cut-off valve contraryly put pipe 10 with second respectively, surge tank 14 is communicated with, and surge tank 14 is communicated with first adsorption tower 2 through the pipeline that is provided with pneumatic cut-off valve.
Also be provided with pneumatic adjusting valve 7 on the escape pipe 4 of present embodiment.
As preferably, first adsorption tower 2 of present embodiment has 4, and second adsorption tower 9 also has 4.
The principle of work of present embodiment: at first, virgin gas gets into from inlet pipe 1, get into first adsorption tower 2, the first adsorption towers, 2 absorption impurity wherein then after, get into second adsorption tower, 9, the second adsorption towers 9 and adsorb impurity once more; First adsorption tower 2 is after accomplishing adsorption process; Regenerate, detailed process is that the pneumatic cut-off valve of opening earlier between first equaler 6 and first adsorption tower 2 carries out equal pressure drop; Opening the first contrary pneumatic cut-off valve of putting between pipe 3 and first adsorption tower 2 then realizes against putting and vacuumizing; Middle gas gets into second adsorption tower 9 and carries out absorption second time, remove impurity after, through escape pipe 4 the product pneumatic transmission is gone out device to the user.After second adsorption tower 9 is accomplished adsorption process; Regenerate; Detailed process is that the pneumatic cut-off valve of opening earlier between second equaler 12 and second adsorption tower 9 carries out equal pressure drop, opens the second contrary pneumatic cut-off valve of putting between pipe 10 and second adsorption tower 9 then and realizes against putting and vacuumizing; Let slip in the journey contrary; Open the membrane module 13 and the second contrary pneumatic cut-off valve of putting between pipe 10 and membrane module 13 and the surge tank 14, contained hydrogen in the contrary venting of per-meate side recovery of membrane module 13, and be temporary in the surge tank 14; Second adsorption tower 9 is contrary put completion after; Close the membrane module 13 and the second contrary pneumatic cut-off valve of putting between the pipe 10; Opening vacuum pump 8 and first vacuumizes against the pneumatic cut-off valve of putting between the pipe 3; After completion vacuumizes, the infiltration gas in the surge tank 14 is covered in evacuated first adsorption tower 2, accomplish and ooze gas-pervious recovery; Last first adsorption tower 2 is realized equal voltage rise by first equaler 6 again, fills pipe 5 eventually by first and accomplishes whole filling, thereby accomplish whole regenerative process.
Claims (6)
1. the hydrogen purification method of a high purity, high-recovery is characterized in that: may further comprise the steps:
The absorption of a, first order transformation: with composition is that hydrogen content is 75%, carbon dioxide content is 24.5%, carbon monoxide content is 0.5%, pressure is 1.2Mpa unstripped gas by certain time interval; Divide the different periods; Send in the first order adsorption tower one by one in order; Filling hydrogen purification adsorbent in the first order adsorption tower; Utilization is to the different adsorption capacities of different component; Carbon dioxide in the unstripped gas is adsorbed; Effectively pneumatolytic divides hydrogen and other foreign gas as the then output from first order adsorption tower top of middle gas, and this moment, the content of hydrogen was about 95%;
B, the absorption of second level transformation: the middle gas of output is by certain time interval from first order adsorption tower top; Divide the different periods; Get in the adsorption tower of the second level one by one in order; Filling hydrogen purification adsorbent in the adsorption tower of the second level; Utilization is to the different adsorption capacities of different component; With residual carbon dioxide and carbon monoxide absorption in the middle gas; Effectively pneumatolytic divides the then adsorption tower top output from the second level of hydrogen; Give the user through outlet valve with product hydrogen carrying device, this moment, the content of hydrogen was more than 99.9%;
C, first order transformation absorption regeneration: after middle gas is accomplished through absorption in 240 seconds in the adsorption tower of the second level; Earlier first order adsorption tower is carried out equal pressure drop; Then carry out contrary putting; Hydrogen content is less than 10% in contrary venting this moment, and directly emptying is then found time; After finding time to accomplish; With covering in the airfree first order adsorption tower in the adsorption tower of the second level, in first order adsorption tower, accomplish equal voltage rise at last, fill eventually, thereby accomplish whole regenerative process against putting back to getter;
D, second stage transformation absorption regeneration: after middle gas is accomplished through absorption in 240 seconds in the adsorption tower of the second stage; Earlier second stage adsorption tower is carried out equal pressure drop; Then carry out contrary putting, and will be temporary in the surge tank, will cover in the airfree first step adsorption tower against venting then against venting; In the adsorption tower of the second stage, accomplish equal voltage rise at last, fill eventually, thereby accomplish its whole regenerative process.
2. a kind of high purity according to claim 1, high-recovery hydrogen purification method, it is characterized in that: the detailed process of said step c is:
C1, all pressure drops: after adsorption process finishes, along the absorption direction the higher gas of first step adsorption tower internal pressure is put into other and accomplished the lower first step adsorption tower of regenerated pressure;
C2, contrary putting: adsorption tower is accomplished after last all pressure drops, against the absorption direction pressure in the first step adsorption tower is reduced near normal pressure, hydrogen content less than 10% in the contrary venting that obtains this moment, and all the other are CO
2Deng impurity;
C3, contrary put completion after, first step adsorption tower is vacuumized processing;
After c4, the completion of finding time, first step adsorption tower is boosted, initial once covers the recovery gas in the recovery gas surge tank of second stage transformation absorption regeneration to first step adsorption tower exactly, is called tentatively and boosts;
C5, all voltage rises: after the completion of tentatively boosting, successively this adsorption tower is boosted with the higher hydrogen of other first step adsorption tower internal pressure;
C6, after accomplishing last all voltage rises, through filling eventually, slowly and reposefully the pressure in the first step adsorption tower is risen to adsorptive pressure with product gas.
3. the hydrogen purification method of a kind of high purity according to claim 1, high-recovery is characterized in that: the detailed process of said steps d is:
D1, all pressure drops: after adsorption process finishes, the second stage higher gas of adsorption tower internal pressure is put into the second stage adsorption tower that other has accomplished the regenerated lower pressure along the absorption direction;
D2, along putting: after accomplishing equal pressure drop process, emit purified hydrogen, be in the purge gas of rinse step adsorption tower, make the sorbent material of purge column obtain regeneration as another one along the direction of absorption;
D3, contrary putting: adsorption tower is accomplished after last all pressure drops; Against the absorption direction pressure in the adsorption tower of the second stage is reduced near normal pressure; The contrary venting of a part is put into surge tank and is kept in before during contrary putting behind film separation unit; Contrary contrary venting emptying of putting the later stage obtains hydrogen content and is about 50% ~ 60% in surge tank;
D4, wash and vacuumize: contrary put completion after, second stage adsorption tower is washed processing, first step adsorption tower is vacuumized processing;
After d5, the completion of finding time, first step adsorption tower is boosted, initial once is exactly that the contrary venting in the recovery gas surge tank of second stage transformation absorption regeneration is covered to first step adsorption tower, is called tentatively and boosts;
D6, boost: after flushing is accomplished, successively this adsorption tower is boosted with the hydrogen of elevated pressures in other second stage adsorption tower;
D7, fill eventually: after accomplishing last all voltage rises,, slowly and reposefully the pressure in the adsorption tower of the second stage is risen to adsorptive pressure with product gas through filling eventually.
4. device of realizing the hydrogen purification method of each described a kind of high purity of claim 1 ~ 3, high-recovery; It is characterized in that: comprise inlet pipe (1), at least 3 first adsorption towers (2), first contrary pipe (3), escape pipe (4), vacuum pump (8), at least 3 second adsorption towers (9), second contrary pipe (10), membrane module (13) and the surge tank (14) put put; Said inlet pipe (1), first is communicated with first adsorption tower (2) through the pipeline that is provided with pneumatic cut-off valve respectively against putting pipe (3); Said vacuum pump (8) is communicated with against putting pipe (3) with first through the pipeline that is provided with pneumatic cut-off valve; Said first adsorption tower (2) is communicated with second adsorption tower (9) through the pipeline that is provided with pneumatic adjusting valve (7); Said second contrary put pipe (10), escape pipe (4) is communicated with second adsorption tower (9) through the pipeline that is provided with pneumatic cut-off valve; The pipeline of said membrane module (13) through being provided with pneumatic cut-off valve contraryly put pipe (10) with second respectively, surge tank (14) is communicated with; Said surge tank (14) is communicated with first adsorption tower (2) through the pipeline that is provided with pneumatic cut-off valve; Said first adsorption tower (2) also is connected with first respectively through the pipeline that is provided with pneumatic cut-off valve and fills pipe (5), first equaler (6) eventually, and the pipeline that said second adsorption tower (9) is provided with pneumatic cut-off valve also is connected with second whole pipe (11), second equaler (12) of filling respectively.
5. the implement device of the hydrogen purification method of a kind of high purity according to claim 4, high-recovery is characterized in that: also be provided with pneumatic adjusting valve (7) on the said escape pipe (4).
6. the implement device of the hydrogen purification method of a kind of high purity according to claim 4, high-recovery is characterized in that: said first adsorption tower (2) has 4, and said second adsorption tower (9) also has 4.
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| CN108310909A (en) * | 2017-01-17 | 2018-07-24 | 四川天采科技有限责任公司 | A method of p-phthalic acid's tail gas pressure-variable adsorption containing CO extracts H2 |
| CN108310909B (en) * | 2017-01-17 | 2020-06-19 | 四川天采科技有限责任公司 | Method for extracting H2 from CO-containing purified terephthalic acid tail gas through pressure swing adsorption |
| CN108249401A (en) * | 2018-03-22 | 2018-07-06 | 张俊霞 | A kind of hydrogen purification device for raw coke oven gas and gasification of biomass product |
| CN108249401B (en) * | 2018-03-22 | 2023-09-26 | 邵阳学院 | Hydrogen purification device for raw gas and biomass gasification products |
| CN108910824A (en) * | 2018-09-17 | 2018-11-30 | 重庆金苏化工有限公司 | A kind of high-purity hydrogen purification system and method for purification |
| CN108910824B (en) * | 2018-09-17 | 2023-08-04 | 重庆金苏化工有限公司 | High-purity hydrogen purification system and purification method |
| CN112919414A (en) * | 2021-03-15 | 2021-06-08 | 西南化工研究设计院有限公司 | Low-pressure flushing regeneration pressure swing adsorption hydrogen purification system and hydrogen purification method |
| CN112938897A (en) * | 2021-03-18 | 2021-06-11 | 广东众和化塑股份公司 | Hydrogen purification method |
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