CN117101341A - Pressure swing adsorption device - Google Patents
Pressure swing adsorption device Download PDFInfo
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- CN117101341A CN117101341A CN202311292205.7A CN202311292205A CN117101341A CN 117101341 A CN117101341 A CN 117101341A CN 202311292205 A CN202311292205 A CN 202311292205A CN 117101341 A CN117101341 A CN 117101341A
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- adsorption
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 197
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 238000011010 flushing procedure Methods 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 37
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- 239000001257 hydrogen Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 239000003463 adsorbent Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses a pressure swing adsorption device, which relates to the technical field of pressure swing adsorption and comprises an adsorption tower A, an adsorption tower B, an adsorption tower C, an adsorption tower D, an adsorption tower E and an adsorption tower F, wherein feeding pipes are fixedly connected below the adsorption tower A, the adsorption tower B, the adsorption tower E and the adsorption tower F, discharging pipes are fixedly connected to the upper ends of the adsorption tower A, the adsorption tower B, the adsorption tower C, the adsorption tower D, the adsorption tower E and the adsorption tower F, lower-layer components are connected between the six feeding pipes, and upper-layer components are connected between the six discharging pipes. Compared with the conventional pressure swing adsorption device, the invention does not need to arrange complicated adsorption pipelines and bridge wiring, omits the complicated programming and other works, simplifies the structure of an adsorption system, improves the production flexibility and reduces the production operation cost.
Description
Technical Field
The invention relates to the technical field of pressure swing adsorption, in particular to a pressure swing adsorption device.
Background
The principle of pressure swing adsorption is to control the pressure rise and fall to realize the adsorption process.
The conventional pressure swing adsorption device needs to be provided with complicated adsorption pipelines and bridge wiring, has complicated programming work and an adsorption system structure, has higher production and operation cost, and in addition, the conventional pressure swing adsorption technology needs different pipelines from adsorption to pressure equalizing to discharge flushing, and each pipeline port needs an independent program control valve, so that the operation is complicated and the structure is complicated.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a pressure swing adsorption device.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a pressure swing adsorption device, includes adsorption tower A, adsorption tower B, adsorption tower C, adsorption tower D, adsorption tower E and adsorption tower F, adsorption tower A adsorption tower B adsorption tower C adsorption tower D adsorption tower E with the equal fixedly connected with inlet pipe in below of adsorption tower F, just adsorption tower A adsorption tower B adsorption tower C adsorption tower D adsorption tower E with the equal fixedly connected with discharging pipe in upper end of adsorption tower F, six be connected with the lower floor's subassembly between the inlet pipe, six be connected with the upper assembly between the discharging pipe.
Preferably, the lower layer assembly comprises two lower layer rotary valves, six feed pipes are connected with the two lower layer rotary valves through first conveying pipes, one side of each lower layer rotary valve is connected with an input pipe, and the other side of each lower layer rotary valve is connected with an inverted pipe.
Preferably, the upper layer assembly comprises two upper layer rotary valves, six discharging pipes are connected with the two upper layer rotary valves through second conveying pipes, one side of each upper layer rotary valve is connected with an output pipe, the other side of each upper layer rotary valve is connected with a forward discharging pipe and a flushing pipe, and a final charging pipe is further connected between each upper layer rotary valve and the corresponding output pipe.
Preferably, the lower rotary valve and the upper rotary valve both comprise valve bodies, valve sleeves are sleeved outside the valve bodies, and a first flow channel, a second flow channel, a third flow channel, a fourth flow channel, a fifth flow channel, a sixth flow channel, a seventh flow channel and an eighth flow channel are arranged in the valve bodies.
Preferably, the ports of the first flow passage, the second flow passage, the third flow passage, the fourth flow passage, the fifth flow passage, the sixth flow passage, the seventh flow passage and the eighth flow passage are all arranged on the outer surface of the valve body.
Preferably, the valve body is in rotational connection with the valve sleeve.
Preferably, the valve sleeve of the lower rotary valve is provided with a plurality of first through holes, and the first through holes are respectively connected with the first conveying pipe, the input pipe and the reverse discharge pipe.
Preferably, a plurality of second through holes are formed in the valve sleeve of the upper rotary valve, and the second through holes are respectively connected with the second conveying pipe, the output pipe, the forward discharging pipe, the flushing pipe and the final filling pipe.
Preferably, the valve body is in a cylindrical structure.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is compared with the conventional pressure swing adsorption device, the invention does not need to arrange complicated adsorption pipelines and bridge wiring, omits complex programming and other works, simplifies the structure of an adsorption system, improves the production flexibility and reduces the production operation cost;
2. the valve body rotates around the axis of the valve sleeve so that a plurality of through holes are communicated or blocked with ports of the first flow channel, the second flow channel, the third flow channel, the fourth flow channel, the fifth flow channel, the sixth flow channel, the seventh flow channel or the eighth flow channel in a working state, so that the connected corresponding adsorption towers are in the forward, reverse, flushing, uniform descending, uniform ascending, adsorption, final filling and maintaining stages, and are switched among the stages.
Drawings
FIG. 1 is a schematic top view of a pressure swing adsorption apparatus according to the present invention;
FIG. 2 is a schematic diagram of a pressure swing adsorption apparatus according to the present invention;
fig. 3 is a schematic structural diagram of an adsorption tower a, an adsorption tower B, an adsorption tower C, an adsorption tower D, an adsorption tower E, an adsorption tower F and a lower layer assembly of the pressure swing adsorption device according to the present invention;
fig. 4 is a schematic structural diagram of an adsorption tower a, an adsorption tower B, an adsorption tower C, an adsorption tower D, an adsorption tower E, an adsorption tower F and an upper layer assembly of the pressure swing adsorption device according to the present invention;
fig. 5 is a schematic cross-sectional view of a lower rotary valve or an upper rotary valve of a pressure swing adsorption apparatus according to the present invention.
In the figure: 1. an adsorption tower A; 2. an adsorption tower B; 3. an adsorption tower C; 4. an adsorption tower D; 5. an adsorption tower E; 6. an adsorption tower F; 7. a feed pipe; 8. a discharge pipe; 9. a lower rotary valve; 10. a first delivery tube; 11. an input tube; 12. a reverse discharge pipe; 13. an upper rotary valve; 14. a second delivery tube; 15. an output pipe; 16. c, putting the pipe in sequence; 17. a flushing pipe; 18. a final filling pipe; 19. a valve body; 20. a valve sleeve; 21. a first runner; 22. a second flow passage; 23. a flow passage III; 24. a flow passage IV; 25. a fifth runner; 26. a flow passage six; 27. a flow passage seven; 28. and a flow passage eight.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-5, a pressure swing adsorption apparatus comprises an adsorption tower A1, an adsorption tower B2, an adsorption tower C3, an adsorption tower D4, an adsorption tower E5 and an adsorption tower F6, wherein the lower parts of the adsorption tower A1, the adsorption tower B2, the adsorption tower C3, the adsorption tower D4, the adsorption tower E5 and the adsorption tower F6 are fixedly connected with feeding pipes 7, the upper ends of the adsorption tower A1, the adsorption tower B2, the adsorption tower C3, the adsorption tower D4, the adsorption tower E5 and the adsorption tower F6 are fixedly connected with discharging pipes 8, a lower layer component is connected between the six feeding pipes 7, and an upper layer component is connected between the six discharging pipes 8.
The lower layer assembly comprises two lower layer rotary valves 9, six feed pipes 7 are connected with the two lower layer rotary valves 9 through first conveying pipes 10, one side of each lower layer rotary valve 9 is connected with an input pipe 11, and the other side of each lower layer rotary valve 9 is connected with an inverse discharge pipe 12; the upper layer assembly comprises two upper layer rotary valves 13, six discharging pipes 8 are connected with the two upper layer rotary valves 13 through second conveying pipes 14, one side of each upper layer rotary valve 13 is connected with an output pipe 15, the other side of each upper layer rotary valve 13 is connected with a forward discharging pipe 16 and a flushing pipe 17, and a final filling pipe 18 is further connected between each upper layer rotary valve 13 and the corresponding output pipe 15.
The lower rotary valve 9 and the upper rotary valve 13 both comprise a valve body 19, the valve body 19 is in a cylindrical structure, a valve sleeve 20 is sleeved outside the valve body 19, the valve body 19 is rotationally connected with the valve sleeve 20, a motor is arranged outside the valve sleeve 20 and used for driving the valve body 19 to rotate, a first runner 21, a second runner 22, a third runner 23, a fourth runner 24, a fifth runner 25, a sixth runner 26, a seventh runner 27 and an eighth runner 28 are arranged in the valve body 19, ports of the first runner 21, the second runner 22, the third runner 23, the fourth runner 24, the fifth runner 25, the sixth runner 26, the seventh runner 27 and the eighth runner 28 are all arranged on the outer surface of the valve body 19, a plurality of first through holes are arranged on the valve sleeve 20 of the lower rotary valve 9 and are respectively connected with the first conveying pipe 10, the input pipe 11 and the reverse discharge pipe 12, the valve sleeve 20 of the upper rotary valve 13 is provided with a plurality of second through holes which are respectively connected with the second conveying pipe 14, the output pipe 15, the forward-discharge pipe 16, the flushing pipe 17 and the final-filling pipe 18, the lower rotary valve 9 and the upper rotary valve 13 are used for solving the problems of complex operation and complicated structure caused by the fact that different pipelines are needed in each step from adsorption to pressure equalizing to discharge flushing in the prior pressure swing adsorption technology, each pipeline port needs a separate program control valve, the first 21, the second 22, the third 23, the fourth 24, the fifth 25, the sixth 26, the seventh 27 and the eighth 28 channels respectively correspond to forward-discharge, reverse-discharge, flushing, pressure equalizing first, pressure equalizing second, pressure equalizing third, adsorption and final-filling processes, the valve sleeve 20 is coaxially arranged outside the valve body 19, the valve body 19 rotates around the axis of the valve sleeve 20, the first through holes or the second through holes are communicated or blocked with the ports of the first flow channel 21, the second flow channel 22, the third flow channel 23, the fourth flow channel 24, the fifth flow channel 25, the sixth flow channel 26, the seventh flow channel 27 or the eighth flow channel 28 in a working state, so that the connected corresponding adsorption towers are in forward, reverse, flushing, uniform descending, uniform ascending, adsorption, final filling and maintaining stages, and are switched among the stages, in short, the working states of the flow channels can be uniformly switched by the lower rotary valve 9 and the upper rotary valve 13 according to the time sequence, the adsorption cycle time can be automatically adjusted in real time according to the requirements of raw material change and product fluctuation, and the production flexibility is improved.
In the invention, the valve body 19 is rotated and the rotation speed is regulated, different functional flow channels on the valve body 19 are communicated or blocked with different adsorption towers, raw material gas is distributed in each flow channel, the first conveying pipe 10, the input pipe 11, the reverse discharge pipe 12, the second conveying pipe 14, the output pipe 15, the forward discharge pipe 16, the flushing pipe 17, the final charging pipe 18 and each adsorption tower, so that the connected corresponding adsorption towers are in adsorption, uniform descent, uniform ascent, forward discharge, reverse discharge, flushing, final charging and maintaining stages, and the steps are sequentially repeated in a sequence.
Illustrating: two adsorption towers among the adsorption tower A1, the adsorption tower B2, the adsorption tower C3, the adsorption tower D4, the adsorption tower E5 and the adsorption tower F6 are always in a state of simultaneous feeding and adsorption, and the adsorption and regeneration process comprises the steps of adsorption, continuous twice pressure equalizing and depressurization, sequential discharge, reverse discharge, flushing, continuous twice pressure equalizing and pressure boosting, product final pressure boosting and the like, and the specific process is as follows:
1. in the adsorption process, the external high-pressure mixed raw material gas is distributed through a first flow channel 21, a second flow channel 22, a third flow channel 23, a fourth flow channel 24, a fifth flow channel 25, a sixth flow channel 26, a seventh flow channel 27 and an eighth flow channel 28 of the lower rotary valve 9, enters adsorption towers (two adsorption towers are in adsorption states at the same time) in an adsorption state from a feed pipe 7, hydrocarbon impurities in the gas are adsorbed under the action of an adsorbent, and the unadsorbed hydrogen flows out from a discharge pipe 8 as a product and is intensively sent out through a corresponding upper rotary valve 13 and an output pipe 15;
2. equalizing and reducing pressure: after the adsorption is finished, the higher-pressure hydrogen in the tower is put into other regenerated lower-pressure adsorption towers along the adsorption direction through corresponding flow channels six 26, seven 27 and eight 28, and the flow comprises two continuous pressure equalizing and reducing processes;
3. and (3) a forward process: after the pressure equalization is finished, the product hydrogen at the top of the adsorption tower is firstly recycled along the adsorption direction through a corresponding first flow channel 21 of the upper rotary valve 13, and the hydrogen is used as a regeneration air source of the adsorbent;
4. and (3) a reverse playing process: after the forward process is finished, the pressure of the adsorption tower is reduced to be close to normal pressure against the adsorption direction, at the moment, adsorbed impurities begin to desorb from the adsorbent in a large quantity, and desorbed gas is sent out from the feed pipe 7 through the corresponding second flow passage 22 of the lower rotary valve 9;
5. the flushing process comprises the following steps: after the reverse discharge is finished, the recovered forward discharge hydrogen is used for passing through a corresponding upper rotary valve 13 flow channel III 23 to flush the adsorption bed layer against the adsorption direction, so that the partial pressure of impurity components is further reduced, and the adsorbent is thoroughly regenerated;
6. equalizing and boosting: after the flushing process is finished, the adsorption towers are sequentially boosted by the higher-pressure hydrogen from other adsorption towers through the corresponding flow channel six 26, flow channel seven 27 and flow channel eight 28, the process corresponds to a pressure equalizing and reducing process, and the process comprises two continuous pressure equalizing and boosting processes;
7. final boost process: after the pressure equalizing and boosting process is completed, a part of product hydrogen is sent to the corresponding upper rotary valve 13, and the pressure of the adsorption tower is stably increased to the adsorption pressure.
After this process, the adsorption tower completes a complete adsorption-regeneration cycle, and prepares for the next adsorption, and the time sequence switching and the period control of the above seven steps are completed by changing different flow channels connected with a plurality of adsorption towers through a certain rotating speed by the lower rotary valve 9 and the upper rotary valve 13.
Referring to fig. 5, the working states of the adsorption towers refer to the same time t for each step, from the first execution of the step to the twelve steps, a complete adsorption-regeneration cycle is completed, and then the cycle is performed, and as can be seen from the working state diagram of the adsorption towers, two adsorption towers are always in the adsorption hydrogen production state in the process, and two adsorption towers are always in the pressure equalizing state.
The sequence of operating state changes for each column over the cycle is: adsorption-one-average-two-average-sequential-reverse-flushing-two-average-one-average-final-boost-adsorption-next cycle, adsorption takes 4t (four steps), and the rest states take 1t.
Analyzing the process state of each tower in each step sequence according to the working state diagram:
during the step sequence, the adsorption tower A1 is in an adsorption process, the adsorption tower B2 is in an average pressure increasing process, the adsorption tower C3 is in a flushing process, the adsorption tower D4 is in a sequential discharge process, the adsorption tower E5 is in an average pressure decreasing process, and the adsorption tower F6 is in an adsorption process; in the second step, the adsorption tower A1 is still in the adsorption process, the adsorption tower B2 is switched to the final pressure increasing process, the adsorption tower C3 is switched to the two-uniform pressure increasing process, the adsorption tower D4 is switched to the reverse discharging process, the adsorption tower E5 is switched to the two-uniform pressure decreasing process, and the adsorption tower F6 is still in the adsorption process; by the third step, the adsorption tower A1 is still in the adsorption process, the adsorption tower B2 is switched to the adsorption process, the adsorption tower C3 is switched to the uniform pressure increasing process, the adsorption tower D4 is switched to the flushing process, the adsorption tower E5 is switched to the sequential discharge process, and the adsorption tower F6 is switched to the uniform pressure decreasing process; step four through step twelve, and so on.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. The utility model provides a pressure swing adsorption device, includes adsorption tower A (1), adsorption tower B (2), adsorption tower C (3), adsorption tower D (4), adsorption tower E (5) and adsorption tower F (6), its characterized in that, adsorption tower A (1) adsorption tower B (2) adsorption tower C (3) adsorption tower D (4) adsorption tower E (5) with equal fixedly connected with inlet pipe (7) in below of adsorption tower F (6), just adsorption tower A (1) adsorption tower B (2) adsorption tower C (3) adsorption tower D (4) adsorption tower E (5) with equal fixedly connected with discharging pipe (8) in upper end of adsorption tower F (6), six be connected with the lower floor's subassembly between inlet pipe (7), six be connected with the upper assembly between discharging pipe (8).
2. Pressure swing adsorption apparatus according to claim 1, wherein the lower layer assembly comprises two lower layer rotary valves (9), six feed pipes (7) being connected to the two lower layer rotary valves (9) via first feed pipes (10), one side of the two lower layer rotary valves (9) being connected to an inlet pipe (11), and the other side of the two lower layer rotary valves (9) being connected to a reverse discharge pipe (12).
3. A pressure swing adsorption apparatus according to claim 2 wherein the upper layer assembly comprises two upper layer rotary valves (13), six discharge pipes (8) are connected to the two upper layer rotary valves (13) by means of second delivery pipes (14), one side of the two upper layer rotary valves (13) is connected to an output pipe (15), and the other side of the two upper layer rotary valves (13) is connected to a discharge pipe (16) and a flushing pipe (17), and a final filling pipe (18) is also connected between the upper layer rotary valves (13) and the output pipe (15).
4. A pressure swing adsorption apparatus according to claim 3 wherein the lower rotary valve (9) and the upper rotary valve (13) each comprise a valve body (19), a valve sleeve (20) is sleeved outside the valve body (19), and a first flow channel (21), a second flow channel (22), a third flow channel (23), a fourth flow channel (24), a fifth flow channel (25), a sixth flow channel (26), a seventh flow channel (27) and an eighth flow channel (28) are provided in the valve body (19).
5. The pressure swing adsorption apparatus according to claim 4, wherein ports of the first flow path (21), the second flow path (22), the third flow path (23), the fourth flow path (24), the fifth flow path (25), the sixth flow path (26), the seventh flow path (27), and the eighth flow path (28) are all open on an outer surface of the valve body (19).
6. A pressure swing adsorption apparatus according to claim 4 wherein the valve body (19) is in rotary connection with the valve housing (20).
7. A pressure swing adsorption apparatus according to claim 4 wherein said valve housing (20) of said lower rotary valve (9) is provided with a plurality of first through holes, said first through holes being connected to said first delivery tube (10), said inlet tube (11) and said reverse discharge tube (12), respectively.
8. A pressure swing adsorption apparatus according to claim 4 wherein said valve housing (20) of said upper rotary valve (13) is provided with a plurality of second through holes, said second through holes being connected to said second delivery tube (14), said delivery tube (15), said delivery tube (16), said flushing tube (17) and said final fill tube (18), respectively.
9. A pressure swing adsorption apparatus according to claim 4, wherein the valve body (19) is of cylindrical configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311292205.7A CN117101341A (en) | 2023-10-08 | 2023-10-08 | Pressure swing adsorption device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311292205.7A CN117101341A (en) | 2023-10-08 | 2023-10-08 | Pressure swing adsorption device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117101341A true CN117101341A (en) | 2023-11-24 |
Family
ID=88800299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311292205.7A Pending CN117101341A (en) | 2023-10-08 | 2023-10-08 | Pressure swing adsorption device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117101341A (en) |
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2023
- 2023-10-08 CN CN202311292205.7A patent/CN117101341A/en active Pending
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