CN220376361U - Hydrogen recovery system for safe absorption and purification utilization - Google Patents
Hydrogen recovery system for safe absorption and purification utilization Download PDFInfo
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- CN220376361U CN220376361U CN202322109084.XU CN202322109084U CN220376361U CN 220376361 U CN220376361 U CN 220376361U CN 202322109084 U CN202322109084 U CN 202322109084U CN 220376361 U CN220376361 U CN 220376361U
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- absorption
- recovery system
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 91
- 239000001257 hydrogen Substances 0.000 title claims abstract description 33
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 33
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000011084 recovery Methods 0.000 title claims abstract description 20
- 238000000746 purification Methods 0.000 title claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000007789 gas Substances 0.000 claims abstract description 44
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 239000001301 oxygen Substances 0.000 claims abstract description 25
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 25
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000007921 spray Substances 0.000 claims description 17
- 230000001502 supplementing effect Effects 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 4
- 238000001223 reverse osmosis Methods 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims 1
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 12
- 239000002253 acid Substances 0.000 abstract description 12
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 abstract description 11
- 229910000041 hydrogen chloride Inorganic materials 0.000 abstract description 11
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 5
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 238000010992 reflux Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Abstract
The utility model relates to a hydrogen recovery system for safe absorption and purification utilization, which solves the problems that the tail gas generated by the reaction of the existing aluminum sol device cannot be well recovered to cause environmental pollution and simultaneously cause resource waste. The method comprises an aluminum sol reaction unit, a nitrogen replacement unit, a buffer unit, a tail gas impurity absorption unit, a nitrogen pressurization system and a gas separation unit, wherein mixed gas is buffered and stored through the buffer unit, then enters a primary absorption tower for preliminary absorption, then flows into a secondary absorption tower for further absorption, acid liquor formed by absorption and condensation is discharged through a liquid outlet, the oxygen content monitored by an oxygen-containing analyzer is unqualified, the nitrogen pressurization system is used for introducing nitrogen into the secondary absorption tower, and meanwhile, the gas is refluxed into a buffer tank until the oxygen content monitored by the oxygen-containing analyzer is qualified, and reflux is stopped; and if the monitoring oxygen content is qualified, introducing the mixed gas into a gas separation unit for separation, so that safe recycling of hydrogen is realized, and meanwhile, hydrogen chloride is absorbed and recycled to prevent environmental pollution.
Description
Technical Field
The utility model relates to a hydrogen recovery system for safe absorption and purification utilization.
Background
The current aluminum sol device is mainly prepared by carrying out chemical reaction on diluted hydrochloric acid and aluminum sheets (or aluminum blocks), and hydrogen gas which is a byproduct of the current reaction is directly discharged to the atmosphere after being simply treated along with water vapor, hydrogen chloride and the like due to factors such as instability of the reaction, influence of impurities, difficulty in controlling reaction heat release and the like. Because the treatment flow is simple, impurities such as hydrogen chloride and the like are not thoroughly absorbed, the environment is polluted, meanwhile, the direct discharge of hydrogen also causes the waste of energy, the development of the current device or similar hydrogen production process and the environmental protection requirement are met, and a hydrogen recovery system for safe absorption and purification utilization is researched and developed.
Disclosure of Invention
The utility model aims to solve the problems that the tail gas generated by the reaction of the existing aluminum sol device cannot be well recovered to cause environmental pollution and simultaneously cause resource waste.
The technical scheme adopted for solving the technical problems is as follows: the hydrogen recovery system for safe absorption and purification utilization comprises an aluminum sol reaction unit, a nitrogen replacement unit for removing oxygen in the reaction unit before reaction, a buffer unit, a tail gas impurity absorption unit, a nitrogen pressurization system and a gas separation unit, wherein the buffer unit comprises a buffer tank connected with an air outlet of the reaction unit, the tail gas impurity absorption unit comprises a first-stage absorption tower connected with the buffer tank and a second-stage absorption tower connected with the first-stage absorption tower, a first spray head is arranged at the inner top of the first-stage absorption tower and connected with a first desalted water pipe, a liquid outlet is arranged at the bottom of the second-stage absorption tower, a second spray head is arranged at the inner top of the second-stage absorption tower, an oxygen-containing analyzer connected with the second-stage absorption tower is arranged at the top of the second-stage absorption tower, and the nitrogen pressurization system is connected with the second-stage absorption tower, and the top of the second-stage absorption tower is respectively connected with the buffer unit and the gas separation unit.
The technical scheme for further limiting the utility model comprises the following steps:
the second spray head is connected with a second desalted water pipe.
The bottom of the secondary absorption tower is provided with a PH analyzer, a tower bottom circulating pump is arranged between the liquid outlet and the secondary absorption tower, the tower bottom circulating pump is connected with a circulating condenser, one end of the circulating condenser is connected with a second spray head, and the other end of the circulating condenser is connected with a second desalted water pipe.
The buffer unit also comprises a first pressure gauge detector and a safety valve device which are arranged in the buffer tank.
The nitrogen pressurization system comprises a second pressure gauge detector and an automatic nitrogen supplementing valve group.
The nitrogen pressurization system also comprises a hydrogen pressurization compressor.
The gas separation unit comprises a drying unit and a reverse osmosis membrane separation unit connected with the drying unit.
Through the technical scheme, the utility model has the beneficial effects that: when the hydrogen recovery system for safe absorption and purification utilization is used for recovery, mixed gas generated by an aluminum sol reaction unit is buffered and stored by a buffer unit, the mixed gas in a buffer tank is fed into a first-stage absorption tower for preliminary absorption, the mixed gas and acid liquor flowing out of the first-stage absorption tower flow into a second-stage absorption tower for further absorption, the acid liquor formed by absorption and condensation is discharged through a liquid outlet, an oxygen-containing analyzer at the top of the second-stage absorption tower monitors the oxygen content of the mixed gas, if the monitored oxygen content is unqualified, a nitrogen pressurization system feeds nitrogen into the second-stage absorption tower, and meanwhile, the mixed gas in the second-stage absorption tower is refluxed into the buffer tank until the monitored oxygen content is qualified, and reflux is stopped; and if the monitoring oxygen content is qualified, introducing the mixed gas into a gas separation unit for separation, thereby separating out hydrogen, realizing safe recycling of the hydrogen, and simultaneously absorbing and recycling the hydrogen chloride to prevent environmental pollution.
Drawings
FIG. 1 is a schematic diagram of a hydrogen recovery system for safe absorption and purification according to the present utility model.
Detailed Description
The structure of the present utility model will be further described with reference to the accompanying drawings.
Referring to fig. 1, a hydrogen recovery system for safe absorption and purification and utilization comprises an alumina sol reaction unit 1, a nitrogen replacement unit 2 for removing oxygen in the reaction unit before reaction, a buffer unit 3, a tail gas impurity absorption unit 4, a nitrogen pressurization system 5 and a gas separation unit 6, wherein the buffer unit 3 comprises a buffer tank 31 connected with an air outlet of the reaction unit, the tail gas impurity absorption unit 4 comprises a primary absorption tower 41 connected with the buffer tank and a secondary absorption tower 42 connected with the primary absorption tower, a first spray nozzle 411 is arranged at the inner top of the primary absorption tower, the first spray nozzle is connected with a first desalting water pipe 412, a liquid outlet 421 is arranged at the bottom of the secondary absorption tower 42, a second spray nozzle 422 is arranged at the inner top of the secondary absorption tower, an oxygen analyzer 423 nitrogen pressurization system 5 connected with the secondary absorption tower 42 is arranged at the top of the secondary absorption tower, and the top of the secondary absorption tower is respectively connected with the buffer unit and the gas separation unit.
In this embodiment, the second sprayer is in tubular connection 422 with a second desalted water 424. The second desalted water is sprayed out through a second spray nozzle to form spray so as to absorb the water vapor and the hydrogen chloride gas in the secondary absorption tower again.
In this embodiment, a PH analyzer 425 is disposed at the bottom of the secondary absorption tower 42, a bottom circulation pump 7 is disposed between the liquid outlet and the secondary absorption tower, the bottom circulation pump is connected with a circulation condenser 8, one end of the circulation condenser is connected with the second nozzle, and the other end is connected with the second desalted water pipe. The PH analyzer 425 is configured to analyze the concentration of the acid solution at the bottom of the secondary absorption tower, if the concentration is too low, close the liquid outlet, open the circulating condenser, pump the acid solution at the bottom of the secondary absorption tower to the circulating condenser through the circulating pump at the bottom of the tower, and simultaneously introduce desalted water into the circulating condenser through the second desalted water pipe, and after the diluted acid solution enters the circulating condenser to cool, thoroughly absorb the hydrogen chloride and the water vapor in the secondary absorption tower through the spraying of the second spray nozzle, and then open the liquid outlet to drain.
In this embodiment, the buffer unit further includes a first pressure gauge detector and a safety valve device disposed in the buffer tank. The first pressure gauge detector is used for detecting the pressure in the buffer tank, and the safety valve device is mainly used for safety of the system and preventing overpressure.
In this embodiment, the nitrogen pressurization system includes a second manometer detector and an automatic nitrogen supplementing valve set. When the oxygen-containing analyzer detects that the oxygen-containing concentration in the secondary absorption tower exceeds the standard, the automatic nitrogen supplementing valve group is used for supplementing nitrogen into the secondary absorption tower, and in addition, when the second pressure gauge detector detects that the pressure in the system is lower than a certain value, the pressure in the system can be increased by supplementing the nitrogen, so that negative pressure in the system is prevented.
In this embodiment, the nitrogen pressurization system further includes a hydrogen pressurization compressor. When the second pressure gauge detector detects that the pressure in the system is lower than a certain value, the pressure in the system can be increased through the hydrogen pressurizing compressor under the condition of not supplementing nitrogen.
In this embodiment, the gas separation unit includes a drying unit, and a reverse osmosis membrane separation unit connected to the drying unit. The collected gas is firstly dried, and then separated, recovered and reused by a reverse osmosis membrane separation unit.
The hydrogen recovery method for safe absorption and purification by using the hydrogen recovery system for safe absorption and purification by using any one of the above steps comprises the following steps:
step A: before the reaction of the aluminum sol reaction unit, introducing nitrogen into the system through a nitrogen replacement unit, and discharging oxygen in the system; the oxygen generated by the reaction unit is prevented from reacting with hydrogen to explode.
And (B) step (B): introducing mixed gas hydrogen chloride, hydrogen and water vapor generated by the reaction of the aluminum sol reaction unit into a buffer tank for buffer storage; in this embodiment, the buffer unit further includes a first pressure gauge detector and a safety valve device disposed in the buffer tank. The first pressure gauge detector is used for detecting the pressure in the buffer tank, and the safety valve device is mainly used for safety of the system and preventing overpressure.
Step C: the mixed gas in the buffer tank enters the first-stage absorption tower again, the first spray nozzle sprays desalted water, the mixed gas is cooled, and hydrogen chloride and water vapor in the mixed gas are primarily absorbed;
step D: the mixed gas and the acid liquor flowing out of the first-stage absorption tower flow into the second-stage absorption tower, the second nozzle sprays desalted water, the mixed gas is further cooled, hydrogen chloride and water vapor in the mixed gas are further absorbed, the acid liquor formed by absorption and condensation is discharged through a liquid outlet, an oxygen-containing analyzer at the top of the second-stage absorption tower monitors the oxygen content of the mixed gas, if the monitored oxygen content is unqualified, a nitrogen pressurization system is used for introducing nitrogen into the second-stage absorption tower, and meanwhile, the mixed gas in the second-stage absorption tower is refluxed into a buffer tank until the monitored oxygen content is qualified, and reflux is stopped; and if the monitored oxygen content is qualified, introducing the mixed gas into a gas separation unit for separation. Thereby realizing safe recycling of hydrogen and simultaneously absorbing and recycling the hydrogen chloride to prevent environmental pollution.
In this embodiment, in step D, the PH analyzer may be disposed at the bottom of the secondary absorption tower to monitor the PH value of the acid solution, a bottom circulation pump is disposed between the liquid outlet and the secondary absorption tower, the bottom circulation pump is connected with the circulation condenser, one end of the circulation condenser is connected with the second nozzle, the other end of the circulation condenser is connected with the second desalted water pipe, the liquid outlet is closed, the bottom circulation pump sends the acid solution into the circulation condenser, meanwhile, the second desalted water pipe introduces desalted water into the circulation condenser, after the diluted acid solution enters the circulation condenser to be cooled, the diluted acid solution is sprayed out through the second nozzle to thoroughly circulate the hydrogen chloride and the water vapor in the secondary absorption tower, and then the liquid outlet is opened to drain.
In the embodiment, in step D, the nitrogen pressurization system further includes a hydrogen pressurization compressor, and when the pressure in the system is lower than a certain value, the hydrogen pressurization compressor is turned on to increase the pressure in the system, so as to prevent negative pressure in the system.
Although specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, the utility model should not be construed as limited to the scope of protection of the utility model. Various modifications and variations which may be made by those skilled in the art without the creative effort fall within the protection scope of the present utility model within the scope described in the claims.
Claims (7)
1. The utility model provides a hydrogen recovery system of safe absorption and purification utilization, includes aluminium sol reaction unit and is used for the nitrogen gas replacement unit that clears away the oxygen in the reaction unit before the reaction, its characterized in that: the hydrogen recovery system also comprises a buffer unit, a tail gas impurity absorption unit, a nitrogen pressurization system and a gas separation unit, wherein the buffer unit comprises a buffer tank connected with a gas outlet of the reaction unit, the tail gas impurity absorption unit comprises a first-stage absorption tower connected with the buffer tank and a second-stage absorption tower connected with the first-stage absorption tower, a first spray head is arranged at the inner top of the first-stage absorption tower and is connected with a first desalted water pipe, a liquid outlet is arranged at the bottom of the second-stage absorption tower, a second spray head is arranged at the inner top of the second-stage absorption tower, an oxygen-containing analyzer connected with the second-stage absorption tower is arranged at the top of the second-stage absorption tower, and the nitrogen pressurization system is connected with the second-stage absorption tower, and the top of the second-stage absorption tower is respectively connected with the buffer unit and the gas separation unit.
2. A hydrogen recovery system for safe absorption and purification as recited in claim 1, wherein: the second spray head is connected with a second desalted water pipe.
3. A hydrogen recovery system for safe absorption and purification utilization as defined in claim 2, wherein: the bottom of the secondary absorption tower is provided with a PH analyzer, a tower bottom circulating pump is arranged between the liquid outlet and the secondary absorption tower, the tower bottom circulating pump is connected with a circulating condenser, one end of the circulating condenser is connected with a second spray head, and the other end of the circulating condenser is connected with a second desalted water pipe.
4. A hydrogen recovery system for safe absorption and purification as recited in claim 1, wherein: the buffer unit also comprises a first pressure gauge detector and a safety valve device which are arranged in the buffer tank.
5. A hydrogen recovery system for safe absorption and purification as recited in claim 1, wherein: the nitrogen pressurization system comprises a second pressure gauge detector and an automatic nitrogen supplementing valve group.
6. A hydrogen recovery system for safe absorption and purification as recited in claim 5, wherein: the nitrogen pressurization system also comprises a hydrogen pressurization compressor.
7. A hydrogen recovery system for safe absorption and purification as recited in claim 1, wherein: the gas separation unit comprises a drying unit and a reverse osmosis membrane separation unit connected with the drying unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322109084.XU CN220376361U (en) | 2023-08-07 | 2023-08-07 | Hydrogen recovery system for safe absorption and purification utilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322109084.XU CN220376361U (en) | 2023-08-07 | 2023-08-07 | Hydrogen recovery system for safe absorption and purification utilization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220376361U true CN220376361U (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322109084.XU Active CN220376361U (en) | 2023-08-07 | 2023-08-07 | Hydrogen recovery system for safe absorption and purification utilization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220376361U (en) |
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2023
- 2023-08-07 CN CN202322109084.XU patent/CN220376361U/en active Active
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