CN220520647U - Alkaline electrolyzed water hydrogen production system with oxygen separator protection function - Google Patents
Alkaline electrolyzed water hydrogen production system with oxygen separator protection function Download PDFInfo
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- CN220520647U CN220520647U CN202322203966.2U CN202322203966U CN220520647U CN 220520647 U CN220520647 U CN 220520647U CN 202322203966 U CN202322203966 U CN 202322203966U CN 220520647 U CN220520647 U CN 220520647U
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- Prior art keywords
- oxygen separator
- production system
- oxygen
- hydrogen production
- separator
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- 239000001301 oxygen Substances 0.000 title claims abstract description 131
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 131
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 127
- 239000001257 hydrogen Substances 0.000 title claims abstract description 116
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 116
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000007789 gas Substances 0.000 claims abstract description 125
- 239000012535 impurity Substances 0.000 claims abstract description 30
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 13
- 239000007791 liquid phase Substances 0.000 claims abstract description 11
- 239000012071 phase Substances 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 32
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 5
- 238000005868 electrolysis reaction Methods 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 13
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000004880 explosion Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000011261 inert gas Substances 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 238000000195 production control method Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The alkaline electrolyzed water hydrogen production system with the oxygen separator protection function comprises a galvanic pile, a circulating pump, a hydrogen separator, an oxygen separator and a protection gas flow path. The hydrogen separator and the oxygen separator are connected to the stack via the circulation pump and form a circulation flow path. The oxygen separator comprises a gas phase part and a liquid phase part, and is provided with a shielding gas inlet. The shielding gas flow path is connected to the shielding gas inlet and is used for introducing shielding gas into the oxygen separator when the hydrogen production system is in a low-load working mode so as to reduce the hydrogen impurity ratio in the oxygen separator.
Description
Technical Field
The application relates to the technical field of electrolytic hydrogen production, and in particular relates to an alkaline electrolytic water hydrogen production system with an oxygen separator protection function.
Background
Renewable energy sources are combined with water electrolysis hydrogen production technology, which is an important development direction of future energy sources, wherein the alkaline water electrolysis hydrogen production technology is the most mature large-scale water electrolysis hydrogen production technology in the prior art, and has great development space in the utilization field of renewable wave energy sources. The technology of producing hydrogen by alkaline water electrolysis can directly convert electric energy generated by renewable energy sources such as fluctuating photovoltaic, wind power, abundant hydropower, wave energy, tidal energy and the like into chemical energy in hydrogen.
However, the performance of alkaline electrolyzed water hydrogen systems is limited by the content of "hydrogen in oxygen" impurities (HTO) in their oxygen separators. When an alkaline water electrolysis hydrogen production system is operated under low load, the content of hydrogen impurities in oxygen can exceed a safety value of 4% (the industrial requirement is usually 2%), and the risk of explosion is generated. In order to solve the problem that the flexible operation range of the alkaline water electrolysis hydrogen production system is smaller due to the fact that the impurity concentration of hydrogen in oxygen of the oxygen separator is increased under the low-load state of the alkaline water electrolysis hydrogen production system, the design scheme is needed to reduce the impurity content of hydrogen in the oxygen separator.
CN113005470a discloses a hydrogen production control method and device, electronic equipment and storage medium. The hydrogen production control method comprises the following steps: the control current is determined from the grid power. And determining the hydrogen-oxygen ratio of the oxygen production side of the electrolytic cell according to the input molar flow of the hydrogen and the output molar flow of the oxygen production side of the electrolytic cell. Based on the control current, the hydrogen to oxygen ratio, and the detected first pressure of the separator, an output molar flow of hydrogen produced by the electrolyzer is determined. The hydrogen production control method can control the output molar flow of the electrolyte for preparing hydrogen in real time based on the hydrogen-oxygen ratio so as to control the hydrogen-oxygen ratio to be far away from the explosion point.
The method of controlling the hydrogen-oxygen ratio away from the explosion point in the patent application requires adjusting the pressure of the hydrogen produced by the system, and can influence the operation of the subsequent hydrogen treatment system.
Disclosure of Invention
The present application has been made in view of the state of the art described above. The purpose of the application is to provide an alkaline electrolyzed water hydrogen production system with an oxygen separator protection function, which reduces the impurity ratio of hydrogen in oxygen in the oxygen separator by introducing protection gas into the oxygen separator.
The application provides an alkaline electrolyzed water hydrogen production system with an oxygen separator protection function, which comprises a galvanic pile, a circulating pump, a hydrogen separator, an oxygen separator and a protection gas flow path,
the hydrogen separator and the oxygen separator are connected to the stack via the circulation pump and form a circulation flow path,
the oxygen separator comprises a gas phase part and a liquid phase part, the oxygen separator is provided with a protective gas inlet,
the shielding gas flow path is connected to the shielding gas inlet and is used for introducing shielding gas into the oxygen separator when the hydrogen production system is in a low-load working mode so as to reduce the hydrogen impurity ratio in the oxygen separator.
In at least one possible embodiment, the shielding gas inlet is provided in a gas phase portion of the oxygen separator.
In at least one possible embodiment, the shielding gas inlet is provided in the liquid phase portion of the oxygen separator.
In at least one possible embodiment, the hydrogen production system further comprises a high pressure gas cylinder containing the shielding gas, the high pressure gas cylinder being connected to the shielding gas flow path to feed the shielding gas to the oxygen separator.
In at least one possible embodiment, the hydrogen production system further comprises an air separator capable of separating nitrogen in air and passing the nitrogen into the oxygen separator via the shielding gas flow path.
In at least one possible embodiment, the hydrogen production system further comprises an air compressor and a impurity removal device, so as to compress air and remove carbon dioxide impurities in the air, and then the compressed and impurity-removed air is introduced into the oxygen separator through the shielding gas flow path.
In at least one possible embodiment, the hydrogen production system further comprises a gas impurity removal device and a gas pressurization device, wherein the gas discharged from the oxygen separator is introduced into the oxygen separator through the shielding gas flow path after impurity removal and pressurization treatment by the gas impurity removal device and the gas pressurization device.
In at least one possible embodiment, the low load mode of operation of the hydrogen production system has a yield of less than 10% of its rated yield,
the flow rate of the shielding gas is 5% to 15% of the rated oxygen production of the hydrogen production system.
In at least one possible embodiment, the shielding gas flow path includes a shielding gas shut-off valve to regulate opening and closing of the shielding gas flow path.
In at least one possible embodiment, the shielding gas is nitrogen or a mixture of nitrogen and oxygen.
According to the alkaline electrolyzed water hydrogen production system with the oxygen separator protection function, the protection gas is introduced into the oxygen separator, so that the impurity ratio of hydrogen in oxygen in the oxygen separator is reduced, the explosion risk is reduced, and the flexible operation range of the hydrogen production system can be further improved.
Drawings
FIG. 1 is a schematic diagram of an alkaline water electrolysis hydrogen production system according to a first embodiment of the present application.
Fig. 2 is a schematic diagram of an alkaline water electrolysis hydrogen production system according to a second embodiment of the present application.
Fig. 3 is a schematic diagram of an alkaline water electrolysis hydrogen production system according to a third embodiment of the present application.
Fig. 4 is a schematic diagram of an alkaline water electrolysis hydrogen production system according to a fourth embodiment of the present application.
Fig. 5 is a schematic diagram of an alkaline water electrolysis hydrogen production system according to a fifth embodiment of the present application.
100. Electric pile
200. Circulation pump
300. Hydrogen separator
400. Oxygen separator
11. Hydrogen stop valve
12. Hydrogen regulating valve
21. Oxygen stop valve
22. Oxygen regulating valve
31. Protective gas stop valve
Detailed Description
Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are merely illustrative of how one skilled in the art may practice the present application and are not intended to be exhaustive of all of the possible ways of practicing the present application nor to limit the scope of the present application.
Embodiments of the present application provide an alkaline electrolyzed water hydrogen production system (hereinafter, sometimes simply referred to as "hydrogen production system") having an oxygen separator protection function.
As shown in fig. 1 to 5, the hydrogen production system may include a stack 100, a circulation pump 200, a hydrogen separator 300, an oxygen separator 400, and a shielding gas flow path. Specifically, the stack 100 may utilize electrical energy to split water into hydrogen and oxygen. It will be appreciated that the water may contain alkaline substances such as sodium hydroxide, potassium hydroxide, etc. to form an alkaline solution. The hydrogen and oxygen generated by the stack 100 may enter the hydrogen separator 300 and the oxygen separator 400 from the hydrogen flow path and the oxygen flow path, respectively. The hydrogen separator 300 and the oxygen separator 400 may separate hydrogen, oxygen, and lye, respectively. The separated alkali liquor can be pumped into the pile 100 again under the action of gravity and the circulating pump 200 to form an alkali liquor circulating flow path for circulating electrolysis operation. It will be appreciated that the hydrogen separator 300 and the oxygen separator 400 may include an upper gas phase portion and a lower liquid phase portion within the interior due to the presence of a portion of the lye.
Further, the hydrogen gas may pass through the hydrogen regulating valve 12, the hydrogen shut-off valve 11 to enter the equipment of the next process, such as a hydrogen purification equipment, a hydrogen storage equipment, etc. The oxygen may be discharged through the oxygen regulating valve 22, the oxygen shut-off valve 21 or enter the equipment of the next process, such as an oxygen purification equipment, an oxygen storage equipment, etc.
The oxygen separator 400 of the hydrogen production system of the present application is provided with a shielding gas inlet, which may be connected to the shielding gas flow path. The oxygen separator 400 may be purged of shielding gas via a shielding gas flow path. Illustratively, the shielding gas may be an inert gas (e.g., nitrogen) or a mixed gas of an inert gas and oxygen, etc., as the shielding gas to purge the oxygen separator 400. The hydrogen impurity in the oxygen separator 400 may be purged or reduced by the shielding gas purge. And the operating range of the alkaline water electrolysis hydrogen production system is safely and reliably enlarged. Meanwhile, the hydrogen production system can better meet the requirements of conversion and utilization of wave-type renewable energy sources such as wind energy, tidal energy and the like. It will be appreciated that the shielding gas-containing gas exiting the oxygen separator 400 may be directly vented or recycled.
It is appreciated that the hydrogen production system of the present embodiment may include both high load and low load modes of operation. When the alkaline electrolyzed water hydrogen production system is operated in the high load mode, the oxygen production amount is large enough, and at the moment, the oxygen separator 400 discharges enough gas through the oxygen regulating valve 22, so that the lower hydrogen impurity content ratio in the oxygen separator 400 can be maintained even if the protective gas is not introduced. Thus, when the hydrogen production system is operating in the high load mode of operation, shielding gas may not be vented.
When the hydrogen production system is in the low-load working mode, the oxygen production amount is relatively insufficient, and at the moment, the oxygen discharged by the oxygen separator 400 through the oxygen regulating valve 22 is reduced, so that impurities such as hydrogen in the oxygen separator 400 can be accumulated, and the hydrogen impurity content ratio in the lower oxygen in the oxygen separator 400 can not be maintained sufficiently. At this time, the shielding gas shutoff valve 31 may be opened, and shielding gas may be introduced into the oxygen separator 400 to reduce the hydrogen impurity ratio in the oxygen separator 400.
Preferably, the shielding gas selected for the hydrogen production system may include various types of inert gases (such as nitrogen), as well as mixtures of inert gases with oxygen, or other gases that are difficult to dissolve in the lye and do not chemically react with the materials in the lye. The shielding gas can be from various sources, such as air after impurity removal, gas in a gas cylinder, gas in matched industrial production, and the like.
It can be appreciated that the protection gas is introduced into the oxygen separator to avoid or reduce the risk of explosion caused by excessive hydrogen impurities, so that the hydrogen production system can safely operate under lower load, and the flexible operation range of the hydrogen production system is further increased.
In the following, five possible specific embodiments are specifically given.
First embodiment
As shown in fig. 1, the shielding gas may be passed through a shielding gas shut-off valve 31 into the gas phase portion of the oxygen separator 400. The liquid level fluctuation caused by the shielding gas inlet mode is small.
Second embodiment
As shown in fig. 2, the shielding gas may be introduced into the liquid phase portion of the oxygen separator 400 through the shielding gas shut-off valve 31. The solution of introducing the shielding gas into the liquid phase requires overcoming the effect of the water pressure, but at the same time can remove or reduce the microbubbles in the liquid phase (lye). It will be appreciated that when the shielding gas is introduced into the oxygen separator 400, and particularly when the shielding gas is introduced from the bottom of the oxygen separator to the inside thereof, the bubbles of the shielding gas can absorb the microbubbles in the liquid phase while overcoming the rise of the water pressure.
Third embodiment
As shown in fig. 3, a high-pressure gas cylinder may be connected to the shielding gas flow path, and the high-pressure gas cylinder may be used as a source of shielding gas. For example, compressed nitrogen may be stored in a high pressure gas cylinder.
Fourth embodiment
As shown in fig. 4, the shielding gas may be directly processed with air and then introduced into the oxygen separator.
Three exemplary ways of using air as a shielding gas are shown in total in fig. 4:
1. the air is processed (e.g., carbon dioxide is removed, nitrogen is separated, compressed air is separated, etc.) by using equipment on existing production lines such as an air separator, a gas cylinder, an air compressor, etc. in the subsequent process, and then is introduced into the oxygen separator 400. For example, nitrogen separated from the ammonia synthesis process may be introduced into the oxygen separator 400 via a guard gas flow path using an existing air separator. The scheme can integrate and utilize the existing equipment in the production line, and save equipment cost.
2. The hydrogen production system may be additionally provided with an air separator, and the nitrogen in the air is separated and then introduced into the oxygen separator 400 through a shielding gas flow path.
3. The hydrogen production system may be additionally provided with an air compressor and a impurity removing device, wherein after the air is compressed, the compressed air with main components of nitrogen and oxygen is introduced into the oxygen separator 400 through a shielding gas flow path after the carbon dioxide in the air is removed.
Fifth embodiment
As shown in fig. 5, the hydrogen production system may be additionally provided with a gas impurity removal and gas pressurization device, and a part of the gas discharged from the oxygen separator 400 may be subjected to impurity removal (for example, a small amount of hydrogen, carbon dioxide, etc. is removed therefrom) and pressurized, and then introduced into the oxygen separator 400 again through a shielding gas flow path. The scheme can reduce the consumption of the protective gas by circulating the protective gas.
Preferably, a shielding gas regulating valve can be further arranged in the shielding gas flow path to regulate and control the air inflow, the flow rate and the like of the shielding gas. An air pump or the like may be provided in the shielding gas flow path for pumping the shielding gas into the oxygen separator 400.
Preferably, the low load production of the hydrogen production system when operating in the low load mode may be less than 10% of the nominal production.
Preferably, the flow rate of the shielding gas purge may be 5% to 15% of the nominal oxygen production of the hydrogen production system.
It will be appreciated that appropriate combinations may be made between the different embodiments of the present embodiment. For example: the hydrogen production systems of the third, fourth, and fifth embodiments of the present application may also take the form of the second embodiment in which the shielding gas is introduced into the liquid phase portion of the oxygen separator 400. The hydrogen production systems of the first, second, third, and fourth embodiments may be combined with the scheme of recycling the oxygen separator exhaust gas of the fifth embodiment.
Some of the advantageous effects of the above-described embodiments of the present application are briefly described below.
(1) According to the alkaline electrolyzed water hydrogen production system with the oxygen separator protection function, the content of hydrogen impurities (HTO) in oxygen in the oxygen separator can be reduced by introducing the protection gas such as nitrogen into the oxygen separator. Thereby avoiding the risk of explosion of the oxygen separator during operation, especially during low load operation. Meanwhile, the protective gas flow path of the hydrogen production system can be flexibly arranged, various devices can be configured or the existing devices of the production line can be utilized for combination according to specific production process requirements, and the hydrogen production system is suitable for being applied to industrial production practice.
(2) The alkaline water electrolysis hydrogen production system with the oxygen separator protection function has the advantages that the influence on the main flow process of water electrolysis hydrogen production is small when the protection airflow path is operated, and the pressure and the like in the main flow process operation are not required to be changed. And further, the problem of mechanical stress fatigue of equipment caused by pressure change of the system can be avoided or reduced.
It is to be understood that in the present application, when the number of parts or members is not particularly limited, the number may be one or more, and the number herein refers to two or more. For the case where the number of parts or members is shown in the drawings and/or described in the specification as a specific number such as two, three, four, etc., the specific number is generally illustrative and not restrictive, it may be understood that a plurality, i.e., two or more, but this does not mean that the present application excludes one.
It should be understood that the above embodiments are merely exemplary and are not intended to limit the present application. Those skilled in the art can make various modifications and changes to the above-described embodiments without departing from the scope of the present application.
Claims (10)
1. An alkaline electrolyzed water hydrogen production system with an oxygen separator protection function is characterized by comprising a galvanic pile, a circulating pump, a hydrogen separator, an oxygen separator and a protection gas flow path,
the hydrogen separator and the oxygen separator are connected to the stack via the circulation pump and form a circulation flow path,
the oxygen separator comprises a gas phase part and a liquid phase part, the oxygen separator is provided with a protective gas inlet,
the shielding gas flow path is connected to the shielding gas inlet and is used for introducing shielding gas into the oxygen separator when the hydrogen production system is in a low-load working mode so as to reduce the hydrogen impurity ratio in the oxygen separator.
2. The alkaline electrolyzed water hydrogen production system having an oxygen separator protection function according to claim 1, wherein the shielding gas inlet is provided in a gas phase portion of the oxygen separator.
3. The alkaline electrolyzed water hydrogen production system having an oxygen separator protection function according to claim 1, wherein the protection gas inlet is provided in a liquid phase portion of the oxygen separator.
4. The alkaline electrolyzed water hydrogen production system having an oxygen separator protection function according to claim 1, further comprising a high pressure gas bottle containing the shielding gas, the high pressure gas bottle being connected to the shielding gas flow path to introduce the shielding gas into the oxygen separator.
5. The alkaline electrolyzed water hydrogen production system having an oxygen separator protection function according to claim 1, further comprising an air separator capable of separating nitrogen in air and passing the nitrogen into the oxygen separator via the shielding gas flow path.
6. The alkaline electrolyzed water hydrogen production system with oxygen separator protection function according to claim 1, further comprising an air compressor and an impurity removal device for compressing air and removing carbon dioxide impurities therein, and introducing the compressed and purified air into the oxygen separator via the shielding gas flow path.
7. The alkaline electrolyzed water hydrogen production system with the oxygen separator protection function according to claim 1, further comprising a gas impurity removal device and a gas pressurization device, wherein the gas discharged from the oxygen separator is introduced into the oxygen separator through the protection gas flow path after impurity removal and pressurization treatment by the gas impurity removal device and the gas pressurization device.
8. The alkaline electrolyzed water hydrogen production system with oxygen separator protection as defined in claim 1 wherein the low load mode of operation of the hydrogen production system has a production of less than 10% of its rated production,
the flow rate of the shielding gas is 5% to 15% of the rated oxygen production of the hydrogen production system.
9. The alkaline electrolyzed water hydrogen production system having an oxygen separator protection function according to claim 1, wherein the shielding gas flow path comprises a shielding gas shut-off valve to regulate the opening and closing of the shielding gas flow path.
10. The alkaline electrolyzed water hydrogen production system with an oxygen separator protection function according to claim 1, wherein the protection gas is nitrogen or a mixed gas of nitrogen and oxygen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322203966.2U CN220520647U (en) | 2023-08-16 | 2023-08-16 | Alkaline electrolyzed water hydrogen production system with oxygen separator protection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322203966.2U CN220520647U (en) | 2023-08-16 | 2023-08-16 | Alkaline electrolyzed water hydrogen production system with oxygen separator protection function |
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| CN220520647U true CN220520647U (en) | 2024-02-23 |
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