CN218893744U - Differential pressure adjusting device of electrolytic hydrogen production system and electrolytic hydrogen production system - Google Patents
Differential pressure adjusting device of electrolytic hydrogen production system and electrolytic hydrogen production system Download PDFInfo
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- CN218893744U CN218893744U CN202122311265.1U CN202122311265U CN218893744U CN 218893744 U CN218893744 U CN 218893744U CN 202122311265 U CN202122311265 U CN 202122311265U CN 218893744 U CN218893744 U CN 218893744U
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- 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
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Abstract
The utility model provides a pressure differential adjusting device and electrolytic hydrogen production system of electrolytic hydrogen production system, including oxygen side separator, hydrogen side separator and intercommunication the oxygen side separator with the pipeline of hydrogen side separator, be provided with in the pipeline and be used for adjusting the oxygen side separator with the movable part of hydrogen side separator both sides pressure differential, this application utilizes pressure differential as driving force drive movable part in order to adjust the pressure differential of oxyhydrogen both sides, does not need extra energy output, has avoided energy consumption and manpower, has eliminated the potential safety hazard that causes because of having the pressure differential in oxyhydrogen both sides, has the characteristic of real-time regulation oxyhydrogen both sides pressure differential, and the flexibility ratio is high, and pollution-free, carbon-free discharges, provides the safety guarantee for the development of national hydrogen energy industry, also provides support for the realization of national carbon peak carbon neutralization.
Description
Technical Field
The application relates to the technical field of electrolytic hydrogen production, in particular to a differential pressure regulating device of an electrolytic hydrogen production system and the electrolytic hydrogen production system.
Background
The current mainstream industrial water electrolysis hydrogen production equipment is an alkaline water electrolysis tank, and under the direct current, water in the electrolytic tank is decomposed into 1 part of hydrogen and 1/2 part of oxygen at a cathode and an anode respectively. The ideal water electrolysis hydrogen production process is that the electrolytic tank is full of alkali liquor, and the pressure of the hydrogen side and the oxygen side in the electrolytic tank should be equal. However, in the actual water electrolysis production process, the amounts of hydrogen and oxygen generated due to water electrolysis satisfy 2:1, pressure difference exists on two sides of hydrogen and oxygen, and the hydrogen and the oxygen are easy to pass through the membrane to be mixed with each other under the driving of the pressure difference, so that the purity of the gas is reduced, and even serious accidents such as explosion are caused.
Disclosure of Invention
The present application aims to solve, at least to some extent, one of the technical problems in the related art.
To this end, the object of the present application is to propose a pressure difference regulating device for an electrolytic hydrogen production system. The pressure difference is used as a driving force to drive the movable piece to adjust the pressure difference of the two sides of the oxyhydrogen, extra energy output is not needed, energy consumption and manpower are avoided, potential safety hazards caused by the pressure difference of the two sides of the oxyhydrogen are eliminated, the characteristics of adjusting the pressure difference of the two sides of the oxyhydrogen in real time are achieved, the flexibility is high, pollution and carbon emission are avoided, safety guarantee is provided for the development of the national hydrogen energy industry, and support is provided for the realization of the national carbon-to-carbon neutralization.
In order to achieve the above purpose, the pressure difference adjusting device of the electrolytic hydrogen production system provided by the application comprises an oxygen side separator, a hydrogen side separator and a pipeline communicated with the oxygen side separator and the hydrogen side separator, wherein a movable piece for adjusting the pressure difference between two sides of the oxygen side separator and the hydrogen side separator is arranged in the pipeline.
Further, when the movable piece is a piston, the piston is movably arranged in the pipeline.
Further, the device also comprises a controller, wherein a first proximity switch and a second proximity switch are respectively arranged on two sides of the piston in the pipeline, and the first proximity switch and the second proximity switch are respectively electrically connected with the controller.
Further, when the movable piece is a gas film, the gas film is fixedly arranged at a position, close to the oxygen side separator, of 1/3 of the position in the pipeline.
Further, the air film is at least a double-layer film structure.
The pressure difference adjusting device of the electrolytic hydrogen production system comprises an electrolytic tank, and two ends of the electrolytic tank are respectively communicated with the hydrogen side separator and the oxygen side separator through pipelines.
Further, a first return pipeline is further arranged between the hydrogen side separator and the electrolytic tank, and a hydrogen side filter and a hydrogen side cooler are sequentially arranged on the first return pipeline along the liquid flow direction.
Further, a second return pipeline is further arranged between the oxygen side separator and the electrolytic tank, and the oxygen side filter and the oxygen side cooler are sequentially arranged on the second return pipeline along the liquid flow direction.
Further, a hydrogen side pump is also arranged on the first return line between the hydrogen side cooler and the electrolytic tank.
Further, an oxygen side pump is arranged on a second return line between the oxygen side cooler and the electrolytic tank.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic view of a differential pressure regulator of an electrolytic hydrogen production system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an electrolytic hydrogen production system according to another embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the present application include all alternatives, modifications, and equivalents as may be included within the spirit and scope of the appended claims.
Fig. 1 is a schematic structural diagram of a differential pressure regulator of an electrolytic hydrogen production system according to an embodiment of the present application.
Referring to fig. 1, a pressure difference adjusting device of an electrolytic hydrogen production system comprises an oxygen side separator 1, a hydrogen side separator 2 and a pipeline 3 communicating the oxygen side separator 1 and the hydrogen side separator 2, wherein a movable piece 4 for adjusting the pressure difference of two sides of the oxygen side separator 1 and the hydrogen side separator 2 is arranged in the pipeline 3. In this embodiment, the oxygen side separator 1 and the hydrogen side separator 2 are connected by the pipe 3, and pressure difference is generated at both sides of the movable member 4 in the pipe 3 due to different gas production amounts of the oxygen side separator 1 and the hydrogen side separator 2, and the pressure at both sides of the movable member is re-balanced by deformation or movement of the movable member 4 to absorb the pressure. Specifically, the oxygen side separator 1, the hydrogen side separator 2 and the pipe 3 can be integrally formed, so that the sealing performance is good, and the reaction can be fast when the pressure difference is generated. The gas phase parts of the hydrogen side separator 2 and the oxygen side separator 1 are physically separated by the movable part 4, when the pressure difference exists at the two sides of the hydrogen and oxygen, the movable part moves to the low pressure side or deforms under the driving of the pressure difference until the pressure at the two sides of the hydrogen and oxygen is equal.
When the movable member 4 is a piston, the piston is movably disposed in the pipe 3. It will be appreciated that the piston, when mounted in the duct 3, has a good tightness so that it can react quickly to the pressure difference across the piston. When the pressures of the hydrogen side separator 2 and the oxygen side separator 1 are unequal, the piston moves to the low pressure side under the drive of the pressure difference, and the piston stops moving after the pressures of the two sides are equal, so that the adjustment of the pressure difference is completed.
The pressure difference regulating device of the electrolytic hydrogen production system further comprises a controller, wherein a first proximity switch and a second proximity switch are respectively arranged on two sides of the piston in the pipeline 3, and the first proximity switch and the second proximity switch are respectively and electrically connected with the controller. Specifically, the first proximity switch and the second proximity switch are respectively arranged at the left end and the right end of the pipeline, when the piston moves to the left end or the right end of the pipeline, and the first proximity switch or the second proximity switch sends a signal to the controller when the regulation effect is about to be lost, the pressure control condition in the electrolytic hydrogen production system can be informed to staff, the staff can react in time conveniently, and potential safety hazards are avoided. In other embodiments, the device further comprises a pressure release pipeline which is respectively communicated with the oxygen side separator 1 and the hydrogen side separator 2, wherein a valve is arranged on the pressure release pipeline and can be opened and closed through remote control of a controller, so that when the proximity switch senses the piston, the pressure in the electrolytic hydrogen production system is indicated to be larger than the adjusting range of the piston, and the valve is opened at the moment to realize the derivation of the pressure in the electrolytic hydrogen production system.
When the movable piece 4 is a gas film, the gas film is fixedly arranged at a position which is close to 1/3 position of the oxygen side separator 1 in the pipeline 3. Because the gas yield of the oxygen side separator 1 is smaller than that of the hydrogen side separator 2, the gas film is arranged in the pipeline close to the oxygen side separator 1, and part of hydrogen produced by the hydrogen side separator 2 can be stored in the pipeline, so that the pressure difference adjusting capacity of the device is larger. When the pressure difference is generated at the two sides of the air film, the air film deforms and bulges towards the low pressure side under the drive of the pressure difference, so that the pressure at the two sides is restored to be balanced again, and compared with the piston, the piston structure has the advantage that the air tightness is ensured.
The air film is at least of a double-layer film structure. Because the air film is made of high-deformation materials, the double-layer film can be more safe, and accidental rupture of the air film is avoided.
As shown in fig. 2, the electrolytic hydrogen production system comprises the pressure difference adjusting device of the electrolytic hydrogen production system, and further comprises an electrolytic tank 5, wherein two ends of the electrolytic tank 5 are respectively communicated with the hydrogen side separator 2 and the oxygen side separator 1 through pipelines. The electrolytic tank 5 is filled with an electrolyte and electrolyzed, and the produced hydrogen and oxygen flow to the hydrogen side separator 2 and the oxygen side separator 1 respectively to perform gas-liquid separation of the oxygen and the hydrogen.
A first return line 6 is further provided between the hydrogen side separator 2 and the electrolytic tank 5, and a hydrogen side filter 7 and a hydrogen side cooler 8 are sequentially provided on the first return line 6 along the liquid flow direction. The electrolyte separated in the hydrogen side separator 2 is refluxed into the electrolytic tank 5 through the first reflux pipeline 6, and sequentially passes through the filtration and cooling of the hydrogen side filter and the hydrogen side cooler, so that the quality of the refluxed electrolyte is ensured.
A second return line 9 is further provided between the oxygen side separator 1 and the electrolytic tank 5, and the second return line 9 is provided with the oxygen side filter 10 and the oxygen side cooler 11 in this order along the liquid flow direction. The electrolyte separated in the oxygen side separator 1 is refluxed into the electrolytic tank through the second reflux pipeline 9, and sequentially passes through the filtration and cooling of the oxygen side filter and the oxygen side cooler, so that the quality of the refluxed electrolyte is ensured.
A hydrogen side pump 12 is also arranged on the first return line 6 between the hydrogen side cooler 2 and the electrolysis cell 5. An oxygen side pump 13 is also arranged on the second return line 9 between the oxygen side cooler 1 and the electrolysis cell 5. The arrangement of the hydrogen side pump and the oxygen side pump improves the efficiency of the electrolyte in the hydrogen side separator and the oxygen side separator flowing back to the electrolytic tank 5, so that the electrolyte in the electrolytic tank is sufficient, and the electrolytic efficiency is ensured.
It should be noted that in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (10)
1. The pressure difference adjusting device of the electrolytic hydrogen production system is characterized by comprising an oxygen side separator, a hydrogen side separator and a pipeline which is communicated with the oxygen side separator and the hydrogen side separator, wherein a movable part for adjusting the pressure difference between two sides of the oxygen side separator and the hydrogen side separator is arranged in the pipeline.
2. A differential pressure regulating device for an electrolytic hydrogen production system as recited in claim 1, wherein when the movable member is a piston, the piston is movably disposed within the conduit.
3. The pressure differential accommodating device of an electrolytic hydrogen production system as recited in claim 2, further comprising a controller, wherein a first proximity switch and a second proximity switch are respectively disposed on two sides of the piston in the pipeline, and the first proximity switch and the second proximity switch are respectively electrically connected with the controller.
4. The pressure difference adjusting device of an electrolytic hydrogen production system according to claim 1, wherein when the movable member is a gas film, the gas film is fixedly provided in the pipe at a position of 1/3 of the position near the oxygen side separator.
5. A differential pressure regulating device for an electrolytic hydrogen production system as claimed in claim 4, wherein said gas film is at least of a double-layer film structure.
6. An electrolytic hydrogen production system, characterized by comprising a differential pressure regulating device of an electrolytic hydrogen production system as claimed in any one of claims 1-5, and further comprising an electrolytic tank, both ends of which are respectively communicated with the hydrogen side separator and the oxygen side separator through pipelines.
7. An electrolytic hydrogen production system as recited in claim 6, wherein a first return line is further provided between the hydrogen side separator and the electrolyzer, the first return line having a hydrogen side filter and a hydrogen side cooler disposed in that order along the liquid flow direction.
8. An electrolytic hydrogen production system as recited in claim 6 wherein a second return line is also provided between the oxygen side separator and the electrolyzer, the second return line having the oxygen side filter and oxygen side cooler in sequence along the liquid flow direction.
9. An electrolytic hydrogen production system as recited in claim 7 wherein a hydrogen side pump is also provided on the first return line between the hydrogen side cooler and the electrolyzer.
10. An electrolytic hydrogen production system as recited in claim 8 wherein an oxygen side pump is also provided in the second return line between the oxygen side cooler and the electrolyzer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122311265.1U CN218893744U (en) | 2021-09-23 | 2021-09-23 | Differential pressure adjusting device of electrolytic hydrogen production system and electrolytic hydrogen production system |
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| CN202122311265.1U CN218893744U (en) | 2021-09-23 | 2021-09-23 | Differential pressure adjusting device of electrolytic hydrogen production system and electrolytic hydrogen production system |
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| CN218893744U true CN218893744U (en) | 2023-04-21 |
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