Alkaline water electrolysis hydrogen production system

Abstract

The invention discloses an alkaline water electrolysis hydrogen production system which comprises a gas-liquid separation device and at least two electrolytic cells, so that gas-liquid mixtures generated by electrolysis of the at least two electrolytic cells can be gathered in the same gas-liquid separation device; the gas-liquid separation device comprises at least two chambers, the chambers are in one-to-one correspondence with the electrolytic cells, a diaphragm is arranged between every two adjacent chambers, and the diaphragms can isolate gas in the adjacent chambers; the at least two chambers are connected with gas outlet pipelines, gas purity analyzers are arranged on the gas outlet pipelines so that the gas purity analyzers can correspondingly detect the purity of gas generated in different electrolytic cells, and the gas purity analyzers are provided with warning units, so that in the hydrogen production process, in the case that the corresponding gas purity does not reach the standard, the corresponding gas purity can be detected, and the corresponding gas purity can be detected. According to the hydrogen production system, the warning unit is used for warning, so that a worker can know the operation conditions of different electrolytic cells in time so as to maintain the corresponding electrolytic cells, the purity stability of gas generated in the hydrogen production system is improved, and the safety of the hydrogen production system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production by electrolyzing water, and more specifically, to an alkaline electrolyzing water hydrogen production system. Background Art

[0002] With the rapid development of the hydrogen energy industry, in the existing alkaline electrolyzing water hydrogen production system, usually a set of gas-liquid separation device drives multiple hydrogen production electrolyzers to produce hydrogen synchronously, and the gas-liquid mixtures generated by the electrolysis reactions in the multiple electrolyzers converge in the same set of gas-liquid separation device for gas-liquid separation; however, due to the different operating conditions of different hydrogen production electrolyzers, the gas purities in the gas-liquid mixtures generated by the electrolysis reactions in different electrolyzers are different, resulting in unstable purity of the gas separated in the gas-liquid separation device, and due to the lag in fault warning for the gas purities in different electrolyzers, there are safety hazards in the hydrogen production system.

[0003] In summary, how to improve the stability of the gas purity generated in the hydrogen production system and improve the safety of the hydrogen production system are problems that need to be solved urgently by those skilled in the art at present. Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide an alkaline electrolyzing water hydrogen production system to improve the stability of the gas purity generated in the hydrogen production system and improve the safety of the hydrogen production system.

[0005] To achieve the above purpose, the present application provides the following technical solutions: An alkaline electrolyzing water hydrogen production system, comprising: a gas-liquid separation device and at least two electrolyzers; wherein, at least two of the electrolyzers are all connected to the gas-liquid separation device, so that the gas-liquid mixtures electrolyzed by at least two of the electrolyzers all converge in the gas-liquid separation device; the gas-liquid separation device includes at least two chambers, the chambers correspond to the electrolyzers one by one, diaphragms are arranged between adjacent chambers, the diaphragms can isolate the gases in adjacent chambers, and the diaphragms can allow the liquids in adjacent chambers to communicate with each other; at least two of the chambers are all connected with gas outlet pipelines, gas purity analyzers are arranged on all the gas outlet pipelines, the number of the gas purity analyzers is at least two, the gas purity analyzers correspond to the chambers one by one, and the gas purity analyzers are used to detect the gas purity in the corresponding chambers.

[0006] In some embodiments, the diaphragm is a polyphenylene sulfide diaphragm; Or, the diaphragm is a composite diaphragm formed by a hydrophobic coating, nano-ceramics and a hydrophilic layer.

[0007] In some embodiments, the gas-liquid separation device includes a first chamber and a second chamber; the first chamber is provided with a first flange, the second chamber is provided with a second flange, and the first chamber and the second chamber are detachably and fixedly connected through the first flange and the second flange; the diaphragm is fixedly connected between the first flange and the second flange.

[0008] In some embodiments, the electrolytic cell includes a first electrolytic cell and a second electrolytic cell; the first chamber is provided with a first gas-liquid inlet, and the first electrolytic cell is communicated with the first gas-liquid inlet; the second chamber is provided with a second gas-liquid inlet, and the second electrolytic cell is communicated with the second gas-liquid inlet; both the first gas-liquid inlet and the second gas-liquid inlet are arranged in the middle of the gas-liquid separation device.

[0009] In some embodiments, the first chamber is provided with a first gas outlet, the second chamber is provided with a second gas outlet, and both the first gas outlet and the second gas outlet are arranged at the top of the gas-liquid separation device; the first gas outlet is connected with a first gas outlet pipeline, and a first gas purity analyzer is arranged on the first gas outlet pipeline; the second gas outlet is connected with a second gas outlet pipeline, and a second gas purity analyzer is arranged on the second gas outlet pipeline; the first gas purity analyzer includes a first warning unit, and the second gas purity analyzer includes a second warning unit.

[0010] In some embodiments, a first scrubber and a first cooling tower are arranged on the first gas outlet pipeline, and the first scrubber, the first cooling tower and the first gas purity analyzer are distributed in sequence along the gas flow direction; a second scrubber and a second cooling tower are arranged on the second gas outlet pipeline, and the second scrubber, the second cooling tower and the second gas purity analyzer are distributed in sequence along the gas flow direction.

[0011] In some embodiments, the gas outlet of the first gas outlet pipeline and the gas outlet of the second gas outlet pipeline are communicated with the same mixing pipeline.

[0012] In some embodiments, the gas-liquid separation device is further provided with a liquid outlet, and the liquid outlet is arranged at the bottom end of the gas-liquid separation device; the liquid outlet is communicated with at least two of the electrolytic cells through a circulation pump.

[0013] In some embodiments, the gas-liquid separation device is further provided with a liquid level gauge upper interface and a liquid level gauge lower interface; the liquid level gauge upper interface and the liquid level gauge lower interface are used for connecting a liquid level gauge, and the liquid level gauge is used for detecting the liquid level height in the gas-liquid separation device.

[0014] In some embodiments, a mounting seat is further arranged at the bottom end of the gas-liquid separation device.

[0015] The alkaline electrolyzed water hydrogen production system provided by the present application includes a gas-liquid separation device and at least two electrolytic cells. At least two electrolytic cells are all connected to the gas-liquid separation device, so that the gas-liquid mixtures electrolytically generated by at least two electrolytic cells can converge in the same gas-liquid separation device for gas-liquid separation. The gas-liquid separation device includes at least two chambers. The chambers correspond to the electrolytic cells one by one, and a diaphragm is arranged between adjacent chambers. The diaphragm can isolate the gases in adjacent chambers, and the diaphragm can allow the liquids in adjacent chambers to communicate with each other, so that during the gas-liquid separation process, the gases in different chambers can correspond to different electrolytic cells one by one. At least two chambers are all connected with gas outlet pipelines, and gas purity analyzers for detecting the gases in the chambers are arranged on all the gas outlet pipelines. The gas purity analyzers correspond to the chambers one by one, so that the gas purity analyzers can respectively detect the gas purity generated in different electrolytic cells. In this way, during the hydrogen production process, the gases in different chambers can be isolated by the diaphragm, and the gas purity in different chambers can be detected by the gas purity analyzers, so that the staff can timely know the operating conditions of different electrolytic cells, maintain the corresponding electrolytic cells, improve the stability of the gas purity generated in the hydrogen production system, and improve the safety of the hydrogen production system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0017] Figure 1 is a schematic diagram of the overall structure of the alkaline electrolyzed water hydrogen production system provided by the embodiment of the present application; Figure 2 is a schematic diagram of the structure of the gas-liquid separation device provided by the embodiment of the present application.

[0018] DESCRIPTION OF THE REFERENCE NUMERALS 1 - First electrolytic cell, 2 - Second electrolytic cell, 3 - Gas-liquid separation device, 30 - Diaphragm, 31 - First chamber, 311 - First gas-liquid inlet, 312 - First gas outlet, 313 - First flange, 32 - Second chamber, 321 - Second gas-liquid inlet, 322 - Second gas outlet, 323 - Second flange, 33 - Liquid outlet, 34 - Mounting seat, 351 - Upper interface of liquid level gauge, 352 - Lower interface of liquid level gauge, 4 - First gas purity analyzer, 5 - Second gas purity analyzer. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part rather than all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and the appended claims of the present application, the singular forms "a", "an", "the", "above-mentioned", "said", "this" are also intended to include expressions such as "one or more", unless the context clearly indicates otherwise.

[0021] Reference to "one embodiment" or "some embodiments" etc. described in this specification means that a specific feature, structure or characteristic described in combination with the embodiment is included in one or more embodiments of the present application. Thus, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0022] The "multiple" involved in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the terms such as "first" and "second" are only used for the purpose of distinguishing descriptions and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0023] Such as Figure 1As shown in the figure, the alkaline electrolyzed water hydrogen production system provided by the embodiment of the present application includes a gas-liquid separation device 3 and at least two electrolytic cells. Among them, at least two electrolytic cells are all connected to the gas-liquid separation device 3, so that the gas-liquid mixtures electrolyzed by at least two electrolytic cells are all gathered in the same gas-liquid separation device 3 for gas-liquid separation; the gas-liquid separation device 3 includes at least two chambers, the chambers correspond to the electrolytic cells one by one, and a diaphragm 30 is arranged between adjacent chambers. The diaphragm 30 can isolate the gases in adjacent chambers and allow the liquids in adjacent chambers to communicate with each other, so that during the gas-liquid separation process, the gases in different chambers can correspond to different electrolytic cells one by one; at least two chambers are all connected with gas outlet pipelines, and gas purity analyzers are arranged on all the gas outlet pipelines. There are at least two gas purity analyzers, and the gas purity analyzers correspond to the chambers one by one, so that the gas purity analyzers can respectively detect the gas purity generated in the corresponding different electrolytic cells. In this way, during the hydrogen production process, the gas-liquid mixtures generated by different electrolytic cells flow into the corresponding chambers of the gas-liquid separation device 3, the gases in different chambers are isolated by the diaphragm, and the purity of the gases in different chambers is detected by the gas purity analyzer, so that the staff can timely know the operating conditions of different electrolytic cells and timely maintain the corresponding electrolytic cells, improving the stability of the gas purity generated in the hydrogen production system and improving the safety of the hydrogen production system.

[0024] It should be noted that the electrolytic reaction of the electrolytic cell can generate a gas-liquid mixture of hydrogen and a gas-liquid mixture of oxygen, and respectively transport them to the hydrogen gas-liquid separator and the oxygen gas-liquid separator. The hydrogen production system provided by the embodiment of the present application can be applicable to both the hydrogen generation end and the oxygen generation end. The embodiment of the present application takes hydrogen as an example for specific illustration. Therefore, only one end of the electrolytic cell connection is shown in the figure for illustration. In actual situations, the electrolytic cell can be respectively connected to the hydrogen gas-liquid separator and the oxygen gas-liquid separator. Both the hydrogen separator and the oxygen separator can be the gas-liquid separation device 3 provided by the embodiment of the present application, which will not be elaborated here.

[0025] It should be noted that a certain number of baffles or baffle plates are arranged in the gas-liquid separation device 3. After the gas-liquid mixture electrolyzed in the electrolytic cell enters the gas-liquid separation device, by changing the direction of the baffle or baffle plate, the liquid droplets adhere to the baffle or baffle plate due to inertia and converge and fall to the bottom end of the gas-liquid separation device 3, and the gas can bypass the baffle or baffle plate and naturally rise to the top end of the gas-liquid separation device 3 to achieve gas-liquid separation.

[0026] It should be noted that the diaphragm 30 can allow the liquids between the chambers to communicate with each other, so that the liquid levels in the gas-liquid separation device 3 are kept consistent, such as Figure 2As shown, the gas-liquid separation device 3 is further provided with a liquid level gauge upper interface 351 and a liquid level gauge lower interface 352. A liquid level gauge is connected through the liquid level gauge upper interface 351 and the liquid level gauge lower interface 352 to detect the liquid level height inside the gas-liquid separation device 3, so that the liquid level inside the gas-liquid separation device 3 is maintained at a slightly higher position near its center line. In actual situations, since the gas-liquid separation device for hydrogen is connected to the gas-liquid separation device for oxygen, by keeping the liquid levels of both the gas-liquid separation device for hydrogen and the gas-liquid separation device for oxygen within the specified range, a large deviation in the liquid levels between the two is avoided, so as to prevent the intermixing of hydrogen and oxygen.

[0027] In some embodiments, the diaphragm 30 can be a polyphenylene sulfide (PPS) diaphragm. The PPS diaphragm has a precise microporous structure, and its pore diameter allows liquid to pass through. Moreover, due to the low surface tension of gas, gas cannot pass through the PPS diaphragm. By setting the PPS diaphragm, the effect of isolating gas between chambers and allowing liquid to communicate can be achieved.

[0028] In other embodiments, the diaphragm 30 can be a composite diaphragm formed by a hydrophobic coating, nano-ceramics, and a hydrophilic layer. Through the multi-layer synergistic effect of the hydrophobic layer and the nano-pores of the nano-ceramics, the isolation of gas is achieved, and through the conduction of the hydrophilic layer, the communication of liquid is realized, so as to achieve the effect of isolating gas between chambers and allowing liquid to communicate.

[0029] In additional embodiments, the diaphragm 30 can also be a composite diaphragm formed by a combination of other various materials or structures that can achieve hydrophilic properties and gas isolation functions. The embodiments of the present application do not limit this.

[0030] As Figures 1 - 2 shown, the gas-liquid separation device 3 includes a first chamber 31 and a second chamber 32, and the electrolytic cell includes a first electrolytic cell 1 and a second electrolytic cell 2, so that the chambers and the electrolytic cells correspond one by one.

[0031] In other embodiments, the gas-liquid separation device 3 can also include three, four or more chambers, and the electrolytic cell includes three, four or more electrolytic cells corresponding one by one to the chambers, so as to improve the hydrogen production efficiency. The embodiments of the present application do not limit this.

[0032] As Figure 2 shown, the first chamber 31 is provided with a first flange 313, the second chamber 32 is provided with a second flange 323, and the first chamber 31 and the second chamber 32 are detachably fixedly connected through the first flange 313 and the second flange 323 to facilitate the maintenance of the gas-liquid separation device 3.

[0033] The diaphragm 30 is fixedly connected between the first flange 313 and the second flange 323. During actual operation, the diaphragm 30 can be pressed between the first flange 313 and the second flange 323 by threaded fasteners to fix the diaphragm 30.

[0034] It should be noted that in actual situations, a sealing structure, such as a gasket, a sealing ring, etc., is provided between the first flange 313 and the second flange 323 to ensure the sealing effect between the first chamber 31 and the second chamber 32 and to ensure the stability of the hydrogen production process.

[0035] As Figure 2 shown, the first chamber 31 is provided with a first gas-liquid inlet 311, and the first electrolytic cell 1 is connected to the first gas-liquid inlet 311, so that the gas-liquid mixture generated by the electrolysis of the first electrolytic cell 1 enters the first chamber 31 through the first gas-liquid inlet 311. Under the action of the diaphragm 30, the gas generated by the first electrolytic cell 1 is isolated in the first chamber 31; the second chamber 32 is provided with a second gas-liquid inlet 321, and the second electrolytic cell 2 is connected to the second gas-liquid inlet 321, so that the gas-liquid mixture generated by the electrolysis of the second electrolytic cell 2 enters the second chamber 32 through the second gas-liquid inlet 321. Under the action of the diaphragm 30, the gas generated by the second electrolytic cell 2 is isolated in the second chamber 32, and the liquids in the first chamber 31 and the second chamber 32 are made to communicate with each other to facilitate subsequent liquid circulation.

[0036] As Figure 2 shown, both the first gas-liquid inlet 311 and the second gas-liquid inlet 321 are provided in the middle of the gas-liquid separation device 3 and are lower than the center line of the gas-liquid separation device 3. After the gas-liquid mixtures generated by the first electrolytic cell 1 and the second electrolytic cell 2 enter the gas-liquid separation device 3 through the first gas-liquid inlet 311 and the second gas-liquid inlet 321, they can act on the baffles or baffle plates in the gas-liquid separation device 3 to improve the efficiency of gas-liquid separation.

[0037] As Figure 2 shown, the first chamber 31 is provided with a first gas outlet 312, and the second chamber 32 is provided with a second gas outlet 322. Both the first gas outlet 312 and the second gas outlet 322 are provided at the top of the gas-liquid separation device 3 so that the gases generated by the first electrolytic cell 1 and the second electrolytic cell 2 can flow out through the first gas outlet 312 and the second gas outlet 322 respectively.

[0038] The first gas outlet 312 is connected to a first gas outlet pipeline, and a first gas purity analyzer 4 is arranged on the first gas outlet pipeline. The first gas purity analyzer 4 includes a first warning unit, so that the first gas purity analyzer 4 can correspondingly detect the purity of the gas generated in the first electrolyzer 1, and in the case of unqualified purity, issue a warning through the first warning unit to timely remind the staff, so that the staff can accurately know the working condition of the first electrolyzer 1, and correspondingly carry out timely maintenance to improve the stability of the gas purity of the hydrogen production system and improve the safety of the hydrogen production system.

[0039] It should be noted that the first gas purity analyzer 4 also includes a purity acquisition unit, a comparison unit, a transmission unit, etc., which can obtain the purity data of the gas in the first gas outlet pipeline, compare it with the preset gas purity, and transmit it to the first warning unit through the transmission unit to achieve the effect of detecting the gas purity and warning of the first gas purity analyzer 4.

[0040] In actual situations, a first scrubber and a first cooling tower are also arranged on the first gas outlet pipeline, and the first scrubber, the first cooling tower and the first gas purity analyzer 4 are arranged in sequence along the gas flow direction, so that the gas in the first chamber 31 passes through the first scrubber and the first cooling tower for scrubbing and cooling in sequence, and then is detected by the first gas purity analyzer 4 to improve the accuracy of the detection by the first gas purity analyzer 4.

[0041] The second gas outlet 322 is connected to a second gas outlet pipeline, and a second gas purity analyzer 5 is arranged on the second gas outlet pipeline. The second gas purity analyzer 5 includes a second warning unit, so that the second gas purity analyzer 5 can correspondingly detect the purity of the gas generated in the second electrolyzer 2, and in the case of unqualified purity, issue a warning through the second warning unit to timely remind the staff, so that the staff can accurately know the working condition of the second electrolyzer 2, and correspondingly carry out timely maintenance to improve the stability of the gas purity of the hydrogen production system and improve the safety of the hydrogen production system.

[0042] It should be noted that the second gas purity analyzer 5 also includes a purity acquisition unit, a comparison unit, a transmission unit, etc., which can obtain the purity data of the gas in the second gas outlet pipeline, compare it with the preset gas purity, and transmit it to the second warning unit through the transmission unit to achieve the effect of detecting the gas purity and warning of the second gas purity analyzer 5.

[0043] In actual situations, a second scrubber and a second cooling tower are also provided on the second gas outlet pipeline, and the second scrubber, the second cooling tower, and the second gas purity analyzer 5 are arranged in sequence along the gas flow direction. Such that the gas in the second chamber 32 passes through the second scrubber and the second cooling tower for scrubbing and cooling in sequence, and then is detected by the second gas purity analyzer 5, so as to improve the accuracy of the detection by the second gas purity analyzer 5.

[0044] It should be noted that both the first warning unit and the second warning unit can be devices capable of giving warnings such as an audible and visual alarm, or can display data or charts through a display screen, or can adjust the corresponding electrolytic cell through a feedback signal by connecting to a control system. The embodiments of the present application do not make limitations in this regard.

[0045] To facilitate the collection of gas, the gas outlet of the first gas outlet pipeline and the gas outlet of the second gas outlet pipeline are connected to the same mixing pipeline, such that the gas in the first chamber 31 and the gas in the second chamber 32 are respectively detected by the first gas purity analyzer 4 and the second gas purity analyzer 5 and then converge into the mixing pipeline. In this way, since the gas in the first chamber 31 and the second chamber 32 are both connected to the same mixing pipeline, the pressures in the first chamber 31 and the second chamber 32 are kept balanced, avoiding unilateral pressure on the diaphragm 30 and prolonging the service life of the diaphragm 30.

[0046] As Figure 2 shown, a liquid outlet 33 is further provided at the bottom end of the gas-liquid separation device 3, and the liquid outlet 33 is connected to the electrolytic cell through a circulation pump.

[0047] It should be noted that the gas-liquid mixture electrolytically separated by the electrolytic cell is a mixture of electrolyte and gas. After the gas-liquid mixture enters the gas-liquid separation device 3 for gas-liquid separation, the separated electrolyte flows out from the liquid outlet 33, and after cooling and filtering in sequence, it flows back into the electrolytic cell through the circulation pump to form a circulation loop of the electrolyte.

[0048] As Figure 2 shown, a mounting seat 34 is further provided at the bottom end of the gas-liquid separation device 3, so as to mount the gas-liquid separation device 3 to the main body frame through the mounting seat 34 for normal operation.

[0049] During the operation of the alkaline electrolytic water hydrogen production system provided in the embodiments of the present application, the gas-liquid mixtures electrolytically generated by the first electrolytic cell 1 and the second electrolytic cell 2 respectively enter the first chamber 31 and the second chamber 32 of the gas-liquid separation device 3. Under the action of the diaphragm 30, the gases in the first chamber 31 and the second chamber 32 are isolated, and the liquids communicate with each other. After gas-liquid separation, the gases in the first chamber 31 and the second chamber 32 respectively enter the first gas outlet pipeline and the second gas outlet pipeline, and the first gas purity analyzer 4 and the second gas purity analyzer 5 are used to correspondingly analyze the gases in the first electrolytic cell 1 and the second electrolytic cell 2. In the case where the corresponding gas purity does not meet the standard, corresponding warnings are given through the first warning unit or the second warning unit, so that the staff can timely learn about the working conditions of each electrolytic cell and timely maintain the corresponding electrolytic cell, improving the stability of the gas purity in the hydrogen production system and the safety of the hydrogen production system.

[0050] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An alkaline electrolyzed water hydrogen production system, characterized in that, Comprising: A gas-liquid separation device (3) and at least two electrolytic cells; Wherein, at least two of the electrolytic cells are all connected to the gas-liquid separation device (3), such that the gas-liquid mixtures electrolytically generated by at least two of the electrolytic cells all converge in the gas-liquid separation device (3); The gas-liquid separation device (3) comprises at least two chambers, the chambers corresponding one-to-one to the electrolytic cells, a diaphragm (30) being provided between adjacent chambers, the diaphragm (30) being capable of isolating the gases in adjacent chambers, and the diaphragm being capable of allowing the liquids in adjacent chambers to communicate with each other; At least two of the chambers are all connected to an outlet gas pipeline, gas purity analyzers being provided on all of the outlet gas pipelines, the number of gas purity analyzers being at least two, the gas purity analyzers corresponding one-to-one to the chambers, and the gas purity analyzers being used for detecting the gas purity in the corresponding chambers.

2. The alkaline electrolyzed water hydrogen production system according to claim 1, wherein The diaphragm (30) is a polyphenylene sulfide diaphragm; Alternatively, the diaphragm (30) is a composite diaphragm formed by a hydrophobic coating, nano-ceramics and a hydrophilic layer.

3. The alkaline electrolyzed water hydrogen production system according to claim 1, characterized in that, The gas-liquid separation device (3) comprises a first chamber (31) and a second chamber (32); The first chamber (31) is provided with a first flange (313), the second chamber (32) is provided with a second flange (323), and the first chamber (31) and the second chamber (32) are detachably fixedly connected by the first flange (313) and the second flange (323); The diaphragm (30) is fixedly connected between the first flange (313) and the second flange (323).

4. The alkaline electrolyzed water hydrogen production system according to claim 3, wherein, The electrolytic cell comprises a first electrolytic cell (1) and a second electrolytic cell (2); The first chamber (31) is provided with a first gas-liquid inlet (311), and the first electrolytic cell (1) is connected to the first gas-liquid inlet (311); the second chamber (32) is provided with a second gas-liquid inlet (321), and the second electrolytic cell (2) is connected to the second gas-liquid inlet (321); Both the first gas-liquid inlet (311) and the second gas-liquid inlet (321) are provided in the middle of the gas-liquid separation device (3).

5. The alkaline electrolyzed water hydrogen production system according to claim 3, characterized in that, The first chamber (31) is provided with a first gas outlet (312), the second chamber (32) is provided with a second gas outlet (322), and both the first gas outlet (312) and the second gas outlet (322) are provided at the top of the gas-liquid separation device (3); The first gas outlet (312) is connected to a first outlet gas pipeline, and a first gas purity analyzer (4) is provided on the first outlet gas pipeline; the second gas outlet (322) is connected to a second outlet gas pipeline, and a second gas purity analyzer (5) is provided on the second outlet gas pipeline; The first gas purity analyzer (4) comprises a first warning unit, and the second gas purity analyzer (5) comprises a second warning unit.

6. The alkaline electrolyzed water hydrogen production system according to claim 5, wherein A first scrubber and a first cooling tower are provided on the first outlet gas pipeline, and the first scrubber, the first cooling tower and the first gas purity analyzer (4) are distributed in sequence along the gas flow direction; A second scrubber and a second cooling tower are provided on the second gas outlet pipeline, and the second scrubber, the second cooling tower, and a second gas purity analyzer (5) are arranged in sequence along the gas flow direction.

7. The alkaline electrolyzed water hydrogen production system according to claim 5, wherein, The gas outlet of the first gas outlet pipeline and the gas outlet of the second gas outlet pipeline are connected to the same mixing pipeline.

8. The alkaline electrolyzed water hydrogen production system according to claim 1, wherein The gas-liquid separation device (3) is further provided with a liquid outlet (33), and the liquid outlet (33) is arranged at the bottom end of the gas-liquid separation device (3); The liquid outlet (33) is connected to at least two of the electrolytic cells through a circulation pump.

9. The alkaline electrolyzed water hydrogen production system according to claim 1, wherein, The gas-liquid separation device (3) is further provided with a liquid level gauge upper interface (351) and a liquid level gauge lower interface (352); The liquid level gauge upper interface (351) and the liquid level gauge lower interface (352) are used to connect a liquid level gauge, and the liquid level gauge is used to detect the liquid level height in the gas-liquid separation device (3).

10. The alkaline electrolyzed water hydrogen production system according to any one of claims 1-9, characterized in that, An installation seat (34) is further arranged at the bottom end of the gas-liquid separation device (3).

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