Gas-liquid separation and liquid storage balancing device for anion exchange membrane water electrolyzer

Abstract

The gas-liquid separation and liquid storage balancing device comprises a cathode liquid storage chamber and an anode liquid storage chamber, one side wall of the cathode liquid storage chamber is fixedly provided with a cathode flow channel communicated with the inside of the cathode liquid storage chamber, one side wall of the anode liquid storage chamber is fixedly provided with an anode flow channel communicated with the inside of the anode liquid storage chamber, and the cathode flow channel is communicated with the inside of the anode liquid storage chamber. The cathode flow channel is communicated with the anode flow channel, a blocking filter membrane capable of exchanging water molecules and blocking hydrogen and oxygen from passing through is arranged between the cathode flow channel and the anode flow channel, and the blocking filter membrane is arranged between the anode flow channel and the cathode flow channel and can isolate gas such as hydrogen and oxygen generated in the cathode liquid storage chamber and the anode liquid storage chamber. And meanwhile, water molecules can be freely exchanged by the barrier filter membrane, so that the electrolyte concentration balance between the anode liquid storage chamber and the cathode liquid storage chamber is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to water electrolysis hydrogen production technical field especially a kind of gas-liquid separation and liquid storage balance device for anion exchange membrane water electrolyzer. BACKGROUND

[0002] When large-current AEMWE (anion exchange membrane water electrolyzer) is researched in laboratory, cathode and anode electrolyte are respectively stored in respective liquid storage pool, and are circulated to reactor by peristaltic pump to carry out electrolytic reaction. However, cathode consumes water in hydrogen production process, to cause the concentration of lye (such as KOH) in cathode liquid storage pool to be constantly increased, and anode generates water in oxygen production process, to cause the concentration of lye in anode liquid storage pool to be constantly decreased. In addition, the rate of water consumption of cathode is twice the rate of water generation of anode, and this concentration difference can cause the cell voltage between cathode and anode to gradually increase, to reduce the overall performance of device. To maintain the stability of reaction liquid concentration, water needs to be supplemented to cathode liquid storage pool regularly, and lye needs to be supplemented to anode liquid storage pool. In view of this, some experiments adopt the mode that cathode and anode share one liquid storage pool, so that liquid supplement work can be reduced, and only water needs to be supplemented to liquid pool. But this scheme has significant shortcomings. Sharing one liquid storage pool can cause hydrogen produced by cathode and oxygen produced by anode to inevitably mix in electrolyte, which can cause safety hazard under large-current reaction condition. In addition, dissolved hydrogen can be transported to anode of device along with electrolyte, or dissolved oxygen can permeate into cathode of device, to cause test performance to decline.

[0003] Therefore, a new gas-liquid separation and liquid storage balance device for anion exchange membrane water electrolyzer is urgently needed to solve the above technical problems. UTILITY MODEL CONTENT

[0004] The utility model aims at solving above-mentioned technical problem, i.e. solving the problem that hydrogen produced by cathode and oxygen produced by anode can inevitably mix in electrolyte when existing cathode and anode share one liquid storage pool, which can cause safety hazard under large-current reaction condition, and solving the problem that dissolved hydrogen can be transported to anode of device along with electrolyte, or dissolved oxygen can permeate into cathode of device, to cause test performance to decline.

[0005] To achieve the above object, the utility model provides a kind of gas-liquid separation and liquid storage balancing device for anion exchange membrane water electrolyzer, including cathode liquid storage chamber and anode liquid storage chamber, the anode liquid storage chamber is used to deliver anode electrolyte to the anion exchange membrane water electrolyzer, the cathode liquid storage chamber is used to deliver cathode electrolyte to the anion exchange membrane water electrolyzer, one side wall of the cathode liquid storage chamber is fixed with cathode flow channel communicated with its inside, one side wall of the anode liquid storage chamber is fixed with anode flow channel communicated with its inside, the cathode flow channel is communicated with the anode flow channel, and barrier filter membrane that can carry out water molecule exchange and block hydrogen and oxygen passage is arranged between it.

[0006] In the above specific embodiment of the gas-liquid separation and liquid storage balancing device for anion exchange membrane water electrolyzer, the gas-liquid separation and liquid storage balancing device further includes a first gas-liquid separator and a second gas-liquid separator, the anode electrolyte on the anion exchange membrane water electrolyzer is returned to the anode liquid storage chamber after gas-liquid separation and filtration by the first gas-liquid separator, and the cathode electrolyte on the anion exchange membrane water electrolyzer is returned to the cathode liquid storage chamber after gas-liquid separation and filtration by the second gas-liquid separator.

[0007] In the above specific embodiment of the gas-liquid separation and liquid storage balancing device for anion exchange membrane water electrolyzer, the first gas-liquid separator and the second gas-liquid separator have the same structure, the first gas-liquid separator includes a separation chamber and a filtration assembly, the top end of the separation chamber is provided with a gas discharge port, the bottom end is provided with a liquid outlet, and the side wall is provided with a liquid return port, the filtration assembly is installed in the separation chamber to filter the electrolyte flowing out through the liquid return port, the liquid return port on the first gas-liquid separator is communicated with the anode electrolyte return port on the anion exchange membrane water electrolyzer, the liquid outlet of the first gas-liquid separator is communicated with the anode liquid storage chamber to return the filtered anode electrolyte, the liquid return port on the second gas-liquid separator is communicated with the cathode electrolyte return port on the anion exchange membrane water electrolyzer, and the liquid outlet of the second gas-liquid separator is communicated with the cathode liquid storage chamber to return the filtered cathode electrolyte.

[0008] In the above specific embodiment of the gas-liquid separation and liquid storage balancing device for anion exchange membrane water electrolyzer, the filtration assembly includes a supporting plate and a return filtration membrane, the supporting plate is fixed in the separation chamber below the liquid return port, the supporting plate is provided with a plurality of uniformly distributed liquid permeable holes, and the supporting plate is provided with a return filtration membrane with hydrophilic alkali resistance.

[0009] In the above specific embodiment of the gas-liquid separation and liquid storage balancing device for anion exchange membrane water electrolyzer, at least one annular sealing gasket is arranged between the cathode flow channel and the anode flow channel, and the barrier filter membrane is installed in the inner hole of the annular sealing gasket.

[0010] In the specific embodiment of the gas-liquid separation and liquid storage balancing device for the anion exchange membrane water electrolyzer, the barrier filter membrane is a PP membrane.

[0011] In the specific embodiment of the gas-liquid separation and liquid storage balancing device for the anion exchange membrane water electrolyzer, the cathode flow channel and the anode flow channel are locked by the locking assembly.

[0012] In the specific embodiment of the gas-liquid separation and liquid storage balancing device for the anion exchange membrane water electrolyzer, the first pressing plate is outwardly extended on the outer peripheral wall of the one end of the anode flow channel away from the anode liquid storage chamber, the second pressing plate is outwardly extended on the outer peripheral wall of the one end of the cathode flow channel away from the cathode liquid storage chamber, the locking assembly comprises an anode locking disc and a cathode locking disc, the anode locking disc is sleeved on the anode flow channel, the cathode locking disc is sleeved on the cathode flow channel, and the anode locking disc and the cathode locking disc clamp the first pressing plate and the second pressing plate in the middle and are detachably fixedly connected through the first connecting piece.

[0013] In the specific embodiment of the gas-liquid separation and liquid storage balancing device for the anion exchange membrane water electrolyzer, the anode locking disc and the cathode locking disc are the same in structure, the anode locking disc comprises an upper locking disc and a lower locking disc, the upper locking disc and the lower locking disc are sleeved on the anode flow channel in a butt joint mode and are spliced and fixed through the second connecting piece, the axis of the second connecting piece is perpendicular to the center line of the anode flow channel, and the axis of the first connecting piece is parallel to the center line of the anode flow channel.

[0014] In the specific embodiment of the gas-liquid separation and liquid storage balancing device for the anion exchange membrane water electrolyzer, the surfaces of the anode locking disc and the cathode locking disc are coated with a polytetrafluoroethylene coating.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. The barrier filter membrane is arranged between the anode flow channel and the cathode flow channel, can isolate the generated gas such as hydrogen and oxygen in the anode liquid storage chamber and the cathode liquid storage chamber, and allows free exchange of water molecules, so that the electrolyte concentration balance between the anode liquid storage chamber and the cathode liquid storage chamber is ensured.

[0017] 2. The utility model is provided with a gas-liquid separator on the electrolyte return pipeline, and the return filter membrane arranged in the gas-liquid separator can effectively block the catalyst washed down in the anion exchange membrane water electrolyzer electrolysis reaction from flowing back to the liquid storage chamber, so that the barrier filter membrane is prevented from being blocked.

[0018] 3、The design of the gas-liquid separator also considers that as the operating temperature increases, the volatile electrolyte can be refluxed, thereby maintaining the stability of the electrolyte concentration in the liquid storage chamber, which not only helps to maintain the pressure balance in the anion exchange membrane water electrolyzer, but also improves the overall efficiency and stability of the system; at the same time, the gas-liquid separator can more effectively separate gas and liquid, significantly reduce the gas reflux to the liquid storage chamber, further reduce the risk of pressure rise in the liquid storage chamber, and ensure higher performance and safety. BRIEF DESCRIPTION OF DRAWINGS

[0019] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0020] Figure 1 is a structural schematic view of the gas-liquid separation and liquid storage balancing device for the anion exchange membrane water electrolyzer provided by the present application;

[0021] Figure 2 is a structural schematic view of the first gas-liquid separator;

[0022] Figure 3 is a three-dimensional structural view of the anode flow channel and the cathode flow channel connected through the locking assembly;

[0023] Figure 4 is a structural schematic view of the blocking filter membrane and the annular sealing gasket connected;

[0024] Figure 5 is a structural schematic view of the anode locking disc.

[0025] LIST OF REFERENCE NUMERALS

[0026] 1, anode liquid storage chamber; 2, anode liquid storage chamber; 3, anode flow channel; 4, cathode flow channel; 5, first gas-liquid separator; 501, separation chamber; 502, supporting plate; 503, reflux filter membrane; 504, gas discharge port; 6, anion exchange membrane water electrolyzer; 7, first liquid delivery pipeline; 8, second liquid delivery pipeline; 9, third liquid delivery pipeline; 10, fourth liquid delivery pipeline; 11, fifth liquid delivery pipeline; 12, sixth liquid delivery pipeline; 13, second gas-liquid separator; 14, anode locking disc; 15, cathode locking disc; 16, annular sealing gasket; 17, blocking filter membrane; 18, first connecting piece; 19, upper locking disc; 20, lower locking disc; 21, first pressing plate; 22, second pressing plate; 23, second connecting hole; 24, first connecting hole; 25, second connecting piece. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme of the utility model will be described clearly and completely in combination with the drawings below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0028] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated system or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are used to limit parts, and are only used to distinguish the above-mentioned parts for the convenience, and the above-mentioned terms have no special meaning unless otherwise stated, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the utility model, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0030] The utility model relates to water electrolysis hydrogen production technical field especially is related to a kind of gas-liquid separation and liquid storage balance device for anion exchange membrane water electrolyser.The purpose is to solve the hydrogen gas generated by cathode and the oxygen generated by anode when existing cathode and anode share a liquid storage pool will inevitably mix in electrolyte, which can cause security hidden trouble under high current reaction condition, and solve the problem that dissolved hydrogen gas is extremely likely to be transported to device anode with electrolyte, or dissolved oxygen gas penetrates device cathode, thereby causing test performance to decline.For this purpose, the utility model provides a kind of gas-liquid separation and liquid storage balance device for anion exchange membrane water electrolyser, including cathode liquid storage chamber and anode liquid storage chamber, anode liquid storage chamber transports anode electrolyte to anion exchange membrane water electrolyser by first peristaltic pump, cathode liquid storage chamber transports cathode electrolyte to anion exchange membrane water electrolyser by second peristaltic pump, one side wall of cathode liquid storage chamber is fixed with cathode flow channel communicated with its inside, one side wall of anode liquid storage chamber is fixed with anode flow channel communicated with its inside, cathode flow channel and anode flow channel are locked by locking assembly to realize detachable fixed connection, barrier filter membrane for water molecule exchange and blocking hydrogen and oxygen is arranged between cathode flow channel and anode flow channel, can insulate dissolved gas such as hydrogen and oxygen in electrolyte in liquid storage chamber, while barrier filter membrane can let water molecule exchange freely, more can guarantee electrolyte concentration balance between anode liquid storage chamber and cathode liquid storage chamber.

[0031] Next, the gas-liquid separation and liquid storage balance device for anion exchange membrane water electrolyser provided by the utility model embodiment is described in detail in combination with the drawings.

[0032] Referring to Figures 1-3 The utility model provides a kind of gas-liquid separation and liquid storage balance device for anion exchange membrane water electrolyser, including cathode liquid storage chamber and anode liquid storage chamber, anode liquid storage chamber is used to transport anode electrolyte to anion exchange membrane water electrolyser, cathode liquid storage chamber is used to transport cathode electrolyte to anion exchange membrane water electrolyser, one side wall of cathode liquid storage chamber is fixed with cathode flow channel communicated with its inside, one side wall of anode liquid storage chamber is fixed with anode flow channel communicated with its inside, the cathode flow channel is communicated with the anode flow channel, and barrier filter membrane for water molecule exchange and blocking hydrogen and oxygen is arranged between cathode flow channel and anode flow channel.The top of cathode liquid storage chamber and anode liquid storage chamber is provided as open structure, and the open part is encapsulated by encapsulation cover.

[0033] In one embodiment, the barrier filter membrane is a PP membrane.

[0034] In one embodiment, referring to Figures 3-4At least one annular sealing gasket is arranged between the cathode flow channel and the anode flow channel, and a barrier filter membrane is arranged in the inner hole of the annular sealing gasket. The annular sealing gasket is extruded to seal the abutting part of the cathode flow channel and the anode flow channel. The number of annular sealing gaskets is determined according to the number of barrier filter membranes, and the number of barrier filter membranes is flexibly set according to actual conditions, which is not specifically limited in the present application.

[0035] In the above embodiment, the barrier filter membrane clamped between the cathode flow channel and the anode flow channel allows free exchange of water molecules, while preventing the passage of oxygen and hydrogen. This avoids the mixing of dissolved hydrogen in the cathode liquid and dissolved oxygen in the anode liquid, and better ensures the electrolyte concentration balance between the anode liquid storage chamber and the cathode liquid storage chamber, thereby reducing the potential safety hazards under high current reaction conditions and ensuring the test performance.

[0036] In one embodiment, referring to Figure 1 The gas-liquid separation and liquid storage balancing device further comprises a first gas-liquid separator and a second gas-liquid separator. The anode electrolyte on the anion exchange membrane water electrolyzer is subjected to gas-liquid separation and filtration by the first gas-liquid separator and then flows back into the anode liquid storage chamber. The cathode electrolyte on the anion exchange membrane water electrolyzer is subjected to gas-liquid separation and filtration by the second gas-liquid separator and then flows back into the cathode liquid storage chamber.

[0037] In the above embodiment, preferably, referring to Figure 2 The first gas-liquid separator and the second gas-liquid separator have the same structure. The first gas-liquid separator comprises a separation chamber and a filter assembly. The top end of the separation chamber is provided with a gas discharge port, the bottom end is provided with a liquid outlet, and the side wall is provided with a liquid return port. The filter assembly is arranged in the separation chamber to filter the electrolyte flowing out of the liquid return port. The liquid return port of the first gas-liquid separator is in communication with the anode electrolyte return port of the anion exchange membrane water electrolyzer. The liquid outlet of the first gas-liquid separator is in communication with the anode liquid storage chamber to return the filtered anode electrolyte. The liquid return port of the second gas-liquid separator is in communication with the cathode electrolyte return port of the anion exchange membrane water electrolyzer. The liquid outlet of the second gas-liquid separator is in communication with the cathode liquid storage chamber to return the filtered cathode electrolyte.

[0038] Specifically, the anode liquid storage chamber is communicated with the anion exchange membrane water electrolyzer through a first infusion pipeline, a first peristaltic pump is installed on the first infusion pipeline, an anode electrolyte return port on the anion exchange membrane water electrolyzer is communicated with a liquid return port on the first gas-liquid separator through a second infusion pipeline, a third peristaltic pump is installed on the second infusion pipeline, a liquid outlet on the first gas-liquid separator is communicated with the anode liquid storage chamber through a third infusion pipeline, the cathode liquid storage chamber is communicated with the anion exchange membrane water electrolyzer through a fourth infusion pipeline, a second peristaltic pump is installed on the fourth infusion pipeline, a cathode electrolyte return port on the anion exchange membrane water electrolyzer is communicated with a liquid return port on the second gas-liquid separator through a fifth infusion pipeline, a fourth peristaltic pump is installed on the fifth infusion pipeline, and a liquid outlet on the second gas-liquid separator is communicated with the cathode liquid storage chamber through a sixth infusion pipeline.

[0039] In the above embodiment, preferably, referring to Figure 2 , the filter assembly includes a supporting plate and a backflow filter membrane, the supporting plate is fixed in the separation chamber below the liquid return port, a plurality of uniformly distributed liquid permeable holes are arranged on the supporting plate, and the backflow filter membrane with hydrophilic alkali resistance is arranged on the supporting plate. The number of layers of the backflow filter membrane can be flexibly set according to actual use conditions, and can be one layer or two layers or three layers, etc. Exemplarily, the backflow filter membrane can be a PPS polyphenylene sulfide diaphragm. In the above embodiment, the actual size of the gas-liquid separator can be adjusted, and can be increased or reduced according to the size and current density of the connected anion exchange membrane water electrolyzer. In order to facilitate the installation of the filter assembly in the separation chamber, the top end of the separation chamber can be provided as an open structure, and a sealing cover can be detachably and fixedly connected to the open part for sealing connection, and the gas outlet is arranged on the sealing cover.

[0040] After the electrolyte reacts in the reactor, part of the solid catalyst may be washed back into the liquid storage pool with the electrolyte, and then pumped back into the anion exchange membrane water electrolyzer by the peristaltic pump. In order to solve the problem that the catalyst is washed down in the anion exchange membrane water electrolyzer during electrolysis reaction, flows into the anode liquid storage chamber and the cathode liquid storage chamber, and is adsorbed on the barrier filter membrane, thereby reducing the effect of the barrier filter membrane, a gas-liquid separator is designed, and a thin and hydrophilic alkali-resistant backflow filter membrane is arranged in the separation chamber, which effectively blocks the stripped catalyst and prevents it from blocking the barrier filter membrane.

[0041] A gas outlet is arranged at the top end of the separation chamber, the electrolyte containing gas enters the separation chamber, the gas is discharged from the gas outlet, and the electrolyte is filtered by the backflow filter membrane and then flows back to the liquid storage chamber, thereby significantly reducing the backflow of gas to the liquid storage chamber and further reducing the risk of pressure rise in the anion exchange membrane water electrolyzer.

[0042] In one embodiment, the cathode flow channel is connected and locked with the anode flow channel through a locking assembly.

[0043] In the above embodiments, preferably, referring to Figure 1 and Figure 3 , the first pressing plate is outwardly extended on the outer peripheral wall of the end of the anode flow channel away from the anode liquid storage chamber, the second pressing plate is outwardly extended on the outer peripheral wall of the end of the cathode flow channel away from the cathode liquid storage chamber, the locking assembly comprises an anode locking disc and a cathode locking disc, the anode locking disc is sleeved on the anode flow channel, the cathode locking disc is sleeved on the cathode flow channel, and the anode locking disc and the cathode locking disc clamp the first pressing plate and the second pressing plate in the middle and are detachably fixedly connected through the first connecting piece.

[0044] In the above embodiments, preferably, referring to Figure 3 and Figure 5 , the anode locking disc and the cathode locking disc are of the same structure, the anode locking disc comprises an upper locking disc and a lower locking disc, the upper locking disc and the lower locking disc are sleeved on the anode flow channel in a butt joint manner and are spliced and fixed through the second connecting piece, the axis of the second connecting piece is perpendicular to the center line of the anode flow channel, and the axis of the first connecting piece is parallel to the center line of the anode flow channel.

[0045] Specifically, the anode locking disc and the cathode locking disc are both rectangular, the corner end of each is provided with a first connecting hole, the upper locking disc and the lower locking disc are both provided with a second connecting hole, the first connecting hole and the second connecting hole are both provided with a thread, and the first connecting piece and the second connecting piece are both screws. The screws can be directly tightened without nuts.

[0046] In one embodiment, the surface of the first pressing plate and the second pressing plate is coated with a polytetrafluoroethylene coating to prevent corrosion of the alkaline solution.

[0047] In the embodiments of the present application, the materials of the cathode liquid storage chamber and the anode liquid storage chamber can be, but are not limited to, glass, polytetrafluoroethylene, polyether ether ketone, etc. In addition, the sizes of the cathode liquid storage chamber and the anode liquid storage chamber in the present application correspond to anion exchange membrane water electrolysis devices under different currents and different sizes, and can be adjusted.

[0048] The working principle of the utility model is: through the first peristaltic pump, the electrolyte in the anode storage chamber is delivered to the anion exchange membrane water electrolyzer, through the second peristaltic pump, the electrolyte in the cathode storage chamber is delivered to the anion exchange membrane water electrolyzer, oxygen and hydrogen are generated after reaction, through the third peristaltic pump, the anode electrolyte of the anion exchange membrane water electrolyzer is delivered to the first gas-liquid separator, after filtering through the reflux filter membrane, it is refluxed to the anode storage chamber, similarly, through the fourth peristaltic pump, the cathode electrolyte in the anion exchange membrane water electrolyzer is delivered to the second gas-liquid separator, after filtering through the reflux filter membrane, it is refluxed to the cathode storage chamber, forming the electrolyte circulation function.

[0049] The utility model discloses convenient to use, simple structure can adjust and control the size of two poles of anode and cathode storage chamber and the area of flow channel, improve the quick balance of cathode and anode storage chamber concentration, annular sealing gasket can be selected flexibly different membrane to adapt to different electrolytic water device, convenient to use, easy operation, fixed reliable, guarantee concentration quick balance effect. Can realize the stable operation of anion exchange membrane electrolytic water device under industrial conditions (1M KOH+60-80 DEG C) and large current (current can reach 100A). The application can be applicable to solar photovoltaic electrolytic water hydrogen production, large current electrolysis seawater hydrogen production and the like occasions.

[0050] Finally, it should be noted that: the above examples are used to illustrate the technical scheme of the utility model, but not to limit it; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it still can modify the technical scheme recorded in the foregoing each example, or make equivalent replacement to part of technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the protection scope of the technical scheme of each embodiment of the utility model.

Claims

1. A gas-liquid separation and liquid storage balancing device for an anion exchange membrane water electrolyzer, characterized in that, The device comprises a cathode liquid storage chamber and an anode liquid storage chamber, the anode liquid storage chamber is used to deliver anode electrolyte to the anion exchange membrane water electrolyzer, the cathode liquid storage chamber is used to deliver cathode electrolyte to the anion exchange membrane water electrolyzer, one side wall of the cathode liquid storage chamber is fixed with a cathode flow channel communicating with the inside of the cathode liquid storage chamber, one side wall of the anode liquid storage chamber is fixed with an anode flow channel communicating with the inside of the anode liquid storage chamber, the cathode flow channel communicates with the anode flow channel, and a barrier filter film capable of exchanging water molecules and blocking hydrogen and oxygen is arranged between the cathode flow channel and the anode flow channel.

2. The gas-liquid separation and liquid storage balancing device for an anion exchange membrane water electrolyzer according to claim 1, characterized in that, The gas-liquid separation and liquid storage balancing device further comprises a first gas-liquid separator and a second gas-liquid separator, the anode electrolyte on the anion exchange membrane water electrolyzer is subjected to gas-liquid separation and filtration through the first gas-liquid separator and then flows back into the anode liquid storage chamber after filtration, and the cathode electrolyte on the anion exchange membrane water electrolyzer is subjected to gas-liquid separation and filtration through the second gas-liquid separator and then flows back into the cathode liquid storage chamber after filtration.

3. The gas-liquid separation and liquid storage balancing device for an anion exchange membrane water electrolyzer according to claim 2, characterized in that, The first gas-liquid separator and the second gas-liquid separator have the same structure, the first gas-liquid separator comprises a separation chamber and a filter assembly, the top end of the separation chamber is provided with a gas discharge port, the bottom end is provided with a liquid outlet, and the side wall is provided with a liquid return port, the filter assembly is installed in the separation chamber to filter the electrolyte flowing out through the liquid return port, the liquid return port of the first gas-liquid separator communicates with the anode electrolyte return port of the anion exchange membrane water electrolyzer, the liquid outlet of the first gas-liquid separator communicates with the anode liquid storage chamber to return the filtered anode electrolyte, the liquid return port of the second gas-liquid separator communicates with the cathode electrolyte return port of the anion exchange membrane water electrolyzer, and the liquid outlet of the second gas-liquid separator communicates with the cathode liquid storage chamber to return the filtered cathode electrolyte.

4. The gas-liquid separation and liquid storage balancing device for an anion exchange membrane water electrolyzer according to claim 3, characterized in that, The filter assembly comprises a supporting plate and a return filtration film, the supporting plate is fixed in the separation chamber below the liquid return port, a plurality of uniformly distributed liquid permeable holes are arranged on the supporting plate, and the return filtration film with hydrophilic alkali resistance is arranged on the supporting plate.

5. The gas-liquid separation and reservoir balancing device for an anion exchange membrane water electrolyzer according to claim 1, characterized in that, At least one annular sealing gasket is arranged between the cathode flow channel and the anode flow channel, and the barrier filter film is installed in the inner hole of the annular sealing gasket.

6. The gas-liquid separation and reservoir balancing device for an anion exchange membrane water electrolyzer according to claim 1, characterized in that, The barrier filter film is a PP film.

7. The gas-liquid separation and reservoir balancing device for an anion exchange membrane water electrolyzer according to claim 1, characterized in that, The cathode flow channel and the anode flow channel are docked and locked by a locking assembly.

8. The gas-liquid separation and liquid storage balancing device for an anion exchange membrane water electrolyzer according to claim 7, characterized in that, A first pressing plate extends outward from the outer peripheral wall of one end of the anode flow channel away from the anode liquid storage chamber, a second pressing plate extends outward from the outer peripheral wall of one end of the cathode flow channel away from the cathode liquid storage chamber, the locking assembly comprises an anode locking disc and a cathode locking disc, the anode locking disc is sleeved on the anode flow channel, the cathode locking disc is sleeved on the cathode flow channel, the anode locking disc and the cathode locking disc clamp the first pressing plate and the second pressing plate in the middle and are detachably fixedly connected by a first connecting piece.

9. The gas-liquid separation and reservoir balancing device for an anion exchange membrane water electrolyzer according to claim 8, characterized in that, The anode locking disc and the cathode locking disc are identical in structure, the anode locking disc comprises an upper locking disc and a lower locking disc, the upper locking disc and the lower locking disc are sleeved on the anode flow channel in a butt joint manner and are fixed by a second connecting piece, the axis of the second connecting piece is perpendicular to the center line of the anode flow channel, and the axis of the first connecting piece is parallel to the center line of the anode flow channel.

10. The gas-liquid separation and reservoir balancing device for an anion exchange membrane water electrolyzer according to claim 8, characterized in that, The surface of the anode locking disc and the cathode locking disc is coated with a polytetrafluoroethylene coating.

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