Guide plate net, electrolytic bath and hydrogen production system

Abstract

The invention discloses a guide plate net, an electrolytic tank and a hydrogen production system, and belongs to the technical field of electrolytic hydrogen production. An alkali liquor inlet and a gas outlet are formed in the two ends, in the first direction, of the flow guide plate net respectively, a first flow guide channel and a second flow guide channel are arranged on the flow guide plate net, the first flow guide channel is arranged along the edge of the outer contour of the flow guide plate net, and the second flow guide channel extends in the direction of the central axis of the flow guide plate net. The low-temperature electrolyte entering the alkali liquor inlet flows to the edge and the center of the flow guide plate net along a specific path under the shunting action of the first flow blocking net and the second flow blocking net, so that the temperature uniformity of the center and the edge is improved, and the situation that the temperature of the center is low and the temperature of the edge is too high due to the fact that the electrolyte directly flows to the center is prevented; the temperature of the area where the sealing ring is arranged at the edge is reduced, so that the sealing ring is prevented from losing efficacy due to overheating, the liquid leakage risk is reduced, and normal electrolytic reaction is prevented from being affected.

Description

Technical Field

[0001] This invention relates to the field of electrolytic hydrogen production technology, and in particular to a flow guide plate mesh, an electrolyzer, and a hydrogen production system. Background Technology

[0002] Hydrogen production via electrolysis is a process that uses water electrolysis to decompose water molecules and generate hydrogen and oxygen. The main structure of an electrolyzer is typically a plate-grid type. That is, a support mesh and other components are set on the main electrode plates to form electrode assemblies, and two electrode assemblies are separated by a diaphragm in the middle to form a reaction chamber.

[0003] In the prior art, when the electrolyte flows in the reaction chamber, it is decomposed by electrical energy to generate hydrogen and oxygen. As the reaction continues, the generated hydrogen and oxygen are discharged from the reaction chamber.

[0004] Traditional electrolytic cells often employ nipple-shaped bipolar plates, which are formed into protrusions and depressions on the bipolar plate through stamping technology. The nipples contact the nickel mesh catalyst, serving two purposes: supporting the catalyst and allowing electrical energy to be transferred to it. However, due to drawbacks such as high requirements for electrolytic cell assembly and positioning, high internal resistance, difficulty in achieving higher current densities, and complex manufacturing processes, planar bipolar plates are gradually replacing nipple-shaped bipolar plates.

[0005] Planar bipolar plates are simple to manufacture and offer high assembly efficiency for electrolytic cells. By incorporating an elastic support structure between the bipolar plate and the electrodes, the membrane-electrode distance within the electrolytic cell can be maximized, significantly increasing current density, reducing power consumption, and improving performance. However, with planar bipolar plates, the elimination of the nipple-shaped flow field results in low flow resistance from the elastic support structure after the electrolyte enters the electrolysis chamber. This leads to an unpredictable flow path for the electrolyte, causing a difference in flow velocity between the edges and the center. Consequently, temperature uniformity within the electrolysis chamber is poor, particularly at the center and edges. This can easily lead to overheating near the edge sealing ring due to slower flow velocity, potentially causing seal failure and leakage. Ultimately, this severely impacts the safe operation and lifespan of the electrolytic cell.

[0006] Therefore, there is an urgent need to design a flow guide plate, an electrolyzer, and a hydrogen production system to solve the above-mentioned technical problems. Summary of the Invention

[0007] The purpose of this invention is to propose a flow guide plate mesh, an electrolyzer, and a hydrogen production system, in which a flow guide channel is designed on the flow guide plate mesh to guide the electrolyte to flow along a specific path, effectively improving temperature uniformity and reducing the risk of leakage.

[0008] To achieve this objective, the present invention adopts the following technical solution: A flow guide plate mesh is disposed in an electrolytic cell. The flow guide plate mesh has an alkali inlet and a gas outlet at both ends along a first direction. The flow guide plate mesh is provided with flow channels, including a first flow channel and a second flow channel. The first flow channel is disposed along the outer contour edge of the flow guide plate mesh, and the second flow channel extends along the central axis of the flow guide plate mesh. One end of the first flow channel is connected to the alkali inlet and one end of the second flow channel, and the other end of the first flow channel is connected to the gas outlet and the other end of the second flow channel. This allows the electrolyte to flow in from the alkali inlet and simultaneously flow through the first and second flow channels, thereby being electrolyzed into gas and discharged from the gas outlet.

[0009] As an optional technical solution for the aforementioned guide vane mesh, the guide vane mesh includes: The plate mesh body has the alkali inlet and the gas outlet on it, and the outer periphery of the plate mesh body is surrounded by a sealing ring of the electrolytic cell chamber; and, A flow-blocking mesh is disposed on the main body of the plate mesh. The flow-blocking mesh includes a first flow-blocking mesh and a second flow-blocking mesh spaced apart along a second direction. The outer periphery of the first flow-blocking mesh and the sealing ring and the outer periphery of the second flow-blocking mesh and the sealing ring respectively form the first flow-guiding channel. The first flow-blocking mesh and the second flow-blocking mesh form the second flow-guiding channel. The first direction and the second direction are perpendicular to each other.

[0010] As an optional technical solution for the above-mentioned flow guide plate mesh, the first flow blocking mesh and the second flow blocking mesh are symmetrically arranged along the second direction.

[0011] As an optional technical solution for the aforementioned guide vane mesh, the guide vane mesh further includes: A flow guide net is provided on the main body of the net and distributed in the first flow guide channel and the second flow guide channel area. The flow guide net serves to guide and support the flow.

[0012] As an optional technical solution for the aforementioned flow guide plate mesh, the resistance coefficient of the flow obstruction mesh is greater than that of the flow guide plate mesh.

[0013] As an optional technical solution for the aforementioned flow guide mesh, the mesh density of the flow blocking mesh is greater than that of the flow guide mesh.

[0014] As an optional technical solution for the above-mentioned flow guide plate mesh, the main body of the plate mesh is circular, and both the first flow blocking mesh and the second flow blocking mesh are semi-circular.

[0015] As an optional technical solution of the above-mentioned guide plate mesh, the guide plate mesh is provided with two alkaline inlets at one end, the two alkaline inlets are symmetrically arranged on both sides along the second direction, the first guide channel is arranged in a one-to-one correspondence with the alkaline inlets, and the first direction and the second direction are perpendicular to each other.

[0016] The present invention also provides an electrolytic cell, including the above-described flow guide plate mesh.

[0017] The present invention also provides a hydrogen production system, including the electrolyzer described above.

[0018] Compared with the prior art, the beneficial effects of the present invention include at least the following: The guide plate mesh disclosed in this invention is disposed in an electrolytic cell. The guide plate mesh has an alkali inlet and a gas outlet at both ends along a first direction. The guide plate mesh is provided with guide channels, including a first guide channel and a second guide channel. The first guide channel is disposed along the outer contour edge of the guide plate mesh, and the second guide channel extends along the central axis of the guide plate mesh. One end of the first guide channel is connected to the alkali inlet and one end of the second guide channel, and the other end of the first guide channel is connected to the gas outlet and the other end of the second guide channel, so that the electrolyte flows in from the alkali inlet and flows through the first and second guide channels at the same time, and is then electrolyzed into gas and discharged from the gas outlet.

[0019] By setting an alkali inlet and a gas outlet on the flow guide plate mesh, and setting a first flow guide channel and a second flow guide channel, the first flow guide channel is set along the outer contour edge of the flow guide plate mesh, and the second flow guide channel extends along the central axis of the flow guide plate mesh. Under the above structure, the low-temperature electrolyte entering the alkali inlet flows to the edge and center of the flow guide plate mesh respectively along a specific path under the diversion effect of the first flow barrier and the second flow barrier. This helps to improve the temperature uniformity at the center and the edge, prevents the electrolyte from flowing directly to the center position, resulting in a low temperature at the center and an excessively high temperature at the edge, and reduces the temperature of the area where the sealing ring is arranged at the edge, thereby avoiding the sealing ring failure due to overheating, reducing the risk of leakage, and preventing the normal progress of the electrolysis reaction from being affected.

[0020] The electrolytic cell disclosed in this invention includes the aforementioned flow guide plate mesh. By setting the flow guide plate mesh, the flow of electrolyte is guided, thereby restricting the flow path of the electrolyte and allowing the electrolyte to flow simultaneously along the first and second flow guide channels. This helps to improve the temperature uniformity of the alkaline electrolytic cell, thereby enhancing its safety during use.

[0021] The hydrogen production system disclosed in this invention includes the aforementioned electrolyzer. This hydrogen production system boasts high safety and reliability in use. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the guide plate mesh provided in a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the electrolyte flow in the guide plate mesh provided in a specific embodiment of the present invention.

[0024] In the picture: 1. Alkali inlet; 2. First guide channel; 3. First flow barrier; 4. Second flow barrier; 5. Second guide channel; 6. Flow barrier; 7. Gas outlet. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] This embodiment provides a flow guide plate and an electrolytic cell. The electrolytic cell includes a flow guide plate. The flow guide plate is disposed inside the electrolytic cell. The flow guide plate has an alkali inlet 1 and a gas outlet 7 at both ends along a first direction X. The flow guide plate has flow channels, including a first flow channel 2 and a second flow channel 5. The first flow channel 2 is disposed along the outer contour edge of the flow guide plate, and the second flow channel 5 extends along the central axis of the flow guide plate. One end of the first flow channel 2 is connected to one end of the alkali inlet 1 and one end of the second flow channel 5, and the other end of the first flow channel 2 is connected to the gas outlet 7 and the other end of the second flow channel 5, so that the electrolyte flows in from the alkali inlet 1 and simultaneously flows through the first flow channel 2 and the second flow channel 5, and is then electrolyzed into gas and discharged from the gas outlet 7. It should be noted that the first direction X is... Figure 1 The X direction is shown.

[0032] By setting an alkali inlet 1 and a gas outlet 7 on the flow guide plate mesh, and setting a first flow guide channel 2 and a second flow guide channel 5, the first flow guide channel 2 is set along the outer contour edge of the flow guide plate mesh, and the second flow guide channel 5 is set along the central axis of the flow guide plate mesh. Under the above structure, the low-temperature electrolyte entering the alkali inlet 1 flows to the edge and center of the flow guide plate mesh respectively along a specific path under the diversion effect of the first flow barrier 3 and the second flow barrier 4. This helps to improve the temperature uniformity at the center and the edge, prevents the electrolyte from flowing directly to the center position, resulting in a low temperature at the center and an excessively high temperature at the edge, and reduces the temperature of the area where the sealing ring is arranged at the edge, thereby avoiding the sealing ring failure due to overheating, reducing the risk of leakage, and preventing the normal progress of the electrolysis reaction from being affected.

[0033] Specifically, the flow guide plate mesh includes a plate mesh body and a flow obstruction mesh. The plate mesh body is provided with an alkali inlet 1 and a gas outlet 7, and the outer periphery of the plate mesh body is surrounded by a sealing ring of the electrolytic cell chamber. The flow obstruction mesh is disposed on the plate mesh body and includes a first flow obstruction mesh 3 and a second flow obstruction mesh 4 spaced apart along the second direction Y. A first flow guide channel 2 is formed between the outer periphery of the first flow obstruction mesh 3 and the sealing ring, and a second flow guide channel 5 is formed between the first flow obstruction mesh 3 and the second flow obstruction mesh 4. The first direction X and the second direction Y are perpendicular. It should be noted that the second direction Y is... Figure 1 Y direction shown.

[0034] In this embodiment, the main body of the metal mesh is made of metal and has a flat mesh structure; the metal mesh is simple to process and has high structural strength. The aperture size and distribution density of the metal mesh can be designed according to actual conditions to meet the requirements of electrolyte flow.

[0035] The alkali inlet 1 and gas outlet 7 are located on the convex area of ​​the main body of the plate mesh. They are used to cooperate with the electrode plates or electrode frames to form the inlet and outlet of the reaction chamber for electrolyte flow. In other embodiments, grooves can be directly provided on the main body of the plate mesh as the first guide channel 2 and the second guide channel 5, or a U-shaped protrusion structure can be provided on the main body of the plate mesh, with the recessed part in the middle of the protrusion structure serving as the first guide channel 2 or the second guide channel 5. The mesh holes on the main body of the plate mesh can be arranged according to actual needs, but the mesh hole arrangement position must be different from the position of the first guide channel 2 and the second guide channel 5 to avoid affecting the flow.

[0036] Under the above structure, the electrolyte entering the alkaline inlet 1 flows along the first guide channel 2 and the second guide channel 5 simultaneously under the diversion effect of the first flow barrier 3 and the second flow barrier 4. When the electrolyte gradually flows upward along the first guide channel 2, it can directly contact the inner side of the sealing ring. Since the temperature of the alkaline electrolyte is relatively low, it can cool down the sealing ring, effectively prevent the sealing ring from overheating and failing, reduce the risk of leakage, and improve the safety and reliability of the electrolytic cell.

[0037] In this embodiment, a first flow-blocking mesh 3 and a second flow-blocking mesh 4 are provided on the main body of the mesh, and a sealing ring provided on the outer periphery of the flow-guiding mesh is used to jointly enclose and form a first flow-guiding channel 2 and a second flow-guiding channel 5. The structure is simple and easy to process. When the electrolyte flows, it can reduce the temperature of the sealing ring and improve the temperature uniformity at the center and edge of the flow-guiding mesh. In addition, when part of the electrolyte flows along the second flow-guiding channel 5, the first flow-blocking mesh 3 and the second flow-blocking mesh 4 force the electrolyte to flow in the second direction Y, that is, to flow and diffuse towards the first flow-guiding channels 2 on both sides. This promotes the diffusion of the electrolyte towards the two side edges of the mesh body, further improving the temperature uniformity of the middle area and the left and right side edge areas of the flow-guiding mesh, reducing the temperature of the high-temperature area, and preventing seal failure.

[0038] Furthermore, the first flow-blocking mesh 3 and the second flow-blocking mesh 4 are symmetrically arranged along the second direction Y. The main body 10 of the plate mesh has a first flow-guiding channel 2 on each side along the second direction Y, and the two first flow-guiding channels 2 are symmetrically arranged, meaning that the width and flow capacity of the two first flow-guiding channels 2 are the same. This helps to plan the flow path of the electrolyte and prevents a large temperature difference between the left and right parts of the flow-guiding plate mesh along the second direction Y, thus helping to ensure temperature uniformity.

[0039] In this embodiment, the flow guide plate also includes a flow guide net 6, and the flow guide net 6 is laid on all areas of the plate body where no flow obstruction net is provided.

[0040] The current-guiding mesh 6 is woven from filamentous material and has weaving gaps that allow the electrolyte to flow. The filamentous material of the current-guiding mesh 6 guides the electrolyte flow. The current-guiding mesh 6 can be processed by weaving the filamentous material to form a flat plate with weaving gaps. The aforementioned filamentous material can be, but is not limited to, nickel wire. In addition to its guiding function, the current-guiding mesh 6 also provides support.

[0041] Optionally, the resistance coefficient of the flow-blocking mesh is greater than that of the flow-guiding mesh 6. The flow resistance of the electrolyte in the flow-blocking mesh is greater than that in the flow-guiding mesh 6. This setting can force the electrolyte to flow along a preset path, thereby achieving a uniform temperature field distribution.

[0042] Alternatively, the mesh of the flow-blocking mesh and the flow-guiding mesh 6 can be a wavy mesh or a hexagonal honeycomb mesh. The mesh shape of the flow-blocking mesh and the mesh shape of the flow-guiding mesh 6 can be the same or different, depending on the actual situation.

[0043] In order to make the drag coefficient of the flow-blocking net greater than that of the flow-guiding net 6, the mesh density of the flow-blocking net is greater than that of the flow-guiding net 6.

[0044] The main body of the mesh can be rectangular or circular. (See reference...) Figure 1 In this embodiment, the electrolytic cell has a circular cross-section, the main body of the plate mesh is circular, and the first flow-blocking mesh 3 and the second flow-blocking mesh 4 are both semi-circular.

[0045] In this embodiment, the main body of the plate mesh extends along the first direction X. A gas outlet 7 is provided at the center of the top of the main body of the plate mesh. Two alkaline inlets 1 are spaced apart along the second direction Y at the bottom of the main body of the plate mesh. A first guide channel 2 is provided on both sides of the main body of the plate mesh along the second direction Y. The two alkaline inlets 1 are symmetrically arranged along both sides of the second direction Y, and the plate mesh is symmetrically arranged along both sides of the second direction Y, that is, the two first guide channels 2 are symmetrically arranged. The first guide channels 2 are arranged in a one-to-one correspondence with the alkaline inlets 1, and the two first guide channels 2 are respectively arranged along the outer contour edges of both sides of the guide plate mesh. By setting two alkaline inlets 1 and setting corresponding guide channels according to the alkaline inlets 1, the electrolyte flowing in from the two alkaline inlets 1 can flow to the corresponding guide channels, that is, flow through the first guide channels 2. Setting the two first guide channels 2 along the outer contour edges of both sides of the guide plate mesh helps to ensure the uniformity of the temperature on both sides of the guide plate mesh.

[0046] Because the two sides of the plate mesh body are flat and lack protruding structures, if there are no effective flow guides on both sides of the plate mesh body, the electrolyte flows directly from the alkaline inlet 1 to the flow field area of ​​the plate mesh body along the first direction X to the gas outlet 7. It will not diffuse along the second direction Y, which is perpendicular to the first direction X. This results in more alkaline solution and a faster flow rate in the middle of the plate mesh body, while less alkaline solution and a slower flow rate are found at the two edges of the plate mesh body. This causes uneven alkaline solution flow rate and uneven temperature distribution, especially at the edge positions where the sealing rings are prone to overheating and failure.

[0047] This embodiment sets a first flow-blocking mesh 3, a second flow-blocking mesh 4, and a flow-guiding mesh 6 on the plate mesh body to reasonably guide the flow of electrolyte, thereby achieving the guiding effect of electrolyte. This not only makes the electrolyte flow rate uniform but also improves the uniformity of temperature distribution.

[0048] On the other hand, this embodiment also provides an electrolytic cell, including the aforementioned flow guide plate mesh. The electrolytic cell is an alkaline electrolytic cell, and the electrolyte is an alkaline electrolyte. The aforementioned flow guide plate mesh can effectively distribute the electrolyte, making the electrolyte evenly distributed on the bipolar plates, improving the temperature uniformity and flow rate consistency between the two edges and the middle of the electrolysis chamber. Therefore, the internal temperature of the electrolytic cell in this embodiment is uniform, and it is less likely to cause local overheating due to slow flow rate, thus ensuring safe operation. The derivation process of the beneficial effects of the electrolytic cell in this embodiment is largely similar to the derivation process of the beneficial effects of the aforementioned flow guide plate mesh, so it will not be repeated here.

[0049] Furthermore, this embodiment also provides a hydrogen production system, including the aforementioned flow guide plate or electrolyzer. It possesses all the advantages of the aforementioned flow guide plate or electrolyzer, which will not be repeated here. The derivation process of the beneficial effects of the hydrogen production system in this embodiment is largely similar to the derivation process of the beneficial effects of the aforementioned flow guide plate or electrolyzer, and therefore will not be repeated here.

[0050] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

[0051] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A flow guide plate mesh, characterized in that, The flow guide plate is installed inside the electrolytic cell. The flow guide plate has an alkali inlet (1) and a gas outlet (7) at both ends along the first direction. The flow guide plate is provided with a flow channel, which includes a first flow channel (2) and a second flow channel (5). The first flow channel (2) is provided along the outer contour edge of the flow guide plate, and the second flow channel (5) extends along the central axis of the flow guide plate. One end of the first flow channel (2) is connected to one end of the alkali inlet (1) and the second flow channel (5), and the other end of the first flow channel (2) is connected to the other end of the gas outlet (7) and the second flow channel (5), so that the electrolyte flows in from the alkali inlet (1) and flows through the first flow channel (2) and the second flow channel (5) at the same time, and is then electrolyzed into gas and discharged from the gas outlet (7).

2. The guide plate mesh according to claim 1, characterized in that, The guide plate mesh includes: The plate mesh body is provided with the alkaline solution inlet (1) and the gas outlet (7), and the outer periphery of the plate mesh body is surrounded by the sealing ring of the electrolytic cell chamber; and, A flow-blocking mesh is disposed on the main body of the plate mesh. The flow-blocking mesh includes a first flow-blocking mesh (3) and a second flow-blocking mesh (4) spaced apart along a second direction. The outer periphery of the first flow-blocking mesh (3) and the sealing ring, and the outer periphery of the second flow-blocking mesh (4) and the sealing ring respectively form the first flow-guiding channel (2). The first flow-blocking mesh (3) and the second flow-blocking mesh (4) form the second flow-guiding channel (5). The first direction and the second direction are perpendicular to each other.

3. The guide plate mesh according to claim 2, characterized in that, The first flow-blocking mesh (3) and the second flow-blocking mesh (4) are symmetrically arranged along the second direction.

4. The guide plate mesh according to claim 2, characterized in that, The flow guide plate mesh also includes: The guide net (6) is disposed on the main body of the plate net. The guide net (6) is distributed in the areas of the first guide channel (2) and the second guide channel (5). The guide net (6) plays the role of guiding and supporting.

5. The guide plate mesh according to claim 4, characterized in that, The resistance coefficient of the flow-blocking mesh is greater than that of the flow-guiding plate mesh (6).

6. The guide plate mesh according to claim 5, characterized in that, The mesh density of the flow-blocking mesh is greater than that of the flow-guiding mesh (6).

7. The guide plate mesh according to claim 2, characterized in that, The main body of the plate mesh is circular, and the first flow-blocking mesh (3) and the second flow-blocking mesh (4) are both semi-circular.

8. The guide plate mesh according to any one of claims 1-7, characterized in that, Two alkaline inlets (1) are spaced apart at one end of the flow guide plate mesh. The two alkaline inlets (1) are symmetrically arranged on both sides along the second direction. The first flow guide channel (2) is arranged in a one-to-one correspondence with the alkaline inlets (1). The first direction and the second direction are perpendicular to each other.

9. An electrolytic cell, characterized in that, Includes the flow guide plate mesh as described in any one of claims 1-8.

10. A hydrogen production system, characterized in that, Includes the electrolytic cell as described in claim 9.

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