Non-metal pole frame suitable for non-metal square normal-pressure alkaline water electrolytic bath

Abstract

The invention provides a non-metal pole frame suitable for a non-metal square normal-pressure alkaline water electrolytic bath, and relates to the technical field of electrolytic baths, the non-metal pole frame comprises a pole frame main body and an assembly auxiliary part; a cathode liquid outlet main flow channel, a cathode liquid outlet channel, a cathode liquid inlet main flow channel, a cathode liquid inlet channel, an anode liquid outlet main flow channel, an anode liquid outlet channel, an anode liquid inlet main flow channel and an anode liquid inlet channel are arranged in the electrode frame main body; the assembling auxiliary part comprises a first connecting part, a second connecting part and an adjusting rod, a moving plate is welded to the side of the second connecting part, the moving plate is inserted into the first connecting part, the adjusting rod is inserted into a through hole formed in the middle of the moving plate, and the outer end face of the adjusting rod is sleeved with a locking pipe. The assembling auxiliary part can be used for flexibly adjusting the assembling number of the pole frame main bodies, meanwhile, the pressure borne by the pole frame main bodies can be increased, it is ensured that the pole frame main bodies cannot deform under normal pressure, and the problems that the pole frame is prone to deformation due to pressure or assembling stress, sealing performance is affected, and stacking and assembling are difficult are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolytic cells, and in particular to a non-metallic electrode frame suitable for a non-metallic square atmospheric-pressure alkaline water electrolytic cell. Background Art

[0002] An electrolytic cell is the core equipment of an electrochemical reaction, and its performance directly affects the electrolysis efficiency, energy consumption and equipment life. It is applicable to fields such as electrolytic water hydrogen production, chlor-alkali industry and electrochemical synthesis. Most traditional electrolytic cell electrode frames are made of metal materials. Although they have good electrical conductivity and mechanical strength, there are corrosion problems: metal materials are easily corroded in acidic or alkaline electrolytes, and the corrosion resistance needs to be enhanced through transition metal or noble metal coatings, resulting in high costs; problems of heavy weight and high cost: the high density of the metal electrode frame makes the equipment bulky and difficult to transport and install; the noble metal coating process is complex, further increasing the manufacturing cost; problems of insufficient sealing: the large difference in the thermal expansion coefficients between the metal and the sealing material is likely to cause leakage during temperature fluctuations.

[0003] In recent years, in order to solve the above defects of the metal electrode frame, non-metallic materials (such as engineering plastics, composite materials) have gradually been tried for the electrolytic cell structure, but the existing non-metallic electrode frames have several defects: under atmospheric pressure conditions, the electrode frame is easily deformed due to internal pressure or assembly stress, affecting the sealing performance; in terms of modular design, most of the existing electrode frames are circular or irregular in shape, and it is difficult to achieve a compact square stacking design, restricting the large-scale expansion of the electrolytic cell. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a non-metallic electrode frame suitable for a non-metallic square atmospheric-pressure alkaline water electrolytic cell to solve the problems that the non-metallic electrode frame is easily deformed under atmospheric pressure, affecting the sealing performance, and it is difficult to achieve modular design to meet stacking and assembly.

[0006] The present invention provides a non-metallic square electrode frame with corrosion resistance, light weight and high sealing performance, solving the defects of high cost and easy corrosion of the traditional metal electrode frame, as well as the problems of insufficient structural strength and difficulty in achieving stacking and assembly of the existing non-metallic electrode frames.

[0007] In the first aspect of the present disclosure, a non-metallic electrode frame applicable to a non-metallic square atmospheric-pressure alkaline water electrolyzer is provided, specifically including: an electrode frame main body and an assembly auxiliary; the electrode frame main body is made of a corrosion-resistant non-metallic material, with the cathode of the electrode frame main body facing upward and the anode facing downward. Inside the electrode frame main body, there are a cathode liquid outlet main channel, a cathode liquid outlet channel, a cathode liquid inlet main channel, a cathode liquid inlet channel, an anode liquid outlet main channel, an anode liquid outlet channel, an anode liquid inlet main channel, and an anode liquid inlet channel. On the left and right sides of the electrode frame main body, there are electrode frame fixing blocks. A sealing groove is provided on the side surface of the electrode frame main body, and a positioning step is provided along the upper edge of the inner side of the electrode frame main body; the assembly auxiliary includes a first connecting member, a second connecting member, and an adjusting rod. A moving plate is welded beside the second connecting member. The moving plate is inserted into the first connecting member, and the adjusting rod is inserted into a through hole opened in the middle of the moving plate. A locking tube is sleeved on the outer end surface of the adjusting rod.

[0008] In at least some embodiments, the cross-sectional shape of the sealing groove is rectangular, and the cross-sectional shape of the sealing groove can also be replaced by one of a trapezoid, a circle, or an arc. Five regions, namely a cathode liquid outlet main channel region, a cathode liquid inlet main channel region, an anode liquid outlet main channel region, a cathode liquid outlet main channel region, and a reaction region, are formed through the sealing groove. The sealing material can be selected from materials resistant to alkali and high temperature. Internal fixing holes are evenly distributed on the positioning step.

[0009] In at least some embodiments, the gas-liquid mixture generated in the cathode reaction region flows through the cathode liquid outlet channel to the cathode liquid outlet main channel and finally converges outside the electrolysis device. The cathode liquid outlet channel is a circular through hole provided on the inner wall of the cathode liquid inlet main channel through hole, with the hole direction perpendicular to the thickness direction of the electrode frame main body and communicating with the cathode reaction region. The gas-liquid mixture generated in the anode reaction region flows through the anode liquid outlet channel to the anode liquid outlet main channel and finally converges outside the electrolysis device. The anode liquid outlet channel is a circular through hole provided on the inner wall of the anode liquid outlet main channel through hole, with the hole direction perpendicular to the thickness direction of the electrode frame main body and communicating with the anode reaction region.

[0010] In at least some embodiments, adjacent two of the electrode frame fixing blocks are fixedly connected through the assembly auxiliary to form an integrated module in pairs, supporting the rapid stacking and assembly of multiple electrode frame main bodies. The interface is internally provided with a diversion channel to ensure uniform distribution of the electrolyte. A toothed plate is provided on the upper wall of the through hole of the moving plate, and two toothed plates are provided on the lower wall. The upper toothed plate is aligned with the toothed plate on the outer side of the lower wall. A circular plate is welded to the inner end surface of the adjusting rod. A gear is provided on the adjusting rod, and the gear meshes with the toothed plate. A threaded rod is provided at the outer end of the adjusting rod. The inner wall of the locking tube is provided with a thread groove and is threadedly connected with the threaded rod. The inner end of the locking tube is clamped in a circular groove opened on the outer end surface of the first connecting member, and a rotating plate is welded to the outer end of the locking tube.

[0011] In at least some embodiments, the cathode inlet main channel and the anode inlet main channel are arranged on the lower inner side of the bipolar plate body, and both the cathode inlet main channel and the anode inlet main channel are circular through-holes in a parallel array. The axial direction of the through-holes is parallel to the thickness direction of the bipolar plate body. The cathode outlet main channel and the anode outlet main channel are arranged on the upper edge of the bipolar plate body. The cathode outlet main channel is a circular through-hole in a parallel array, and the axial direction of the through-hole is parallel to the thickness direction of the bipolar plate body. The anode outlet main channel is a square through-hole in a parallel array, and the through direction of the through-hole is parallel to the thickness direction of the bipolar plate body.

[0012] In at least some embodiments, the gas-liquid mixture generated in the cathode reaction region flows through the cathode outlet channel to the cathode outlet main channel and is finally collected outside the electrolysis device. The cathode outlet channel is a circular through-hole with a hole direction perpendicular to the thickness direction of the bipolar plate body and communicating with the cathode reaction region on the inner wall of the cathode inlet main channel through-hole. The circular through-hole can be one of a square, an ellipse, and a special shape. The gas-liquid mixture generated in the anode reaction region flows through the anode outlet channel to the anode outlet main channel and is finally collected outside the electrolysis device. The anode outlet channel is a circular through-hole with a hole direction perpendicular to the thickness direction of the bipolar plate body and communicating with the anode reaction region on the inner wall of the anode outlet main channel through-hole.

[0013] In at least some embodiments, the cathode inlet main channel supplies the reaction electrolyte to the cathode reaction region through the cathode inlet channel. The cathode inlet channel is a circular through-hole with a hole perpendicular to the thickness direction of the bipolar plate body and communicating with the cathode reaction region on the inner wall of the cathode outlet main channel through-hole. The cross-section of the circular through-hole can be one of a square, an ellipse, and a special shape. The anode inlet main channel supplies the reaction electrolyte to the anode reaction region through the anode inlet channel. The anode inlet channel is a circular through-hole with a hole perpendicular to the thickness direction of the bipolar plate body and communicating with the anode reaction region on the inner wall of the anode outlet main channel through-hole. The cross-section of the circular through-hole can be one of a square, an ellipse, and a special shape.

[0014] In at least some embodiments, the overall structure of the bipolar plate body is a square structure frame with arc transitions at the four corners. The overall thickness of the bipolar plate body is 40 - 80 mm, the length is 2 - 2.5 m, and the width is 1 - 1.5 m. The length of the reaction region is 1.8 - 2.3 m, and the width is 0.8 - 1.3 m. The thickness direction of the bipolar plate body includes a cathode reaction region and an anode reaction region, and the size of the anode reaction region is smaller than that of the cathode reaction region. The two reaction regions are isolated by a bipolar plate and a diaphragm assembly installed through a positioning step.

[0015] The present invention provides a non-metallic bipolar plate applicable to a non-metallic square atmospheric pressure alkaline water electrolyzer, having the following beneficial effects:

[0016] When the present invention is in use, an assembly auxiliary can be used to flexibly adjust the number of assembled bipolar plate bodies, and at the same time, the pressure borne by the bipolar plate bodies can be increased to ensure that the bipolar plate bodies will not deform under normal pressure.

[0017] In addition, through the design of the sealing groove, the sealing performance of the bipolar plate body can be improved. The non-metal design can reduce the self-weight of the bipolar plate body, and the square design can meet the stacking of multiple bipolar plate bodies, improving the large-scale expansion of the electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0019] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0020] In the drawings:

[0021] Figure 1 A front structural schematic diagram of the bipolar plate body of the present application with the cathode facing upward is shown;

[0022] Figure 2 A structural schematic diagram of the cathode liquid outlet main flow channel of the present application is shown;

[0023] Figure 3 The present application is shown Figure 2 A cross-sectional schematic diagram of A-A in the present application;

[0024] Figure 4 A structural schematic diagram of the locking member of the present application is shown;

[0025] Figure 5 The present application is shown Figure 2 A cross-sectional schematic diagram of B-B in the present application;

[0026] Figure 6 The present application is shown Figure 5 An enlarged structural schematic diagram of II in the present application;

[0027] Figure 7 The present application is shown Figure 2 A cross-sectional schematic diagram of J-J and D-D in the present application;

[0028] Figure 8 The present application is shown Figure 1 An enlarged structural schematic diagram of III in the present application;

[0029] Figure 9 The present application is shown Figure 8 A cross-sectional schematic diagram of E-E in the present application;

[0030] Figure 10 The present application is shown Figure 8Schematic cross-sectional view of M-M in the middle;

[0031] Figure 11 Shows the present application Figure 8 Schematic cross-sectional view of N-N in the middle;

[0032] Figure 12 Shows the structural schematic diagram of the bipolar frame sealing solution of the present application;

[0033] Figure 13 Shows the structural schematic diagram of the anodic liquid inlet channel of the present application;

[0034] Figure 14 Shows the structural schematic diagram of the cathodic liquid outlet channel of the present application;

[0035] Figure 15 Shows the structural schematic diagram of the bipolar frame fixing block of the present application;

[0036] Figure 16 Shows the structural schematic diagram of the sealing groove of the present application;

[0037] Figure 17 Shows the installation structural schematic diagram of the assembly auxiliary of the present application;

[0038] Figure 18 Shows the unfolded structural schematic diagram of the assembly auxiliary of the present application.

[0039] List of reference numerals

[0040] 101, Main cathodic liquid outlet channel; 102, Cathodic liquid outlet channel; 103, Main cathodic liquid inlet channel; 104, Cathodic liquid inlet channel;

[0041] 201, Main anodic liquid outlet channel; 202, Anodic liquid outlet channel; 203, Main anodic liquid inlet channel; 204, Anodic liquid inlet channel;

[0042] 301, Internal fixing hole; 302, Sealing groove; 303, Bipolar frame fixing block; 304, Positioning step;

[0043] 401, First connecting piece; 402, Second connecting piece; 4021, Moving plate; 403, Locking tube; 404, Adjusting rod; 4041, Threaded rod. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0045] Example 1: Please refer to the attached Figure 1 to the attached Figure 16 :

[0046] The present invention provides a non-metallic electrode frame applicable to a non-metallic square atmospheric-pressure alkaline water electrolyzer, comprising: an electrode frame main body and an assembly auxiliary; the electrode frame main body is made of a corrosion-resistant non-metallic material, with the cathode of the electrode frame main body facing upward and the anode facing downward. Inside the electrode frame main body, there are provided a cathode liquid outlet main channel 101, a cathode liquid outlet channel 102, a cathode liquid inlet main channel 103, a cathode liquid inlet channel 104, an anode liquid outlet main channel 201, an anode liquid outlet channel 202, an anode liquid inlet main channel 203, and an anode liquid inlet channel 204. On the left and right sides of the electrode frame main body, there are provided electrode frame fixing blocks 303. On the side of the electrode frame main body, there is provided a sealing groove 302, and on the inner upper edge of the electrode frame main body, there is provided a positioning step 304; the assembly auxiliary includes a first connecting member 401, a second connecting member 402, and an adjusting rod 404. A moving plate 4021 is welded beside the second connecting member 402. The moving plate 4021 is inserted into the first connecting member 401. The adjusting rod 404 is inserted into a through hole formed in the middle of the moving plate 4021, and a locking tube 403 is sleeved on the outer end face of the adjusting rod 404.

[0047] In the embodiment of the present disclosure, as shown in the attached Figure 1 , the cathode liquid inlet main channel 103 and the anode liquid inlet main channel 203 are arranged on the lower side inside the electrode frame main body, and both the cathode liquid inlet main channel 103 and the anode liquid inlet main channel 203 are circular through holes in a parallel array. The axis direction of the through holes is parallel to the thickness direction of the electrode frame main body. The cathode liquid outlet main channel 101 and the anode liquid outlet main channel 201 are arranged on the upper edge of the electrode frame main body. The cathode liquid outlet main channel 101 is an elliptical through hole in a parallel array. The axis direction of the through holes is parallel to the thickness direction of the electrode frame main body, while the anode liquid outlet main channel 201 is a square through hole in a parallel array. The through direction of the through holes is parallel to the thickness direction of the electrode frame main body.

[0048] In the embodiment of the present disclosure, as shown in the attached Figure 1 , the overall structure of the electrode frame main body is a square structure frame with arc transitions at the four corners. The overall thickness of the electrode frame main body is 40 - 80 mm, the length is 2 - 2.5 m, and the width is 1 - 1.5 m. Among them, the length of the reaction area is 1.8 - 2.3 m, and the width is 0.8 - 1.3 m. The thickness direction of the electrode frame main body includes a cathode reaction area and an anode reaction area, and the size of the anode reaction area is smaller than that of the cathode reaction area. The two reaction areas are isolated by a bipolar plate and a diaphragm assembly installed through the positioning step 304.

[0049] In the embodiment of the present disclosure, as shown in the attached Figure 4 , attached Figure 7 and attached Figure 8As shown, the cathode inlet main channel 103 supplies the reaction electrolyte to the cathode reaction area through the cathode inlet channel 102. The cathode inlet channel 102 is a hole provided on the inner wall of the through-hole of the cathode outlet main channel 101 and perpendicular to the thickness direction of the bipolar plate body, and the hole communicates with the circular through-hole of the cathode reaction area. The cross-section of the circular through-hole can be one of a square, an ellipse, or a special shape. The anode inlet main channel 203 supplies the reaction electrolyte to the anode reaction area through the anode inlet channel 202. The anode inlet channel 202 is a hole provided on the inner wall of the through-hole of the anode outlet main channel 201 and perpendicular to the thickness direction of the bipolar plate body, and the hole communicates with the circular through-hole of the anode reaction area. The cross-section of the circular through-hole can be one of a square, an ellipse, or a special shape.

[0050] In the embodiments of the present disclosure, as shown in the attached Figures 8 - 11 figure, the through-hole shapes of the cathode inlet main channel 103, the anode inlet main channel 203, the cathode outlet main channel 101, and the anode outlet main channel 201 can be one of a circle, a square, an ellipse, or a special shape.

[0051] In the embodiments of the present disclosure, as shown in the attached Figure 5 and the attached Figure 6 figure, the cross-sectional shape of the sealing groove 302 is a rectangle, and the cross-sectional shape of the sealing groove 302 can also be replaced with one of a trapezoid, a circle, or an arc. Five regions, namely the cathode outlet main channel area, the cathode inlet main channel area, the anode outlet main channel area, the cathode outlet main channel area, and the reaction area, are formed through the sealing groove 302. The sealing material can be selected from materials resistant to alkali and high temperature, including but not limited to reinforced fluororubber, glass fiber-reinforced polyphenylene sulfide, polytetrafluoroethylene, etc.

[0052] In the embodiments of the present disclosure, as shown in the attached Figure 13 and the attached Figure 14 figure, the gas-liquid mixture generated in the cathode reaction area flows through the cathode outlet channel 104 to the cathode outlet main channel 101 and finally converges outside the electrolysis device. The cathode outlet channel 104 is a hole provided on the inner wall of the through-hole of the cathode inlet main channel 103, with the hole direction perpendicular to the thickness direction of the bipolar plate body and communicating with the circular through-hole of the cathode reaction area. The circular through-hole can be one of a square, an ellipse, or a special shape. The gas-liquid mixture generated in the anode reaction area flows through the anode outlet channel 204 to the anode outlet main channel 201 and finally converges outside the electrolysis device. The anode outlet channel 204 is a hole provided on the inner wall of the through-hole of the anode outlet main channel 201, with the hole direction perpendicular to the thickness direction of the bipolar plate body and communicating with the circular through-hole of the anode reaction area. The circular through-hole can be one of a square, an ellipse, or a special shape.

[0053] In the embodiments of the present disclosure, as shown in the attached Figure 15As shown, internal fixing holes 301 are evenly distributed on the positioning step 304. Components such as buckles, rivets, and bolts can pass through the internal fixing holes 301 to complete the fixed assembly between the main body of the bipolar plate frame and the bipolar plate.

[0054] As Figures 17 - 18 shown, in the second embodiment, on the basis of the first embodiment, adjacent two of the bipolar plate frame fixing blocks 303 are fixedly connected through an assembly auxiliary part to form an integrated module in groups of two, supporting the rapid stacking and assembly of multiple main bodies of the bipolar plate frame. The interface is internally provided with a diversion channel to ensure the uniform distribution of the electrolyte. A toothed plate is arranged on the upper wall of the through hole of the moving plate 4021, and two toothed plates are arranged on the lower wall. The upper toothed plate is aligned with the toothed plate on the outer side of the lower wall. A circular plate is welded to the inner end face of the adjusting rod 404. A gear is arranged on the adjusting rod 404, and the gear meshes with the toothed plate. A threaded rod 4041 is arranged at the outer end of the adjusting rod 404. A thread groove is opened on the inner wall of the locking tube 403 and is threadedly connected with the threaded rod 4041. The inner end of the locking tube 403 is clamped in a circular groove opened on the outer end face of the first connecting part 401, and a rotating plate is welded to the outer end of the locking tube 403. After rotating the rotating plate, the locking tube 403 is driven to rotate. After the inner end of the locking tube 403 disengages from the first connecting part 401, pulling the rotating plate drives the adjusting rod 404 to move through the locking tube 403, so that the gear disengages from the upper toothed plate and meshes with the lower inner toothed plate. Then, rotating the rotating plate can drive the adjusting rod 404 to rotate to adjust the position of the moving plate 4021. After determining the adjustment position according to the number of main bodies of the bipolar plate frame to be assembled and fixed, reverse operation is performed to achieve locking.

[0055] The working principle of this embodiment: After placing the main body of the bipolar plate frame, the bipolar plate, and the diaphragm in sequence for assembly, rotating the rotating plate drives the adjusting rod 404 to rotate through the locking tube 403 until the first connecting part 401 and the second connecting part 402 clamp all the main bodies of the bipolar plate frame. Then, pulling the rotating plate makes the circular plate at the inner end of the adjusting rod 404 clamped onto the first connecting part 401 until the inner end face of the circular plate is flush with the inner end face of the first connecting part 401. At this time, the gear is clamped onto the upper and lower toothed plates, making the adjusting rod 404 unable to rotate. Finally, rotating the rotating plate until the inner end of the locking tube 403 is clamped into the circular groove opened on the outer end face of the first connecting part 401 to complete the assembly of the main body of the bipolar plate frame.

[0056] It should be noted that the main body of the bipolar plate frame in this application is made of plastic material, and can also be made of concrete by molding through a mold, or can also be made of materials such as ceramics that have both hardness and plasticity. Its performance is the same as or even better than that described in the present invention, and all should be within the protection scope of this application.

Claims

1. A non-metallic electrode frame applicable to a non-metallic square atmospheric pressure alkaline water electrolyzer, characterized in that, Including: A bipolar plate main body and an assembly auxiliary part; the bipolar plate main body is made of a corrosion-resistant non-metallic material, with the cathode of the bipolar plate main body facing upwards and the anode facing downwards. Inside the bipolar plate main body, there are a cathode liquid outlet main channel (101), a cathode liquid outlet channel (102), a cathode liquid inlet main channel (103), a cathode liquid inlet channel (104), an anode liquid outlet main channel (201), an anode liquid outlet channel (202), an anode liquid inlet main channel (203), and an anode liquid inlet channel (204). On the left and right sides of the bipolar plate main body, there are bipolar plate fixing blocks (303). On the side of the bipolar plate main body, there is a sealing groove (302), and on the inner upper edge of the bipolar plate main body, there is a positioning step (304); the assembly auxiliary part includes a first connecting piece (401), a second connecting piece (402), and an adjusting rod (404). A moving plate (4021) is welded beside the second connecting piece (402). The moving plate (4021) is inserted into the first connecting piece (401). The adjusting rod (404) is inserted into a through hole formed in the middle of the moving plate (4021), and a locking tube (403) is sleeved on the outer end face of the adjusting rod (404).

2. The non-metallic electrode frame applicable to a non-metallic square atmospheric-pressure alkaline water electrolyzer according to claim 1, characterized in that, The overall structure of the bipolar plate main body is a square structural frame with arc transitions at the four corners. The overall thickness of the bipolar plate main body is 40 - 80 mm, the length is 2 - 2.5 m, and the width is 1 - 1.5 m. Among them, the length of the reaction area is 1.8 - 2.3 m, and the width is 0.8 - 1.3 m. The thickness direction of the bipolar plate main body includes a cathode reaction area and an anode reaction area, and the size of the anode reaction area is smaller than that of the cathode reaction area. The two reaction areas are isolated by a bipolar plate and a diaphragm assembly installed through the positioning step (304).

3. The non-metallic electrode frame applicable to a non-metallic square atmospheric pressure alkaline water electrolyzer according to claim 2, wherein, The cathode liquid inlet main channel (103) and the anode liquid inlet main channel (203) are arranged on the lower side inside the bipolar plate main body, and both the cathode liquid inlet main channel (103) and the anode liquid inlet main channel (203) are circular through holes in a parallel array. The axis direction of the through holes is parallel to the thickness direction of the bipolar plate main body. The cathode liquid outlet main channel (101) and the anode liquid outlet main channel (201) are arranged on the upper edge of the bipolar plate main body. The cathode liquid outlet main channel (101) is an elliptical through hole in a parallel array, and the axis direction of the through holes is parallel to the thickness direction of the bipolar plate main body. While the anode liquid outlet main channel (201) is a square through hole in a parallel array, and the through direction of the through holes is parallel to the thickness direction of the bipolar plate main body.

4. The non-metallic bipolar plate for a non-metallic square atmospheric pressure alkaline water electrolyzer according to claim 1, characterized in that, The cross-sectional shape of the sealing groove (302) is rectangular, and through the sealing groove (302), five major areas are formed, namely a cathode liquid outlet main channel area, a cathode liquid inlet main channel area, an anode liquid outlet main channel area, a cathode liquid outlet main channel area, and a reaction area.

5. The non-metallic electrode frame applicable to a non-metallic square atmospheric pressure alkaline water electrolyzer according to claim 1, characterized in that, Internal fixing holes (301) are evenly distributed on the positioning step (304).

6. The non-metallic electrode frame applicable to a non-metallic square atmospheric-pressure alkaline water electrolyzer according to claim 3, wherein The cathode liquid inlet main channel (103) supplies reaction electrolyte to the cathode reaction area through the cathode liquid inlet channel (102). The cathode liquid inlet channel (102) is a hole perpendicular to the thickness direction of the bipolar plate main body provided on the inner wall of the through hole of the cathode liquid outlet main channel (101), and the hole communicates with a circular through hole in the cathode reaction area.

7. A non-metallic bipolar plate for a non-metallic square atmospheric pressure alkaline water electrolyzer according to claim 3, characterized in that, The anode inlet main flow channel (203) supplies reaction electrolyte to the anode reaction area through the anode inlet channel (202). The anode inlet channel (202) is a hole provided on the inner wall of the through hole of the anode outlet main flow channel (201) and perpendicular to the thickness direction of the bipolar plate body, and the hole communicates with the circular through hole of the anode reaction area.

8. The non-metallic electrode frame applicable to a non-metallic square atmospheric-pressure alkaline water electrolyzer according to claim 1, characterized in that, The gas-liquid mixture generated in the cathode reaction area flows through the cathode outlet channel (104) to the cathode outlet main flow channel (101) and is finally collected outside the electrolysis device. The cathode outlet channel (104) is a circular through hole provided on the inner wall of the through hole of the cathode inlet main flow channel (103) with the hole direction perpendicular to the thickness direction of the bipolar plate body and communicating with the cathode reaction area.

9. The non-metallic electrode frame applicable to a non-metallic square atmospheric-pressure alkaline water electrolyzer according to claim 1, wherein, The gas-liquid mixture generated in the anode reaction area flows through the anode outlet channel (204) to the anode outlet main flow channel (201) and is finally collected outside the electrolysis device. The anode outlet channel (204) is a circular through hole provided on the inner wall of the through hole of the anode outlet main flow channel (201) with the hole direction perpendicular to the thickness direction of the bipolar plate body and communicating with the anode reaction area.

10. A non-metallic electrode frame applicable to a non-metallic square atmospheric pressure alkaline water electrolyzer according to claim 1, characterized in that, The adjacent two of the bipolar plate fixing blocks (303) are fixedly connected through an assembly auxiliary. A toothed plate is provided on the upper wall of the through hole of the moving plate (4021), and two toothed plates are provided on the lower wall. The upper toothed plate is aligned with the toothed plate on the outer side of the lower wall. A circular plate is welded to the inner end face of the adjusting rod (404). A gear is provided on the adjusting rod (404), and the gear meshes with the toothed plate. A threaded rod (4041) is provided at the outer end of the adjusting rod (404). A thread groove is provided on the inner wall of the locking tube (403) and is threadedly connected to the threaded rod (4041). The inner end of the locking tube (403) is clamped in the circular groove provided on the outer end face of the first connecting member (401), and a rotating plate is welded to the outer end of the locking tube (403).

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