A nonmetallic polar frame suitable for nonmetallic square atmospheric caustic soda electrolytic cell

Abstract

The application provides a non-metallic polar frame suitable for a non-metallic square normal-pressure caustic soda electrolytic cell, relates to the technical field of electrolytic cells, and comprises a polar frame body and an assembly auxiliary part; the interior of the polar frame body is provided with a cathode liquid outlet main flow channel, a cathode liquid outlet passage, a cathode liquid inlet main flow channel, a cathode liquid inlet passage, an anode liquid outlet main flow channel, an anode liquid outlet passage, an anode liquid inlet main flow channel and an anode liquid inlet passage; the assembly auxiliary part comprises a first connecting piece, a second connecting piece and an adjusting rod, a moving plate is welded on the side of the second connecting piece, the moving plate is inserted into the interior of the first connecting piece, the adjusting rod is inserted into the through hole formed in the middle of the moving plate, and the outer end surface of the adjusting rod is sleeved with a locking pipe. The assembly auxiliary part can flexibly adjust the assembly quantity of the polar frame body, can increase the pressure borne by the polar frame body, can ensure that the polar frame body will not be deformed under normal pressure, and can solve the problems that the polar frame is easy to be deformed due to pressure or assembly stress, the sealing property is affected, and it is difficult to stack and assemble.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrolytic cell, and particularly relates to a non-metallic polar frame suitable for a non-metallic square normal-pressure alkali water electrolytic cell. BACKGROUND

[0002] The electrolytic cell is the core equipment of electrochemical reaction, and its performance directly affects the electrolysis efficiency, energy consumption and equipment life. The electrolytic cell is suitable for fields such as electrolysis of water to produce hydrogen, chlor-alkali industry and electrochemical synthesis. The polar frame of the traditional electrolytic cell is mostly made of metal materials, which has good electrical conductivity and mechanical strength, but has the problems of corrosion, high weight and cost, and poor sealing property. The metal material is easily corroded in an acidic or alkaline electrolyte, and the corrosion resistance needs to be enhanced by a transition metal or noble metal coating, which leads to high cost. The metal polar frame has high density, which leads to a heavy and difficult-to-transport and install equipment. The noble metal coating process is complex, which further increases the manufacturing cost. The difference in the thermal expansion coefficient between the metal and the sealing material leads to leakage when the temperature fluctuates.

[0003] In recent years, in order to solve the defects of the metal polar frame, non-metallic materials such as engineering plastics and composite materials have been gradually tried to be used in the electrolytic cell structure. However, the existing non-metallic polar frame has some defects. Under normal pressure, the polar frame is easily deformed due to internal pressure or assembly stress, which affects the sealing property. In the modular design, the existing polar frame is mostly circular or special-shaped structure, which is difficult to realize compact square stacking design, and limits the scale expansion of the electrolytic cell. SUMMARY

[0004] In order to solve the above problems, the present application provides a non-metallic polar frame suitable for a non-metallic square normal-pressure alkali water electrolytic cell, so as to solve the problems of the existing non-metallic polar frame, such as easy deformation of the polar frame under normal pressure affecting the sealing property and difficulty in realizing modular design to meet the stacking assembly.

[0005] The present application provides a non-metallic square polar frame with corrosion resistance, light weight and high sealing property, which solves the defects of the traditional metal polar frame such as high cost and easy corrosion, and the problems of the existing non-metallic polar frame such as insufficient structural strength and difficulty in realizing stacking assembly.

[0006] The first aspect of the present disclosure provides a non-metallic electrode frame suitable for non-metallic square atmospheric caustic soda electrolytic cell, specifically comprising: an electrode frame body and an assembly auxiliary part; the electrode frame body is made of corrosion-resistant non-metallic material, the cathode of the electrode frame body faces upward and the anode faces downward, the inside of the electrode frame body is provided with 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, the left and right sides of the electrode frame body are provided with electrode frame fixing blocks, the side surface of the electrode frame body is provided with a sealing groove, and the inner side of the electrode frame body is provided with a positioning step along the upper side; the assembly auxiliary part comprises a first connecting piece, a second connecting piece and an adjusting rod, a moving plate is welded beside the second connecting piece, the moving plate is inserted into the inside of the first connecting piece, the adjusting rod is inserted into the through hole formed in the middle of the moving plate, and the outer end surface of the adjusting rod is sleeved with a locking tube.

[0007] 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 trapezoidal, circular or arc-shaped, the sealing groove forms five regions of the cathode liquid outlet main flow channel area, the cathode liquid inlet main flow channel area, the anode liquid outlet main flow channel area, the anode liquid inlet main flow channel area and the reaction area, the sealing material can be selected from materials resistant to alkali and high temperature, and the positioning step is uniformly distributed with internal fixing holes.

[0008] In at least some embodiments, the gas-liquid mixture generated by the cathode reaction area flows through the cathode liquid outlet channel to the cathode liquid outlet main flow channel and finally collects outside the electrolytic device, the cathode liquid outlet channel is a circular through hole provided on the inner wall of the cathode liquid outlet main flow channel through hole, the hole direction is perpendicular to the thickness direction of the electrode frame body, and the hole is connected with the cathode reaction area, the gas-liquid mixture generated by the anode reaction area flows through the anode liquid outlet channel to the anode liquid outlet main flow channel and finally collects outside the electrolytic device, the anode liquid outlet channel is a circular through hole provided on the inner wall of the anode liquid outlet main flow channel through hole, the hole direction is perpendicular to the thickness direction of the electrode frame body, and the hole is connected with the anode reaction area.

[0009] In at least some embodiments, the two adjacent electrode frame fixing blocks are fixedly connected by the assembly auxiliary part to form an integrated module in pairs, supporting the quick stacking and assembly of multiple electrode frame bodies, the built-in flow guide channel of the interface ensures uniform distribution of the electrolyte, the upper wall of the through hole of the moving plate is provided with a toothed plate, the lower wall is provided with two toothed plates, the upper toothed plate is aligned with the toothed plate on the outer side of the lower wall, the inner end surface of the adjusting rod is welded with a circular plate, the adjusting rod is provided with a gear, the gear is engaged with the toothed plate, the outer end of the adjusting rod is provided with a threaded rod, the inner wall of the locking tube is provided with a threaded groove and is connected with the threaded rod through the thread, the inner end of the locking tube is clamped in the circular groove formed on the outer end surface of the first connecting piece, and the outer end of the locking tube is welded with a rotating plate.

[0010] In at least some embodiments, the cathode liquid inlet main flow channel and the anode liquid inlet main flow channel are arranged on the inner lower side of the pole frame body, and the cathode liquid inlet main flow channel and the anode liquid inlet main flow channel are both parallel arrays of circular through holes, the axis direction of the through holes is parallel to the thickness direction of the pole frame body, the cathode liquid outlet main flow channel and the anode liquid outlet main flow channel are arranged on the upper edge of the pole frame body, the cathode liquid outlet main flow channel is a parallel array of elliptical through holes, the axis direction of the through holes is parallel to the thickness direction of the pole frame body, and the anode liquid outlet main flow channel is a parallel array of square through holes, the through hole penetration direction is parallel to the thickness direction of the pole frame body.

[0011] In at least some embodiments, the cathode liquid inlet main flow channel supplies reaction electrolyte to the cathode reaction area through a cathode liquid inlet channel, the cathode liquid inlet channel is a circular through hole arranged on the inner wall of the cathode liquid inlet main flow channel, the hole direction is perpendicular to the thickness direction of the pole frame body, and the circular through hole is connected to the cathode reaction area, the cross section of the circular through hole can be one of a square, an ellipse and a special shape, and the anode liquid inlet main flow channel supplies reaction electrolyte to the anode reaction area through an anode liquid inlet channel, the anode liquid inlet channel is a circular through hole arranged on the inner wall of the anode liquid inlet main flow channel, the hole direction is perpendicular to the thickness direction of the pole frame body, and the circular through hole is connected to the anode reaction area, the cross section of the circular through hole can be one of a square, an ellipse and a special shape.

[0012] In at least some embodiments, the overall structure of the pole frame body is a square structure frame provided with a circular arc transition at four corners, the overall thickness of the pole frame body is 40-80mm, the length is 2-2.5m, and the width is 1-1.5m, wherein the length of the reaction area is 1.8-2.3m, and the width is 0.8-1.3m, the thickness direction of the pole frame body includes the cathode reaction area and the anode reaction area, and the size of the anode reaction area is smaller than that of the cathode reaction area, and the two reaction areas are isolated by a double-pole plate and a diaphragm assembly installed through a positioning step.

[0013] The application provides a non-metal pole frame suitable for a non-metal square atmospheric alkaline water electrolysis cell, which has the following beneficial effects:

[0014] In use, the assembly auxiliary part can flexibly adjust the assembly quantity of the pole frame body, and can increase the pressure borne by the pole frame body, so that the pole frame body will not be deformed under atmospheric pressure.

[0015] In addition, the sealing performance of the pole frame body can be improved through the design of the sealing groove, the self-weight of the pole frame body can be reduced through the non-metal design, and the square design can meet the stacking of multiple pole frame bodies, and the scale expansion of the electrolysis cell can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings of the embodiments will be briefly introduced below.

[0017] The accompanying drawings, which are described below, only relate to some embodiments of the present application, and are not a limitation on the present application.

[0018] In the drawings:

[0019] Figure 1 The front structure schematic diagram of the cathode of the polar frame body of the present application is shown;

[0020] Figure 2 The structure schematic diagram of the cathode liquid outlet main flow channel of the present application is shown;

[0021] Figure 3 The cross-sectional schematic diagram of the present application Figure 2 is shown;

[0022] Figure 4 The structure schematic diagram of the locking member of the present application is shown;

[0023] Figure 5 The cross-sectional schematic diagram of the present application Figure 2 is shown;

[0024] Figure 6 The enlarged structure schematic diagram of the present application Figure 5 is shown;

[0025] Figure 7 The cross-sectional schematic diagram of the present application Figure 2 is shown;

[0026] Figure 8 The enlarged structure schematic diagram of the present application Figure 1 is shown;

[0027] Figure 9 The cross-sectional schematic diagram of the present application Figure 8 is shown;

[0028] Figure 10 The cross-sectional schematic diagram of the present application Figure 8 is shown;

[0029] Figure 11 The cross-sectional schematic diagram of the present application Figure 8 is shown;

[0030] Figure 12 The polar frame sealing scheme structure schematic diagram of the present application is shown;

[0031] Figure 13 The structure schematic diagram of the anode liquid inlet channel of the present application is shown;

[0032] Figure 14 The structure schematic diagram of the cathode liquid outlet channel of the present application is shown;

[0033] Figure 15 The structure diagram of the polar frame fixing block of the present application is shown;

[0034] Figure 16 The structure diagram of the sealing groove of the present application is shown;

[0035] Figure 17 The installation structure diagram of the assembly aid of the present application is shown;

[0036] Figure 18 The expansion structure diagram of the assembly aid of the present application is shown.

[0037] List of reference signs

[0038] 101, cathode liquid outlet main flow channel; 102, cathode liquid outlet channel; 103, cathode liquid inlet main flow channel; 104, cathode liquid inlet channel;

[0039] 201, anode liquid outlet main flow channel; 202, anode liquid outlet channel; 203, anode liquid inlet main flow channel; 204, anode liquid inlet channel;

[0040] 301, internal fixing hole; 302, sealing groove; 303, polar frame fixing block; 304, positioning step;

[0041] 401, first connecting piece; 402, second connecting piece; 4021, moving plate; 403, locking pipe; 404, adjusting rod; 4041, threaded rod. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] Embodiment one: please refer to the drawings of the present application Figure 1 to the drawings of the present application Figure 16 :

[0044] This invention proposes a non-metallic electrode frame suitable for a non-metallic square atmospheric pressure alkaline water electrolyzer, comprising: an electrode frame body and assembly auxiliary components; the electrode frame body is made of corrosion-resistant non-metallic material, with the cathode facing upwards and the anode facing downwards; the electrode frame body internally is provided with a cathode outlet main channel 101, a cathode outlet channel 102, a cathode inlet main channel 103, a cathode inlet channel 104, an anode outlet main channel 201, an anode outlet channel 202, an anode inlet main channel 203, and an anode inlet channel 204; the left side of the electrode frame body... The right side is provided with pole frame fixing blocks 303, the side of the pole frame body is provided with sealing grooves 302, and the inner upper edge of the pole frame body is provided with positioning steps 304; the assembly auxiliary parts include a first connector 401, a second connector 402 and an adjusting rod 404. A movable plate 4021 is welded to the side of the second connector 402. The movable plate 4021 is inserted into the first connector 401. The adjusting rod 404 is inserted into the through hole in the middle of the movable plate 4021, and a locking tube 403 is sleeved on the outer end face of the adjusting rod 404.

[0045] In the embodiments disclosed herein, as shown in the appendix Figure 1 As shown, the cathode liquid inlet main channel 103 and the anode liquid inlet main channel 203 are located on the lower inner side of the electrode frame body. Both the cathode liquid inlet main channel 103 and the anode liquid inlet main channel 203 are circular through holes arranged in a parallel array. The axial direction of the through holes is parallel to the thickness direction of the electrode frame body. The cathode liquid outlet main channel 101 and the anode liquid outlet main channel 201 are located on the upper edge of the electrode frame body. The cathode liquid outlet main channel 101 is an elliptical through hole arranged in a parallel array. The axial direction of the through hole is parallel to the thickness direction of the electrode frame body. The anode liquid outlet main channel 201 is a square through hole arranged in a parallel array. The through hole penetration direction is parallel to the thickness direction of the electrode frame body.

[0046] In the embodiments disclosed herein, as shown in the appendix Figure 1 As shown, the main body of the electrode frame has a square frame with rounded corners. The overall thickness of the electrode frame is 40-80 mm, the length is 2-2.5 m, and the width is 1-1.5 m. The reaction area is 1.8-2.3 m long and 0.8-1.3 m wide. The thickness of the electrode frame includes the cathode reaction area and the 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 by the positioning step 304.

[0047] In the embodiments disclosed herein, as shown in the appendix Figure 4 Appendix Figure 7 and attached Figure 8As shown, the cathode liquid inlet main flow channel 103 supplies reaction electrolyte to the cathode reaction area through the cathode liquid inlet channel 104, the cathode liquid inlet channel 104 is a circular through hole provided on the inner wall of the through hole of the cathode liquid inlet main flow channel 103, the direction of the hole is perpendicular to the thickness direction of the main body of the polar frame, and the circular through hole is connected to the cathode reaction area, the cross section of the circular through hole can be one of square, oval, and special shape, the anode liquid inlet main flow channel 203 supplies reaction electrolyte to the anode reaction area through the anode liquid inlet channel 204, the anode liquid inlet channel 204 is a circular through hole provided on the inner wall of the through hole of the anode liquid inlet main flow channel 203, the direction of the hole is perpendicular to the thickness direction of the main body of the polar frame, and the circular through hole is connected to the anode reaction area, the cross section of the circular through hole can be one of square, oval, and special shape.

[0048] In the embodiments of the present disclosure, as shown in FIG. 1 and FIG. 2, the through hole shape of the cathode liquid inlet main flow channel 103, the anode liquid inlet main flow channel 203, the cathode liquid outlet main flow channel 101, and the anode liquid outlet main flow channel 201 can be one of circular, square, oval, and special shape. Figures 8-11

[0049] In the embodiments of the present disclosure, as shown in FIG. 1 and FIG. 2, the through hole shape of the cathode liquid inlet main flow channel 103, the anode liquid inlet main flow channel 203, the cathode liquid outlet main flow channel 101, and the anode liquid outlet main flow channel 201 can be one of circular, square, oval, and special shape. Figure 5 Figure 6 As shown in FIG. 1 and FIG. 2, the cross-sectional shape of the sealing groove 302 is rectangular, and the cross-sectional shape of the sealing groove 302 can also be replaced by one of trapezoidal, circular, or arc shape, the cathode liquid outlet main flow channel area, the cathode liquid inlet main flow channel area, the anode liquid outlet main flow channel area, the anode liquid inlet main flow channel area, and the reaction area are formed by the sealing groove 302, the sealing material can be selected from materials resistant to alkali and high temperature, including but not limited to reinforced fluorine rubber, glass fiber reinforced polyphenylene sulfide, polytetrafluoroethylene, and the like.

[0050] In the embodiments of the present disclosure, as shown in FIG. 1 and FIG. 2, the through hole shape of the cathode liquid inlet main flow channel 103, the anode liquid inlet main flow channel 203, the cathode liquid outlet main flow channel 101, and the anode liquid outlet main flow channel 201 can be one of circular, square, oval, and special shape. Figure 13 Figure 14 As shown in FIG. 1 and FIG. 2, the cross-sectional shape of the sealing groove 302 is rectangular, and the cross-sectional shape of the sealing groove 302 can also be replaced by one of trapezoidal, circular, or arc shape, the cathode liquid outlet main flow channel area, the cathode liquid inlet main flow channel area, the anode liquid outlet main flow channel area, the anode liquid inlet main flow channel area, and the reaction area are formed by the sealing groove 302, the sealing material can be selected from materials resistant to alkali and high temperature, including but not limited to reinforced fluorine rubber, glass fiber reinforced polyphenylene sulfide, polytetrafluoroethylene, and the like.

[0051] In the embodiments of the present disclosure, as shown in FIG. 1 and FIG. 2, the through hole shape of the cathode liquid inlet main flow channel 103, the anode liquid inlet main flow channel 203, the cathode liquid outlet main flow channel 101, and the anode liquid outlet main flow channel 201 can be one of circular, square, oval, and special shape. Figure 15 ​​​As shown, internal fixing holes 301 are evenly distributed on the positioning step 304. The internal fixing holes 301 allow components such as buckles, rivets, and bolts to pass through, so as to complete the fixed assembly between the pole frame body and the bipolar plate.

[0052] like Figures 17-18 As shown in Embodiment 2, based on Embodiment 1, adjacent pole frame fixing blocks 303 are fixedly connected by assembly auxiliary parts to form integrated modules in pairs, supporting rapid stacking and assembly of multi-pole frame bodies. The interface has a built-in flow channel to ensure uniform distribution of electrolyte. The upper wall of the through hole of the moving plate 4021 is provided with a toothed plate, and the lower wall is provided with two toothed plates. 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, which meshes with the toothed plate. A threaded rod 4041 is provided at the outer end of the adjusting rod 404. The inner wall of the locking tube 403 is threaded. The groove is connected to the threaded rod 4041 by a thread. The inner end of the locking tube 403 is engaged in the circular groove opened on the outer end face of the first connector 401. The outer end of the locking tube 403 is welded with a rotating plate. After rotating the rotating plate, the locking tube 403 is rotated, and the inner end of the locking tube 403 is disengaged from the first connector 401. The rotating plate is pulled to move the adjusting rod 404 through the locking tube 403, so that the gear disengages from the upper tooth plate and meshes with the lower inner tooth plate. Rotating the rotating plate can drive the adjusting rod 404 to rotate, so that the moving plate 4021 can be adjusted in position. After determining the adjustment position according to the number of pole frame bodies to be assembled and fixed as needed, the locking is achieved by reversing the operation.

[0053] The working principle of this embodiment is as follows: After the pole frame body, bipolar plates and diaphragm are placed in sequence, they are assembled. The rotating plate drives the adjusting rod 404 to rotate through the locking tube 403 until the first connecting piece 401 and the second connecting piece 402 clamp all the pole frame bodies. Then, the rotating plate is pulled so that the circular plate at the inner end of the adjusting rod 404 is engaged with the first connecting piece 401 until the inner end face of the circular plate is flush with the inner end face of the first connecting piece 401. At this time, the gear is engaged with the upper and lower tooth plates, so that the adjusting rod 404 cannot rotate. Finally, the rotating plate is rotated until the inner end of the locking tube 403 is engaged with the circular groove opened on the outer end face of the first connecting piece 401, thus completing the assembly of the pole frame body.

[0054] It should be noted that the main body of the pole frame in this application is made of plastic, but it can also be made of concrete through molding, or it can be made of materials such as ceramics that have both hardness and plasticity. Its performance is the same as or even better than that of this invention, and all of them should be within the protection scope of this application.

Claims

1. A non-metallic polar frame suitable for a non-metallic square atmospheric caustic soda electrolyzer, characterized in that, include: The electrode frame body and assembly auxiliary parts; the electrode frame body is made of corrosion-resistant non-metallic material, with the cathode facing upward and the anode facing downward. The electrode frame body is provided with 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). The left and right sides of the electrode frame body are provided with electrode frame fixing blocks (303). The side of the electrode frame body is provided with a sealing groove (302), which forms the cathode liquid outlet main channel area and the cathode liquid inlet main channel area through the sealing groove (302). The system comprises five main areas: the flow channel area, the anode liquid outlet main channel area, the anode liquid inlet main channel area, and the reaction zone. A positioning step (304) is provided on the upper inner edge of the electrode frame body. The cathode liquid inlet channel (104) is a circular through-hole on the inner wall of the cathode liquid inlet main channel (103), with the hole direction perpendicular to the thickness direction of the electrode frame body and connecting to the cathode reaction zone. The anode liquid inlet channel (204) is a circular through-hole on the inner wall of the anode liquid inlet main channel (203), with the hole direction perpendicular to the thickness direction of the electrode frame body and connecting to the anode reaction zone. The cathode liquid outlet channel (102) is a circular through-hole on the inner wall of the cathode liquid outlet main channel (101), with the hole direction perpendicular to the thickness direction of the electrode frame body and connecting to the anode reaction zone. A circular through hole perpendicular to the thickness direction of the electrode frame body and connected to the cathode reaction area; the anode outlet channel (202) is: a circular through 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 electrode frame body and connected to the anode reaction area; the assembly auxiliary component includes a first connector (401), a second connector (402) and an adjusting rod (404), a movable plate (4021) is welded to the side of the second connector (402), the movable plate (4021) is inserted into the first connector (401), the upper wall of the through hole of the movable plate (4021) is provided with a toothed plate and the lower wall is provided with two toothed plates, wherein the upper toothed plate is provided with a toothed plate. The toothed plate and the toothed plate on the outer side of the lower wall are aligned vertically. The adjusting rod (404) is inserted into the through hole in the middle of the moving plate (4021). A circular plate is welded to the inner end face of the adjusting rod (404). A gear is provided on the adjusting rod (404). The gear meshes with the toothed plate. A threaded rod (4041) is provided at the outer end of the adjusting rod (404). A locking tube (403) is sleeved on the outer end face of the adjusting rod (404). A threaded groove is opened on the inner wall of the locking tube (403) and it is connected to the threaded rod (4041) by thread. The inner end of the locking tube (403) is engaged in the circular groove opened on the outer end face of the first connecting piece (401). A rotating plate is welded to the outer end of the locking tube (403).

2. The non-metallic polar frame suitable for non-metallic square atmospheric caustic soda electrolyzer according to claim 1, characterized in that, The main body of the electrode frame has a square frame with rounded corners. The overall thickness of the electrode frame is 40-80 mm, the length is 2-2.5 m, and the width is 1-1.5 m. 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 includes the cathode reaction area and the anode reaction area. The size of the anode reaction area is smaller than that of the cathode reaction area. The two reaction areas are isolated by bipolar plates and diaphragm assemblies installed by positioning steps (304).

3. The non-metallic polar frame suitable for non-metallic square atmospheric caustic soda electrolyzer according to claim 2, characterized in that, The cathode liquid inlet channel (103) and the anode liquid inlet channel (203) are located on the lower inner side of the electrode frame body. Both the cathode liquid inlet channel (103) and the anode liquid inlet channel (203) are circular through holes arranged in a parallel array. The axial direction of the through holes is parallel to the thickness direction of the electrode frame body. The cathode liquid outlet channel (101) and the anode liquid outlet channel (201) are located on the upper edge of the electrode frame body. The cathode liquid outlet channel (101) is an elliptical through hole arranged in a parallel array. The axial direction of the through hole is parallel to the thickness direction of the electrode frame body. The anode liquid outlet channel (201) is a square through hole arranged in a parallel array. The through hole's penetration direction is parallel to the thickness direction of the electrode frame body.

4. The non-metallic polar frame suitable for non-metallic square atmospheric caustic soda electrolyzer according to claim 1, characterized in that, The sealing groove (302) has a rectangular cross-sectional shape.

5. The non-metallic polar frame suitable for non-metallic square atmospheric caustic soda electrolyzer according to claim 1, characterized in that, Internal fixing holes (301) are evenly distributed on the positioning step (304).

6. The non-metallic polar frame suitable for non-metallic square atmospheric caustic soda electrolyzer according to claim 3, characterized in that, The cathode inlet main channel (103) supplies the reaction electrolyte to the cathode reaction area through the cathode inlet channel (104).

7. The non-metallic polar frame suitable for non-metallic square atmospheric caustic soda electrolyzer according to claim 3, characterized in that, The anode inlet main channel (203) supplies the reaction electrolyte to the anode reaction area through the anode inlet channel (204).

8. The non-metallic polar frame suitable for non-metallic square atmospheric caustic soda electrolyzer according to claim 1, characterized in that, The gas-liquid mixture generated in the cathode reaction zone flows through the cathode outlet channel (102) to the cathode outlet main channel (101) and is eventually collected outside the electrolysis device.

9. A non-metallic electrode frame suitable for a non-metallic square atmospheric pressure alkaline water electrolyzer according to claim 1, characterized in that, The gas-liquid mixture generated in the anode reaction zone flows through the anode outlet channel (202) to the anode outlet main channel (201) and is eventually collected outside the electrolysis device.

10. A non-metallic electrode frame suitable for a non-metallic square atmospheric pressure alkaline water electrolyzer according to claim 1, characterized in that, The two adjacent pole frame fixing blocks (303) are fixedly connected by assembly auxiliary parts.

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