Electrolytic bath

Abstract

The utility model discloses an electrolytic bath which comprises a plurality of electrolytic units, each electrolytic unit comprises a polar plate, a polar frame and a supporting plate, the polar frame covers the outer edge of the polar plate, the supporting plate is fixed below the polar frame, one of the polar frame and the supporting plate is provided with a slot, the other one of the polar frame and the supporting plate is provided with an inserting part, and the inserting part is matched with the slot. The electrode frame of the single electrolysis unit of the electrolytic bath is detachably connected with the supporting plate, so that the electrolytic bath has relatively good connection stability, is convenient to disassemble and assemble, and is relatively low in cost and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production by electrolyzing water, in particular to an electrolytic cell. Background Art

[0002] At present, conventional alkaline electrolytic cells mostly adopt a filter press structure. The hydrogen production per single cell exceeds 1000 Nm / h. The electrolytic unit consists of electrode plates, electrode frames, electrode meshes, diaphragms, and gaskets, with the number exceeding 300. Each electrolytic unit is installed between two end plates and is pressed and fixed through tension members (long studs, nuts, disc springs, etc.) to achieve the partition and sealing between the hydrogen side and the oxygen side of each electrolytic unit.

[0003] Traditional filter press electrolytic cells need to be assembled at the manufacturer, which has high requirements for the workshop. Moreover, components such as electrode frames and electrode plates usually adopt steel structure parts, with a relatively large overall mass, often greater than 50 tons, and need to be shipped as a whole unit, making long-distance transportation difficult, and the manufacturing raw material cost is also relatively high. Due to the large temperature difference during the start-stop process of the electrolytic cell, the gasket may creep, thus affecting the sealing of the cell body and resulting in liquid leakage. When liquid leakage occurs in the cell body, it is usually solved by further tightening the tension members. When the liquid leakage of the cell body cannot be handled in this way, it needs to be returned to the factory for repair, and the whole cell body needs to be disassembled to replace the failed sealing gasket. The disassembly and assembly work is complex, with a large workload, a long maintenance cycle, and high costs, and all the sealing gaskets after disassembly cannot be reused.

[0004] Therefore, it is necessary to provide a new electrolytic cell to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a freely detachable electrolytic cell to solve the problems of great difficulty in overall disassembly during the repair of the electrolytic cell and high costs caused by the inability to reuse the sealing gasket after disassembly.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An electrolytic cell includes a plurality of electrolytic units. Each electrolytic unit includes an electrode plate, an electrode frame, and a support plate. The electrode frame covers the outer edge of the electrode plate, and the support plate is fixed below the electrode frame. One of the electrode frame and the support plate is provided with a slot, and the other is provided with a plug-in part, and the slot is adapted to the plug-in part.

[0008] As a further improved technical scheme of the utility model, the electrode frame is provided with the slot, and the support plate includes a support part and the plug-in part, and the plug-in part is adapted to the slot.

[0009] As a further improved technical scheme of the utility model, the thickness of the support part is greater than the thickness of the plug-in part, and the thickness of the electrode frame is equal to the thickness of the support part.

[0010] As a further improved technical solution of the present utility model, the electrolytic cell further includes a first end plate, a second end plate, and a connecting plate fixedly connecting the first end plate and the second end plate, and a space for accommodating a plurality of the electrolytic units is formed by enclosing the first end plate, the second end plate, and the connecting plate.

[0011] As a further improved technical solution of the present utility model, the electrolytic cell further includes a guide rail, the guide rail is fixed between the first end plate and the second end plate, the electrolytic unit is arranged on the guide rail, the supporting portion is provided with a slot, the slot is adapted to the guide rail, and the supporting plate can drive the electrolytic unit to move along the guide rail.

[0012] As a further improved technical solution of the present utility model, the electrolytic cell further includes a pressing plate and a power mechanism arranged between the first end plate and the second end plate, the electrolytic unit is located between the first end plate and the pressing plate, the power mechanism is arranged between the pressing plate and the second end plate, and the power mechanism drives the pressing plate to approach or move away from the first end plate.

[0013] As a further improved technical solution of the present utility model, the slot is of an inverted trapezoidal structure, and the width of the slot near the end of the pole frame is greater than the width of the end away from the pole frame.

[0014] As a further improved technical solution of the present utility model, the electrolytic cell further includes a connecting component connecting adjacent electrolytic units, the connecting component includes a connecting piece and a fastener, the connecting piece is fixedly connected with the adjacent supporting plate through the fastener, and each supporting plate is respectively connected with the adjacent supporting plates in pairs through a plurality of the connecting components.

[0015] As a further improved technical solution of the present utility model, among the electrolytic units near the first end plate, the electrolytic units near the second end plate, and the electrolytic units in the middle, both the pole frame and the supporting plate are made of metal materials, and the pole frame is connected with a conductive piece;

[0016] In other electrolytic units, a plurality of through holes are provided at the connection between the electrode plate and the pole frame, the pole frame is integrally formed of a non-metallic material on the outer edge of the electrode plate and fills the through holes, and the supporting plate is made of a non-metallic material.

[0017] As a further improved technical solution of the present utility model, the electrolytic cell further includes a backing plate, a plurality of backing plates are fixedly arranged at intervals, the guide rail is laid on the backing plate and connects all the backing plates, and the first end plate and the second end plate are respectively fixed on the backing plates at both ends.

[0018] Compared with the prior art, the beneficial effects of the electrolytic cell of the present utility model are as follows: By respectively providing one of the slots and the mating insertion parts on the pole frame and the support plate, a detachable connection is achieved between the pole frame and the support plate; when it is necessary to replace the parts other than the support plate in the electrolytic unit, only the fixedly connected parts such as the pole frame and the electrode plate need to be removed and replaced correspondingly, and then the whole is inserted into the support plate. This electrolytic cell has good connection stability, is convenient for disassembly and assembly, has low cost, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the electrolytic cell according to a specific embodiment of the present utility model;

[0020] Figure 2 is a front view structural schematic diagram of a single electrolytic unit according to a specific embodiment of the present utility model;

[0021] Figure 3 is an exploded structural schematic diagram of the electrolytic unit according to a specific embodiment of the present utility model;

[0022] Figure 4 is Figure 3 an enlarged structural schematic diagram of area A in

[0023] Figure 5 is Figure 3 an enlarged structural schematic diagram of area B in

[0024] Figure 6 is a side view structural schematic diagram of a single electrolytic unit according to a specific embodiment of the present utility model;

[0025] Figure 7 is Figure 6 an enlarged structural schematic diagram of area C in

[0026] Figure 8 is an enlarged structural schematic diagram of area D in

[0027] Figure 9 is a sectional structural schematic diagram of the electrolytic unit according to a specific embodiment of the present utility model;

[0028] Figure 10 is Figure 9 an enlarged structural schematic diagram of area E in

[0029] Figure 11 is an installation schematic diagram of the electrolytic unit according to a specific embodiment of the present utility model;

[0030] Figure 12 is a side view structural schematic diagram after installing multiple electrolytic units according to a specific embodiment of the present utility model;

[0031] Figure 13 isFigure 12 Schematic diagram of the enlarged structure of the F region in the middle;

[0032] Figure 14 It is an installation schematic diagram of an electrolytic cell according to a specific embodiment of the present invention. Specific embodiments

[0033] Hereinafter, the exemplary specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. If there are several specific embodiments, the features in these embodiments can be combined with each other without conflict. When the description involves the accompanying drawings, unless otherwise specified, the same numbers in different drawings represent the same or similar elements. The content described in the following exemplary specific embodiments does not represent all embodiments consistent with the present invention; on the contrary, they are merely examples of devices, products, and / or methods consistent with some aspects of the present invention recorded in the claims of the present invention.

[0034] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the protection scope of the present invention. The singular forms of "a", "the", or "said" used in the specification and claims of the present invention are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0035] It should be understood that the terms such as "first", "second", and similar words used in the specification and claims of the present invention do not represent any order, quantity, or importance, but are only used to distinguish the named features. Similarly, words such as "one" or "a" do not represent a quantity limitation, but mean that there is at least one. Unless otherwise indicated, the words such as "front", "rear", "upper", "lower", etc. that appear in the present invention are only for convenience of description, and are not limited to a specific position or a spatial orientation. The expression "including" or "comprising" and similar words are an open-ended expression, meaning that the elements appearing before "including" or "comprising" cover the elements appearing after "including" or "comprising" and their equivalents, which does not exclude that the elements appearing before "including" or "comprising" may also include other elements. If "several" appears in the present invention, it means two or more.

[0036] Please refer to Figures 1 to 14 As shown, this embodiment discloses an electrolytic cell, including a first end plate 21, a second end plate 22, a connecting plate 23, and a plurality of electrolysis units 1. The connecting plate 23 is fixedly connected to the first end plate 21 and the second end plate 22. The first end plate 21, the second end plate 22, and the connecting plate 23 enclose a space for accommodating a plurality of electrolysis units 1. The electrolysis units 1 are arranged in this space and all the electrolysis units 1 are hermetically sealed as a whole.

[0037] Please refer to Figures 2 to 8 As shown, each electrolysis unit 1 includes a plate electrode 11, a frame 12 and a support plate 13. The plate electrode 11 is provided with a plurality of convex structures. The plurality of convex structures protrude towards both sides of the plate electrode 11 at intervals and correspond to the convexes on the adjacent plate electrodes, so as to provide a flow channel for the electrolyte. The frame 12 is coated on the outer edge of the plate electrode 11, and the support plate 13 is fixed below the frame 12. Further, one of the frame 12 and the support plate 13 is provided with a slot 121, and the other is provided with a plugging portion 132. The slot 121 is adapted to the plugging portion 132 to limit the connection between the frame 12 and the support plate 13; in this embodiment, the frame 12 is provided with the slot 121, and the support plate 13 includes a support portion 131 and a plugging portion 132. The plugging portion 132 is adapted to the slot 121. Preferably, the thickness of the plugging portion 132 is the same as the width of the slot 121, so that the frame 12 and the support plate 13 will not move in the thickness direction due to loosening after being plugged. The height of the plugging portion 132 is the same as the depth of the slot 121, so that the frame 12 and the support plate 13 can be better cooperatively connected. After the frame 12 and the support plate 13 are plugged, at least part of the frame 12 abuts against the support portion 131, and at least part of the plugging portion 132 abuts against the bottom of the slot 121, so that the single electrolysis unit 1 has better connection stability.

[0038] In other embodiments, the support plate 13 is provided with the slot 121, and the frame 12 is provided with the plugging portion 132.

[0039] Please refer to Figures 3 to 8 As shown, the thickness of the frame 12 is greater than the thickness of the plate electrode 11, the thickness of the support portion 131 is greater than the thickness of the plugging portion 132, and the thickness of the frame 12 is equal to the thickness of the support portion 131. In this way, when the frame 12 and the support plate 13 are plugged and all the electrolysis units 1 are pressed tightly, the frames 12 of the adjacent electrolysis units 1 abut and fit against each other, the support plates 13 of the adjacent electrolysis units 1 also abut and fit against each other. At the same time, a cavity for the electrolyte to flow is formed between the plate electrodes 11 of the adjacent electrolysis units 1, and the periphery of the cavity is enclosed by the adjacent frames 12, so that liquid leakage is not likely to occur, and it has good sealing performance.

[0040] Please refer to Figure 2 and Figure 3 As shown, the electrolysis unit 1 further includes a sealing gasket 14. The sealing gasket 14 is arranged between the adjacent plate electrodes 11. One side of the sealing gasket 14 forms an anode, and the other side forms a cathode. The sealing gasket 14 can be fixed to the sealing surface of the frame 12 by an adhesive method or by a pin shaft. The sealing surfaces of all the frames 12 are located on the same side.

[0041] Please refer to Figure 2 、 Figure 3 and Figure 9As shown, the pole frame 12 is provided with a liquid inlet hole 122 and an exhaust hole 123. The liquid inlet hole 122 is relatively located below the electrode plate 11 for the circulation of the electrolyte. The exhaust hole 123 is relatively located above the electrode plate 11 for discharging the gas generated during the electrolysis process. A plurality of liquid inlet holes 122 and exhaust holes 123 can be respectively provided.

[0042] Please refer to Figure 1 、 Figure 2 、 Figure 11 and Figure 14 As shown, the electrolytic cell of this embodiment further includes a guide rail 3. The guide rail 3 is fixed between the first end plate 21 and the second end plate 22, and the electrolysis unit 1 is arranged on the guide rail 3. Further, the support portion 131 of the support plate 13 is provided with a slot hole 1311, and the slot hole 1311 is adapted to the guide rail 3. The support plate 13 can drive the electrolysis unit 1 to move along the guide rail 3. Further, the width of the slot hole 1311 at one end close to the pole frame 12 is greater than the width at one end far from the pole frame 12, so as to prevent the support plate 13 from falling off the guide rail 3. In this embodiment, the slot hole 1311 is in an inverted trapezoid shape, and the number of the slot holes 1311 provided on the support plate 13 is equal to the number of the guide rails 3. The guide rail 3 includes a guiding portion 31 and a lifting portion 32. The guiding portion 31 is arranged on the lifting portion 32, and the guiding portion 31 is adapted to the shape and size of the slot hole 1311. The slot hole 1311 of the support portion 131 is clamped with the guiding portion 31, and at least a part of the lower edge of the support portion 131 abuts against the lifting portion 32. With such an arrangement, the support plate 13 can always be located on the guide rail 3 and is not prone to tilting, and can also move on the guide rail 3 to reduce or increase the distance between the electrolysis units 1, while reducing the friction generated by the movement of the support plate 13.

[0043] Please refer to Figure 1 、 Figure 11 and Figure 14 As shown, the guide rail 3 is composed of multiple segments, which is convenient for disassembly and transportation. In order to facilitate the installation of the guide rail 3, the electrolytic cell of this embodiment further includes a backing plate 8. A plurality of backing plates 8 are fixedly arranged at intervals, and the distance between adjacent backing plates 8 is less than the length of each segment of the guide rail 3. The guide rail 3 is laid on the backing plates 8 and connects all the backing plates 8. Each segment of the guide rail 3 is connected end to end, and the first end plate 21 and the second end plate 22 are respectively fixed to the backing plates 8 at both ends. The two ends of the guide rail 3 respectively abut against the first end plate 21 and the second end plate 22 to improve the overall connection stability of the electrolytic cell.

[0044] Please refer to Figure 1 and Figure 14As shown in the figure, the electrolytic cell of this embodiment further includes a pressing plate 4 and a power mechanism 5 disposed between the first end plate 21 and the second end plate 22. All the electrolytic units 1 are located between the first end plate 21 and the pressing plate 4, and the power mechanism 5 is disposed between the pressing plate 4 and the second end plate 22. The power mechanism 5 drives the pressing plate 4 to move closer to or away from the first end plate 21. With such a setting, the power mechanism 5 can press the electrolytic units 1 to make them all closely attached and keep sealed, and to a certain extent, the pressing plate 4 protects the electrolytic units 1 from being easily damaged. The first end plate 21 and the second end plate 22 are fixedly arranged, and the pressing plate 4, like the electrolytic units 1, is movably installed on the guide rail 3. The power mechanism 5 is installed on the second end plate 22 and exerts a force on the pressing plate 4. In this embodiment, the power mechanism 5 adopts a hydraulic cylinder. The fixed end of the power mechanism 5 is fixed to the second end plate 22, and the movable end of the power mechanism 5 is fixed to the pressing plate 4. The power mechanism 5 provides a pre-tightening force and presses the electrolytic cell during the assembly of the electrolytic cell to ensure that the internal structures are in zero-distance contact.

[0045] Please refer to Figure 5 、 Figure 12 and Figure 13 As shown in the figure, in some embodiments, to further improve the connection firmness between adjacent electrolytic units 1, the electrolytic cell further includes a connection assembly 6 for connecting adjacent electrolytic units 1. The connection assembly 6 includes a connection piece 61 and a fastener 62. The connection piece 61 is fixedly connected to the adjacent support plate 13 through the fastener 62. Each support plate 13 is respectively connected to the adjacent support plate 13 in pairs through a plurality of connection assemblies 6. The connection piece 61 is provided with two connection holes 611, and the side surface of the support portion 131 is provided with a fixing hole 1312. The distance between the two connection holes 611 is equal to the thickness of the support portion 131. The fastener 62 passes through the connection hole 611 and the fixing hole 1312; in this way, the adjacent support plates 13 and the adjacent electrolytic units 1 are all closely arranged. A plurality of fixing holes 1312 are spaced along the height direction on the side surface of the support portion 131 to be fixedly connected to the adjacent support plates 13 on both sides respectively. For example, the odd-numbered fixing holes 1312 from top to bottom are fixedly connected to the adjacent support plate 13 on the left side through the connection assembly 6, and the even-numbered fixing holes 1312 are fixedly connected to the adjacent support plate 13 on the right side through the connection assembly 6, and so on. All the support plates 13 are fixedly connected; further, the electrolytic units 1 at both outer ends can be respectively fixedly connected to the first end plate 21 and the pressing plate 4 through the connection assembly 6, and the size of the connection piece 61 and the distance between the two connection holes 611 are set separately according to the thickness dimensions of the first end plate 21 and the pressing plate 4.

[0046] Please refer to Figure 1 、 Figure 9 and Figure 10As shown, in the electrolytic cell of this embodiment, in the electrolytic units 1 near the first end plate 21, the electrolytic units 1 near the second end plate 22, i.e., near the pressing plate 4, and the electrolytic units 1 in the middle, both the electrode frame 12 and the support plate 13 are made of metal materials to ensure the mechanical strength of the electrolytic cell, and the electrode frame 12 is connected with a conductive member 7 to provide electrical conductivity for the electrolytic cell. In other electrolytic units 1, both the electrode frame 12 and the support plate 13 are made of non-metallic materials, which can greatly reduce the overall weight of the electrolytic cell. The non-metallic materials can specifically be PSU (polysulfone), PEEK (polyetheretherketone), PEI (polyetherimide), modified PTFE (polytetrafluoroethylene), etc.; the electrode frame 12 is integrally formed on the outer edge of the electrode plate 11 from a non-metallic material. Further, a plurality of through holes 111 are provided at the connection between the electrode plate 11 and the electrode frame 12, and the through holes 111 are filled when the electrode frame 12 is formed, so as to improve the connection strength between the electrode plate 11 and the electrode frame 12 and reduce the risk of internal leakage of the electrolyte through the gap between the electrode frame 12 and the electrode plate 11.

[0047] Please refer to Figure 1 and Figure 14 As shown, when installing the electrolytic cell of this embodiment, first, the spacer plates 8 are arranged at intervals, the guide rails 3 are fixed on the spacer plates 8, and the first end plate 21 and the second end plate 22 are respectively fixed on the spacer plates 8 at both ends. The power mechanism 5 is pre-installed on one side of the second end plate 22 close to the first end plate 21, and both ends of the connecting plate 23 are fixed on the first end plate 21 and the second end plate 22 with bolts; then, the support plates 13 and the pressing plate 4 are sequentially installed on the guide rails 3 from left to right in the figure, and then the electrode plates 11 and the electrode frames 12 can be integrally inserted into the support plates 13; before insertion, the electrodes, diaphragms, and sealing gaskets 14 need to be fixed in advance, and the conductive members 7 are connected to the electrode frames 12 of the electrolytic units 1 at both ends and in the middle; after all the electrode plates 11 and the electrode frames 12 are installed, the power mechanism 5 is used to push the pressing plate 4 to press all the electrolytic units 1; after pressing, the connecting assembly 6 is used to fix the adjacent support plates 13. All the components of this electrolytic cell can be shipped separately and installed on-site at the use location, solving the problems of excessive weight, volume, and difficult transportation of large electrolytic cells.

[0048] When internal parts of the electrolytic cell need to be replaced, for example, when the Nth electrolysis unit 1 needs to replace the sealing gasket 14 or other internal parts, loosen the fasteners 62 on the connecting piece 61 of the N-1th and N+1th support plates 13, without disassembling the connecting pieces 61 of other electrolysis units 1; release the pressure of the hydraulic cylinder serving as the power mechanism 5, and separate the Nth electrode plate 11 and the electrode frame 12 from the electrolytic cell; after replacing the failed components in the Nth unit, reinstall the electrode plate 11 and the electrode frame 12 of this piece into the corresponding support plate 13; finally, use the power mechanism 5 to press all the electrolysis units 1 tightly again, and after locking the connecting piece 61 and the fastener 62 between the Nth support plate 13 and the N-1th and N+1th support plates 13, the replacement is completed. Of course, it is also possible not to disassemble the connecting component 6 that fixes the adjacent support plates 13. After the power mechanism 5 cancels the pressing force on the electrolysis unit 1, directly pull out the electrode plate 11 and the electrode frame 12 of the parts to be replaced upwards. This electrolytic cell does not need to be sent back to the factory for repair. Maintenance personnel can disassemble and process it on site, and only need to replace the sealing gasket 14 of one or more electrolysis units with sealing failure, without replacing all the sealing gaskets 14, which can greatly shorten the maintenance time and cost.

[0049] In summary, compared with the prior art, the electrolytic cell of the present utility model has the following advantages: by respectively providing one of the slots 121 and the mating insertion parts 132 on the electrode frame 12 and the support plate 13, a detachable connection is achieved between the electrode frame 12 and the support plate 13; when replacing parts other than the support plate 13 in the electrolysis unit 1, only need to remove the fixedly connected components such as the electrode frame 12 and the electrode plate 11, replace them correspondingly, and then insert them into the support plate 13 as a whole. This electrolytic cell has good connection stability, is convenient for disassembly and assembly, has a low cost, and is highly practical.

[0050] The above embodiments are only used to illustrate the present utility model and do not limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art of the relevant technical field. Although this specification has described the present utility model in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the relevant technical field can still modify or equivalently replace the present utility model. All technical solutions and their improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. An electrolytic cell, characterized in that: The invention comprises a plurality of electrolytic units (1), each of the electrolytic units (1) comprises a pole plate (11), a pole frame (12) and a support plate (13), the pole frame (12) is wrapped around the outer edge of the pole plate (11), the support plate (13) is fixed below the pole frame (12), one of the pole frame (12) and the support plate (13) is provided with a slot (121), and the other of the pole frame (12) and the support plate (13) is provided with a plug-in portion (132), and the slot (121) is adapted to fit the plug-in portion (132).

2. An electrolytic cell according to claim 1, characterized in that: The pole frame (12) is provided with the slot (121), and the support plate (13) comprises a support portion (131) and the plug-in portion (132), and the plug-in portion (132) is adapted to the slot (121).

3. The electrolytic cell according to claim 2, characterized in that: The thickness of the support portion (131) is greater than the thickness of the plug-in portion (132), and the thickness of the pole frame (12) is equal to the thickness of the support portion (131).

4. The electrolytic cell according to claim 2, characterized in that: The electrolytic cell further comprises a first end plate (21), a second end plate (22) and a connecting plate (23) fixedly connecting the first end plate (21) and the second end plate (22); the first end plate (21), the second end plate (22) and the connecting plate (23) are arranged to form a space for accommodating a plurality of the electrolytic units (1).

5. The electrolytic cell according to claim 4, characterized in that: The electrolytic cell further comprises a guide rail (3), wherein the guide rail (3) is fixed between the first end plate (21) and the second end plate (22), and the electrolytic unit (1) is arranged on the guide rail (3). The support portion (131) is provided with a slot hole (1311), and the slot hole (1311) is adapted to the guide rail (3). The support plate (13) can drive the electrolytic unit (1) to move along the guide rail (3).

6. The electrolytic cell according to claim 5, characterized in that: The electrolytic cell further comprises a pressing plate (4) and a power mechanism (5) arranged between the first end plate (21) and the second end plate (22); the electrolytic unit (1) is located between the first end plate (21) and the pressing plate (4); the power mechanism (5) is arranged between the pressing plate (4) and the second end plate (22); the power mechanism (5) drives the pressing plate (4) to move closer to or away from the first end plate (21).

7. The electrolytic cell according to claim 5, characterized in that: The slot (1311) is an inverted trapezoidal structure, and the width of the slot (1311) at one end close to the pole frame (12) is greater than the width at one end away from the pole frame (12).

8. The electrolytic cell according to claim 1, characterized in that: The electrolytic cell further comprises a connection assembly (6) for connecting adjacent electrolytic units (1), wherein the connection assembly (6) comprises a connection sheet (61) and a fastener (62), wherein the connection sheet (61) is fixedly connected to the adjacent support plate (13) via the fastener (62), and each support plate (13) is respectively connected to adjacent support plates (13) in pairs via a plurality of the connection assemblies (6).

9. The electrolytic cell according to claim 4, characterized in that: In the electrolysis unit (1) close to the first end plate (21), the electrolysis unit (1) close to the second end plate (22), and the electrolysis unit (1) located in the middle, the pole frame (12) and the support plate (13) are both made of metal, and the pole frame (12) is connected to a conductive member (7); In other electrolytic units (1), a plurality of through holes (111) are provided at the connection between the electrode plate (11) and the electrode frame (12); the electrode frame (12) is integrally formed of a non-metallic material on the outer edge of the electrode plate (11) and fills the through holes (111); and the support plate (13) is made of a non-metallic material.

10. The electrolytic cell according to claim 5, characterized in that: The electrolytic cell further comprises a pad (8), a plurality of the pads (8) are arranged at fixed intervals, the guide rail (3) is laid on the pads (8) and connects all the pads (8), and the first end plate (21) and the second end plate (22) are respectively fixed on the pads (8) at both ends.

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