Electrolytic cell

Abstract

This utility model relates to the field of electrolysis equipment technology, specifically disclosing an electrolytic cell. The electrolytic cell includes a cell body and a cover plate. The top of the cell body has an opening, and a liquid sealing groove is provided on the cell body, surrounding the opening. The bottom of the cover plate has a raised structure surrounding the opening and interlocking with the liquid sealing groove. The liquid sealing groove is filled with a sealing liquid, which covers the bottom of the raised structure, facilitating the formation of a liquid sealing layer. This not only effectively prevents the leakage of acid mist from the inner cavity of the electrolytic cell but also has good adaptability, maintaining a sealing effect. The dual sealing method—the mechanical interlocking of the raised structure and the liquid sealing groove, and the liquid seal formed by the filling of the sealing liquid—improves sealing reliability and effectively prevents acid mist leakage from the opening.

Description

Technical Field

[0001] This utility model relates to the field of electrolysis equipment technology, and in particular to an electrolytic cell. Background Technology

[0002] Electrolyzers are indispensable equipment in the electrolysis process, widely used in various industrial fields such as electroplating, electrolytic refining, and water electrolysis for hydrogen production. In traditional electrolyzer designs, openings are typically provided for placing electrode plates and adding electrolyte. However, this opening design presents several problems, particularly regarding the generation of harmful gases such as acid fumes during electrolysis. These gases can easily escape from the openings, polluting the environment and threatening the health of operators.

[0003] In related technologies, some electrolytic cells are equipped with covers at their openings to prevent acid mist escape. However, these covers are usually simply placed over the openings, relying on their own weight for sealing. This method is ineffective, and acid mist can still leak from the gaps between the cover and the electrolytic cell. This leakage occurs not only during normal operation but is more pronounced when the internal pressure of the electrolytic cell changes. Another approach involves fixing the cover to the electrolytic cell with bolts or other fasteners. While this method can enhance the stability of the cover to some extent, the vibrations and thermal expansion generated during operation make it difficult to maintain a tight seal between the cover and the cell for extended periods. Acid mist can still leak through tiny gaps. Furthermore, using fasteners introduces inconveniences in actual operation, such as making the removal and installation of the cover cumbersome when replacing components like cathode plates, anode plates, and diaphragms, or performing other maintenance. Utility Model Content

[0004] The purpose of this invention is to provide an electrolytic cell to solve the problem of easy leakage of acid mist inside the electrolytic cell in related technologies.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model provides an electrolytic cell, the electrolytic cell comprising:

[0007] An electrolytic cell body, the top of which has an opening, and a liquid seal tank is provided on the electrolytic cell body, the liquid seal tank being arranged around the opening;

[0008] A cover plate is provided at the bottom of the cover plate to cover the opening. The cover plate is surrounded by the opening and is inserted into the liquid sealing groove. The liquid sealing groove is filled with sealing liquid and the sealing liquid covers the bottom end of the protrusion.

[0009] In one embodiment, when the protruding structure and the liquid seal tank are in the plugged-in state, the bottom of the protruding structure and the liquid seal tank are in clearance fit, and / or the protruding structure is attached to the top wall of the electrolytic cell body.

[0010] In one embodiment, the number of liquid seal grooves is at least two, and the at least two liquid seal grooves are nested in sequence. The number of protrusion structures is at least two, and the at least two protrusion structures are nested in sequence. The at least two liquid seal grooves and the at least two protrusion structures are inserted into each other in a one-to-one correspondence.

[0011] In one embodiment, the cover plate is provided with a plurality of first strip-shaped holes for inserting electrode plates, and the cover plate is provided with a plurality of second strip-shaped holes for laying diaphragms. The first strip-shaped holes and the second strip-shaped holes are arranged sequentially at intervals along the length direction of the cover plate, and a second strip-shaped hole is provided between any two adjacent first strip-shaped holes.

[0012] In one embodiment, the cover plate is provided with a first sealing element at the first strip hole, the first sealing element being able to seal the gap between the electrode plate and the first strip hole; and / or, the cover plate is provided with a second sealing element at the second strip hole, the second sealing element being able to seal the gap between the diaphragm and the second strip hole.

[0013] In one embodiment, the bottom of the cover plate is provided with a strip groove for connecting an anode plate, the anode plate being located below the cover plate.

[0014] In one embodiment, at least one first support member is provided on each side wall of the protrusion structure on both sides of the insertion direction, and the first support member abuts against the side wall of the liquid seal groove.

[0015] In one embodiment, the cover plate includes at least two sub-plates, which are arranged along the length of the cover plate, and any two adjacent sub-plates are either abutting or detachably connected.

[0016] In one embodiment, the electrolytic cell further includes a liquid replenishment mechanism and a liquid level sensor. The liquid level sensor is used to detect the liquid level in the liquid seal tank. The liquid replenishment mechanism includes a liquid replenishment pipe and a first flow control valve disposed on the liquid replenishment pipe. The liquid replenishment pipe is connected to the liquid seal tank.

[0017] In one embodiment, the electrolytic cell further includes an extraction mechanism and an acid mist concentration sensor. The extraction mechanism includes an extraction pipe and a second flow control valve disposed on the extraction pipe. The cover plate is connected to the electrolytic cell body to form an electrolytic chamber, and the extraction pipe is in communication with the electrolytic chamber.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention provides an electrolytic cell with a sealing liquid placed in its liquid sealing groove. After the protruding structure of the cover plate is inserted into the liquid sealing groove, the sealing liquid fills the space between the insertion surfaces of the protruding structure and the liquid sealing groove, with the sealing liquid covering the bottom of the protruding structure, forming a liquid sealing layer. This not only effectively prevents acid mist leakage from the inner cavity of the electrolytic cell but also has good adaptability; even under slight vibrations or pressure changes, the sealing liquid can automatically adjust to maintain the sealing effect. This embodiment improves sealing reliability and effectively prevents acid mist leakage from the opening through a dual sealing method of mechanical insertion between the protruding structure and the liquid sealing groove, and the liquid seal formed by filling with the sealing liquid. While ensuring a good sealing effect, it also facilitates the installation and removal of the cover plate. Attached Figure Description

[0020] Figure 1 This is an overall sectional view of the electrolytic cell in an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram illustrating one possible arrangement of the protruding structure and the liquid seal groove in an embodiment of this utility model.

[0022] Figure 3 This is a schematic diagram illustrating another way in which the protruding structure and the liquid seal groove are matched in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the front structure of the cover plate in an embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram of the back structure of the cover plate in an embodiment of this utility model.

[0025] In the picture:

[0026] 1. Electrolytic cell body; 11. Liquid seal tank;

[0027] 2. Cover plate; 21. Protruding structure; 22. First strip hole; 23. Second strip hole; 24. First support member; 25. Dividing plate; 26. Slot;

[0028] 3. Electrode plate. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] like Figures 1 to 3 As shown, an embodiment of this utility model provides an electrolytic cell, which includes an electrolytic cell body 1 and a cover plate 2. The electrolytic cell body 1 has an opening located at the top of the electrolytic cell body 1. A liquid sealing groove 11 is provided on the electrolytic cell body 1, surrounding the opening. The cover plate 2 is used to cover the opening, and a protruding structure 21 is provided at the bottom of the cover plate 2. The protruding structure 21 surrounds the opening and is inserted into the liquid sealing groove 11. The liquid sealing groove 11 is filled with a sealing liquid, and the sealing liquid covers the bottom end of the protruding structure 21.

[0034] In use, a sealing liquid can be placed in the liquid seal tank 11. After the protruding structure 21 of the cover plate 2 is inserted into the liquid seal tank 11, the sealing liquid fills the space between the insertion mating surface of the protruding structure 21 and the insertion mating surface of the liquid seal tank 11, and the sealing liquid covers the bottom end of the protruding structure 21, forming a liquid sealing layer. The liquid sealing layer can liquid seal the part of the insertion mating surface between the protruding structure 21 and the liquid seal tank 11, which can not only effectively prevent the leakage of acid mist in the inner cavity of the electrolytic cell body 1, but also has good adaptability. Even under slight vibration or pressure changes, the sealing liquid can automatically adjust to maintain the sealing effect. This embodiment improves the sealing reliability and effectively prevents acid mist from leaking from the opening through the dual sealing method of the mechanical insertion mating of the protruding structure 21 and the liquid seal tank 11 and the liquid seal formed by filling with sealing liquid. While ensuring the sealing effect, it also facilitates the installation and removal of the cover plate 2, allowing users to easily maintain the internal components of the electrolytic cell, and solving the problem of easy leakage of acid mist in the electrolytic cell in related technologies.

[0035] In this embodiment, when the protruding structure 21 and the liquid seal groove 11 are inserted, a gap for filling with sealing liquid is provided between the insertion mating surface of the protruding structure 21 and the insertion mating surface of the liquid seal groove 11. The insertion mating surface of the protruding structure 21 located on the same cross-section can partially form a gap with the insertion mating surface of the liquid seal groove 11. For example, a portion of the sidewalls of the protruding structure 21 on both sides of the insertion direction can abut against the groove wall of the liquid seal groove 11, which facilitates limiting the insertion position of the protruding structure 21 in the liquid seal groove 11. The other portion of the sidewalls of the protruding structure 21 on both sides of the insertion direction maintains a gap with the groove wall of the liquid seal groove 11, which facilitates filling with sealing liquid and forming a liquid seal. Specifically, the convex top and the portion of the sidewall near the convex top of the protruding structure 21 can maintain a gap with the groove wall of the liquid seal groove 11, and the portion of the sidewall away from the convex top of the protruding structure 21 can abut against the groove wall of the liquid seal groove 11 to limit both. Figure 3 As shown, the cross-section of the liquid seal groove 11 can be a dovetail shape that is narrow at the top and wide at the bottom, and the cross-section of the protruding structure 21 can be rectangular, so that liquid sealing can be performed at the same time as insertion.

[0036] Optionally, the liquid seal tank 11 can be directly set on the top of the electrolytic cell body 1, or the electrolytic cell body 1 includes a tank wall and an annular support set on the inner side of the tank wall, and the liquid seal tank 11 can be set on the top of the annular support. The annular support can provide a larger installation space for the liquid seal tank 11 and reduce the requirement for the thickness of the tank wall itself.

[0037] In some embodiments, the liquid seal groove 11 is a continuous annular groove, and the protrusion structure 21 is a continuous annular protrusion. The continuous annular protrusion and the continuous annular groove are interlocked. In this embodiment, the continuous annular interlocking structure formed by the continuous annular protrusion and the continuous annular groove is adopted, so that the sealing liquid can form a continuous sealing ring around the entire opening, effectively preventing acid mist from leaking from the circumferential position of the opening, and the sealing effect is good.

[0038] In some embodiments, when the protruding structure 21 and the liquid sealing groove 11 are in the plugged-in state, the bottom of the protruding structure 21 and the liquid sealing groove 11 are fitted with a clearance, which facilitates increasing the contact area between the protruding structure 21 and the sealing liquid. And / or, the protruding structure 21 is attached to the top wall of the electrolytic cell body 1. On the basis of liquid sealing, the attachment of the protruding structure 21 to the top wall of the electrolytic cell body 1 can form a further seal, further improving the sealing effect.

[0039] Optionally, the raised structure 21 and the top wall of the electrolytic cell body 1 can be magnetically connected, which improves the sealing effect, enhances connection stability, reduces connection offset, and facilitates the disassembly and assembly of the cover plate 2.

[0040] In some other embodiments, the liquid seal tank 11 may include at least two sub-slots, which are arranged around the opening. The protruding structure 21 includes at least two protruding segments, which are arranged around the opening. The protruding segments are respectively inserted into the corresponding sub-slots to form at least two sealing segments. Adjacent sealing segments may be arranged alternately around the opening or partially staggered inside and outside. The bottom of the cover plate 2 abuts against the top of the electrolytic cell body 1. The abutment seal between the cover plate 2 and the electrolytic cell body 1, together with the multiple liquid seal segments between the protruding sealing end and the sub-slots, can also have a certain sealing effect.

[0041] In some embodiments, the number of liquid seal grooves 11 is at least two, and the at least two liquid seal grooves 11 are nested in sequence. The number of protrusion structures 21 is at least two, and the at least two protrusion structures 21 are nested in sequence. The at least two liquid seal grooves 11 and the at least two protrusion structures 21 are inserted one-to-one to form a multi-layer seal. Each group of protrusion structures 21 and liquid seal grooves 11 can form an independent sealing ring. Multiple sealing rings cooperate with each other and work together. Even if a small leak occurs in one group of seals, the other groups of seals can still play a blocking role, which greatly reduces the risk of acid mist overflow and can improve the overall sealing effect.

[0042] In this embodiment, two adjacent liquid seal tanks 11 can be interconnected to facilitate mutual replenishment of sealing liquid and maintain the stability of the sealing liquid surface. The insertion and mating height of at least two liquid seal tanks 11 with the protruding structure 21 can be the same, or it can gradually increase from the inside to the outside.

[0043] like Figures 1 to 5As shown, in some embodiments, the cover plate 2 is provided with a plurality of first strip holes 22 for inserting the electrode plate 3. The electrode plate 3 can be either an anode plate or a cathode plate. The first strip holes 22 can be flexibly installed for the cathode plate or the anode plate according to the needs of electrolysis operation. The cover plate 2 is provided with a plurality of second strip holes 23 for laying the diaphragm. The first strip holes 22 and the second strip holes 23 are arranged sequentially at intervals along the length direction of the cover plate 2, and a second strip hole 23 is provided between any two adjacent first strip holes 22, which can provide an insertion and installation position for the electrode plate 3 and the diaphragm. Adjacent electrode plates 3 can be separated by the diaphragm, which also facilitates the disassembly and assembly of the electrode plate 3 and the diaphragm.

[0044] In this embodiment, the second strip-shaped hole 23 is provided with slots 26 on both sides of the cover plate 2 in the width direction. A bracket is provided on the diaphragm, and the bracket is engaged with the slots 26. The electrolytic cell also includes a feed pipe for conveying electrolyte or other solutions. An independent feed port can be provided on the cover plate 2 for connecting to the feed pipe. The feed port can be located on the diaphragm near the cathode plate. By providing the first strip-shaped hole 22 and the second strip-shaped hole 23, the electrode plates 3 can be separated from each other, reducing the spillage of the feed solution to both sides of the diaphragm.

[0045] In some embodiments, the cover plate 2 is provided with a first sealing element at the first slot 22. The first sealing element can seal the gap between the electrode plate 3 and the first slot 22, thereby reducing acid mist leakage from the gap between the first slot 22 and the electrode plate 3, improving sealing performance, and reducing the machining accuracy requirements of the mating surfaces of the first slot 22 and the electrode plate 3. And / or, the cover plate 2 is provided with a second sealing element at the second slot 23. The second sealing element can seal the gap between the diaphragm and the second slot 23, thereby reducing acid mist leakage from the gap between the second slot 23 and the diaphragm, improving sealing performance, and reducing the machining accuracy requirements of the mating surfaces of the second slot 23 and the diaphragm.

[0046] In this embodiment, the first sealing element and the second sealing element may be, but are not limited to, elastic sealing rings, elastic sealing gaskets, or elastic sealing strips, and can be installed at the corresponding first strip hole 22 or second strip hole 23 for sealing.

[0047] In some embodiments, the bottom of the cover plate 2 is provided with a strip groove for connecting the anode plate. The anode plate is located below the cover plate 2, and acid mist easily forms at the anode plate. The anode plate can be optionally installed below the cover plate 2 through the strip groove, which helps to reduce the leakage of acid mist from the installation position of the cover plate 2 and the anode plate. Of course, in this embodiment, the cover plate 2 may also be provided with a first strip groove and a second strip groove. The first strip groove can be used for the insertion of the cathode plate, and the second strip groove can be used for the installation of the diaphragm, which facilitates the disassembly and assembly of the cathode plate and the diaphragm.

[0048] like Figures 1 to 2As shown, in some embodiments, at least one first support member 24 is provided on the sidewalls of the protruding structure 21 on both sides of the insertion direction. The first support member 24 abuts against the sidewall of the liquid sealing groove 11. On the same cross-section where the protruding structure 21 and the liquid sealing groove 11 are inserted and matched, the two sides of the protruding structure 21 can be fixed to the liquid sealing groove 11 by the first support member 24, and a gap for filling with sealing liquid can also be formed. This makes it easier to increase the liquid sealing area of ​​the protruding structure 21 and the liquid sealing groove 11 while maintaining the insertion stability of the protruding structure 21 and the liquid sealing groove 11.

[0049] like Figures 1 to 4 As shown, in some embodiments, the cover plate 2 includes at least two sub-plates 25, which are arranged along the length of the cover plate 2. Any two adjacent sub-plates 25 are connected by abutment or detachable connection. When the length of the electrolytic cell is long, the cover plate 2 can be set as an assembly structure of at least two sub-plates 25 to reduce leakage caused by easy deformation or uneven installation due to the overall length of the cover plate 2. Each sub-plate 25 can be installed more tightly with the electrolytic cell body to improve the sealing effect. Furthermore, the adjacent sub-plates 25 are connected by abutment or detachable connection, making installation and disassembly convenient.

[0050] Optionally, any two adjacent panels 25 can be elastically abutted to improve sealing. For example, an elastic sealing gasket can be provided between any two adjacent panels 25. Alternatively, the connection method between any two adjacent panels 25 can be, but is not limited to, magnetic connection, snap-fit, or plug-in connection.

[0051] In some embodiments, the electrolytic cell further includes a replenishment mechanism and a level sensor. The level sensor is used to detect the liquid level in the liquid sealing tank 11. The detection end of the level sensor can be located inside the liquid sealing tank. The replenishment mechanism includes a replenishment pipe and a first flow control valve disposed on the replenishment pipe. The replenishment pipe is connected to the liquid sealing tank 11. With this configuration, the level sensor can detect the liquid level height in the liquid sealing tank 11 in real time. The first flow control valve is communicatively connected to the level sensor. When the liquid level height is lower than a preset value, the level sensor sends a signal to the replenishment mechanism. After receiving the signal, the first flow control valve in the replenishment mechanism automatically opens the replenishment pipe to replenish the sealing liquid in the liquid sealing tank 11 until the liquid level returns to the preset value. The automatic replenishment mechanism ensures that there is always sufficient sealing liquid in the liquid sealing tank 11. Even if the sealing liquid decreases due to evaporation or leakage, it can be replenished in time, thereby maintaining a stable liquid sealing effect, effectively preventing acid mist leakage, and improving the reliability of the liquid seal.

[0052] In this embodiment, the replenishment pipe can be connected to a storage container for storing the sealing liquid, or it can be connected to a device for generating the sealing liquid. The sealing liquid can be, but is not limited to, water or liquid glue. Optionally, the replenishment pipe can also communicate with the inner cavity of the electrolytic cell body 1. In some application scenarios, the replenishment pipe can introduce electrolyte as the sealing liquid.

[0053] In some embodiments, the electrolytic cell further includes an extraction mechanism and an acid mist concentration sensor. The extraction mechanism includes an extraction pipe and a second flow control valve disposed on the extraction pipe. The cover plate 2 is connected to the electrolytic cell body 1 to form an electrolytic chamber. The extraction pipe can communicate with the electrolytic chamber. The detection end of the acid mist concentration sensor can be disposed inside the electrolytic chamber. The second flow control valve is communicatively connected to the acid mist concentration sensor. The acid mist concentration sensor can monitor the acid mist concentration in the electrolytic chamber in real time and transmit the data to the extraction mechanism. The second flow control valve in the extraction mechanism adjusts its valve opening according to the signal from the acid mist concentration sensor, thereby adjusting the extraction volume. This helps to keep the acid mist concentration in the electrolytic chamber within a safe range, responds promptly to changes in acid mist concentration, facilitates effective control of acid mist in the electrolytic cell, and reduces the risk of acid mist leakage.

[0054] The extraction pipe is spaced apart from the liquid surface of the electrolytic cell body 1, and the extraction port of the extraction pipe can be located 60 mm above the liquid surface of the electrolytic cell body 1. The extraction mechanism can be a blower or an air pump.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electrolytic cell characterized in that, The electrolytic cell includes: An electrolytic cell body (1) has an opening at the top and a liquid seal tank (11) is provided on the electrolytic cell body (1) and the liquid seal tank (11) is arranged around the opening; A cover plate (2) is used to cover the opening, and a protruding structure (21) is provided at the bottom of the cover plate (2). The protruding structure (21) is arranged around the opening and is inserted into the liquid sealing groove (11). The liquid sealing groove (11) is filled with sealing liquid and the sealing liquid covers the bottom end of the protruding structure (21).

2. The electrolytic cell of claim 1, wherein, In the plugged-in state, the protruding structure (21) and the liquid sealing groove (11) are in a clearance fit at the bottom of the protruding structure (21) and the liquid sealing groove (11), and / or the protruding structure (21) is attached to the top wall of the electrolytic cell body (1).

3. The electrolytic cell of claim 1, wherein, The number of liquid seal grooves (11) is at least two, and the at least two liquid seal grooves (11) are nested in sequence. The number of protrusion structures (21) is at least two, and the at least two protrusion structures (21) are nested in sequence. The at least two liquid seal grooves (11) and the at least two protrusion structures (21) are inserted into each other in a one-to-one correspondence.

4. The electrolytic cell according to claim 1, characterized in that, The cover plate (2) is provided with a plurality of first strip holes (22) for inserting the electrode plate (3), and the cover plate (2) is provided with a plurality of second strip holes (23) for laying the diaphragm. The first strip holes (22) and the second strip holes (23) are arranged sequentially at intervals along the length direction of the cover plate (2), and a second strip hole (23) is provided between any two adjacent first strip holes (22).

5. The electrolytic cell according to claim 4, characterized in that, The cover plate (2) is provided with a first sealing element at the first strip hole (22), which can seal the gap between the electrode plate (3) and the first strip hole (22); and / or, the cover plate (2) is provided with a second sealing element at the second strip hole (23), which can seal the gap between the diaphragm and the second strip hole (23).

6. The electrolytic cell according to claim 1 or 4, characterized in that, The bottom of the cover plate (2) is provided with a strip groove for connecting the anode plate, and the anode plate is located below the cover plate (2).

7. The electrolytic cell according to any one of claims 1-5, characterized in that, The protruding structure (21) is provided with at least one first support member (24) on both sides of the side wall in the insertion direction, and the first support member (24) abuts against the side wall of the liquid seal groove (11).

8. The electrolytic cell according to any one of claims 1-5, characterized in that, The cover plate (2) includes at least two sub-plates (25), which are arranged along the length of the cover plate (2), and any two adjacent sub-plates (25) are either abutting or detachably connected.

9. The electrolytic cell according to any one of claims 1-5, characterized in that, The electrolytic cell also includes a liquid replenishment mechanism and a liquid level sensor. The liquid level sensor is used to detect the liquid level in the liquid seal tank (11). The liquid replenishment mechanism includes a liquid replenishment pipe and a first flow control valve installed on the liquid replenishment pipe. The liquid replenishment pipe is connected to the liquid seal tank (11).

10. The electrolytic cell according to any one of claims 1-5, characterized in that, The electrolytic cell also includes an air extraction mechanism and an acid mist concentration sensor. The air extraction mechanism includes an air extraction pipe and a second flow control valve installed on the air extraction pipe. The cover plate (2) is connected to the electrolytic cell body (1) to form an electrolytic chamber. The air extraction pipe is connected to the electrolytic chamber.

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