Electrolytic bath
By setting a single tank in the electrolytic cell and using a diversion module with the same structure, the problems of high production costs and assembly difficulty caused by the structural differences of the diversion plates in the prior art are solved, and the generalization of the diversion plates and the production cost are realized. reduce.
Patent Information
- Application Number
- CN202420785608.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-15
AI Technical Summary
In the existing stacked PEM electrolytic cell, due to the different flow directions of water and hydrogen on both sides of the membrane electrode, the structure of the deflector is different, which increases production cost and assembly difficulty.
Design an electrolytic cell, by setting a single groove between the electrode plates and using the same structure on both sides of the membrane electrode of the single groove, the generalization of the flow guide plate is achieved, reducing the types and zero assembly of the flow guide plates part.
It reduces the complexity of the production and assembly of the deflector plate, improves production efficiency, and reduces the production cost of the electrolytic cell.
Smart Images
Figure CN222226579U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of hydrogen preparation, and in particular to an electrolyzer. Background Art
[0002] Stacked PEM electrolyzers are widely used in the field of hydrogen production. In the existing stacked PEM electrolyzer structure, a guide plate is arranged between the electrode plate and the membrane electrode to guide water and generated hydrogen. Since the flow directions of water and hydrogen on both sides of the membrane electrode are different, the structures of the guide plates on both sides of the existing membrane electrode are different. Utility Model Content
[0003] The purpose of the embodiment of the utility model is to provide an electrolytic cell, which optimizes the structure of the guide plate so that the guide plate can be universal in the entire electrolytic cell, thereby reducing the mold opening cost for the guide plate, simplifying the assembly difficulty of the electrolytic cell, and further reducing the production cost of the electrolytic cell, thereby solving the technical problem of high production cost of existing PEM electrolytic cells to a certain extent.
[0004] To achieve the above objectives, this application adopts the following technical solutions:
[0005] An electrolytic cell comprising:
[0006] Electrode plates, including anode plates and cathode plates;
[0007] A single tank is arranged between the anode plate and the cathode plate; the single tank comprises two flow guide modules and a membrane electrode sandwiched between the two flow guide modules; the flow guide module comprises a flow guide plate, a first sealing ring, a second sealing ring and a diffusion layer, the flow guide plate is centrally provided with a diffusion cavity, a first through hole and a second through hole separated from each other, and the diffusion layer is arranged in the diffusion cavity; the flow guide plate has a first arrangement area and a second arrangement area respectively located on two opposite sides of the diffusion cavity, the first arrangement area is provided with a first through hole and a second through hole, the second arrangement area is provided with a first through hole and a second through hole, and between the two flow guide modules, the first through hole on any of the flow guide plates is aligned with the second through hole on the other flow guide module; the flow guide plate has a first surface facing away from the membrane electrode and a second surface facing the membrane electrode, the first surface is provided with a connecting groove connecting the first through hole and the diffusion cavity; the first sealing ring is installed on the first surface, and the second sealing ring is installed on the second surface.
[0008] Optionally, the first through hole and the second through hole are both waist-shaped long holes.
[0009] Optionally, support ribs contacting the electrode plate are provided in the connecting groove.
[0010] Optionally, the first sealing ring includes a first ring body and two second ring bodies connected to the first ring body, the first ring body is arranged around the diffusion cavity and the first through hole; the two second ring bodies are respectively arranged around the two second through holes.
[0011] Optionally, a first installation groove adapted to the first sealing ring is provided on the guide plate and located on the first surface, and the first sealing ring is embedded in the first installation groove.
[0012] Optionally, the second sealing ring includes a connected third ring body and two fourth ring bodies and two fifth ring bodies connected to the third ring body, the third ring body is arranged around the diffusion cavity, the two fourth ring bodies are respectively arranged around the two first through holes, and the two fifth ring bodies are respectively arranged around the two second through holes.
[0013] Optionally, a second mounting groove adapted to the second sealing ring is provided on the guide plate and located on the second surface, and the second sealing ring is embedded in the second mounting groove.
[0014] Optionally, the first sealing ring and the second sealing ring are both made of food-grade fluororubber.
[0015] Optionally, the electrode plate also includes an intermediate electrode plate, there are at least two single slots and they are stacked, the intermediate electrode plate is arranged between two adjacent single slots to separate them, the anode plate and the cathode plate are respectively located at the two outermost sides of all the single slots; the intermediate electrode plate is provided with a connecting hole for connecting the water channels of the two connected single slots.
[0016] Optionally, the diffusion layer includes a titanium mesh and a titanium felt, and the titanium felt is arranged close to the membrane electrode.
[0017] The beneficial effects of the present application are as follows: the utility model provides an electrolytic cell, in which a single cell is arranged between the electrode plates. On the basis of meeting the basic requirements of the normal flow guide function, the flow guide module structures on both sides of the membrane electrode of the single cell are the same. In the production stage, only one type of flow guide module needs to be produced. Therefore, only one set of molds needs to be developed in the preparation stage for the production of the guide plates, and the guide plates are made universal. During assembly, the types of assembly parts are reduced, the difficulty of assembly is reduced, the assembly efficiency is improved, and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The present application is further described in detail below based on the drawings and embodiments.
[0019] Figure 1 This is a schematic diagram of the structure of the cathode side of the electrolytic cell described in the embodiment of the present application;
[0020] Figure 2 This is a schematic diagram of the structure of the anode side of the electrolytic cell described in the embodiment of the present application;
[0021] Figure 3 This is an explosion diagram of the electrolytic cell described in the embodiment of the present application;
[0022] Figure 4 This is a schematic diagram of the water flow direction in a single tank close to the anode plate in the electrolytic cell according to the embodiment of the present application;
[0023] Figure 5 A schematic diagram of the exhaust gas flow direction in a single cell close to the anode plate in the electrolytic cell according to an embodiment of the present application;
[0024] Figure 6 This is a schematic diagram of the water flow direction in a single tank close to the cathode plate in the electrolytic cell according to an embodiment of the present application;
[0025] Figure 7 This is a schematic diagram of the exhaust gas flow direction in a single cell close to the cathode plate in the electrolytic cell according to an embodiment of the present application;
[0026] Figure 8 This is a schematic diagram of the structure of the flow diversion module described in the embodiment of the present application;
[0027] Fig. 9 This is one of the exploded schematic diagrams of the flow diversion module described in the embodiment of the present application;
[0028] Fig.10 This is the second explosion diagram of the diversion module described in the embodiment of the present application.
[0029] In the figure:
[0030] 1. electrode plate; 11. anode plate; 12. cathode plate; 13. intermediate electrode plate; 131. connecting hole; 2. single slot; 21. guide module; 211. guide plate; 2111. first through hole; 2112. second through hole; 2113. diffusion cavity; 2114. connecting groove; 2115. supporting rib; 2116. first mounting groove; 2117. second mounting groove; 212. diffusion layer; 2121. titanium mesh; 2122. titanium felt; 213. first sealing ring; 2131. first circle; 2132. second circle; 214. second sealing ring; 2141. third circle; 2142. fourth circle; 2143. fifth circle; 22. membrane electrode; 3. anode end cap; 31. water inlet; 32. drain outlet; 33. first exhaust port; 4. cathode end cap; 41. second exhaust port. DETAILED DESCRIPTION
[0031] In order to make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.
[0032] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0033] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0034] Stacked PEM electrolyzers are widely used in the field of hydrogen production. In the existing stacked PEM electrolyzer structure, a guide plate is arranged between the electrode plate and the membrane electrode to guide water and generated hydrogen. Since the flow directions of water and hydrogen on both sides of the membrane electrode are different, the structures of the guide plates on both sides of the existing membrane electrode are different.
[0035] Obviously, when using guide plates with different structures in the electrolytic cell, at least two different molds need to be opened during the guide plate production stage, and the mold opening cost is high. During the assembly stage, the selection of guide plates needs to be identified, and there are many types of assembled parts, which makes the assembly difficult.
[0036] like Figure 1-3As shown, this embodiment provides an electrolytic cell, including an electrode plate 1, a single cell 2, an anode end cap 3 and a cathode end cap 4, the anode end cap 3 and the cathode end cap 4 are respectively located at the outermost sides of the entire electrolytic cell, the electrode plate 1 includes an anode plate 11 and a cathode plate 12, the anode plate 11 is located on the inner side of the anode end cap 3, and the cathode plate 12 is located on the inner side of the cathode end cap 4. The single cell 2 is arranged between the anode plate 11 and the cathode plate 12.
[0037] The single slots 2 may be arranged in one group or in multiple groups. When only one group of single slots 2 is arranged, the two sides of the group of single slots 2 are respectively in contact with the anode plate 11 and the cathode plate 12; when multiple groups of single slots 2 are arranged, an intermediate electrode plate 13 is arranged between two adjacent groups of single slots 2, and the two adjacent groups of single slots 2 share one intermediate electrode plate 13. Figure 1 Taking the angle shown in the figure, the anode plate 11 is located at the bottom side of the electrolytic cell, and the cathode plate 12 is located at the top side of the electrolytic cell. In each single cell 2, there is an electrolytic cell. For the single cell 2 close to the anode plate 11 below, the middle electrode plate 13 above it is the cathode of the single cell 2; for the single cell 2 close to the cathode plate 12 above, the middle electrode plate 13 below it is the anode of the single cell 2.
[0038] In order to achieve water inlet and outlet and exhaust, in one embodiment, refer to Figure 1-2 The anode end cap 3 is provided with a water inlet 31, a water outlet 32 and a first exhaust port 33. To achieve water and ventilation, the anode plate 11 is provided with holes connected to each port; the cathode end cap 4 is provided with a second exhaust port 41, and the cathode plate 12 is provided with a hole connected to the exhaust port. During operation, electrolyzed water enters the electrolytic cell from the water inlet 31 and diffuses to the two single cells 2 respectively; the electrolyzed water is electrolyzed in the two single cells 2 to produce hydrogen and oxygen-rich wastewater. The hydrogen generated by the upper single cell 2 is directly discharged from the second exhaust port 41, and the hydrogen generated by the lower single cell 2 is discharged from the first exhaust port 33. The oxygen-rich wastewater produced by the two single cells 2 is discharged from the drain port 32 after being converged.
[0039] In order to simplify the structure of the single slot 2 and reduce the production cost, in this embodiment, Figure 8-10The single tank 2 includes two flow guide modules 21 and a membrane electrode 22 sandwiched between the two flow guide modules 21; the flow guide module 21 includes a flow guide plate 211, a first sealing ring 213, a second sealing ring 214 and a diffusion layer 212, and the flow guide plate 211 is centrally provided with a diffusion cavity 2113, a first through hole 2111 and a second through hole 2112 separated from each other, and the diffusion layer 212 is arranged in the diffusion cavity 2113; the flow guide plate 211 has a first arrangement area and a second arrangement area respectively located on two opposite sides of the diffusion cavity 2113, and the first arrangement area is provided with a first through hole 2111 and a second through hole 2112 112, a first through hole 2111 and a second through hole 2112 are provided on the second arrangement area, and between the two guide modules 21, the first through hole 2111 on any one of the guide plates 21 is aligned with the second through hole 2112 on the other guide module 21; the guide plate 211 has a first surface facing away from the membrane electrode 22 and a second surface facing the membrane electrode 22, and a connecting groove 2114 connecting the first through hole 2111 and the diffusion cavity 2113 is provided on the first surface; the first sealing ring 213 is installed on the first surface, and the second sealing ring 214 is installed on the second surface.
[0040] Specifically, the first through holes 2111 and the second through holes 2112 of the guide plates 211 disposed at different positions have different functions. In this solution, two groups of first through holes 2111 and second through holes 2112 are disposed symmetrically on both sides. On the two guide plates 211, the first through holes 2111 on any guide plate 211 are aligned with the second through holes 2112 on the other guide plate 211, so that the normal flow guiding requirements for gas and water can be met.
[0041] Specifically, refer to Figure 4 , the guide plate 211 near the anode plate 11 is referred to as guide plate a, and the guide plate 211 near the intermediate electrode plate 13 is referred to as guide plate b. The inlet water enters from the first through hole 2111 on the left side of the guide plate a, and enters the diffusion cavity 2113 through the connecting groove 2114 on the side of the first through hole 2111. The water can pass through the membrane electrode 22 to contact the intermediate electrode plate 13 to be electrolyzed; the oxygen-rich wastewater generated after electrolysis near the anode plate 11 enters the first through hole 2111 through the connecting groove 2114 on the left side of the guide plate a and is then discharged. Figure 5 At this time, the intermediate electrode plate 13 acts as a cathode, generating hydrogen above the membrane electrode 22. The hydrogen enters the first through hole 2111 through the connecting groove 2114 on the right side of the b guide plate, and is then discharged through the second through hole 2112 on the right side of the a guide plate.
[0042] Reference Figure 6, the guide plate 211 near the middle electrode plate 13 is called the c guide plate, and the guide plate 211 near the cathode plate 12 is called the d guide plate. The incoming water enters the first through hole 2111 on the left side of the a guide plate and is split. A part of it passes through the second through hole 2112 on the left side of the b guide plate and the middle electrode plate 13 in turn, and then enters the first through hole 2111 on the left side of the c guide plate, and enters the diffusion cavity 2113 through the connecting groove 2114. The water can pass through the membrane electrode 22 to contact the cathode plate 12 and be electrolyzed; the oxygen-rich wastewater generated after electrolysis near the middle electrode plate 13 enters the first through hole 2111 through the connecting groove 2114 on the left side of the c guide plate, and then passes through the middle electrode plate 13, the second through hole 2111 on the right side of the b guide plate, and the first through hole 2112 on the right side of the a guide plate in turn to be discharged. Refer to Figure 7 The hydrogen generated above the membrane electrode 22 enters the first through hole 2111 through the connecting groove 2114 on the right side of the guide plate d and is discharged.
[0043] As can be seen from the above, the present solution uses guide plates 211 with the same structure on both sides of the membrane electrode 22, which can also meet the basic requirements of the normal guide function.
[0044] In summary, the electrolytic cell of the present embodiment is provided with a single tank 2 between the electrode plates 1. On the basis of satisfying the basic requirements of the normal flow guiding function, the flow guiding modules 21 on both sides of the membrane electrode 22 of the single tank 2 have the same structure. In the production stage, only one type of flow guiding module 21 needs to be produced. Therefore, only one set of molds needs to be developed in the preparation stage for the production of the flow guiding plate 211. In addition, the flow guiding plate 211 is made universal, which reduces the types of assembly parts during assembly, reduces the difficulty of assembly, improves assembly efficiency, and thus reduces production costs.
[0045] In one embodiment, both the first through hole 2111 and the second through hole 2112 are waist-shaped long holes.
[0046] The first through hole 2111 and the second through hole 2112 are both configured as waist-shaped long holes, which can effectively expand the setting width of the connecting groove 2114 and increase the flow area to increase the water flow rate and meet the demand for providing sufficient water for electrolysis.
[0047] In one embodiment, referring to Fig.10 The connecting groove 2114 is provided with a supporting rib 2115 contacting the electrode plate 1 .
[0048] Specifically, the electrolytic cell is in a high-pressure environment, and the connection groove 2114 will weaken the strength of the guide plate 211 in this area, which may cause deformation. A support rib 2115 is provided in the connection groove 2114. After installation, the support rib 2115 will contact the adjacent electrode plate 1, which can prevent the guide plate 211 from deforming in the connection groove 2114 area.
[0049] In one embodiment, the first sealing ring 213 includes a first ring body 2131 and two second ring bodies 2132 connected to the first ring body 2131, the first ring body 2131 is arranged around the diffusion cavity 2113 and the first through hole 2111; the two second ring bodies 2132 are respectively arranged around the two second through holes 2112.
[0050] The first sealing ring 213 is provided with a first ring body 2131 to surround the diffusion cavity 2113 and the first through hole 2111, so as to seal the outer periphery of the diffusion cavity 2113 and the first through hole 2111 without hindering the conduction between the diffusion cavity 2113 and the first through hole 2111; a second ring body 2132 separated from the first ring body 2131 is provided to surround the second through hole 2112, so as to seal the outer periphery of the second through hole 2112. In addition to achieving external sealing to prevent the electrolytic cell from leaking water or air outward, this sealing structure can also achieve internal sealing to prevent leakage between the second through hole 2112 and the diffusion cavity 2113.
[0051] In one embodiment, a first installation groove 2116 adapted to the first sealing ring 213 is provided on the guide plate 211 and located on the first surface, and the first sealing ring 213 is embedded in the first installation groove 2116 .
[0052] Providing the first installation groove 2116 to install the first sealing ring 213 can improve the reliability of the installation of the first sealing ring 213 and optimize the sealing performance.
[0053] In one embodiment, the second sealing ring 214 includes a connected third ring body 2141 and two fourth ring bodies 2142 and two fifth ring bodies 2143 connected to the third ring body 2141, the third ring body 2141 is arranged around the diffusion cavity 2113, the two fourth ring bodies 2142 are respectively arranged around the two first through holes 2111, and the two fifth ring bodies 2143 are respectively arranged around the two second through holes 2112.
[0054] Similarly, the second sealing ring 214 is configured to form a plurality of spaced ring bodies to surround and seal the plurality of cavities. In addition to achieving external sealing to prevent the electrolytic cell from leaking water or air, it can also achieve internal sealing to prevent leakage between the first through hole 2111, the second through hole 2112 and the diffusion cavity 2113.
[0055] In one embodiment, the guide plate 211 is provided with a second mounting groove 2117 located on the second surface and matched with the second sealing ring 214 , and the second sealing ring 214 is embedded in the second mounting groove 2117 .
[0056] Similarly, providing the second installation groove 2117 to install the second sealing ring 214 can improve the reliability of the installation of the second sealing ring 214 and optimize the sealing performance.
[0057] In one embodiment, the first sealing ring 213 and the second sealing ring 214 are both made of food-grade fluororubber.
[0058] The first sealing ring 213 and the second sealing ring 214 are made of food-grade fluororubber material, which has the advantages of good performance stability, strong acid and alkali resistance, and high safety level.
[0059] In one embodiment, the electrode plate 1 also includes an intermediate electrode plate 13, there are at least two single slots 2 and they are stacked, the intermediate electrode plate 13 is set between two adjacent single slots 2 to separate them, the anode plate 11 and the cathode plate 12 are respectively located at the two outermost sides of all the single slots 2; the intermediate electrode plate 13 is provided with a connecting hole 131 that connects the water paths of the two connected single slots 2.
[0060] By stacking multiple groups of single tanks 2, the electrolysis efficiency can be improved and the amount of hydrogen generated can be increased.
[0061] In one embodiment, the diffusion layer 212 includes a titanium mesh 2121 and a titanium felt 2122 , and the titanium felt 2122 is disposed close to the membrane electrode 22 .
[0062] The titanium felt 2122 is a flexible body with dense pores that allow water to penetrate; the surface of the titanium felt 2122 is soft and can directly contact the membrane electrode 22 without puncturing the membrane electrode 22; the titanium mesh 2121 is a rigid body and can provide support for the titanium felt 2122 to maintain the stability of the membrane electrode 22 and the titanium felt 2122.
[0063] The titanium felt 2122 may also be replaced by a porous titanium plate or other water-permeable structures with a soft surface, such as stainless steel felt.
[0064] The anode end cap 3 and the cathode end cap 4 are made of materials with good rigidity and good heat dissipation, such as aluminum alloy, stainless steel, special plastics or other special materials, to ensure that the internal electrodes can be flattened and tightened, and heat conduction and heat dissipation are effective; screw-nut tightening and fixing are adopted, and the screws are evenly arranged on the four sides or circumference of the end cap to make the force uniform, ensure the sealing, and are not easy to loosen after tightening, and can be equipped with one or more spring washers. The screw sleeve is covered with an insulating sleeve to prevent the screw from contacting the electrode and causing a short circuit. An insulating gasket is set between the end cap and the electrode for isolation.
[0065] The guide plate 211 is made of a special plastic material that is resistant to acid, alkali and high temperature.
[0066] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., and other directions or positional relationships are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of this application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0067] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.
[0068] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
[0069] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the scope of protection of the present application in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the present application without creative work, and these methods will fall within the scope of protection of the present application.
Claims
1. An electrolytic cell, characterized in that: include: An electrode plate (1), comprising an anode plate (11) and a cathode plate (12); A single cell (2) is arranged between the anode plate (11) and the cathode plate (12); the single cell (2) comprises two flow guide modules (21) and a membrane electrode (22) sandwiched between the two flow guide modules (21); the flow guide module (21) comprises a flow guide plate (211), a first sealing ring (213), a second sealing ring (214) and a diffusion layer (212); the flow guide plate (211) is centrally provided with a diffusion cavity (2113), a first through hole (2111) and a second through hole (2112) which are separated from each other; the diffusion layer (212) is arranged in the diffusion cavity (2113); the flow guide plate (211) has a first arrangement area and a second arrangement area which are respectively located on two opposite sides of the diffusion cavity (2113); the first arrangement area is provided with a The first through hole (2111) and the second through hole (2112) are provided on the second arrangement area, and between the two guide modules (21), the first through hole (2111) on any one of the guide plates (211) is aligned with the second through hole (2112) on the other guide module (21); the guide plate (211) has a first surface facing away from the membrane electrode (22) and a second surface facing the membrane electrode (22), and a connecting groove connecting the first through hole (2111) and the diffusion cavity (2113) is provided on the first surface; the first sealing ring (213) is installed on the first surface, and the second sealing ring (214) is installed on the second surface.
2. The electrolytic cell according to claim 1, characterized in that The first through hole (2111) and the second through hole (2112) are both waist-shaped long holes.
3. The electrolytic cell according to claim 2, characterized in that Support ribs (2115) contacting the electrode plate (1) are arranged in the communicating groove.
4. The electrolytic cell according to claim 1, characterized in that The first sealing ring (213) comprises a first ring body (2131) and two second ring bodies (2132) connected to the first ring body (2131); the first ring body (2131) is arranged around the diffusion cavity (2113) and the first through hole (2111); and the two second ring bodies (2132) are respectively arranged around the two second through holes (2112).
5. The electrolytic cell according to claim 3, characterized in that The guide plate (211) is provided with a first installation groove (2116) located on the first surface and adapted to the first sealing ring (213); the first sealing ring (213) is embedded in the first installation groove (2116).
6. The electrolytic cell according to claim 1, characterized in that The second sealing ring (214) comprises a connected third ring body (2141) and two fourth ring bodies (2142) and two fifth ring bodies (2143) connected to the third ring body (2141); the third ring body (2141) is arranged around the diffusion cavity (2113); the two fourth ring bodies (2142) are respectively arranged around the two first through holes (2111); and the two fifth ring bodies (2143) are respectively arranged around the two second through holes (2112).
7. The electrolytic cell according to claim 6, characterized in that The guide plate (211) is provided with a second installation groove (2117) located on the second surface and adapted to the second sealing ring (214), and the second sealing ring (214) is embedded in the second installation groove (2117).
8. The electrolytic cell according to claim 1, characterized in that The first sealing ring (213) and the second sealing ring (214) are both made of food-grade fluororubber.
9. The electrolytic cell according to claim 1, characterized in that The electrode plate (1) further comprises an intermediate electrode plate (13); there are at least two single slots (2) which are stacked; the intermediate electrode plate (13) is arranged between two adjacent single slots (2); the anode plate (11) and the cathode plate (12) are respectively located at the two outermost sides of all the single slots (2); and the intermediate electrode plate (13) is provided with a connecting hole (131) for conducting the water paths of the two connected single slots (2).
10. The electrolytic cell according to claim 1, characterized in that The diffusion layer (212) comprises a titanium mesh (2121) and a titanium felt (2122), and the titanium felt (2122) is arranged close to the membrane electrode (22).