Electrolytic cell and production line body

Abstract

The application relates to the technical field of electrolytic equipment for chemical materials, and discloses an electrolytic tank and a production line body, which have a first direction, a second direction and a third direction perpendicular to each other, and comprise an outer shell, an insulating component and an electrode stack. The outer shell is provided with a containing cavity, a liquid inlet and a liquid outlet. The insulating component is arranged in the containing cavity and is provided with a containing channel extending along the first direction. The electrode stack is arranged in the containing channel and comprises an anode plate, a plurality of electrode plates and a cathode plate. The anode plate, the plurality of electrode plates and the cathode plate are sequentially and spacedly arranged along the second direction to form a plurality of electrolytic channels, and the two ends of the plurality of electrolytic channels are respectively communicated with the liquid inlet and the liquid outlet. The side surface of the anode plate along the third direction, the side surface of the cathode plate along the third direction and the side surfaces of the plurality of electrode plates along the third direction are all arranged to be isolated from the plurality of electrolytic channels, so that the service life of the electrolytic tank is prolonged, and the explosion risk is reduced.

Description

Technical Field

[0001] This application relates to the field of chemical material electrolysis equipment technology, specifically to electrolytic cells and production lines. Background Technology

[0002] Among related technologies, electrolysis uses electrical energy to drive the reaction, which is highly efficient and controllable, and can easily achieve continuous production; moreover, the product has high purity and fewer side reactions due to the directional migration of ions.

[0003] However, the anode of the electrolytic cell is made of carbon steel. During the electrolysis reaction, the iron ions generated by the corrosion of the carbon steel anode will enter the electrolyte. During the recycling of the electrolyte, iron ions are easy to deposit on the cathode to form an iron coating, which in turn causes hydrogen evolution reaction. The exhaust gas produced by the anode is mainly composed of oxygen, resulting in a short electrode life and a high risk of explosion. Summary of the Invention

[0004] This application provides an electrolytic cell and production line body to solve or improve the problems of short service life and high explosion risk of electrolytic cells.

[0005] On one hand, this application provides an electrolytic cell having two perpendicular directions: a first direction, a second direction, and a third direction. It includes a shell, an insulating component, and an electrode stack. The shell has a receiving cavity, an inlet, and an outlet. The insulating component is disposed within the receiving cavity and has a receiving channel extending along the first direction. The electrode stack is disposed within the receiving channel and includes an anode plate, multiple electrode plates, and a cathode plate. The anode plate, multiple electrode plates, and the cathode plate are sequentially spaced along the second direction to form multiple electrolytic channels. Both ends of the multiple electrolytic channels are respectively connected to the inlet and the outlet. The sides of the anode plate along the third direction, the sides of the cathode plate along the third direction, and the sides of the multiple electrode plates along the third direction are all isolated from the multiple electrolytic channels.

[0006] In one optional embodiment, insulating sealing gaskets are provided on both sides of the electrolysis channel along the third direction, and the insulating sealing gaskets extend along the first direction.

[0007] In one optional embodiment, the anode plate includes a first insulating portion, an anode portion, and a second insulating portion arranged sequentially along the first direction; the electrode plate includes a third insulating portion, an electrode portion, and a fourth insulating portion arranged sequentially along the first direction; and the cathode plate includes a fifth insulating portion, a cathode portion, and a sixth insulating portion arranged sequentially along the first direction.

[0008] In an optional embodiment, the device further includes a liquid inlet guide, which is located between the electrode stack and the liquid inlet within the accommodating cavity. The liquid inlet guide has a liquid inlet guide hole, one end of which communicates with the liquid inlet, and the other end edge of which is sealed and connected to the end of the electrode stack along the first direction. A first annular sealing assembly is embedded on the outer peripheral surface of the liquid inlet guide, and the first annular sealing assembly is in sealing contact with the side wall of the accommodating cavity.

[0009] And / or, it further includes a liquid outlet guide, the liquid outlet guide being located between the electrode stack and the liquid outlet within the accommodating cavity, the liquid outlet guide having a liquid outlet guide hole, one end of the liquid outlet guide hole communicating with the liquid outlet, and the other end edge of the liquid outlet guide hole sealingly engaging with the end of the electrode stack along the first direction; a second annular sealing assembly is embedded on the outer peripheral surface of the liquid outlet guide, the second annular sealing assembly being in sealing contact with the side wall of the accommodating cavity.

[0010] In one optional embodiment, a first sealing ring is provided between the surface edge of the anode plate away from the electrode plate and the inner wall of the receiving channel; a second sealing ring is provided between the surface edge of the cathode plate away from the electrode plate and the inner wall of the receiving channel.

[0011] In one optional embodiment, the insulating component includes a first insulating plate, a second insulating plate, a third insulating plate, and a fourth insulating plate. The first insulating plate and the third insulating plate are spaced apart along the third direction, and the second insulating plate and the fourth insulating plate are spaced apart along the second direction. The second insulating plate and the fourth insulating plate are located between the first insulating plate and the third insulating plate. The first insulating plate, the second insulating plate, the third insulating plate, and the fourth insulating plate are sealed together to form the receiving channel.

[0012] In one optional embodiment, the outer casing includes an inlet cap, a cylindrical body, and an outlet cap. The cylindrical body has openings at both ends along the first direction, and the inlet cap and the outlet cap respectively cover the two openings of the cylindrical body along the first direction.

[0013] In one optional embodiment, the cylinder includes a cylinder body and two cover plates. The cylinder body has mounting holes on both end faces along the third direction, and the two cover plates respectively cover the two mounting holes.

[0014] In an optional embodiment, the system further includes an anode terminal and a cathode terminal, wherein the anode terminal passes through the housing and the insulating component and is connected to the anode plate, and the cathode terminal passes through the housing and the insulating component and is connected to the cathode plate.

[0015] On the other hand, this application also provides a production line body, including: the electrolytic cell in any of the above embodiments.

[0016] Beneficial Effects: This application provides an electrolytic cell and production line body, which uses insulating components housed within the housing cavity of the outer shell, and electrode stacks housed within the housing channels of the insulating components, thus preventing short circuits between the electrode stacks and the outer shell. The anode plate, multiple electrode plates, and cathode plates of the electrode stack are sequentially and spaced apart along a second direction to form multiple electrolytic channels. The sides of the anode plate, cathode plate, and multiple electrode plates along a third direction are isolated from the multiple electrolytic channels. This allows the electrolyte to contact only the sides of the electrode plates along the second direction, the sides of the anode plate near the electrode plates along the second direction, and the sides of the cathode plate near the electrode plates along the second direction for electrolysis. This reduces the contact area between the electrolyte and the anode plate, thereby reducing the corrosion rate of the anode plate. This reduces the amount of iron ions entering the electrolyte, thus slowing down the deposition of iron ions on the cathode side to form an iron plating layer, increasing the electrode lifespan, and reducing hydrogen production to lower the risk of explosion. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is an isometric view of an electrolytic cell according to an embodiment of this application;

[0019] Figure 2 This is a left view of an electrolytic cell according to an embodiment of this application;

[0020] Figure 3 for Figure 2 Sectional view at point AA;

[0021] Figure 4 for Figure 2 Sectional view at point BB;

[0022] Figure 5 This is an axial view of an electrode stack in an electrolytic cell according to an embodiment of this application;

[0023] Figure 6 This is an axial view of an anode plate in an electrolytic cell according to an embodiment of this application;

[0024] Figure 7This is an axial view of an electrode plate in an electrolytic cell according to an embodiment of this application;

[0025] Figure 8 This is an axial view of a cathode plate in an electrolytic cell according to an embodiment of this application;

[0026] Figure 9 This is an axial view of the inner cylinder body of an electrolytic cell according to an embodiment of this application;

[0027] Figure 10 This is an axial view of an insulating component in an electrolytic cell according to an embodiment of this application;

[0028] Figure 11 This is an isometric view of an inlet guide in an electrolytic cell according to an embodiment of this application;

[0029] Figure 12 This is an isometric view of an electrolytic cell outlet guide component according to an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] X, first direction; Y, second direction; Z, third direction;

[0032] 1. Outer shell; 2. Insulating components; 3. Electrode stack; 4. Liquid inlet guide; 5. Liquid outlet guide; 6. Anode terminal; 7. Cathode terminal; 8. Sealing insulating sleeve;

[0033] 11. Receptacle; 12. Liquid inlet; 13. Liquid outlet; 14. Cylinder; 15. Liquid inlet cap; 16. Liquid outlet cap;

[0034] 141. Cylinder body; 1411. Mounting hole; 142. Cover plate;

[0035] 21. Receiving channel; 22. First insulating plate; 23. Second insulating plate; 24. Third insulating plate; 25. Fourth insulating plate;

[0036] 31. Anode plate; 32. Electrode plate; 33. Cathode plate; 34. Electrolysis channel; 35. Insulating sealing gasket;

[0037] 311. First insulating part; 312. Anode part; 313. Second insulating part; 314. First sealing ring;

[0038] 321. Third insulating part; 322. Electrode part; 323. Fourth insulating part;

[0039] 331. Fifth insulating part; 332. Cathode part; 333. Sixth insulating part; 334. Second sealing ring;

[0040] 41. Liquid inlet guide hole; 42. First annular sealing assembly;

[0041] 51. Liquid outlet guide hole; 52. Second annular sealing assembly. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two elements. The terms "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism can be, for example, within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality can be, for example, a difference between the two equal items being less than or equal to 5% of either one. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] Among related technologies, electrolysis uses electrical energy to drive the reaction, which is highly efficient and controllable, and can easily achieve continuous production; moreover, the product has high purity and fewer side reactions due to the directional migration of ions.

[0045] However, the anode of the electrolytic cell is made of carbon steel. During the electrolysis reaction, the iron ions generated by the corrosion of the carbon steel anode will enter the electrolyte. During the recycling of the electrolyte, iron ions are easy to deposit on the cathode to form an iron coating, which in turn causes hydrogen evolution reaction. The exhaust gas produced by the anode is mainly composed of oxygen, resulting in a short electrode life and a high risk of explosion.

[0046] Therefore, this application provides an electrolytic cell and production line body to solve or improve the problems of short service life and high explosion risk of electrolytic cells.

[0047] The following is combined Figures 1 to 12 This describes an embodiment of the present application.

[0048] According to embodiments of this application, in one aspect, an electrolytic cell is provided, such as... Figures 1 to 5 As shown, it has a first direction X, a second direction Y and a third direction Z that are perpendicular to each other, and includes a shell 1, an insulating component 2 and an electrode stack 3. The specific scheme is as follows.

[0049] like Figure 1 As shown, the outer shell 1 can be a metal shell, such as a corrosion-resistant aluminum alloy shell; the outer shell 1 can be in the shape of a cuboid or a cylinder; the shell has a receiving cavity 11, a liquid inlet 12 and a liquid outlet 13. The liquid inlet 12 is used to connect with the electrolyte supply pipeline to introduce electrolyte, and the liquid outlet 13 is used to connect with the electrolyte collection and treatment pipeline to output the electrolyte after electrolysis.

[0050] like Figure 3 As shown, the insulating component 2 can be any one of alumina ceramic block, silicon nitride ceramic block, polytetrafluoroethylene block, and epoxy resin block; the insulating component 2 is disposed in the accommodating cavity 11, and the insulating component 2 has an accommodating channel 21 extending along the first direction X. Specifically, the cross-section of the accommodating channel 21 is preferably rectangular or the like. Of course, the insulating component 2 can be an integral composite structure with the outer shell 1, that is, the insulating component 2 can be an insulating layer covering the wall of the accommodating cavity 11.

[0051] The electrode stack 3 is disposed in the accommodating channel 21. The electrode stack 3 includes an anode plate 31, multiple electrode plates 32 and a cathode plate 33. The anode plate 31 is made of carbon steel, and the cathode plate 33 and electrode plates 32 are made of lead plates or partitions, etc.

[0052] like Figures 3 to 5 As shown, the anode plate 31, multiple electrode plates 32 and cathode plate 33 are arranged sequentially and spaced apart along the second direction Y to form multiple electrolysis channels 34, and both ends of the multiple electrolysis channels 34 are connected to the liquid inlet 12 and the liquid outlet 13, respectively.

[0053] Specifically, the number of electrode plates 32 ranges from 5 to 200, and can be any one or any two values ​​from 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, and 200.

[0054] It is understood that the anode plate 31, multiple electrode plates 32 and cathode plate 33 are arranged sequentially and spaced apart along the second direction Y to form multiple electrolysis channels 34. Specifically, the space between the anode plate 31 and the electrode plate 32 close to the anode plate 31 is an electrolysis channel 34, the space between any two adjacent electrode plates 32 is an electrolysis channel 34, and the space between the cathode plate 33 and the electrode plate 32 close to the cathode plate 33 is an electrolysis channel 34.

[0055] Among them, such as Figure 3 As shown, the sides of the anode plate 31 along the third direction Z, the sides of the cathode plate 33 along the third direction Z, and the sides of the multiple electrode plates 32 along the third direction Z are all isolated from the multiple electrolysis channels 34.

[0056] Specifically, the anode plate 31 is isolated from the electrolysis channel 34 on the side along the third direction Z. This can be understood as the electrolyte in the electrolysis channel 34 being unable to contact the two sides of the anode plate 31 along the third direction Z.

[0057] The electrode plate 32 is isolated from the electrolysis channel 34 on the side along the third direction Z. This means that the electrolyte in the electrolysis channel 34 cannot come into contact with the two sides of the electrode plate 32 along the third direction Z.

[0058] The cathode plate 33 is isolated from the electrolysis channel 34 on the side along the third direction Z. This means that the electrolyte in the electrolysis channel 34 cannot come into contact with the two sides of the cathode plate 33 along the third direction Z.

[0059] In specific usage, such as Figures 1 to 5 As shown, taking the production of adiponitrile from acrylonitrile by electrolytic dimerization as an example, oxygen is generated at the anode plate 31, and adiponitrile is generated on the cathode side.

[0060] Acrylonitrile electrolyte is introduced into the electrolysis channel 34 through the inlet 12. The acrylonitrile electrolyte only comes into contact with the side of the electrode plate 32 along the second direction Y, the side of the anode plate 31 along the second direction Y near the electrode plate 32, and the side of the cathode plate 33 along the second direction Y near the electrode plate 32 for electrolysis. After electrolysis, it is discharged from the outlet 13 for subsequent separation.

[0061] In this embodiment, such as Figures 1 to 5 As shown, an insulating component 2 is installed inside the receiving cavity 11 of the outer shell 1, and the electrode stack 3 is installed inside the receiving channel 21 of the insulating component 2, which can prevent the electrode stack 3 from short-circuiting with the outer shell 1; the anode plate 31, multiple electrode plates 32 and cathode plate 33 of the electrode stack 3 are arranged sequentially and spaced apart along the second direction Y to form multiple electrolytic channels 34, and the sides of the anode plate 31 along the third direction Z, the sides of the cathode plate 33 along the third direction Z and the sides of the multiple electrode plates 32 along the third direction Z are all isolated from the multiple electrolytic channels 34, which can make Electrolyte only contacts the side of electrode plate 32 along the second direction Y, the side of anode plate 31 along the second direction Y near electrode plate 32, and the side of cathode plate 33 along the second direction Y near electrode plate 32 for electrolysis. This reduces the contact area between the electrolyte and anode plate 31, thereby reducing the corrosion rate of anode plate 31. This reduces the amount of iron ions entering the electrolyte, thus slowing down the deposition of iron ions on the cathode side to form an iron plating layer, improving the service life of the electrode, and reducing the amount of hydrogen produced to reduce the risk of explosion.

[0062] In some embodiments not shown, the anode plate 31 abuts against the inner wall of the accommodating channel 21 at its two end faces along the third direction Z, and the electrode plate 32 abuts against the inner wall of the accommodating channel 21 at its two end faces along the third direction Z; the cathode plate 33 abuts against the inner wall of the accommodating channel 21 at its two end faces along the third direction Z; alternatively, the sides of the anode plate 31 along the third direction Z, the sides of the cathode plate 33 along the third direction Z, and the sides of the multiple electrode plates 32 along the third direction Z can all be isolated from the multiple electrolysis channels 34.

[0063] In one embodiment, such as Figures 3 to 5 As shown, insulating sealing gaskets 35 are provided on both sides of the electrolysis channel 34 along the third direction Z, and the insulating sealing gaskets 35 extend along the first direction X; specifically, the insulating sealing gaskets 35 can be any one of polytetrafluoroethylene blocks and epoxy resin blocks.

[0064] It is understood that the electrolytic channel 34 between the anode plate 31 and the electrode plate 32 is formed by the anode plate 31, the electrode plate 32 near the anode plate 31, and two sealing insulating gaskets located between the anode plate 31 and the electrode plate 32 near the anode plate 31.

[0065] The electrolytic channel 34 between the cathode plate 33 and the electrode plate 32 is formed by the cathode plate 33, the electrode plate 32 near the cathode plate 33, and two sealing insulating gaskets located between the cathode plate 33 and the electrode plate 32 near the cathode plate 33.

[0066] The electrolytic channel 34 between any two adjacent electrode plates 32 is formed by the two adjacent electrode plates 32 and two sealing insulating gaskets located between the two adjacent electrode plates 32.

[0067] Specifically, the insulating sealing gasket 35 can be in contact with the insulating component 2 or can be spaced apart from the insulating component 2. Preferably, the insulating sealing gasket 35 is in contact with the insulating component 2.

[0068] In this embodiment, such as Figures 3 to 5 As shown, insulating sealing gaskets 35 are provided on both sides of the electrolysis channel 34 along the third direction Z. This can control the spacing between adjacent electrode plates 32, the spacing between the anode plate 31 and the electrode plate 32 near the anode plate 31, and the spacing between the cathode plate 33 and the electrode plate near the cathode plate 33. It can also isolate the electrolysis channel 34 and the sides of the anode plate 31, the cathode plate 33, and multiple electrode plates 32 along the third direction Z. The solution is simple and low in cost.

[0069] In one embodiment, such as Figure 6 As shown, the anode plate 31 includes a first insulating portion 311, an anode portion 312, and a second insulating portion 313 arranged sequentially along the first direction X; as Figure 7 As shown, the electrode plate 32 includes a third insulating portion 321, an electrode portion 322, and a fourth insulating portion 323 arranged sequentially along the first direction X; as Figure 8 As shown, the cathode plate 33 includes a fifth insulating portion 331, a cathode portion 332 and a sixth insulating portion 333 arranged sequentially along the first direction X.

[0070] In a specific structure, the first insulating part 311 and the second insulating part 313 are insulating layers. They are sprayed onto the two ends of the anode plate 31 along the first direction X to form the first insulating part 311 and the second insulating part 313 respectively. The anode part 312 is formed between the first insulating part 311 and the second insulating part 313.

[0071] The third insulating part 321 and the fourth insulating part 323 are insulating layers. They are sprayed onto the two ends of the electrode plate 32 along the first direction X to form the third insulating part 321 and the fourth insulating part 323 respectively. The electrode part 322 is formed between the third insulating part 321 and the fourth insulating part 323.

[0072] The fifth insulating part 331 and the sixth insulating part 333 are insulating layers. They are sprayed onto the two ends of the cathode plate 33 along the first direction X to form the fifth insulating part 331 and the sixth insulating part 333 respectively. The cathode part 332 is formed between the fifth insulating part 331 and the sixth insulating part 333.

[0073] In another specific structure, the first insulating part 311 and the second insulating part 313 are insulating blocks, and the anode part 312 is an anode block. The first insulating part 311 and the second insulating part 313 are respectively connected to the two ends of the anode block along the first direction X by adhesive bonding or other connection methods (such as snap-fit).

[0074] The third insulating part 321 and the fourth insulating part 323 are insulating blocks, and the electrode part 322 is an electrode block. The third insulating part 321 and the fourth insulating part 323 are connected to the two ends of the electrode block along the first direction X by means of bonding or other connection methods (such as snap-fit).

[0075] The fifth insulating part 331 and the sixth insulating part 333 are insulating blocks, and the cathode part 332 is a cathode block. The fifth insulating part 331 and the sixth insulating part 333 are connected to the cathode block at both ends along the first direction X by means of bonding or other connection methods (such as snap-fit).

[0076] Specifically, the materials of the first insulating part 311, the second insulating part 313, the third insulating part 321, the fourth insulating part 323, the fifth insulating part 331, and the sixth insulating part 333 can be the same or different, specifically any one of alumina ceramic, silicon nitride ceramic, polytetrafluoroethylene, soluble polytetrafluoroethylene, ethylene propylene diene monomer (EPDM) rubber, chloroprene rubber, epoxy resin, etc.

[0077] It is understandable that the first insulating part 311 and the second insulating part 313 can shield the two ends of the anode part 312 along the first direction X, thereby reducing the contact between the two end faces of the anode part 312 along the first direction X and the electrolyte, reducing the anode corrosion rate, and reducing the generation of iron ions.

[0078] The third insulating part 321 and the fourth insulating part 323 can shield the two ends of the electrode part 322 along the first direction X, thereby reducing the contact between the two end faces of the electrode part 322 along the first direction X and the electrolyte, and reducing the corrosion rate.

[0079] The fifth insulating part 331 and the sixth insulating part 333 can shield the two ends of the cathode part 332 along the first direction X, thereby reducing the contact between the two end faces of the cathode part 332 along the first direction X and the electrolyte, and reducing the corrosion rate.

[0080] Meanwhile, the first insulating part 311, the third insulating part 321, and the fifth insulating part 331, which are spaced apart along the second direction Y, can increase the resistance value of the electrode stack 3 at one end along the first direction X and increase the electrolysis efficiency of the current.

[0081] The second insulating part 313, the fourth insulating part 323, and the fifth insulating part 331, which are spaced apart along the second direction Y, can increase the resistance value of the electrode stack 3 at the other end along the first direction X and increase the electrolysis efficiency of the current.

[0082] In this embodiment, such as Figures 6 to 8 As shown, the anode plate 31 includes a first insulating portion 311, an anode portion 312, and a second insulating portion 313 arranged sequentially along the first direction X; the electrode plate 32 includes a third insulating portion 321, an electrode portion 322, and a fourth insulating portion 323 arranged sequentially along the first direction X; the cathode plate 33 includes a fifth insulating portion 331, a cathode portion 332, and a sixth insulating portion 333 arranged sequentially along the first direction X. The first insulating portion 311, the second insulating portion 313, the third insulating portion 321, the fourth insulating portion 323, the fifth insulating portion 331, and the sixth insulating portion 333 all form an insulating extension region at both ends of the electrode stack 3 along the first direction X, increasing the resistance value of the electrode stack 3 at both ends along the first direction X, thereby reducing the corrosion of the electrolyte with the non-reactive regions of the anode portion 312, the electrode portion 322, and the cathode portion 332, and increasing the electrolysis efficiency of the current.

[0083] In one embodiment, such as Figure 4 and Figure 11 As shown, the electrolytic cell also includes a liquid inlet guide 4, which is located between the electrode stack 3 and the liquid inlet 12 inside the accommodating cavity 11. The liquid inlet guide 4 is made of non-metallic insulating material. The liquid inlet guide 4 can be fitted to the inner wall of the accommodating cavity 11 or left gapped.

[0084] The liquid inlet guide 4 has a liquid inlet guide hole 41. One end of the liquid inlet guide hole 41 is connected to the liquid inlet 12, and the other end edge of the liquid inlet guide hole 41 is sealed and connected to the end of the electrode stack 3 along the first direction X. Specifically, an annular groove is provided on the end face of the liquid inlet guide groove that is connected to the electrode stack 3. A rubber sealing ring is provided in the annular groove to make sealed contact with the electrode stack 3.

[0085] A first annular sealing assembly 42 is embedded on the outer peripheral surface of the liquid inlet guide 4. The first annular sealing assembly 42 is in sealing contact with the side wall of the accommodating cavity 11. Specifically, the first annular sealing assembly 42 includes a plurality of first sealing rings spaced apart along the first direction X. Preferably, the number of first sealing rings is 2.

[0086] like Figure 4 and Figure 12As shown, the electrolytic cell also includes an outlet guide 5, which is located between the electrode stack 3 and the outlet 13 inside the accommodating cavity 11. The outlet guide 5 is made of non-metallic insulating material. The outlet guide 5 can be fitted to the inner wall of the accommodating cavity 11 or left gapped.

[0087] The liquid outlet guide 5 has a liquid outlet guide hole 51. One end of the liquid outlet guide hole 51 is connected to the liquid outlet 13, and the other end edge of the liquid outlet guide hole 51 is sealed and connected to the end of the electrode stack 3 along the first direction X. Specifically, an annular groove is provided on the end face of the liquid outlet guide groove that is connected to the electrode stack 3. A rubber sealing ring is provided in the annular groove to make sealed contact with the electrode stack 3.

[0088] A second annular sealing assembly 52 is embedded on the outer peripheral surface of the liquid outlet guide 5. The second annular sealing assembly 52 is in sealing contact with the side wall of the accommodating cavity 11. Specifically, the second annular sealing assembly 52 includes a plurality of second sealing rings spaced apart along the first direction X. Preferably, the number of second sealing rings is 2.

[0089] In this embodiment, such as Figure 4 , Figure 11 and Figure 12 As shown, an inlet guide 4 and a storage guide 4 are respectively set at both ends of the electrode stack 3 along the first direction X. The inlet 12 is sealed and connected to multiple electrolysis channels 34 through the inlet guide hole 41, and the outlet 13 is sealed and connected to multiple electrolysis channels 34 through the outlet guide hole 51. This allows the electrolyte to be directly guided into the multiple electrolysis channels 34 and then directly guided out of the electrolytic cell after electrolysis. This avoids the electrolyte remaining in the dead corners where the accommodating cavity 11 connects to the inlet 12 and the outlet 13, which would cause hydrogen gas in the electrolyte to accumulate in the dead corners at the inlet 12 and the outlet 13, increasing the risk of explosion of the electrolytic cell.

[0090] Meanwhile, the inlet guide 4 is in sealed contact with the inner wall of the electrode stack 3 and the accommodating cavity 11, which can prevent the electrolyte from contacting the surface of the anode plate 31 away from the electrode plate 32 through the gap between the inlet guide 4 and the inner wall of the accommodating cavity 11, thereby reducing the corrosion of the anode plate 31 and the risk of explosion of the electrolytic cell; similarly, the outlet guide 5 is in sealed contact with the inner wall of the electrode stack 3 and the accommodating cavity 11, which can prevent the electrolyte from contacting the surface of the anode plate 31 away from the electrode plate 32 through the gap between the outlet guide 5 and the inner wall of the accommodating cavity 11, thereby reducing the corrosion of the anode plate 31 and the risk of explosion of the electrolytic cell.

[0091] In one embodiment, such as Figure 6As shown, a first sealing ring 314 is provided between the edge of the anode plate 31 away from the electrode plate 32 and the inner wall of the accommodating channel 21, which can further prevent the surface of the anode plate 31 away from the electrode plate 32 from contacting the electrolyte; as Figure 8 As shown, a second sealing ring 334 is provided between the edge of the cathode plate 33 away from the electrode plate 32 and the inner wall of the accommodating channel 21, which can further prevent the surface of the cathode plate 33 away from the electrode plate 32 from contacting the electrolyte.

[0092] In one embodiment, such as Figure 10 As shown, the insulating component 2 includes a first insulating plate 22, a second insulating plate 23, a third insulating plate 24, and a fourth insulating plate 25. The first insulating plate 22 and the third insulating plate 24 are spaced apart along the third direction Z, and the second insulating plate 23 and the fourth insulating plate 25 are spaced apart along the second direction Y. The second insulating plate 23 and the fourth insulating plate 25 are located between the first insulating plate 22 and the third insulating plate 24. The first insulating plate 22, the second insulating plate 23, the third insulating plate 24, and the fourth insulating plate 25 are sealed together to form an accommodating channel 21.

[0093] Specifically, the first insulating plate 22, the second insulating plate 23, and the third insulating plate 24 are each provided with multiple sets of corresponding bolt holes, which are spaced apart along the first direction X, and each set of corresponding bolt holes is provided with a bolt, so as to realize the connection and fixation of the first insulating plate 22, the second insulating plate 23, and the third insulating plate 24.

[0094] The first insulating plate 22, the fourth insulating plate 25, and the third insulating plate 24 are each provided with multiple sets of corresponding bolt holes. The multiple sets of corresponding bolt holes are spaced apart along the first direction X, and bolts are provided in the multiple sets of corresponding bolt holes to realize the connection and fixation of the first insulating plate 22, the fourth insulating plate 25, and the third insulating plate 24.

[0095] The end faces of the second insulating plate 23 that meet the first insulating plate 22 and the third insulating plate 24 are all provided with grooves extending along the first direction X. A sealing strip is embedded in the groove to make the second insulating plate 23 and the first insulating plate 22 and the third insulating plate 24 seal together.

[0096] The end face of the fourth insulating plate 25 that is mated with the first insulating plate 22 and the third insulating plate 24 is provided with a groove extending along the first direction X. A sealing strip is embedded in the groove so that the fourth insulating plate 25 is sealed and mated with the first insulating plate 22 and the third insulating plate 24.

[0097] In this embodiment, such as Figure 10As shown, the first insulating plate 22, the second insulating plate 23, the third insulating plate 24 and the fourth insulating plate 25 are sealed and connected to form the accommodating channel 21, which has a simple structure and good sealing and isolation effect.

[0098] In one embodiment, such as Figure 1 As shown, the outer casing 1 includes an inlet cap 15, a cylinder 14, and an outlet cap 16. The cylinder 14 has openings at both ends along the first direction X, and the inlet cap 15 and the outlet cap 16 respectively cover the two openings of the cylinder 14 along the first direction X.

[0099] Specifically, the inlet cap 15 is equipped with a sealing gasket and is connected to the cylinder 14 by bolts; the outlet cap 16 is equipped with a sealing gasket and is connected to the cylinder 14 by bolts.

[0100] In this embodiment, such as Figure 1 As shown, the outer casing 1 includes an inlet cap 15, a cylinder 14, and an outlet cap 16, which facilitates the installation of other components within the accommodating cavity 11.

[0101] In one embodiment, such as Figure 1 and Figure 9 As shown, the cylinder 14 includes a cylinder body 141 and two cover plates 142. The cylinder body 141 has mounting holes 1411 on both end faces along the third direction Z. The two cover plates 142 respectively cover the two mounting holes 1411.

[0102] Specifically, a sealing gasket is provided on the cover plate 142, which is connected to the mounting hole 1411 by bolts.

[0103] In actual use, the insulating component 2 and the electrode stack 3 are assembled into the receiving cavity 11 through the mounting hole 1411.

[0104] In this embodiment, such as Figure 1 and Figure 9 As shown, the cylinder body 141 has mounting holes 1411 on both end faces along the third direction Z, which facilitates the installation of the electrode stack 3 and the insulating components into the accommodating cavity 11.

[0105] In one embodiment, such as Figure 1 As shown, the electrolytic cell also includes an anode terminal 6 and a cathode terminal 7. The anode terminal 6 passes through the outer shell 1 and the insulating component 2 and is connected to the anode plate 31. The cathode terminal 7 passes through the outer shell 1 and the insulating component 2 and is connected to the cathode plate 33.

[0106] Specifically, perforations are provided on both the outer casing 1 and the insulating component 2, that is, perforations are provided on the second insulating plate 23, the fourth insulating plate 25 and the two cover plates 142, and the anode terminal 6 and the cathode terminal 7 are sealed with the perforations; preferably, the anode terminal 6 and the perforation bracket are disposed in the insulating sealing sleeve, and the cathode terminal 7 and the perforation bracket are disposed in the insulating sealing sleeve, which can prevent the current from short-circuiting with the outer casing 1 and the electrolyte from leaking out.

[0107] The anode terminal 6 is connected to the anode plate 31 by threaded connection or welding, and the cathode terminal 7 is connected to the cathode plate 33 by threaded connection or welding, which can increase the contact area.

[0108] In summary, the electrolytic cell provided in this application controls the distance between the electrode plates by using an insulating sealing gasket 35, which isolates the non-reactive area between the anode plate 31 and the cathode plate 33 from the electrolyte. This effectively reduces anode corrosion, lowers the iron ion content in the electrolyte from 1000 ppm to 110 ppm, extends the service life of the electrodes, reduces the frequency of electrode replacement, and effectively reduces production costs.

[0109] By forming insulation extension regions at both ends of the electrode stack 3 along the first direction X through the first insulating part 311, the second insulating part 313, the third insulating part 321, the fourth insulating part 323, the fifth insulating part 331, and the sixth insulating part 333, the influence of the bypass current in the electrolytic cell on electrode corrosion and reaction efficiency is mitigated, increasing the current density to 2000 A / m², and achieving a maximum selectivity of 93% for adiponitrile. While connecting the external current to the electrolytic cell through the conductive structure, the corrosion effect of the electrolyte on the conductive column can be prevented.

[0110] According to an embodiment of this application, in another aspect, a production line body is provided, including the electrolytic cell in any of the above embodiments.

[0111] Specifically, the production line is a line that produces chemical materials through electrolysis, such as an adiponitrile production line.

[0112] In this embodiment, since the production line includes an electrolytic cell and has the same technical effects as the electrolytic cell, it will not be described in detail here.

[0113] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An electrolytic cell having a first direction (X), a second direction (Y), and a third direction (Z) that are perpendicular to each other, characterized in that, include: The outer shell (1) has a receiving cavity (11), a liquid inlet (12) and a liquid outlet (13); An insulating component (2) is disposed within the accommodating cavity (11), the insulating component (2) having an accommodating channel (21) extending along a first direction (X); An electrode stack (3) is disposed within the accommodating channel (21). The electrode stack (3) includes an anode plate (31), a plurality of electrode plates (32), and a cathode plate (33). The anode plate (31), the plurality of electrode plates (32), and the cathode plate (33) are arranged sequentially and spaced apart along the second direction (Y) to form a plurality of electrolysis channels (34). The two ends of the plurality of electrolysis channels (34) are respectively connected to the liquid inlet (12) and the liquid outlet (13). The anode plate (31) along the third direction (Z), the cathode plate (33) along the third direction (Z), and the multiple electrode plates (32) along the third direction (Z) are all isolated from the multiple electrolytic channels (34); each electrolytic channel (34) is provided with an insulating sealing gasket (35) on both sides along the third direction (Z), and the insulating sealing gasket (35) extends along the first direction (X); the anode plate (31) includes a first insulating part (311), an anode part (312), and a second insulating part (313) arranged sequentially along the first direction (X); the electrode plate (32) includes a third insulating part (321), an electrode part (322), and a fourth insulating part (323) arranged sequentially along the first direction (X); the cathode plate (33) includes a fifth insulating part (331), a cathode part (332), and a sixth insulating part (333) arranged sequentially along the first direction (X).

2. The electrolytic cell according to claim 1, characterized in that, It also includes a liquid inlet guide (4), which is located between the electrode stack (3) and the liquid inlet (12) in the accommodating cavity (11). The liquid inlet guide (4) has a liquid inlet guide hole (41), one end of which is connected to the liquid inlet (12), and the other end edge of which is sealed and connected to the end of the electrode stack (3) along the first direction (X). A first annular sealing assembly (42) is embedded on the outer peripheral surface of the liquid inlet guide (4), and the first annular sealing assembly (42) is in sealed contact with the side wall of the accommodating cavity (11). And / or, it also includes a liquid outlet guide (5), which is located between the electrode stack (3) and the liquid outlet (13) in the accommodating cavity (11). The liquid outlet guide (5) has a liquid outlet guide hole (51), one end of which is connected to the liquid outlet (13), and the other end edge of which is sealed and connected to the end of the electrode stack (3) along the first direction (X). A second annular sealing assembly (52) is embedded on the outer peripheral surface of the liquid outlet guide (5), and the second annular sealing assembly (52) is in sealed contact with the side wall of the accommodating cavity (11).

3. The electrolytic cell according to claim 1, characterized in that, A first sealing ring (314) is provided between the surface edge of the anode plate (31) away from the electrode plate (32) and the inner wall of the receiving channel (21); a second sealing ring (334) is provided between the surface edge of the cathode plate (33) away from the electrode plate (32) and the inner wall of the receiving channel (21).

4. The electrolytic cell according to claim 1, characterized in that, The insulating component (2) includes a first insulating plate (22), a second insulating plate (23), a third insulating plate (24), and a fourth insulating plate (25). The first insulating plate (22) and the third insulating plate (24) are spaced apart along the third direction (Z), and the second insulating plate (23) and the fourth insulating plate (25) are spaced apart along the second direction (Y). The second insulating plate (23) and the fourth insulating plate (25) are located between the first insulating plate (22) and the third insulating plate (24). The first insulating plate (22), the second insulating plate (23), the third insulating plate (24), and the fourth insulating plate (25) are sealed together to form the receiving channel (21).

5. The electrolytic cell according to claim 1, characterized in that, The outer casing (1) includes an inlet cap (15), a cylinder (14) and an outlet cap (16). The cylinder (14) has openings at both ends along the first direction (X). The inlet cap (15) and the outlet cap (16) respectively cover the two openings of the cylinder (14) along the first direction (X).

6. The electrolytic cell according to claim 5, characterized in that, The cylinder (14) includes a cylinder body (141) and two cover plates (142). The cylinder body (141) has mounting holes (1411) on both end faces along the third direction (Z). The two cover plates (142) respectively cover the two mounting holes (1411).

7. The electrolytic cell according to claim 1, characterized in that, It also includes an anode terminal (6) and a cathode terminal (7), wherein the anode terminal (6) passes through the housing (1) and the insulating component (2) and is connected to the anode plate (31), and the cathode terminal (7) passes through the housing (1) and the insulating component (2) and is connected to the cathode plate (33).

8. A production line body, characterized in that, include: The electrolytic cell as described in any one of claims 1 to 7.

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