Cathode structure of ionic membrane electrolytic cell

Abstract

The utility model relates to a cathode structure of an ionic membrane electrolytic bath, which belongs to the technical field of electrolysis and comprises a cathode electrode net and a bottom net, a rib plate is arranged on one side of the bottom net, the other side of the bottom net is connected with the cathode electrode net through an elastic body, the elastic body is a crossed claw-shaped sheet and is provided with two pressure-bearing ends, and the two pressure-bearing ends are connected with the bottom net through a connecting rod. Protrusions are arranged on the two pressure bearing ends, and the protrusions are in an arc shape. According to the utility model, the conductive effect of the cathode elastic layer is ensured, meanwhile, the cathode elastic layer does not cause larger pressure on the ionic membrane during operation, and the harm of poor reaction in the operation process is prevented.

Description

Technical Field

[0001] The utility model relates to a cathode structure of an ion membrane electrolytic cell, belonging to the technical field of electrolysis. Background Art

[0002] With the development of caustic soda technology, safe operation and energy saving and consumption reduction are the goals pursued by caustic soda enterprises, and membrane electrode distance technology has been fully adopted.

[0003] To reduce energy consumption, ion membrane manufacturers have been releasing products with lower resistance and improved performance. As ion membranes become thinner, their durability decreases. Membrane spacing technology is designed to reduce the voltage drop between the cathode and anode electrodes. However, existing membrane spacing technology, due to issues such as elastomer pressure, cathode medium flow resistance, and elevated membrane temperature, shortens the lifespan of ion membranes.

[0004] Therefore, a cathode structure of an ion membrane electrolyzer is needed to ensure the conductive effect of the cathode elastic layer. At the same time, during operation, the cathode elastic layer will not cause a large pressure on the ion membrane, thereby preventing the hazard of reverse pressure difference during operation. Summary of the Invention

[0005] The technical problem to be solved by the utility model is: in order to overcome the shortcomings of the existing technology, a cathode structure of an ion membrane electrolyzer is provided to ensure the conductive effect of the cathode elastic layer. At the same time, during operation, the cathode elastic layer will not cause a large pressure on the ion membrane, thereby preventing the harm of reaction difference during operation.

[0006] The technical solution adopted by the present invention to solve the above problems is: a cathode structure of an ion membrane electrolyzer, including a cathode electrode mesh and a bottom mesh, one side of the bottom mesh is provided with a rib plate, and the other side of the bottom mesh is connected to the cathode electrode mesh through an elastic body, the elastic body is a cross-claw-shaped sheet, and the elastic body is provided with two pressure-bearing ends, both of which are provided with protrusions, and the protrusions are arc-shaped.

[0007] Preferably, a plurality of the elastic bodies are provided, and the plurality of elastic bodies are distributed in a matrix.

[0008] Preferably, the cathode electrode mesh is a nickel wire woven mesh with a diameter of φ0.15~φ0.18.

[0009] Preferably, the surface of the cathode electrode mesh is coated with a noble metal oxide active catalyst.

[0010] Preferably, the bottom mesh is a nickel plate expanded mesh.

[0011] Preferably, the elastomer is made of nickel sheet.

[0012] Preferably, the elastic body is fixed to the bottom mesh by welding.

[0013] Preferably, the protrusion and the elastic body are an integrally formed structure.

[0014] Preferably, the side of the pressure-bearing end away from the protrusion is concave.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The utility model provides an ion membrane electrolyzer cathode structure, which ensures the conductive effect of the cathode elastic layer. Simultaneously, during operation, the cathode elastic layer will not cause a large pressure on the ion membrane, thereby preventing the harm of poor reaction during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a cathode structure of an ion membrane electrolyzer according to the present invention;

[0018] Figure 2 Schematic diagram of the connection structure between the bottom net and the elastic body;

[0019] Figure 3 Schematic diagram of the structure of the bottom net;

[0020] Figure 4 Schematic diagram of the structure of the elastomer;

[0021] Figure 5 for Figure 4 AA direction cross-sectional view;

[0022] Figure 6 The utility model is a schematic structural diagram of the working state of the cathode structure of an ion membrane electrolyzer.

[0023] in:

[0024] Cathode electrode mesh 1, bottom mesh 2, rib plate 3, elastic body 4, anode structure 5, gasket 6, ion membrane 7;

[0025] The pressure-bearing end 41 has a protrusion 42 and a recess 43 . DETAILED DESCRIPTION

[0026] like Figure 1-6 As shown, a cathode structure of an ion membrane electrolyzer in this embodiment includes a cathode electrode mesh 1 and a bottom mesh 2. A rib plate 3 is provided on one side of the bottom mesh 2. The other side of the bottom mesh 2 is connected to the cathode electrode mesh 1 through multiple elastomers 4. The multiple elastomers 4 are distributed in a matrix. The cathode electrode mesh 1 is a nickel wire woven mesh with a diameter of φ0.15 to φ0.18. The surface of the cathode electrode mesh 1 is coated with a precious metal oxide active catalyst. The bottom mesh 2 is an expanded nickel plate mesh.

[0027] The elastic body 4 is a cross-claw shaped sheet, the material of the elastic body 4 is a nickel sheet, and the elastic body 4 is welded and fixed to the bottom mesh 2;

[0028] The elastic body 4 is provided with two pressure-bearing ends 41, and each of the two pressure-bearing ends 41 is provided with a protrusion 42. The protrusion 42 is arc-shaped and is integrally formed with the elastic body 4. The side of the pressure-bearing end 41 away from the protrusion 42 is concave 43.

[0029] During operation, the cathode structure and the anode structure 5 are arranged opposite each other, and the ion membrane 7 is located between the cathode structure and the anode structure 5. When the electrolytic cell is installed and used, under the action of the electrolytic cell extruder and the pressure of the oil cylinder, the gasket 6 between the electrolytic cell units is compressed and sealed. At the same time, the elastomer 4 of the cathode structure is compressed, so that the anode electrode, the ion membrane 7, and the cathode electrode are fitted together. Among them, the cathode electrode mesh 1 is the cathode electrode, achieving the membrane electrode distance effect. When the elastomer 4 is compressed, it moves relative to the cathode electrode mesh 1. The elastomer 4 is provided with an arc-shaped protrusion 42 on the pressure-bearing end 41 to ensure that the elastomer 4 can move smoothly while maintaining contact and conductivity.

[0030] In addition, during normal operation, under the premise of ensuring conductivity, the pressure of the elastomer 4 on the ion membrane 7 is relatively small, showing a soft and elastic effect. However, when subjected to an unexpected reaction, the elastomer 4 can still restore its support for the cathode electrode network 1 through the support of the rib plate 3 and the bottom mesh due to its resilience, thereby maintaining voltage stability. Moreover, due to the cross-claw-shaped pieces processed by the nickel sheet of the elastomer 4, the medium flows smoothly, effectively improving the uniformity of the temperature and concentration of the cathode system and reducing the temperature of the mold area. Moreover, when the cathode electrode is replaced at the end of its service life, only the cathode electrode network 1 needs to be replaced, thereby reducing replacement costs.

[0031] In summary, the cathode structure of the ion membrane electrolyzer ensures the conductive effect of the cathode elastic layer. At the same time, during operation, the cathode elastic layer will not cause a large pressure on the ion membrane 7, thereby preventing the harm of reaction difference during operation.

[0032] In addition to the above embodiments, the present invention also includes other implementation methods. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of protection of the claims of the present invention.

Claims

1. A cathode structure of an ion membrane electrolyzer, comprising a cathode electrode mesh (1) and a bottom mesh (2), wherein a rib plate (3) is provided on one side of the bottom mesh (2), and the other side of the bottom mesh (2) is connected to the cathode electrode mesh (1) via an elastic body (4), characterized in that: The elastic body (4) is a cross-claw-shaped piece. The elastic body (4) is provided with two pressure-bearing ends (41). Both pressure-bearing ends (41) are provided with a protrusion (42), and the protrusion (42) is arc-shaped.

2. The cathode structure of an ion-exchange membrane electrolyzer according to claim 1, characterized in that: A plurality of the elastic bodies (4) are provided, and the plurality of elastic bodies (4) are distributed in a matrix.

3. The cathode structure of an ion-exchange membrane electrolyzer according to claim 1, characterized in that: The cathode electrode mesh (1) is a nickel wire braided mesh with a diameter of φ0.15-φ0.

18.

4. The cathode structure of an ion-exchange membrane electrolyzer according to claim 1, characterized in that: The surface of the cathode electrode mesh (1) is coated with a noble metal oxide active catalyst.

5. The cathode structure of an ion-exchange membrane electrolyzer according to claim 1, characterized in that: The bottom mesh (2) is a nickel plate expanded mesh.

6. The cathode structure of an ion-exchange membrane electrolyzer according to claim 1, characterized in that: The elastic body (4) is made of nickel sheet.

7. The cathode structure of an ion-exchange membrane electrolyzer according to claim 1, characterized in that: The elastic body (4) is fixed to the bottom net (2) by welding.

8. The cathode structure of an ion-exchange membrane electrolyzer according to claim 1, characterized in that: The protrusion (42) and the elastic body (4) are an integrally formed structure.

9. The cathode structure of an ion-exchange membrane electrolyzer according to claim 1, characterized in that: The side of the pressure-bearing end (41) away from the protrusion (42) is concave (43).

Images