CN216663251U

CN216663251U - Cathode assembly and electrolytic cell having the same

Info

Publication number: CN216663251U
Application number: CN202121858068.5U
Authority: CN
Inventors: 杨国华; 唐宏; 朱立人; 吴彬; 唐建军; 马培岚; 黄建刚
Original assignee: Jiangsu Ancan Technology Co ltd
Current assignee: Jiangsu Ancan Technology Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-06-03
Anticipated expiration: 2031-08-10

Abstract

The utility model provides a cathode assembly and an electrolytic cell with the same. The cathode assembly includes a cathode veil, a cathode bottom veil and a support member. The cathode surface mesh faces the anode assembly in the electrolytic cell; the cathode bottom net is arranged on one side of the cathode surface net, which is far away from the anode assembly, and the cathode bottom net is directly or indirectly fixed on the inner wall of the electrolytic bath body; the support member is a rigid annular structure which is arranged around the edge of the bottom side of the cathode backing net and is fixedly connected to the cathode backing net. According to the utility model, the support component can play a role in reinforcing the cathode assembly, and the deformation resistance of the cathode assembly facing electrolyte fluctuation is improved. Particularly for a zero-polar-distance electrolytic cell, the cathode assembly can prevent the ion membrane from being damaged due to excessive extrusion on the ion membrane, so that the service life of the ion membrane and the electrolytic cell can be prolonged.

Description

Cathode assembly and electrolytic cell having the same

Technical Field

The utility model relates to the field of electrolytic cells, in particular to a cathode assembly for an electrolytic cell and an electrolytic cell with the same.

Background

In the chlor-alkali industry, caustic soda, chlorine and hydrogen are commonly produced by electrolysis of a common salt solution. In the apparatus for electrolyzing salt water, the ion membrane zero-polar distance electrolytic bath is more advanced. The performance and integrity of the ionic membrane plays an absolute role in the performance of the cell. Therefore, how to protect the ionic membrane from being damaged in the electrolytic process of the electrolytic cell is a topic worthy of study.

In the existing electrolytic cell, electrolyte can generate certain fluctuation during working, and the fluctuation of the electrolyte most easily causes the cathode structure to generate fluctuation type displacement at the peripheral edge of the cathode structure, so that the edge part of the cathode structure is in fluctuation type contact with an ion membrane, and certain damage can be caused to the ion membrane. In addition, the cathode structure may generate some burrs around its periphery during fabrication, and these burrs may damage the ion membrane.

There is thus a need to provide a cathode assembly for an electrolytic cell and an electrolytic cell having the same to at least partially address the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cathode assembly for an electrolytic cell and the electrolytic cell with the cathode assembly. In the utility model, a circle of rigid support component is fixedly arranged in the cathode assembly, and the support component can play a role in reinforcing the cathode assembly, thereby improving the deformation resistance of the cathode assembly facing the electrolyte fluctuation. Because the supporting component is arranged, the oscillation or displacement of the cathode component caused by the fluctuation of the electrolyte is reduced or eliminated, and the integral using effect of the electrolytic cell is ensured. Particularly for a zero-polar-distance electrolytic cell, the cathode assembly can prevent the cathode assembly from excessively extruding the ion membrane to damage the ion membrane, so that the service lives of the ion membrane and the electrolytic cell can be prolonged.

According to one aspect of the present invention there is provided a cathode assembly for an electrolytic cell, the cathode assembly comprising:

a cathode mesh facing an anode assembly within the electrolytic cell;

the cathode bottom net is arranged on one side of the cathode surface net, which is far away from the anode assembly, the cathode bottom net is directly or indirectly fixed on the inner wall of the electrolytic bath body,

a support member, which is a rigid ring-shaped structure, disposed around the edge of the bottom side of the cathode bottom mesh and fixedly connected to the cathode bottom mesh.

According to this scheme, the supporting component can play the reinforcing effect to the negative pole subassembly, has promoted the negative pole subassembly and has faced the undulant resistance to deformation of electrolyte, and the negative pole subassembly causes the vibration of self or shift to reduce or eliminate because of the electrolyte is undulant, and the holistic result of use of electrolysis trough is ensured.

In one embodiment, the cathode assembly further comprises an elastic mesh sandwiched between the cathode face mesh and the cathode backing mesh.

In one embodiment, the cathode assembly further comprises a side wall mesh extending from an edge of the cathode veil to the bottom side of the cathode assembly and joined to the cathode bottom mesh, the cathode veil and the side wall together defining a structurally closed receiving space, the elastic mesh and the support member each being located within the receiving space.

According to this scheme, can guarantee the holistic structural stability of negative pole subassembly, avoid elasticity net, supporting part etc. to break away from for the negative pole subassembly main part.

In one embodiment, the side wall mesh comprises a first portion constituting the body of the side wall mesh and a second portion configured from the first portion to pass over the cathode bottom mesh in a direction towards the bottom side of the cathode assembly and to bend towards the bottom side of the cathode bottom mesh to be engageable with the bottom side of the cathode bottom mesh, wherein the bent portion of the second portion forms an annular groove around the cathode bottom mesh, the support member being secured within the annular groove.

According to this scheme, can enough further prevent that the support component from coming off from the major structure of negative pole subassembly, can guarantee again that the support component reinforces the effect to the holistic support of negative pole subassembly.

In one embodiment, the cathode veil, the cathode base screen, and the elastic screen are each formed in a flat plate shape in their respective contours, and the cathode veil, the cathode base screen, and the elastic screen are uniform in shape and size in a direction parallel to the flat plate shape.

According to this scheme, can guarantee that each part of negative pole subassembly has comparatively even elasticity.

In one embodiment, the metal wire is a nickel wire having a diameter of 0.5mm to 10 mm.

According to another aspect of the utility model there is provided an electrolytic cell comprising a cell body and an anode assembly disposed within the cell body and a cathode assembly according to any one of the above aspects.

In one embodiment, rib plates are arranged on the bottom wall of the tank body facing the cathode assembly, and a cathode bottom mesh of the cathode assembly is fixed on the rib plates.

In one embodiment, the cathode assemblies are profiled to form a flat plate shape, and the electrolytic cell comprises at least two of the cathode assemblies arranged in the extension direction of the flat plate shape.

In one embodiment, the electrolytic cell further comprises an ionic membrane.

In one embodiment, the cathode assembly comprises an elastic mesh, and the cathode assembly, the ionic membrane and the anode mesh are sequentially arranged without a space.

According to the scheme, the cathode assembly can avoid collision and damage to the ionic membrane due to the fact that the cathode assembly touches the ionic membrane, and the service lives of the ionic membrane and the electrolytic cell can be prolonged. The cathode assembly provided by the utility model is particularly suitable for such a zero-pole-distance electrolytic cell.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present invention, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals in the drawings refer to like parts. It will be appreciated by persons skilled in the art that the drawings are intended to illustrate preferred embodiments of the utility model without any limiting effect on the scope of the utility model, and that the various components in the drawings are not drawn to scale.

Fig. 1 is a sectional view of a cathode assembly according to a preferred embodiment of the present invention.

Reference numerals are as follows:

100 cathode assembly

110 cathode veil

120 cathode bottom net

130 side wall net

140 elastic net

131 first part of sidewall web

132 second part of sidewall web

132a first portion end

132b annular groove

200 rib plate in groove body

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. What has been described herein is merely a preferred embodiment in accordance with the present invention and other ways of implementing the utility model will be apparent to those skilled in the art from the preferred embodiment and fall within the scope of the utility model.

The utility model provides a cathode assembly for an electrolytic cell and an electrolytic cell having the same. Fig. 1 shows a cathode assembly 100 according to a preferred embodiment of the present invention, the cathode assembly 100 being used in an electrolytic cell having an anode assembly disposed within the cell body facing the cathode assembly 100. The cell may be an ionic membrane cell comprising an ionic membrane between a cathode assembly 100 and an anode assembly. Furthermore, the electrolytic cell can also be an ionic membrane zero-polar-distance electrolytic cell, and in the cell body of the electrolytic cell, the cathode assemblies 100, the ionic membrane and the anode assemblies are sequentially arranged at zero intervals.

The cathode assembly 100 is integrally formed in a plate-like structure, and fig. 1 is a sectional view taken in a plane perpendicular to the plate-like structure and passing through the center of the plate-like structure.

It should be noted that the directions, positions, and the like mentioned in the present invention can be understood by referring to the specific embodiment shown in fig. 1, and each direction, position, and the like should be understood as a relative direction, a relative position, and not an absolute direction, an absolute position, between each component. For example, in the present invention: the direction of the cathode assembly toward the top side, toward the anode assembly, is the direction D1+ shown in fig. 1; the direction of the cathode assembly towards the bottom side, away from the anode assembly, is the direction D1-shown in fig. 1. The D1+ and D1-directions are perpendicular to the overall planar construction of the cathode assembly. The flat plate-like structure is, for example, a rectangular plate, and the direction D2 shown in fig. 1 is, for example, the longitudinal direction or the width direction of the rectangular plate.

With continued reference to fig. 1, the cathode assembly 100 in this embodiment includes a cathode face mesh 110, a cathode base mesh 120, a sidewall mesh 130, and an elastic mesh 140.

Wherein the cathode mesh 110 faces the anode assembly within the cell. The cathode bottom net 120 is arranged on the side of the cathode face net 110 away from the anode assembly, the cathode bottom net 120 is fixedly connected with the rib plates 200 on the inner wall of the electrolytic cell body, and in other embodiments not shown, the cathode bottom net 120 can be fixed on the inner wall of the electrolytic cell body in other manners. The sidewall mesh 130 extends from the edge of the cathode facecloth 110 toward the bottom side of the cathode assembly 100 (i.e., in the D1-direction) and is joined to the cathode bottom mesh 120. The cathode bottom mesh 120, the cathode face mesh 110 and the side walls together define a structurally closed containment space. It will be understood that reference to "structurally closed" in the present invention means that the containment space is only closed in a contoured configuration, not an air-tight, liquid-tight closure, which still allows liquid to pass through.

The elastic net 140 and the support member 150 are located in the receiving space. Wherein the elastic mesh 140 is sandwiched between the cathode veil 110 and the cathode bottom mesh 120, and the support member 150 is a rigid ring-shaped structure which is disposed around the edge of the bottom side of the cathode bottom mesh 120 and is fixedly connected to the cathode bottom mesh 120. Such arrangement ensures structural stability of the cathode assembly 100 as a whole, and prevents the elastic mesh 140, the support member 150, and the like from being detached from the main structure of the cathode assembly 100.

Wherein the support member 150 is, for example, a ring-shaped structure made of a metal wire, preferably a nickel wire, whose diameter is preferably set to 0.5mm to 10 mm. The support member 150 made of a wire can be fixed to the cathode base mesh 120 by welding. It is understood that the support structure mentioned in the present invention has "rigidity" meaning that it has a certain stable shape, and the "rigidity" and the "plasticity", "elasticity" and other concepts are not mutually exclusive, for example, the rigid support structure in the present embodiment has a certain bendable plasticity; in other embodiments, not shown, the rigid support structure may also have some elasticity.

Because the cathode assembly 100 is internally provided with a circle of rigid supporting components 150, the cathode assembly 100 can be prevented from vibrating or shifting due to electrolyte fluctuation, and the overall use effect of the electrolytic cell can be ensured. Especially for a zero-polar distance electrolytic cell, the cathode assembly 100 can avoid the ion membrane from being damaged by collision and touch.

In this embodiment, the cathode assembly 100 has some special structural design suitable for accommodating the support member 150. For example, the side wall mesh 130 comprises a first portion 131 and a second portion 132, the first portion 131 constituting the main body of the side wall mesh 130, the second portion 132 being configured from the first portion 131 to pass over the cathode bottom mesh 120 in a direction towards the bottom side of the cathode assembly 100 (i.e. in the direction D1-and to be bent towards the bottom side of the cathode bottom mesh 120 so that an end 132a of the second portion 132 can engage with the bottom side of the cathode bottom mesh 120. The bent portion of the second portion 132 forms an annular groove 132b surrounding the cathode base mesh 120, and the support member 150 is fixed in the annular groove 132 b. This arrangement can ensure the supporting and reinforcing effect of the support member 150 on the entire cathode module 100 while further preventing the support member 150 from falling off from the main structure of the cathode module 100.

In the present embodiment, the cathode mesh 110 and the side wall mesh 130 are an integral member, and the side wall mesh 130 is formed by bending the cathode mesh 110.

The respective contours of the cathode facer 110, the cathode bed mesh 120, and the elastic mesh 140 are formed in a flat plate shape, and preferably, the cathode facer 110, the cathode bed mesh 120, and the elastic mesh 140 are uniform in shape and size in a direction parallel to the flat plate shape. However, it is understood that although the cathode bottom mesh 120 and the cathode face mesh 110 are uniform in size, the cathode bottom mesh 120, the cathode face mesh 110 and the sidewall mesh 130 are illustrated in fig. 1 as having a substantially trapezoidal cross-sectional shape, rather than a rectangular cross-sectional shape, for illustrative purposes, since the cathode bottom mesh 120 is surrounded by the support member 150 having a certain diameter at the edge thereof.

The detailed arrangement of the cathode assembly 100 provided in this embodiment can be modified or adjusted as needed. For example, in this embodiment, the elastic mesh 140 almost completely fills the receiving space defined by the cathode bottom mesh 120, the cathode face mesh 110 and the sidewall mesh 130, and is provided to ensure uniform elasticity of each part of the cathode assembly 100. In other embodiments, not shown, however, the dimension of the elastic mesh 140 in the direction of the planar extension of the cathode assembly 100 as a whole may be suitably reduced. Also, the cathode assembly 100 with the elastic mesh 140 is particularly suitable for use in a zero-pitch cell, and thus the provision of the elastic mesh 140 can be eliminated as desired in a non-zero-pitch cell.

The utility model also provides an electrolytic cell comprising the cathode assembly 100, rib plates 200 are arranged on the inner wall of the cell body in the electrolytic cell, and the cathode assembly 100 shown in figure 1 can be fixedly connected with the rib plates 200. The cell also includes an anode assembly facing the cathode assembly 100 and optionally also an ionic membrane between the cathode assembly 100 and the anode assembly. The anode assembly may be configured as an anode mesh.

Alternatively, in the electrolytic cell, at least two cathode assemblies 100 shown in fig. 1 may be provided, the at least two cathode assemblies 100 being arranged side by side along the extending direction of the flat plate shape of which they are integrally constituted (for example, along the direction perpendicular to both the D1+ direction and the D2 direction).

Preferably, in the present embodiment, the electrolytic cell may be a zero-pole pitch electrolytic cell, and the cathode assembly 100, the ion membrane and the anode mesh are sequentially attached without a space. Because the cathode assembly 100 is internally and fixedly provided with the rigid supporting component 150, the cathode assembly 100 can be prevented from self oscillation or displacement caused by electrolyte fluctuation, so that the ion membrane can be prevented from being damaged by collision and touch, and the operation effect of the electrolytic cell can be ensured.

According to the utility model, a circle of rigid supporting component is fixedly arranged in the cathode assembly, so that the cathode assembly can be prevented from self oscillation or displacement caused by electrolyte fluctuation, and the using effect of the whole electrolytic cell can be ensured. Especially for a zero-polar distance electrolytic cell, the cathode assembly can prevent the cathode assembly from excessively extruding the ion membrane to damage the ion membrane.

The foregoing description of various embodiments of the utility model is provided for the purpose of description to one of ordinary skill in the relevant art. It is not intended that the utility model be limited to a single disclosed embodiment. As above, many alternatives and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the above teachings. Thus, while some alternative embodiments are specifically described, other embodiments will be apparent to, or relatively easily developed by, those of ordinary skill in the art. The present invention is intended to embrace all such alternatives, modifications and variances of the present invention described herein, as well as other embodiments that fall within the spirit and scope of the present invention as described above.

Claims

1. A cathode assembly for an electrolysis cell, characterized in that the cathode assembly (100) comprises:

a cathode screen (110) facing an anode assembly within the electrolytic cell;

a cathode bottom net (120) arranged on one side of the cathode surface net departing from the anode assembly, the cathode bottom net is directly or indirectly fixed on the inner wall of the electrolytic cell body,

a support member (150) configured as a rigid ring-shaped structure disposed around an edge of a bottom side of the cathode bottom mesh, the support member being fixedly connected with the cathode bottom mesh.

2. The cathode assembly of claim 1, further comprising an elastic mesh (140) sandwiched between the cathode face mesh and the cathode base mesh.

3. The cathode assembly of claim 2, further comprising a side wall mesh (130) extending from an edge of the cathode face mesh to a bottom side of the cathode assembly and joined to the cathode base mesh, the cathode face mesh and the side wall collectively defining a structurally enclosed receiving space, the resilient mesh and the support member each being located within the receiving space.

4. The cathode assembly according to claim 3, wherein the side wall mesh comprises a first portion (131) constituting the body of the side wall mesh and a second portion (132) passing over the cathode bottom mesh from the first portion in a direction towards the bottom side of the cathode assembly and being bent towards the bottom side of the cathode bottom mesh to engage with the bottom side of the cathode bottom mesh, wherein the bent portion of the second portion forms an annular groove (132b) around the cathode bottom mesh, the support member being secured within the annular groove.

5. The cathode assembly according to claim 2, wherein the cathode face mesh, the cathode base mesh and the elastic mesh are each formed in a flat plate shape in their respective contours, and the cathode face mesh, the cathode base mesh and the elastic mesh are uniform in shape and size in a direction parallel to the flat plate shape.

6. The cathode assembly according to any one of claims 1 to 5, wherein the support member is comprised of a wire.

7. The cathode assembly of claim 6, wherein the wire is a nickel wire having a diameter of 0.5mm to 10 mm.

8. An electrolytic cell comprising a cell body and an anode assembly and a cathode assembly according to any one of claims 1 to 7 disposed within the cell body.

9. An electrolysis cell according to claim 8, wherein the bottom wall of the cell body facing the cathode assembly is provided with ribs (200) to which a cathode bottom mesh of the cathode assembly is secured.

10. The cell of claim 8, characterised in that the cathode assemblies are profiled in a plate-like structure, the cell comprising at least two of said cathode assemblies aligned in the extension direction of said plate-like structure.

11. The electrolytic cell of any one of claims 8 to 10 further comprising an ionic membrane.

12. The electrolytic cell of claim 11 wherein the cathode assembly comprises an elastic mesh, and wherein the cathode assembly, the ionic membrane and the anode assembly are arranged in sequence without spacing.