JPS59182981A - Electrode body for electrolysis by ion exchange membrane method - Google Patents

Abstract

PURPOSE:To absorb the deformation of each electrode due to external force and to keep the surface of the electrode in close contact with an ion exchange membrane by elastically adhering the electrode to the membrane with an electrically conductive spring connected to a frame-shaped electrode terminal. CONSTITUTION:Each electrode body is composed of a frame-shaped electrode terminal 1 and a meshy electrode 5 placed in the terminal 1. The inner edges of the terminal 1 are connected to the edges of the electrode 5 with an electrically conductive spring 3 for applying force to the electrode 5 in a direction perpendicular to the surface of the electrode, and the surface of the electrode 5 is adhered to an ion exchange membrane 7. The spring 3 is a partially notched in pipelike shape.

Description

Detailed Description of the Invention The present invention relates to an electrode body for electrolysis of a filter press type ion exchange membrane method electrolyzer, particularly an electrode body for electrolysis used in so-called zero-gap electrolysis, in which one electrode surface is brought into close contact with the ion exchange membrane. Regarding an electrode body.

In alkaline chloride electrolysis of salt, etc., the aim is to reduce power consumption, and a so-called zero-gap method has been developed in which electrolysis is carried out by bringing a flat electrode surface into close contact with an ion exchange membrane. In this zero-gap method, the electrode surface and ion exchange membrane are in close contact with each other, so the resistance caused by the electrolyte is small, which contributes to reducing power consumption. However, since the electrode has no restoring force, the electrode can be deformed by external force. If a part of the electrode surface is separated from the ion exchange membrane, the current will be concentrated in other parts and the ion exchange membrane will be easily damaged.

The present inventor elastically brings the electrode into close contact with the ion exchange membrane using a conductive spring connected to the frame-shaped electrode terminal.
This invention relates to an electrode for electrolysis that absorbs deformation of the electrode due to external force and that keeps the electrode surface in close contact with the ion exchange membrane at all times.

That is, the present invention provides an electrode body comprising a frame-shaped electrode terminal and a mesh-shaped electrode located inside the electrode terminal, in which the inner edge of the electrode terminal and the edge of the mesh-shaped electrode are connected to the mesh-shaped electrode. This is an electrode body for electrolysis in which the electrode surface of the mesh-shaped electrode is brought into close contact with the ion exchange membrane by connecting the electrode surface with a conductive spring that urges the electrode surface in a direction perpendicular to the electrode surface.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

FIG. 1 is a front view showing an embodiment of the electrolytic electrode assembly according to the present invention, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is an enlarged cross-sectional view of main parts. , FIG. 4 is a cross-sectional view showing the state in which the electrolytic electrode body of FIGS. 1 to 3 is brought into close contact with an ion exchange membrane.

1 is a frame-shaped electrode terminal made of conductive material;
A power supply terminal 2 is attached to one side edge of the electrode terminal 1.
are installed in succession. Reference numeral 3 denotes a pair of left and right conductive springs in the form of pipes that face in the vertical direction and have a portion cut out; one end of the conductive springs 3 is firmly fixed by welding or the like to the left and right inner edges of the electrode terminal 1. has been done. A stopper 4 is fixed to the other end of the conductive spring 3 so that its tips are aligned from the outside, and a mesh-like electrode 5 is installed between the pair of left and right stoppers 4.

The strength of the conductive spring 3 in the states shown in FIGS. 1 to 3 is mesh-like 'WI! , so that the pole 5 is located slightly forward of the flat surface 6 of the electrode terminal 1.

A pair! When the Th terminal 1 is pressed against the ion exchange membrane 7 so that the mesh-like electrode 5 faces, the conductive spring 3 deforms and the mesh-like electrode 5
The flat part 6 of the electrode terminal 1 is in close contact with the ion exchange membrane 7 12, and the mesh-like electrode 5 is a deformed conductive spring 5.
The ion exchange membrane 7 is biased by the elastic force of the ion exchange membrane 7 . Therefore, even if the mesh electrode 5 is deformed by an external force, the deformation is absorbed by the elastic force of the conductive spring 3, and the mesh electrode 5 is always in close contact with the ion exchange membrane 7.

In the present invention, the inner edge of the electrode terminal and the edge of the mesh-like electrode are connected by a conductive spring that urges the mesh-like electrode in a direction perpendicular to the electrode surface, and the mesh-like electrode connects the pair of electrode terminals. When pressed against the ion-exchange membrane so that they face each other, the mesh-like electrode elastically adheres to the ion-exchange membrane, so that the adhesion between the two becomes complete, and
Even if the mesh-like electrode deforms, the deformation is absorbed, so a gap is created between the mesh-like electrode and the ion exchange membrane, and the ion exchange membrane is not damaged due to current concentration.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the electrolytic electrode assembly according to the present invention, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is an enlarged cross-sectional view of main parts. , FIG. 4 is a cross-sectional view showing the state in which the electrolytic electrode body of FIGS. 1 to 3 is brought into close contact with an ion exchange membrane. 1... Electrode terminal 3... Conductive spring 5... Mesh-like electrode 7... Ion exchange membrane lice, bu Figure

Claims (2)

[Claims] (1) In an electrode body consisting of a frame-shaped electrode terminal and a mesh-shaped electrode located inside the electrode terminal, the inner edge of the electrode terminal and the edge of the mesh-shaped electrode are connected to the mesh-shaped electrode. An electrode body for electrolysis in ion exchange farming, characterized in that the electrode body is connected by a conductive spring that biases the membrane in a direction perpendicular to the electrode surface, and the electrode surface of the mesh-like electrode is brought into close contact with an ion exchange membrane. (2) The electrolytic electrode body according to claim (1), wherein the conductive spring has a pipe shape with a portion cut out.