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Method for installing and sealing oxygen diffusion electrode of ionic membrane electrolytic cell

A technology of oxygen diffusion electrode and ion membrane electrolytic cell, which is applied in the field of electrolysis and achieves the effects of cost saving, strong corrosion resistance to concentrated alkali, and convenient installation.

Active Publication Date: 2013-12-11
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the key technical problems of the installation and sealing of the large-scale oxygen diffusion electrode with a size not exceeding 1.2m×2.4m in the frame of the ion-exchange membrane electrolyzer, and proposes an oxygen diffusion electrode that is easy to install and reliable in sealing. The loading method in the membrane electrolyzer solves one of the key technical problems in the industrial application of oxygen cathode technology

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  • Method for installing and sealing oxygen diffusion electrode of ionic membrane electrolytic cell
  • Method for installing and sealing oxygen diffusion electrode of ionic membrane electrolytic cell

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Embodiment 1

[0016] For the installation and sealing method of a single electrode (1.2m×2.4m), see the attached figure 1 . First, at 5-10cm of the frame edge of the traditional ion-exchange membrane electrolyzer, weld a circle of right-angled nickel ribs ①, (welding the bottom of the angled nickel ribs on the frame) and then on the ribs ① The upper surface of the outer side is coated with a silicone-epoxy primer layer, and then a silicone rubber adhesive layer is coated on the primer layer; secondly, the oxygen diffusion electrode ② needs to be bonded with a rectangular nickel rib ① The combined part is coated with a silicone-epoxy primer layer, and then a silicone rubber adhesive layer is coated on the primer layer; thirdly, the oxygen diffusion electrode ② is bonded to the angled nickel rib plate ① On the upper surface, cure for 24 hours; Fourth, coat the inner surface of the angular nickel cover plate ③ with a silicone-epoxy primer layer, then coat the silicone rubber adhesive layer, a...

Embodiment 2

[0018] For the installation and sealing method of the three small electrodes, see the attached figure 2 . Taking three small electrodes with an area of ​​1.2m×0.8m as an example, the specific splicing steps are as follows: On the side of the tank frame of the traditional ion-exchange membrane electrolyzer, at a distance of 5-10cm from the edge of the tank frame, weld a rectangular nickel rib ① rectangle frame, the outer edge of the rectangle measures 1.2m×0.8m, weld the bottom of the rectangular frame of the nickel rib plate to the groove frame, and then coat the outer surface of the rib plate ① with a layer of organic silicon-epoxy primer, Then coat the silicone rubber adhesive layer on the primer layer; secondly, coat the organic silicon rubber adhesive layer around the oxygen diffusion electrode ② with an area of ​​1.2m×0.8m that needs to be bonded with the rectangular nickel rib ①. Silicon-epoxy primer layer, and then coat the silicone rubber adhesive layer on the primer...

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Abstract

The invention discloses a method for installing and sealing an oxygen diffusion electrode of an ionic membrane electrolytic cell, belonging to the technical field of electrolysis. The method provided by the invention comprises the following steps of: firstly, welding an angle-shaped nickel rib plate (1) with a distance of 5-10 cm from the edge of a cell frame of the ionic membrane electrolytic cell; coating a primer layer on the surface at the outer side of the rib plate (1) and then coating an organic silicon rubber adhesive layer; secondly, coating the primer layer on the periphery of the oxygen diffusion electrode (2) and then coating the organic silicon rubber adhesive layer; thirdly, adhering the oxygen diffusion electrode (2) to the angle-shaped nickel rib plate (1) to be solidified; fourthly, respectively coating the primer layer and the organic silicon rubber adhesive layer on the surface at the inner side of an angle-shaped nickel cover plate (3) and then adhering the angle-shaped nickel cover plate (3) to the surface of the oxygen diffusion electrode; fifthly, welding the angle-shaped nickel cover plate (3) at the edge of the cell frame; and sixthly, filling a non-welding part between the angle-shaped nickel cover plate (3) and a cell frame slit with an organic silicon rubber adhesive and covering a finishing paint layer on the non-welding part. With the method provided by the invention, the installation is convenient, the cost is saved, the oxygen diffusion electrode can be effectively fixed, the sealing is reliable and the electrode resists concentrated alkaline corrosion.

Description

technical field [0001] The invention relates to an installation method and a sealing method for loading an oxygen diffusion electrode on an ion-exchange membrane electrolyzer, which is applied to the reconstruction of an electrolyzer on which an oxygen-diffusion electrode is loaded on an ion-exchange membrane electrolyzer frame and a new type of oxygen cathode ion-exchange membrane electrolyzer Manufacturing belongs to the technical field of electrolysis. Background technique [0002] The chlor-alkali industry is one of the pillar industries in the chemical industry and occupies a very important position in the national economy. However, this industry is a high-energy-consuming industry. For example, the total power consumption of the chlor-alkali industry in my country accounts for about 5% of the entire industrial electricity consumption, and the power consumption is extremely large. Therefore, this industry is one of the industries in my country where energy conservation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B9/00C25B9/06C25B1/46C25B9/17
Inventor 王峰张良虎刘景军李海要吉静覃事永李志林王建军
Owner BEIJING UNIV OF CHEM TECH