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Diffusion electrode alkali producing device

A diffusion electrode and cathode technology, applied in the direction of electrolysis process, electrolysis components, cells, etc., can solve the problems of low-carbon environmental protection, high power consumption, etc.

Inactive Publication Date: 2011-04-27
BLUESTAR BEIJING CHEM MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The present invention designs a diffusion electrode soda production device, which solves the technical problem that domestic soda production has a diaphragm method and an ion membrane method that consume too much power, which does not meet the current low-carbon and environmental protection requirements

Method used

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Embodiment Construction

[0037] Combine below Figure 1 to Figure 5 , the present invention is further described:

[0038] A diffusion electrode alkali production device, mainly including the anode of the ion membrane electrolyzer and the cathode of the ion membrane electrolyzer, one or more gas chambers 1 and one or more liquid chambers 2 are arranged on the cathode side of the ion membrane electrolyzer , sending oxygen to the gas chamber 1, the purity of the oxygen sent to the gas chamber 1 is at least 94%. An oxygen cathode diffusion electrode 7 is arranged between the gas chamber 1 and the liquid chamber 2, and oxygen passes through the oxygen cathode diffusion electrode 7 to interact with H 2 O together transforms into OH - Enter the catholyte chamber 2, so that NaOH is generated in the catholyte chamber 2, while there is no H in the cathode of the ion-exchange membrane electrolyzer 2 Precipitate.

[0039] The overall reaction of this electrode process changes to:

[0040] 2NaCl+H 2 O+1 / 2O ...

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Abstract

The invention relates to a diffusion electrode alkali producing device, which mainly comprises an anode of an ion film electrolytic tank and a cathode of the ion film electrolytic tank, wherein one or more gas chambers and one or more fluid chambers are arranged at one side of the cathode of the ion film electrolytic tank; oxygen gas is conveyed to the gas chamber; an oxygen cathode diffusion electrode is arranged between the gas chamber and the liquid chamber; the oxygen gas and H2O are together converted to OH- to be transferred to the cathode fluid chamber through the effect of the oxygen cathode diffusion electrode, and further NaOH is generated in the cathode fluid chamber; and meanwhile no H2 in the cathode of the ion film electrolytic tank is separated. Because the chemical reaction of 2H2O+1 / 2O2 +2e=2OH- exists in the cathode of the alkali producing device, the decomposition voltage is reduced by 1.22V and estimated by a standard electric potential, and more than 56% electricity can be saved.

Description

technical field [0001] The invention relates to an alkali-making device, in particular to an alkali-making device using an oxygen cathode diffusion electrode. Background technique [0002] The chlor-alkali industry produces caustic soda and chlorine through electrolysis of salt water, and at the same time by-produces hydrogen. It is a basic chemical raw material industry that occupies an important position in the national economy. At present, there are diaphragm method and ionic membrane method in domestic soda production, and the cost of electricity consumption accounts for about 60% of the production cost. In a sense, reducing electricity consumption is the decisive factor to improve the economic benefits of the chlor-alkali industry. [0003] Specifically, the chlor-alkali plant produces 1 ton of caustic soda, by-products 0.886 tons of chlorine and more than 1,200 cubic meters of hydrogen, and consumes about 2,500 kWh. %. Over the years, people have transformed graphite...

Claims

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Application Information

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IPC IPC(8): C25B1/46C25B9/06C25B9/17
Inventor 张良虎王建军李海要王浩赵印杰郭立德覃事永
Owner BLUESTAR BEIJING CHEM MACHINERY
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