Sodium hypochlorite generating device

By using a combination of highly crystalline nanoporous materials and positively charged membranes in the sodium hypochlorite generator, the problems of low current efficiency, high salt consumption, and high energy consumption were solved, achieving stable and efficient operation of the device and long service life of the electrodes.

CN121496428BActive Publication Date: 2026-04-14HANGZHOU WATER TREATMENT TECH DEV CENT
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Patent Information

Application Number
CN202610036760.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-13
Publication Date
2026-04-14
Estimated Expiration
2046-01-13

AI Technical Summary

Technical Problem

Existing sodium hypochlorite generators suffer from low current efficiency, high salt consumption, high energy consumption, and unstable operation, making long-term stable operation impossible.

Method used

Highly crystalline nanoporous materials are loaded onto the surface of the anode plate and combined with a positively charged membrane and a selective ion exchange membrane to construct the anode and cathode chambers of the electrolytic cell. Through electrostatic interaction and the synergistic effect of the porous materials, the deposition of calcium and magnesium ions and organic pollutants is inhibited, the current efficiency is improved, and the salt consumption and energy consumption are reduced.

Benefits of technology

It significantly improves current efficiency, reduces salt and energy consumption, ensures long-term stable operation of the device, extends electrode lifespan, and enhances the stability and efficiency of the electrolysis process.

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Abstract

The application belongs to the field of drinking water treatment and particularly relates to a sodium hypochlorite generating device, which comprises a brine tank, a sodium hypochlorite tank and an electrolytic cell in communication with the brine tank and the sodium hypochlorite tank respectively. An anode plate, a first partition plate, a selective ion exchange membrane, a second partition plate and a cathode plate are sequentially arranged in the electrolytic cell. A porous layer is arranged on the surface of the anode plate, and a high-crystalline nanoporous material obtained by reacting a metal salt with tetra(4-(aminopyrazol-3-yl)phenyl)ethylene is loaded in the porous layer. The selective ion exchange membrane is a sulfonated polyphenyl ether membrane containing sodium polystyrene sulfonate and polytriphenylphosphonium. A positively charged membrane is arranged on the surface of the cathode plate, and the positively charged membrane comprises a base membrane and a polyallylamine hydrochloride layer arranged on the surface of the base membrane. Through the synergistic effect of the anode antifouling, the cathode scale prevention and the high-selectivity ion exchange membrane, the current efficiency is significantly improved, the salt consumption and the energy consumption are reduced, and the efficient and stable preparation of sodium hypochlorite disinfectant is realized.
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