Method and apparatus for continuous production of high-concentrated sodium hypochlorite

Abstract

The invention discloses a method to continual produce high-concentration sodium hypochlorite, which comprises: generating sodium hypochlorite solution, depositing for desalinization, and discharging salt. Wherein, the opposite device comprises a chloridization kettle inserted with two groups of inlet chlorine pipes, a group of subsiders in series, a salt mud tank, and a centrifuge. Wherein, the reaction kettle comprises a reaction area and a deposition area; forcing the qualified sodium hypochlorite supernatant into deposition slot through overflow port. This invention can keep the liquid level invariable and production continual, and has no pollution to environment.

Description

technical field

[0001] The invention relates to a production method for continuously producing high-concentration sodium hypochlorite by using sodium hydroxide and chlorine gas. Background technique

[0002] Sodium hypochlorite, with the chemical formula NaClO, is a yellow extremely unstable solid, soluble in water, and the aqueous solution is alkaline, and can gradually decompose into sodium chloride, sodium chlorate and oxygen. As a strong oxidizing agent, it is widely used in bleaching pulp and fabrics, as an oxidizing agent and water purifying agent, and is also the main raw material for the production of hydrazine hydrate.

[0003] The domestic production of sodium hypochlorite includes the continuous method of introducing foreign devices and technologies, lye chlorination method, bleaching part double decomposition method, tidbit reaction method, electrolysis method, etc. The conventional process of using dilute alkali as raw material and adding chlorine gas to produce...

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