Harmless decomposition method for chlorine absorption product NaClO

Abstract

The invention relates to a harmless decomposition method for chlorine absorption product NaClO. At present, a method capable of really realizing efficient harmless decomposition of the chlorine absorption product NaClO does not exist. Equipment used in the invention comprises a NaClO decomposition tower, a flow control pump and a liquid storage tank, wherein a catalyst tower plate in the NaClO decomposition tower is filled with a catalyst, the catalyst is formed by mixing manganese dioxide and a synergist in any proportion, and the synergist is one or more than two of copper oxide, iron oxide, nickel oxide and cobalt oxide. The method comprises the following steps: enabling tail gas containing chlorine to enter the liquid storage tank and be absorbed by absorption liquid in the liquid storage tank, so that sodium hypochlorite waste liquor is generated, transporting the sodium hypochlorite waste liquor in the liquid storage tank into the NaClO decomposition tower, enabling the sodium hypochlorite waste liquor to pass through the catalyst tower plate layer by layer from bottom to top to be subjected to catalytic decomposition reaction with the catalyst, so that waste water with the sodium hypochlorite content reaching the standard is generated, and discharging the waste water. The harmless decomposition method provided by the invention can really realize efficient harmless decomposition.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a harmless decomposition method of chlorine gas absorption product NaClO. Background technique [0002] In a variety of industries that apply chlorine, especially in the production process of sponge titanium industry, a large amount of chlorine is generated or applied, so that the tail gas contains a certain amount of chlorine. Chlorine is a poisonous and harmful gas, which will cause serious pollution to the environment and seriously threaten human health. [0003] At present, lye, especially sodium hydroxide, is mainly used to absorb this chlorine-containing tail gas. Although the absorption efficiency of this type of method is relatively high, it can effectively prevent chlorine gas from leaking, but after using lye (sodium hydroxide) to absorb, another problem occurs. A kind of harmful substance sodium hypochlorite, sodium hypochlorite is unstable under common conditions, easily ...

AI Technical Summary

Problems solved by technology

In this treatment method, toxic chlorine gas is produced. Although chlorine gas can be recovered and treated, there is a risk of chlorine gas leakage and secondary pollution during the treatment process.

[0005] At present, there is no method that can truly realize the efficient and harmless decomposition of chlorine gas absorption product NaClO

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