Method for recycling sodium hypochlorite purifying liquid used for purifying acetylene gas

Abstract

The invention discloses a method for recycling sodium hypochlorite purifying liquid used for purifying acetylene gas. Low-pressure steam heating is carried out on waste sodium hypochlorite liquid after being subjected to acetylene purifying technology, and the waste sodium hypochlorite liquid is sent into a steam-water separator to ensure that the acetylene gas dissolved in the waste sodium hypochlorite liquid volatilizes completely, and the acetylene gas is sent into an acetylene cooler to be cooled and dehydrated, so as to achieve the aim of recycling the acetylene gas. The waste sodium hypochlorite liquid after removing the acetylene gas is subjected to gas stripping and flocculent settling, and supernatant liquid is sent into a fresh sodium hypochlorite configuration pipeline, so as to realize the recycle of the waste sodium hypochlorite liquid. The technology recycles the acetylene gas from the waste sodium hypochlorite liquid to the utmost extent, thereby not only reducing the consumption of raw material calcium carbide, but also saving water greatly, as waste water does not contain the acetylene gas which has the explosive risk when meeting chlorine, so the waste water can be reused for configuring the fresh sodium hypochlorite. The invention has the technical effects of saving energy, reducing consumption, reducing emission and protecting environment.

Description

Technical field: [0001] The invention relates to a method for recycling industrial waste water, in particular to a method for recycling sodium hypochlorite cleaning liquid in an acetylene gas cleaning process. Background technique: [0002] The acetylene production process includes the purification process of acetylene gas. Sodium hypochlorite cleaning solution is generally used to clean acetylene gas. The waste sodium hypochlorite liquid after the cleaning process contains a certain amount of acetylene gas and CL root, which is difficult to be used in other production processes without treatment, and can only be discharged outside, which brings a great burden to sewage treatment and increases the pressure on environmental protection ; On the other hand, the preparation of sodium hypochlorite needs a large amount of water again, which consumes a lot of water resources. Invention content: [0003] The object of the present invention is to provide a method for recycling wa...

AI Technical Summary

Problems solved by technology

The waste sodium hypochlorite liquid after the cleaning process contains a certain amount of acetylene gas and CL root, which is difficult to be used in other production processes without treatment, and can only be discharged outside, which brings a great burden to sewage treatment and increases the pressure on environmental protection ; On the other hand, the preparation of sodium hypochlorite requires a large amount of water, which consumes a lot of water resources

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