Method for recovering and reutilizing industrial waste salt and apparatus thereof

Abstract

The invention discloses an art method and corresponding device for reclaiming and utilizing the industry waste salt within some easy volatile or dissociated organic impurity such as amine, phenols and ether. The harmful impurities such as amine, phenols and ether in the industrial waste can be thermal dissociated or volatilized using the multiple-layers disk heating-furnace with the heating arrangement and the corresponding art process, to reach the requirement of industrial salt. This method provides a effective approach for reclaiming and utilizing the industry waste salt within some easy volatile or dissociated organic impurity such as amine, phenols and ether.

Description

technical field [0001] The invention relates to a method and equipment for treating industrial waste salt containing harmful impurities such as amines, phenols, ethers, etc. The harmful impurities in the treated industrial waste salt can meet the requirements of industrial salt and achieve the purpose of recycling. Background technique [0002] In some organic chemical production, a large amount of waste salt will be produced, such as producing 1 ton of hydrazine hydrate to produce about 3 tons of waste salt, which contains a large amount of sodium chloride, sodium carbonate, and sodium hydroxide, but contains a small amount of amine; the production of 1 ton of furan phenol is about Produce 0.8 tons of waste salt. The waste salt mainly contains sodium chloride, but contains a small amount of organic impurities such as phenol and ether. These waste salts cannot be directly used in the chlor-alkali industry. At present, the factory can only store such waste salt in the open air...

AI Technical Summary

Problems solved by technology

[0002] In some organic chemical production, a large amount of waste salt will be produced, such as producing 1 ton of hydrazine hydrate to produce about 3 tons of waste salt, which contains a large amount of sodium chloride, sodium carbonate, and sodium hydroxide, but contains a small amount of amine; the production of 1 ton of furan phenol is about Produce 0.8 tons of waste salt. The waste salt mainly contains sodium chloride, but contains a small amount of organic impurities such as phenol and ether. These waste salts cannot be directly used in the chlor-alkali industry. At present, the factory can only store such waste salt in the open air for a long time or Direct discharge into rivers not only wastes a lot of resources, but also causes serious pollution to the environment

There are reports in the literature on the use of water washing to treat waste salt and the use of rotary kilns to treat waste salt, but they have not been industrialized due to high cost or impurity content after treatment that meets the requirements of the chlor-alkali industry.

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