Treatment system for waste salt recycling treatment and application thereof

Abstract

The invention relates to a treatment system for waste salt recycling treatment. The treatment system comprises a waste salt carbonization pyrolysis system, a coke-containing salt slag dissolving and filtering system and an evaporation and desalination system which are sequentially connected with one another, wherein the waste salt carbonization pyrolysis system can be used for carrying out carbonization pyrolysis treatment on waste salt I composed of sodium chloride monomer salt, sodium sulfate monomer salt or the mixed waste salt; the coke-containing salt slag dissolving and filtering systemcan be used for carrying out the dissolution and filtration operation on the coke-containing salt slag obtained after the treatment by the waste salt carbonization pyrolysis system; and the evaporation and desalination system can be used for carrying out the evaporation and concentration, fractional crystallization and drying treatment on strong brine obtained after the treatment by the coke-containing salt slag dissolving and filtering system, so that salt products are obtained. According to the treatment system, with the industrial waste salt as a raw material, organic pollutants are removedfrom the waste salt, desalination treatment is carried out on mixed inorganic salt, and finally the industrial secondary salt products are produced, such as anhydrous sodium sulfates, sodium chlorides, sodium bicarbonate and other finished salt, so that the recycling of the waste salt can be realized; and the system can be applied to the waste salt recycling treatment.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a treatment system for recycling waste salt and its application. Background technique [0002] Industrial waste salt mainly comes from coal chemical industry, pesticide, chemical fertilizer, biochemical industry and other industries. These industrial waste salts often cannot be reused in industrial production because they contain a certain amount of organic matter. The relevant national legal documents also classify these waste salts as dangerous waste. Waste salt is often complex in composition and highly toxic and harmful, which is a difficult point in the treatment of hazardous waste industries, and the treatment cost is extremely high. The treatment cost per ton is more than 3,500 yuan, which often brings a great burden to enterprises and also causes waste of resources. [0003] At present, domestic and foreign technologies for waste salt treatment are relativ...

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Problems solved by technology

This disposal method not only occupies a large amount of land, but also easily causes secondary pollution

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