Vacuum cracking system for waste salt

Abstract

The invention discloses a vacuum cracking system for waste salt. The vacuum cracking system comprises a waste salt pretreatment system, a cracking system, a cracking gas treatment system, a hot blaststove system, a flue gas treatment system and a salt discharge system, wherein the waste salt pretreatment system is used for feeding and conveying raw waste salt and conveying the raw waste salt intothe cracking system; the cracking system is used for carrying out vacuum pyrolysis on the waste salt; the hot blast stove system is used for providing high-temperature heating flue gas for the cracking gas treatment system; the cracking gas treatment system is used for purifying cracking gas generated in the cracking process and feeding the treated cracking gas into a hot air system to be recycled as a fuel; the flue gas treatment system is used for treating heating flue gas obtained after cracking and performing up-to-standard emission on the flue gas; and the salt discharging system is usedfor discharging the cracked waste salt. Organic matters and other pyrolyzable harmful substances in the industrial waste salt are removed in a vacuum pyrolysis mode, and a waste salt treatment process with low energy consumption, high efficiency and high benefits is realized.

Description

technical field [0001] The invention relates to waste salt treatment technology, in particular to a waste salt vacuum cracking system. Background technique [0002] In recent years, with the rapid development of petrochemical, coal chemical, pesticide, pharmaceutical, food, printing and dyeing industries, the high-salt wastewater generated in the production process has also increased year by year. In order to facilitate subsequent treatment, most of this industrial wastewater will be concentrated and crystallized to obtain solid waste salt, and the waste salt produced by such industrial wastewater exceeds 10 million tons. Due to the treatment process, the obtained solid waste salt often contains organic matter and other degradable or pyrolyzed substances, which cause such waste salt to be corrosive, toxic, flammable, reactive and dangerous. If such waste salt is not disposed of in advance to remove organic matter and other toxic factors, it will bring huge problems to the s...

AI Technical Summary

Problems solved by technology

[0007] Based on the comprehensive analysis of the above four schemes, the first scheme is more difficult for the treatment of high-salt wastewater, and the domestication of salt-tolerant bacteria is even more difficult, which makes it difficult to effectively promote the large-scale industrial treatment of such wastewater; The two schemes are relatively thorough in treatment, but there are disadvantages such as high energy consumption, easy decomposition or agglomeration of some salts under high temperature incineration, which also leads to high treatment costs, and the color of waste salt after treatment is not correct; the third scheme The scheme is still difficult to deal with small molecules and low molecular weight organics, and the disposal of concentrated water after membrane separation is still a problem; the fourth scheme has incomplete adsorption, complicated process, high treatment cost, and resin or activated carbon. Disposal of waste solid or hazardous waste formed after failure is still a difficult problem

Images