Hazardous waste treatment system and method based on medium-temperature pyrolysis and plasma high-temperature melting

Abstract

The invention provides a hazardous waste treatment system and method based on medium-temperature pyrolysis and plasma high-temperature melting. The problems that existing hazardous waste incineration treatment is low in harmless degree, pyrolysis treatment is not thorough, and plasma melting treatment cost is high are solved. According to the system and method, hazardous waste is broken and then subjected to medium-temperature pyrolysis in an oxygen-deficient environment, pyrolytic carbon residues form harmless glass bodies through a plasma melting furnace, pyrolysis gas and smoke generated by plasma melting enter a combustion chamber to be subjected to secondary combustion, high-temperature smoke obtained after secondary combustion exchanges heat with air and then is cooled into medium-temperature smoke, the medium-temperature smoke is divided into two parts, one path enters a pyrolyzing furnace to heat materials, the other path enters a flue gas reheater to exchange heat, pyrolysis tail gas obtained after the materials in the pyrolyzing furnace are heated is mixed with flue gas obtained after heat exchange of the flue gas reheater, and after mixing, quenching cooling, dry-process deacidification, cloth bag dust removal, washing and reheating are conducted in sequence, and then a mixture is sent to a chimney to be discharged through an induced draft fan; and air is heated after heat exchange, is used as a heat source of a sand dryer, and is discharged after sand drying and cyclone dust removal.

Description

technical field [0001] The invention belongs to a solid waste treatment system, in particular to a hazardous waste treatment system and method based on medium-temperature pyrolysis and plasma high-temperature melting. Background technique [0002] With the continuous acceleration of industrialization and urbanization, the discharge of solid waste is increasing day by day, especially the chemical organic solid waste and medical solid waste discharged from petrochemical, medical, shipbuilding, smelting and other industries are highly corrosive and toxic. If directly Discharge into the environment will cause fatal harm to the human body and cause serious pollution to the environment. [0003] At present, the traditional solid hazardous waste treatment methods are safe landfill, incineration, etc. The purpose of safe landfill method is to cut off the connection between waste and the environment, so that it will no longer cause harm to the environment and human health. However, ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low harmless degree, incomplete pyrolysis treatment and high cost of plasma melting treatment in the existing hazardous waste incineration treatment, and provide a hazardous waste treatment system based on medium temperature pyrolysis and plasma high temperature melting. method

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