Hazardous waste incineration
Hazardous waste is 1) having one or more hazardous characteristics such as corrosiveness, toxicity, flammability, reactivity or infectivity; 2) not excluding having hazardous characteristics that may cause harmful effects on the environment or human health and need to be managed according to hazardous waste. According to the 2016 edition of the national directory of hazardous wastes, the major categories of hazardous wastes are optimized and reduced. The hazardous wastes can be divided into 46 major categories and 479 species. Hazardous waste mainly includes industrial waste, municipal waste and medical waste. Among them, industrial waste accounts for more than 70% and medical waste accounts for about 14%. Among the industrial hazardous wastes, 30% are waste acid, 14% are waste alkali, 14% are asbestos waste and 10% are non-ferrous metal smelting waste. In the source industry, chemical raw materials and products manufacturing accounted for 19%, non-ferrous metal smelting accounted for 15%, waste metal mining accounted for 14%, and paper industry accounted for 13%.
The principle of hazardous waste treatment is harmless treatment and resource utilization. The basic treatment steps include classification, pretreatment and final disposal. Metal, oil, solvent, dye and other wastes with recycling value can be used as resources; pretreatment includes physical method, chemical method, physical and chemical solidification, and hazardous wastes after pretreatment can enter into harmless treatment process, mainly including incineration, landfill, physical and chemical treatment, and cement kiln collaborative treatment can also be listed as harmless treatment method.