How are dioxins produced in the process of garbage incineration?

How are dioxins produced in the process of garbage incineration? Plastic bags, PVC (polyvinyl chloride) soft glue and other daily necessities all contain chlorine. When these things burn, they will release dioxins and suspend them in the air. Lead-containing gasoline, coal, wood after antiseptic treatment, petroleum products and various wastes, especially medical wastes, are prone to produce dioxins when the combustion temperature is lower than 300-400℃. The production process of PVC plastics, paper, chlorine gas and some pesticides, iron and steel smelting, high-temperature chlorine gas activation catalyst and other processes will release dioxins into the environment. Dioxins also exist as impurities in some pesticide products, such as pentachlorophenol, 2,4,5-T and so on.

At present, there are three main ways: 1. In the incineration process of chlorine-containing plastics such as vinyl chloride, the incineration temperature is lower than 800℃, and chlorine-containing garbage is not completely burned, which is easy to produce dioxins. Chlorobenzene is produced after combustion, which becomes the precursor of dioxin synthesis; 2. Other chlorine-containing and carbon-containing substances, such as paper, wood products, food residues, etc., are catalyzed by metal ions such as copper and cobalt to generate dioxins, without chlorobenzene. 3. It comes from the process of manufacturing chemicals including pesticides, especially chlorine-containing chemicals, such as pesticides, herbicides, wood preservatives, defoliants (used by the US military in the Vietnam War), polychlorinated biphenyls and other products.

In addition, if the TV set is not cleaned in time, dioxin bromide will usually be detected in the dust accumulated in the TV set.