Will the waste tire cracking and refining project produce dioxins?


Conditions for producing dioxins:

Dioxins are mainly formed during the combustion process of chlorinated hydrocarbons, and oxygen, chlorine, and metal elements are essential conditions for the generation of dioxins. Among them, chlorine sources (such as PVC, chlorine gas, HCl, etc.) are precursors of dioxin production, and metal elements such as (Cu, Fe) are catalysts for dioxin production. When the combustion temperature is below 800 ℃ and the residence time of the flue gas is less than 2 seconds, some organic compounds in the combustion product will react with molecular chlorine or chlorine free radicals to generate dioxins.

Dioxin control measures for waste tire refining projects:

The waste tires processed by the waste tire cracking production line are automotive tires, mainly ordinary radial tires, excluding special tires and synthetic tires. The treated automobile tires do not contain Neoprene. Neoprene is mainly used in bicycle inner tubes. The proposed project will not treat bicycle inner tubes. The construction unit is required to strengthen management, strictly control the types of waste tires purchased, and conduct sampling inspection and analysis on the chlorine content of tires. Halogenated Butyl rubber tires shall not be collected to ensure that the cracked waste tires do not contain organic or inorganic chlorine.

Tire crackingTire cracking treatment site

There is no metal cation as catalyst in the cracking process of the waste tire oil refining project. The temperature of the Pyrolysis process is about 400 ℃. The cracking process is in an oxygen poor environment. The purified cracking gas enters the burner and burns to produce high-temperature flue gas to provide energy for the cracking of waste tires in the cracking furnace. Therefore, the cracking process does not have the conditions to generate dioxins.


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