Continuous segmented cracking equipment and technology used for waste and old tyres and capable of preventing generation of dioxin

Abstract

The invention provides a continuous segmented cracking equipment and a technology used for waste and old tyres and capable of preventing generation of dioxin. The equipment comprises a raw material bin, a mixing feeding screw conveyor, a preheating furnace, a continuous thermal cracking device and an oil gas recovery device; the raw material bin is successively connected with the mixing feeding screw conveyor, the preheating furnace and the continuous cracking device; the preheating furnace successively comprises a heating segment, a sealing segment, a forward pushing segment and a discharging segment along the flowing direction of a raw material, the heating segment and the forward pushing segment are both provided with a screw pusher, and the screwing direction of the screw pushers in the heating segment and in the forward pushing segment are same, and the sealing segment is not provided with a screw pusher; and the continuous cracking device successively comprises a first cracking unit with the heating temperature of 340-360 DEG C, a second cracking unit with the heating temperature of 440-460 DEG C and a third cracking unit with the heating temperature of 540-560 DEG C. The equipment and the technology are capable of effectively preventing generation of dioxin in the process of processing waste and old tyres, improving the activity and the quality of carbon black, and realizing continuous cracking production of waste and old tyres.

Description

technical field [0001] The invention relates to the technical field of waste tire treatment, in particular to a continuous and segmented waste tire cracking equipment and process for preventing dioxin production. Background technique [0002] The thermal cracking of waste tires is the last key step in the comprehensive utilization of waste tires and turning waste into treasure. For a long time, it has received great attention from all walks of life, and many researchers have done a lot of research and experimental work for it. However, due to various reasons, an ideal large-scale, industrialized, continuous production line that meets environmental protection requirements and is economically feasible has not yet been formed. So far, the existing pyrolysis furnaces capable of continuous production focus on the separation of oil for the cracking of waste tires, and the quality of the finally obtained carbon black is not ideal, while the intermittent production pyrolysis furnac...

AI Technical Summary

Problems solved by technology

So far, the existing pyrolysis furnaces capable of continuous production focus on the separation of oil for the cracking of waste tires, and the quality of the finally obtained carbon black is not ideal. The comprehensive performance of black is close to the performance of N660, but because of the inability to carry out continuous production, there are still problems such as energy waste, environmental pollution and high cost

[0003] In addition, at present, batch-type rotary cracking furnaces and continuous rotary cracking furnaces are often used to pyrolyze waste tires to realize the recycling of waste tires. Part of the air is introduced, so that the intermediate products (such as benzene, chlorine, chlorobenzene, etc.) produced during the tire cracking process will react with the air brought in to form dioxins

Dioxins are chlorine-containing organic compounds containing 2 or 1 oxygen linking 2 benzene rings, which are highly toxic and extremely harmful to the environment and human body.

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