Method for treating waste tire

Abstract

The invention relates to a method for treating waste tires, which comprises the following steps: the thermal decomposition of a waste tire is carried out at the airproof state and under the oxygen-free condition; the thermal decomposition temperature is divided into three sections, wherein the first section is close to a feeding end with the thermal decomposition temperature of 700-800 DEG C; the third section is close to a discharging end with the thermal decomposition temperature of 900-1000 DEG C, and the second section is arranged between the feeding end and the discharging end with the thermal decomposition temperature of 800-900 DEG C; mixed steams generated during the thermal decomposition of the tire are condensed to form liquid hydrocarbon and thermal decomposition gas, and the thermal decomposition gas circularly returns to a reactor and is used as fuel; and the solid products are separated to obtain metals and carbon black.

Description

technical field [0001] The invention relates to a method for recycling waste tires. Background technique [0002] With the development of the automobile industry and the transportation industry, the demand for various tires is increasing. my country is the world's largest rubber consumer, and it is also a big tire producer and tire consumer. Correspondingly, a lot of waste is also produced. Tires, so-called scrap tires, refer to tires that have been replaced or eliminated and have lost their use value as tires, as well as scrap tires produced by factories. A large number of waste tires have piled up and seriously polluted the environment, and our country is also facing increasing pressure. [0003] At present, the recycling of waste tires is mainly based on physical methods. These methods have the disadvantages of polluting the environment, imperfect technology, and poor operability to varying degrees. [0004] Some progress has also been made in the research on the crackin...

AI Technical Summary

Problems solved by technology

This method adopts the traditional method of heating the whole reactor at one temperature, but because the decomposition state of the tire is different at different positions during the falling process of the tire in the pyrolysis furnace, this method is obviously not conducive to the full cracking of the tire. The cracking efficiency is relatively low, which is not conducive to saving resources

And the discharge process of the solid product of this method is also difficult to ensure the sealing of the whole reaction system, which is easy to cause environmental pollution

[0006] From the above analysis, it can be seen that the overall technical level of the existing devices for processing waste tires is not obvious, the cost is high, the degree of automation is low, and a large amount of waste gas is generated, which causes great pollution to the environment

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