Waste tyre processing method

Abstract

The waste type processing method includes three processes of tyre crushing, thermal cracking and carbon black crushing and packing. During the tyre crushing processes, waste type is first-crushed in pre-crusher and washed, and then crushed for the second time into rubber grains below 25 mm size. During the thermal cracking process, the rubber grains are thermally cracked in thermal cracking furnace at 480-700 deg.c and 0.01-0.04 MPa negative pressure, the gaseous product is condensated and cooled in washing tower to obtain fuel oil, the uncondensated light components is reused as fuel gas in the furnace and excessive inflammable gas is for heat energy conversion to provide hot water. In the carbon black crushing and packing process, the mixed material of carbon black and steel wire obtained in the thermal cracking process is magnetic separated and the carbon black is ground and packed as product.

Description

Technical field: [0001] The invention relates to the field of rubber processing, in particular to a processing technology for waste rubber tires. Background technique: [0002] The process of processing waste tires in the prior art is mainly to peel off the rubber part of waste tires from steel wire and fiber materials, and then process them into reclaimed rubber and rubber powder for downgrading. There is also a thermal cracking method, and the rubber is catalyzed in mica sheets. Under the conditions of temperature of 230-240 degrees Celsius and pressure of 0.1-0.2Mpa, it can be cracked to produce products such as combustible gas, fuel oil, carbon black, etc. Catalytic cracking to produce petroleum gas, gasoline, diesel and carbon black. Invention content: [0003] The technical problem to be solved by the present invention is: since the process of processing waste tires in the prior art is mainly to peel off the rubber part of waste tires from steel wire, fiber material...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: since the process of processing waste tires in the prior art is mainly to peel off the rubber part of waste tires from steel wire, fiber material, etc. and then process them into reclaimed rubber and rubber powder for downgrading, some use thermal cracking Treated by the method, the rubber is cracked under the catalysis of mica sheets at a temperature of 230-240 degrees Celsius and a pressure of 0.1-0.2Mpa to make combustible gas, fuel oil, carbon black and other products, or at normal pressure and medium temperature Catalytic cracking of activated dolomite, acidified talcs, etc. to produce petroleum gas, gasoline, diesel oil, and carbon black, etc. Fiber cords, steel cords are separated from rubber, which increases the labor intensity and production cost, and the recycling and separation are not complete, which wastes rubber resources, and because the thermal cracking process requires a certain working pressure, this not only increases the cost of the equipment and production costs, and increase the difficulty of operation and unsafe hidden dangers. At the same time, the thermal cracking process technology needs to add a certain catalyst, which will cause secondary pollution and affect the quality of the product. Moreover, the recovery of the dry gas produced is not perfect, and the recovered product oil Class, carbon black quality is poor, the added value of the product is low

Images