Waste tire refining sounds very mysterious, tires and oil are two unrelated substances. This is not the case. Tires are mainly composed of rubber (including natural rubber, synthetic rubber), carbon black and a variety of organic and inorganic additives (including plasticizers, antioxidants, sulfur and zinc oxide, etc.). The pyrolysis of waste tires refers to the process of polymer fracture with unsaturated bonds in the main chain of rubber under anaerobic or anoxic conditions and appropriate temperatures, and the products are mainly monomers, dimers and fragments, and the products are repolymerized into a variety of olefins, so as to remove volatile substances and form solid carbon.
Through pyrolysis, a waste tire can be 'turned into' 40% primary oil, 30% environmentally friendly carbon black, 20% steel wire and about 10% combustible gasAt the same time, the factory adopts domestic independent research and development, domestic leading dust removal and odor removal equipment, and carries out harmless treatment of harmful substances, which completely solves the problem of secondary pollution caused by waste rubber. ”
The tyre pyrolysis temperature is 200 450, the pyrolysis furnace adopts external heating, micro negative pressure, oxygen-poor pyrolysis process operation, the furnace body is closed, and the gas is not leaked in the production process, and the pyrolysis efficiency is improved, and the unsafe hidden dangers and secondary pollution caused by gas leakage in the production process are fundamentally eliminated.
The waste tire pyrolysis equation is as follows:
ch2-ch2-）n → n[c+h2+ch4+c2h6+c3h8+c4h10+c5h12+…+c11h24+…c20h42+…]
Note: C5H12 C11H24 is the gasoline fraction, C12H26 C20H42 is the diesel fraction, and C20 or more is heavy oil).
1.Pre-treatment – The wire drawing machine pulls out the steel wire in the tire. If necessary, it needs to be crushed into small pieces of 2-5 cm by a crusher after drawing (this step is required for continuous types);
2.Feeding - the screw feeder feeds the tire blocks into the reactor;
3.Pyrolysis – ignition of fuel in the combustion chamber to heat the reactor (fuel can be diesel, natural gas, etc.);When the internal temperature of the reactor reaches 160, oil and gas are generated and enter the gas bag
4.Oil-gas separation - In the gas bag, the heavy material in the oil and gas sinks and is liquefied into residue, which is stored in the residue tankLight oil and gas rise and enter the condenser evenly;In the condenser, the light oil gas is liquefied into fuel oil, which is stored in the light oil tankIn the water seal, the combustible gas is desulfurized and purified, and then used to provide heatIn the flue condenser, the hot smoke is cooled and cooled before entering the dedusting system. In the dust removal system, the flue gas can be safely discharged after four layers of filtration, including water washing, spraying, Boer porcelain ring adsorption and activated carbon adsorption
5.Slag removal – During this period, the carbon black is discharged through the automatic slag removal machine. Part of the steel wire in the tire block is also automatically discharged, and then through the magnetic separator, the steel wire and carbon black are separated and conveyed to the discharge bin.