Scrap Tire Pyrolysis Principle and Equipment Structure
The pyrolysis of scrap tires is mainly based on a thermal cracking process. In an oxygen-free or oxygen-deficient environment, high temperature induces cracking reactions of the rubber in scrap tires. The unsaturated macromolecular rubber hydrocarbons in the rubber break down into small-molecule hydrocarbon compounds, which then recombine to form a mixture of gaseous and liquid hydrocarbons.
The gaseous hydrocarbon mixture mainly consists of C1 to C4 compounds, while the liquid hydrocarbon mixture is a petroleum-like product. In addition to oil and gas, this process also generates by-products such as carbon black and steel wire.
Structure and Components
Feeding System
It is used to feed scrap tires into the pyrolysis reactor, and can adopt an automatic feeding mode, which saves more time and labor compared with manual feeding.
Reactor Cracking System
As the core of the entire equipment, it holds the scrap tires and heats the interior through external heating. After reaching the temperature required for tire cracking, it stably generates oil and gas. The system is composed of a thermal insulation layer, inner tank heating device, transmission device, cold air device, slag discharge device and other components.
Oil-gas Condensation and Recovery System
It collects the oil and gas generated by the upstream pyrolysis reactor, and recovers pyrolysis oil after condensation through a multi-stage oil-gas condensation system. It usually includes multiple condensers, oil-water separators and other equipment. Only with good cooling effect can a high oil yield be guaranteed.
Tail Gas Purification and Deodorization System
It purifies the non-condensable combustible gas produced after tire cracking, removes pungent and polluting sulfur-containing gases such as hydrogen sulfide and sulfur dioxide, and ensures that there is no odor in the production site.
Flue Gas Desulfurization and Purification System
It treats sulfide gases and solid particulates in the flue gas generated by the combustion of non-condensable gas, so that the flue gas can be discharged up to the standard.
Centralized Carbon Black Collection System
Through a fully enclosed pneumatic conveying pipeline, it centrally collects the carbon black remaining after tire cracking in the reactor into the silo, which improves collection efficiency and keeps the production site clean and sanitary.
