Tyre pyrolysis oil is a valuable product made from waste tires. This process turns old tires into useful materials like oil, carbon black, and steel wires.
4 Key Steps in Manufacturing Tyre Pyrolysis Oil
Step 1: Shredding and Feeding
The first step is to shred waste tires into small pieces, usually 3-5 cm in size. This is done using a waste tyre shredder.
The shredded tires are then fed into a pyrolysis reactor. This can be done manually or automatically using systems like belt conveyors, hydraulic feeders, or auto screw feeders.
The feeding process is designed to ensure safety and environmental protection. The entire operation is controlled by a PLC system for high automation and efficiency.
Step 2: Heating and Pyrolysis
Once the reactor is loaded with shredded tires, it is sealed and heated. The choice of fuel for heating can vary, including options like fuel oil, natural gas, wood, or LPG.
The initial heating phase starts at around 150 degrees Celsius, which takes about 2 hours to reach. At this temperature, the reactor begins to produce oil gas.
The temperature is then increased to between 260°C and 280°C, where it is maintained for 6-12 hours to ensure complete pyrolysis. During this high-temperature pyrolysis, the small molecules in the tires volatilize, and the tires melt into a liquid state, ultimately producing gas.
Step 3: Condensing and Refining
The oil gas produced during pyrolysis is then processed through a series of steps to condense and refine it into usable pyrolysis oil.
The non-condensable gas is first passed through a Gas-Scrubber for desulfurization and cleaning, then stored in a gas pressure tank. This gas can be used for electrical energy generation or sold for other uses.
The condensable hydrocarbons are collected as pyrolysis oil, which undergoes filtration to remove impurities. The refined oil can be used as heating oil, for power generation, hydrogen production, or further processed to make diesel.
Step 4: Conclusion
The tyre pyrolysis process is an effective method for recycling waste tires, providing a sustainable solution to the problem of tire disposal while also producing valuable by-products.
The process is highly automated and can be scaled to various capacities, making it a versatile and environmentally friendly option for waste management in the tire industry.
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