The process of waste tyre pyrolysis involves converting waste tires into valuable products such as fuel oil, carbon black, steel wire, and gas through a controlled heating process in the absence of oxygen.
This method is an effective recycling solution for waste tires, offering a high recovery rate and minimal environmental impact.
4 Key Steps to Convert Waste into Valuable Products
Preparation of Tires
Tires are prepared for pyrolysis by removing steel wires and shredding them into smaller pieces.
This step is crucial for continuous and semi-continuous pyrolysis plants to facilitate the pyrolysis process.
Feeding
The shredded tires are automatically fed into the pyrolysis reactor using a sealed screw conveyor, ensuring safety and environmental protection.
This process is controlled by a PLC system, which enhances automation and reduces labor costs.
Heating
The reactor is heated using various fuels such as fuel oil, natural gas, wood, or LPG.
As the tires reach a specific temperature, they undergo pyrolytic reactions, producing oil gas.
The PLC system precisely controls the temperature to optimize oil yield.
Condensation and Separation
The oil gas is condensed into liquid tire oil, while other products like carbon black and gas are also collected.
The steel wire remnants from the tires are separated and can be recycled.
Detailed Explanation
Preparation of Tires
Initially, the steel wires are extracted from the tires using a wire drawing machine.
This step is followed by shredding the tires into smaller pieces using a tire shredder.
Shredding is essential for continuous pyrolysis plants as it facilitates the pyrolysis process by increasing the surface area of the material exposed to heat.
Feeding
The prepared tire pieces are then fed into the pyrolysis reactor.
This is done automatically using a sealed screw conveyor, which prevents any environmental contamination and ensures safety.
The feeding process is highly automated, controlled by a PLC system, which not only reduces labor costs but also ensures continuous operation.
Heating
The reactor is heated to initiate the pyrolysis process.
The choice of fuel can vary, but the goal is to heat the reactor sufficiently to cause the tires to decompose.
As the temperature rises, the rubber polymers in the tires soften and disintegrate into smaller molecules, which vaporize and exit the reactor as oil gas.
Condensation and Separation
The oil gas is then condensed into liquid tire oil, which can be further refined into diesel.
Other byproducts such as carbon black and gas are also collected.
The remaining solid materials, primarily steel wires, are separated and can be recycled.
This process is designed to be clean, with minimal emissions or waste, making it an environmentally friendly method of waste tire disposal and recycling.
This process not only helps in managing waste tires but also converts them into useful products, thereby contributing to resource conservation and environmental sustainability.
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