The by-products of tyre pyrolysis include fuel oil, uncondensable gas (combustible gas), carbon black, and steel wire. Each of these products varies in composition depending on the specific pyrolysis methods and conditions such as temperature.
Fuel Oil: During the pyrolysis process, the gas vaporized by the reactor is first cleaned of dust and other impurities, then cooled and stored in a condenser. After further filtering, refined oil is obtained. This pyrolysis oil is used as a liquid fuel in various industries such as cement kilns, paper mills, power plants, industrial furnaces, foundries, and boilers due to its high calorific value, low ash, residual carbon, and sulfur content.
Uncondensable Gas (Combustible Gas): The uncondensed gas produced during the process is further cooled and re-enters the reactor to burn again. This not only utilizes the gas effectively but also helps in saving fuel for the customers. The gas typically contains about 40% methane and is a valuable by-product that can be used for energy generation.
Carbon Black: The solid residue from the pyrolysis process, known as char, contains carbon black and inorganic matter. This carbon black can be used as a reinforcement in the rubber industry, as activated carbon, or as smokeless fuel. The quantity of carbon black produced per tire is approximately 380kg.
Steel Wire: The steel wire from the tires is drawn out and sorted after the combustion process in the reactor. This steel, which amounts to approximately 170kg per tire, can be recycled and reused in various industries.
The process of tyre pyrolysis is designed to be environmentally friendly, with waste gas filtration systems ensuring that the gas emitted during production meets stringent EU standards. The use of these by-products not only helps in managing waste tires but also contributes to sustainable practices by recycling valuable materials and energy.
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