Chemical and Mechanical Recycling for Tire Sustainability

A continuous thermal cracking system and method for whole tires of waste tires that allows recycling of whole tires without the need for crushing them into blocks first. The system uses a preheating tank, thermal cracking reactor, and condensing system connected in a ring. The preheating tank has front and rear sections filled with water and oil respectively to heat the tires. The reactor has a sealing screw, front bin, internal kettle, and hot air heater. The condensing system separates heavy and light oil. The sealed preheating and reactor sections prevent volatile oil escape. The hot air heater preheats the kettle. This allows fully cracking the whole tires without crushing.

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A waste tire cracking system for efficiently and cleanly recycling end-of-life tires into useful products like carbon black and steel. The system uses a two-stage cracking furnace setup with preheating, separation, and condensation steps to maximize resource recovery. The first furnace cracks the tires to release the carbon black and steel. The second furnace further cracks the carbon black to increase yield. The condensers collect the water vapor and liquid condensates from the gases. The system also uses a spiral feeder to introduce the tires into the furnaces. This allows adjusting the feeding height based on tire composition. The system also has filters and exhaust ports to control emissions.

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A continuous, safe, and efficient method for treating and recycling waste tires using a closed steel belt furnace. The method involves non-catalytic thermal cracking of waste tire pieces in a continuous closed steel belt heating furnace under positive pressure. This allows continuous pyrolysis of tires at safe conditions, replacing intermittent small-batch production. The positive pressure prevents explosions and allows higher throughput and efficiency compared to open pyrolysis.

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Recycling worn tires and rubber products to obtain carbon-containing materials with improved properties for use in tire manufacturing. The recycling method involves mechanically crushing the tires, pyrolyzing them to form gases and solid residue, removing impurities, grinding the residue, classifying it into small and large fragments, further grinding the large fragments, and packaging the small fragments for use as filler in tires. The key steps are crushing tires before pyrolysis to remove metal beadlings, using a caulking inhibitor during pyrolysis, and finely grinding the residue to make carbon with low impurities and high surface activity suitable for tire rubber.

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Waste tire thermal decomposition system for recovering value from junked tires. It has a feeding mechanism to input tire fragments, a reactor for thermally decomposing the tires, a carbon black removing device, and a carbon black collecting device. The feeding mechanism uses hoppers, conveyors, and elevators to transport the tire fragments to the reactor. The carbon black removing device has a filtering device to separate the carbon black from the gases generated during decomposition. This allows capturing the carbon black as a valuable product. The system also features optimized feeding, filtering, and gas handling components like spiral baffles, scrapers, and venting to improve efficiency.

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A waste tire thermal splitting system that extracts useful products like rubber powder, oil, and gas from waste tires through pyrolysis. The system has stages like preheating, spiral squeezing, thermal cracking, refining, cyclone separation, condensing collection, and compression. It aims to efficiently process waste tires into reusable materials instead of burning or landfilling them, while avoiding pollution by capturing and purifying the gases. The system converts tires into products like rubber powder, oil, and gas through pyrolysis. It preheats the tires, squeezes them to extract oil, cracks them thermally to split into products, refines the rubber, separates solids and gases, condenses the gases, and compresses the rubber. This captures all the products and prevents pollution compared to direct burning or landfilling.

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A process for efficiently converting waste tires into useful products through pyrolysis. The process involves heating the tire crumbs to temperatures around 120°C in a specialized reactor. The reactor has a unique design with an inner tube and outer shell that contain the tire crumbs. The inner tube has small holes to break down the tire material into small pieces during pyrolysis. This produces a high yield of small, useful products from the tire rather than large chunks. The pyrolysis conditions are optimized for this reactor design to maximize the conversion of the tire into small fragments. The process also involves heating the reactor to temperature gradually to avoid damaging the reactor. This enables efficient and controlled pyrolysis of tires into useful products.

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Recycling end-of-life tires using microwave pyrolysis to produce valuable products like oils, gases, and carbon. The process involves heating the tires in a microwave reactor to temperatures around 500-600°C. The microwaves selectively heat the carbon black in the tires, causing it to pyrolyze and release oils, gases, and carbon. The oils have low sulfur content and high distillable hydrocarbon fractions, making them suitable for fuels. The process parameters like pyrolysis rate and heating rate can be optimized to achieve the desired oil properties.

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A method for efficiently handling junked tires using a specialized machine. The machine has a rotating wheel hub with grooves to load tires from below. The tires are pyrolyzed in a chamber with heating zones. Pyrolysis gas returns to participate in the reaction. This allows complete breakdown of the tires into valuable products. The machine also has a gas jet group to supply gas for the pyrolysis. The rotating wheel hub design enables efficient loading of whole tires or tire powder. The pyrolysis process reduces contamination compared to physical methods. It also has better automation, lower cost, lower waste, and lower environmental impact than existing methods.

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A process and furnace for treating tires to recover carbon black and generate energy. The process involves pyrolyzing tires at high temperature to convert the rubber into gas and separate carbon black. The pyrolysis is done in a furnace with a spout bed contact system that allows segregating the carbon black from the bed without removing the catalyst. The furnace also recirculates pyrolysis gas for heat input and uses the pyrolysis gas as fuel in a cogeneration system to produce electricity and thermal energy. The process recovers carbon black, reduces waste, and provides energy and materials from tire treatment.

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A more efficient and cleaner process for recycling scrap tires and composite materials like rubber-metal products. The process involves separating the metal components from the plastic components, pyrolyzing the plastics, extracting the pyrolysis gas and oil, and removing the carbon black and any remaining metal. This allows recycling the plastics separately from the metals, avoiding contamination issues and enabling higher quality recycling products. It also reduces energy consumption compared to co-pyrolysis of the metal and plastic components.

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A cleavage method for recycling junked tires that involves anoxic cracking using catalyst and nitrogen to prevent explosion. The method involves feeding whole tires and catalyst into an anoxic feeding warehouse filled with nitrogen. The nitrogen prevents oxygen from entering during cracking to prevent explosions. The tires and catalyst are heated and cracked in a separate chamber. The gases and liquids produced are separated. The method allows recycling junked tires without separating the rubber, steel, and fiber first, using an anoxic environment to prevent explosions, and adjusting catalyst dosage for better quality products.

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Disposing of waste tires and similar materials by pyrolysis in a fluidized bed furnace (SWSF) instead of incineration. The tires are fed into a reactor under nitrogen, heated to 850°C for 30-180 minutes, with heat from the SWSF. The pyrolysis gas and oil are extracted, condensed, and used as fuel. The residue is cooled and sent to the SWSF as fuel. This avoids air pollution and segregation issues of incineration. The SWSF provides heat for pyrolysis and generates electricity. The extracted heat is used for power generation or heat supply. The pyrolysis residue is removed and recycled.

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Improving the production of alternative fuels from worn tires and other rubber waste using a modified pyrolysis process that reduces idle time, eliminates caking and improves quality. The process involves chilling the residue before discharge, separating out metal and non-metal inclusions, crushing them, and then classifying into fractions. This modified sequence helps prevent caking and lumping of the residue. Additionally, using pyrolysis gas cleaned of impurities as fuel for the pyrolysis chamber instead of external sources.

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Cold quenching processing method for recycling waste tires that avoids the high energy costs and pollution issues of traditional tire recycling methods. The method involves melting and quenching the tires to separate the rubber from the steel. The tires are first softened by heating. Then they are quickly cooled in a liquid medium to shatter the rubber. This separates the rubber from the steel for easier recycling. The cooled rubber can be further processed while the steel is recycled separately. The melting and quenching steps allow efficient separation without high energy inputs or pollution from pyrolysis.

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Pyrolysis-based system for treating waste tires that converts them into useful products like fuel oil, methane gas, carbon black, and steel wire. The system involves feeding tires into a reaction chamber where they are pyrolyzed at high temperatures to decompose into the separate components. The compressed tires are mechanically shaped to fit the chamber. The pyrolysis gases are condensed to separate the oil and methane. The system efficiently converts tires into reusable products with reduced pollution compared to burning or landfilling.

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Improving the process of recycling worn tires by changing the technological scheme and operating conditions to obtain targeted hydrocarbon mixtures with reduced energy consumption compared to traditional tire pyrolysis. The improvement involves using a block for molecular destruction after the pyrolysis reactor. In this block, the gas stream from pyrolysis is regulated to preferentially produce desired hydrocarbon components. Condensation separates out the desired hydrocarbons, the gas is burned for heat, and the liquid returns to pyrolysis. This allows targeting specific hydrocarbon mixtures with lower energy compared to single-step pyrolysis.

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A continuous process for recycling worn tires that involves melting the rubber and steel cord in a bath of oil or other materials to soften the tires, then separating the rubber from the steel cord using a screw press. This allows high-throughput recycling of whole tires without the need for pre-shredding or segmentation. The softened rubber can be further processed into products like road bitumen or pyrolyzed into fuel. The steel cord remains can be used in steel recycling.

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Sealed continuous pyrolysis system for recycling waste tires that prevents external air from entering during the pyrolysis process. The system feeds finely chopped waste tires continuously into a sealed chamber where they decompose into carbon black, oil, and iron cores at low temperatures. This sealed operation prevents oxygen from entering and reduces secondary pollutant formation. The sealed pyrolysis allows higher quality carbon black, oil, and iron cores to be produced compared to open systems. After pyrolysis, the sealed system prevents secondary pollutant emissions by not discharging any residue.

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A process for recycling waste tire rubber using thermolysis in an inert atmosphere at atmospheric pressure to convert it into useful products like oils, carbon black, and gases. The process involves feeding chopped tire into a reactor, devolatilizing it at around 850°C to yield gases, oils, and carbonaceous material. The gases are condensed into saleable fractions like gasoline, kerosene, and gas oil. The carbon black is cooled and collected. The process is self-sufficient as the waste heat powers the plant.

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