Because tires contain large amounts of carbon, hydrogen and other elements of high calorific value, so there is gas, liquid oil products of pyrolysis of waste tires, carbon black. Pyrolysis gases including carbon monoxide, hydrogen, nitrogen and a small amount of methane, ethane and hydrogen sulfide. The calorific value of gas and natural gas, can be used as fuel. Pyrolysis-derived oils for fuel, can also be FCCfeedstock, producing high-quality petrol. Pyrolytic carbon can be used to producerubber and asphalt mixtures, paving the way for a general good effect of asphaltpaving. Preparation of activated carbon from the carbon black, used in water treatment agent.
Waste tire pyrolysis and some effective ways
Preparation of liquid fuel
Waste tire broken into small particles of about 100mm in diameter, without removing the wire into the pyrolysis furnace together. Pyrolising stoves are hot, generated by the use of gas heating with feeding screw from the outside response piping,thermal decomposition of plastic blocks and using decompression to exclude oil and gas quickly. Helical feed reaction pipe external heated closed device, so this process no pollution, oil properties are shown in table 2. As the sulphur removal in oil, or adding antioxidant used as fuel oil.
Preparation of carbon black
Japan Hyogo State experimental farm by Kobe steel, designed to waste tire thermal decomposition recycling carbon black, set up a waste tire processing equipment, handling tire 7000t, 2100t recycling carbon black, oil-2800t, scrap 350t, there is flammable gas. The way using external heat back to the converter. Through the common to recycle carbon black, carbon black and high abrasion furnace black, you can see that recycled carbon black and commercial carbon black different attributevalues, but its complex than general purpose carbon black has a higher reinforcement, with high abrasion furnace black-phase approximation. Recycled carbon black is a new type of reinforcing agents. Combined with recycled carbon black can meet the General requirements for rubber products, and achieved good economic benefits.
Preparation of activated carbon
Stonebridge tire company analysis of thermal decomposition of residues generated by the carbon content of waste tires: CB 80%~90%, minerals (zinc sulfide) 8%~12%, organic 3%~10%, there is also a small amount of rubber and fiber resin compounds and carbonization. Carbon and charcoal residue is first crushed and then proportionally in conjunction with asphalt, mixing into the Rotary carbonization furnace, volatile composition in the temperature dropped, then go for activating furnace, 800~900℃ access to steam, giving activity, finally got activated carbon product.The failure strength of activated carbon with high, sell sugar decolorizing ability, regeneration of absorption regeneration speed, performance, loss, resilience, products for sale, and the same adsorption.
Pyrolysis of waste tires has a unique advantage (such as can be made for transportation of oil and carbon black), but because the tires in the manufacturing processhas a lot of additives such as antioxidants, curing agents, such as y, not only certain pollution to the environment in the process of pyrolysis (hydrogen sulfide), andpyrolysis fuel oil high sulphur content. Pyrolytic carbon black high ash content, thatprevented them widely. Waste tire pyrolysis is the integration of a series of relatedtechnologies in the environmental protection industry, how to develop without secondary pollution of waste tire pyrolysis technology, is an urgent problem to solve.