RESEARCH ON HOLLOW AUGER SERIES PYROLYZER AND PRODUCT CHARACTERISTIC OF WASTE TIRES COUPLED WITH COAL-FIRE UNIT

Based on the self-designed hollow auger series pyrolyzer (HASP) for waste tires in pilot scale, continuous operation experiments were carried out to analyze the stability and characteristics of products, as well as the reliability of production coupling with coal-fired units. Series pyrolysis technology and circulating spray condensation technology of pyrolysis oil were adopted to achieve stable control of pyrolysis carbon black, pyrolysis oil, and pyrolysis non-condensing gas yield in pilot pyrolysis plants. It can obtain high quality carbon black with toluene transmittance at 99%, and achieve effective separation of oils in different flash points. The non-condensing gas generated from the pyrolysis of waste tires can maintain the thermal self-sustaining operation of the plant and significantly reduce the energy input requirement during the pyrolysis process. The low flash point oil and surplus non-condensing gas were used as coupling alternative fuels for coal-fired units to reduce coal consumption and the low pollutant and carbon emissions. The experimental results proved the feasibility and reliability of the continuous, efficient, and stable operation of HASP coupled with coal-fired units, which was conducive to the popularization and application of large-scale production of waste tire pyrolysis installations.