Pyrolysis has been widely utilized to achieve resource recovery of waste tires by attaining oil and carbon black. However, due to the stacking effect of fixed bed, the heat and mass transfer is insufficient during the pyrolysis process of waste tires. Additionally, the harmful N/S/Cl pollutants and heavy metals are inevitable that has been ignored. This paper systematically studied the effect of promoting heat and mass transfer on the oil quality and pollutant releasing characteristics during the pyrolysis of waste tires. A fixed bed pyrolizer with multifunction was innovatively designed to conduct fast pyrolysis by equipping an intermittent feeder and slow pyrolysis by equipping an agitator. Fast pyrolysis with feeding step by step and slow pyrolysis with stirring could promote the heat and mass transfer, which was firstly researched in lab-scale reactor. The experimental results demonstrated that slow pyrolysis with stirring was recommended with the target of acquiring pyrolytic oil. Promoting heat and mass transfer could improve the quality of oil and increase the retaining proportion of S in char during both fast and slow pyrolysis. The combustion of pyrolysis oil and gas generated more dioxins (0.6 ng/g_wt) than the total dioxins in pyrolytic gas and oil (0.06 ng/g_wt).

热解已被广泛用于通过获得油和炭黑来实现废轮胎的资源回收。但由于固定床的堆积效应，废轮胎热解过程中传热传质不足。此外，有害的 N/S/Cl 污染物和重金属是不可避免的，被忽视了。本文系统研究了废轮胎热解过程中促进传热传质对油品质量及污染物释放特性的影响。创新设计了多功能固定床热解器，通过配备间歇进料器进行快速热解，通过配备搅拌器进行慢速热解。分步进料快速热解和搅拌下慢速热解可促进传热传质，这首先是在实验室规模的反应堆中进行研究的。实验结果表明，以获取热解油为目标，建议采用搅拌缓慢热解。促进传热传质可以提高油品质量，提高快慢热解过程中硫在焦炭中的保留比例。裂解油气燃烧产生更多的二恶英（0.6 ng/g _wt ) 比热解气和油中的总二恶英 (0.06  ng/g _wt )。