废旧高分子材料在回转窑内热解的研究──热解终温对热解产物的影响

INVESTIGATION OF PYROLYSIS OF WASTE PLASTICS IN A ROTARY KILN INFLUENCE OF FINAL PYROLYSIS TEMPERATURE ON PYROLYSIS PRODUCTS

以废旧高分子材料—ＰＥ塑料，ＰＶＣ塑料和废轮胎为试验物料，在外热式回转窑内进行了一系列热解试验。考察了热解终温对热解产物的产率及产物特性的影响。随热解终温的提高，热解气体的产率上升而半焦的产率下降；ＰＥ和ＰＶＣ的热解焦油的产率下降，而废轮胎则相反。在试验温度范围内热解气体的平均热值有一最大值；ＰＶＣ在热解过程中Ｃｌ－ＨＣｌ的转化率为５２０％～５６０％；热解终温对焦油的ＣＨ原子比、热值及族分均有一定影响；热解终温对热解半焦的热值。

An externally heated rotary-kiln pyrolyser was designed and developed at the laboratory-scale PE, PVC plastics and waste tire were selected as test materials, and a series of tests were performed The influences of final pyrolysis temperature (FPT) on products from the pyrolysis of test materials have been studied Raising FPT causes the yield of gas increasing and the yield of semi-coke decreasing The average heat value of the gas and the percentage of heat capacity of gas in raw material change with FPT The atom ratio of C/H and the primary groups of tar were analyzed at various FPT The influences of FPT on the primary and elemental analyses of semi-coke and the CO 2 reactivity of the semi-cokes were also discussed The conversion of Cl-HCl during PVC pyrolysis ranges from 52% to 56%, and increases slowly with increased FPT