城市生活垃圾典型有机组分混合热解特性的研究

Study on the pyrolysis characteristics of the mixture of typical organic components of MSW

利用自行设计的较大物量(约10g)的热重分析装置对城市生活垃圾典型有机组分(纸屑、木屑、织物、塑料、橡胶、厨余)的混合热解特性进行了实验研究,并用最小二乘法计算得到由若干平行反应组成的热解反应动力学模型,实验结果与模型计算结果吻合较好。在此基础上对城市生活垃圾典型有机组分混合热解中的交互影响和非线性规律进行了分析。结果表明,城市生活垃圾典型有机组分混合热解动力学模型由2个～4个平行反应组成;混合热解中有反应发生合并的现象;热效应和组分比例对混合物综合热解特性有显著影响。

A thermogravimetric system was designed, in which a large amount of sample (about 10g) can be examined. The pyrolysis characteristics of the mixture of typical organic components (paper, wood, fibre, plastic, rubber and food residue) of MSW (municipal solid waste) were studied. The pyrolysis kinetics model, which consists of several parallel reactions, was obtained using the least square algorithms. The results calculated by the model have good agreement with the experimental ones. Based on these results, the interactions and nonlinear phenomena in pyrolysis of the mixture were analyzed. The results show that the pyrolysis kinetics model of the mixture of typical organic components of MSW consists of 2～4 parallel reactions. Sometimes parallel reactions merge during pyrolysis. Heat effect and the mixing proportion have remarkable effect on the overall pyrolysis characteristics of the mixture.