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以塑料(PVC)和木屑为原料模拟可燃固体废弃物中主要成分,采用Freeman-Carroll法根据优化的数学函数和动力学参数建立动力学模型,研究在全氧条件下生物质和塑料(塑料质量比15%,25%和50%)共燃烧的特性及动力学,对比了木屑和塑料单独燃烧的情况,结果表明,随试样中塑料比例增加,TG-DTG曲线逐渐向低温区移动,挥发分失重峰温逐渐降低,固定碳失重峰逐渐增加.起始温度和最大燃烧速率对应的温度逐渐降低,终止温度增大.随塑料含量增加,计算的平均活化能逐渐增加,分别为52.46,63.05和70.91k J/mol,表明燃烧的难度逐渐增大,对外加能量的需求量也越大.燃烧特性指数逐渐减小,即加入塑料能降低木屑的燃烧温度.可燃固体废弃物中生物质含量多时易燃烧,塑料多时不易燃烧.
The main components of combustible solid wastes were simulated by using plastic (PVC) and sawdust. The kinetic model was established by Freeman-Carroll method according to the optimized mathematical function and kinetic parameters to study the effect of biomass and plastic The results showed that the TG-DTG curve gradually moved to the low temperature region with the increase of the proportion of plastic in the sample, and the volatile The weight loss peak temperature gradually decreased, the fixed carbon weight loss peak gradually increased.The initial temperature and the maximum combustion rate corresponding to the temperature gradually decreased, the termination temperature increases.With the plastic content increases, the calculated average activation energy gradually increased, respectively, 52.46,63.05 And 70.91k J / mol, respectively, indicating that the difficulty of combustion is gradually increasing, the demand for added energy is also larger, and the combustion characteristic index is gradually reduced, that is, the addition of plastic can reduce the burning temperature of sawdust. The biomass content of combustible solid waste Occasionally flammable, long-lasting plastic is not easy to burn.