Experimental Study On The Pyrolysis Characteristics Of MSW And Its Prediction Model

Municipal solid waste (MSW) has become a global environmental problem. Because of the advantages of weight reduction and energy recovery, the thermal treatment technology has been widely adopted in the developed countries. With the development of economy and society, the thermal treatment technology has gradually been the dominant one for MSW treatment in China. The characteristics of MSW are significant for the design and operation of the thermal treatment facilities of MSW. However, the MSW is a kind of compounded-component fuel, so there are great differences between the pyrolysis characteristics of different components in MSW. Different components interact with each other in the process of MSW pyrolysis, so the general pyrolysis characteristics of MSW is absolutely not the weighted sum of those of its components, and it is impossible to describe the pyrolysis characteristics of MSW by accurate mathematical models. In order to find out the interactions between different components during MSW pyrolysis and to put forward a characterization technique for the general pyrolysis characteristics of MSW, six representative organic MSW components (paper, wood, food residue, fabric, plastic and rubber) were selected, whose single-component and multi-component pyrolysis characteristics were studied from three different angles.Firstly, an experimental apparatus for thermogravimetry analysis was designed, in which lager quantity of sample can be analyzed. By using this apparatus, the studies on the single-component and multi-component pyrolysis characteristics of MSW were performed in a program-controlled heating pyrolysis mode. Meanwhile, the nonlinear phenomena, such as the similar features, interactions between different components, were analyzed. The pyrolysis reaction kinetics parameters of each sample were calculated by using the pyrolysis reaction kinetics model composed of several independent parallel reactions.Secondly, a multi-functional experimental apparatus was designed, by which the fast pyrolysis experiment can be conducted. The studies on the fast pyrolysis characteristics of each representative organic MSW component were performed in this apparatus, and the characteristic parameters of fast pyrolysis...