Study On Gasification And Combustion Characteristics And Rate Model Of MSW

With the development of economy and urbanization, there are more municipal solid wastes(MSW) around us. And the environment we live in is under great threat. Treatment by burning municipal solid waste has been widely promoted and applied, because of it's characteristics of volume reduction, weight reduction and reclamation. Related experiments have been taken in thermal analyzer and experimental furnace, and MSW's weightlessness characteristics and kinetics have been studied. On that basis, MSW's rate models are established.â‘ Thermogravimetric analysis has been taken to study typical components and their mixtures of MSW's pyrolysis and combustion characteristics. The results show that MSW go through two stages-loss of water and escape of volatile substance in the process of pyrolysis, while three stages-loss of water, escape of volatile substance and burn of combustible in the process of combustion. Pyrolysis and combustion kinetics has been studied. We build kinetics model of MSW's pyrolysis and combustion reaction. and then obtain kinetics parameters activation energy(E) and frequency factor(A) through calculation.â‘¡Gasification and combustion experiments of typical components and their mixtures of MSW are taken, and the results show that, Each component has a obvious weight loss process. We obtain the best reasonable mechanism model of each component's gasification and combustion reaction through calculation. And we obtain kinetics parameters E and A as well.â‘¢Each component's rate model has been established, and it is . The rate model reflects the relationship of typical components and their mixtures of MSW's reaction rate. We can calculate the mixtures'reaction rate with this model.â‘£The results show that MSW's gasification and combustion reaction rate will be improved with the rise of oxygen percent and furnace temperature.