Typical Components Of Municipal Solid Waste Combustion And Emission Characteristics

With the rapid development of economy, disposing MSW with incineration in our country develops quickly. But the research of MSW is insufficient and should be carried out in further steps. So this paper mainly researches on the characteristics of incineration and emission of MSW, which establishes a solid foundation for the following researches and also provides experimental data for the design of incinerator.The first part of this paper gets some eigenvalue and kinetic parameters after studying several typical MSW constituents with TGA technology. It also discusses several methods to determine ignition temperature of typical MSW constituents and the interactional effects of mixed MSW constituents. To overcome the disadvantage of discontinuity of combustion kinetic equations during the whole temperature interval, a new method is adopted and with which continuous combustion kinetic equations are built. The result shows that these equations fit well with experimental data.By studying the volatile and the carbon of several typical MSW constituents through fluidized bed, part two mainly analyzes various factors which affect the combustion time of volatile and carbon. And then the combustion time of volatile is calculated by theory, which matches the experimental result well.The effect of increased water on the combustion characteristics and emission characteristics of MSW constituents are studied in the third part of this paper, The result shows that, when water is increased to some degree, the combustion time of volatile and carbon becomes shorter, and the emission concentration of carbon decreases, while at the same time the emission concentration of nitrogen monoxide increases.The emission characteristics of convention gases of typical MSW constituents are discussed in the last part of this paper, and the results are listed as below. When excessive air coefficient is less than 1.5, the emission concentration of carbon monoxide is very high, so when MSW is incinerated, excessive air coefficient should be kept fairly high. The transform ratio of fuel-nitrogen to nitrogen monoxide is no more than 40-60%. The transform ratio and the emission concentration of sulfur dioxide is fairly low. The emission characteristics of mixed constituents are also studied, and the result shows that the emission characteristics of mixed constituents are more complicated than the overlap of that of single constituents.Because MSW is too complicated and too changeful, it is very hard to quantificationally describe the physical properties and other properties, this paper selects the mainly typical MSW constituents and deals with the combustion and the emission of single MSW constituents, then this paper researches on the combustion characteristics and the emission characteristics of mixed MSW constituents, and analyzes the relationship between single constituents and mixed constituents. Compared with conventional methods, this experimental method is initiative in some degree.