Thermal system simulation and economic analysis of MSW drying system by steam

抄録

Municipal solid waste (MSW) incineration power generation technology has been widely used in China and abroad, and the technology has become increasingly mature. However, the high water content of MSW reduces the efficiency of MSW incineration power plants. At present, there is a major problem of reducing the water content of MSW. Steam is used as a heat source to reduce the water content of MSW before incineration. In this paper, Ebsilon software was used to simulate and transform a MSW incineration power plants, and a steam drying MSW system was constructed. The MSW was dried before entering the furnace by steam. Two improved systems based on the original system are proposed from the steam extraction point, and the pure condensation condition and heating condition were simulated and analyzed. Through the analysis, the best system of steam drying MSW system under two working conditions is the system with the steam of the deaerator as the heat source. Under the pure condensing condition, the overall efficiency in plant is 18.0 % higher than that of the original system, and under the heating condition, the overall efficiency in plant is 16.5 % higher than that of the original system.