Abstract: According to seven key design elements of the main factory building floor area, concrete reinforcement amount, pile foundation optimization, leachate spraying, main steam parameter selection, on-line soot blowing combined mode and station service power consumption rate of municipal solid waste incineration power plant, the optimization design ideas for the construction of new waste to energy plant were proposed from the angle of cost reduction and efficiency increase. Through the comparison and analysis of technical and economic indexes of several typical projects, seven recommended application modes or typical control values were formed on the optimization design of waste to energy plants with the scale of 500 t/d×1 and 500 t/d×2. Among which, main factory building floor area should be controlled at 12 000~19 000 m2, concrete reinforcement amount of main factory building should be controlled at 160~195 kg/m3, more than 25% of the pile foundation investment could be saved by selecting reasonable pile types and optimizing pile testing. Leachate spraying was applied to an incineration line, which could reduce leachate treatment system scale by 30 t/d，medium temperature and sub-high pressure parameters of 450 ℃ and 6.4 MPa should be applied to main steam. On-line soot blowing combined mode of “water spray soot blowing+steam soot blowing+shockwave soot blowing” should be applied to waste heat boiler, and the station service power consumption rate should be controlled at 14%~18%.

Key words: municipal solid waste, incineration plant, optimization design, cost reduction, efficiency increase