Optimal Operation Research Of Limestone-gypsum Wet Flue Gas Desulfurization For Coal-fired Power

The limestone-gypsum wet flue gas desulfurization system(WFGD) is now most widely used by the large coal-fired power plant in china. In this paper, studies on the problems about the WFGD is carried out in the following three aspects.The operation optimization on the process in the desulfurization absorber. Based on the samples selected from the operation data, the forecasting model is built by the LS_SVM and proved to be rational and accurate. The parameters of the model is optimized by the NWA_PSO. The affectation of the single parameter and double parameters on the desulfurization efficiency is analyzed by the model. The operation cast model is built based on the limestone consumption and the power consumption of the circulating slurry pumps. The main operation parameters to the fixed desulfurization efficiency is optimized by the genetic algorithm to make the operation cost least.The optimization of the operation composition and joint adjustment of the draft fan and booster fan. Base on the characteristic curve of the draft fan and booster fan, the characteristic model and power consumption model are built and proved to be rational and accurate. The total power consumption of the fans under several typical loads and the operation composition and static pressure at the inlet of the booster fan is calculated and optimized by the models.The operation composition optimization on the spraying levels in the desulfurization absorber based on the data obtained from tests, the desulphurization relative cost and per unit desulphurization relative cost are defined. Under several typical loads, the desulfurization efficiency and operation economy of the compositions of the spraying levels is studied.