Influence of Limestone Flour for wet flue gas desulfurization performance: It can be seen from the wet desulfurization process is mainly reactive, sales of lime powder, to absorb and neutralize flue gas SO2, lime powder, the key is the formation of Ca2 +, which and limestone or limestone powder ingredients (mainly CaCO3 content), fineness, reactivity, etc. are closely related. Quality limestone has a direct impact on the performance of wet flue gas desulfurization. Effect of limestone particle size (fineness) of the FGD system performance: Currently desulfurization absorber with PSD multi fineness, ie with a mesh size of sieved limestone powder, lime powder sales, with the quality to represent the percentage undersize fineness limestone powder. PSD limestone is an important design and operational parameters, limestone powder limestone powder PSD determines the specific surface area, affecting the utilization rate of the reaction pH and limestone towers, these variables can affect the removal efficiency greater extent.