Analysis on the Reason of Excessive Moisture Content in Wet FGD System in a Power Plant

Abstract

In a thermal power plant flue gas wet desulphurization system appeared the problem of high-moisture content of gypsum. The paper combines the desulfurization system operating statement and laboratory analysing results. Meanwhile, it analyses the factors composed high-moisture content. The conclusion shows that there are several main factors influence the gypsum dehydration effect, namely content of dust concentration about the system entrance disposal situation of desulphurization wastewater and the quantity of air oxidation. The paper also shows that the gypsum cyclone running condition directly influences the effect of gypsum slurry dehydration. The paper suggests that,in order to ensure the safe operation of desulphurization system, the correspondent treatment measures and suggestions were put forward.