Through investigation on operation status of 48 desulphurization facilities using limestone-gypsum

the actual running states of the desulfurization system

booster fan

flue gas heat exchanger and gypsum dewatering system were obtained.The results show that

the high inlet SO2 concentration is the reason why the desulfurization system desulfurization efficiency is less than the design value.Due to unreasonable type selection of booster fan and over high ash and flue gas volume(higher than the design vale)

most booster fans' efficiencies are too low to meet the design values.Congestion causes over high pressure of the GGH

and corrosion leads to the GGH's over large leakage rate.The water content in gypsum of all desulfurization units is higher than the design value(10%).All the above factors lead to increase in power consumption of the desulfurization system.