Abstract:

Along with gradually shortage of domestic coal supply, the quality of actuallyfired coal is greatly deviated from designed coal quality in many

power plants; and this causes the mass concentration of SO2 in inlet of FGD system to increase in large amplitude. So ，the existing FGD equipment must be

reformed to increase its capacity. Combining with the capacity expansion reformation project of FGD system of a power plant in Guizhou, the capacity

expansion reformation scheme was expounded in detail. The design experience was summarized, which provides reference for FGD capacity expansion reformation

projects in future.

Key words: wet FGD, flue gas, capacity expansion reformation, optimized design