Corrosion and Anticorrosion of Wet Limestone-gypsum Flue Gas Desulfurization System

As the limestone scrubbing process is widely used in flue gas desulfurization(FGD) system of heat-engine plants,serous corrosion issues are put forward to the public.This paper describes the main four mechanisms in FGD,discusses the dominating corrosion types,and analyzes the corrosion situation without gas-to-gas heat exchanger(GGH).The anticorrosion technology is generalized.