Abstract: The feasibility of using the carbide slag as desulphurizing agent, instead of the limestone powder, in limestonegypsum wet FGD system of thermal power plant was analyzed. The necessity of the original desulphurization system reformation was expounded. The measures for ensuring safe, economical and stable operation of the equipment system were put forward, which can be used as reference for the limestonegypsum wet desulphurization system when it will be reformed to use the carbide slag as desulphurizing agent in this system.

Key words: carbide slag, wet desulphurization, desulphurizing agent, equipment reformation