Abstract: The importance of desulphurization wastewater treatment was expounded, and the traditional method of wastewater treatment and its problems were introduced. Aiming at the situation of the desulphurization wastewater treatment of the Huadian International Zouxian Power Plant, a desulphurization wastewater discharge scheme was put forward, in which the special wastewater treatment system will be changed to the wastewater discharging mixed with slurry. After the reformation, the pollutant content in the wastewater is reduced, the scaling and blockage of the slurry pipe have been alleviated, and the purposes of energy conservation and environment protection were realized. 

Key words: wet desulphurization, limestone-gypsum, wastewater treatment, emission, energy conservation