Flue Gas Treatment of Desulphurization Wastewater

Abstract

Desulfurization wastewater from thermal power plants has high salinity, strong corrosiveness and great harm to the environment, which is the key and difficult point to realize zero discharge of wastewater. The conventional evaporative crystallization process is complicated with many equipments and high investment cost and operation cost. Based on the problems of the traditional evaporation crystallization process, the field of zero discharge of desulphurization wastewater is more inclined to flue gas treatment. In this paper, the flue gas evaporation technology is introduced and analyzed, and various processes and combinations are analyzed and compared, as well as the cost comparison. Finally, it is confirmed that spray drying evaporation technology has the most market potential.