Study On The Utilization Technology Of Desulfurization Wastewater In Power Plant

Base on the omposition of the high magnesium wet-calcium-desulphurization wastewater from domestic thermal power plants and the analysis of related phase diagrams,a continuous evaporation experiment on a company's wastewater was carried out.The process flow of separation and purification and the law of evaporating crystallization of salt were obtained in a series of experiments.It was found that the crystallized path of the desulphurization wastewater was that:calcium sulfate,magnesium sulfate monohydrate and a mixture of magnesium sulfate monohydrate and sodium chloride.It provides the reliable process parameters for the resource utilization of the high magnesium desulphurization wastewater and the zero discharge treatment of wastewater.Base on the omposition of the low magnesium wet-calcium-desulphurization wastewater from domestic thermal power plants and the analysis of related phase diagrams,The experiment of concentrated freeze evaporation experiment and membrane treatment and evaporation combined treatment of a company wastewater was carried out with laboratory equipment.The experimental results show that the desulphurization wastewater can be reused through these two methods,and recovery of sodium chloride and sodium sulfate.It provides the reliable process parameters for the resource utilization of the low magnesium desulphurization wastewater and the zero discharge treatment of wastewater.