Desulfurization wastewater from coal-fired power plants mainly contains high concentrations of chloride ions, sulfate ions, and calcium and magnesium ions, with a low pH value, which is highly corrosive to equipment and pipelines, and is also prone to scaling and clogging. Most of the coal-fired power plant desulfurization treatment using limestone - gypsum method, which produces desulfurization wastewater also contains a large number of suspended solids, aggravating the difficulty of treatment.

 By electrolyzing to treat desulfurization wastewater, the prepared sodium hypochlorite will be used as a biocide for circulating cooling water, which will improve resource utilization and thus save costs.