We will consider the maintenance and repair of wet electrostatic precipitator equipment, and select a suitable wet electrostatic precipitator. In addition, the technology and operating cost of wet electrostatic precipitator equipment shall be evaluated as a whole to ensure the rationality of its application. In short, the wet electric precipitator, as a coal-fired power plant flue gas purification equipment, is of great significance for controlling the emission of harmful substances. Wet electric precipitator improves the application efficiency of wet electric precipitator by building a coal-fired power plant; in this process, it is necessary to comprehensively consider dust, SO2, NO, SO3 and other substances, combined with the actual situation of coal-fired power plant, to formulate environmental protection technology routes, Meet the application conditions of wet electrostatic precipitator. The rapid development of wet ESP economy and technology has promoted the rapid development of wet ESP in the field of coal-fired power plants in China. In order to ensure that the wet ESP can meet the application conditions of flue gas treatment systems, it is proposed that: Power plants use low-temperature electrical precipitators, medium- and high-sulfur coal-fired power plants use wet-type electrostatic precipitators, and suggestions to select the appropriate type of dedusting based on the overall situation of the power plant to ensure that wet-type electrostatic precipitators are used in coal-fired power plant production. Adapting coal to the system provides a strong guarantee for adapting to the road. Wet electrostatic precipitator For medium- and high-sulfur coal power plants, it is strongly recommended to use wet electrostatic precipitator. It is because the wet type electrostatic precipitator can not only control the emission of smoke and dust, but also have a positive effect on the long-term environmental protection benefits. Through long-term practice, it is recommended that the following two conditions should be met when applying a wet electrostatic precipitator. One is to meet the control requirements of soot emissions, and the other is to consider removing most of PM25 and Hg to avoid blue plumes.