Wet electrostatic precipitators for thermal power units have strong adaptability to dust and can achieve high dust removal efficiency. They are also suitable for processing high-temperature and high humidity flue gas; No secondary dust; No vulnerable components such as hammering equipment, high reliability; It can remove submicron particles, SO3 aerosols, and gypsum micro droplets, and has a good effect on controlling PM2.5, blue smoke, and gypsum rain; Due to the high airflow velocity of the electric field in the electrostatic precipitator, the inclination angle of the ash hopper is reduced, and the equipment layout is compact; The problem of reducing the total carried water in the flue gas and decreasing the probability of gypsum rain formation is that the exhaust temperature needs to be lower than the adiabatic saturation temperature of the flushing liquid; It is difficult to use wet electrostatic precipitators at high dust and SO2 concentrations; There should be good measures in place;

Although the flushing water for wet electrostatic precipitators in thermal power units adopts a closed cycle, it needs to be balanced with the desulfurization water system; Multiple components require corrosion-resistant materials and have not been mass-produced, resulting in high investment costs for individual products; The new unit needs to occupy a separate site behind the furnace, and there will be site layout issues for the renovation of the old unit.

The operation experience of wet electrostatic precipitators in thermal power units shows that the application of wet electrostatic precipitators in coal-fired power plants is feasible and has good control effects on composite pollutants, which can solve many environmental problems. The application of wet electrostatic precipitators in thermal power units should be coordinated with the main flue gas treatment technology route, and experience should be summarized in a timely manner. According to different conditions of coal-fired power plants, it is necessary to adapt to local conditions, coal, furnace, and standards, and consider possible changes in future environmental standards to ensure the reliable application and reasonable development of wet electrostatic precipitators in China.

Wet electrostatic precipitator for thermal power units in Guangxi and Lanzhou