Wet electrostatic precipitators are usually installed after wet desulfurization devices. After desulfurization, a large number of water droplets are carried in the saturated flue gas and captured when passing through a high-voltage electric field, which can reduce the probability of gypsum rain formation. At the same time, it has a good effect on collecting fine particulate matter such as PM2.5 and acid mist, and the smoke emission concentration can reach ≤ 10 milligrams/cubic meter. Meanwhile, the price, operation and maintenance costs, service life, and ease of operation management of dust collectors are also important factors to consider their performance.