At present, wet electrostatic precipitator is mainly used in large-scale coal-fired power plant, iron and steel sintering desulphurization flue gas, acid making, chemical industry, metallurgy and other industries in our country, wet electrostatic precipitator (ESP) has been used in power plants for nearly 30 years abroad, and has been developing rapidly in China since GB13223-2011 The wet electrostatic precipitator uses liquid to wash the surface of the dust collecting pole to carry out dust cleaning, effective Collection of fine particulate matter (PM2.5 dust, SO3 acid fog, aerosol) , heavy metals (Hg, As, Se, Pb, Cr) , organic pollutants (Polycyclic aromatic hydrocarbon, dioxins) , etc. , and effectively remove gypsum rain, ammonium sulfate rain.