Connected to a constant current source DC power supply, the formation of a non-uniform high-voltage electrostatic field between the two poles, under the action of the electric field, the corona line around the corona layer, the corona layer of the air avalanche ionisation occurs, thus generating a large number of negative ions and a small number of cations, the process is called corona discharge.
Smoke into the electric field charge area, acid particles charged. After charging the acid mist particles electrostatic cohesion to strengthen the role of particle size coarsening, the amount of charge increases, under the action of the electric field force quickly arrived at the anode (precipitation pole). A large number of acid mist particles are constantly driven to the anode, while rapidly releasing the charge.
It is particularly effective in removing fine dust and sulphuric acid mist.
The main forms are tube, honeycomb and casing. Materials are PVC, FRP, lead or 316L alloy materials.