The working principle of electrostatic precipitator

The basic principle of electrostatic precipitator is to use electricity to capture dust in flue gas, which mainly includes the following four interrelated physical processes:

(1) Ionization of gas.

(2) Charge of dust.

(3) The charged dust moves to the electrode.

(4) Capture of charged dust.

The collection process of charged dust: on two metal anodes and cathodes with large curvature radii, a high-voltage direct current is used to maintain an electric field sufficient to ionize the gas. The electrons generated after the gas is ionized: anions and cations. The dust is charged by the electric field on the dust. Under the action of the electric field force, the dusts with different charged polarities move to the electrodes of different polarities respectively and deposit on the electrodes to achieve the purpose of separation of dust and gas.