What is the working principle of electrostatic precipitator in thermal power plant?

Electrostatic precipitator in power plant uses electricity to collect dust, which is also called electrostatic precipitation. Its working principle is that when the dust particles in the flue gas pass through the high-voltage electrostatic field, they collide with positive and negative ions and electrons between the electrodes and become charged (or become charged in the ion diffusion movement), and the dust particles with electrons and ions move to the counter electrode under the action of electric field force and are adsorbed on the counter electrode, so that the dust on the electrode falls into the dust collector through vibration, and the flue gas passing through the electrostatic precipitator is purified, thus achieving the purpose of protecting the atmosphere and the environment.

Under the action of electric field force, dust with different polarities moves to electrodes with different polarities and is deposited on the electrodes, thus achieving the purpose of separating dust from gas. The ash deposited on the electrode is vibrated, discharged and cleaned out of the body, and then transported to the ash yard or a device convenient for storage through the ash conveying system (pneumatic ash conveying and hydraulic ash conveying). The purified gas is discharged from the chimney and diffused into the atmosphere.