Wet Electro-Static Precipitator uses electrostatic forces to remove particulate. The use of electrostatic forces minimizes energy costs compared to Venturi scrubbers or baghouses, Wet electrostatic precipitators are used in a wide range of applications including, hazardous and medical waste incinerators, metals refining, sulfite pulp mill recovery boilers, sulfuric acid plants, and wood dryers.
Particle collection occurs in a collector section which consists of an array of grounded tubes and high voltage discharge electrodes. A high voltage is applied to the discharge electrodes to both charge the particles and provide a high voltage field.
The voltage on the discharge electrodes creates a corona discharge of electrons from high intensity ionization disks on the electrodes. This disk-in-tube geometry allows for the formation of a stable, intense, electrostatic field for particle charging. As the electrons move from the discharge disk to the collector tube, some of them intercept particles in the gas stream which charges the particles.
Once the particles are charged they move across the gas stream by the high voltage field where they deposit on the grounded collector tube. The particles are then intermittently flushed from the collector tube with a stream of water.
