Electrostatic precipitator (ESP)
• ESP has electrode wires and a stage of collecting plates.
• Electrode wires are provided with an electric current of several thousand volts, which produces a corona that releases electrons.
• These electrons attach to dust particles and give them a negative charge within a very small fraction of a second.
• Collecting plates are earthed so that they attract charged dust particles.
• The velocity of air passing through plates is slow enough to allow the dust particles to fall.
Electrostatic precipitator