i) Electrostatic precipitator is a device which is used to extract the suspended dust particles from the gas.
It uses high voltage charge to collect particles on the charged plates.
ii) It has electrode wires which are maintained at high voltages. This produces corona which releases electron.
iii) These electrons get attached to the dust particles, giving them a net negative charge.
iv) The collecting plates collect the negatively charged dust particles.
v) The velocity of air between plates is kept low to allow the dust particles to fall and settle down.
vi) Electrostatic precipitator can remove over 99% particulate matter present in the exhaust from a thermal power plant.
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