Describe electrostatic precipitator by a diagram.
Electrostatic precipitators are extremely efficient devices which remove about 99% of particulate matter present in the industrial and thermal power exhausts. They have charged plates which are connected to the ground. The electrode wires are provided with high voltage electric current which produce a corona that releases electrons. These electrons attach to the dust particles giving them a negative charge. The collecting particles are grounded and attract the charged dust particles. The velocity of air between the plates must be low enough to allow the dust to fall.
