Which one of the following is a most efficient device to eliminate particulate matters from the industrial emissions?
The electrostatic precipitator can remove over 99 percent particulate matter present in the exhaust from a thermal power plant. The electrostatic precipitator has electrode wires which are maintained at several thousand of volts. The electrode wires produce a corona that releases electrons. These electrons get attached to the dust particles by giving them a net negative charge. The collecting plates are grounded to attract the charged dust-particles. The velocity of air between the plates is kept low enough to allow the dust particles to fall. However, the particulate matter that are very small are not removed by these precipitators.
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