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How does an electrostatic precipitator work to remove particulate pollutants released from the thermal power plants?

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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

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