ELECTROSTATIC PRECIPITATORS, the basic idea of an ESP, The method of charging, The temperature of operation, The method of particle removal from collection surfaces

 ELECTROSTATIC PRECIPITATORS

• An electrostatic precipitator (ESP), or electrostatic air cleaner is a particulate collection device that removes particles from a flowing gas (such as air) using the force of an induced electrostatic charge.

• the basic idea of an ESP:

Charging

collecting.

removing

• Every particle either has or can be given a charge—positive or negative.

• we impart a negative charge to all the particles in a gas stream in ESP.

• Then a grounded plate having a positive charge is set up.

• The negatively charged particle would migrate to the grounded collection plate and be captured.

• The particles would quickly collect on the plate, creating a dust layer. The dust layer would accumulate until we removed it.

• The structural design and operation of the discharge electrodes (rigid-frame, wires or plate) and collection electrodes.

tubular type ESP

plate type ESP

•The method of charging

single-stage ESP

two-stage ESP

• The temperature of operation

cold-side ESP

hot-side ESP

• The method of particle removal from collection surfaces

wet ESP

Dry ESP

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