What Are Electrostatic Precipitators?

An electrostatic precipitator (often abbreviated to ESP) can be defined as a filtration device that has the ability to remove fine particles from a flowing gas. Examples of fine particles that can be filtered out of flowing gases with the help of an electrostatic precipitator include smoke and dust. ESPs work by inducing an electrostatic charge on the particulate matter in the flowing gas and using the forces that arise due to these electrostatic charges to filter out the particulate matter from the gas. Since the energy is only applied to the particulate matter in the gas, electrostatic precipitators are believed to be more efficient than wet scrubbers (in terms of energy consumption). The performance of an electrostatic precipitator is dependent on two primary factors – the electrical resistivity and the particle-size distribution. The collection efficiency of the ESP is highly dependent on the resistivity.

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