What is the purpose of electrostatic precipitators in power plants?

Electrostatic precipitators are devices used to remove particulate matter, such as fly ash, from the flue gases emitted by combustion processes in power plants. The primary function of these systems is to capture fine particles and smoke before they are released into the atmosphere, thereby reducing air pollution and adhering to environmental regulations.

The operation of an electrostatic precipitator involves charging particles as they pass through an electric field, which then causes the particles to be attracted to collection plates of the opposite charge. This process ensures that a large amount of fly ash, which can be harmful to both health and the environment if released unfiltered, is effectively removed from the exhaust gases.

The other options do not accurately reflect the function of electrostatic precipitators, as they do not enhance combustion, reduce noise, or regulate steam pressure. Rather, their sole focus is on the effective removal of particulate matter from exhaust streams.