In coal fired thermal power stations, electrostatic precipitators used for

Electrical Engineering XYZ MCQs

In coal fired thermal power stations, electrostatic precipitators used for:

1. Keeping air heaters clean
2. Collecting the dust particles from the flue gases
3. Removing dust particles setting on the bus bar conductors in the station switch yard
4. All of the above

Correct answer: 2. Collecting the dust particles from the flue gases

Explanation: Electrostatic precipitators (ESPs) are commonly used in coal-fired thermal power stations to remove dust particles from the flue gases emitted during the combustion process. Flue gases contain various pollutants and particulate matter, including ash and soot, which can be harmful to the environment and human health if released unchecked.

Here’s how an electrostatic precipitator works:

1. Flue gases containing dust particles are passed between a series of plates or tubes charged with a high voltage electrical field.
2. The dust particles become charged as they pass through the electric field.
3. The charged particles are then attracted to oppositely charged plates or tubes, where they collect and adhere.
4. Cleaned flue gases exit the precipitator, while the collected dust is periodically removed for disposal.