Question

The device which can remove particulate matter present in the exhaust from a thermal power plant is:

• A. STP
• B. Incinerator
• C. Electrostatic Precipitator
• D. Catalytic Convertor

Answer 1

The Correct Option is C

In a thermal power plant, managing air pollution is critical to minimizing environmental impact. Devices that effectively control particulate matter in emissions are essential. The correct choice for this task is an Electrostatic Precipitator (ESP). An ESP operates using the principles of electrostatic charge to capture and remove particles such as dust and smoke from the exhaust stream.

Here’s how it works:

1. The exhaust gas containing particulate matter is passed through a chamber containing high-voltage electrodes.
2. As the gas flows through, the particles in it become charged due to the electric field.
3. These charged particles are then attracted to and adhere to large plates or surfaces within the chamber that have an opposite charge (typically grounded). This process effectively removes them from the gas stream.
4. Once collected, these particles can be dislodged from the plates and properly disposed of, ensuring cleaner gas is expelled into the atmosphere.

This technology is highly efficient at removing fine particulates, making electrostatic precipitators a preferred choice in thermal power plants for pollution control.