Which of the following methods can be used to control air pollution from a thermal power plant 1 Scr...........

Environment and Ecology Air Pollution

Which of the following methods can be used to control air pollution from a thermal power plant?

1. Scrubber

2. Electrostatic precipitator

3. Particulate filter

Select the correct answer using the code given below.

1 only

1 and 2 only

2 and 3 only

1, 2 and 3

All of the given methods are used to control air pollution from a thermal power plant.

Electrostatic precipitator: It is a device that helps in pollution control by removing many chemicals. These chemicals are lime salts, activated charcoal. It also removes particles called 'Fly ash' because they are light and tend to fly around in hot flue gases.
Particulate filter: It separate the particulate matter from the gases in electric power plants. The smoke passes through a series of cloth bags which trap the particulate matter.
Gravitational settling chamber: This device consists of huge rectangular chambers. The gas stream polluted with particulates is allowed to enter from one end. The horizontal velocity of the gas stream is kept low in order to give sufficient time for the particles to settle by gravity.
Scrubber: It is a device that employs spray of water to catch pollutants during emissions. A dry scrubber is used to remove acid gases.