ICSE Class 9 Answered
Explain the working of the following with the help of a diagram:
Electrostatic Precipitator
Cyclone Separator
Asked by Topperlearning User | 14 May, 2015, 12:53: PM
Expert Answer
- Electrostatic Precipitator: This device is used for removing fly ash after combustion of coal or other materials. The process of its working is as follows:
- After combustion of coal and other materials, polluted gas or smoke enters the electrostatic precipitator.
- The devise is electronically charged. The polluted air and the impurities become negatively charged as they gain electrons on their surface.
- Negatively charged dust particles are then drawn towards the positive charged electrodes plates and are deposited there.
- Impurities are then dislodged by mechanical rappers and get collected at the bottom of the unit in a hopper.
- An electrostatic precipitator is a very efficient device which removes more than 99% of impurities.
- Cyclone Separator: It is a devise which is used for removing impurities and particulate matter. It works in the following way:
- Dust laden air is made to enter into the metallic cylinder at a high speed. It has a conical shape.
- As the speed of the air is high, a vortex or a whirlwind mass of air is created.
- As a result the particulate matter falls to the bottom and the gas moves upwards.
- The particulate matter then slides down the walls of the cylinders and gets discharged from the outlet.
Answered by | 14 May, 2015, 02:53: PM
