Question

The principle involved in collection and sampling of particulate matter in which
the particles are drawn through a device by deflecting them from the original paths is called
1. Filtration
2. Electrostatic precipitation
3. Impaction
4. Gravitational settling​

Answer 1

Answer:

Your answer is no.2

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Answer 2

Answer:

option (2)Electrostatic precipitation

Explanation:

1. Filtration or Fabric Filters: In this system, flue gas passes through a woven or fabric filter, which removes particulate matter while allowing gas to pass through. Interception keeps such particles on the fabric.

3. Aerosol impaction is the process of removing particles from an air stream by pushing gases in the air to bend sharply. Particles larger than a specific size have too much momentum to follow the air stream and hit a collection surface.

4. Stokes' Law is used to explain gravitational settling. When the emitted smoke passes through a settling chamber, big particles in the chamber settle down due to gravitational forces, allowing them to be readily removed.

2. Electrostatic Precipitation (ESP): In an ESP, flue gas travels through a highly ionised zone, where uncharged particles become electrically charged and are diverted off their original route by electrostatic forces in a powerful electric field, and thus separated from the flue gas.

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