Air pollution from industries is controlled by which type of equipment for particulates?
Choose the correct answer
Chimneys increase dispersion (not removal) — actual control by ESP, cyclone, fabric filter, wet scrubber
Only chimneys and tall stacks
Chemical neutralisation only
Water washing of flue gas only
Correct Answer
A. Chimneys increase dispersion (not removal) — actual control by ESP, cyclone, fabric filter, wet scrubber
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Particulate control: Cyclone (inertial, 5–50 μm); Electrostatic Precipitator (ESP, 0.01–10 μm, > 99% efficiency, used for power plants, cement); Fabric filter (baghouse, 0.1–100 μm, high efficiency); Wet scrubber (venturi, 1–100 μm, also removes soluble gases). ESP is most efficient for very fine particles at high temperature.
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