Question

a variety of air pollution control devices remove pollutants from industrial exhaust streams.
the table below compares dry and wet electrostatic precipitators (esp) and scrubbers.
process requirements dry esp wet esp scrubbers
can handle moist gas no yes yes
particles collected in liquids no yes yes
collects particles under one micron yes yes yes
highly efficient for submicron particles and low energy consumption yes yes no
recommended for flammable chemicals no yes yes
table adapted from: crcleanair.com
which of the devices in the table would be the most effective at collecting submicron particles in flammable chemicals?
choose 1 answer:
dry esps
scrubbers
wet esps

Explanation:

Step1: Identify requirements

We need a device effective for sub - micron particles and for flammable chemicals.

Step2: Check dry ESP

Dry ESP is highly efficient for submicron particles but not recommended for flammable chemicals.

Step3: Check scrubbers

Scrubbers are recommended for flammable chemicals but not highly efficient for submicron particles.

Step4: Check wet ESP

Wet ESP is highly efficient for submicron particles and recommended for flammable chemicals.

Answer:

C. wet ESPs