Question

Which of the following is true regarding fabric filter control?
____ (a) The maximum pressure drop in a shaker-type baghouse occurs just prior to the time when a compartment is taken off-line for cleaning
____ (b) The cleaning process returns bags to the original clean state (when brand new)
____ (c) Optimal air-to-cloth ratios depend only on the type of particles to be collected
____ (d) Highly flammable dusts may preclude the use of a baghouse
____ (e) A clean-side fan (on the outlet side) is required for all types of baghouses

Answer 1

(d) Highly flammable dusts may preclude the use of a baghouse

Explanation

Minimum operating temperature is especially important where acid gases are expected to be present in the gas stream. Lower temperatures mean acid gases have the potential to condense and corrode the fabric filter casing and other metal parts. Condensation can also cause bag blinding, which blocks air flow through the bag. Fabric filters are also susceptible to damage caused by high temperatures.