Fabric Filter Design Review

The design of an industrial baghouse involves consideration of many factors including space
restriction, cleaning method, fabric construction, fiber, air-to-cloth ratio; and many construction
details such as inlet location, hopper design, and dust discharge devices. Air pollution
control agency personnel who review baghouse design plans should consider these factors
during the review process.
A given process might often dictate a specified type of baghouse for particulate emission control.
The manufacturer’s previous experience with a particular industry is sometimes the key
factor. For example, a pulse-jet baghouse with its higher filter rates would take up less space
and would be easier to maintain than a shaker or reverse-air baghouse. But if the baghouse was
to be used in a high temperature application (500°F or 260°C), a reverse-air cleaning baghouse
with woven fiberglass bags might be chosen. This would prevent the need of exhaust gas cooling
for the use of Nomex felt bags (on the pulse-jet unit), which are more expensive than fiberglass
bags. All design factors must be weighed carefully in choosing the most appropriate
baghouse design.