Page 24 - dust collection systems

pressure gently collapses the bags partially toward their
centrelines, which causes the dust cake to crack and detach

from the fabric surface causing the dust cake to fall into the

hopper below.

Because felted fabrics retain dust more than woven fabrics

and thus, are more difficult to clean, felts are usually not

used in reverse air baghouses.

. The flow of the dirty gas helps maintain the shape of the

bags. However, to prevent total collapse and fabric wear due

to rubbing during the cleaning cycle, rigid rings are sewn into

the bags at intervals.

The correct number of rings depends on the bag diameter

and length. Following table may be used as a general guide.

Bag Dia bag no of

in " length in rings

"
5-6" < 120 1 or 2

120 - 3

130

130 -168 4
> 168 5

8 < 260 4

> 260 5

11.5-12 260-300 5