TM 5-815-1/AFR 19-6
would be used to keep the gas temperatures
enables a virtually continuous filtering flow.
in the baghouse above the acid dew point
Filter elements can be pulsed individually, or
during the cleaning cycle.
in rows. With a multicompartment baghouse,
(5) Pulse-jet. A pulse jet system is illustrated in
a whole section may be pulsed at one time
figure 9-6. A short blast of air at 29 to 100 lb/
through a single venturi. The pulse produces
in2 is directed into the top of the filter. This
less fabric motion than in shaking and also
blast is usually sent through a venturi which
allows tighter bag spacing. A pulse-jet clean-
increases the shock effect. As the pulse starts
ing system requires no moving parts for
down the filter tube, more air is drawn in
cleaning and is designed to handle high gas
through the top. This combination causes the
flows per square foot of cloth area (air to
flow within the bag to temporarily reverse,
cloth ratio). However; this system requires a
bulges the fabric, and releases the dust cake
compressed air system with a timer
from the outside of the filter tube. The whole
mechanism and control air solenoid valve for
process occurs in a fraction of a second which
automatic cyclic cleaning. Pulse-jet
9-3
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