Page 112 - Dust Explosions in the Process Industries
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Dust Explosions: An Overview 85
PRESSURE IN VESSEL
f
TIME
Figure 1.94 The basic principle of dust explosion venting: Provision of an opening controlled dis-
charge of unburned, burning, and burned dust cloud keeps the maximum pressure inside the vessel
below a predetermined limit, Pred.
k
Figure 1.95 Reinforced vented 6 m3 bag filter
enclosure: Pred = 0.4 bar(@, pressure-shock-resist-
ant construction. The vent cover is a 0.85 m2 three-
layer bursting panel (Courtesy of lnfastaub Brilon,
Rembe, Germany).
1.4.6.2
Vent Area Sizing
Through the systematic work by Bartknecht (1978) and others, it has become generally
accepted that the required area of the vent opening depends on the
