Page 70 - Dust Explosions in the Process Industries
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Dust Explosions:An Overview 43
IZOO
1000
900
a90
Ficure 1.45 The influence of oxveen content
400 1 in-gas on the minimum ignition temperature of
-
,v
0 2o 60 <74 pm Pittsburgh coal dust in the Godbert-
OXYGEN CONTENT IN GAS [voi. %I Greenwald furnace (From Hartmann, 7 948).
0 10 20 30 40 50 60
Figure 1.46 The influence of oxygen content in atmosphere on minimum electric spark ignition
energy of dust clouds of various materials. Initial pressure 0.2 bar (abs):mean particle diameter
40 pm, equivalence ratio 0.65 (;.e., excess oxygen for combustion), MIE defined for 80% probability
of ignition (From Ballal, 1980).
