Page 565 - Dust Explosions in the Process Industries
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532 Dust Explosions in the Process Industries
Figure 7.58 Rebound nozzle for dispersing the dust
in the 20 liter Siwek sphere (Courtesy of R. Siwek,
Cuba-Geigy AG, Switzerland).
to Siwek (1988), the new nozzle produces both maximum pressures and Ks, values in
reasonable agreement with those generated by the original perforated-ring system.
7.14.2.4
Other 20 Liter Vessels
The U.S. Bureau of Mines vessel, described by Cashdollar and Hertzberg (1985) and
shown in Figure 7.59, is a valid alternative to the Siwek vessel. An advantage, as demon-
strated in Figure 7.44, is the large opening, giving easy access to the inside of the vessel
for cleaning, inspection, and the like.
Figure 7.59 Photo of the 20 liter U.S. Bureau of Mines vessel with the lid on (Courtesy of C. L.
Cashdollar, US. Bureau of Mines, Pittsburgh, PA).
It would be expected that the U.S. Bureau of Mines vessel would yield both maxi-
mum explosion pressures and rates of pressure rise in agreement with data from the
