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114 Dust Explosions in the Process Industries
Figure 1.1 31 A central stationary vacuum clean-
ing system with a number of alternative plug-in
points for vacuum cleaning hoses.
liquid may soften the grain surface and reduce dust formation by rubbing and abrasion
during handling and transport. Adding liquids for controlling dust formation and dust-
ing has been used primarily in the grain and feedstuffs industries. However, it is not
unlikely that the method may also find other applications.
In grain handling and storage plants, the addition of small quantities of refined min-
eral oil, vegetable oils, or lecithin to the grain has turned out to be effective for suppressing
dust cloud generation. The method was investigated by Lai et al. (198 1, 1986). One type
of system used in practice is illustrated in Figure 1.132.
Figure 1.1 32 System for spraying small quantities of oil onto grain on a belt conveyor (Courtesy of
American Soybean Association).
