World Grain - November 2005 - 28

grainoperations

Keeping the dust down
A good housekeeping program goes a long way
toward preventing grain dust explosions
by Gary Imhoff and Suzi Fraser Dominy

The four elements required for a grain dust explosion are:
a fuel source, such as grain dust; an ignition source, such as a
spark from equipment malfunction or friction; air, which is always present in facilities and all three elements combined in a
confined space, such as leg or conveyor housing, head houses,
tunnels, boot pits or silos.
Good housekeeping, the use of good managerial controls and
written housekeeping procedures, will reduce the chance of
This is the first in a two-part series on grain dust control. A second
article will appear in an upcoming issue of World Grain.

grain dust from accumulating to an amount that could become
airborne and be a fuel source for an explosion. Also, supervisory
personnel must be accountable to ensure that housekeeping is
being done to provide a safer work environment for employees.
There are several ways to manage dust control to reduce
housekeeping chores.
BASEMENT AND TUNNEL PRESSURIZATION
With pressurized air in basements and tunnels that is greater
than the pressure inside of legs, conveyors, and augers, the
amount of dust emitted from these pieces of handling equipment can be reduced. Increased pressure in these areas also
helps to reduce the amount of fugitive
dust that may enter around doors, manholes, etc. Pressurizing may also help to
keep basements and tunnels dryer, except when outside air humidity is high.
BAG HOUSE FILTRATION SYSTEM
Pneumatic systems can be used to
remove dust emissions from grain handling equipment. These systems require
additional managerial skills, as they
are another part of the grain handling
process that must be in good working
order. It is very important that the manufacturer's operator manual be followed
to make sure that the filtering system is
operating at maximum efficiency.
Filter bags (socks) must be cleaned
or replaced according to the manufacturer's recommendations. Bags that are
plugged, or have holes in them, are not
effectively removing dust from the air
stream, and therefore the efficiency of
Public Elevator at Corpus Christi, Texas, U.S.
Photo courtesy of Wheeler Photos.

28

November 2005 / World Grain / www.World-Grain.com



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World Grain - November 2005

Table of Contents for the Digital Edition of World Grain - November 2005

Contents
World Grain - November 2005 - 1
World Grain - November 2005 - 2
World Grain - November 2005 - 3
World Grain - November 2005 - Contents
World Grain - November 2005 - 5
World Grain - November 2005 - 6
World Grain - November 2005 - 7
World Grain - November 2005 - 8
World Grain - November 2005 - 9
World Grain - November 2005 - 10
World Grain - November 2005 - 11
World Grain - November 2005 - 12
World Grain - November 2005 - 13
World Grain - November 2005 - 14
World Grain - November 2005 - 15
World Grain - November 2005 - 16
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World Grain - November 2005 - 18
World Grain - November 2005 - 19
World Grain - November 2005 - 20
World Grain - November 2005 - 21
World Grain - November 2005 - 22
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World Grain - November 2005 - 24
World Grain - November 2005 - 25
World Grain - November 2005 - 26
World Grain - November 2005 - 27
World Grain - November 2005 - 28
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