Page 3172 - Flipbook_SolidDesignSoutheast2020

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4. What Guidelines Exist for Figure 4: C. Deploy fixed, AC-powered provide real-time alerts via text Januar y 2019
Appropriate Control of Casella solutions designed for continu- message or email should limits
Combustible Dust? Dust ous use in high-risk areas. Data be exceeded. Reports can easily
Specific regulations exist for certain Detective from these devices can be made be automatically sent to multiple
industries, such as OSHA Grain available remotely using a web- users, allowing for quick inter-
Handling Facilities Standard 29 CFR based interface, and they can vention as needed.
1910.272, but awareness training,
good housekeeping practices, strong
safety documentation for specific
materials, and adoption of best
practices for dust control—such as
those laid out by the National Fire 3HUIHFWLRQ is
Protection Agency (NFPA)—should Grinding and Classifying
be in place to minimize risks posed
to 10 Microns
by combustible dust.
5. How Can Combustible 3HUIHFWLQJ 3DUWLFOH 6L]H
Dust Levels Be Effectively
Measured? 7KH 6WXUWHYDQW )&0 $LU &ODVVLILHU 0LOO JULQGV DQG FODVVLILHV D
The only way to know if com- ZLGH UDQJH RI PDWHULDOV LQFOXGLQJ IRRG LQJUHGLHQWV FKHPLFDOV
bustible dust levels are posing SKDUPDFHXWLFDOV DQG PLQHUDOV WR OHVV WKDQ PLFURQV LQ RQH
a hazard is to conduct measure- VWHS 7KH )&0 PHHWV 86'$ $ 6DQLWDU\ 6WDQGDUGV ZLWK LWV
ments. Here are a few options to 4XLFN &OHDQ 'HVLJQ DQG LV DYDLODEOH ZLWK D ZDVKLQJ DQG
consider: VDQLWL]LQJ VWDWLRQ IRU LPPHGLDWH FRQWDFW SDUWV FKDQJH RYHU RU
A. Perform a walk-through survey PLQXWH ZDVK F\FOH
using a hand-held sampling
device (Figure 3) that gives
real-time indication of dust
concentrations. This is useful
for determining the effective-
ness of control measures such
as local ventilation systems.

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PF-18L-S PFM-S
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SCREW FEEDER FEEDER MODEL

Feed chamber Patented Thayer
with independently Scale “U-Trough”
driven agitator hopper assures
assures precise, reliable metering.
reliable delivery Proven ability
of material to to feed difficult
Figure 3: Casella hand-held sampler the feed screw. powders.

B. Consider leaving air sampling
pumps unattended with real-
time sampling devices housed
in durable portable cases (figure
4) on a short-term basis. The Gravimetric Feeders for
systems determine dust concen-
tration using a gravimetric filter Powder Flow Control.
and a time-history profile, allow-
ing issue identification.
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