Odor
Control Scrubbers, Including Tower Packing
FAQ
Q. What’s a realistic efficiency target for an
odor control scrubber?
A. Many
odors, including both those that are formally regulated and those
that
are “nuisance” odors, are detectable below 1 ppm. Therefore, an
odor control scrubber
that warrants a mass reduction to below 1.0 ppmv is needed.
Q.
Is there a practical “high” or “low” air volume for a single
odor control scrubber?
A. The
volume of gas that can be accommodated by a single stage odor
control
scrubber assembly is between 25 scfm (6” Ø) to 75,000 scfm (15’ Ø)
Q.
Is it possible to engineer an odor control scrubber for both
odors and corrosives?
A. Yes, we
can design an odor control scrubber system can simultaneously reduce
N/S based odors and other industrial corrosives, both alkali and
acid-based.
Q.
Will an odor control scrubber tolerate particulate and other
contaminants?
A.
Extol Hydro Technologies odor control scrubbers are unaffected
by dirty gas streams that may contain submicron and larger
particulate, and various inorganic scrubber compounds in addition to
the primary odor constituent.
Q.
Is there an odor control scrubber that uses very little
water, even when loadings vary?
A. We can
design an odor control scrubber that is engineered specifically to
use very little water and to yield a clean stack under all loading
conditions. Water usage is always dependent on the inlet load and
contaminant, salt generation and, most importantly, the heat
generated from the first two items. Knowing the inlet load in
lbs./hr. or ppmv on a consistent basis, will help with the purge
water to waste chemical usage ratio.
Q.
How important is packing media to the efficiency of an odor control
scrubber?
A. Packing
media is important. If chosen properly, it helps minimize the
design size of the odor control scrubber. Media also influences odor
control scrubber efficiency: if it provides maximum surface contact
between the gas and the scrubbing liquid, it facilitates continuous
formation of droplets throughout the packed bed. This is what
allows scrubbing efficiency to be consistently high and operation
costs overall to be kept to a minimum.
Q. Are there other physical characteristics of packing
media used in an
odor control scrubber that are important?
A. Yes
– if the media is engineered for superior wetting, it will help
maintain liquid distribution throughout the packed bed, which also
impacts odor control scrubber efficiency.
Q. Is occasional clogging of the odor control scrubber
tower packing inevitable?
A. No,
some odor control scrubber packing won’t clog under any operating
conditions, because it has no flat surfaces or minute openings to
harbor particulate. This particular design also prevents compression
interlock, a common phenomena which decreases
the operating efficiency of the odor control scrubber.
Q. If the process changes, how easy is it to adapt the odor
control scrubber to the new requirement?
A. Our
well-engineered odor control scrubbers are highly adaptable to new
requirements. A change on chemical feed pending the new containments
and a re-address to the systems overall reduction efficiency
calculations for the new parameters, SCFM, inlet loads and
contaminate types versus new required abatement parameters for that
specific location would need to be done prior to scrubber process
changes and re-start under the new conditions.
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