A MACT route map and summary was reviewed as a way to launch the MACT discussion
yesterday. There are unique site specific factors which are even more important
in MACT than in MATS. The reason is that in cement, brick and other industrial
processes the material being processed may create more air toxics than the fuel.
The MACT route map cataloged the issues and options:
Issues
o
Regulatory
o
Economic
•
Plant Specific
Options for
The special focus yesterday was on dry sorbent injection.
This technology has risen to the top of the list in terms of relative
importance. One reason is that it does not require much capital. Another is that
the process is quickly implemented.
Many industrial facilities have waited to make a MACT choice and therefore are
now limited to those solutions which can meet the deadlines. The complete MACT
route map and summary is found in Power
Plant Air Quality Decisions.
There were two speakers yesterday. Both addressed the use of hydrated lime.
Pat Mongoven of Mississippi Lime compared several types of hydrated lime.
DSI with hydrated lime can allow SO2 and HCl reduction for both
industrial boilers and cement manufacturers.
MACT Compliance Options, by Pat Mongoven, Mississippi Lime, HTH 5-7-15
DSI with hydrated lime can allow SO2 & HCl reduction for both industrial
boilers and cement manufacturers. Depending on the application and the
facilities goals, a High Reactivity Hydrate may allow better removal or lower
costs. In cement scrubber towers, DSI gave comparable removal rates to feeding a
liquid slurry of hydrated lime directly to the scrubber tower.
Revision Date: 5/7/2015
Tags: 221112 - Fossil Fuel
化石燃料, 327310 - Cement Manufacturing
水泥生产,
Mississippi Lime, Lime, MACT
Marty Dillon
of Lhoist enumerated
advantages of a unique lime product.
Sorbacal SPS is a lime hydrate which combines porosity and chemical treatment to
provide much higher SO2 and HCl capture than alternatives. A number
of trial and actual installations support the claim.
There was considerable discussion relative to balance of plant impacts. Marty
cites information showing the at Sorbacal SPS results in lower pressure drop in
baghouses and lower particulate emissions in precipitators than finely ground
lime such as is provided by others. Curt Biehn of Mississippi Lime wanted more
evidence. He cited papers showing that lime injection may enhance precipitator
performance. He also pointed out that the lime reacts with acid gases to form
larger particles.
Marty showed evidence that the Sorbacal greatly reduced the leachate potential
of selenium and other air toxics, so there can be a positive benefit relative to
landfill alternatives and cost.
Flue Gas Treatment Specialist, by Marty Dillion, Lhoist - HTH 5-7-15
Sorbacal SPS is a lime hydrate which combines porosity and chemical treatment
to provide much higher SO2 and HCl capture than alternatives. A number of trial
and actual installations support the claim.
Revision Date: 5/7/2015
Tags: 221112 - Fossil Fuel
化石燃料, 327310 - Cement Manufacturing
水泥生产,
Lhoist North America, Lime, MACT
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recording.
MACT Update Webinar - Hot Topic Hour - May 7, 2015
There are unique site specific factors which are more important in MACT than
in MATS. The reason is that in cement, brick and other industrial processes the
material being processed may create more air toxics than the fuel. The special
focus for this Hot Topic Hour was on dry sorbent injection. The use of hydrated
lime was also discussed.
Revision Date: 5/7/2015