DSI was Hot Topic Agenda June 10
The Hot Topic Hour yesterday covered direct sorbent injection. It was a
collaborative discussion based on information posted on the free website
Dry Scrubbing - Continuous Analyses.
The discussion addressed the following questions:
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Should you use calcium or sodium?
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Should you grind Trona and should you buy special lime type?
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How much storage should you have?
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Where do you inject the sorbent with and without carbon injection?
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Can you use precipitators?
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What about a hot gas filter?
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What efficiencies and sorbent usage can you expect?
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What do you do with the reagent flyash waste?
The general discussion was augmented by three short presentations.
Paul Farber,
Principal, P. Farber & Associates, LLC gave a good overview and
was able to consolidate the basic aspects of DSI as follows:
Tony Licata,
Principal, Licata Energy &
Environmental Consultants, Inc. indicated that the new
regulations regarding startup and shut down emissions require utilities to meet
the following challenges.
Marc Sylvester,
Vice-president, Sales, Midwest Energy Emissions Corp
(ME2C) explained how their custom sorbents provide both mercury and trim SO2
control.
Robert Brogli,
Senior Manager for Business Development, NAES Engineering & Construction
Group emphasized the need to consider the ash implications and also the
potential brown plume.
Michael (Mike) Atwell,
Market Development Manager, Solvay Chemicals Inc indicated
that most of the recent activity is due to the NAAQS of 75 ppm SO2
and realization that to meet 2018 deadlines the time for action is now.
Direct Sorbent Injection Webinar - Hot
Topic Hour July 10, 2014
The Hot Topic Hour covered direct sorbent injection. It was a collaborative
discussion based on information posted on the free website: Dry Scrubbing -
Continuous Analysis
Revision Date: 7/10/2014
Michael (Mike) Atwell, Market Development Manager, Solvay Chemicals Inc
indicated that most of the recent activity is due to the NAAQS of 75 ppm SO2 and
realization that to meet 2018 deadlines the time for action is now.
Revision Date: 7/10/2014
Marc explained how their custom sorbents provide both mercury and trim SO2
control.
Revision Date: 7/10/2014
Tony Licata, Principal, Licata Energy & Environmental Consultants, Inc.
indicated that the new regulations regarding startup and shut down emissions
require utilities to meet the following challenges.
§
How soon can we turn or turn off on DSI and carbon systems?
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Prevent deposits forming in ductwork.
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Sorbent contact with acid gases/Hg at low flow conditions – mass transfer.
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Does the chemistry work at lower temperatures seen during startup/shutdown?
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Contact time.
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Impacts on balance of plant.
Revision Date: 7/10/2014
Paul Farber, Principal, P. Farber & Associates, LLC gave a good overview and was
able to consolidate the basic aspects of DSI as follows:
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98% reduction of SO3, H2SO4, and HCl possible with DSI
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90% reduction of SO2 with DSI has been demonstrated
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High percentage reduction of SO2 with DSI can result in the sorbent and reaction
products entering the PM control device to be as much as the flyash loading
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Where Trona or SBC is injected the collected material will have significant
levels of sodium
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Leachate tests of flyash/Trona/SBC mixtures have shown increased levels of
metals such as selenium as well as sodium.
Revision Date: 7/10/2014