Cement Air Quality Total Knowledge Quest
There is extensive knowledge relative to cement air quality on this website. You can access through “cement” in “applications” or by company, person, or product. Here are some of the more specific links prior to February 1, 2011.
Here are links to our September 16, 2010 Hot Topic Hour Recording and Power Points of the Presenters
This is a quick summary of the webinar and a link to the recording
Gossman, GCI power points, September 16, 2010
Yonley power points September 16, 2010
Barnett, EPA power points September16, 2010
Box power points September 16, 2010
Trinity Consultants Power Points, September 16, 2010
Barnett's Comments on How the Final Limits were Derived are Important
Changes Made to Final MACT Standards After Proposal
Received numerous comments
regarding our statistical approach used to establish emissions limits. We made
appropriate changes in the statistical methods that more accurately quantify
variability.
Some of the raw materials data
used to develop the mercury standard at proposal was not representative. Based
on additional data the mercury standard was revised upward.
Additional THC data received
from industry during the comment period allowed us to more accurately determine
variability of THC emissions and set a more representative MACT emissions limit.
Received additional HCl test
data. However, the calculated HCl floor was below the HCl minimum quantification
limit, so the minimum quantification limit was the basis of HCl MACT.
The compliance method for particulate matter (PM) was changed from EPA Method 5 testing and use of bag leak detectors to the use of PM continuous emissions monitors and a 30 day rolling average.
Other Cement Information on the Website
There is a great deal of additional and currently relevant information on the free website under the cement link in “applications.”
This includes pictures of the individuals and summaries of the products for companies exhibiting at the IEEE PCA cement conference last spring in Colorado. Products of the exhibitors included stack testing, scrubbers, ammonia, activated carbon, regenerative thermal oxidizers, fans, crushers, steel fabrication, consulting, instrumentation and valves. The main link also leads to other valuable data.
This recorded presentation was nearly identical to the one given at the March conference by McIvaine and covers the MACT technology as well as other air pollution issues facing the cement industry.
Link to Text Information (link to a recording summarizing the technology)
Text Information (slides with a good summary of the technologies available)
There are even several papers on CO2 capture here is one.
Holcim is Pursuing CO2 Reduction
There are papers on NOx Reduction including one by Al Linero
SNCR NOx at U.S. Cement Plants
There is also coverage of European activity such as
PCME has Particulate CEMS to Meet the European Standards for Cement Kilns Classified as Co-Incinerators
High Dust SCR Succeeds at Cementeria di Monselice
Earlier Webinars by McIlvaine
CEMENT MACT OVERVIEW - 03-12-10
Cement MACT Hot Topic Hour on March 12, 2010
Continues to Provide Insights
Cement companies rated the 90 minute webinar on March 12 as highly as they did the one in February. The recordings, power points, and biographies are posted on the Cement site http://www.mcilvainecompany.com/SURS/subscriber/Default.htm
R. Landreth, Business Development Manager
for Albemarle Sorbent Technologies,
discussed potential solutions for mercury control
in the cement industry. Albermarle has a concrete
friendly sorbent. One novel solution to the
problem is to inject this sorbent into the
existing collector at the time of highest mercury
emissions. During this period the CKD would not be
recycled to the kiln but would be directed to the
cement finishing process. The sorbent would not
affect the concrete quality. The big advantage is
the capital cost savings by eliminating a second
particulate control device. This would also save
on energy. The question raised by participants and
still to be answered with further testing is, “How
many plants could benefit enough from this
approach?”
Dr. Constance (Connie) L. Senior, Manager Engineering Research & Development at Reaction Engineering International, discussed measurement and control of mercury emissions in cement kilns. She observed that mercury analysis in coal-fired power generation is complex, but the challenge in cement is much greater. She pointed out that not only are there process changes from hour to hour but there are changes throughout a four day period. Studies show good correlation between the oxidation of mercury and the capture in scrubbers associated with coal-fired boilers. However, the same correlation has not been experienced in four cement plant scrubbers tested. During the question and answer period there was speculation on the contribution of re-emissions.
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Webinar Recording |
Gerald Young, Vice-President of Process and Environmental at Penta Engineering Corporation, traced the sources of carbon dioxide emissions and compared some conventional control technologies. One way to reduce emissions is to replace limestone with slag or other calcium sources which are not carbonate compounds.
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Webinar Recording |
Seth Morrell of Altech Environment USA presented a general overview of the emissions monitoring requirements of the cement MACT. Mass particulate monitors using the beta gauge principle allow accurate measurement of particulate in wet stacks. Since most cement plants are facing scrubber installations which will be downstream of the fabric filter, it will be highly desirable, if not necessary, to measure particulate after the scrubber.
John Cooper of Cooper Environmental provided a paper which was submitted to EPA last August in response to requests for input on the MACT rule. The paper casts doubt on the reliability of PM as a surrogate for metal toxics. Since HAPS during startup, shutdown and malfunction must be included, the surrogate approach becomes highly problematic. The multi-metals analyzer can measure both mercury and 25 metal toxics for a cost similar to the conventional mercury analyzer. Furthermore this analyzer has been vetted on a hazardous waste incinerator. One interesting aspect of the multi-metals analyzer would be the ability to measure the total harm rather than just the weight of metal HAPS. Since some metal HAPS are 1,000 times more toxic than others, it does not make sense to lump them together based on total weight. McIlvaine has created a Universal Environmental Burden Index to relate all toxics as well as other pollutants. http://www.mcilvainecompany.com/SURS/subscriber/Default.htm
THE FIRST CEMENT MACT OVERVIEW - 02-12-10
First MACT Webinar Well Received by the Cement Industry. Here is one of several similar comments received from cement company participants in the McIlvaine February 12 webinar.
Setup: Excellent
Ease of use: Excellent
Performance: Excellent
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Comments:
Excellent presentations, direct to the issues
facing our company.
Many novel ideas to evaluate for the industry.
Thanks!
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Speakers were:
Andy O’Hare, Vice President for Regulatory Affairs, Portland Cement Association (PCA), presented the Portland Cement Association’s perspectives on the proposed Portland Cement NESHAP.
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Webinar Recording |
David Gossman, President of Gossman Consulting, Inc., discussed technical solutions for the cement industry including process modifications and use of circulating fluidized bed adsorbers.
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Webinar Recording |
Yougen Kong, P.E., Ph.D., Technical Development Manager, Solvay Chemicals, Inc. discussed Solvay’s experience with the application of dry injection of sodium sorbents to control HCl, SO2, SO3 and mercury from cement kilns at many cement plants throughout Europe.
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Webinar Recording
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Dennis Laudal of the Energy & Environmental Research Center at the University of North Dakota, covered the issues associated with the use of activated carbon for mercury control in cement kilns including the proposed regulatory requirements.
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Webinar Recording |
Ron Hawks, Vice President Design and Engineering, Environmental Quality Management, Inc., discussed the impact of proposed MACT limits for mercury and possible solutions.
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Webinar Recording |