JV Task-Long-Kiln NOx Reduction Study

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Field sampling was conducted by the Energy & Environmental Research Center at two Lafarge North America cement kiln locations in Canada. Emissions including SO{sub x}, NO{sub x}, and particulate were measured and reported at various locations throughout the kilns. At each site data were collected on two kilns during field sampling. However, only Kiln 1 at the Ravena site was utilized for modeling efforts. Experimental work was then conducted to estimate the effectiveness of various NO{sub x} control techniques on limiting both NO{sub x} and SO{sub x} emissions in cement kiln exhaust. Theory-based models were constructed to estimate both NO{sub ... continued below

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Folkedahl, Bruce; Strege, Joshua; Schmidt, Darren & Kong, Lingbu July 1, 2008.

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Field sampling was conducted by the Energy & Environmental Research Center at two Lafarge North America cement kiln locations in Canada. Emissions including SO{sub x}, NO{sub x}, and particulate were measured and reported at various locations throughout the kilns. At each site data were collected on two kilns during field sampling. However, only Kiln 1 at the Ravena site was utilized for modeling efforts. Experimental work was then conducted to estimate the effectiveness of various NO{sub x} control techniques on limiting both NO{sub x} and SO{sub x} emissions in cement kiln exhaust. Theory-based models were constructed to estimate both NO{sub x} and SO{sub x} emissions from cement kilns. These models were then applied to estimating the impact of various NO{sub x} control strategies on kiln exhaust emissions. The sulfur model constructed as part of this work was successful at predicting SO{sub 2} emissions and sulfur capture in the Alpena kiln. This model is designed to run as a postprocessing step that uses the output of a NO{sub x} model as input. With an accurate NO{sub x} model, the sulfur model may prove to be a valuable tool in estimating the impact of kiln modifications on sulfur emissions. The NO{sub x} model was also applied to model several operating scenarios on three of Lafarge's kilns: Alpena 20/21, Alpena 22/23, and Ravena 1. The predictions of the flue gas temperature at the kiln feed end, the kiln shell heat loss, the quality of clinker, and the excess O{sub 2} in the flue gas are consistent with the audit data. The developed simulation tool in this project has proven to be an effective way to investigate the NO{sub x} emissions, to optimize kiln performance, and to assess changes in operating condition on kiln performance.

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  • Report No.: None
  • Grant Number: FC26-98FT40321
  • Office of Scientific & Technical Information Report Number: 989404
  • Archival Resource Key: ark:/67531/metadc1015315

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 1, 2008

Added to The UNT Digital Library

  • Oct. 14, 2017, 8:36 a.m.

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  • Dec. 18, 2017, 6:12 p.m.

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Folkedahl, Bruce; Strege, Joshua; Schmidt, Darren & Kong, Lingbu. JV Task-Long-Kiln NOx Reduction Study, text, July 1, 2008; United States. (digital.library.unt.edu/ark:/67531/metadc1015315/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.