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Title	LIM Simulations of Gas Injection and Reburning in Two Coal-Fired Utility Boilers
Creator	Frederiksen, Richard D.; Dahm, Werner J.A.; Pratapas, John; Serauskas, Robert V.; Bartok, William
Publisher	Digitized by J. Willard Marriott Library, University of Utah
Date	1997
Spatial Coverage	presented at Chicago, Illinois
Abstract	Results are presented from LIM-based simulations of fuel-lean gas reburning (FLGR) in two different types of coal-fired utility boilers to assess the capabilities of such simulations for supporting gas reburning system development. In the first of these boilers - a 112 MWe roof-fired pulverized coal unit (Duquesne Light Company's Elrama Unit 2 - the simulations were able to identify the origins of several unexpected factors that limited the NOx reduction attainable with the original reburn system design. The simulations also indicated specific changes in the gas injection system to achieve higher levels of NOx reduction at lower levels of gas input. In the second boiler - a 327 MWe cyclone fired unit (Commonwealth Edison's Joliet Unit 6 - the simulations were conducted in advance of any field data from the unit. Results correctly predicted all aspects of the reburn system performance subsequently measured under full load conditions without steam injection. These include quantitative predictions of the reduction in NOx emissions and increase in CO emissions. These results indicate that LIM-based simulations provide an effective way of obtaining accurate a priori assessment of the performance of gas reburning systems in a wide range of coal-fired utility boilers.
Type	Text
Format	application/pdf
Language	eng
Rights	This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee.
Conversion Specifications	Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth.
Scanning Technician	Cliodhna Davis
ARK	ark:/87278/s6h134mc
Setname	uu_afrc
ID	13772
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6h134mc

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Title	Page 25
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OCR Text	Show ACKNOWLEDGEMENTS This work was supported by the Gas Research Institute (GRI) under GRJ Contract Nos. 5093- 260-2723 and 5096-260-3810. Dr. Quang-Viet Nguyen of Scientific and Engineering Software Development and Dr. Robert Dibble of Panamint Technologies assisted in the chemical kinetics modeling. The field testing at Elrama Unit 2 and at Joliet Unit 6 was performed by Energy Systems Associates (ESA). We are grateful to Dr. Ben Breen, Joe Urich, and Roger Glickert of ESA for providing test results as well as detailed information about the boilers, and to Duquesne Light Company and Commonwealth Edison for providing additional information about the two boilers. REFERENCES Chang, C.H.H., Dahm. WJ.A. and Tryggvason. G. (1991) Lagrangian model simulations of molecular mixing, including finite rate chemical reactions, in a temporally developing shear layer; Physics of Fluids A, Vol. 3, pp. 1300-1311. Dahm, WJ.A. & Tryggvason, G. (1996) Simulation of turbulent flow and complex chemistry by Local Integral Moment (LIM) modeling; Proceedings of the 1996 International Gas Research Conference (IGRC). Cannes, France. Dahm. WJ.A.. Tryggvason. G. & Zhuang. M. (1996) Integral method solution of time-dependent strained diffusion-reaction equations with multi-step kinetics; SIAM Journal on Applied Mathematics. Vol. 56. No. 4. pp. 1039-1059. Glickert. RW, Herzau. J.S.. Meskimen. R.L. & Pratapas. J.M. (1997) Application fuel lean gas reburn technology at Commonwelath Edison's Joliet Generating Station 9; Proceedings of the EPRI/DOE/EPA Combined Utility Air Polltant Control Symposium (The MEGA Symposium). Washington. D.C. Suresh. N. C. Dahm, WJ.A. & Tryggvason, G. (1994) LIM modeling of chemical reactions in spatially and temporally developing shear flows. AIAA Paper 94-0870. American Institute of Aeronautics and Astronautics, Washington, D.C. Suresh, N.C., Dahm, WJ.A. & Tryggvason, G. (1996) LIM simulations of mixing and chemical reaction in gas reburning applications; Proceedings of the 1996 AFRC International Symposium, Baltimore, MD. Tryggvason, G. and Dahm, WJ.A. (1990) An integral method for mixing, chemical reactions, and extinction in unsteady strained diffusion layers; Combustion and Flame. Vol. 83. pp. 207-220. Energy Systems Associates (1996) ESA Final report: Controlled gas injection demonstration project at Duquesne Light Company's Elrama Unit 2. Report No. ESA 62264-1065. Energy Systems Associates, Pittsburgh, PA; also GRI Report, Gas Research Institute, Chicago, IL.
Setname	uu_afrc
ID	13771
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6h134mc/13771