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Title	Fuel-Lean Gas Reburn (FLGR) Technology for Achieving NOx Emissions Compliance Application to a Tangentially-Fired Boiler
Creator	Frederiksen, Richard D.; Dahm, Werner J.A.; Tryggvason, Gretar; Breen, Bernard P.; Glickert, Roger; Urich, Joseph A.; Pratapas, John M.; Serauskas, Robert V.
Publisher	Digitized by J. Willard Marriott Library, University of Utah
Date	1998
Spatial Coverage	presented at Maui, Hawaii
Abstract	The application of fuel-lean gas reburn (FLGR) technology for NOx emissions reduction from a tangentially-fired coal-burning utility boiler is described. Design of the FLGR system involved a combination of prior field experience with the technology in other utility boiler designs, together with advanced LIM-based simulations of the injected gas mixing and reaction processes within the boiler. Parametric simulations were conducted to determine an initial FLGR system design for the boiler. Initial testing of the system performance showed higher than expected CO emissions at all boiler loads. The origin of these elevated CO levels was traced to interactions between the injected gas and the coal burnout process that are specific to tangentially-fired boiler designs employing close-coupled overfire air. Modifications to the original F L GR system were developed that led to reduced interactions and thus to significantly lower CO emissions.
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Format	application/pdf
Language	eng
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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/s6xw4nf2
Setname	uu_afrc
ID	11492
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6xw4nf2

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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 GRI Contract Nos. 5093- 260-2723 and 5096-260-3810. Field testing at Riverbend Unit 7 was performed by Energy Systems Associates (ESA). REFERENCES [1] 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. [2J 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. [31 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. [4] Frederiksen, R.D., Dahm, WJ.A., Pratapas, J.M., Serauskas, RV. & Bartok, W (1997) LIM simulations of gas injection and reburning in two coal-fired utility boilers. Proceedings of the 1997 AFRC International Symposium. Chicago, IL. [51 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. [61 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. [71 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.
Setname	uu_afrc
ID	11491
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6xw4nf2/11491