Journal of Mechanical Science and Technology

  • 제18권12호
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  • Pages.2303-2309
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  • 2004
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  • 1738-494X(pISSN)
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  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

Characteristics of NOx Emission with Flue Gas Dilution in Air and Fuel Sides

  • Cho, Eun-Seong (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Chung, Suk Ho (School of Mechanical and Aerospace Engineering, Seoul National University)
  • 발행 : 2004.12.01
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초록

Flue gas recirculation (FGR) is a method widely adopted to control NOx in combustion system. The recirculated flue gas decreases flame temperature and reaction rate, resulting in the decrease in thermal NO production. Recently, it has been demonstrated that the recirculated flue gas in fuel stream, that is, the fuel induced recirculation (FIR), could enhance a much improved reduction in NOx per unit mass of recirculated gas, as compared to the conventional FGR in air. In the present study, the effect of FGR/FIR methods on NOx reduction in turbulent swirl flames by using N$_2$ and CO$_2$ as diluent gases to simulate flue gases. Results show that CO$_2$ dilution is more effective in NO reduction because of large temperature drop due to the larger specific heat of CO$_2$ compared to N$_2$ and FIR is more effective to reduce NO emission than FGR when the same recirculation ratio of dilution gas is used.

키워드

참고문헌

  1. Ahn, K. Y., Kim, H. S., Son, M. K., Kim, H. K., and Kim, Y. M., 2002, 'An Experimental Study on the Combustion Characteristics of a Low $NO_x$ Burner Using Reburning Technology,' KSME Internatioal Journal, Vol. 16, No. 7, pp. 950-958
  2. Arai, M., 2000, 'Flue Gas Recirculation for Low $NO_X$ Combustion System,' IJPGC2000-15073, pp. 1-10
  3. Baltasar, J., Garvalho, M. G., Coelho, P., and Costa, M., 1997, 'Flue Gas Recirculation in a Gas-fired Laboratory Furnace : Measurements and Modeling,' Fuel, Vol. 76, No. 10, pp. 919-929 https://doi.org/10.1016/S0016-2361(97)00093-8
  4. Beer, J. M., 1996, 'Low $NO_X$ Burners for Boilers, Furnaces, and Gas Turbines ; Drive Towards the Low Bonds of $NO_X$ Emissions,' Combust Sci. and Tech., Vol. 121, pp. 169-191 https://doi.org/10.1080/00102209608935593
  5. Cho, E. -S., Sung, Y., and Chung, S. H., 2003, 'An Experiment on Low $NO_X$ Combustion Characteristics in a Multi-Staged Burner,' Transaction of KSME (B), Vol. 27, No. 1, pp. 32-38 https://doi.org/10.3795/KSME-B.2003.27.1.032
  6. Feese, J. J. and Turns, S. R., 1998, 'Nitric Oxide Emissions from Laminar Diffusion Flames:Effects of Air-Side versus Fuel-Side Diluent Addition,' Comb. and Flame, Vol. 113, pp.66-78 https://doi.org/10.1016/S0010-2180(97)00217-4
  7. Lang, J., 1994, 'Low $NO_X$ Burner Design Achieves Near SCR Levels,' ASME, PWR-Vol. 24, pp. 127-131
  8. Milani, A. and Saponaro, A, 2001, 'Diluted Combustion Technologies,' IFRF Combustion Journal. Article No. 200101
  9. Wlinning, J. A. and WUnning, J. G., 1997, 'Flameless Oxidation to Reduce Thermal NO-Formation,' Prog. Energy Combust. Sci., Vol. 23, pp. 81-94 https://doi.org/10.1016/S0360-1285(97)00006-3