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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received May 27, 2002
Accepted December 16, 2002

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Pressure Fluctuation Properties in Combustion of Mixture of Anthracite and Bituminous Coal in a Fluidized Bed

Hyun Tae Jang Sang Bum Kim^1† Wang Seog Cha² Sung Chang Hong³ Dong Sup Doh¹

Dept. of Chem. Eng., Hanseo University, Seosan 356-706, Korea ¹Dept. of Chem. Eng., Korea University, Seoul 136-701, Korea ²Dept. of Civil and Environ. Eng., Kunsan Nat’l University, Kunsan 573-701, Korea ³Dept. of Environ. Eng., Kyonggi University, Suwon 442-760, Korea

Korean Journal of Chemical Engineering, January 2003, 20(1), 138-144(7), 10.1007/BF02697199

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Abstract

The combustion characteristics of a mixture of anthracite and bituminous coal were studied in a 0.155 m i.d. fluidized bed combustor (FBC). The properties of the pressure fluctuation for the bed such as the standard deviation, cross-correlation function, dominant frequency and the power spectral density function were obtained through statistical analysis. To interpret the combustion characteristics in the FBC with uniform or multi-sized particles of anthracite-bituminous coal mixture, the properties of pressure fluctuation were determined as a function of the particle size_x000D_ distribution and anthracite mixing fraction. In the present work, it is known that the combustion region could be obtained from the analysis of pressure fluctuation properties, and the mixed-firing of anthracite-bituminous coal is related to the reaction models of both coals and particle size distribution. Moreover, the relation between coal size distribution and static mean pressure, and the ignition region could be obtained from the mean pressure profile.

Keywords

Combustion Characteristics Pressure Fluctuation Anthracite Bituminous Coal Fluidized Bed Combustor

References

Bendart JS, Piersol AG, "Random Data," John Wiley, New York (1971)
Coats AW, Redfern JP, Nature, 201, 68 (1964)
Cooper GR, McGillem CD, "Probabilistic Methods of Signals and System Analysis," Holt, Rinehart and Winston Inc. (1971)
Gregory JW, Brown RC, "Mechanisms of Coal-Water Mixture Combustion in Fluidized Beds," Proceedings of the 1989 International Conference on FBC, 77 (1989)
Jung Y, Park D, Korean J. Chem. Eng., 5(2), 109 (1988)
Kato T, Wen CY, Chem. Eng. Sci., 24, 1351 (1969)
Kim SJ, Cho YJ, Lee CG, Kang Y, Kim SD, Korean J. Chem. Eng., 19(1), 175 (2002)
Larva WJ, Rosendahl SM, Swedberg JF, Thimsen DP, "AFBC Retrofit at Black Dog-Testing Update," Proceedings of the 1989 International Conference on FBC, 729 (1989)
Park YS, Son JE, HWAHAK KONGHAK, 28(3), 320 (1990)
Poersch W, Bahnen R, Wagner R, 10th Int. Conf. on Fluidized Bed Combustion, Atlanta GA, April, 1175 (1988)
Well JM, Myrd JR, Krishnan RP, "Simulation of Large Scale Atmospheric Fluidized Bed Combustion System," Proc. of the 7th Int. Conf. on FBC, 2, 1107 (1982)