화학공학소재연구정보센터
Korean Journal of Chemical Engineering, Vol.19, No.6, 1059-1065, November, 2002
Enhancement of Combustion Efficiency with Mixing Ratio during Fluidized Bed Combustion of Anthracite and Bituminous Blended Coal
E-mail:
In order to investigate the effect of mixing ratio of bituminous coal to blended coal on the enhancement of combustion efficiency, combustion experiments of blended coal with anthracite and bituminous are done in a laboratory scale fluidized bed combustor (10.8 cm ID and 170 cm height). The gross heating values of anthracite and bituminous coal used in this study are 2,810 cal/g and 6,572 cal/g, respectively. Experimental parameters are fuel feed rate, superficial gas velocity and mixing ratio of bituminous coal to blended coal. The combustion efficiency increases with the mixing ratio of bituminous coal due to the lower unburned carbon losses and higher burning velocity of bituminous coal. The rate of combustion in the combustor was increased with mixing ratio resulted from a higher burning velocity of bituminous coal. The measured combustion efficiency experimentally is about 3.5-12.4% higher than that of the calculated value based on the individual combustion of anthracite and bituminous coal under the same operating conditions. The optimum mixing ratio (MR) of bituminous coal determined is around 0.75 in this study.
  1. Anthony EJ, Becker HA, Code RK, Liang DT, Stephenson JR, "Combustion of High-Sulfur Eastern Canadian Coals by AFBC," Proc. of the 8th Int. Conf. on FBC, 32 (1985)
  2. Choi JH, Park YS, Son JE, "Present Status of Research and Development of Fluidized Bed Combustion in Korea," Proceeding of the Fourth International Conference on Fluidization, Japan, 507 (1983)
  3. Choi SW, Oh KJ, Jang HT, Tae BS, Doh DS, J. Korean Soc. Environ. Eng., 18, 267 (1996)
  4. Lee JK, Lee KH, Jang JG, Lim JH, Lim JS, Chun HS, HWAHAK KONGHAK, 30(4), 499 (1992)
  5. JUNG Y, PARK D, Korean J. Chem. Eng., 5(2), 109 (1988)
  6. Lee JK, Jang JG, Yoa SJ, Hu CG, Lim JH, Chun HS, J. Korean Solid Waste Eng. Soc., 9, 107 (1992)
  7. Lee JK, Hu CG, Shin YS, Chun HS, Can. J. Chem. Eng., 68, 824 (1990)
  8. Lee JK, Hu CG, No JG, Shin YS, Chun HS, HWAHAK KONGHAK, 26(5), 517 (1988)
  9. Lee JK, Lee KH, Jang JG, Shin YS, Chun HS, J. Chem. Eng. Jpn., 24, 703 (1991) 
  10. Oh KJ, Cho SW, Park TS, Jang HT, J. Korean Soc. Environ. ENg., 17, 369 (1995)
  11. Park YS, Han KH, Yi CK, Son JE, J. Korean Soc. Environ. Eng., 15, 811 (1993)
  12. Radovanovic M, "Fluidized Bed Combustion," Hemisphere Publishing Corp., New York (1986)
  13. Sarofim AF, "Thermal Processing: Incineration and Pyrolysis," Handbook of Solid Waste management, Van Nostrand Reinhold Company (1977)
  14. Song BH, Jang YW, Kim SD, Kang SK, Korean J. Chem. Eng., 18(5), 770 (2001)
  15. Taylor TE, "Experimental Results from an 0.46m-Diameter Fluid-Bed Pilot Plant," Proc. of the 2nd Eng. Found. Conf., 258 (1978)