Journal of the Korean Society of Combustion (한국연소학회지)

The Korean Society of Combustion (한국연소학회)
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Rotary Kiln Flame and Heat Transfer Model - Analysis of Thermal Performance according to Fuel

로터리킬른 화염 및 열전달 모형 - 연료에 따른 열 성능 분석 사례

  • 최동환 (한국과학기술원 기계공학과) ;
  • 최상민 (한국과학기술원 기계공학과)
  • Received : 2016.09.09
  • Accepted : 2017.09.13
  • Published : 2017.12.30
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Abstract

This paper is to suggest a simple flame model for the analysis of an internal flame of rotary kilns and to present the application cases. Reaction rates in the multi combustion stages of the selected solid fuel were calculated considering the reaction rates with the Arrhenius type equations. In addition, primary and secondary air flow arrangement were considered. As a simple application case, the combustion trends according to the different solid fuels were described. Improved operating conditions as related with the fuel characteristics were shown to be important for the stable combustion characteristics and the performance of the reactors as defined by the exit temperature of the solid materials.

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References

  1. A.S. Mujumdar, Handbook of Industrial Drying, Taylor & Francis, 2006.
  2. D.S. Ha, S.M. Choi, Efficient Energy Management for Pyro-processing of Solids - (1) Heat & Mass Balance and Evaluation, J. Korean Soc. Combust., 21(1) (2016) 18-30 https://doi.org/10.15231/jksc.2016.21.1.018
  3. K.S. Mujumdar, V.V. Ranade, Simulation of Rotary Cement Kilns Using a One-dimensional Model, Chem. Eng. Research and Design., 84(A3) (2006) 165-177. https://doi.org/10.1205/cherd.04193
  4. J.P. Gorog, T.N. Adams, J.K. Brimacombe, Regenerative Heat Transfer in Rotary Kilns, Metallurgical Transactions., 13B (1982) 153-163.
  5. T.G. Eom, S.M. Choi, Performance Evaluation of a Flash Dryer and a Rotary Kiln Dryer for Upgrading Low Rank Coal, J. Korean Soc. Combust., 20(2) (2015) 1-13. https://doi.org/10.15231/JKSC.2015.20.2.001
  6. M.J. Eom, T.J. Han, H.K. Lee, S.M. Choi, Performance Analysis Modeling for Design of Rotary Kiln Reactors, J. Korean Soc. Combust., 18(3) (2013) 9-23. https://doi.org/10.15231/jksc.2013.18.3.009
  7. H.K. Lee, S.M. Choi, The Performance Evaluation of The Rotary Kiln: Stepwise Dimensional Model and Case Analysis, The 47th KOSCO symposium, 2013 33-34.
  8. D.S. Ha, S.M. Choi, The Performance Evaluation of The Rotary Kiln: One-dimensional Model Considering The Heat Transfer Through The Inner Wall, The 47th KOSCO symposium, 2013 89-90.
  9. T.G. Eom, S.M. Choi, The Performance Evaluation of Staged Cyclones and Rotary Kiln Calciner, The 50th KOSCO symposium, 2015 249-252.
  10. J.I. Yang, A Dynamic Performance Prediction Model for a Circulating Fluidized Bed Boiler., Master's Dissertation, KAIST, (2013)
  11. W.P. Jones, R.P. Lindstedt, Global Reaction Schemes for Hydrocarbon Combustion, Combust. Flame., 73 (1988) 233-249. https://doi.org/10.1016/0010-2180(88)90021-1
  12. D.R. Vandervaart, The Chemistry of Premixed Hydrocarbon/Air Combustion in a Fluidized Bed, Combust. Flame., 71 (1988) 35-39. https://doi.org/10.1016/0010-2180(88)90103-4
  13. I.W. Smith, The Combustion Rates of Coal Chars: A Review, The 19th International Symposium on Combustion, The Combust. Insti., Pittsburgh, 1975, 1045-1065.
  14. A.A. Boateng, Rotary Kilns: Transpoert Phenomena and Transport Processes, Butterworth-Heinemann, 2008.
  15. S.H. Tscheng, A.P. Watkinsion, Convective Heat Transfer in a Rotary Kiln, Can. J. Chem. Eng., 57 (1979) 433-443. https://doi.org/10.1002/cjce.5450570405
  16. H.H. Smith, FURNACE-TYPE LUMBER DRY KILN Operation of an Experimental Unit, Madison, Wis.: US Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1945.
  17. G.K. Gaurav, K. Shabina, Analysis of Temperature Profile and% Metallization in Rotary Kiln of Sponge Iron Process through CFD. J. Taiwan Inst. Chem. Eng., 63 (2016) 473-481. https://doi.org/10.1016/j.jtice.2016.02.035