Journal of the Korean Society of Combustion (한국연소학회지)

The Korean Society of Combustion (한국연소학회)
권호 표지

Effect of Particle size and Blending Ratio on Thermo Reaction and Combustion Characteristics in Co-firing with Bituminous and Sub-bituminous Coals

역청탄과 아역청탄 혼합연소조건에서 입자크기와 혼소율이 열물성반응과 연소특성에 미치는 영향

  • 성연모 (부산대학교 기계공학부 대학원) ;
  • 안재우 (부산대학교 기계공학부 대학원) ;
  • 문철언 (부산대학교 기계공학부 대학원) ;
  • 안성율 (부산대학교 기계공학부 대학원) ;
  • 김성철 (한국전력공사 전력연구원) ;
  • 서상일 (한국전력공사 전력연구원) ;
  • 김태형 (한국전력공사 전력연구원) ;
  • 최경민 (부산대학교 화력발전에너지분석기술센터) ;
  • 김덕줄 (부산대학교 화력발전에너지분석기술센터)
  • Received : 2010.07.08
  • Accepted : 2010.10.09
  • Published : 2010.12.31
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Abstract

In order to provide fundamental information for developing reaction model in the practical blended coal power plants, effects of particle size and blending ratio on combustion characteristics and thermal reaction in co-firing with bituminous and sub-bituminous coals were experimentally investigated using a TGA and a laboratory-scale burner. Characteristic parameters including ignition, burnout temperature and activation energy were determined from TG and DTG combustion profiles. Distributions of flame length and mean particle temperature were investigated from the visualization of flames in slit-burner system. As coal particle size decreased and volatile matter content increased, characteristic temperatures and activation energy decreased. The ignition/burnout characteristics and activation energy are linearly influenced by a variation in particle size and blending ratio. These results indicated that the control of the coal blending ratio can improve the combustion efficiency for sub-bituminous coals and the ignition characteristics for bituminous coals.

Keywords

References

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