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

Sung, Yon-Mo (부산대학교 기계공학부 대학원)
An, Jae-Woo (부산대학교 기계공학부 대학원)
Moon, Cheor-Eon (부산대학교 기계공학부 대학원)
Ahn, Seong-Yool (부산대학교 기계공학부 대학원)
Kim, Sung-Chul (한국전력공사 전력연구원)
Seo, Sang-Il (한국전력공사 전력연구원)
Kim, Tae-Hyung (한국전력공사 전력연구원)
Choi, Gyung-Min (부산대학교 화력발전에너지분석기술센터)
Kim, Duck-Jool (부산대학교 화력발전에너지분석기술센터)
Publication Information
Journal of the Korean Society of Combustion / v.15, no.4, 2010 , pp. 65-73 More about this Journal
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
Blended coals; Pulverized coal combustion; Activation energy; Particle size; Combustion characteristics;
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Times Cited By KSCI : 2  (Citation Analysis)
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