Coal combustion characteristic in a circulating fludidzed bed = 순환 유동층에서 석탄 연소 특성 / Geun-Seong Lee.

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In the bubbling and the circulating fluidized bed (7.79 cm I.D. × 260 cm high) combustion, combustion efficiency, temperature profiles and flue gas composition of coal-air system have been determined. Bituminous coal having heating value of 6900 Kcal/kg was employed. Coal particle size of 0.725 and 1.03 mm, excess air of 0, 15, 30 and 45%, bed temperature of 750, 800, 850 and 900℃, feeding rate of 1, 2 and 3 kg/hr, recycle rate of 20 and 40 kg/hr were employed for combustion studies. In the bubbling and the circulating fluidized bed combustion, combustion efficiency for the circulating fluidized bed combustion is higher than for the bubbling fluidized bed, and temperature profile is relatively uniform through the whole bed in the circulating fluidized bed combustion. Combustion efficiency increases with increasing excess air and bed temperature, decreases with increasing particle size in the bubbling and the circulating fluidized bed combustion. Combustion efficiency relatively increases with increasing recycle rate of unburn coal in the circulating fluidized bed combustion. The ratio of $CO/CO_2$ decreases with increasing bed temperature and excess air, and the ratio of $O_2/(CO + CO_2)$ decreases with increasing bed temperature in the bubbling and the circulating fluidized bed combustion.
Advisors
Lee, Won-Kook이원국
Description
한국과학기술원 : 화학공학과,
Publisher
한국과학기술원
Issue Date
1983
Identifier
63717/325007 / 000813532
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 화학공학과, 1983.2, [ [vi], 82 p. ]

URI
http://hdl.handle.net/10203/29279
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=63717&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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