병류형 로타리 킬른의 열적 특성에 관한 연구
A Study on the Thermal Characteristics of Parallel-flow Rotary Kiln
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Abstract
A theoretical model was developed for parallel-flow rotary kiln and computational study was conducted to find the thermal characteristics. One dimensional model with the variations of heating distribution, length of heating zone, excess air ratio and revolution was considered. The comparison of parallel-flow rotary kiln with that of counter-flow was conducted. It is found that the variation of temperature of solid is not great for the zone that is following flame-heating zone. This zone is good to take the special treatment because thermal deviation is small and contacting time is enough for another treatment. Increase of excess air ratio have the effect of decreasing solid temperature. But this effect of decreasing solid temperature goes small for the great excess air ratio. The heating is efficient for the flame which has the maximum heating at the central region of the full length.
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