화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
HWAHAK KONGHAK, Vol.39, No.4, 456-464, August, 2001
Export Citation
난류유동층에서 고속유동층으로의 전이유속에 대한 온도의 영향
Effect of Temperature on Transition Velocity from Turbulent Fluidization to Fast Fluidization in a Gas Fluidized Bed
배달희, 류호정†, 선도원, 진경태, 이동규1
  • 한국에너지기술연구원, 대전 305-343
  • 1충북대학교 공업화학과, 전주 361-763
Dal-Hee Bae, Ho-Jung Ryu†, Dowon Shun, Gyoung-Tae Jin, and Dong-Kyu Lee1
  • Korea Institute of Energy Research, Daejeon 305-343, Korea
  • 1Dept. of Industrial Chemistry Engineering, Chungbuk National University, Chongju 361-763, Korea
E-mail:
초록
난류유동층에서 고속유동층으로의 전이유속에 미치는 온도의 영향을 고찰하기 위해 층물질로 모래(평균입경:0.256 mm, 입자밀도: 2,617 kg/m(3))를 사용한 고온 순환유동층(내경 0.02 m, 높이 2.0 m)에서 emptying time method에 의해 고속유동층으로의 전이유속(U(tr))을 측정 및 고찰하였다. 측정된 고속유동층으로의 전이유속은 온도가 증가함에 따라 증가하였다. 본 실험의 측정값 및 문헌의 보고들과 기존 상관식을 비교하였으며 기존 상관식들 중 Chehboumi 등 [19]의 상관식이 측정값들과 가장 유사한 결과를 나타내었다.
Transition velocity from turbulent to fast fluidization has been measured by emptying time method in a high tem-perature circulating fluidized bed(0.02 m i.d. and 2.0 m high) of sand particle(specific surface mean diameter: 0.256 mm, particle density: 2,617 kg/m(3)) with variation of temperature(15-600 ℃). Measured transition velocity from turbulent to fast fluidization increased with increasing temperature. The previous correlations on transition velocity to fast fluidization compared with the meas-ured values. Among the previous correlations, correlation of Chehbouni et al.[19] shows relatively good results.
Keywords:Gas-Solid Fluidization;Transition Velocity;Fast Fluidization;Temperature Effect
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