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.
Horio M, Nishimuro M, Ishii H, Proc. of the 3rd SCEJ Symp. on Circulating Fluidized Beds, 54, 1989
Bi HT, Jiang PJ, Fan LS, AIChE Meeting, Paper no. 101d, Los Angeles, 1991
Jiang PJ, Fan LS, AIChE Meeting, Paper#101e, Los Angeles, CA, 1991
Horio M, Ishii H, Nishimuro M, Powder Technol., 70, 229, 1992
Adanez J, de Diego LF, Gayan P, Powder Technol., 77, 61, 1993
Tsukada M, Nakanishi D, Horio M, 4th Int. Conf. on Circulating Fluidized Beds Preprint volume, 248, 1993
Chen B, Li Y, Wang F, Wang S, Kwauk M, Chem. Mater-lurgy, 4, 20, 1980
Li Y, Kwauk M, "Fluidization," edited by Grace, JR and Matsen, JM, Plenum Press, New York, 537, 1980
Kwauk M, Wang N, Li Y, Chen B, Shen Z, "Circulating Fluidized Bed Technology," edited by Basu, P., Pergamon Press, Toronto, 33, 1985
Perales JF, Coll T, Llop MF, Puigjaner L, Arnaldos J, Cassal J, "Circulating Fluidized Bed Technology III," edited by Basu, P., Horio, M. and Hasatani, M., Pergamon Press, New York, 73, 1990
Yi CK, Son JE, Jin GT, Shun DW, Park JH, Han KH, Jo SH, Lee SY, "Solid Circulation Technology for the Stable Operation of a Hot Gas Desulfurization Bench-Scale Unit," Research Report, KIER994613, 17, 1999
Lee GS, Kim SD, Powder Technol., 62, 207, 1990
Bi HT, Fan LS, AIChE J., 38(2), 297, 1992
Choi JH, Son JE, Kim SD, J. Chem. Eng. Jpn., 22, 597, 1989
Son JE, Choi JH, Kim SD, "Fluidization VI," edited by Grace JR, Shemilt LW and Bergougnou MA Engineering Foundation, 113, 1989
Lee JK, Hu CG, Shin YS, Chun HS, Can. J. Chem. Eng., 68, 824, 1990
Park SS, Choi YT, Lee GS, Kim SD, "Circulating Fluidized Bed Technology," edited by Basu, P., Horio M and Hasatani M, Pergamon Press, Oxford, 497, 1990
Lee WJ, Cho YJ, Kim JR, Kim SD, Proc. 3rd Asian Conf. on Fluidized-Bed and Three-Phase Reactors, 126, 1992
Wen CY, Chen LH, Proc. 6th Int. Conf. on FBC, III, 1115, 1980
Romanova TT, Deposited Doc., Viniti 5129-80, 1980
Milne BJ, Berruti F, Behie LA, Theo JW, Proc. 4th Int. Conf. on CFB, 29, 1993
Zhang X, Cao Y, Ren Y, Chen J, Hong Y, Proc. 8th Int. Conf. on FBC, I, 75, 1985
George SE, Grace JR, Can. J. Chem. Eng., 59, 279, 1981