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Received April 30, 2014
Accepted July 22, 2014
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Solids circulation rate and static bed height in a riser of a circulating fluidized bed
Daebum Cho
Jeong-Hoo Choi1†
Muhammad Shahzad Khurram1
Sung-Ho Jo2
Ho-Jung Ryu2
Young Cheol Park2
Chang-Keun Yi2
Ansan Technical High School, 51 Ansangonggo-ro, Sangnok-gu, Ansan-si, Gyeonggy 426-829, Korea 1Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea 2Korea Institute of Energy Research, 71-2, Jang-dong, Yuseong-gu, Daejeon 305-343, Korea
choijhoo@konkuk.ac.kr
Korean Journal of Chemical Engineering, February 2015, 32(2), 284-291(8), 10.1007/s11814-014-0209-x
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Abstract
Solids circulation rate and static bed height in the riser of a circulating fluidized bed (CFB) process, which consisted of a riser and two bubbling-beds, were investigated and discussed at ambient temperature and pressure. Three kinds of powder (FCC catalyst, glass bead, plastic powder) were used as bed materials. The static bed height in the riser increased with the solids circulation rate. However, it decreased with an increase of gas velocity. The effect of gas velocity diminished as the gas velocity increased. The riser static bed height could be used to estimate the solids circulation rate in reasonable accuracy. A correlation on static bed height in the riser, relating to the solids circulation rate, was proposed for the present experimental ranges.
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References
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de Martin L, van Ommen JR, Chem. Eng. J., 204, 125 (2012)
Bai D, Kato K, Powder Technol., 101(3), 183 (1999)
CHOI JH, YI CK, SON JE, Korean J. Chem. Eng., 7(4), 306 (1990)
Kato K, Shibasaki H, Tamura K, Arita S, Wang C, Takarada T, J. Chem. Eng. Jpn., 22, 130 (1989)
Rao VVB, Saha RK, Gupta PS, Indian Chemical Engineer, Section A, J. of Indian Institute of Chemical Engineers, 38, 91 (1996)
Lei HW, Horio M, J. Chem. Eng. Jpn., 31(1), 83 (1998)
Li Y, Kwauk M, in Fluidization, Grace JR, Matsen JM Eds., Plenum Press, New York (1980)
Knowlton TM, in Circulating fluidized beds, Grace JR, Avidan AA, Knowlton TM Eds., Blackie Academic & Professional, Chapman & Hall, New York (1997)
Kunii D, Levenspiel O, Fluidization engineering, 2nd Ed., Butterworth-Heinemann, Boston (1991)
Chan CW, Seville JPK, Parker DJ, Baeyens J, Powder Technol., 203(2), 187 (2010)
Bi HT, Grace JR, Int. J. Multiph. Flow, 21(6), 1229 (1995)
Geldart D, Powder Technol., 7, 285 (1973)
Arena U, Cammarota A, Pistone L, in Circulating fluidized bed technology, Basu P Eds., Pergamon Press, New York (1985)
Louge M, Chang H, Powder Technol., 60, 197 (1990)
Brereton CMH, Grace JR, in Circulating fluidized bed technology IV, Avidan AA Eds., AIChE (1994)
