MIXING OF PARTICLES IN A CIRCULATING
FLUIDIZED BED

Yu. S. Teplitskii and E. F. Nogotov

UDC 533.6

A phenomenological model of longitudinal mixing of particles 
in a circulating fluidized bed is formulated. The model allows for 
the main features of the process: ascending motion of particles in 
the core of the bed and their descending motion in the annular zone 
(internal circulation of the solid phase); considerable changes in 
the concentration of particles and in the values of the ascending 
and descending zones over the bed height; external circulation of 
the solid phase and the effect of the near-bottom fluidized bed on 
the process as a whole. The validity of the initial proposition is 
confirmed by comparison of calculated and experimental curves of mixing.

A. V. Luikov Heat and Mass Transfer Institute, National Academy 
of Sciences of Belarus, Minsk, Belarus; email: dsl@hmti.ac.by. 
Translated from Inzhenerho-Fizicheskii Zhurnal, Vol. 75, No. 3, pp. 
9-16, May-June, 2002. Original article submitted July 6, 2001.

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