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The movement of solids through flighted rotating drums. Part i: Model formulation
Author(s) -
Sherritt Richard G.,
Caple Rod,
Behie Leo A.,
Mehrotra Anil K.
Publication year - 1993
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450710302
Subject(s) - drum , pellets , combustion , fluidized bed , mineralogy , materials science , physics , mechanical engineering , mechanics , engineering , chemistry , thermodynamics , composite material , organic chemistry
A rotating drum with lifting flights is an important piece of industrial equipment used to contact granular solids with a gas stream. Applications include the drying of materials such as wood chips, coal, grain, and metallurgical ores, the cooling of fertilizer pellets and more recently the combustion of coked oil sand. A new mathematical model for a rotating drum with lifting flights that predicts the residence time of particles is proposed. Particle motion is considered in both the airborne phase and the dense phase. Moreover, the holdup and the axial flow rate of particles in the two phases are determined separately. Overall, the model is more flexible than previous models. The drum may be inclined or horizontal with cocurrent or countercurrent flow, may have any type of lifting flights and may be underloaded or overloaded.