Axial solids mixing in a circulating fluidized bed

Solids mixing in a circulating fluidized bed

“…As is shown in [2], this model is able to adequately describe the experimental curves of mixing obtained for both the core zone and the annular zone.…”

“…The possibility of this is discussed in [2]. (8) The coefficient of radial dispersion of particles in both zones is the same.…”

“…In [2], it is assumed on the basis of experimental data that n = 3 and the quantities A and B are found from (12) and (13) as functions of x. In the present work, for the convenience of numerical calculations, these values are quantities to be constant and equal to: A = 0.85, B = 0.15, and the quantity n is determined as…”

“…The value of this uncertainty can be found from the condition of physical correspondence of models (1), (2) and (31), (32) for b * ! 1 and D r !…”

“…The first one includes the models of axial (longitudinal) mixing in which the determining quantities and concentrations are considered as depending on just the longitudinal coordinate. In [2], the critical analysis of such models is carried out and on the basis of it a rather simple two-zone model of axial solids mixing is offered which includes the equations:…”