ISSN Online: 2377-424X
International Heat Transfer Conference 3
PECULIARITIES OF TRANSFER PROCESSES IN FLUIDIZED BED
要約
Well known conclusions or the general
hydrodynamic theory,heat- and mass transfer
are widely used in the description of
fluidized processes. The authors critically
apply these conclusions to the processes
of heat-,mass and momentum exchange in
fluidized beds and especially to the correlation
of experimental data. Here new
principles of analyzing the momentum and
heat exchange processes between the gas
flow and solid particles in fluidized bed
are derived: the "external" problem of hydrodynamics
is applied;the behaviour of a
solid phase is investigated (peculiarities
of polydispersed bed and the motion of
particles in the bed; the use of a heat
transfer coefficient and the Nusselt number
in the investigation of heat exchange
between the gas and fluidized bed criticized
while the use of dimensioless temperature
is suggested; the analysis of the
heat treatment process of solid particles
is conducted in Lagrange variables.