Characteristic features of transfer processes in polydisperse beds on full and partial fluidization

Conditions for efficient combustion of solid fuel in fluidized-bed furnaces

“…2. The higher the gas velocity, the larger the limit ing sizes of fluidized particles d t1 (the terminal diame ter) and d mf (the minimum fluidization diameter) and the higher the degree of bed polydispersity [17], due to which it becomes possible to do without fuel prepara tion. An important thing is that the use of granular material having a wide fractional composition makes it possible to obtain more uniform dispersed medium, smaller breakthrough of fluidizing gas, and better mix ing of this gas [13].…”

“…A general description of this model is given in [24]. The bed hydrodynamics and transfer coefficients were determined using the procedure described in [17,25], and the parameters of dispersed medium were determined in accordance with [16].…”