Calculation of the height of the separation zone of a polydisperse fluidized bed

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

“…For excluding entrainment of large fractions, the height of freeboard (separation) space must be larger than the height of splash zone, which contains particles thrown out during collapses of bub bles and which is characterized by a rapid decrease of solid phase concentration along the height [13]. The height of freeboard space can be estimated using the procedure described in [19].…”