HYDRODYNAMICS OF NEARLY FLAT BASE SPOUTED BEDS

The hydrodynamic behaviour of a nearly flat base spouted bed (angle 15 0-degrees) was studied in a pilot plant unit, using solids of differen t densities and particle diameters and with different values of the co ntactor inlet diameter. It was determined that the equation of Mathur and Gishler with an exponent of 0.10 for the (D0/D(c)) modulus is suit able for calculation of the minimum spouting velocity. Original correl ations for prediction of the maximum pressure drop, of the pressure dr op for stable operation and of bed voidage in the bed expansion are pr oposed. It is proved that the maximum spoutable bed height can be calc ulated using the equation proposed by Morgan et al. for conventional s pouted beds. For small particle diameters the equation of Malek arid L u is also valid.