LIQUID FLUIDIZATION OF PARTICLES IN PACKED-BEDS

The expansion behavior of solid particles fluidized by liquid within f ixed packings was studied by the conductimetric method. The electrodes conforming the conductivity cell were embedded in the container walls with their center at half the height of the fluidized bed. The axial solids distribution was also measured by this technique by placing ten conductivity cells along the column. The study is limited to intermed iate and turbulent flow regimes, due to the density and size of the pa rticles used. Depending on the geometry of the packed bed, the operati ng range in terms of superficial velocity and the homogeneity of the f luidized bed differ from those obtained for fluidization in an empty c olumn. Taking into account geometric aspects of the systems, a method of estimating the fluidization parameters is derived.