Layer Inversion and Bed Contraction in Down-Flow Binary-Solid Liquid-Fluidized Beds

Autor: R. Escudié, Norman Epstein, H.T. Bi, John R. Grace
Rok vydání: 2008
Předmět:
Zdroj: The Canadian Journal of Chemical Engineering. 85:25-35
ISSN: 1939-019X
0008-4034
DOI: 10.1002/cjce.5450850102
Popis: Experiments were carried out on downward-flow water-fluidized binary mixture of spheres selected for possible layer inversion. With the two binaries tested (relatively high-density large particles mixed with lower-density smaller particles), only one of the five possible steps of the layer inversion progression was clearly identified for the higher liquid velocities, a mixed layer being observed at the top of the column close to the distributor. This layer manifested a bed contraction so large that its bulk density was lower than those of its constituent mono-components at the same liquid velocity, which determined its location within the column. The voidage of the mixed layer could be predicted with good accuracy (
Databáze: OpenAIRE
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