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Experimental characterization of the flow pattern in an annular fluidized bed
Author(s) -
Collin Anne,
Wirth KarlErnst,
Ströder Michael
Publication year - 2008
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20056
Subject(s) - pressure drop , nozzle , mechanics , fluidized bed , bubble , mass transfer , heat transfer , materials science , jet (fluid) , flow (mathematics) , residence time (fluid dynamics) , chemistry , analytical chemistry (journal) , thermodynamics , chromatography , geology , geotechnical engineering , physics
The annular fluidized bed combines a long solids residence time and a good heat and mass transfer. To experimentally characterize the flow pattern in the system, pressure drop and capacitance probe measurements have been carried out under ambient conditions in two plants of inner diameters of 0.19 and 0.74 m. Depending on the interaction between gas velocity in the central jet and ratio of bubble to central nozzle diameter, the ratio of internal to external solids circulation can be regulated.