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S10 Fluidodinâmica de Escoamento Multifásico |
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Title:
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PRESSURE DROP BEHAVIOR INSIDE AN ATMOSPHERIC FLUIDIZED BED, FROM MINIMUM TO INCIPIENT FAST FLUIDIZATION, USING DIFFERENT DISTRIBUTOR PLATES
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Summary :
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EXPERIMENTS WERE PERFORMED TO STUDY THE PRESSURE DROP BEHAVIOR INSIDE AN ATMOSPHERIC VERTICAL FLUIDIZED BED WITH 100 MM INTERNAL DIAMETER, DIVIDED INTO 5 SECTIONS OF 50 MM HIGH EACH. THE FLUIDIZED BED UNDER ANALYSIS IS ESTABLISHED BY FLUIDIZING TWO SIZE RANGES OF SILICA BALLOTINIS, 355-425 AND 600-710 M, USING THREE DISTRIBUTORS TYPES: PERSPEX, METALLIC MESH AND CERAMICS. THE CLASSICAL FORCE BALANCE EQUATIONS WERE MODIFIED TO ACCOUNT NOT ONLY FOR THE WEIGHT AND BUOYANCY BUT ALSO FOR THE PRESENCE OF BUBBLES AND DRAG ON CLUSTERS OF PARTICLES. DIFFERENT DENSE PHASE VOIDAGES, AS WELL AS DIFFERENT RATIOS OF VOLUMETRIC FLOW RATE THROUGH THE BUBBLE PHASE VERSUS VOLUMETRIC FLOW RATE THROUGH AN EQUIVALENT DENSE PHASE SECTION WERE CONSIDERED. FINALLY, A MODEL IS PRESENTED COVERING A RANGE OF FLUIDIZATION REGIMES FOR SEVERAL SLICES INSIDE THE FLUIDIZED BED, FROM MINIMUM FLUIDIZATION TO INCIPIENT FAST FLUIDIZATION.
FLUIDIZATION, FLUIDIZED BED, PRESSURE DROP.
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Author :
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Figueiredo, Rui Almeida
Paiva, João Monney
Pinho, Carlos Tavares
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Paper View :
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COBEM99
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