Results 91 to 100 of about 392 (137)
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Flow regimes in a spout–fluid bed: A combined experimental and simulation study
Chemical Engineering Science, 2005Spout–fluid beds find a widespread application in the process industry for efficient contacting of large particles with a gas. However, detailed understanding of the complex behavior of these systems is lacking, which leads to significant scale-up problems in industry.
Niels G Deen
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Flow pattern and transition of rectangular spout–fluid bed
Chemical Engineering and Processing: Process Intensification, 2006Abstract Experimental study on the flow patterns and transitions in a rectangular spout–fluid bed (cross-section of 300 mm × 30 mm and height of 2000 mm) packed with Geldart group D particles was carried out. Six distinct flow patterns, i.e. internal jet, spouting, fluidizing, jet in fluidized bed with bubbling, jet in fluidized bed with slugging and
Wenqi Zhong +2 more
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Solids circulation in a spout‐fluid bed with draft tibe
Canadian Journal of Chemical Engineering, 1988AbstractA 20 cm diameter semi‐cylindrical spout‐fluid bed with a draft tube has been used to study the effects of operating and geometric parameters on the solids circulation rates at ambient temperature. A new technique has been developed for measuring the solids fluxes with great accuracy.
Franco Berruti, Leo A Behie
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Minimum spouting velocity in a spout‐fluid bed with a draft tube
Canadian Journal of Chemical Engineering, 2009AbstractMinimum spouting velocity was measured in a 0.12 m cylindrical spout‐fluid bed with a draft tube. The effects of fluidizing gas flow rate, entrainment height, and spout nozzle diameter on minimum spouting velocity were discussed. A correlation on minimum spouting velocity has been proposed based on the present experimental data.
Weisheng Wei, Xiaojun Bao
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The mechanics of spout‐fluid beds at the minimum spout‐fluid flowrate
The Canadian Journal of Chemical Engineering, 1983AbstractEquations for predicting the minimum fluid flowrate in spout‐fluid beds of coarse spherical particles are developed and experimentally verified. Correlations for the spout diameter and maximum spoutable height are also given. The annular pressure drop equations developed in previous work are experimentally verified.
Dž. E. Hadžisdmajlović +3 more
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Hydrodynamics of spout fluid beds
2010Experiments were conducted in a spout-fluid bed, a modified version of a standard spouted bed, incorporating auxiliary flow in addition to central flow. The auxiliary flow was supplied in three different ways through the perforated conical distributor base. The vessel used was a cylindrical half column, 0.15 m in diameter and 1.05 m high fitted with an
Wenqi Zhong +3 more
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Prediction of the maximum spoutable bed height in spout‐fluid beds
The Canadian Journal of Chemical Engineering, 1991AbstractA model for predicting the ratio of the maximum spoutable bed height in a spout‐fluid bed to the maximum spoutable bed height in a spouted bed is presented and experimentally verified. The model is a further extension of the basic Mamuro and Hattori force balance model.
Ž. B. Grbavčić +4 more
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Pressure distribution in spout‐fluid bed reactors
The Canadian Journal of Chemical Engineering, 1983AbstractThe occurrence of several flow regimes in spout‐fluid beds was investigated. Four different flow regimes, viz. a packed bed flow regime, a bubbling and a fluctuating spouted bed flow regime and a stable spouted bed flow regime, were found to exist.
Heil, C., Tels, M.
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Flow regimes for spout‐fluid beds
The Canadian Journal of Chemical Engineering, 1984On a fait varier les debits d'air et d'eau, dans le cœur et dans l'anneau, de zero jusqu'a la vitesse de transport des particules spheriques de carbonate de calcium de 1,8 mm de diametre. On a identifie trois regimes d'ecoulement, et on a determine les criteres servant a specifier chaque ...
D. V. Vuković +4 more
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Voidage and particle velocity profiles in a spout‐fluid bed
The Canadian Journal of Chemical Engineering, 2000AbstractDetailed hydodynamic measurements have been obtained for fully cylindrical spout‐fluid beds of 1.3 mm, 1.8 mm and 2.5 mm glass beads in a fully cylindrical column of diameter 152 mm using three different types of optical fibre probes. The reallocation of up to 43% of the air to auxiliary air introduced through the conical base caused some ...
Freitas, Lap +4 more
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