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Minimum fluidization velocities of fluidized-bed coal-combustion solids
Powder Technology, 1991Abstract The minimum fluidization velocities of coal, char, limestone, lime and partially sulphated lime under typical AFBC conditions and at room temperature have been determined experimentally. On fitting the experimental data to a Wen and Yu type equation, the two fitted parameters are found to be highly sensitive to the fitting method used to ...
J. Adánez, J.C. Abanades
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Minimum fluidization velocities of wet coal particles
Industrial & Engineering Chemistry Research, 1988Minimum fluidization velocities of wet lignite coal beds were measured. The experiments were carried out in an 8.5 x 10/sup -2/ m i.d. column with particles of average size ranging from 0.15 x 10/sup -3/ to 4.25 x 10/sup -3/m, using air as a fluidizing gas. The experimental results were compared to the values predicted by commonly used correlations. On
Jaroslav Pata +3 more
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Effect of operating temperature on minimum fluidization velocity
Powder Technology, 1991We present experimental and literature data on the minimum fluidization velocity for operation at temperatures above ambient values. By regression analysis on the combined and transformed data, a new empirical correlation was developed. We investigate the effect of temperature on the minimum fluidization velocity of beds of different materials, such as
S.Y. Wu, J. Baeyens
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Minimum fluidization velocities in beds of mixed solids
The Canadian Journal of Chemical Engineering, 1978AbstractThe fluidization behaviour of a bed of solids of mixed sizes and/or densities indicates that for a range of velocities between ubf (the velocity of beginning of fluidization) and utf (the velocity of complete fluidization), such a bed is only partially fluidized.
R.P. Vaid, P. Sen Gupta
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Improved equation for the calculation of minimum fluidization velocity
Industrial & Engineering Chemistry Process Design and Development, 1986Classement des particules solides en trois categories selon leur forme, et determination pour chaque categorie des valeurs optimales des constantes figurant dans les equations de calcul de la vitesse minimale.
Antoni Lucas +3 more
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Minimum fluidization velocities of mixtures of biomass and sands
Energy, 2001Abstract The present work reports studies on the fluidization of mixtures of biomass and sands. The biomass materials used are rice husk, sawdust and groundnut shell powder, and the sands employed are of two different densities and particle sizes.
T R. Rao, J.V Ram. Bheemarasetti
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Minimum fluidization velocity at elevated temperatures and pressures
The Canadian Journal of Chemical Engineering, 1986AbstractA procedure based on the Ergun equation to predict the minimum fluidization velocity at elevated temperatures and pressures and for different gaseous fluidizing agents has been discussed and shown to be applicable for practical purposes.
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Prediction of Minimum Fluidization Velocity in Three-Phase Fluidized-Bed Reactors
Industrial & Engineering Chemistry Research, 1999Knowledge of the onset of fluidization is of considerable relevance and the key to three-phase fluidized-bed reactors design and safe operation. Accordingly, using a wide historic ULmf database set up from the open literature, all the quantification methods proposed to predict the minimum fluidization liquid velocity in three-phase fluidized beds have ...
Faïçal Larachi +3 more
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Minimum liquid fluidization velocity in gas‐liquid‐solid fluidized beds
AIChE Journal, 1997AbstractAccurate detection of minimum liquid fluidization is essential to the successful operation of gas‐liquid‐solid fluidized beds, especially when particle or liquid properties evolve. A gas‐liqid‐solid system of 3‐mm glass beads exhibits three distinct flow regimes as the liquid velocity is increased: compacted, agitated and fluidized‐bed regmes ...
L. A. Briens +3 more
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Prediction of minimum fluidization velocity for fine tailings materials
Powder Technology, 2009The suitability of several minimum fluidization velocity correlations has been investigated for fine zinc slime, iron ore tailings, both pre and post hydro-cyclone uranium tailings, and a relatively coarse grade of fly ash. It has been found that most of the published correlations significantly underestimate the value of minimum fluidization velocity ...
S.K. Gupta +6 more
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