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Maximum Semi-fluidization Velocity of Gas-liquid-solid Semi-fluidized Beds


Affiliations
1 Department, National Institute of Technology, Raipur -492001, India
2 Department, National Institute of Technology, Raipur-492001, India
3 Department, Raipur Institute of Technology, Raipur -492001, India
     

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Semi-fluidized beds are found to have wide applications in process industries. In the present study hydrodynamic viz., maximum semi-fluidization velocity of gas-liquid-solid semi-fluidized bed has been studied. The necessity of generalized correlation for the prediction of maximum semi-fluidization is emphasized. Experiments have been conducted in a 100 mm ID, 1.8m height vertical Plexiglas column using air, water and solid (of different densities) in order to develop a good understanding of each flow regime in gas-liquid-solid semi-fluidization. It is found that maximum semi-fluidization velocity is strong function of superficial gas velocity, particle size, particle density and bed expansion ratio. Values of the maximum semi-fluidization velocity, obtained from experimental investigations have been compared with calculated values.

Keywords

Gas-liquid-solid semi-fluidization, Maximum Semi-fluidization Velocity, Correlation, Expansion Ratio, Particle Size.
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  • Maximum Semi-fluidization Velocity of Gas-liquid-solid Semi-fluidized Beds

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Authors

Pooja V. Shrivastava
Department, National Institute of Technology, Raipur -492001, India
A. B. Soni
Department, National Institute of Technology, Raipur-492001, India
H. Kumar
Department, Raipur Institute of Technology, Raipur -492001, India

Abstract


Semi-fluidized beds are found to have wide applications in process industries. In the present study hydrodynamic viz., maximum semi-fluidization velocity of gas-liquid-solid semi-fluidized bed has been studied. The necessity of generalized correlation for the prediction of maximum semi-fluidization is emphasized. Experiments have been conducted in a 100 mm ID, 1.8m height vertical Plexiglas column using air, water and solid (of different densities) in order to develop a good understanding of each flow regime in gas-liquid-solid semi-fluidization. It is found that maximum semi-fluidization velocity is strong function of superficial gas velocity, particle size, particle density and bed expansion ratio. Values of the maximum semi-fluidization velocity, obtained from experimental investigations have been compared with calculated values.

Keywords


Gas-liquid-solid semi-fluidization, Maximum Semi-fluidization Velocity, Correlation, Expansion Ratio, Particle Size.

References