Correlations for critical fluidization velocity and maximum bed pressure drop for heterogeneous binary mixture of irregular particles in gas–solid tapered fluidized beds |
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| Authors: | DC Sau S Mohanty KC Biswal |
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| Affiliation: | aDepartment of Chemical Engineering, Indira Gandhi Institute of Technology, Sarang 759146, India;bInstitute of Minerals & Materials Technology, Bhubaneswar 751013, India;cDepartment of Chemical Engineering, National Institute of Technology, Rourkela 769008, India |
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| Abstract: | The tapered fluidized bed is a remedial measure for certain drawbacks of the gas–solid system, by the fact that a velocity gradient exists along the axial direction of the bed with increase in cross-sectional area. To study the dynamic characteristics of heterogeneous binary mixture of irregular particles, several experiments have been carried out with varying tapered angles and composition of the mixtures with various particles. The tapered angle of the bed has been found to affect the characteristics of the bed. Models based on dimensional analysis have been proposed to predict the critical fluidization velocity and maximum bed pressure drop for gas–solid tapered fluidized beds. Experimental values of critical fluidization velocity and maximum bed pressure drop compare well with that predicted by the proposed models and the average absolute errors are well within 15%. |
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| Keywords: | Gas– solid fluidization Critical fluidization velocity Maximum bed pressure drop Tapered fluidized bed Heterogeneous binary mixture |
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