Critical Impeller Speed for Solid Suspension in Gas Inducing Type Mechanically Agitated Contactors

Canadian Journal of Chemical Engineering

Volumn 75, Issue 4, 1997, Pages 664-676

  Saravanan, K ^a   Patwardhan, A W ^a   Joshi, J B ^a  

^a UNIVERSITY OF MUMBAI   (India)

Author keywords

Critical speed; Gas inducing impeller; Solid suspension; Stirred vessel

Indexed keywords

CHEMICAL EQUIPMENT; CHEMICAL OPERATIONS; FLUIDIZATION;

AGITATION; GAS INDUCING IMPELLER;

SUSPENSIONS (FLUIDS);

GAS-LIQUID-SOLID MIXING; IMPELLER; SUSPENSION;

EID: 0031205911     PISSN: 00084034     EISSN: None     Source Type: Journal    
DOI: 10.1002/cjce.5450750403     Document Type: Article

References (29)

1. Chowdhury, N. H., W. R. Penney, K. J. Myers and J. B. Fasano, "An Experimental Investigation of Solids Suspension at High Solid Loadings in Mechanically Agitated Vessels", AIChE Symp. Ser. 305, 91, 131-138 (1995).
2. Chudacek, M. W., "Formation of Unsuspended Solids Profile in a Slurry Mixing Vessel", in "Proc. 4th Eur. Conf. on Mixing", BHRA, Leeuwenhorst, The Netherlands, 27-29 April (1982), pp. 275-287.
3. Frijlink, J. J., M. Kalijin and J. M. Smith, "Suspension of Solids with Aerated Pitched Blade Turbines", in "Fluid mixing II", The Institution of Chemical Engineers Symposium series no. 89 (1984), pp. 49-58.
4. Frijlink, J. J., A. Bakker and J. M. Smith, "Suspension of Solids Particles with Gassed Impellers", Chem. Eng. Sci. 45, 1703-1718 (1990).
5. Gray, J. B. and J. Y. Oldshue, in "Mixing: Theory and Practice", Vol. III, V. W. Uhl and J. B. Gray, ed., Academic Press Inc., London (1986).
6. Harriot, P., "Mass Transfer to Particles Part 1: Suspended in Agitated Tanks", AIChE J. 8, 93-101 (1962).
7. Joshi, J. B., A. B. Pandit and M. M. Sharma, "Mechanically Agitated Gas-Liquid Reactors", Chem. Eng. Sci. 37, 813-844 (1982).
8. Joshi, J. B., "Solid-Liquid Fluidized Beds: Some Design Aspects", Chem. Eng. Res. Des. 61, 143-161 (1983).
9. Joshi, J. B., V. P. Utgikar, M. M. Sharma and V. A. Juvekar, "Modelling of Three Phase Sparged Reactors", Rev. Chem. Eng. 3, 281-406 (1985).
10. Joshi, J. B., P. V. Shertukde and S. P. Godbole, "Modelling of Three Phase Sparged Catalytic Reactors", Rev. Chem. Eng. 6, 71-155 (1988).
11. Lee, S. L. and F. Durst, "On the motion of Particles in Turbulent Duct Flows", Int. J. Multiphase Flow 8, 125-146 (1982).
12. McCabe, W. L., J. C. Smith and P. Harriot, "Unit Operations of Chemical Engineering", McGraw-Hill, New York (1985), pp. 127-155.
13. Mishra, V. P. and J. B. Joshi, "Flow Generated by a Disc Turbine Part III: Effect of Impeller Diameter, Impeller Location and Comparison with Other Radial Flow Turbines", Chem. Eng. Res. Des. 71, 563-570 (1993).
14. Mishra, V. P., P. Kumar and J. B. Joshi, "LDA measurements of Flow Generated by Multiple Pitched Blade Turbine Impellers", in "Proc. 8th Eur. Conf. on Mixing", (BHRA) Cambridge (1994), pp. 465-468.
15. Molerus, O., "Particle Movement in Pulsating Fluid Streams", Chem-Ing-Tech. 36, 866-870 (1964).
16. Molerus, O. and W. Latzel, "Suspension of Solid Particles in Agitated Vessels - II. Archimedes Numbers > 40, Reliable Prediction of Minimum Stirrer Angular Velocities", Chem. Eng. Sci. 42, 1431-1437 (1987).
17. Mundale, V. D. and J. B. Joshi, "Optimization of Impeller Design for Gas Inducing Type of Mechanically Agitated Contactors", Can. J. Chem. Eng. 73, 161-172 (1995).
18. Oldshue, J. Y., "Suspending Solids and Dispersing Gases in Mixing Vessel", Ind. Eng. Chem. 61, 79-89 (1969).
19. Ranade, V. V. and J. B. Joshi, "Flow Generated by a Pitched Blade Turbine I: Experimental", Chem. Eng. Commun. 81, 197-224 (1989).
20. Ranade, V. V. and J. B. Joshi, "Flow Generated by a Disc TurbineI: Experimental", Chem. Eng. Res. Des. 68, 19-33 (1990).
21. Ranade, V. V., V. P. Mishra, V. S. Saraph, G. B. Deshpande and J. B. Joshi, "Comparison of Axial Flow Impellers Using Laser Doppler Anemomter", Ind. Eng. Chem. Res. 31, 2370-2379 (1992).
22. Raidoo, A. D., K. S. M. S. Ragahava Rao, S. B. Sawant and J. B. Joshi, "Improvements in Gas Inducing Impeller Design", Chem. Eng. Commun. 54, 241-264 (1987).
23. Rewatkar, V. B. and J. B. Joshi, "Effect of Impeller Design on Liquid Phase Mixing in Mechanically Agitated Reactors", Chem. Eng. Commun. 102, 1-33 (1991a).
24. Rewatkar, V. B., K. S. M. S. Raghava Rao and J. B. Joshi, "Critical Impeller Speed for Solid Suspension in Mechanically Agitated Three-Phase Reactors - 1 : Experimental Part", Ind. Eng. Chem. Res. 30, 1770-1784 (1991b).
25. Rieger, F., and P. Ditl., "Suspension of Solid Particles", Chem. Eng. Sci., 49, 2219-2227 (1994).
26. Saravanan, K., V. D. Mundale and J. B. Joshi, "Gas Inducing Type Mechanically Agitated Contactors", Ind. Eng. Chem. Res. 33, 2226-2241 (1994).
27. Saravanan, K. and J. B. Josbi, "Gas Inducing Type Mechanically Agitated Contactors: Hydrodynamic Characteristics of Dual impeller System", Ind. Eng. Chem. Res. 34, 2499-2514 (1995).
28. Wichterle, K., "Conditions for Suspension of Solids in Agitated Vessels", Chem. Eng. Sci. 43, 467-471 (1988).
29. Zwietering, Th.N., "Suspending of Solid Particles in Liquid by Agitators", Chem. Eng. Sci. 8, 244-253 (1958).