Critical impeller speed for suspending solids in aerated agitation tanks

Canadian Journal of Chemical Engineering

Volumn 80, Issue 4, 2002, Pages 1-6

  Zhu, Yonggang ^a   Wu, Jie ^a  

^a CSIRO   (Australia)

Author keywords

Just suspension speed; Solids suspension; Three phase systems

Indexed keywords

CONCENTRATION (PROCESS); FLOW OF FLUIDS; IMPELLERS; SIZE DETERMINATION; SUSPENSIONS (FLUIDS);

AERATED AGITATION TANKS; GAS SPARGING; GAS-LIQUID-SOLIDS SYSTEMS; SUSPENDING SOLIDS;

TANKS (CONTAINERS);

AERATION; AGITATION; IMPELLER; LIQUID-SOLID MIXING; STIRRED TANK; SUSPENDED LOAD;

AERATION; AGITATION; ARTICLE; GAS; IMPELLER; LABORATORY; LIQUID; MATHEMATICAL ANALYSIS; PARTICLE SIZE; RATING SCALE; SOLID; STIRRED REACTOR; SUSPENSION; TANK; VELOCITY;

EID: 2942625629     PISSN: 00084034     EISSN: None     Source Type: Journal    
DOI: 10.1002/cjce.5450800417     Document Type: Article

References (20)

1. th European Conf. on Mixing", Pavia, Italy, May (1988), pp. 389-398.
2. Buurman, C., G. Resoort and A. Plaschkes, "Scaling-up Rules for Solids Suspension in Stirred Vessels", Chem. Eng. Sci. 41, 2865-2871 (1986).
3. Chapman, C.M., A.W. Nienow, M. Cooke and I.C. Middleton, "Particle-Gas-Liquid Mixing in Stirred Vessels", Parts I-IV, Chem. Eng. Res. Des. 61, 71-81 (1983).
4. th European Conf. on Mixing), (1994), pp. 41-48.
5. Dutta, N.N. and V.G. Pangarkar, "Critical Impeller Speed for Solid Suspension in Multi-Impeller Three Phase Agitated Contactors", Can. J. Chem. Eng. 73, 273-283 (1995).
6. Frijlink, J.J., A. Bakker and J.M. Smith, "Suspension of Solid Particles with Gassed Impellers", Chem. Eng. Sci. 45, 1703-1718 (1990).
7. Hicks, M.T., K.J. Myers and A. Bakker, "Cloud Height in Solids Suspension Agitation", Chem. Eng. Comm. 160, 137-155 (1997).
8. Ibrahim, S. and A.W. Nienow, "Particle Suspension in Turbulent Regime: The Effect of Impeller Type and Impeller/Vessel Configuration", Trans IChemE 74(A), 679-688 (1996).
9. Lehn, M.C., K.J. Myers and A. Bakker, "Agitator Design for Solids Suspension under Gassed Conditions", Can. J. Chem. Eng. 77, 1065-1071 (1999).
10. Myers, K.J. and A. Bakker, "Solids Suspension with Up-pumping Pitched-blade and High-efficiency Impellers", Can. J. Chem. Eng. 76, 4233-440 (1998).
11. nd ed, N. Harnby, M.F. Edwards and A.W. Nienow, Eds., Butterworths, London, UK (1992), pp. 364-393.
12. th European Conf. on Mixing", Wurzburg, West Germany, June (1985), pp. 1-13.
13. Pantula, P.R.K. and N. Ahmed, "The Impeller Speed Required for Complete Solids Suspension in Aerated Vessels: A Simple Correlation?", in "Récents progres en genie des procédés (Mixing IX)", Paris, France (1997), pp. 11-18.
14. Pantula, P.R.K. and N. Ahmed, "Solids Suspension and Gas Holdup in Three Phase Mechanically Agitated Reactors", in "Chemeca '98", Port Douglas, Queensland, Australia, (1998), Paper No. 132.
15. Raghava Rao, K.S.M.S., V.B. Rewatkar and J.B. Joshi, "Critical Impeller Speed for Solid Suspension in Mechanically Agitated Contactors", AIChE J. 34, 1332-1340 (1988).
16. Rewatkar, V.B., K.S.M.S. Raghava Rao and J.B. Joshi, "Critical Speed for Solid Suspension in Mechanically Agitated Three-Phase Reactors: 1. Experimental Part", Ind. Eng. Chem. Res. 30, 1770-1784 (1991).
17. Wong, C.W., J.P. Wang and S.T. Huang, "Investigations of Fluid Dynamics in Mechanically Stirred Aerated Slurry Reactors", Can. J. Chem. Eng. 65, 412-419 (1987).
18. Wu, J., Y. Zhu, P.C. Bandopadhayay, L. Pullum and I.C. Shepherd, "Solids Suspension with Axial Flow Impellers", AIChE J. 46, 647-650 (2000).
19. Wu, J., Y. Zhu and L. Pullum, "The Effect of Impeller Pumping and Fluid Rheology on Solids Suspension in a Stirred Vessel", Can. J. Chem. Eng. 79, 177-186 (2001).
20. Zwietering, Th.N., "Suspending of Solid Particles in Liquid by Agitators", Chem. Eng. Sci. 8, 244-253 (1958).