Effect of Impeller Shape on Solid Particle Suspension

Open access

Abstract

This paper deals with the effect of impeller shape on off-bottom particle suspension. On the basis of numerous suspension measurements, correlations are proposed for calculating the just-suspended impeller speed for a standard pitched four-blade turbine and three types of hydrofoil impellers produced by TECHMIX for several particle sizes and for a wide range of particle concentrations. The suspension efficiency of the tested impellers is compared with the efficiency of a standard pitched blade turbine on the basis of the power consumption required for off-bottom suspension of solid particles. It is shown that the standard pitched blade turbine needs highest power consumption, i.e. it exhibits less efficiency for particle suspension than hydrofoil impellers produced by TECHMIX.

References
  • Ceres D., Jirout T., Rieger F., Seichter P., 2008. Effect of impeller blade shape on particle suspension. Czasopismo Techniczne. Mechanika, 2-M, 105, 57-65 (in Russian).

  • Ceres D., 2010. Mixing of suspensions. Ph.D. Disertation. Czech Technical University in Prague (in Czech).

  • Ditl P., Rieger F., 2006. Designing suspension-mixing systems. CEP, 102, 22-30.

  • Fořt I., Kysela B., Jirout T., 2010. Flow characteristics of axial high speed impellers. Chem. Process Eng., 31, 661-679.

  • Kassat G.R., Pandit A.B., 2005. Review on mixing characteristics in solid-liquid and solid-liquid-gas reactor vessels. Can. J. Chem. Eng., 83, 618-643. DOI: 10.1002/cjce.5450830403.

  • Einenkel W.D., 1980. Influence of physical properties and equipment design on the homogeneity of suspensions in agitated vessels. Ger. Chem. Eng., 3, 118-124.

  • Rieger F., Sinevič V., 1980. Suspension of solid particles. Colect. Czech. Chem. Commun., 95, 966-968.

  • Jirout T., Rieger F., 2009. Scale-up of mixing equipment for suspensions. Chem. Process Eng., 30, 359-367 Jirout T., Moravec J., Rieger F., Sinevič V., Špidla M., Sobolík V., Tihon J., 2005. Electrochemical measurement of impeller speed for off-bottom suspension. Chem. Process Eng., 26, 485-497.

  • Jirout T., Rieger F., 2011. Impeller design for mixing of suspensions. Chem. Eng. Res. Des., 89, 1144-1151. DOI: 10.1016/j.cherd.2010.12.005.

  • Rieger F., 1993. Efficiency of agitators while mixing of suspensions. 6th Polish Seminar on Mixing, Kraków, Zakopane, 79-85.

  • Rieger F., 2000. Effect of particle content on agitator speed for off-bottom suspension. Chem. Eng. J., 79, 171-175. DOI: 10.1016/S1385-8947(00)00171-6.

  • Rieger F., Ditl P., 1994. Suspension of solid particles. Chem. Eng. Sci., 49, 2219-2227. DOI: 10.1016/0009-2509(94)E0029-P.

  • Zwietering Th.N., 1958. Suspending of solid particles in liquid by agitators. Chem. Eng. Sci., 8, 244-253. DOI: 10.1016/0009-2509(58)85031-9.

Chemical and Process Engineering

The Journal of Committee of Chemical and Process of Polish Academy of Sciences

Journal Information


IMPACT FACTOR 2016: 0.971

CiteScore 2016: 1.03

SCImago Journal Rank (SJR) 2016: 0.395
Source Normalized Impact per Paper (SNIP) 2016: 0.873

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 40 40 29
PDF Downloads 11 11 5