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Number of results
2013 | 34 | 4 | 427-434

Article title

BLENDING CHARACTERISTICS OF HIGH-SPEED ROTARY IMPELLERS

Content

Title variants

Languages of publication

EN

Abstracts

EN
This paper presents a comparison of the blending efficiency of eight high-speed rotary impellers in a fully baffled cylindrical vessel under the turbulent flow regime of agitated charge. Results of carried out experiments (blending time and impeller power input) confirm that the down pumping axial flow impellers exhibit better blending efficiency than the high-speed rotary impellers with prevailing radial discharge flow. It follows from presented results that, especially for large scale industrial realisations, the axial flow impellers with profiled blades bring maximum energy savings in comparison with the standard impellers with inclined flat blades (pitched blade impellers).

Publisher

Year

Volume

34

Issue

4

Pages

427-434

Physical description

Dates

published
1 - 12 - 2013
online
22 - 01 - 2014

Contributors

author
  • Department of Process Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, Czech Republic
  • TECHMIX, Ltd., Brno, Czech Republic
author
  • TECHMIX, Ltd., Brno, Czech Republic
  • Department of Process Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, Czech Republic
  • Department of Process Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, Czech Republic

References

  • Beshay K. R., Kratěna J., Fořt I., Brůha O., 2001. Power input of high-speed rotary impellers. Acta Polytechnica, 41, 18-23.
  • Bujalski W., Nienow A.W., Chatwin S., Cooke M., 1987. The dependency on scale of power numbers of Rushton disc turbines. Chem. Eng. Sci., 42, 317-326. DOI: 10.1016/0009-2509(87)85061-3.[Crossref]
  • Cavadas A., Pinho F.T., 2004. Some characteristics of stirred vessel flows of dilute polymers solutions powered by a hyperbolic impeller. Can. J. Chem. Eng. 82, 289-302. DOI: 10.1002/cjce.5450820210. [Crossref]
  • Czech Standard CVS (ČSN). Mixing and Mixing Equipment. 691000, Prague, 1960.
  • Fořt I., Jirout T., 2011. A study on blending characteristics of axial flow impellers. Chem. Proc. Eng., 32 (4), 311-319. DOI: 10.2478/v10176-011-0025-3.[Crossref]
  • Fořt I., Jirout T., Rieger F., Allner R., Sperling R., 2001. Study of the blending efficiency of pitched blade impellers. Acta Polytechnica, 41, 7-13.
  • Grenville R.K., Nienow A.W., 2003. Blending in miscible liquids, In: Paul E.L., Otiemo-Obeng V.A., Kresta S.M. (Eds.), Industrial mixing. Science and practice. Wiley Interscience, New York.
  • Khang S.J., Levenspiel O., 1976. New scale-up and design criteria for stirrer agitated batch mixing vessel. Chem. Eng. Sci., 31, 569-577. DOI: 10.1016/0009-2509(76)80020-6.[Crossref]
  • Kramers H., Baars G.M., Knoll W.H., 1953. A comparative study on the rate of mixing in stirred tanks. Chem. Eng. Sci., 2, 35-42. DOI: 10.1016/0009-2509(53)80006-0.[Crossref]
  • Medek J., 1980. Power characteristics of agitators with flat inclined blades. Int. Chem. Eng., 20(4), 664-672.
  • Rieger F., Jirout T., Ceres D., Mazoch J., 2011. Homogenization and suspension efficiency of hydrofoil impeller TX445. The 38th Slovak Iternational Conference on Chemical Engineering, Tatranské Matliare, Slovakia, May 23-27, 2011.
  • Rieger F., Jirout T., Ceres D., Seichter P., 2011a. Homogenization and suspension efficiency of hydrofoil impeller TX335. The 12th Polish Conference on Mixing., Międzyzdroje, Poland, 6-9 June 2011.
  • Rieger F., Seichter P., Kuncewicz C., Ceres D., 2011b. Mixing of suspensions by pitched blade impellers. Inz. Aparat. Chem., 50, 7-8 (in Polish).
  • Rieger F., Jirout T., Ceres D., Pešl L., 2012. Homogenization and suspension efficiency of hydrofoil impeller TX 535. The 20th International Congress of Chemical and Process Engineering CHISA 2012. Prague, Czech Republic, 25-29 August 2012.
  • Seichter P., Pešl L., 2005. Design of rotary impellers- science or art? CHEMagazin, 15, 8-11 (in Czech).
  • Tatterson G. B., 1991. Fluid mixing and gas dispersion in agitated tanks. McGraw-Hill, New York, 121-215. www. invent-uv.de/hyperclassic-mixer.2

Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_cpe-2013-0035
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