Mixing system for highly concentrated fine-grained suspensions

• Authors: Jiří Moravec , Tomáš Jirout , František Rieger , Lukáš Krátký
• Languages of publication: EN

Abstracts

EN

The mixing equipment for highly concentrated fine-grained suspensions must be designed differently from the equipment in which a suspension with a low concentration of the solid phase or bigger particles is mixed. It is due to the different rheological properties of the suspensions. In this work we are trying to find a suitable mixing system for a highly concentrated fine-grained suspension. The aim was to determine an effect of particular geometrical parameters of the tested mixing systems on a suspension process, especially from the energetic viewpoint. The energetic costs of all the used mixing systems were compared on the basis of the power consumption which was necessary for reaching the state of sufficient suspension movement in the whole mixed bulk. As a result, it was confirmed that multistage impellers can be used even in standard vessels (with a liquid level height equal to a vessel diameter) with a profit. During experiments, the state of sufficient movement was determined by a visual observation of the suspension at the vessel bottom, at the wall and also at the suspension level.

Keywords

EN

Mixing; suspension; high concentration; fine particles; rheology

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2009
• Volume: 11
• Issue: 4
• Pages: 52-56

Dates

published

1 - 1 - 2009

online

8 - 1 - 2010

Contributors

author

Jiří Moravec

• Faculty of Mechanical Engineering, Department of Process Engineering, Czech Technical University in Prague, Technická 4, 166 07 Prague 6, Czech Republic

author

Tomáš Jirout

• Faculty of Mechanical Engineering, Department of Process Engineering, Czech Technical University in Prague, Technická 4, 166 07 Prague 6, Czech Republic

author

František Rieger

• Faculty of Mechanical Engineering, Department of Process Engineering, Czech Technical University in Prague, Technická 4, 166 07 Prague 6, Czech Republic

author

Lukáš Krátký

• Faculty of Mechanical Engineering, Department of Process Engineering, Czech Technical University in Prague, Technická 4, 166 07 Prague 6, Czech Republic

References

• Moravec, J. & Rieger, F. (2008). Rheological behavior of high-concentrated fine-grained suspension. Czasopismo Techniczne 5-M/2008, 231-238.
• Rieger, F. & Moravec, J. (2007). Rheometry of the Fine Concentrated Suspensions. In Teoretičeskie osnovy sozdanija, optimizacii i upravlenija energo-i resursosberegajuščimi processami i oborudovaniem - Sbornik trudov, 2007, (pp. 75-83). Ivanovo, Russia. [in Russian].
• Rieger, F. (1993). Efficiency of agitators while mixing of suspensions. In 6th Polish Seminar on Mixing, 1993, (pp. 79-85). Zakopane, Poland.
• Rieger, F. & Rzyski, E. (2000). Mixing of suspensions in vessels of different diameters and with different types of impellers, Zeszyty Naukowe Politechniki Łódzkiej. Inżynieria Chemiczna i Procesowa (27), 221-226 [in Polish].

Identifiers

DOI

10.2478/v10026-009-0043-9