Improving solid-liquid mass transfer and energy efficiency in agitated high concentration slurries

Bong, E, Parthasarathy, R, Wu, J and Eshtiaghi, N 2012, 'Improving solid-liquid mass transfer and energy efficiency in agitated high concentration slurries', in Enrique Galindo (ed.) Proceedings of the 2012 NAMF: Mixing XXIII Conference, Quintana Roo, Mexico, 17-23 June 2012, pp. 1-13.


Document type: Conference Paper
Collection: Conference Papers

Title Improving solid-liquid mass transfer and energy efficiency in agitated high concentration slurries
Author(s) Bong, E
Parthasarathy, R
Wu, J
Eshtiaghi, N
Year 2012
Conference name Mixing XXIII (2012)
Conference location Quintana Roo, Mexico
Conference dates 17-23 June 2012
Proceedings title Proceedings of the 2012 NAMF: Mixing XXIII Conference
Editor(s) Enrique Galindo
Publisher North American Mixing Forum
Place of publication North America
Start page 1
End page 13
Total pages 13
Abstract Suspension of solids plays an important role in promoting mass transfer between solids and liquid in mechanically agitated vessels employed in mineral and chemical industries. This becomes especially important when high solids concentrations are used for the purpose of process intensification. Process intensification in agitated vessels (or mixing intensification) requires that the production rate per unit volume has to be increased without major changes in the geometry of the existing infrastructure. Most of the currently employed industrial agitated vessels have baffles in them because they are considered to provide better mixing thereby leading to uniform solids suspension and higher mass transfer rate. However, one of the recent studies by Wang et. al. (2012) has shown that removal of baffles is beneficial for achieving mixing intensification in ultrahigh solid concentrations at an optimum specific power input. Although off-bottom suspension of solids at higher solids concentration (under either baffled or unbaffled conditions) is important for improving the throughput, it will be unsatisfactory if there is no corresponding improvement in mass transfer rate. There have been many studies in the literature which focus on solid-liquid mass transfer in agitated vessels for a variety of geometric and operating conditions but majority of them involve low solids concentration ( <1 0% volume). This work focuses on the influence of geometric parameters such as baffling or impeller type on solid-liquid mass transfer rate and specific impeller power draw at high solids concentrations up to 30% (v/v).
Subjects Chemical Engineering not elsewhere classified
Carbon Capture Engineering (excl. Sequestration)
Copyright notice © 2012 North American Mixing Forum. All Rights Reserved.
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