Maximizing impeller power efficiency in gas-solid-liquid stirred vessels through process intensification

Davoody, M, Raman, A and Parthasarathy, R 2015, 'Maximizing impeller power efficiency in gas-solid-liquid stirred vessels through process intensification', Industrial and Engineering Chemistry Research, vol. 54, no. 47, pp. 11915-11928.


Document type: Journal Article
Collection: Journal Articles

Title Maximizing impeller power efficiency in gas-solid-liquid stirred vessels through process intensification
Author(s) Davoody, M
Raman, A
Parthasarathy, R
Year 2015
Journal name Industrial and Engineering Chemistry Research
Volume number 54
Issue number 47
Start page 11915
End page 11928
Total pages 14
Publisher American Chemical Society
Abstract In this work, suspension of ultrahigh concentration solids in the presence of gas at different solids concentrations, gas flow rates, and impeller types was studied in a mechanically agitated vessel. A term defined as the power efficiency factor (εjsg−1 (kg/W)) serves as an indication of the quantity of particles that could be suspended per unit of power consumed by the impeller. Accordingly, it was found that the εjsg−1 values can be maximized by operating the mixing tank with an optimum range of solids concentration, which is given as Cv ≈ 0.2−0.3 (v/v) for the systems studied in this work. It was observed that large mixed flow impellers were more energy-efficient when the tank was operated under aerated conditions with an optimum concentration of solids. A mathematical model was developed to predict the impeller specific power εjsg (W/kg), which can be used to determine the optimum solids concentration in three-phase stirred vessels, and its predictions exhibited reasonable agreement with the experimental results.
Subject Chemical Sciences not elsewhere classified
DOI - identifier 10.1021/acs.iecr.5b02440
Copyright notice © 2015 American Chemical Society
ISSN 0888-5885
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