Open AccessEstimating Just Suspension Speed for Stirred Reactors Using Power Measurement
Author(s) -
Raja Shazrin Shah Raja Ehsan Shah,
Baharak Sajjadi,
Abdul Aziz Abdul Raman,
Tiam You See,
Shaliza Ibrahim,
YuanJi Mok
Publication year - 2019
Language(s) - English
Resource type - Journals
ISSN - 2636-994X
DOI - 10.22597/rcest.v2.58
Subject(s) - impeller , suspension (topology) , rushton turbine , distilled water , materials science , standard deviation , mechanics , work (physics) , agitator , relative standard deviation , power consumption , power (physics) , torque , phase (matter) , range (aeronautics) , mathematics , thermodynamics , chromatography , composite material , chemistry , physics , statistics , organic chemistry , homotopy , pure mathematics , detection limit
A simplified mathematical model was developed to predict the just suspended speed, NJS in a solid-liquid system by analyzing the net impeller power consumption to suspend solid particles. A fully baffled tank with an internal diameter of 400mm equipped with a standard Rushton turbine with a diameter of D=T/3 (133mm) was used in this work. Glass beads were used as the solid phase and distilled water was used as the liquid phase. Solid loadings were varied within the range of 0-27 wt%. Power consumption was measured using the shaft torque method. The predicted NJS values were in a good approximation to the experimental values using the Zwietering’s criterion with a deviation of 2 – 10%. The deviation was lower for higher solid concentrations.