Print: | ISSN 0256-1115 |
Online: | ISSN 1975-7220 |
Korean Journal of Chemical Engineering,
Vol.13, No.4, 337-342, 1996 INVESTIGATION OF FEEDPIPE BACKMIXING IN AN AGITATED VESSEL
Feedpipe backmixing in an agitated vessel was investigated using a newly developed conductivity technique. By this technique, the onset of feedpipe backmixing could be detected and the penetration depth of the vessel fluid into a feedpipe was determined. For a give feedpipe flowrate, critical agitator speeds to eliminate feedpipe backmixing were determined using Rushton six-bladed disk turbine impeller (6BD) and high efficiency, axial-flow type 3- bladed impeller (HE-3) of 8.89 and 12.70 cm diameters in 11.2 liter reactor. The ratio of the feedpipe velocity to the critical agitator speed (vf/vt) was determined as a function of feedpipe
Reynolds number (NRet). The conductivity technique was successful either in the laminar regime, the transitional regime, or in the turbulent regime in the feedpipe. [References]
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