Premium
Fractional gas hold‐up in gas inducing type of mechanically agitated contactors
Author(s) -
Saravanan K.,
Joshi J. B.
Publication year - 1996
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450740104
Subject(s) - impeller , contactor , slip factor , materials science , blade (archaeology) , range (aeronautics) , mechanics , mechanical engineering , engineering , composite material , physics , thermodynamics , power (physics)
Fractional gas hold up was measured in gas inducing type of mechanically agitated contactors (GIMAC) with single and multiple impellers. Three vessels of 0.57, 1.0 and 1.5 m i.d. were used. For the multiple impeller system, six different impeller designs were employed. The impeller speed was varied in the range of 0.30 to 15.45 s −1 . The ratio of impeller diameter to tank diameter ( D/T ), the submergence ( S ) of the upper impeller, the clearance of the lower impeller from the tank bottom ( C 1 ) and the impeller spacing ( C 3 ) were varied over a wide range. The design of the lower impeller was optimized in terms of diameter ( D ), blade width ( W ), blade angle ( B ø), number of blades ( n b ) and the blade thickness ( t b ). An optimum design has been proposed for the multiple impeller system. Rational correlations have been proposed.