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Design of Sieve Plate Spargers for Bubble Columns: Role of Weeping
Author(s) -
Thorat B. N.,
Kulkarni A. V.,
Joshi J. B.
Publication year - 2001
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/1521-4125(200108)24:8<815::aid-ceat815>3.0.co;2-h
Subject(s) - froude number , sieve (category theory) , bubble , mechanics , range (aeronautics) , pressure drop , materials science , drop (telecommunication) , optics , chemistry , thermodynamics , physics , mathematics , composite material , flow (mathematics) , engineering , mechanical engineering , combinatorics
Abstract Weeping through perforated plates occurs when the pressure drop of the gas/vapor passing through it is insufficient to support the liquid. The critical weep velocities (V O, crit ) were measured for the plates having hole diameter range of 1 to 6mm. The thickness to hole diameter ratio (t/d O ) and the pitch to hole diameter ratio (P/d O ) were varied in the range of 1 to 6 and 3.9 to 25.8, respectively. It was found that the V O, crit is a strong function of plate parameters and the clear liquid height. A mathematical model for “No weep” condition was developed under the following two extreme conditions: (i) holes are partially open, (ii) holes are completely active. The results obtained from the experimentation and the mathematical correlation were put into a coherent form. The weeping criterion in terms of the Froude number was correlated with the plate parameters and the clear liquid height.