The hydrodynamics of the fluidized packing contactor : an incipient flooding model

O'Neill, B. K. (1975). The hydrodynamics of the fluidized packing contactor : an incipient flooding model PhD Thesis, School of Engineering, The University of Queensland. doi:10.14264/uql.2015.525

       
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Author O'Neill, B. K.
Thesis Title The hydrodynamics of the fluidized packing contactor : an incipient flooding model
School, Centre or Institute School of Engineering
Institution The University of Queensland
DOI 10.14264/uql.2015.525
Publication date 1975-01-01
Thesis type PhD Thesis
Supervisor D. J. Nicklin
L. S. Leung
Total pages 1v
Language eng
Subjects 09 Engineering
Formatted abstract
A model is developed of gas liquid contactors in which the packing pieces are maintained in a fluidized state. The model proposes that the column can exist in either of two modes, namely fluidization without flooding and fluidization due to incipient flooding. The mode of operation established depends primarily on packing density and to a lesser extent on the packing size, liquid flow and liquid properties. Equations predicting the transition from one mode to the next are presented. The inherent advantages of operating in the "incipient flooding" mode are stressed. Correlations for minimum fluidization velocity and bed expansion are developed for this mode.

It is argued that the pressure build-up associated with flooding will be sufficient to support the weight of packing pieces and liquid in the column. At this stage, rather than reject counter current flow (true flooding) the bed expands to maintain a state of incipient flooding. In this way counter current flow can be maintained in a situation well above the normal flooding point. This explains the high performance of such units.
Keyword Packed towers
Hydrodynamics
Phase rule and equilibrium

Document type: Thesis
Collection: UQ Theses (RHD) - UQ staff and students only
 
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