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Solids suspension agitation in square tanks
Author(s) -
Mitchell Emily T.,
Myers Kevin J.,
Janz Eric E.,
Fasano Julian B.
Publication year - 2008
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.20004
Subject(s) - impeller , baffle , suspension (topology) , square (algebra) , power (physics) , suspended solids , agitator , materials science , mechanics , engineering , mechanical engineering , marine engineering , waste management , mathematics , physics , thermodynamics , geometry , wastewater , homotopy , pure mathematics
The Zwietering correlation for the just‐suspended speed has been modified to include baffling and geometric effects (impeller‐to‐tank diameter ratio and impeller off‐bottom clearance) for two impeller types (high‐efficiency and pitched‐blade). Baffles are generally not required when using square tanks although they improve solids suspension performance of pitched‐blade turbines. Comparison of square tank solids suspension to that in a fully baffled cylindrical tank has also been made. Very little difference was observed in the power number, but the just‐suspended speed, torque, and power requirements were higher in the square tank.