Agitator design for solids suspension under gassed conditions

Design of mechanical agitators for solids suspension under gassed conditions can be achieved using a constant ungassed torque criterion if the solids suspension task is more difficult than the gas dispersion task. When gas dispersion is the more difficult task, design for complete gas dispersion wil...

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Veröffentlicht in:Canadian journal of chemical engineering 1999-10, Vol.77 (5), p.1065-1071
Hauptverfasser: Lehn, Mary C., Myers, Kevin J., Barker, André
Format: Artikel
Sprache:eng
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Zusammenfassung:Design of mechanical agitators for solids suspension under gassed conditions can be achieved using a constant ungassed torque criterion if the solids suspension task is more difficult than the gas dispersion task. When gas dispersion is the more difficult task, design for complete gas dispersion will ensure solids suspension. Evidence supporting this approach is very strong for radial‐flow impellers, but less so for up‐pumping and down‐pumping axial‐flow impellers. La conception d'agitateurs mècaniques pour la suspension de solides en conditions arès peut ětre effectuè äl'aide d'un criteáre de couple non aèrè constant lorsque la suspension des solidesest plus difficile ä rèaeliser que la dispersion du gaz. Lorsque la dispersion du gaz est plus difficile ä rèaliser, une conception basèe sur la dispersion compleáte du gaz assurera la suspension des solides. Les preuves soutenant cette approche sont treás èvidentes pour les turbines ä ècoulement radial, mais moins pour les turbines ä ècoulement axial ä pompage ascendant et ä pompage descendant.
ISSN:0008-4034
1939-019X
DOI:10.1002/cjce.5450770537