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Influence of Spacing of Multiple Impellers on Power Input in an Industrial-Scale Aerated Stirred Tank Reactor
Citation Link: https://doi.org/10.15480/882.2533
Publikationstyp
Journal Article
Publikationsdatum
2019-11-13
Sprache
English
Author
Fitschen, Jürgen
Institut
TORE-URI
Enthalten in
Volume
91
Issue
12
Start Page
1794
End Page
1801
Citation
Chemie-Ingenieur-Technik 12 (91): 1794-1801 (2019)
Publisher DOI
Scopus ID
Publisher
Wiley-VCH Verl.
Despite the fact that aerated stirred tank reactors are widely used in industry and often studied, their design and scale-up still remains challenging. Especially the specific power input is a crucial and geometry-dependent scale-up parameter, usually calculated with the dimensionless power number Po. Within the scope of this study, the power number is measured for different stirrer types and configurations in a laboratory and an industrial-scale aerated stirred tank reactor. Good agreements to literature are found for the unaerated case for the two-stage stirrer configurations at different stirrer spacing for both scales. By literature only the aerated case in the laboratory scale can be predicted. Scale-up of an aerated industrial-scale reactor is challenging because of a specific influence of the aeration. In case of a three-stage Rushton configuration, an asymmetrical distribution of the stirrers should be preferred to ensure a high power number as well as good power performance under aerated conditions.
Schlagworte
aerated stirred tank reactors
power input performance
scale-up
DDC Class
540: Chemie
620: Ingenieurwissenschaften
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