Title:
Simulation of Flow and Design of Agitated Large-Volume Biorectors
Author(s):
Jirout, T., Potočiar, O.
Document(s):
Paper
Poster
Abstract:
Industrial fermenters are designed as large-volume equipment with a volume of several tens of m3 with side-entry impellers. For this reason, experimental modeling of mixing in those batches is very difficult and subsequent scale-up of the obtained results. In the literature, we very often encounter modeling of these processes that the geometric similarity is not entirely keep and particularly the ratio of impeller diameter to vessel diameter. Another manner is the replacement of the modeling impeller, which during maintaining geometric similarity has a very small and during production unattainable diameter, by same directed jet generating same flow as the impeller. Comparison of the adequacy of this replacement on the base of CFD simulations has been done within this study. The results of the CFD simulations have been experimentally verified in the vessel with diameter 1.6 m. The results confirmed that it is not possible for correct modeling of the flow in the agitated batch of the large-volume fermenters utilize replacement of the side-entry impeller by jet with same diameter and flow. However, a large amount of high quality information about mixing in reactors with centrally placed impellers can be found in the literature. Consideration, based on CFD simulations and experiments, which data for centrally placed impellers may be used for designing the side-entry impellers has been another aim of this study.
Keywords:
modelling, pilot plant, reactor
Topic:
Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Bioethanol and sugars from lignocellulosic biomass
Event:
25th European Biomass Conference and Exhibition
Session:
3CV.1.52
Pages:
1374 - 1380
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-3CV.1.52
Price:
FREE
