Numerical Analysis of Solids Mixing in Pressurized Fluidized Beds

Share/Save/Bookmark

Deen, Niels G. and Willem, Godlieb and Sander, Gorter and Kuipers, J.A.M. (2010) Numerical Analysis of Solids Mixing in Pressurized Fluidized Beds. Industrial and Engineering Chemistry Research, 49 (11). pp. 5246-5253. ISSN 0888-5885

[img]PDF
Restricted to UT campus only
: Request a copy
3616Kb
Abstract:In the production and processing of granular matter, mixing of solids plays an important role. Granular materials such as sand, polymeric particles, and fertilizers are processed in different apparatuses such as fluidized beds, rotary kilns, and spouted beds. In the operation of these apparatuses, proper mixing is essential, as it helps to prevent the formation of hot spots, off-specification products, and undesired agglomerates. In this article, we discuss various methods that are available to give quantitative information on the solids mixing state in granular systems based on a discrete description of the solids phase. We apply the different methods to two-fluid model simulations. It is found that some of these methods are grid-dependent; not reproducible; sensitive to macroscopic flow patterns; and/or able to calculate only overall mixing indices, rather than indices for each direction. We compare some methods described in the literature, and in addition, we propose two new methods that do not suffer from the disadvantages mentioned above. Simulations are performed for seven different operating pressures. It is found that mixing improves with operating pressure as a result of increased porosity in the dense phase.
Item Type:Article
Copyright:© 2010 American Chemical Society
Research Group:
Link to this item:http://purl.utwente.nl/publications/73970
Official URL:http://dx.doi.org/10.1021/ie9014843
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page