Journal
CHEMICAL ENGINEERING SCIENCE
Volume 75, Issue -, Pages 220-234Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2012.03.028
Keywords
Electrical capacitance tomography; Fluidized-bed; Drying; Hydrodynamics; Pharmaceuticals; Imaging
Categories
Funding
- Finnish Cultural Foundation
- Graduate School of Inverse Problems
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Fluidized-bed drying of wet granules is a common process in many industrial sectors, and monitoring of the moisture and the hydrodynamics of the granules during drying is important in order to ensure the quality of the final product. Electrical capacitance tomography (ECT) is an electrical imaging modality in which the permittivity distribution inside an object is computed using capacitive measurements from the boundary of the object and mathematical algorithms. Here, three-dimensional moisture distributions were computed through an experimentally determined relationship between granule moisture and relative permittivity. Estimates for the average moisture content were calculated and evaluated. The hydrodynamics of the wet granules were characterized with respect to air velocity and granule moisture. (c) 2012 Elsevier Ltd. All rights reserved.
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