Dynamic Monitoring of Bulk Materials in Silos

  • ChemPubSoc Europe Logo
  • Author: Cordula Buse
  • Published Date: 13 August 2018
  • Source / Publisher: Chemical Engineering & Technology/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: Dynamic Monitoring of Bulk Materials in Silos

The mechanical and physical properties of agricultural bulk materials, such as wheat or corn, affect their behavior during transport and storage processes, e.g., in silos. The use of optical monitoring methods in such enclosed spaces is very difficult. Electrical capacitance tomography (ECT) is a non‐destructive and contactless method for measuring the inner space of the silo. It relies on changes in permittivity. With sensors evenly spaced around the circumference of the silo, it is a very effective technique to obtain real-time information about the behavior of the materials stored within.

David Zurovec and colleagues, Technical University of Ostrava, Czech Republic, used ECT to monitor the discharge of wheat and corn grains from a test silo with two differently sized openings. ECT measurements showed that, in general, both grains discharge in a similar way with respect to flow types. However, the influence of the different physical and mechanical properties was mainly reflected in different discharge times. If the orifice is too small in comparison to the material size, this leads to flow disturbances such as "bridging" (when grains form an arch over the opening). A bigger orifice eliminates the problem, resulting in a continuous flow.

The results demonstrate that the monitoring of discharge processes from a silo using ECT could be an innovative online monitoring method with a wide range of applications.


Article Views: 886

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter

A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH