Roto-aerated Vs. Concurrent Dryers

  • Author: Elmar Zimmermann
  • Published Date: 11 November 2010
  • Source / Publisher: Chemical Engineering and Technology/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: Roto-aerated Vs. Concurrent Dryers

Conventional rotary dryers are used in many industrial sectors, including the cement, fertilizer, and mineral industries. Because of the complexity involved in estimating some parameters, most rotary dryers are over-designed, wasting thermal energy and, hence, leading to unnecessarily high costs.


Marcos Barrozo and colleagues, Federal University of Uberlândia, Brazil, evaluated the effects of rotational speed, air velocity, material flow rate, and drum slope on the mean residence time and holdup in a concurrent rotary dryer. The performance of the concurrent rotary dryer was then compared with that of a roto-aerated dryer.


The roto-aerated dryer showed a 36 % shorter residence time (on average) than the conventional concurrent cascade configuration. Furthermore, the difference between inlet and outlet solids temperature was 1.4- to 3.6-fold higher in the roto-aerated dryer than in the conventional concurrent rotary dryer.


Article Views: 5081

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

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH