Abstract
Mixing and drying characteristics were inverstigated experimentally in a four sectional fluidized bed dryer operating crosscurrently with respect to particles and drying air flow.The magnitude of the backmixing flow rate at a section was estimated by comparing the calculated cumulative residence time distribution and residence time distribution functions, F (t) and E (t) which could be obtained from the theoretical backmixing multi-sectional model with the experimental F (t) and E (t) using the colored particles as a tracer. As a result, the experimental ratio of the back flow rate to the forward rate at a section was 25 to 50%.In the analysis of drying characteristics, the moisture content in the discharge at final section was calculated numerically by coupling the E (t) under perfect mixing conditions at each of the sections when the back flow rate is negligible. When all particles have the same residence time, the moisture content was also calculated. The moisture content of the particles obtained from the drying experiment was compared with the calculated moisture content. Millet particles were used in the experiments. A relatively good agreement was obtained between the observed and the above two claculated moisture contents of particles.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Society of Powder Technology, Japan
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
