A CFD modeling investigation for structure optimization of a rotary steam tube dryer

6th Annual International Conference on Material Science and Engineering

Li, Xuanyou^1 ; Gao, Ling^2 ; Yun, Dongling^1 ; Yang, Liguo^1 ; Geng, Wenguang^1 ; Wu, Jing^1

Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences), No.19 Keyuan Road, Jian, China^1

Jinan Fruit Research Institute All-China Federation of Supply and Marketing Co-operatives, No. 24 East Road of Yanzi Mountain District, Jinan, China^2

关键词: Concentration distributions;    Effective approaches;    Heat exchanging;    Optimized structures;    Particle velocities;    Particle velocity distributions;    Structure optimization;    Surface heat transfer coefficient;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/397/1/012076/pdf
DOI  :  10.1088/1757-899X/397/1/012076

来源: IOP

【 摘 要 】

This paper presents an optimized structure to improve the performance of rotary steam tube dryer by assembling the so called 'Y' shape flights. A verified CFD model, which was developed and validated in the previous work, was employed to verify the optimized structure by the comparisons of concentration distribution, velocity distribution and heat transfer coefficient. The simulation results showed that assembling 'Y' shape flights in a rotary steam tube dryer is an effective approach to increase material filling ratio and heat exchanging area. The optimized construction is able to reduce the wear of the material to the tube surface, due to the low maximum particle velocity. The optimized structure yields a uniform particle velocity distribution and high average surface heat transfer coefficient of tubes which is about ten times of that without flights.