Volume 92
Jian, Q., Gu, H., Wang, K., Wang, S., Zhan, M., Wang, J., . . . Zhang, G. (2024). Numerical study of particle behaviours and heat transfer in a complex rotary kiln. Particuology, 92, 81-94. https://doi.org/10.1016/j.partic.2024.04.004
Numerical study of particle behaviours and heat transfer in a complex rotary kiln
Qingshan Jian a, Hailin Gu a *, Kaige Wang b, Shuai Wang c, Mingxiu Zhan a, Jinqing Wang a, Longjie Ji d, Zuohe Chi a, Guangxue Zhang a
a The Institute for Energy Engineering, China Jiliang University, Hangzhou, 310000, China
b Qingshanhu Energy Research Center, Zhejiang University, Hangzhou, 311305, China
c State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China
d Beijing Construction Engineering Group Environmental Remediation Co., Ltd, Beijing, 100015, China
10.1016/j.partic.2024.04.004
Volume 92,
September 2024,
Pages 81-94
Received 3 January 2024, Revised 22 March 2024, Accepted 9 April 2024, Available online 23 April 2024, Version of Record 21 May 2024.
E-mail:
hlgu@cjlu.edu.cn
Highlights
• A novel rotary kiln with three different types of lifters is designed.
• Particle motion and heat transfer are studied by experiment and simulation.
• Effect of operation parameters on the outlet particle temperature are analyzed.
• Overall volumetric heat transfer coefficient of kiln is from 200 to 700 W/(m3 °C).
Abstract
Rotary kiln is widely used for thermal disposal of solid waste due to its effectiveness and high efficiency in recent years. To further improve the processing efficiency, a newly designed rotary kiln with three-section structure is proposed, and the behaviours of particle motion and heat transfer are investigated. Firstly, a lab-scale rotary kiln is manufactured, and experiments are carried out. Verified by experimental data, a CFD-DEM numerical model is developed to analyze the particle motion and heat transfer characteristics with the effects of inlet flue gas temperature, feeding rate and rotating speed. The results show that the outlet temperature increases linearly with the flue gas temperature, while it is negatively correlated with the feeding rate and rotating speed. In addition, the volumetric heat transfer coefficient in this complex rotary kiln is analyzed, the overall heat transfer coefficient is between 200 and 700 W/(m3 K).
Graphical abstract
Keywords
Rotary kiln; Lifter; Particle motion; Heat transfer; CFD-DEM
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