Numerical study of particle behaviours and heat transfer in a complex rotary kiln  

作　　者：Qingshan Jian Hailin Gu Kaige Wang Shuai Wang Mingxiu Zhan Jinqing Wang Longjie Ji Zuohe Chi Guangxue Zhang 

机构地区：[1]The Institute for Energy Engineering,China Jiliang University,Hangzhou,310000,China [2]Qingshanhu Energy Research Center,Zhejiang University,Hangzhou,311305,China [3]State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou,310027,China [4]Beijing Construction Engineering Group Environmental Remediation Co.,Ltd,Beijing,100015,China

出　　处：《Particuology》2024年第9期81-94,共14页颗粒学报（英文版）

基　　金：the National Natural Science Foundation of China(grant No.52306207);the Key R&D Program of Zhejiang province(grant No.2022c03056);the“Leading Goose”R&D Program of Zhejiang province(grant No.2023C03157);the National Key R&D Program of China(grant No.2018YFC1802102).

摘　　要：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/(m^(3)K).

关 键 词：Rotary kiln LIFTER Particlemotion Heat transfer CFD-DEM 

分 类 号：TQ03[化学工程]