Enhancing mixing of cohesive particles by baffles in a rotary drum

作     者：Zhixing Zhou Jihong Li Jingzhi Zhou Shizhong Li Junxiao Feng 

作者机构：Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China Beijing Engineering Research Centre of Biofuels China MOST-USDA Joint Research Center for Biofuels Beijing 100084 China Department of Thermal Science an-d Energy Engineering School of Mechanical Engineering University of Science and Technology Beifing Beijing 100081 China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2016年第14卷第2期

页      面：104-110页

核心收录：

学科分类：0820[工学-石油与天然气工程] 080706[工学-化工过程机械] 082001[工学-油气井工程] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by Beijing Science and Technology Innovation Base Cultivation and Development Project International Scientific and Technological Cooperation Program 国家科技部项目 

主　　题：Cohesive particles Mixing Baffles Rotary drum 

摘      要：A soft-sphere discrete cohesive powder model was used to simulate the transverse mixing of particles in a rotary drum. Using this model, the effect of cohesion strength and baffle length was investigated. Mixing time （tR） and mixing entropy were used to characterize the mixing behavior. The results showed that increasing particle cohesiveness increases tR. Baffles enhanced transverse mixing, especially for high- cohesive particles. Moreover, the baffle length played a significant role on mixing. An optimized length of 0.50 （L/R） enhances transverse mixing for high-cohesive particles, Further increases in baffle length only decreases the mixing rate by impeding the surface flow layer. In contrast to high-cohesive particles, low-cohesive particles needed much shorter baffles.A soft-sphere discrete cohesive powder model was used to simulate the transverse mixing of particles in a rotary drum. Using this model, the effect of cohesion strength and baffle length was investigated. Mixing time （tR） and mixing entropy were used to characterize the mixing behavior. The results showed that increasing particle cohesiveness increases tR. Baffles enhanced transverse mixing, especially for high- cohesive particles. Moreover, the baffle length played a significant role on mixing. An optimized length of 0.50 （L/R） enhances transverse mixing for high-cohesive particles. Further increases in baffle length only decreases the mixing rate by impeding the surface flow layer. In contrast to high-cohesive particles, low-cohesive particles needed much shorter baffles.