Experimental Investigation of Particle Size Effect on Agglomeration Behaviors in Gas鈥揝olid Fluidized Beds
详细信息 查看全文
- 作者：Jingdai Wang ; Qiang Shi ; Zhengliang Huang ; Yubin Gu ; Lungu Musango ; Yongrong Yang
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2015
- 出版时间：December 9, 2015
- 年：2015
- 卷：54
- 期：48
- 页码：12177-12186
- 全文大小：597K
- ISSN：1520-5045
文摘
A novel induction heating apparatus is designed to mimic the exothermic process in an olefin polymerization gas鈥搒olid fluidized bed. Wax/graphite composites with core鈥搒hell structure are used as tracer particles to capture the agglomerates formed in the cold mode experiments. Pressure fluctuation sensors and image analysis methodology are used to characterize the detailed information on agglomerates such as mass, size, and compositions. Experimental results reveal that when the mass fraction of tracer particles is above 10%, agglomerates are formed in the fluidized bed. Compared with coarse particles, small particles lead to agglomeration much easier, and coalescence of small鈥搒mall particles or small鈥揷oarse particles is the main mechanism by which agglomeration occurs. Analyzing the collision process of small particles and coarse particles, we conclude that collisions among small particles or collisions between small and coarse particles are more frequent and efficient than that of coarse particles.