WU Lin^1,3,YU Hualong¹,HU Xia²,YU Hongjie⁴,PENG Wei¹,WEI Yaodong¹

(1.Faulty of Engineering,China University of Petroleum-Beijing at Karamay,Karamay 834000,China; 2.Department of Mechanical Engineering,Karamay Vocational and Technical College,Karamay 834000,China; 3.Patent Examination Cooperation Sichuan Center of the Patent Office,Chengdu 610056,China; 4.CNPC Chuanqing Drilling Engineering Company Limited,Chengdu 610056,China)

Abstract：The particle size distribution of catalyst in the dilute phase space of a bubbling fluidized bed is related to the fluidization velocity of the fluidized bed,and also related to the loss of fine particles in the fluidized bed.As the fluidization process operates continuously,the fine particles loss inevitably from fluidized bed,which directly influences the particle size distribution in the dilute phase space.Therefore,the particle size distribution in the dilute phase space has a time-varying characteristic.In this work,catalytic cracking balance catalyst and two-dimensional fluidized bed were selected to collect particle samples and analyze the particle size distribution in the dilute phase space,investigate the particle size distribution varying with time during the continuous fluidization.Experimental results show that the particle size distribution in the dilute phase space become coarser,median particle size and kurtosis become bigger with fine particle loss and tends to be stable after a period of operation.

Keywords：bubbling fluidized bed;dilute phase space;particle size distribution;time-varying characteristics;catalyst

Get Citation: WU L,YU H L,HU X,et al.Time-varying characteristics of particle size distribution in dilute phase space in bubbling fluidized bed[J].China Powder Science and Technology,2023,29(3)：12-20.

Received： 2022-10-04,Revised：2022-11-24,Online：2023-04-10 12：13。

Funding Project：国家自然科学基金项目,编号：21776305。

First Author：伍林(1989—),男,硕士研究生,研究方向为石油化工设备。E-mail：405587230@qq.com。

Corresponding Author：于化龙(1974—),男,副教授,博士,硕士生导师,研究方向为工程力学、流态化。E-mail：yuhualong@cup.edu.cn。