LIU Azhen1,2, ZHANG Weiyi1,2, LI Hanyong2, LI Xingbo2
(1. Department of Environment and Life, Beijing University of Technology, Beijing 100124,China;2. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617,China)
Abstract: In order to study the particle fluidization characteristics of solid particles with high wear resistance and high corrosion in liquid-solid fluidized bed, aluminum oxide, zirconia and bearing steel with different particle sizes were used to conduct experiments in vertical glass cylindrical riser, and the minimum fluidization velocity of particles in liquid-solid fluidized bed was discussed. The experimental results obtained the minimum fluidization velocity of five different particles. The experimental values were compared with the calculated values of empirical formula to verify the calculation accuracy of traditional empirical formula and the availability of experimental data, as well as the effects of particle density and particle size on the minimum fluidization velocity. According to the experimental results, using the least square method, a new correction coefficient was proposed based on the traditional empirical formula. When the diameter is greater than 2.5mm and the critical Reynolds number is greater than 175, the calculation accuracy of this formula is higher.
Keywords: liquid-solid fluidized bed; fluidization; minimum fluidization velocity; particle property
中图分类号：O359; TQ050.4
文献标志码：A
文章编号：1008-5548(2021)03-0043-07
DOI:10.13732/j.issn.1008-5548.2021.03.006
收稿日期： 2020-12-07，修回日期：2021-02-28，在线出版时间：2021-04-07 12:58。
基金项目：国家自然科学基金项目，编号：51774046。
第一作者简介：刘阿珍(1994—)，女，硕士研究生，研究方向为强化传热传质、 液-固流态化。E-mail：a19950813liu@163.com。
通信作者简介：张卫义(1963—)，男，硕士，副教授，硕士生导师，研究方向为过程装备机械、 液-固流态化。E-mail：zhangweiyi@bipt.edu.cn。
