摘要：How to simultaneously regulate the residence time of polydisperse particles and completely inhibit particle backmixing remains a challenge of fluidization technology. In this study, it is shown that adding elutriation pipes into multiple-chamber fluidized beds to strengthen particle elutriation and entrainment is an effective measure. Coarse-grained CFD-DEM simulation results show that the addition of the elutriation pipe can completely inhibit the particle back-mixing between adjacent chambers, and the mean residence time (MRT) ratio of coarse and fine particles can be regulated to be larger than their diameter ratio. Furthermore, a study on the numbered-up multiple-chamber fluidized beds find that (i) the MRT ratio of coarse and fine particles can be larger than the 1.5th power of their diameter ratio with full suppression of particle back-mixing between adjacent chambers; (ii) the MRT of each size of particles is a linear function of chamber number, whereas the MRT ratio approaches an asymptotic value. The results are of guiding significance for improving the overall conversion rate of polydisperse particles.

关键字：Fluidization; Discrete simulation; Elutriation; Mean residence time difference; Back-mixing

ISSN号：0032-5910

卷、期、页：卷439

发表日期：2024-04-15

影响因子：0.000000

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：POWDER TECHNOLOGY

参与作者：Lu, Shuai,Lan, Bin,Li, Dandan,Fan, Chuanlin,Xu, Ji,Zou, Zheng,Li, Hongzhong,Zhu, Qingshan

第一作者：赵碧丹,王军武

论文类型：期刊论文

论文概要：Lu, Shuai,Lan, Bin,Li, Dandan,Fan, Chuanlin,Xu, Ji,赵碧丹,Zou, Zheng,Li, Hongzhong,王军武,Zhu, Qingshan，Regulation characteristics and law of residence time distribution of polydisperse particles in numbered-up multiple-chamber fluidized bed reactors，POWDER TECHNOLOGY，2024，卷439

论文题目：Regulation characteristics and law of residence time distribution of polydisperse particles in numbered-up multiple-chamber fluidized bed reactors