ZHOU Quan, JIANG Congbin, CUI Kunda, DING Jianping,CHEN Wei, CHEN Shuanzhu， GUO Jinjun

(Changzheng Engineering Co., Limited, Beijing 101111，China)

Abstract: Proper design of gas distributor was crucially critical to the performance of fluidized beds flow. In this work, sintered metallic porous materials was used as distributor, which was inclined at the bottom of the fluidized bed. Under specific fluidized velocity, it was found that the fluidizing gas favorites to flow through the less-resistance region where the height of bed is lowest. Meanwhile, two-fluid model based on Eulerian-Eulerian framework was used to simulate the gas-particle flow in the bed, and the distributor is simplified as porous media. The results show that the prediction of fluidization characteristics is in agreement with experimental observation. Keeping constant fluidized velocity and increasing the pressure drop through distributor, the quality of fluidization is improved. Numerical simulations indicate that drag coefficients have a negligible effect on the predicted onset of fluidization, while Syamlal & O’Brien drag model gives a minimum bed expansion height.

Keywords: inclined distributor; porous media; fluidized bed; numerical simulation; drag models

文章编号：1008-5548(2020)02-0013-07

DOI:10.13732/j.issn.1008-5548.2020.02.003

中图分类号：TQ018                               文献标志码：A

收稿日期： 2019-09-23，修回日期：2019-11-05，在线出版时间：2019-12-31 08:52。

基金项目：国家重点研发计划资助项目，编号：2017YFB0602700。

第一作者简介：周泉(1986—)，男，博士，工程师，研究方向为煤气化与气固两相流。E-mail：zhouquan@china-ceco.com。