文献类型：期刊文献

英文题名：Experimental and predictive research on solids holdup distribution in a CFB riser

作者：Li, Yongzheng[1];Zhai, Guangwei[2];Zhang, Haitao[1];Li, Tao[1];Sun, Qiwen[2];Ying, Weiyong[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Minist Educ, Engn Res Ctr Large Scale Reactor Engn & Technol, Shanghai 200237, Peoples R China;[2]State Key Lab Coal Liquefact & Coal Chem Technol, Shanghai 201203, Peoples R China

年份：2019

卷号：344

起止页码：830

外文期刊名：POWDER TECHNOLOGY

收录：;EI(收录号：20185206316781);WOS:【SCI-EXPANDED(收录号:WOS:000461262200080)】；

基金：The authors gratefully acknowledge the financial support of the National High-Tech R&D Program of China (2011AA05A204).

语种：英文

外文关键词：Circulating fluidized bed; Riser; Development region; Solids holdup; Optical fiber probe; New Correlation

摘要：The present work focuses on the axial and radial distribution of the solids holdup in the flow development region of a CFB riser. The effects of operating conditions (superficial gas velocity and solids circulation rate) and particle properties (particle density and size) on solids holdup are investigated by an optical fiber probe (PC6M). The solids holdup is higher in the lower section than that in the upper section of the riser, and is lower in the center than in the wall region of the riser. Increasing the solids circulation rate or decreasing the gas velocity results in the increment of the solids concentration and radial non-uniformity. With the increase of the particle density and size, the solids concentration increases, which is more evident at the lower part of the riser. Empirical correlations for predicting the cross-sectional averaged solids holdup and local solids holdup are developed respectively based on lots of experimental data. A good agreement is obtained between the predicted results and experimental data of the present work and many other data reported in the literature. (C) 2018 Elsevier B.V. All rights reserved.