Solids flow mapping in a gas-solid riser: Mean holdup and velocity fields

被引：93

作者：

Bhusarapu, Satish ^{[1
]}

Al-Dahhan, Muthanna H. ^{[1
]}

Dudukovic, Milorad P. ^{[1
]}

机构：

[1] Washington Univ, Dept Chem Engn, Chem React Engn Lab, St Louis, MO 63130 USA

来源：

POWDER TECHNOLOGY | 2006年 / 163卷 / 1-2期

关键词：

riser; solids; fluid dynamics; computed tomography; radioactive particle tracking;

D O I：

10.1016/j.powtec.2006.01.013

中图分类号：

TQ [化学工业];

学科分类号：

0817 [化学工程与技术];

摘要：

In this study, solids flow dynamics has been investigated in a 6 in. "cold-flow" circulating fluidized bed riser using non-invasive flow techniques. Gamma ray Computed Tomography (CT) has been used to measure the time-averaged cross-sectional solids holdup distribution. The time-averaged mean and fluctuating solids velocity fields have been quantified using the Computer Automated Radioactive Particle Tracking (CARPT) technique. Details of the experimental techniques, protocol of implementation and data analysis are discussed. The experimental studies examine operating conditions in fast fluidization and dilute phase transport regimes. Comparative and symbiotic analyses of the results obtained from CARPT and CT have been used to develop a coherent picture of the solids flow field. In addition, this work also demonstrates the power of CARPT and CT as flow mapping techniques in studying highly turbulent and opaque multiphase systems. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：98 / 123

页数：26

共 97 条

[1]

AZZI M, 1991, CIRCULATING FLUIDIZE, V3, P189

[2]

BADER R, 1988, CIRCULATING FLUIDIZE, V3, P123

[3]

Characteristics of gas-fluidized beds in different flow regimes [J].