Modeling the effects of solid particles in CFD-PBM simulation of slurry bubble columns

被引：48

作者：

An, Min ^{[1
,2
]}

Guan, Xiaoping ^{[1
]}

Yang, Ning ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China

来源：

CHEMICAL ENGINEERING SCIENCE | 2020年 / 223卷

基金：

中国国家自然科学基金;

关键词：

CFD-PBM simulation; Bubble size distribution; Hydrophilic particles; Slurry bubble column; Film drainage; Turbulence; POPULATION BALANCE MODEL; GAS HOLD-UP; NUMERICAL-SIMULATION; REGIME TRANSITION; STABILITY CONDITION; THEORETICAL-MODEL; FLOW STRUCTURE; RISE VELOCITY; COALESCENCE; SIZE;

D O I：

10.1016/j.ces.2020.115743

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Prediction of gas holdup and bubble size distribution is of paramount importance for modeling mass and heat transfer and reactions in multiphase reactors. Addition of hydrophilic particles into gas-liquid systems usually decreases gas holdup and increases bubble size. Rational prediction is still difficult in view of the complex effects of solid particles on gas-liquid flows, e.g., the increase of slurry apparent density and viscosity, the reduced film drainage time during bubble coalescence, and the attenuation of liquid turbulent dissipation rate. This work attempts to construct a rational step-by-step approach to analyze these particle effects in CFD-PBM modeling. First, the EMMS-PBM approach is used to improve the BSD simulation in a solid-free system. Then for a gas-slurry system, we propose a correlation of attenuation factor for turbulent dissipation rate in PBM kernel models. Combining EMMS-PBM and the attenuation factor can well predict the gas holdup and BSD in slurry bubble columns. (c) 2020 Elsevier Ltd. All rights reserved.

引用

页数：13

共 76 条

[1] EFFECT OF SOLID PARTICLES ON GAS HOLDUP IN FLOTATION COLUMNS .2. INVESTIGATION OF MECHANISMS OF GAS HOLDUP REDUCTION IN PRESENCE OF SOLIDS [J].