Impact of plenum conditions and gas-liquid distributor on bubble column hydrodynamics

被引：7

作者：

Mach, Jacob ^{[1
]}

Parisien, Valois ^{[1
]}

Wiens, Jason ^{[2
]}

McKnight, Craig A. ^{[2
]}

Macchi, Arturo ^{[1
]}

机构：

[1] Univ Ottawa, Ctr Catalysis Res & Innovat, Dept Chem & Biol Engn, Ottawa, ON K1N 6N5, Canada

[2] Syncrude Canada Ltd, 9421-17 Ave, Edmonton, AB T6N 1H4, Canada

来源：

CHEMICAL ENGINEERING SCIENCE | 2020年 / 211卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Gas-liquid distributor; Plenum conditions; Energy dissipation rate; Turbulent bubble breakup; OPTICAL PROBES; MASS-TRANSFER; FLOWS; DISPERSION; 2-PHASE;

D O I：

10.1016/j.ces.2019.115296

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In an LC-Fining (TM) hydroprocessor, the orientation of the free surface in the plenum chamber and the efficiency of the internal gas-liquid separator impact the amounts of the gas and the liquid passing through individual bubble cap risers in the grid. Various gas and liquid flowrates were thus passed through a single bubble cap riser to determine resulting bubble properties. Bubble sizes correlated well with energy dissipation rate and gas-to-liquid velocity ratio to the power of -0.4 and 0.6, respectively, in agreement with theory on the turbulent breakup of dense dispersions. Bubbles were also influenced by the gas-liquid distributor geometry, where the bubble cap produced larger bubbles than a perforated plate. Finally, the size of bubbles sparged in the plenum marginally affected overall gas holdup, suggesting that a bubble cap distributor redesign should be prioritized over upstream gas introduction equipment to optimize the performance of the hydroprocessor. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：10

共 28 条

[1] Single and double optical probes in air-water two-phase flows:: real time signal processing and sensor performance [J].