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

被引：6

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
Barrau, E
Rivière, N
Poupot, C
Cartellier, A
[J]. INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 1999, 25 (02) : 229 - 256
[2] The prediction of dispersed flows boundaries in liquid-liquid and gas-liquid systems
Brauner, N
[J]. INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 2001, 27 (05) : 885 - 910
[3] Influence of coalescence behaviour of the liquid and of gas sparging on hydrodynamics and bubble characteristics in a bubble column
Camarasa, E
Vial, C
Poncin, S
Wild, G
Midoux, N
Bouillard, J
[J]. CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 1999, 38 (4-6) : 329 - 344
[4] Cartellier A, 2001, CHEM ENG TECHNOL, V24, P535, DOI 10.1002/1521-4125(200105)24:5<535::AID-CEAT535>3.0.CO
[5] 2-X
[6] Mass transfer in bubble column for industrial conditions - effects of organic medium, gas and liquid flow rates and column design
Chaumat, H
Billet-Duquenne, AM
Augier, F
Mathieu, C
Delmas, H
[J]. CHEMICAL ENGINEERING SCIENCE, 2005, 60 (22) : 5930 - 5936
[7] Colvert J. H., 1989, U. S. Patent, Patent No. [4,874,583, 4874583]
[8] Deen N., 2010, Ullmann's Encyclopedia of Industrial Chemistry
[9] Effects of sparger height and orifice orientation on solids dispersion in a slurry bubble column
Gandhi, B
Prakash, A
Bergougnou, MA
[J]. CANADIAN JOURNAL OF CHEMICAL ENGINEERING, 1999, 77 (02) : 383 - 391
[10] THE DESIGN OF DISTRIBUTORS FOR GAS-FLUIDIZED BEDS
GELDART, D
BAEYENS, J
[J]. POWDER TECHNOLOGY, 1985, 42 (01) : 67 - 78

← 1 2 3 →