Water Modeling Study on Dispersed Phase Size Distribution and Interface Areas in Metallurgical Multiphase Reactor

2014 ◽  
Vol 1052 ◽  
pp. 567-573
Author(s):  
Ren Chen ◽  
Yan Huang ◽  
Ling Ling Li ◽  
Zhi Guo Luo
Keyword(s):  
Size Distribution ◽  
Empirical Formula ◽  
Dispersed Phase ◽  
Water Modeling ◽  
Operation Conditions ◽  
Box Counting ◽  
Granularity Level ◽  
Phase Size ◽  
The Law ◽  
Modeling Study

The combined blowing process of metallurgical multiphase reactor was simulated by water modeling. The effects of operation conditions on dispersed phase size distribution were studied and an empirical formula was obtained. Based on the law of additive codimensions, the interface areas under different operation conditions were calculated by means of box counting and projection relationship. The results show that the frequency of dispersed phase with certain granularity level are in a certain proportion to its size level, and the dispersed phase areas are influenced by the top and bottom combined blowing.

Modeling of the Dispersed-Phase Size Distribution in Bubble Columns

2002 ◽  
Vol 41 (10) ◽  
pp. 2560-2570 ◽  
Author(s):  
Lars Hagesaether ◽  
Hugo A. Jakobsen ◽  
Hallvard F. Svendsen
Keyword(s):  
Size Distribution ◽  
Bubble Columns ◽  
Dispersed Phase ◽  
Phase Size

Chemical Kinetics in Dispersed-Phase Reactors

2003 ◽  
Vol 1 (1) ◽  
Author(s):  
Ben J McCoy ◽  
Giridhar Madras
Keyword(s):  
Size Distribution ◽  
Chemical Reaction ◽  
Chemical Engineering ◽  
Numerical Solutions ◽  
Continuous Phase ◽  
Reaction Engineering ◽  
Dispersed Phase ◽  
Mass Balances ◽  
Distribution Dynamics ◽  
Phase Size

Many chemical engineering processes occur under conditions when a dispersed phase undergoes fragmentation (breakup) and/or aggregation (coalescence). It is of considerable interest to model a chemical process that occurs at the interface and therefore depends on the evolving size distribution of the dispersed phase. We apply distribution kinetics to represent the evolution of the dispersed-phase size distribution for simultaneous fragmentation and coalescence. The continuous phase with dissolved reactant enters and exits a continuous-flow stirred-tank reactor. When the dispersed phase contained within the vessel satisfies a similarity solution, several rate expressions, including one for interphase mass transfer, that depend on mass moments of the size distribution allow analytical or simple numerical solutions. The solutions demonstrate how chemical reaction mass balances can be combined with distribution dynamics to extend chemical reaction engineering analysis.

Effect of Shear and Water Cut on Phase Inversion and Droplet Size Distribution in Oil–Water Flow

2018 ◽  
Vol 141 (3) ◽  
Author(s):  
Mo Zhang ◽  
Ramin Dabirian ◽  
Ram S. Mohan ◽  
Ovadia Shoham
Keyword(s):  
Size Distribution ◽  
Droplet Size ◽  
Phase Inversion ◽  
Droplet Size Distribution ◽  
Continuous Phase ◽  
Dispersed Phase ◽  
Water Emulsion ◽  
Inversion Region ◽  
Oil Water ◽  
Water Cut

Oil–water dispersed flow occurs commonly in the petroleum industry during the production and transportation of crudes. Phase inversion occurs when the dispersed phase grows into the continuous phase and the continuous phase becomes the dispersed phase caused by changes in the composition, interfacial properties, and other factors. Production equipment, such as pumps and chokes, generates shear in oil–water mixture flow, which has a strong effect on phase inversion phenomena. The objective of this paper is to investigate the effects of shear intensity and water cut (WC) on the phase inversion region and also the droplet size distribution. A state-of-the-art closed-loop two phase (oil–water) flow facility including a multipass gear pump and a differential dielectric sensor (DDS) is used to identify the phase inversion region. Also, the facility utilizes an in-line droplet size analyzer (a high speed camera), to record real-time videos of oil–water emulsion to determine the droplet size distribution. The experimental data for phase inversion confirm that as shear intensity increases, the phase inversion occurs at relatively higher dispersed phase fractions. Also the data show that oil-in-water emulsion requires larger dispersed phase volumetric fraction for phase inversion as compared with that of water-in-oil emulsion under the same shear intensity conditions. Experiments for droplet size distribution confirm that larger droplets are obtained for the water continuous phase, and increasing the dispersed phase volume fraction leads to the creation of larger droplets.

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