Turbulent liquid–liquid dispersion in SMV static mixer at high dispersed phase concentration
نویسندگان
چکیده
The aim of this paper is to investigate the influence of physico-chemical parameters on liquid–liquid dispersion at high dispersed phase concentration in Sulzer SMV mixer. Four different oil-in-water systems involving two different surfactants are used in order to evaluate the effect of interfacial tension, densities and viscosities ratio on mean droplets size diameters. Moreover the influence of the dispersed phase concentration on the pressure drop as well as on the droplet size distribution is investigated. Two different droplets size distribution analysis techniques are used in order to compare the resulting Sauter mean diameters. The comparison between residence time in the mixer and surfactants adsorption kinetics leads to take into account the evolution of the interfacial tension between both phases at short times. Finally experimental results are correlated as a function of dimensionless Reynolds and Weber numbers.
منابع مشابه
Experimental Investigation of Phase Inversion of Liquid-Liquid Systems in a Spray Extraction Column
An experimental study of the phase inversion behavior of liquid-liquid dispersion has been conducted in a spray extraction column for systems of toluene / water, n-hexane/water, CCl4/water, toluene /water + glycerol (25 % wt), toluene + CCl4 (25 % wt) / water and toluene / acetic acid (5 % wt)/water. The effects of physical properties, mass transfer and column geometry...
متن کاملDispersion Parameters and Effect of Impeller Speed, Holdup and Volume Fraction of Dispersed Phase on Separation Efficiency, Mass Transfer Coefficient of Dispersed Phase and Distribution Coefficient on Mixer-Settler Set
An experimental study has been conducted on the hydrodynamics of a stage mixer-settler to obtain an appropriate design. In this paper several tests was performed to investigate full factorial design of experiments. Since each test was repeated seven times, the repeatability of the test was confirmed (P=1 bar and T=25 °C). Sauter diameter was determined by photographing both the mix...
متن کاملNumerical Solutions of Population Balance Equations within Liquid/Gas–Liquid Flow Simulations
Numerical solvers based on population balance equations (PBE) coupled with flow equations are a promising approach to simulate liquid/gas–liquid dispersed flows which are very commonly observed in the nature and in industrial processes. Our aim is to discuss the challenges for the numerical solution of the coupled equation systems and to present detailed numerical recipes whose main ingredients...
متن کاملHydrodynamic Characterization of Mixer-Settlers in Extraction of Zirconium with TBP
An experimental study has been made of the hydrodynamics of a stage mixer-settler to obtain appropriate design information. In this paper several tests were done according to full factorial design of experiments with high reliability, since each test recurs seven times and the results of them are very close to each other(P=1bar and T=25 °C). Sauter diameter in each test is determined with ...
متن کاملThe Effects of Operational Parameters on the Efficiency of a Mixer-Settler Extractor
The effects and influences of various operational parameters on the efficiency of mixer-settlers are thoroughly studied in this paper. One of the most important factors in designing a mixer-settler is to obtain an optimum operational extraction and overall efficiency. These two factors are dependent on various parameters such as impeller shape, size and speed of impeller, baffle size, residence...
متن کامل