Which impeller should be chosen for efficient solid‐liquid mixing in the laminar and transitional regime?

AIChE Journal ◽  
2021 ◽  
Author(s):  
Bastien Delacroix ◽  
Louis Fradette ◽  
François Bertrand ◽  
Bruno Blais
Keyword(s):  
Transitional Regime ◽  
Liquid Mixing ◽  
Solid Liquid

Modeling evaluation on solid-liquid mixing characteristics in a dislocated guide impeller stirred tank

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Deyin Gu ◽  
Fenghui Zhao ◽  
Xingmin Wang ◽  
Zuohua Liu
Keyword(s):  
Power Consumption ◽  
Solid Particle ◽  
Particle Diameter ◽  
Solid Particles ◽  
Stirred Tank ◽  
Mixing Process ◽  
Solid Holdup ◽  
Aperture Ratio ◽  
Liquid Mixing ◽  
Solid Liquid

Abstract The solid-liquid mixing characteristics in a stirred tank with pitched blade impellers, dislocated impellers, and dislocated guide impellers were investigated through using CFD simulation. The effects of impeller speed, impeller type, aperture ratio, aperture length, solid particle diameter and initial solid holdup on the homogeneity degree in the solid-liquid mixing process were investigated. As expected, the solid particle suspension quality was increased with an increase in impeller speed. The dislocated impeller could reduce the accumulation of solid particles and improve the cloud height compared with pitched blade impeller under the same power consumption. The dislocated guide impeller could enhance the solid particles suspension quality on the basis of dislocated impeller, and the optimum aperture ratio and aperture length of dislocated guide impeller were 12.25% and 7 mm, respectively, in the solid-liquid mixing process. Smaller solid particle diameter and lower initial solid holdup led to higher homogeneity degree of solid-liquid mixing system. The dislocated guide impeller could increase solid particle integrated velocity and enhance turbulent intensity of solid-liquid two-phase compared with pitched blade impeller and dislocated impeller under the same power consumption.

scholarly journals Development of an unresolved CFD–DEM model for the flow of viscous suspensions and its application to solid–liquid mixing

2016 ◽  
Vol 318 ◽  
pp. 201-221 ◽  
Author(s):  
Bruno Blais ◽  
Manon Lassaigne ◽  
Christoph Goniva ◽  
Louis Fradette ◽  
François Bertrand
Keyword(s):  
Liquid Mixing ◽  
Solid Liquid ◽  
Dem Model

scholarly journals Solid-liquid Mixing in a Stirred Vessel

2014 ◽  
Vol 28 (4) ◽  
pp. 437-443 ◽  
Author(s):  
Ryuta MISUMI ◽  
Kazuhiko NISHI ◽  
Meguru KAMINOYAMA
Keyword(s):  
Stirred Vessel ◽  
Liquid Mixing ◽  
Solid Liquid

scholarly journals Scale-Up of Solid-Liquid Mixing Based on Constant Power/Volume and Equal Blend Time Using VisiMix Simulation

2018 ◽  
Vol 187 ◽  
pp. 04002
Author(s):  
Megawati ◽  
Bayu Triwibowo ◽  
Karwono ◽  
Waliyuddin Sammadikun ◽  
Rofiatun Musfiroh
Keyword(s):  
Solid Phase ◽  
Scale Up ◽  
Solid Particles ◽  
Liquid Mixing ◽  
Liquid Suspension ◽  
Two Parameters ◽  
Solid Liquid ◽  
Tank Geometry ◽  
Impeller Geometry

Mixing is one of the important process in many areas of chemical industries, for instance pharmaceutical, drug, ink, paint and other industries. Solid-liquid suspension is produced for 80% of all mixing industries such as leaching process, crystallization process, catalytic reactions, precipitation, coagulation, dissolution and other applications. Two main objectives in solid-liquid mixing namely, avoid settling of solid particles on the tank bottom and ensure the solid particles are uniformly distributed. Many factors that can affect the quality of solid-liquid mixing, they are tank geometry, impeller geometry and speed, baffles, viscosity and density of media. Scale-up of the process is important to conduct before produce it on commercial scale. Two parameters for scale-up solid-liquid mixing are equal blend time and power per volume. Before scaling up the process to industrial scale, an engineer must know the condition of the mixture between both of two. VisiMix can simulating scale-up of solid-liquid mixing in order to know the phenomena inside the tank without conducting a large number of experiments and cheaper. The simulation start from keep the ratio of impeller to tank diameter remains constant, then change the condition operation of mixing. In this paper, power per volume parameter is more recommended as a result of the degree of uniformity of solid phase in liquid.

Monitoring and Scale-Up of Static Electrification during Solid-Liquid Mixing.

2003 ◽  
Vol 36 (12) ◽  
pp. 1464-1469 ◽  
Author(s):  
Satoru Watano ◽  
Tatsuo Kurooka ◽  
Yoshinori Okahashi ◽  
Naohiko Kinboshi ◽  
Teruo Suzuki
Keyword(s):  
Scale Up ◽  
Static Electrification ◽  
Liquid Mixing ◽  
Solid Liquid

scholarly journals Characteristics of Liquid Mixing in Solid-Liquid Two-Phase Flow through a Horizontal Rotary Column.

1993 ◽  
Vol 19 (1) ◽  
pp. 106-113
Author(s):  
Yoshihiko Honda ◽  
Hiroshi Aoyama ◽  
Kiyotaka Okamoto ◽  
Seiji Kurosawa ◽  
Hiroshi Takahashi
Keyword(s):  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Liquid Mixing ◽  
Flow Through ◽  
Solid Liquid
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