Solid-liquid mixing performance in a stirred tank with a double punched rigid-flexible impeller coupled with a chaotic motor

2017 ◽  
Vol 118 ◽  
pp. 37-46 ◽  
Author(s):  
Deyin Gu ◽  
Zuohua Liu ◽  
Chuanlin Xu ◽  
Jun Li ◽  
Changyuan Tao ◽  
...  
Keyword(s):  
Stirred Tank ◽  
Mixing Performance ◽  
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 Particle-resolved PIV experiments of solid-liquid mixing in a turbulent stirred tank

AIChE Journal ◽  
2017 ◽  
Vol 64 (1) ◽  
pp. 389-402 ◽  
Author(s):  
Genghong Li ◽  
Zhengming Gao ◽  
Zhipeng Li ◽  
Jiawei Wang ◽  
J. J. Derksen
Keyword(s):  
Stirred Tank ◽  
Liquid Mixing ◽  
Solid Liquid

scholarly journals Solid-Liquid Mixing In Agitated Tanks : Experimental And CFD Analysis

2021 ◽  
Author(s):  
Seyed. Hosseini
Keyword(s):  
Suspension Polymerization ◽  
Fluid Dynamic ◽  
Impeller Speed ◽  
Cfd Analysis ◽  
Mixing Performance ◽  
Solid Density ◽  
Liquid Mixing ◽  
Solid Liquid ◽  
Multiple Reference ◽  
Good Agreement

Solid-liquid mixing plays a significant role in crystallization, suspension polymerization, leaching, solid-catalyzed reaction and adsorption. In this study, a computational fluid dynamic (CFD) model was developed for solid-liquid mixing in a cylindrical tank equipped with a top-entering impeller. The multiple reference frame (MRF) technique, k-ε model and Eulerian-Eulerian approach were employed to simulate the impeller rotation, turbulent flow and multiphase flow, respectively. The effects of impeller speed, solid concentration, particle size, solid density and impeller clearance on the mixing performance of four different impellers (A310, marine propeller, pitched blad turbine and A320) were investigated. The CFD results were in good agreement with experimental data measured using electrical resistance tomography (ERT). In order to investigate the mixing quality in this study, the impeller speed required for maximum homogeneity, clouding height, and just-suspended impeller speed were investigated.

scholarly journals Solid-Liquid Mixing In Agitated Tanks : Experimental And CFD Analysis

2021 ◽  
Author(s):  
Seyed. Hosseini
Keyword(s):  
Suspension Polymerization ◽  
Fluid Dynamic ◽  
Impeller Speed ◽  
Cfd Analysis ◽  
Mixing Performance ◽  
Solid Density ◽  
Liquid Mixing ◽  
Solid Liquid ◽  
Multiple Reference ◽  
Good Agreement

Solid-liquid mixing plays a significant role in crystallization, suspension polymerization, leaching, solid-catalyzed reaction and adsorption. In this study, a computational fluid dynamic (CFD) model was developed for solid-liquid mixing in a cylindrical tank equipped with a top-entering impeller. The multiple reference frame (MRF) technique, k-ε model and Eulerian-Eulerian approach were employed to simulate the impeller rotation, turbulent flow and multiphase flow, respectively. The effects of impeller speed, solid concentration, particle size, solid density and impeller clearance on the mixing performance of four different impellers (A310, marine propeller, pitched blad turbine and A320) were investigated. The CFD results were in good agreement with experimental data measured using electrical resistance tomography (ERT). In order to investigate the mixing quality in this study, the impeller speed required for maximum homogeneity, clouding height, and just-suspended impeller speed were investigated.

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