Study on the solid–liquid suspension behavior in a tank stirred by the long-short blades impeller

2021 ◽  
Author(s):  
Zewen Chen ◽  
Yongjun Wu ◽  
Jian Wang ◽  
Peicheng Luo
Keyword(s):  
Liquid Suspension ◽  
Solid Liquid

scholarly journals Mathematical modeling and experimental study on solid–liquid suspension separation in ultrasonic standing wave field

2021 ◽  
pp. 146134842110229
Author(s):  
Yajing Wang ◽  
Liqun Wu ◽  
Yaxing Wang ◽  
Yafei Fan
Keyword(s):  
Standing Wave ◽  
Sound Pressure ◽  
Acoustic Radiation ◽  
Sound Field ◽  
Radiation Force ◽  
High Energy ◽  
Factors Affecting ◽  
Liquid Suspension ◽  
Ultrasonic Standing Wave ◽  
Solid Liquid

A new method of removing waste chips is proposed by focusing on the key factors affecting the processing quality and efficiency of high energy beams. Firstly, a mathematical model has been established to provide the theoretical basis for the separation of solid–liquid suspension under ultrasonic standing wave. Secondly, the distribution of sound field with and without droplet has been simulated. Thirdly, the deformation and movement of droplets are simulated and tested. It is found that the sound pressure around the droplet is greater than the sound pressure in the droplet, which can promote the separation of droplets and provide theoretical support for the ultrasonic suspension separation of droplet; under the interaction of acoustic radiation force, surface tension, adhesion, and static pressure, the droplet is deformed so that the gas fluid around the droplet is concentrated in the center to achieve droplet separation, and the droplet just as a flat ball with a central sag is stably suspended in the acoustic wave node.

Eulerian Simulation of Dense Solid-Liquid Suspension in Multi-Stage Stirred Vessel.

2001 ◽  
Vol 34 (5) ◽  
pp. 585-594 ◽  
Author(s):  
HELENE BARRUE ◽  
JOËL BERTRAND ◽  
BENOÎT CRISTOL ◽  
CATHERINE XUEREB
Keyword(s):  
Stirred Vessel ◽  
Liquid Suspension ◽  
Multi Stage ◽  
Solid Liquid

Solid-liquid suspension of microcarriers in stirred tank bioreactor – Experimental and numerical analysis

2018 ◽  
Vol 180 ◽  
pp. 52-63 ◽  
Author(s):  
Angélique Delafosse ◽  
Céline Loubière ◽  
Sébastien Calvo ◽  
Dominique Toye ◽  
Eric Olmos
Keyword(s):  
Numerical Analysis ◽  
Stirred Tank ◽  
Stirred Tank Bioreactor ◽  
Liquid Suspension ◽  
Solid Liquid

scholarly journals A New Model for Estimation of Just-Suspension Speed Based on Lift Force for Solid–Liquid Suspension in a Stirred Tank

2016 ◽  
Vol 49 (8) ◽  
pp. 737-746 ◽  
Author(s):  
Zauyah Zamzam ◽  
Shiro Yoshikawa ◽  
Shinichi Ookawara ◽  
Yoshikazu Kato
Keyword(s):  
Lift Force ◽  
Stirred Tank ◽  
New Model ◽  
Liquid Suspension ◽  
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.

Miniaturized Tubular Cooling Crystallizer With Solid-Liquid Flow for Process Development

2018 ◽  
Author(s):  
Mira Schmalenberg ◽  
Lukas Hohmann ◽  
Norbert Kockmann
Keyword(s):  
Residence Time ◽  
Mass Flow ◽  
Modular Design ◽  
Process Development ◽  
Test System ◽  
Successful Operation ◽  
Liquid Suspension ◽  
Axial Temperature ◽  
Inner Diameter ◽  
Solid Liquid

Production of fine chemicals and pharmaceuticals often includes solid-liquid suspension flow. For continuous cooling a tubular crystallizer was designed based on the coiled flow inverter (CFI) concept, providing a narrow residence time distribution (RTD) of the liquid phase. Counter-current cooling allows for a smooth adjustment of the axial temperature profile. Successful operation of up to 50 g min−1 in a prototype with 4 mm inner diameter was scaled down to a tube-in-tube CFI crystallizer (CFIC) with an inner diameter of 1.6 mm and varying length from 7.8 to 54.6 m. This leads to a significantly lower consumption of chemicals in process development with lower total mass flow rates of 15–20 g min−1. Due to modular design, mean residence time (3.8 to 6.9 min) and mean cooling rate (0.6 to 1.4 K·min−1) were varied at constant mass flow rate. Crystallization growth rate and yield are analyzed with the L-alanine/water test system and seed crystals of 125–180 μm.

Study on Mechanism of Strengthened Vortex Diffusion for a Punched Agitator

2011 ◽  
Vol 221 ◽  
pp. 694-700 ◽  
Author(s):  
Jian Guo Chen ◽  
De Yu Luan ◽  
Xiao Chen Zhu
Keyword(s):  
Energy Dissipation ◽  
Simple Structure ◽  
Projection Area ◽  
Mixing Efficiency ◽  
Broad Application ◽  
Liquid Suspension ◽  
Vortex Theory ◽  
Solid Liquid ◽  
Vortex Diffusion ◽  
Application Prospects

The mixing mechanism of a punched agitator used in solid-liquid suspension system was studied basing on the enstrophy and energy dissipation of the vortex theory. The effects of the configuration parameters on stirring performance were discussed. The results show that efflux from such punched agitator with simple structure can not only strengthen vortex diffusion, but also reduce the power consumption by diminishing the projection area in the direction which the paddles round. Obviously, this is beneficial to lower critical suspension velocity and promote mixing efficiency in stirring tank. It is indicated that the punched agitator owning quite broad application prospects.

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