Experimental and numerical study of the effect of particle size distribution on hydrocyclone classification

Zhao, Qiang; Cui, Baoyu; Ji, Ankun; Song, Tao; Shen, Yanbai

doi:10.1016/j.apt.2024.104398

Advanced Powder Technology

2024

DOI: 10.1016/j.apt.2024.104398

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Experimental and numerical study of the effect of particle size distribution on hydrocyclone classification

Qiang Zhao,

Baoyu Cui,

Ankun Ji

et al.

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2024

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Cited by 4 publications

References 47 publications

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Pore tortuosity and permeability of particulate composites with random packing superovoidal particles

Li,

Qing,

Chen

et al. 2024

Powder Technology

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Pore tortuosity and permeability of particulate composites with random packing superovoidal particles

Li,

Qing,

Chen

et al. 2024

Powder Technology

View full text Add to dashboard Cite

Resolved Simulation for the Prediction of Classification in Decanter Centrifuges

Baust,

Nirschl,

Gleiß

2024

ChemEngineering

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Solid–liquid separation plays a decisive role in various industrial applications particularly in the treatment and purification of suspensions. Solid bowl centrifuges, such as the decanter centrifuge, are commonly employed in these processes as they operate continuously and enable high throughputs with short processing times. However, predicting the separation performance of solid bowl centrifuges proves to be challenging due to dynamic phenomena within the apparatus, such as particle settling, sediment build-up, consolidation and sediment transport. In practice, design considerations and the dimensioning of the apparatus rely on analytical models and the manufacturer’s expertise. Computational Fluid Dynamics (CFD) offers a way to deepen our understanding of these devices by allowing detailed examination of flow phenomena and their influence on the separation processes. This study utilizes the open-source software OpenFOAM to simulate multiphase flow in a laboratory-scale decanter centrifuge, solving individual transport equations for each particle size class. The basis is the characterization of the material through targeted laboratory experiments to derive material functions that describe the hindered settling and the sediment consolidation. Furthermore, experiments on a laboratory decanter served as validation. The results demonstrate the solver’s capability to replicate clarification and classification within the apparatus. Furthermore, the solver supports the definition of geometries tailored to specific separation tasks. This research demonstrates the potential of CFD for a better understanding of complex centrifuge processes and for optimizing their design to improve performance.

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Novel Efficiency Calculation Model Based on Fine Particle Tracking Behavior

Liu,

Chen,

Cui

et al. 2024

Processes

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The underflow entrainment of fine particles occurs during the hydrocyclone separation process, resulting in a “fishhook” effect on grade efficiency. Traditional efficiency models fail to address this phenomenon. This study examines the tracking behavior of fine particles, using variations in centrifugal settling velocity to characterize separation performance. The effect of this behavior on particle separation is quantified through a tracking coefficient for small particles and an entrainment coefficient for large particles, together forming a novel efficiency calculation model. The experimental research shows that the new model is applicable for the efficiency calculation of particles with different shapes, and can calculate grade efficiency curves with fishhook segments. By comparing with the existing research results, the accuracy and universality of the new model have been demonstrated. This model facilitates the accurate computation of grade efficiency curves, thereby significantly enhancing the precision of efficiency calculations, which provides guidance for the design and selection of hydrocyclones.

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Experimental and numerical study of the effect of particle size distribution on hydrocyclone classification

Cited by 4 publications

References 47 publications

Pore tortuosity and permeability of particulate composites with random packing superovoidal particles

Pore tortuosity and permeability of particulate composites with random packing superovoidal particles

Resolved Simulation for the Prediction of Classification in Decanter Centrifuges

Novel Efficiency Calculation Model Based on Fine Particle Tracking Behavior

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