Circulating jet for enhancing the mass transfer in a gas–liquid stirred tank reactor

Xu, Xiahong; Wang, Lei; Wang, Hualin; Liu, Honglai; Yang, Qiang

doi:10.1002/aic.17392

Cited by 4 publications

(1 citation statement)

References 45 publications

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“…Solid–liquid stirred tanks are widely applied in the field of chemical industry, mineral processing, catalytic and polymerization reactors. The operational efficiency of the reactor depends on the contact between components and the quality of the suspension. − These industrial processes often involve the suspension of relatively small solid particles in fluid media. Small solid particles, owing to their high surface energy, can adsorb water from the surrounding environment onto their surfaces.…”

Section: Introductionmentioning

confidence: 99%

Insights into the Impact of Small Particle Liquid Film on the Spatiotemporal Distribution of Suspension in Stirred Reactors

Chen,

Ouyang,

et al. 2024

Ind. Eng. Chem. Res.

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The liquid film has a significant impact on solid− liquid interactions. There is limited research on the effect of liquid film on the distribution of suspended particles in stirred tanks. This study proposes a drag model incorporating particle liquid film and analyzes the effect of liquid film thickness on solid−liquid mixing. First, the formation mechanism of liquid film on the surface of particles, the influence of liquid film on particle dynamics, and interphase forces were introduced. Second, the accuracy of the modified drag model was validated by comparing predicted solid concentration distribution with experimental data and employed to analyze and study the interaction between fluids and solids. The results indicate that the simulation results obtained by the modified model are consistent with the experimental values, with an average relative error of only 9.82%. Furthermore, the results indicate that under low Reynolds number conditions, the influence of particle liquid film thickness is significant. Under high Reynolds number conditions, the influence of liquid film thickness on particle distribution can be ignored.

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Section: Introductionmentioning

confidence: 99%

Insights into the Impact of Small Particle Liquid Film on the Spatiotemporal Distribution of Suspension in Stirred Reactors

Chen,

Ouyang,

et al. 2024

Ind. Eng. Chem. Res.

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Multi‐shaft stirred reactors mixing efficiency: Rapid characterization strategy based on chaotic attractors

Meng,

Yang,

Wang

et al. 2024

AIChE Journal

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The complex fluid dynamics mechanism of multi‐shaft stirring systems has constrained their application in industrial production. In this work, we have extracted torque signals to correlate power consumption with rotational speeds across single, dual, and triple shaft stirred reactors. Remarkably, the reasons behind the unique linear power consumption‐rotational speed relationship exhibited in triple‐shaft reactor, through the application of Fractional Fourier Transform. Our comparative analysis, through mixing energy, reveals multi‐shaft systems' superiority in energy‐efficient mixing. More importantly, the interaction between impellers and fluid within a reactor is reflected in the evolving of torque chaotic attractors. We have established a novel characterization strategy by fractal dimension of attractors which reflect the reactors' mixing efficiency. By mathematically modeling these attractors, we have demonstrated their potential as a tool for establishing the internal dynamics equations of stirred reactors. This approach offers a new method for evaluating mixing effectiveness and automated control of stirring machinery.

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BubSAM: Bubble segmentation and shape reconstruction based on Segment Anything Model of bubbly flow

Xu,

Feng,

et al. 2024

AIChE Journal

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Accurate detection and analysis of bubble size and shape in bubbly flow are critical to understanding mass and heat transfer processes. Convolutional neural networks have limitations in different bubble images due to their dependence on large amounts of labeled data. A new foundational Segment Anything Model (SAM) recently attracts lots of attention for its zero‐shot segmentation performance. Herein, we developed a novel image processing method named bubSAM, which achieves efficient and accurate bubble segmentation and shape reconstruction based on SAM. The segmentation performance of bubSAM is 30% higher than that of SAM, and its accuracy reaches 90% under different bubbly flow conditions. The accuracy of bubble shape reconstruction (BSR) algorithm in bubSAM is about 30% higher than that of typical ellipse fitting method, thus better restoring the geometric shape of bubbles. BubSAM can provide great support for understanding gas–liquid multiphase flow and design of industrial multiphase reactors.

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Circulating jet for enhancing the mass transfer in a gas–liquid stirred tank reactor

Cited by 4 publications

References 45 publications

Insights into the Impact of Small Particle Liquid Film on the Spatiotemporal Distribution of Suspension in Stirred Reactors

Insights into the Impact of Small Particle Liquid Film on the Spatiotemporal Distribution of Suspension in Stirred Reactors

Multi‐shaft stirred reactors mixing efficiency: Rapid characterization strategy based on chaotic attractors

BubSAM: Bubble segmentation and shape reconstruction based on Segment Anything Model of bubbly flow

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