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Comparison of Axial Flow and Swirling Flow on Particle Pickup in Horizontal Pneumatic Conveying

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  • Yun Ji

    (School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China
    Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University, Qinhuangdao 066004, China)

  • Yating Hao

    (School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)

  • Ning Yi

    (School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)

  • Tianyuan Guan

    (School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)

  • Dianrong Gao

    (School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China
    Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University, Qinhuangdao 066004, China)

  • Yingna Liang

    (School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)

Abstract

Pneumatic conveying is widely used in coal mining. As the lowest conveying velocity of materials, the pickup velocity is the key to the study of gas–solid two-phase flow. In this study, the pickup velocity of pebble particles was experimentally investigated. When the particle size is 3–9 mm, the airflow velocity was found to suitably describe the results as a function of the pickup velocity and have a high correlation. When the swirl number is 0.2, the optimal swirl number was found for which the highest particle pickup ratio was observed. Based on four different methods, namely, visual observation, mass weighing, coefficient of difference analysis, and determination of the peak-average ratio of the pressure drop in the flow field to measure the pickup velocity of the spraying material, the results showed that the accuracy of the particle pickup velocity obtained through visual observation was the lowest, and when the mass–loss rate of the particle was selected as the measurement index of the pickup velocity, the accuracy was the highest. The results will help to realize the long-distance transportation of spraying materials in inclined roadway under the shaft.

Suggested Citation

  • Yun Ji & Yating Hao & Ning Yi & Tianyuan Guan & Dianrong Gao & Yingna Liang, 2022. "Comparison of Axial Flow and Swirling Flow on Particle Pickup in Horizontal Pneumatic Conveying," Energies, MDPI, vol. 15(17), pages 1-18, August.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:17:p:6126-:d:895790
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    References listed on IDEAS

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    1. Liang Cheng & Zhaolong Ge & Jiufu Chen & Hao Ding & Lishuang Zou & Ke Li, 2018. "A Sequential Approach for Integrated Coal and Gas Mining of Closely-Spaced Outburst Coal Seams: Results from a Case Study Including Mine Safety Improvements and Greenhouse Gas Reductions," Energies, MDPI, vol. 11(11), pages 1-16, November.
    2. Philippe Beaulac & Mohamad Issa & Adrian Ilinca & Jean Brousseau, 2022. "Parameters Affecting Dust Collector Efficiency for Pneumatic Conveying: A Review," Energies, MDPI, vol. 15(3), pages 1-23, January.
    3. Slobodan Dudić & Vule Reljić & Dragan Šešlija & Nikolina Dakić & Vladislav Blagojević, 2021. "Improving Energy Efficiency of Flexible Pneumatic Systems," Energies, MDPI, vol. 14(7), pages 1-17, March.
    4. Zetian Zhang & Ru Zhang & Zhiguo Cao & Mingzhong Gao & Yong Zhang & Jing Xie, 2020. "Mechanical Behavior and Permeability Evolution of Coal under Different Mining-Induced Stress Conditions and Gas Pressures," Energies, MDPI, vol. 13(11), pages 1-26, May.
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