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Effect of Particle Penetration Depth on Solid/liquid Mass Transfer Rate by Particle Blowing Technique

机译：吹气技术对颗粒渗透深度对固液传质速率的影响

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摘要

In this study, cold model experiments on particle blowing were carried out to clarify the effect of particle penetration depth on solid/liquid mass transfer rate. A comparison of penetration depth obtained by experiment and CFD calculation using commercially available software was also carried out. The penetration depth was measured by a visual observation whereas the solid/liquid mass transfer rate was obtained from the ion-exchanged reaction between Na~+ on pearlite particles and H~+ in HCI aqueous solution. Both of the penetration depth and solid/liquid mass transfer rate increased with the increase in particle feed rate and top blowing gas flow rate, and the decrease in lance height and particle diameter. The following non-dimensional equation of particle penetration depth was obtained by several non-dimensional numbers: Rep = 187Fr~(0.673)We~(0.199)(ρ_1-ρ_p/ρ_1)~(0.447) where, Rep: particle Reynolds number, Fr. Froude number, We: Weber number, ρ_1 and ρ_p: liquid and particle densities (kg/m~3), respectively. A good agreement was confirmed by the experiment. The particle penetration depth was also calculated by a combination of VOF and DEM model and it was in good agreement with the experiment. The solid/liquid mass transfer coefficient calculated by the CFD simulation and Froessling equation increased with the increase in top blowing gas flow rate, particle feed rate and penetration depth. The solid/liquid interfacial area was expressed by a function of penetration depth.
机译：在这项研究中，进行了吹塑的冷模型实验，以弄清颗粒渗透深度对固/液传质速率的影响。还对通过实验和使用市售软件进行的CFD计算获得的穿透深度进行了比较。通过目测观察穿透深度，而固/液传质速率是由珠光体颗粒上的Na〜+与HCl水溶液中的H〜+之间的离子交换反应获得的。渗透深度和固/液传质速率都随着颗粒进料速率和顶部吹入气体流速的增加以及喷枪高度和粒径的减小而增加。以下粒子渗透深度的无量纲方程由几个无量纲数获得：Rep = 187Fr〜（0.673）We〜（0.199）（ρ_1-ρ_p/ρ_1）〜（0.447）其中，Rep：粒子雷诺数，神父弗洛德数，我们：韦伯数，ρ_1和ρ_p：分别为液体和颗粒密度（kg / m〜3）。实验证实了良好的一致性。结合VOF和DEM模型计算了颗粒渗透深度，与实验结果吻合良好。 CFD模拟和Froessling方程计算出的固/液传质系数随着顶部吹气流量，颗粒进料速率和穿透深度的增加而增加。固/液界面面积由渗透深度的函数表示。

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  • 来源
    《ISIJ international》 |2017年第11期|1902-1910|共9页
  • 作者

    Takahiro OKUNO; Md. Azhar UDDIN; Yoshiei KATO; Sang Beom LEE; Yong Hwan KIM;

  • 作者单位

    Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University. Now at Okayama Gas Co., Ltd., 1-1 Sakurabashi, 2-chome, Naka-ku, Okayama, 703-8285 Japan.;

    Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University, 1-1 Tsushima-naka, 3-chome, Kita-ku, Okayama, 700-8530 Japan;

    Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University, 1-1 Tsushima-naka, 3-chome, Kita-ku, Okayama, 700-8530 Japan;

    Technical Research Laboratories, Pohang Research Lab., POSCO, Pohang P.O. Box 36, 1, Goedong-dong, Nam-gu, Pohang, Gyeongbuk, 790-300 Korea;

    Technical Research Laboratories, Pohang Research Lab., POSCO, Pohang P.O. Box 36, 1, Goedong-dong, Nam-gu, Pohang, Gyeongbuk, 790-300 Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    solid/liquid mass transfer; penetration depth; particle blowing; powder blowing;

    机译：固/液传质穿透深度吹尘吹粉;

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