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首页> 外文期刊>Journal of food engineering >Controlling food powder deposition in spray dryers: Wall surface energy manipulation as an alternative
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Controlling food powder deposition in spray dryers: Wall surface energy manipulation as an alternative

机译：控制喷雾干燥机中食物粉的沉积：壁面能量控制作为替代

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摘要

A recent recommendation to control deposition in spray drying is to manipulate the wall surface energy in order to reduce the formation of particle-wall liquid bridges. It was recently demonstrated that this is applicable for 'rubbery' particle-wall contacts at relatively low wall temperatures. In this work, experimental investigation was carried out at quasi-steady and relatively elevated wall temperatures to better represent industrial operation of such dryers. Deposition fluxes were collected using Teflon and stainless steel plates. Results indicated that lower wall surface energy does reduce the deposition of amorphous particles, further illustrating the applicability of this approach in industrial condition. This advantage is even more pronounced for deposition of droplets. Utilizing an air operated tester, it was found that wall surface energy only affects the tendency for deposits to detach within certain operation 'window' limits. Such analysis will be critical in evaluating the application of having a less 'sticky' wall.
机译：在喷雾干燥中控制沉积的最新建议是控制壁表面能，以减少颗粒壁液桥的形成。最近证明，这适用于壁温较低时的“橡胶”颗粒-壁接触。在这项工作中，在准稳定和相对较高的壁温下进行了实验研究，以更好地代表此类干燥机的工业运行。使用聚四氟乙烯和不锈钢板收集沉积助焊剂。结果表明较低的壁表面能确实减少了无定形颗粒的沉积，进一步说明了该方法在工业条件下的适用性。对于液滴的沉积，该优势甚至更加明显。利用气动测试仪，发现壁表面能仅影响沉积物在特定操作“窗口”范围内脱离的趋势。这样的分析对于评估具有较小“粘性”壁的应用至关重要。

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  • 来源
    《Journal of food engineering》 |2009年第2期|192-198|共7页
  • 作者

    M.W. Woo; W.R.W. Daud; S.M. Tasirin; M.Z.M. Talib;

  • 作者单位

    Department of Chemical and Process Engineering, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;

    Department of Chemical and Process Engineering, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;

    Department of Chemical and Process Engineering, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;

    Department of Chemical and Process Engineering, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;

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

    spray drying; deposition; amorphous particles; wall surface energy;

    机译：喷雾干燥沉积无定形颗粒;壁面能;

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