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Using 3D LIF to investigate and improve performance of a multichamber ozone contactor

机译:使用3D LIF研究和改善多室臭氧接触器的性能

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摘要

Three-dimensional laser-induced fluorescence (3D LIF) was applied to visualize and quantitatively analyze hydrodynamics and mixing in a multichamber ozone contactor, the most widely used design for water disinfection. Results suggested that mixing was characterized by extensive short-circuiting between chambers, internal recirculation within the chambers, and dead zones at the chamber centers. Because of these nonideal mixing behaviors, the hydrodynamics in the entire reactor showed greater dispersion than a series of completely mixed reactors. These flow patterns could be diminished by decreasing the channel width, whereas the effects of the flow rate and baffle gap were negligible within the range investigated. Accordingly, reactive transport model simulations suggested that overall reactor performance could be significantly improved by preventing these flow behaviors. The 3D LIF technique developed and presented in this study is expected to provide a novel tool for reactor diagnosis, retrofitting to improve performance, and new reactor design.
机译:三维激光诱导荧光(3D LIF)用于可视化和定量分析多室臭氧接触器中的水动力学和混合,这是水消毒使用最广泛的设计。结果表明,混合的特征是腔室之间发生广泛的短路,腔室内部的内部再循环以及腔室中央的死区。由于这些非理想的混合行为,整个反应器中的流体力学表现出比一系列完全混合的反应器更大的分散性。通过减小通道宽度可以减小这些流型,而在所研究的范围内,流速和挡板间隙的影响可忽略不计。因此,反应性运输模型模拟表明,通过防止这些流动行为,可以显着提高反应堆的整体性能。这项研究中开发和提出的3D LIF技术有望为反应堆诊断,改造以提高性能和设计新的反应堆提供一种新颖的工具。

著录项

  • 来源
    《American Water Works Association Journal》 |2010年第10期|p.61-70|共10页
  • 作者单位

    Department of Civil and Environmental Engineering, Dankook University, in Yongin-si, South Korea;

    rnUS Environmental Protection Agency in Cincinnati;

    rnSchool of Civil and Environmental Engineering, Georgia Institute of Technology, 200 Bobby Dodd Way, Atlanta, GA 30332-0373;

    rnSchool of Civil and Environmental Engineering, Georgia Institute of Technology, 200 Bobby Dodd Way, Atlanta, GA 30332-0373;

  • 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
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