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首页> 外文期刊>Environmental Science & Technology >Sky-Scattered Solar Radiation Based Plume Transmissivity Measurement to Quantify Soot Emissions from Flares
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Sky-Scattered Solar Radiation Based Plume Transmissivity Measurement to Quantify Soot Emissions from Flares

机译：基于天空散射的太阳辐射羽流透射率测量，以量化火炬烟尘排放

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摘要

For gas flares typical of the upstream energy industry and similar point sources, most current methods for characterizing soot emissions are based on plume opacity rather than a quantitative measure of mass flux. The absence of more quantitative approaches is indicative of the inherent complexity of soot and the difficulties in characterizing emissions in an unbounded plume. A new experimental approach has been developed for the investigation of soot emissions in industrial plumes. Referred to as sky-LOSA, the diagnostic permits evaluation of 2D spatially resolved monochromatic skylight transmissivity data over the width of a plume, where skylight intensities behind the plume are obtained via an interpolation algorithm. By using Rayleigh-Debye-Gans Fractal Aggregate theory to relate transmissivity data to soot concentrations, and with knowledge of the velocity of the plume, it is possible to quantify mass flow rates of soot in a plume. Experiments on an unconfined lab-scale soot plume were used to support a detailed uncertainty analysis under a wide range of conditions and to estimate sensitivity limits of the technique. Results suggest field measurements of soot emission from flare plumes should be possible with overall uncertainties of less than 32%. This represents a significant advancement over existing techniques based on opacity measurements.
机译：对于上游能源行业典型的火炬燃烧和类似的点源，表征烟灰排放的大多数当前方法是基于烟羽的不透明度，而不是质量通量的定量度量。缺乏更多的定量方法表明了烟尘固有的复杂性以及表征无限制烟羽中排放物的困难。已经开发出一种新的实验方法来研究工业烟尘中的烟尘排放。该诊断程序被称为“天空-LOSA”，它可以评估羽流宽度上的二维空间分辨单色天窗透射率数据，其中通过插值算法获得羽流后的天窗强度。通过使用Rayleigh-Debye-Gans分形集合理论将透射率数据与烟尘浓度相关联，并通过了解烟流的速度，可以量化烟流中烟尘的质量流量。在无限制的实验室规模烟尘羽流上进行的实验用于支持在各种条件下进行的详细不确定性分析，并估算该技术的灵敏度极限。结果表明，应有可能对火炬烟气中的烟尘排放进行现场测量，总体不确定度应低于32％。这代表了基于不透明度测量的现有技术的重大进步。

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  • 来源
    《Environmental Science & Technology》 |2010年第21期|p.8196-8202|共7页
  • 作者

    MATTHEW R. JOHNSON; ROBIN W. DEVILLERS; CHEN YANG; KEVIN A. THOMSON;

  • 作者单位

    Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, ON, Canada;

    rnInstitute for Chemical Process and Environmental Technology, National Research Council, Ottawa, ON, Canada;

    rnDepartment of Mechanical and Aerospace Engineering, Carleton University, Ottawa, ON, Canada;

    rnInstitute for Chemical Process and Environmental Technology, National Research Council, Ottawa, ON, Canada;

  • 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);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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