| 亚微米颗粒湍流团聚特性的实验研究 |
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| 引用本文： | 刘鹤欣,谭厚章,杜勇乐,吕钊敏,萧嘉繁,杨富鑫.亚微米颗粒湍流团聚特性的实验研究[J].工程热物理学报,2020(3):763-770. |
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| 作者姓名： | 刘鹤欣 谭厚章 杜勇乐 吕钊敏 萧嘉繁 杨富鑫 |
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| 作者单位： | 西安交通大学热流科学与工程教育部重点实验室 |
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| 基金项目： | 国家重点研发计划资助项目(No.2016YFB0601504)。 |
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| 摘 要： | 燃煤电厂亚微米颗粒物排放是造成大气环境污染和影响人体健康的重要因素。本文搭建亚微米颗粒湍流团聚实验平台,通过场发射扫描电镜(FESEM)对亚微米颗粒的团聚形貌进行微观表征以及扫描电迁移率粒径谱仪(SMPS)对亚微米颗粒团聚前后的粒径分布特性进行宏观测量。结果表明:亚微米颗粒湍流团聚形成多分叉颗粒树聚团结构,进口流速为0.8?5.3m/s条件下,PM1和PM0.1的脱除效率分别为5.6%?18.6%和7.0%?21.4%,且PM1和PM0.1的脱除效率曲线随速度变化呈现二次函数规律。
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| 关 键 词： | 湍流团聚 亚微米颗粒 燃煤电厂 扰流元件 |
Experimental Study on the Characteristics of Turbulent Agglomeration for Submicron Particulates |
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| LIU He-Xin,TAN Hou-Zhang,DU Yong-Le,LV Zhao-Min,XIAO Jia-Fan,YANG Fu-Xin.Experimental Study on the Characteristics of Turbulent Agglomeration for Submicron Particulates[J].Journal of Engineering Thermophysics,2020(3):763-770. |
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| Authors: | LIU He-Xin TAN Hou-Zhang DU Yong-Le LV Zhao-Min XIAO Jia-Fan YANG Fu-Xin |
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| Institution: | (MOE Key Laboratory of Thermo-Fluid Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China) |
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| Abstract: | Submicron particulate emissions from coal-fired power plants play an important role in causing atmospheric pollution and affecting human health.In this work,an experimental platform of turbulent agglomeration for submicron particulates was built.The microscopic morphology of the turbulent agglomeration was measured through Field Emission Electron Microscopy(FESEM),while the particle size distributions before and after the agglomeration were measured through Scanning Mobility Particle Sizes(SMPS).The results show that the submicron particulates form a multi-branched particle tree structure in the process of the turbulent agglomeration.At the inlet velocity of 0.8~5.3 m/s,the removal efficiencies of PM1 and PM0.1 are 5.6%~18.6% and 7.0%~21.4%,respectively.The removal efficiency curve presents quadratic function law with the change of the inlet velocity. |
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| Keywords: | turbulent agglomeration submicron particulate coal-fired power plant disturbing structure |
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