进气流量对PM<sub>2.5</sub>切割器捕集效率的影响

doi:10.3969/j.issn.1000-1158.2021.04.20

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摘要市面上常见的切割器均规定了固定的工作流量,当进入切割器的气流量不符合其标准工作流量时,就会带来捕集效率的偏差。通过搭建基于静态箱法的切割器捕集效率评价系统,对国产、进口的旋风式PM2.5切割器的捕集效率进行了评价,研究了切割器标准工作流量及该值的70%、80%、120%、130%作为抽气流量时对PM2.5切割器的捕集效率的影响。实验结果表明,PM2.5切割器的Da50会随着进气流量的改变呈现相反的变化趋势,Da50值分布范围为标准工作流量下该值的140%至80%;但捕集效率曲线的几何标准偏差在不同进气流量下几乎不变,对比标准工作流量下的偏移量不超过0.9%。该研究结果对于进一步规范切割器的制造及使用提供参考。

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	刘佳琪
	张国城
	赵晓宁
	吴丹
	荆文杰

关键词 ：计量学, PM2.5, 切割器, 进气流量, 捕集效率, 切割粒径

Abstract：Generally, the commercial cutters have a fixed working flow rate range, if the actual gas flow rate into the cutter is not in this fixed range, deviation of the capture efficiency might be occurred. In this study, by using the cutter capture efficiency evaluation system based on static box method, the capture efficiency for two domestic and imported PM2.5 cutters were evaluated. The influences of the standard working flow of the cutter and the flow of 70%, 80%, 120% and 130% on the trapping efficiency of the PM2.5 cutter were studied. The results showed that with the change of inlet flow rate, the change trend of Da50 is opposite. The distribution range of Da50 is 140% to 80% of the value under standard operating flow. The geometrical standard deviations of the penetrating curve staynearly unchanged, while the change is not more than 0.9% compared with the value under standard operating flow. This study has scientific value for further regulating the manufacture and the usage of cutter.

Key words： metrology PM2.5 cyclone inlet flow collection efficiency cut diameter

收稿日期: 2020-05-19 发布日期: 2021-04-20

PACS:

TB99

基金资助:国家质量基础的共性技术研究与应用国家重点研发计划(2017YFF0205504);中国博士后科学基金(2019M660538)

通讯作者: 张国城(1980-),男,福建永春人,北京市计量检测科学研究院教授级高工,主要从事化学分析与环境监测仪器的计量检测研究。Email: zhanggc@bjjl.cn E-mail: zhanggc@bjjl.cn

作者简介: 刘佳琪(1990-),女,河北邯郸人,北京市计量检测科学研究院工程师,主要研究颗粒物相关环境监测仪器。Email: liujq@bjjl.cn

引用本文:

刘佳琪,张国城,赵晓宁,吴丹,荆文杰. 进气流量对PM_2.5切割器捕集效率的影响[J]. 计量学报, 2021, 42(4): 532-536.
LIU Jia-qi,ZHANG Guo-cheng,ZHAO Xiao-ning,WU Dan,JING Wen-jie. The Influence of Air Inlet Flow Rate on the Capture Efficiency of PM2.5 Cutter. Acta Metrologica Sinica, 2021, 42(4): 532-536.

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