| 基于虚拟撞击原理的固定源PM10/PM2.5采样器的研制 |
| |
| 引用本文： | 蒋靖坤,邓建国,段雷,张强,李振,陈小彤,李兴华,郝吉明.基于虚拟撞击原理的固定源PM10/PM2.5采样器的研制[J].环境科学,2014,35(10):3639-3643. |
| |
| 作者姓名： | 蒋靖坤 邓建国 段雷 张强 李振 陈小彤 李兴华 郝吉明 |
| |
| 作者单位： | 清华大学环境学院, 北京 100084;国家环境保护大气复合污染来源与控制重点实验室, 北京 100084;清华大学环境学院, 北京 100084;清华大学环境学院, 北京 100084;国家环境保护大气复合污染来源与控制重点实验室, 北京 100084;清华大学环境学院, 北京 100084;清华大学环境学院, 北京 100084;清华大学环境学院, 北京 100084;北京航空航天大学化学与环境学院, 北京 100191;清华大学环境学院, 北京 100084;国家环境保护大气复合污染来源与控制重点实验室, 北京 100084 |
| |
| 基金项目： | 国家重点基础研究发展规划（973）项目（2013CB228505）；国家高技术研究发展计划（863）项目（2013AA065101，2013AA065004） |
| |
| 摘 要： | 目前我国尚无固定源PM2.5采样标准方法,现有商业化的固定源PM2.5采样器在使用中存在明显不足,因此本研究开发了一种固定源PM10/PM2.5双级虚拟撞击采样器.经实验室标定,该采样器切割效率曲线优于国际标准ISO 7708:1995对采样器的规定,采样器横截面直径为74 mm,满足我国固定源采样口尺寸要求.采样器既可以安装滤膜,也可以安装滤筒,适用于不同浓度的烟尘采样.虚拟撞击器的切割点与次流所占比值呈负相关,比值减小时,切割点增大.为降低颗粒物损失,虚拟撞击器喷嘴距收口的距离至少应为喷嘴直径的1.5~2倍.
|
| 关 键 词： | 固定污染源 虚拟撞击器 可吸入颗粒物(PM10) 细颗粒物(PM2.5) 切割效率 |
| 收稿时间： | 2014/3/14 0:00:00 |
| 修稿时间： | 2014/4/29 0:00:00 |
Development of a Two Stage Virtual Impactor for Stationary Source PM10 and PM2.5 Sampling |
| |
| JIANG Jing-kun,DENG Jian-guo,DUAN Lei,ZHANG Qiang,LI Zhen,CHEN Xiao-tong,LI Xing-hua and HAO Ji-ming.Development of a Two Stage Virtual Impactor for Stationary Source PM10 and PM2.5 Sampling[J].Chinese Journal of Environmental Science,2014,35(10):3639-3643. |
| |
| Authors: | JIANG Jing-kun DENG Jian-guo DUAN Lei ZHANG Qiang LI Zhen CHEN Xiao-tong LI Xing-hua and HAO Ji-ming |
| |
| Institution: | School of Environment, Tsinghua University, Beijing 100084, China;State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China;School of Environment, Tsinghua University, Beijing 100084, China;School of Environment, Tsinghua University, Beijing 100084, China;State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China;School of Environment, Tsinghua University, Beijing 100084, China;School of Environment, Tsinghua University, Beijing 100084, China;School of Environment, Tsinghua University, Beijing 100084, China;School of Chemistry and Environment, Beihang University, Beijing 100191, China;School of Environment, Tsinghua University, Beijing 100084, China;State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China |
| |
| Abstract: | China does not have a national standard method for stationary source PM10 and PM2.5 sampling. Current commercial PM10/PM2.5 samplers have some limitations when used in China. In this study, we developed a two stage virtual impactor for sampling PM10/PM2.5 from stationary source. Its performance was evaluated using laboratory generated aerosol. Its collection efficiency curve satisfies the requirement of ISO 7708:1995 for PM10/PM2.5 samplers. The diameter of this cylindrical virtual impactor is 74mm, smaller than the diameter of the sampling port in most stationary sources in China. Both filter papers and filter thimbles can be used with this impactor which makes it suitable for both low and high dust concentration sampling. The ratio of the minor flowrate to the total flowrate influences the cutoff size (D50) of the virtual impactor. Reducing this ratio will lead to an increase in D50. The distance from the bottom of the accelerating nozzle to the top of the collecting nozzle should be greater than 1.5-2.0 times the diameter of the accelerating nozzle. |
| |
| Keywords: | stationary source virtual impactor PM10 PM2 5 collection efficiency |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《环境科学》浏览原始摘要信息 |
| 点击此处可从《环境科学》下载免费的PDF全文 |
|
