气溶胶粒度分布的在线测量实验研究

Experimental Investigation on Online Measurement of Aerosol Particle Size Distribution

随着雾、霾等气溶胶引起环境问题的加剧,对大气气溶胶特性的研究也越来越深入。该文重点研究了光学粒径谱仪在气溶胶粒度分布在线测量上的应用。通过对比3款典型粒径谱仪的测量原理、测量范围、测量精度等特征,选用光学粒径谱仪系列(OPS)是比较适合在线测量自然环境下大气气溶胶粒度分布的。通过一系列对大气气溶胶中典型的固体和液体气溶胶的在线测量实验,发现更换HEPA过滤器对在线测量的结果有影响,而不同采样时长和不同通道区间不会影响OPS对大气气溶胶的在线测量。

With the aggravation of environmental problems caused by aerosols such as fog and haze,the research on the characteristics of atmospheric aerosols has received considerable attention.This paper focuses on the application of optical particle size spectrometer in online measurement of aerosol size distribution.By comparing the measurement principle,measurement range and measurement accuracy of the three typical particle size spectrometers,it was found that optical particle size spectrometer series(OPS)is suitable for online measurement of atmospheric aerosol particle size distribution in natural environments.Through a series of on-line measurements of typical solid and liquid aerosols in atmospheric aerosols,we reveal that the replacement of HEPA filters has an effect on the results of online measurements that are insensitive to the sampling durations and channel intervals.