摘要
为了评价市面上不同工作流量的切割器,本研究搭建了一套基于静态箱法的切割器捕集效率评价系统,可调节切割器的采样流量,结合空气动力学粒径谱仪对不同工作流量的切割器进行捕集效率测量.通过使用8种粒径的单分散聚苯乙烯微球,对多个品牌的工作流量为2、3及16.67 L·min^(-1)的PM_(1)、PM_(2.5)及PM_(10)切割器进行了评价,得到其捕集效率为50%时的空气动力学粒径分别为1.12、2.52和10.39μm(品牌一);2.69和10.41μm(品牌二);2.56、10.43μm(型号Dust trak);1.04、2.51μm(型号VSCC).本研究对于评价不同流量、不同原理的切割器的性能、提高颗粒物监测结果的准确性具有一定的科学意义.
In order to evaluate particulate matter(PM)cutters with different working flow rates on the market,this study developed a system to evaluate the cutters′capture efficiency based on static box method.This system can adjust the sampling flow rate and measure the corresponding capture efficiency with an aerodynamic particle spectrometer.Utilizing monodispersed polystyrene microspheres,we evaluated PM_(1) cutters,PM_(2.5) cutters and PM_(10) cutters made by several commercial brands,which have working flow rates of 2,3 and 16.67 L·min^(-1),respectively.The aerodynamic diameters of particles at 50%capture efficiency are 1.12,2.52 and 10.39μm for the first brand;2.69 and 10.41μm for the second brand;2.56 and 10.43μm for Dust trak;1.04 and 2.51μm for VSCC.This research has scientific significance for evaluating the performance of PM cutters with different flow rates or different measurement principles,and improving the accuracy of PM monitoring results.
作者
刘佳琪
张国城
赵晓宁
吴丹
沈上圯
荆文杰
LIU Jiaqi;ZHANG Guocheng;ZHAO Xiaoning;WU Dan;SHEN Shangyi;JING Wenjie(Beijing Institute of Metrology,Beijing 100029)
出处
《环境科学学报》
CAS
CSCD
北大核心
2021年第7期2640-2646,共7页
Acta Scientiae Circumstantiae
基金
中国博士后科学基金面上资助(No.2019M660538)
国家质量基础的共性技术研究与应用国家重点研发计划(No.2017YFF0205504)。
关键词
切割器
工作流量
捕集效率
空气动力学
性能评价
cutter
working flow
collection efficiency
aerodynamics
performance evaluation
