不同类型颗粒物切割器采样流量与切割粒径关系研究  

Study on the Relationship Between Sampling Flow Rate and Cut Size of Different Types of Particulate Matter Cutters

作　　者：田莹 张国城 刘佳琪 沈上圯 吴丹 潘一廷 荆文杰 TIAN Ying;ZHANG Guo-cheng;LIU Jia-qi;SHEN Shang-yi;WU Dan;PAN Yi-ting;JING Wen-jie(National Quality Supervision and Inspection Center for Ecological&Environmental Products,Beijing Institute of Metrology,Beijing 100029,China)

机构地区：[1]北京市计量检测科学研究院,国家生态环境监测治理产品质量监督检验中心,北京100029

出　　处：《计量学报》2023年第9期1467-1472,共6页Acta Metrologica Sinica

基　　金：国家市场监督管理总局科技计划(2021MK003);中国博士后科学基金面上资助(2022M710443);北京市博士后科研活动经费;北京市朝阳区2021年度博士后科研活动经费。

摘　　要：利用静态箱法可探索美国BGI公司生产的多种旋风式切割器和国产撞击式切割器的采样流量(Q)对50%切割粒径(D 50)的影响,结果表明任意一种类型的旋风式切割器,采样流量变化均会导致采集效率曲线平移,流量越大,D 50越小。在同一个旋风式切割器中,通过改变流量可实现PM1.0、PM2.5和PM4.0等模式的切换,且采样流量与D 50近似成反比,而对于撞击式切割器,D 50的平方根与采样流量近似成反比。该研究可作为一种快速评估方法,根据实际流量快速估算其对应的D 50,具有一定的应用价值。The method of static box was used to explore the influence of sampling flow(Q)on the cut size D 50 of particulate matter cutter,including a variety of cyclone cutters of BGI and an impaction-type cutter of Chinese brand.The results showed that no matter which type cyclone cutter,the changes of sampling flow resulted in translation of collection efficiency curve.And the greater the flow rate,the smaller D 50.In addition,it was found that the PM1.0,PM2.5 and PM4.0 modes could be switched by changing the flow rate in the same whirlwind cutter,and the sampling flow rate was approximately inversely proportional to D 50.For the impaction-type cutter,the square root of D 50 was approximately inversely proportional to the sampling flow.It could be used as a rapid evaluation method to quickly estimate the corresponding D 50 according to the actual flow rate,which has certain application value.

关 键 词：计量学 切割器 切割粒径 采样流量 静态箱法 

分 类 号：TB99[一般工业技术—计量学]