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1-3 nano aerosol screening device based on electromobility and application

A screening device and electro-mobility technology, applied in measurement devices, particle size analysis, analysis of materials, etc., can solve the problems of heavy fans, background noise, and uncomfortable atmospheric environment monitoring, and achieve easy manufacturing and maintenance, accurate quantitative measurement. , compact structure

Active Publication Date: 2016-06-29
TSINGHUA UNIV
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Problems solved by technology

However, due to the excessive flow of sheath gas, the pipelines and fans attached to the instrument are bulky, and there is background noise, so it is only suitable for qualitative or semi-quantitative measurement of test aerosols in the laboratory, and is not suitable for carrying out in actual field conditions. Atmospheric Environment Monitoring

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  • 1-3 nano aerosol screening device based on electromobility and application
  • 1-3 nano aerosol screening device based on electromobility and application

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] Such as figure 1 Shown, a kind of 1-3 nanometer aerosol screening device based on electric mobility of the present invention comprises sheath gas inlet part, aerosol inlet part, separation zone, sheath gas outlet part and aerosol outlet part;

[0044] The sheath gas inlet part includes a trumpet-shaped diverging part 1, a funnel-shaped converging part 2, and a filter membrane 3 for making the air flow distributed in a plug flow; the filter membrane 3 is tightly pressed against the funnel-shaped progressive shrink part 2;

[0045] The aerosol inlet part comprises an aerosol inlet circular tube 4, a symmetrically arranged aerosol inlet cavity 5 and a symmetrically arranged aerosol inlet slit 6 for uniformly distributing the gas; the aerosol inlet circular tube 4 and the same side The aerosol inlet body 5 is tangent; the aerosol inlet slit 6 on th...

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Abstract

The invention belongs to the technical field of environmental monitoring, and particularly relates to a 1-3 nano aerosol screening device based on electromobility and application. The screening device comprises a sheath gas inlet part, an aerosol inlet part, a separation area, a sheath gas outlet part and an aerosol outlet part. According to the screening device, dispersed aerosol is screened into approximately monodispersed aerosol, a high passing rate and resolution ratio are achieved, and the device is suitable for selective screening of 1-3 nano aerosol under the atmospheric environment detecting condition, and can also be widely applied to selective screening of 1-3 nano aerosol with higher concentration generated by other sources. The device is strictly tested and calibrated, a screening transmission equation mode is known, real particle size distribution of detected particles can be obtained through data inversion, and therefore precise quantitative measurement is achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to a 1-3 nanometer aerosol screening device based on electric mobility and its application. Background technique [0002] At present, my country's atmospheric environmental problems are prominent. The phenomenon of complex air pollution dominated by fine particle pollution is serious, and regional haze events occur frequently, which have attracted widespread attention. Gaseous precursors such as sulfuric acid molecules, ammonia gas, organic ammonia, and water in the atmosphere generate high-concentration 1-3 nanometer particles through nucleation and subsequently grow to 100-200 nanometers, which is one of the main causes of fine particle pollutants one. Effective screening of 1-3 nanometer aerosols is very important for the detection of new particle generation events, the study of particle nucleation mechanisms, the control of regional-scale particle p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
CPCG01N15/0266
Inventor 蒋靖坤蔡润龙陈大仁郝吉明
Owner TSINGHUA UNIV
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