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A 1-3 nanometer aerosol screening device based on electric mobility and its application

A screening device and electric mobility technology, applied in measuring devices, analytical materials, particle size analysis, etc., can solve the problems of bulky fans, unsuitable atmospheric environment monitoring, background noise, etc., and achieve easy manufacturing and maintenance, compact structure, Precise Quantitative Measurement of Effects

Active Publication Date: 2019-01-18
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A 1-3 nanometer aerosol screening device based on electric mobility and its application
  • A 1-3 nanometer aerosol screening device based on electric mobility and its application

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Embodiment Construction

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

[0043] Such as figure 1 As shown, a 1-3 nanometer aerosol sieving device based on electrical mobility of the present invention includes a sheath gas inlet part, an aerosol inlet part, a separation zone, a sheath gas outlet part and an aerosol outlet part;

[0044] The sheath gas inlet part includes a flared divergent part 1, a funnel-shaped tapered part 2, and a filter membrane 3 for distributing the airflow in a plunger flow, which are connected in sequence; Shrink part 2 on;

[0045] The aerosol inlet part includes an aerosol inlet tube 4, a symmetrically arranged aerosol inlet cavity 5 for evenly distributing gas, and a symmetrically arranged aerosol inlet slit 6; the aerosol inlet tube 4 is on the same side The aerosol inlet cavity 5 is tangent; the aerosol inlet slit 6 on the same side communicates with the aerosol inlet cavity 5 and is arranged below the aerosol inl...

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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 specifically relates to a 1-3 nanometer aerosol sieving device based on electric mobility and an application. Background technique [0002] At present, my country's atmospheric environmental problems are prominent. Compound air pollution dominated by fine particulate matter pollution is serious, and regional haze incidents are frequent, which has attracted widespread attention. The gaseous precursors such as sulfuric acid molecules, ammonia, organic ammonia, and water in the atmosphere generate high concentrations of 1-3 nanometer particles through nucleation and then grow to 100-200 nanometers, which are the main causes of fine particulate 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 pollution, the control of...

Claims

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Application Information

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Patent Type & Authority Patents(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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