Aerosol different-particle-size sample injection system

A sampling system, aerosol technology, applied in the direction of sampling device, air quality improvement, test sample preparation, etc., can solve systematic deviation, can not guarantee the consistency of cut particle size of dry state particles, affect PM mass concentration and The accuracy of chemical composition measurement cuts the uniformity of particle size and other issues

CN114878259APending Publication Date: 2022-08-09中国气象局广州热带海洋气象研究所 +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-08-09

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Abstract

The invention relates to an aerosol particle size division sampling system which comprises a multi-channel gas inlet switching unit, a first-stage cutting unit, a drying unit, a flow supplementing unit, a second-stage multi-channel switching unit, a second-stage cutting unit and a computer control module, the multi-channel air inlet switching unit is connected with the first-stage cutting unit, the multi-channel air inlet switching unit is connected with the flow supplementing unit, and the multi-channel air inlet switching unit is connected with the drying unit; the drying unit is connected with the secondary multi-channel switching unit; the second-stage multi-channel switching unit is connected with the second-stage cutting unit and is used for cutting the dried sampling gas in different modes; the multi-channel air inlet switching unit, the flow supplementing unit and the second-stage multi-channel switching unit are all electrically connected with the computer control module. According to the invention, the consistency of the cutting particle size of particles in a dry state is ensured, so that the mass concentration and chemical components of aerosol particles are accurately measured; the invention belongs to the technical field of environment monitoring.
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Description

technical field

[0001] The invention relates to the technical field of environmental monitoring, in particular to an aerosol particle size sampling system. Background technique

[0002] PM 1 and PM 2.5 Accurate measurement of mass concentration and chemical composition is an important prerequisite for accurate assessment of particulate pollution status, physical and chemical properties of aerosol particles, radiative forcing, climate and environmental effects research, and forecast assessments such as air quality models and climate models. But new research shows that existing PMs 1 and PM 2.5 Mass concentration and chemical composition observations can be significantly affected by aerosol hygroscopic growth, especially in regions of high relative humidity. This is because the measurement of ambient aerosol particles mostly requires drying the ambient atmosphere before performing subsequent measurements, so that the physical and chemical characteristics of the aerosol in ...

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with specific embodiments.

[0023]An aerosol particle size sampling system, comprising a multi-channel air inlet switching unit, a primary cutting unit, a drying unit, a flow supplementary unit, a secondary multi-channel switching unit, a secondary cutting unit and a computer control module; The air switching unit is connected with the primary cutting unit to cut the ambient air in different ways. The multi-channel intake switching unit is connected with the flow supplementary unit to supplement the flow of the cutting sampling gas. The multi-channel intake switching unit is connected with the drying unit. It is used to dry the humidity of the sampling gas; the drying unit is connected with the secondary multi-channel switching unit to divide the dried sampling gas; the secondary multi-channel switching unit and the secondary cutting unit are connected to separate the dried sampling gas. Cut...