Aerosol collector and method for collecting aerosol by means of aerosol collector
An aerosol and collector technology, applied in instruments, scientific instruments, sampling, etc., can solve problems such as large differences in mixing efficiency of aerosol collectors and doubts about data reliability
Pending Publication Date: 2022-03-01
THERMO FISHER SCI SHANGHAI INSTR CO LTD
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Problems solved by technology
[0006] However, the mixing efficiencies of various aerosol collectors vary widely, which leads to large differences in subsequent ion extraction efficiencies
When such aerosol collectors are used for online air quality monitoring, the reliability of their data may be questioned
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[0051] It should be noted that the drawings referred to are not all drawn to scale but may be exaggerated to illustrate aspects of the invention and in this respect the drawings should not be construed as limiting.
[0052] In various industrial applications, aerosol condensation using thermal vapor flow has become the best choice method for aerosol collection because of its wide sampling flow range (from 1 to 50LPM) and extremely high collection efficiency. Therefore, the aerosol collector according to the present invention is also mainly based on the working principle of spraying vapor into the aerosol, followed by hygroscopic growth and further condensation collection. When the aerosol collector is applied to online atmospheric detection or air quality monitoring, the atmosphere containing aerosol flows into the aerosol collector, and the condensed condensate can be subsequently extracted for detection and analysis (for example, with various continuous analysis Automatic an...
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The present invention provides an aerosol collector comprising: a gas inlet module for inputting a gas containing an aerosol into the aerosol collector; the steam module is used for providing steam for the aerosol collector; the aerosol-containing gas input from the gas inlet module is mixed with the steam provided by the steam module in the mixing chamber; the condensation module is used for condensing the mixed gas containing the aerosol into condensate containing the aerosol; the gas inlet module and the mixing chamber are arranged in a way that a first temperature difference between the temperature of the gas containing the aerosol flowing into the mixing chamber and the temperature in the mixing chamber is between 20 DEG C and 100 DEG C. The invention also relates to a method for collecting aerosols by means of an aerosol collector. Therefore, the mixing efficiency and the final extraction efficiency can be optimized by controlling the partition temperature between the two adjacent modules of the aerosol collector.
Description
technical field [0001] The invention relates to an aerosol collector, mainly a steam injection aerosol collector. Furthermore, the invention relates to a method for collecting aerosols by means of an aerosol collector. Background technique [0002] At present, there are many kinds of air pollutants, which can be summarized into two categories according to their existing state: gaseous pollutants and aerosol state pollutants. Aerosol refers to solid or liquid particles that can be suspended in a gaseous medium, including but not limited to atomic or molecular simple substances or mixtures, atomic ions or molecular ions, and macromolecular clusters (such as virus molecules). At present, the sampling methods for capturing aerosols in the atmosphere are generally divided into two types: off-line sampling methods and on-line sampling methods. The methods of off-line sampling collection include: membrane sampling method, impact fractional sampling method and other methods. For e...
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IPC IPC(8): G01N1/22
CPCG01N1/2202G01N1/2273G01N2001/2223G01N2001/2282
Inventor 秦来贵吴升海任宏志邹光麟
Owner THERMO FISHER SCI SHANGHAI INSTR CO LTD