Aerosol scattering coefficient moisture-absorption increase measuring instrument and measuring method thereof

Abstract

The invention provides an aerosol scattering coefficient moisture-absorption increase measuring instrument. The aerosol scattering coefficient moisture-absorption increase measuring instrument comprises a drying system, an air humidity control system, a data acquisition processing system, and an aerosol scattering coefficient measuring system. The air humidity control system uses a humidificationapparatus, a gas-gas conveying scheme is employed, which is characterized in that moist air with certain humidity is existed at an external chamber of a steam penetration pipe, and the steam is conveyed to sample-introduction airflow in the penetration pipe according to the steam differential pressure inside and outside of the penetration pipe. In addition, the invention also provides an atmosphere aerosol volatilization characteristic measuring method. The aerosol scattering coefficient moisture-absorption increase measuring instrument can be used for measuring the scattering moisture-absorption increase capability of atmosphere aerosol particles. Compared with the prior art, the aerosol scattering coefficient moisture-absorption increase measuring instrument and the measuring method thereof have the function for measuring the atmosphere scattering coefficients under different relative humidity, and have the advantages of high automation degree and good stability.

Description

technical field [0001] The invention relates to atmospheric detection equipment, in particular to an aerosol scattering coefficient hygroscopic growth measuring instrument and a measuring method. Background technique [0002] The hygroscopic characteristics of aerosols describe the interaction between aerosol particles and water vapor under certain water vapor conditions. They are related to the physical and chemical properties of aerosols, and affect the optical properties of aerosols and cloud physical properties. They belong to the field of aerosol research. one of the fundamental issues. [0003] At present, the measurement methods of aerosol hygroscopic growth mainly include particle size hygroscopic growth and scattering coefficient hygroscopic growth. Although foreign scientific research institutions carried out the research and development of aerosol hygroscopicity measuring instruments earlier, they mainly focused on the measurement of the hygroscopic growth factor...

AI Technical Summary

Problems solved by technology

For the measurement of the moisture absorption growth of the scattering coefficient, the humidification methods usually use two methods such as "dilution/mixing" and "water-air exchange". Uniform, difficult to apply to the measurement of mixed aerosols under ambient atmospheric conditions; the latter has the advantage of high humidi

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