Atmospheric aerosol trapping method and device

Abstract

The invention relates to an atmospheric aerosol trapping method and a device thereof. The method is characterized in that an electrical heating rod is utilized to heat pure water in continuous constant current to generate vapor; the vapor meets atmospheric airflow in a cavity where an aerosol absorbs moisture and expands; with the stay of the vapor airflow in the cavity where the aerosol absorbs moisture and expands, and with the natural cooling action, the aerosol absorbs moisture and expands; the airflow takes the aerosol which absorbs moisture and expands to a snake-shaped cooler to cool the vapor airflow into a solution, and the aerosol is trapped in the solution; the airflow with the solution formed through condensation realizes the separation of the air and the solution in an aerosol impact collector, and the collection of the aerosol. The aerosol trapping device comprises an air course part, a vapor generating part for providing vapor for the air course, a cooling device for cooling the air course circularly, and a circuit part for controlling the vapor generating part, the air course part and the cooling device. The method and the device can effectively realize the quick trapping of aerosol and on-line automatic analysis of the chemical composition of the aerosol.

Description

technical field [0001] The invention relates to a method and device for capturing atmospheric aerosol. 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. Aerosols refer to solid particles or liquid particles that can be suspended in a gaseous medium, mainly including dust, liquid droplets, chemical particles, etc. At present, the sampling methods for capturing aerosols in the atmosphere are generally offline sampling methods and online sampling methods. The offline sampling methods include: membrane sampling method, impact type sampling method and other methods, and the online sampling methods include: particle-liquid conversion collection System (Particle-into-liquid sampler, PILS for short), steam jet aerosol collector (Steam JetAerosol Collector, SJAC for short) and other methods. [0003] For the sampling and ana...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: long sampling time, cumbersome operation steps, easy to change components during sampling and storage, etc.

There are only a very small amount of domestic literature reporting the continuous fixed-point observation data of aerosol chemical composition. The main reason is the lack of effective aerosol fast traps and online automatic analysis equipment for chemical composition.

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