Aerosol gas distribution device of electromobility classifier

Abstract

The invention provides an aerosol distribution device of an electromobility classifier, which is suitable for a cylindrical coaxial aerosol electromobility classifier and comprises an aerosol inlet part, a triangular shunt and a sheath gas and aerosol spacing ring, and the aerosol inlet part is a peripheral cavity of the aerosol distribution device; the triangular flow divider is an airflow guide module of aerosol, and annular guide of airflow is achieved; and the sheath gas and aerosol spacing ring is used for converting aerosol airflow into laminar flow which is uniformly distributed circumferentially. According to the invention, while the buffer volume of the aerosol inlet is reduced, the loss of particulate matters in the gas distribution process is reduced, and the screening and transmission efficiency of the electromobility classifier is improved.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to an aerosol air distribution device of an electric mobility classifier. Background technique [0002] For the characterization of the concentration of particulate matter in the environment, the mass concentration of particulate matter is often used, such as PM 2.5 and PM 10 , or the total concentration of particulate matter. The impact of particles of different particle sizes on the environment or individuals will be different, so it is necessary to measure the concentration of particles with different particle sizes. For the sieving of the particle size of submicron particles, it is usually based on the characteristics of the electric mobility of the particles. When the particles have one charge, the larger the particle size, the smaller the corresponding electric mobility; the smaller the particle size The larger the electric mobility is; it is pl...

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Problems solved by technology

Conventional aerosol gas distribution methods are as follows: one is to increase the aerosol buffer zone, such as the 3081 electric mobility classifier produced by TSI Company of the United States, set a larger buffer zone in the aerosol inlet area, and increase the slit area at the same time In order to achieve the purpose of uniform gas distribution; the second is to increase the distribution of air holes, such as the electric mobility classifier produced by GRIMM, and distribute the gas by arranging small holes around the aerosol inlet area; the third is to distribute gas through multiple aerosols The way of air inlet, this way separates one aerosol into multiple channels outside the electromobility classifier, which will greatly increase the complexity of the system; the fourth is to enter through tangential airflow, so that the aerosol can be classified in the electromobility class Rotating in the device, this method makes the air flow have a larger tangential velocity, and at the same time it is easy to cause uneven air distribution of the aerosol

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