Aerated solids particle laser analyzer gas path system for aerated solids particle laser analyzer

Abstract

The invention provides an air passage system used for an aerosol particle laser analyzer, comprising a sampling air passage, a shell flow air passage and a total flow air passage; the sampling air passage comprises an aerosol particle beam queuing acceleration sampling pipe wrapped by the shell flow; the lower end of the sampling pipe is a particle acceleration spraying hole; the shell flow air passage comprises a shell flow air inlet pipeline and a shell flow pipe which is coaxially sheathed outside the aerosol particle beam queuing acceleration sampling pipe; and the total flow air passage comprises an aerosol particle laser analyzer detection chamber and a total flow exhaust pipeline. The air passage system has the advantages of reasonable structure, high flow control precision, low energy consumption, long service life and the like.

Description

technical field [0001] The invention relates to a gas path system for an aerosol particle laser analyzer. Background technique [0002] When people study the properties of aerosol particles, they first need to measure the size of the particles. Due to different measurement methods, there are different ways to express the size of aerosol particles. The most common ones are geometric diameter, light scattering diameter, aerodynamic diameter, surface area diameter and mass diameter. The previous particle size representation methods have a common feature, that is, they are all represented by diameter, that is to say, they are all represented by the equivalent of aerosol particles into spherical particles. In fact, the shapes of aerosol particles in nature are various, including various irregular geometric shapes such as spherical, rod-shaped, filamentous, and sheet-like. The traditional method of detecting aerosol particles is to directly measure the particle geometry under a ...

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Problems solved by technology

As a result, unnecessary contradictions are caused. On the one hand, aerosol particles must be highly concentrated, and on the other hand, most of the airflow containing highly concentrated particles must be filtered to form a clean shell flow without particles. On the one hand, the load on the high-efficiency filter is increased, resulting in frequent clogging of the high-efficiency filter, which reduces the service life of the high-efficiency filter, increases the maintenance frequency and the cost of the instrument; on the other hand, it also increases the load on the pre-stage sample concentration device , manufacturing costs and usage costs

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