Additional pressure flow type multi-level submicron particle collector

Abstract

The invention discloses an additional pressure flow type multi-level submicron particle collector. The additional pressure flow type multi-level submicron particle collector comprises a collector bodyas well as a primary air inlet cavity, a primary separation cavity, a primary collection cavity and a secondary collection chamber sequentially arranged in the collector body from top to bottom, wherein the primary air inlet cavity is provided with a primary air inlet channel for sampling air entering as well as a primary pressure flow channel I and a primary pressure channel II respectively arranged on the left side and the right side of the primary air inlet channel; a first cross flow channel is arranged under an air outlet of the primary air inlet channel; the left end and the right end of the first cross flow channel are respectively communicated with the primary pressure flow channel I and the primary pressure channel II. According to the additional pressure flow type multi-level submicron particle collector disclosed by the invention, direct contact between the sampling air and the inner wall of the collector body can be avoided, so that loss of the wall surface is reduced, andthe collection efficiency is improved; meanwhile, the precision of particle diameters of the collected particles can be improved, and high-efficient separation on submicron particles is achieved.

Description

technical field [0001] The invention relates to a virtual impactor, in particular to an additional pressure-flow type multi-stage submicron particle collector. Background technique [0002] In atmospheric and industrial environmental monitoring, before determining the source of particulate matter and evaluating the hazards or potential hazards of particulate matter to humans and the environment, it is necessary to understand the composition, particle concentration, and particle size distribution of aerosol particles. Carry out sampling, grading and detection analysis, so as to be able to give early warning of harmful particles existing in the environment. The importance of this requirement is also reflected in the handling of emergency events (such as the Tokyo subway poisoning incident in 1995, the US anthrax attack in 2001, the Syrian biochemical war in 2017, and natural disasters such as earthquakes and volcanic eruptions). To ensure that front-line rescuers can keep abr...

AI Technical Summary

Problems solved by technology

However, the existing virtual impactors have poor control over particle loss, mainly manifested in large wall loss, resulting in low collection efficiency

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