Reactor, system and method for rapid detection of tail gas secondary aerosol generation factor

Abstract

The invention provides a reactor, a system and a method for quickly detecting the secondary aerosol formation factor of exhaust gas, which are used to solve the inaccurate detection results caused by the attachment of particulate matter to the inner wall in the prior art, and the inability to quickly detect the secondary gas of motor vehicle exhaust The problem of sol-forming factor. The reactor includes: a vertical channel made of quartz material and a flow guide assembly made of Teflon material, the flow guide assembly includes a sample gas channel and a plurality of sheath gas deflectors arranged on the top of the vertical channel; the sample gas The end of the channel includes a tapered diffuser with a small top and a large bottom, and each of the sheath gas deflectors has a dense small-hole type sheath gas inlet; the reactor also includes a sample tube installed at the bottom of the vertical channel. A gas extraction funnel and a sheath gas extraction baffle, the sheath gas extraction baffle is provided with a sheath gas outlet around the sample gas extraction funnel; the reactor also includes an ultraviolet light source installed around the vertical channel for oxidizing the tail gas The generation of secondary aerosol has the effect of rapid and accurate detection.

Description

technical field

[0001] The invention relates to the field of pollutant detection, in particular to a reactor, a system and a method for quickly detecting secondary aerosol formation factors of tail gas. Background technique

[0002] In recent years, my country has made outstanding progress in the research of atmospheric haze traceability, air quality detection and control technology and other aspects. Studies have shown that the contribution rate of secondary aerosols to PM2.5 in some areas of my country is as high as 60%, but the formation mechanism of secondary aerosols is still unclear. As the number of motor vehicles continues to increase, the impact of their exhaust emissions on air quality has received widespread attention from all walks of life. Although the primary particulate matter emitted by motor vehicle exhaust is less, it emits a large amount of nitrogen oxides (NOx) and volatile organic compounds (VOCs) and other substances, which are important precursors for...

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