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A kind of ambient air ozone generation potential measuring device and method

A technology of ambient air and measurement methods, which is applied in the directions of measuring devices, chemical method analysis, air quality improvement, etc., can solve the problems of inability to reflect the real conditions of the atmospheric environment, limited detection of VOCs concentration, etc., and achieve the effect of avoiding estimation deviations

Active Publication Date: 2022-07-26
SICHUAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of ambient air O for above-mentioned weak point 3 The potential measurement device and method solve the problem that the analysis conditions in the prior art are limited to the concentration detection of VOCs in the environment, and the MIR value is an extreme value obtained under specific conditions, which cannot reflect the real conditions of the atmospheric environment

Method used

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  • A kind of ambient air ozone generation potential measuring device and method

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Embodiment 1

[0029] like figure 1 As shown, the present invention provides a kind of technical scheme:

[0030] an ambient air O 3 The generation potential determination device includes a reaction chamber, a detection assembly, an air intake assembly and a compensation assembly; the air intake assembly is connected to the reaction chamber, the detection assembly and the reaction chamber are connected through a three-way valve, and one end of the three-way pipeline is connected to the reaction chamber. The atmosphere is communicated and set, and the compensation component is connected with the reaction chamber;

[0031] Based on the above structure, the gas in the environment is filled into the reaction chamber by the air intake assembly after processing. The compensation component is used to supplement the missing components in the reaction chamber.

[0032] The air intake assembly includes an air source, a first flow controller, a filter, an ozone removal device, a humidity control sys...

Embodiment 2

[0052] Based on the above-mentioned Embodiment 1, this embodiment provides a method for directly measuring the ozone generation potential of ambient air, the specific steps of which are as follows;

[0053] Air intake: open the air source and the two-way valve, and pass the ambient air through the first flow controller, filter, ozone removal device and humidity control system in sequence, and finally enter the reaction chamber through the one-way valve; at the same time, open the temperature and humidity monitoring device and circulating fan to keep the temperature and humidity in the reaction chamber consistent with the environment;

[0054] The atmospheric flux entering the reaction chamber is precisely controlled by the first flow controller, and the particles with a particle size larger than 2 microns in the atmospheric environment are removed by the filter, and finally the ozone charged into the atmospheric environment is removed by the ozone removal device, and the humidi...

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Abstract

The invention discloses an ambient air O 3 A generation potential determination device and method, comprising a reaction chamber, a detection assembly, an air intake assembly and a compensation assembly; the air intake assembly is connected to the reaction chamber, the detection assembly and the reaction chamber are connected through a three-way valve, and a three-way pipeline One end is connected to the atmosphere, and the compensation component is connected to the reaction chamber; the air intake component includes an air source, a first flow controller, a filter, an ozone removal device, a humidity control system and a two-way valve. The first flow rate The controller is arranged between the air source and the filter, the ozone removal device is arranged between the filter and the humidity control system, and the two-way valve is arranged between the humidity control system and the reaction chamber; The direct measurement of air ozone generation potential avoids the estimation bias caused by indirect estimation, and more realistically measures the effect of active species in the atmosphere on O 3 The device can better meet the needs of atmospheric environment monitoring and analysis.

Description

technical field [0001] The invention relates to the field of atmospheric environment monitoring and experimental scientific research, in particular to an ambient air O 3 A production potential measurement device and method are provided. Background technique [0002] Ozone (O 3 ) is one of the most important air pollutants in Chinese cities. In recent years, the city O 3 Pollution is becoming more and more prominent and has obvious regional and compound characteristics, which seriously affects the quality of the atmospheric environment and becomes the most important restricting factor for the continuous improvement of ambient air quality. [0003] low altitude O 3 Usually in the season of high temperature and strong solar radiation, it is generated by photochemical reactions such as nitrogen oxides (NOx) and volatile organic compounds (VOCs). Therefore, for atmospheric O 3 The transformation process of its precursors is becoming one of the research hotspots at home and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/00G01N33/00
CPCG01N31/00G01N33/0039G01N33/0037Y02A50/20
Inventor 周力杨复沫陈东阳
Owner SICHUAN UNIV
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