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A measure of atmospheric o x and o 3 detection system and method

A detection system and atmospheric technology, applied in the field of detection systems for measuring atmospheric Ox and O3, can solve problems such as interference and difficulty in the measurement of nitrogen-containing compounds, and achieve the effects of avoiding measurement interference, easy operation, and wide applicability

Active Publication Date: 2021-07-27
ANHUI MEDICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, some commercial O 3 and NO 2 measurement equipment, but due to O 3 The measurement may be interfered by the measurement of atmospheric VOC, while the NO 2 Susceptible to the measurement interference of other nitrogen-containing compounds in the atmosphere, it is still difficult to obtain an accurate concentration distribution

Method used

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  • A measure of atmospheric o <sub>x</sub> and o <sub>3</sub> detection system and method
  • A measure of atmospheric o <sub>x</sub> and o <sub>3</sub> detection system and method
  • A measure of atmospheric o <sub>x</sub> and o <sub>3</sub> detection system and method

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Embodiment 1

[0040] Such as Figure 1-5 Shown, a kind of measurement atmospheric O of this embodiment x and O 3 detection system, including atmospheric ozone and NO x Dynamic removal module 1, ozone dynamic conversion module 2, O x and NO 2 Detection module 3.

[0041] Atmospheric ozone and NO x The dynamic removal module 1 includes a particle filter unit 11 , a fully automatic three-way controller 12 , a nitrogen oxide removal unit 13 , an ozone removal unit 14 and a branch pressure control unit 15 . The particle filter unit 11 is connected with the gas to be measured 4, the rear end of the particle filter unit 11 is connected with a full-automatic three-way controller 12, and the rear end of the full-automatic three-way controller 12 is connected with two independent paths, namely path one 16 and path Two 17. A branch pressure control unit 15 is provided on the channel one 16; a nitrogen oxide removal unit 13 and an ozone removal unit 14 are arranged in sequence on the channel two...

Embodiment 2

[0065] A kind of measurement atmospheric O in the above-mentioned embodiment 1 adopts the present embodiment x and O 3 The method for measuring with the detection system comprises the following specific steps:

[0066] (1) The power of the gas flow is provided by the suction pump 366 to sample from the atmosphere;

[0067] (2) After passing through the particulate matter filter unit 11, the gas to be measured 4 that filters out the particulate matter in the atmosphere enters the fully automatic three-way controller 12, and selects to enter passage one 16 (through the shunt pressure control unit 15) or passage two 17 (through Nitrogen oxide removal unit 13 and ozone removal unit 14); keep the automatic two-way controller 23 closed, and the gas enters the ring-down cavity unit 36 ​​through the chemical reaction flow tube 24 to measure the ring-down time τ and the background ring-down time τ 0 ; in known NO 2 Absorption cross section, speed of light c, R L Under the condition...

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Abstract

The invention provides a method for measuring atmospheric O x and O 3 detection system, including atmospheric ozone and NO x Dynamic removal module, ozone dynamic conversion module, O x and NO 2 Detection module; atmospheric ozone and NO x The dynamic removal module includes a particle filter unit, a fully automatic three-way controller, a nitrogen oxide removal unit, an ozone removal unit, and a branch pressure control unit; the ozone dynamic conversion module includes a NO gas cylinder, a first flow controller, and a fully automatic two-way Controller and chemical reaction flow tube; O x and NO 2 The detection module includes a split air intake unit, a timing and pulse control unit, a pulse modulation diode laser unit, an optical isolation unit, an optical path adjustment unit and a ring-down cavity unit. The present invention also provides a method of measuring using the above system. The invention can not only realize the direct measurement of atmospheric photochemical oxidants, but also obtain the 3 The high-precision measurement data helps to understand the law of urban air pollution.

Description

technical field [0001] The invention relates to the field of atmospheric environment monitoring, in particular to a method for measuring atmospheric O x and O 3 detection system and method. Background technique [0002] In the context of global urbanization and economicization, the development of my country's urban agglomerations continues to expand, and the number of motor vehicles has also increased significantly. Along with this, the concentration of atmospheric ozone has also remained high. At present, the pollution of PM2.5 in my country has been initially controlled, but the pollution of atmospheric ozone has become more serious, especially in the Yangtze River Delta and the Beijing-Tianjin-Hebei region; Also further improved the oxidation of the atmosphere; to a certain extent, the oxidation capacity of the atmosphere can be used photochemical oxidant (O x =O 3 +NO 2 )To represent. [0003] Atmospheric O 3 , NO x The relationship between photochemical oxidants ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/01G01N21/39G01N1/34
CPCG01N1/34G01N21/01G01N21/39
Inventor 刘小燕胡仁志金涌朱丽丽陈飞虎
Owner ANHUI MEDICAL UNIV
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