CN113899846B - Device and method for measuring ozone generation potential of ambient air - Google Patents
Device and method for measuring ozone generation potential of ambient air Download PDFInfo
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- CN113899846B CN113899846B CN202111070193.4A CN202111070193A CN113899846B CN 113899846 B CN113899846 B CN 113899846B CN 202111070193 A CN202111070193 A CN 202111070193A CN 113899846 B CN113899846 B CN 113899846B
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000012080 ambient air Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 98
- 239000003570 air Substances 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000012806 monitoring device Methods 0.000 claims description 33
- 238000006303 photolysis reaction Methods 0.000 claims description 14
- 230000015843 photosynthesis, light reaction Effects 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000002474 experimental method Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 49
- 239000007789 gas Substances 0.000 description 32
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 description 9
- -1 Polytetrafluoroethylene Polymers 0.000 description 6
- 239000012855 volatile organic compound Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0037—NOx
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0039—O3
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- General Health & Medical Sciences (AREA)
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- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Molecular Biology (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses an environmental air O 3 The device comprises a reaction cavity, a detection assembly, an air inlet assembly and a compensation assembly; the inlet airThe component is connected with the reaction cavity, the detection component is connected with the reaction cavity through a three-way valve, one end of a three-way pipeline is communicated with the atmosphere, and the compensation component is connected with the reaction cavity; the air inlet assembly comprises an air source, a first flow controller, a filter, an ozone removing device, a humidity control system and a two-way valve, wherein the first flow controller is arranged between the air source and the filter, the ozone removing 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 scheme can realize direct measurement of the ozone generation potential of the ambient air, avoids estimation deviation caused by indirect estimation, and more truly measures the active species in the atmosphere to O 3 The generated contribution can better meet the requirements of atmospheric environment monitoring, analysis and the like.
Description
Technical Field
The invention relates to the field of atmospheric environment monitoring and experimental science research, in particular to an environmental air O 3 A device and a method for measuring a formation potential.
Background
Ozone (O) 3 ) Is one of the most important atmospheric pollutants in cities in China. In recent years, city O 3 The pollution is increasingly prominent and remarkably presents regional and composite characteristics, the quality of the atmospheric environment is seriously influenced, and the pollution becomes the most main constraint factor for continuously improving the quality of the ambient air.
Low altitude O 3 In general, nitrogen oxides (NOx), Volatile Organic Compounds (VOCs), and the like are generated by photochemical reactions in seasons where the temperature is high and the solar radiation is strong. Thus for atmospheric O 3 The transformation process of the precursor of the compound is becoming one of the focus of research at home and abroad. Existing research is directed to O in the environment 3 The generation potential of the compound is mainly estimated by detecting the precursor VOCs and combining the existing maximum increment reaction coefficient (MIR) value, but the existing analysis condition has limited detection on the composition and concentration of the VOCs in the environment, and the MIR value is an extreme value obtained under a specific condition and cannot reflect the real condition of the atmospheric environment.
Therefore, the development of a direct determination device and a direct determination method for the ozone generation potential of the ambient air has great significance for researching the pollution potential of the ambient air and controlling the pipes.
Disclosure of Invention
The invention aims to provide the environmental air O aiming at the defects 3 The device and the method for measuring the generation potential solve the problems that the analysis conditions in the prior art are limited for detecting the concentration of VOCs in the environment, and the MIR value is an extreme value obtained under a specific condition and cannot reflect the real conditions of the atmospheric environment.
The scheme is realized as follows:
ambient air O 3 The generation potential measuring device comprises a reaction cavity, a detection assembly, an air inlet assembly and a compensation assembly; the gas inlet assembly is connected with the reaction cavity, the detection assembly is connected with the reaction cavity through a three-way valve, one end of the three-way pipeline is communicated with the atmosphere, and the compensation assembly is connected with the reaction cavity.
Based on the above environmental air O 3 The structure of the potential measuring device is generated, the air inlet assembly comprises an air source, a first flow controller, a filter, an ozone removing device, a humidity control system and a two-way valve, the first flow controller is arranged between the air source and the filter, the ozone removing 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.
Based on above-mentioned ambient air O 3 A structure for generating a potentiostat, the test assembly comprising a three-way valve, an ozone monitoring device, a NOx monitoring device; the ozone monitoring device and the NOx monitoring device are respectively connected with the reaction cavity through a three-way valve.
Based on above-mentioned ambient air O 3 The structure of the potential measuring device is generated, and the reaction cavity comprises a reaction chamber, a light source, a temperature and humidity monitoring device, a temperature control box, a circulating fan and photolysis efficiency measuring equipment; the reaction chamber is arranged in the reaction cavity, the light source is arranged at the top of the reaction cavity, the circulating fan is arranged in the reaction chamber, the photolysis efficiency measuring equipment is arranged at the bottom of the reaction cavity, the temperature control box is arranged at the outermost side of the reaction cavity, and the temperature and humidity monitoring device is arranged in the reaction chamber.
Based on the above-mentioned oneAmbient air O 3 The structure of the potential measuring device is generated, the compensation assembly comprises a second flow controller and a gas steel cylinder, the gas steel cylinder is communicated with the reaction chamber through the second flow controller, and gas to be compensated in the gas steel cylinder is accurately and quantitatively filled into the reaction chamber through the second flow controller.
Based on above-mentioned ambient air O 3 And generating a structure of the potential measuring device, wherein the first flow controller or the second flow controller is one or more of flow control devices such as a mass flow meter, a float flow meter, a needle valve or a proportional solenoid valve.
Based on the above environmental air O 3 And generating a structure of the potential measuring device, wherein the temperature control box needs to be capable of regulating and controlling the internal temperature of the box body within the range of 10-40 ℃.
The invention also provides an ambient air O 3 A method for measuring the potential of the formation,
the method comprises the following specific steps;
air intake: gas in the environment is filtered and decontaminated and O is removed through the gas inlet assembly 3 And the reaction chamber is filled after the humidity is regulated;
calibrating O in an environment 3 And NOx: detection of gas components in the ambient atmosphere, in particular O, by means of a detection assembly 3 And NOx;
measurement of pre-reaction concentration: after the air inlet step is finished, detecting O3 and NOx in the atmosphere in the reaction cavity through a detection assembly;
and (3) starting measurement: the illumination test is carried out in the reaction cavity, the temperature stability of the reaction chamber is controlled by the temperature control box, and the O in the reaction chamber is detected by the detection component 3 Concentration and NOx concentration, determining O of ambient air under specific conditions 3 A potential is generated.
The air inlet step is specifically that an air source and a two-way valve are opened, ambient air passes through a first flow controller, a filter, an ozone removing device and a humidity control system in sequence, and finally enters a reaction chamber through a one-way valve; and simultaneously, the temperature and humidity monitoring device and the circulating fan are started, and the temperature and humidity in the reaction chamber are controlled to be consistent with the environment.
The specific steps for starting the measurement are that a light source, a photolysis efficiency measuring device, an ozone monitoring device and a NOx monitoring device are turned on, and O in the reaction chamber is recorded 3 The concentration and the concentration of NOx are controlled by a second flow controller according to the experiment requirement, NO with specific concentration is added into the reaction chamber 2 (ii) a And recording the reading of the ozone monitoring equipment until the reading of the ozone monitoring equipment does not rise any more; determination of O in ambient air under specific conditions 3 A potential is generated.
Compared with the prior art, the invention has the beneficial effects that:
1. the scheme can realize the direct measurement of the ozone generation potential of the ambient air, avoid the estimation deviation caused by indirect estimation and more truly measure the O of active species in the atmosphere 3 The generated contribution can better meet the requirements of atmospheric environment monitoring, analysis and the like.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
in the figure: 1. a reaction chamber; 2. a detection component; 3. an air intake assembly; 4. a compensation component; 11. a reaction chamber; 12. a light source; 13. a temperature and humidity monitoring device; 14. a temperature control box; 15. a circulation fan; 16. photolysis efficiency measurement equipment; 21. a three-way valve; 22. an ozone monitoring device; 23. a NOx monitoring device; 31. a gas source; 32. a first flow controller; 33. a filter; 34. an ozone removal device; 35. a humidity control system; 36. a two-way valve; 41. a second flow controller; 42. gas cylinders.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example 1
As shown in fig. 1, the present invention provides a technical solution:
ambient air O 3 The generation potential measuring device comprises a reaction cavity, a detection assembly, an air inlet assembly and a compensation assembly; the gas inlet assembly is connected with the reaction cavity, the detection assembly is connected with the reaction cavity through a three-way valve, one end of a three-way pipeline is communicated with the atmosphere, and the compensation assembly is connected with the reaction cavity;
based on the structure, the air inlet component fills the processed gas in the environment into the reaction cavity, the detection is used for calibrating each component in the environment and measuring the components before and after reaction in the reaction cavity, and the compensation component is used for supplementing the lacking components in the reaction cavity.
The air inlet assembly comprises an air source, a first flow controller, a filter, an ozone removing device, a humidity control system and a two-way valve, wherein the first flow controller is arranged between the air source and the filter, the ozone removing 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 cavity;
based on the structure, the gas source provides environmental gas components for the whole measuring device, so that the whole reaction can be measured under more accurate environmental gas components; the first flow controller controls the flow of the gas source entering the reaction cavity, so that the filter can remove the particulate matters provided by the gas source and reduce the influence of the particulate matters on the experiment; the ozone removing device removes ozone gas entering the reaction cavity, and the humidity control system can humidify gas of a gas source to specified humidity, so that the experiment can be conveniently carried out under the condition close to a real environment; the two-way valve controls the on-off of the gas path between the gas inlet assembly and the reaction cavity;
the detection assembly comprises a three-way valve, ozone monitoring equipment and NOx monitoring equipment; the ozone monitoring device and the NOx monitoring device are respectively connected with the reaction cavity through a three-way valve, and are used for respectively measuring the concentration of ozone and the concentration of NOx in the environment and the reaction cavity; the gas input ends of the ozone monitoring device and the NOx monitoring device can be switched through the three-way valve, so that the experiment is convenient to carry out;
the reaction cavity comprises a reaction chamber, a light source, a temperature and humidity monitoring device, a temperature control box, a circulating fan and photolysis efficiency measuring equipment; the reaction chamber is arranged in the middle of the reaction cavity, the light source is arranged at the top of the reaction cavity, the circulating fan is arranged in the reaction chamber, the photolysis efficiency measuring equipment is arranged at the bottom of the reaction cavity, the temperature control box is arranged on the outermost side of the reaction cavity, and the temperature and humidity monitoring device is arranged in the reaction chamber;
based on above-mentioned structure, the temperature control box provides temperature adjustable environment for whole experiment, and the light source provides trigger condition for the experiment, and temperature and humidity monitoring devices detects the temperature and humidity in to the reacting chamber, and convenient follow-up adjusts the humiture, guarantees that the environmental data of reacting chamber is unanimous with the data among the external environment, and circulating fan is with the quick mixing of component in the reacting chamber.
The compensation assembly comprises a second flow controller and a gas steel bottle, the gas steel bottle is communicated with the reaction chamber through the second flow controller, and gas to be compensated in the gas steel bottle is accurately and quantitatively filled into the reaction chamber through the second flow controller; the gas in the gas steel cylinder is NO 2 A standard gas.
The air source can adopt an oil-free air compressor or an oil-free dry pump; the first flow controller or the second flow controller can adopt flow control equipment such as a mass flow meter, a float flow meter, a needle valve or a proportional electromagnetic valve and the like;
the filter adopts the special fluorine dragon material, need can filter particle size among the environment and be greater than 2 microns the ozone remove device can be the laminar flow board of KI coating, ensures O 3 The removal efficiency is more than 99 percent;
the humidity control system can be humidified by a purified water bubbling method or a humidifier (FC-200-780-7MP, Perma-Pure) and measured by a humidity probe, and can humidify the gas source gas to the specified humidity;
the two-way valve or three-way valve can be made of Polytetrafluoroethylene (PTFE), fusible Polytetrafluoroethylene (PFA) or stainless steel
The light source can sample ultraviolet lamp tubes (<420nm), xenon lamps and natural light sources;
the temperature and humidity monitoring device can be a commercial temperature and humidity probe and a data acquisition system;
the circulating fan is made of Polytetrafluoroethylene (PTFE) or fusible Polytetrafluoroethylene (PFA);
the reaction chamber is made of Polytetrafluoroethylene (PTFE) or fusible Polytetrafluoroethylene (PFA) material;
the photolysis efficiency measuring device can be used for sampling commercial photolysis spectrometer or J (NO) 2 ) A filtering radiometer;
the temperature control box body is not limited in material, and the internal temperature of the box body can be regulated within the range of 10-40 ℃;
the ozone monitoring device; the self-made or commercial detection equipment can be adopted, and the detection method is an ultraviolet absorption method and the like.
The NOx monitoring equipment can adopt self-made or commercial detection equipment, and the detection method is a chemiluminescence method, an absorption spectrum method and the like
The method can realize the direct measurement of the ozone generation potential of the ambient air, avoid the estimation deviation caused by indirect estimation, and more truly measure the active species in the atmosphere to the O 3 The generated contribution can better meet the requirements of atmospheric environment monitoring, analysis and the like.
Example 2
Based on the above example 1, this example provides a method for directly measuring the ozone generation potential of the ambient air, which comprises the following specific steps;
air intake: opening an air source and a two-way valve, enabling ambient air to sequentially pass through a first flow controller, a filter, an ozone removing device and a humidity control system, and finally entering a reaction chamber through a one-way valve; simultaneously, starting a temperature and humidity monitoring device and a circulating fan to keep the temperature and humidity in the reaction chamber consistent with the environment;
the atmospheric flux entering the reaction chamber is accurately controlled through the first flow controller, particulate matters with the particle size larger than 2 micrometers in the atmospheric environment are removed through the filter, finally, ozone filled in the atmospheric environment is removed through the ozone removing device, and the temperature and humidity in the chamber corresponding to the temperature and humidity monitoring device are accurately adjusted through the humidity control system;
calibrating O in an environment 3 And NOx: changing the flow direction of the three-way pipe connected with the ozone monitoring equipment and the NOx monitoring equipment to ensure that the ozone monitoring equipment and the NOx monitoring equipment are connected with the atmospheric environment and respectively determine O in the ambient air 3 The concentration of NOx;
measurement of pre-reaction concentration: after the air inlet of the reaction chamber is finished, the two-way valve is closed, the three-way valve is communicated with the reaction chamber, and the O in the reaction chamber is measured 3 And NOx concentration, before ensuring light irradiation, O 3 The concentration is less than the detection limit, and the concentration of NOx is close to the concentration of the environment;
and (3) starting measurement: turning on the light source, photolysis efficiency measuring device, ozone monitoring device and NOx monitoring device, recording O in the reaction chamber 3 The concentration and the NOx concentration are controlled by a second flow controller according to the experiment requirement, and NO with specific concentration is added into the reaction chamber 2 (ii) a And recording the reading of the ozone monitoring equipment until the reading of the ozone monitoring equipment does not rise any more; determination of O in ambient air under specific conditions 3 A potential is generated.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. Ambient air O 3 A method for measuring a formation potential, comprising: comprising an ambient air O 3 The potential measuring device is generated, and the system comprises a reaction cavity, a detection component, an air inlet component and a compensation component; the gas inlet assembly is connected with the reaction cavity, the detection assembly is connected with the reaction cavity through a three-way valve, one end of a three-way pipeline is communicated with the atmosphere, and the compensation assembly is connected with the reaction cavity;
the method comprises the following specific steps;
air intake: gas in the environment is filtered, decontaminated and O is removed through the gas inlet assembly 3 And the reaction chamber is filled after the humidity is regulated;
calibrating O in the Environment 3 And NOx: detection of gas components in the ambient atmosphere, in particular O, by means of a detection assembly 3 And NOx;
measurement of pre-reaction concentration: after the air inlet step is finished, detecting each component in the atmosphere in the reaction cavity through a detection assembly;
and (3) starting measurement: performing illumination test in the reaction chamber, and detecting O in the reaction chamber via the detection assembly 3 Concentration and NOx concentration, determining O of ambient air under specific conditions 3 A potential is generated.
2. Ambient air O as claimed in claim 1 3 A method for measuring formation potential, characterized by: the air inlet assembly comprises an air source, a first flow controller, a filter, an ozone removing device, a humidity control system and a two-way valve, wherein the first flow controller is arranged between the air source and the filter, the ozone removing 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 cavity.
3. Ambient air O as claimed in claim 2 3 A method for measuring formation potential, characterized by: the detection assembly comprises ozone monitoring equipment and NOx monitoring equipment; what is needed isThe ozone monitoring device and the NOx monitoring device are respectively connected with the reaction cavity through a three-way valve.
4. Ambient air O as claimed in claim 3 3 A method for measuring formation potential, characterized by: the reaction cavity comprises a reaction chamber, a light source, a temperature and humidity monitoring device, a temperature control box, a circulating fan and photolysis efficiency measuring equipment; the utility model discloses a photolysis efficiency measuring device, including reaction chamber, light source, circulating fan, photolysis efficiency measuring equipment, temperature control box, temperature and humidity monitoring device, the reaction chamber is established in the reaction chamber, the light source sets up at reaction chamber top position, circulating fan sets up in the reaction chamber, photolysis efficiency measuring equipment sets up in reaction chamber bottom position, the temperature control box sets up the outside at the reaction chamber, temperature and humidity monitoring device sets up in the reaction chamber.
5. Ambient air O as claimed in claim 4 3 A method for measuring formation potential, characterized by: the compensation assembly comprises a second flow controller and a gas steel bottle, the gas steel bottle is communicated with the reaction chamber through the second flow controller, and gas to be compensated in the gas steel bottle is accurately and quantitatively filled into the reaction chamber through the second flow controller.
6. Ambient air O according to claim 5 3 A method for measuring formation potential, characterized by: the first flow controller or the second flow controller is one or more of flow control devices such as a mass flow meter, a float flow meter, a needle valve or a proportional solenoid valve.
7. Ambient air O according to claim 6 3 A method for measuring a formation potential, comprising: the temperature control box needs to be capable of regulating and controlling the internal temperature of the box body within the range of 10-40 ℃.
8. Ambient air O according to claim 7 3 A method for measuring a formation potential, comprising: the air inlet step comprises opening the air source and the two-way valve to make the ambient air pass through the first flow controller and the filter in sequenceThe ozone removing device and the humidity control system finally enter the reaction chamber through the one-way valve; and simultaneously, the temperature and humidity monitoring device and the circulating fan are started, and the temperature and humidity in the reaction chamber are controlled to be consistent with the environment.
9. Ambient air O as claimed in claim 8 3 A method for measuring a formation potential, comprising: the specific steps for starting the measurement are that a light source, a photolysis efficiency measuring device, an ozone monitoring device and a NOx monitoring device are turned on, and O in the reaction chamber is recorded 3 The concentration and the concentration of NOx are controlled by a second flow controller according to the experiment requirement, NO with specific concentration is added into the reaction chamber 2 (ii) a And recording the reading of the ozone monitoring equipment until the reading of the ozone monitoring equipment does not rise any more; determination of O in ambient air under specific conditions 3 A potential is generated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111070193.4A CN113899846B (en) | 2021-09-13 | 2021-09-13 | Device and method for measuring ozone generation potential of ambient air |
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| CN202111070193.4A CN113899846B (en) | 2021-09-13 | 2021-09-13 | Device and method for measuring ozone generation potential of ambient air |
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| CN113899846A CN113899846A (en) | 2022-01-07 |
| CN113899846B true CN113899846B (en) | 2022-07-26 |
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| US7045359B2 (en) * | 2002-07-26 | 2006-05-16 | Novanox, Llc | Method and apparatus to detect a gas by measuring ozone depletion |
| CN108008070A (en) * | 2017-11-22 | 2018-05-08 | 沈阳大学 | It is a kind of that photochemically reactive analysis method is occurred to atmosphere organic pollutant |
| CN110057983B (en) * | 2019-05-20 | 2020-08-11 | 华北电力大学 | Ozone source analysis method based on observation data and chemical mechanism |
| CN111855602B (en) * | 2020-07-29 | 2023-04-25 | 北京大学 | System for measuring ozone generation rate in field environment |
| CN113376158B (en) * | 2021-06-17 | 2024-10-15 | 暨南大学 | System and method for measuring ozone generation rate and ozone generation sensitivity on line |
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