A detection device and detection method for atmospheric oxidizing indicator factor

Abstract

The embodiment of the present invention relates to an atmospheric oxidizing indicator factor detection device and a detection method, the device comprises a first air flow path, a second air flow path, a third air flow path, an ozone flow path, a nitric oxide flow path, a first mixing chamber, a second mixing chamber, a detection flow path, a nitrogen dioxide detector and a sampling device; the sampling device can collect air samples through the first air flow path, the second air flow path and the third air flow path; the first air flow path is equipped with a catalytic device, the catalytic device is used to catalytically reduce NOy in the air sample to NO; the ozone flow path is equipped with an ozone supply device; the first air flow path, the second air flow path and the ozone flow path are respectively connected to the first mixing chamber; the nitric oxide flow path is equipped with a nitric oxide supply device; the third air flow path and the nitric oxide flow path are respectively connected to the second mixing chamber; the first mixing chamber and the second mixing chamber are connected to the nitrogen dioxide detector via the detection flow path. The device has high detection accuracy, accuracy and reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of atmospheric environment detection, and in particular relates to an atmospheric oxidizing indicator factor detection device and a detection method. Background Art

[0002] Atmospheric photochemical smog is a strong oxidizing pollutant composed of secondary pollutants mainly composed of ozone. Affected by the increase in human activities, the abundant nitrogen oxides and volatile organic compounds in the urban and regional atmosphere react under the sun to produce some highly oxidizing gases. In China's rapidly developing regions and megacities, the atmospheric oxidation level is relatively high, and it is very necessary to detect atmospheric oxidation indicators. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a detection device and a detection method for an atmospheric oxidizing indicator factor.

[0004] An embodiment of the present invention proposes an atmospheric oxidizability indicator factor detection device, comprising a first air flow path, a second air flow path, a third air flow path, an ozone flow path, a nitric oxide flow path, a first mixing chamber, a second mixing chamber, a detection flow path, a nitrogen dioxide detector and a sampling device; the sampling device can collect air samples through the first air flow path, the second air flow path and the third air flow path; the first air flow path is provided with a catalytic device, and the catalytic device is used to catalytically reduce NOy in the air sample to NO; the ozone flow path is provided with an ozone supply device; the first air flow path, the second air flow path and the ozone flow path are respectively connected to the first mixing chamber; the nitric oxide flow path is provided with a nitric oxide supply device; the third air flow path and the nitric oxide flow path are respectively connected to the second mixing chamber; the first mixing chamber and the second mixing chamber are connected to the nitrogen dioxide detector via the detection flow path.

[0005] Furthermore, the first air flow path is equipped with a first enrichment device; the second air flow path is equipped with a second enrichment device; the third air flow path is equipped with a third enrichment device; the first enrichment device, the second enrichment device and the third enrichment device are respectively used to enrich air samples.

[0006] Furthermore, the first enrichment device, the second enrichment device and the third enrichment device are all transparent enrichment chambers, and the inner diameter of the enrichment chamber is larger than the pipe diameter of the corresponding air flow path.

[0007] Furthermore, the enrichment chamber is made of quartz material.

[0008] Furthermore, the second enrichment device has a detachable first light shielding component, and the third enrichment device has a detachable second light shielding component; the second air flow path is also connected to the second mixing chamber.

[0009] Further, the first air flow path is configured with a first electrically controlled valve; the third air flow path is configured with a third electrically controlled valve; the ozone flow path is configured with a fourth electrically controlled valve; the nitric oxide flow path is configured with a fifth electrically controlled valve; the detection flow path is configured with a first three-way electrically controlled valve, or the detection flow path includes a first detection flow path and a second detection flow path, the first mixing chamber is connected to the nitrogen dioxide detector via the first detection flow path, the second mixing chamber is connected to the nitrogen dioxide detector via the second detection flow path, the first detection flow path and the second detection flow path are respectively configured with electrically controlled valves; the second air flow path is connected to the first mixing chamber and the second mixing chamber via the second three-way electrically controlled valve, or the second air flow path is connected to the first mixing chamber via the second electrically controlled valve, and is connected to the second mixing chamber via the sixth electrically controlled valve.

[0010] Furthermore, the ozone flow path is also configured with a first flow controller; the nitric oxide flow path is also configured with a second flow controller; the sampling device is connected to the nitrogen dioxide detector via the sampling flow path, for collecting air samples and sending the gas to be tested into the nitrogen dioxide detector, and the sampling flow path is configured with a third flow controller.

[0011] Furthermore, the detection device also includes a controller, which is used to control the opening and closing of the sampling device, the opening and closing of the ozone supply device, the opening and closing of the nitric oxide supply device, the opening and closing of the catalytic device and the catalytic temperature, the opening and closing of the nitrogen dioxide detector, each electronically controlled valve and each flow controller.

[0012] The embodiment of the present invention further provides a method for detecting the total atmospheric oxidant generation rate using the above-mentioned atmospheric oxidizing indicator factor detection device, comprising the following steps:

[0013] S1, the air sample enters the third enrichment device through the third air flow path, enters the second mixing chamber after enrichment, and the NO gas enters the second mixing chamber through the nitric oxide flow path to react with O3 in the air sample;

[0014] S2. The gas to be tested obtained by the reaction enters the nitrogen dioxide detector to obtain the volume fraction of Ox in the atmosphere. After calculation, the total atmospheric oxidant generation rate dOx / dt is obtained.

[0015] The embodiment of the present invention further provides a method for detecting the atmospheric total oxidant generation efficiency using the atmospheric oxidizing indicator factor detection device, comprising the following steps:

[0016] S1. The air sample enters the first enrichment device through the first air flow path, and enters the catalytic device after enrichment. After NOy in the air sample is catalytically reduced to NO, it enters the first mixing chamber. After ozone enters the first mixing chamber through the ozone flow path and reacts with NO, the gas to be tested enters the nitrogen dioxide detector; the air sample enters the second enrichment device through the third air flow path, and NO gas enters the second mixing chamber through the nitric oxide flow path. After reacting with O3 in the air sample, the gas to be tested enters the nitrogen dioxide detector; after detection and calculation, the volume fraction of NOy in the atmosphere is obtained;

[0017] S2, the air sample enters the second enrichment device through the second air flow path, enters the first mixing chamber after enrichment, and the ozone enters the first mixing chamber through the ozone flow path to react with NO in the air sample, and the gas to be tested enters the nitrogen dioxide detector, and the volume fraction of NOx is obtained through detection and calculation;

[0018] S3, the air sample enters the third enrichment device through the third air flow path, enters the second mixing chamber after enrichment, NO gas enters the second mixing chamber through the nitric oxide flow path, and reacts with O3 in the air sample; the gas to be tested enters the nitrogen dioxide detector to obtain the volume fraction of Ox;

[0019] S4. According to the volume fractions of Ox, NOy and NOx in the atmosphere at time t and time t0, the volume fraction differences of the three within the sampling time, Ox(t-t0), NOy(t-t0) and NOx(t-t0), are obtained. Multiple detections are performed to obtain multiple volume fraction differences, Ox(t-t0), NOy(t-t0) and NOx(t-t0). Linear regression is performed on multiple Ox(t-t0) and [NOy(t-t0)-NOx(t-t0)] values ​​to obtain a linear regression curve. The slope k of the curve is the total oxidant generation efficiency of the atmosphere. The source of ozone in the atmosphere can be analyzed based on the k value.

[0020] Beneficial effects of the embodiments of the present invention: The atmospheric oxidizing indicator factor detection device proposed in the embodiments of the present invention can be used to detect the atmospheric oxidizing indicator factor and can be used for total oxidant source analysis. The system has high precision, accuracy and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of an atmospheric oxidizability indicator factor detection device proposed in an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of a control system of an atmospheric oxidizability indicator factor detection device proposed in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. However, those skilled in the art will appreciate that the present invention is not limited to the accompanying drawings and the following embodiments.

[0024] In the present invention, the symbol "Ox" represents the total atmospheric oxidants. Among the various oxidants contained in the atmosphere, O3 and NO2 account for the vast majority. Therefore, the present invention uses O3 and NO2 to represent the total atmospheric oxidants "Ox" to characterize the atmospheric oxidizing capacity.

[0025] In the present invention, the symbol "NOx" represents NO and NO2, the symbol "NOz" represents an oxidation product of NOx, and the symbol "NOy" represents a combination of NOx and NOz.

[0026] In the present invention, the atmospheric oxidizing index refers to parameters related to the oxidizing property of the atmosphere, including but not limited to the total oxidant generation efficiency, the total oxidant generation rate, and the volume fraction of oxidants such as NOx, NOy, Ox, and NO2 in the atmosphere.

[0027] Example 1 Atmospheric Oxidation Indicator Detection Device

[0028] Reference Figure 1 This embodiment proposes an atmospheric oxidizing indicator factor detection device, including a first air flow path 10, a second air flow path 20, a third air flow path 30, an ozone flow path 40, a nitric oxide flow path 50, a first mixing chamber 60, a second mixing chamber 70, a nitrogen dioxide detector 90, and a sampling flow path S; the first air flow path 10, the second air flow path 20 and the third air flow path 30 are used to collect air samples.

[0029] The first air flow path 10 is provided with a first enrichment device 11, a catalytic device 12 and a first electrically controlled valve 13. The first enrichment device 11 is used to enrich the air sample. The catalytic device 12 is used to catalytically reduce NOy in the air sample to NO.

[0030] The second air flow path 20 is provided with a second enrichment device 21 and a second electric control valve 22. The second enrichment device 21 is used to enrich the air sample.

[0031] The ozone flow path 40 is provided with an ozone supply device 41, a first flow controller 42 and a fourth electric control valve 43. The ozone supply device 41, for example, is an ozone generator for supplying ozone.

[0032] The first air flow path 10, the second air flow path 20 and the ozone flow path 40 are respectively connected to the first mixing chamber 60, and the first mixing chamber 60 is used as a reaction chamber for the first air flow path 10 and the ozone supplied by the ozone flow path 40, or the outflow gas of the second air flow path 20 and the ozone supplied by the ozone flow path 40.

[0033] The third air flow path 30 is provided with a third enrichment device 31 and a third electrically controlled valve 32. The third enrichment device 31 is used to enrich air samples.

[0034] The nitric oxide flow path 50 is provided with a nitric oxide supply device 51, a second flow controller 52 and a fifth electrically controlled valve 53. The nitric oxide supply device 51 is, for example, a nitric oxide gas cylinder or other device capable of producing nitric oxide, for supplying excess nitric oxide gas to react with ozone.

[0035] The third air flow path 30 and the nitric oxide flow path 50 are respectively communicated with a second mixing chamber 70 , and the second mixing chamber 70 serves as a reaction chamber for the outflow gas of the third air flow path 30 and the nitric oxide gas supplied from the nitric oxide flow path 50 .

[0036] The first mixing chamber 60 and the second mixing chamber 70 are connected to the nitrogen dioxide detector 90 via the first three-way electrically controlled valve T1 and the detection flow path 80. In another embodiment, the detection flow path 80 includes a first detection flow path and a second detection flow path, and the first mixing chamber 60 and the second mixing chamber 70 can also be connected to the nitrogen dioxide detector 90 through the first detection flow path and the second detection flow path, respectively, and electrically controlled valves are respectively provided on the first detection flow path and the second detection flow path to control the flow path on and off.

[0037] The sampling flow path S is equipped with a third flow controller 91 and a sampling device 92, which are used to collect air samples and send the gas to be tested into the nitrogen dioxide detector 90. The gas to be tested refers to the gas entering the nitrogen dioxide detector 90, such as an air sample or a mixed gas obtained after the air sample is reacted. The sampling device 92 is, for example, a sampling pump, which is used to collect air samples. The nitrogen dioxide detector 90 is, for example, an ion chromatograph or a cavity ring-down spectrometer.

[0038] The first enrichment device 11, the second enrichment device 21 and the third enrichment device 31 are enrichment chambers made of quartz material, for example, and the inner diameter of the enrichment chamber is larger than the diameter of the flow path. In this way, the injection volume can be increased, and after the pipeline in the flow path is narrowed, the air sample passes through the pipeline quickly; since the inner diameter of the enrichment chamber is larger than the diameter of the flow path, the water vapor in the air condenses when it is cold and deposits in the enrichment chamber, thereby eliminating the interference of water vapor; the enrichment chamber made of quartz material is a transparent enrichment chamber, which is convenient for observation, and when detecting the volume fraction of Ox in the atmosphere, since the enrichment chamber is transparent, it can receive light in the enrichment chamber, and the volume fraction of Ox in the actual atmospheric light environment can be measured.

[0039] Preferably, the second air flow path 20 is also connected to the second mixing chamber 70. For example, the second air flow path 20 is connected to the first mixing chamber 60 and the second mixing chamber 70 respectively through the second three-way electrically controlled valve T2 (the second electrically controlled valve 22 is replaced by the second three-way electrically controlled valve T2, thereby increasing the flow path branch between the second air flow path and the second mixing chamber 70), or is connected to the second mixing chamber 70 through the sixth electrically controlled valve; so that the air sample in the second air flow path 20 can choose to enter the first mixing chamber 60 or the second mixing chamber 70 according to the analysis needs; the second enrichment device 21 is provided with a detachable first light shielding component, and the third enrichment device 31 is provided with a detachable second light shielding component, and the first light shielding component and the second light shielding component can respectively make the second enrichment device 21 and the third enrichment device 31 in a dark room state without being irradiated by light. The detachable first light shielding component and the second light shielding component can be installed or uninstalled as needed. When the first light shielding component or the second light shielding component is installed, the sample air is not affected by light and further undergoes a photochemical reaction.

[0040] Preferably, each electrically controlled valve is a solenoid valve.

[0041] Preferably, the atmospheric oxidizability indicator factor detection device further comprises a controller, referring to Figure 2 The control system schematic diagram shown in the figure, the controller is used to control the opening and closing of the sampling device, the opening and closing of the ozone supply device, the opening and closing of the nitric oxide supply device, the opening and closing of the catalytic device and the catalytic temperature, the opening and closing of the nitrogen dioxide detector, each electric control valve and each flow controller. So as to control the collection of air samples, the supply of ozone and nitric oxide, the opening and closing of the catalytic device and the catalytic temperature, the processing of air samples, the detection of the gas to be tested and data processing, etc. As a result, the detection device realizes automatic control and can detect multiple different parameters related to atmospheric oxidizability according to the analysis needs (detailed description is as follows).

[0042] The multiple flow paths of the atmospheric oxidizing indicator factor detection device of this embodiment are combined with the first mixing chamber, the second mixing chamber and the nitrogen dioxide detector, and can be used to detect various atmospheric oxidizing indicator factors, including but not limited to atmospheric oxidizing indicator factors such as the volume fraction of NOy, the volume fraction of Ox and the volume fraction of NOx in the atmosphere. After data processing, atmospheric oxidizing indicator factors such as the total atmospheric oxidant generation rate and the total atmospheric oxidant generation efficiency can also be obtained.

[0043] The first air flow path 10 can be used to detect the volume fraction of NOy in the atmosphere. The air sample is enriched by the first enrichment device 11 and then enters the catalytic device 12. The NOy in the air is catalytically reduced and converted into NO and then enters the first mixing chamber 60, where it completely reacts with the added excess O3 to generate NO2. The NO2 is then detected by a nitrogen dioxide detector, and the volume fraction of NOy in the atmosphere is obtained after data processing.

[0044] Similarly, the second air flow path 20 can be used to detect the volume fraction of NOx in the atmosphere, and the third air flow path 30 can be used to detect the volume fraction of Ox in the atmosphere.

[0045] According to the volume fraction of Ox in the air, the total atmospheric oxidant generation rate dOx / dt can be obtained by calculation, and the minimum time resolution can reach 2s.

[0046] According to the volume fractions of Ox, NOy and NOx in the atmosphere at time t and time t0, the volume fraction difference of Ox(t-t0), NOy(t-t0) and NOx(t-t0) within the sampling time is obtained (time t0 is the sampling start time, time t is the sampling end time, the same below). The minimum time resolution is minute. Multiple detections are performed to obtain multiple volume fraction differences of Ox(t-t0), NOy(t-t0) and NOx(t-t0). Linear regression is performed on multiple Ox(t-t0) values ​​and [NOy(t-t0)-NOx(t-t0)] values ​​to obtain a linear regression curve. The slope of the curve is the total atmospheric oxidant generation efficiency.

[0047] By using the second air flow path 20, the third air flow path 30, the nitric oxide flow path 50 and the first shading component or the second shading component in parallel in the preferred embodiment, the total atmospheric oxidant generation rate dOx / dt of the air in different regions under the same lighting conditions can be detected, and the air oxidation conditions in different regions can be compared. Specifically, two air samples collected in the target region enter the second air flow path 20 and the third air flow path 30 respectively, one of the enrichment devices is shielded by the shading component, and the air sample in the enrichment device does not undergo photochemical reaction. After a preset time, the total atmospheric oxidant generation rate dOx / dt of the target region is obtained by detection, and the air sample in the enrichment device of the other flow path continues to undergo photochemical reaction after actual illumination. After the same preset time, the air sample is detected to obtain the target total atmospheric oxidant generation rate dOx / dt; the difference between the dOx / dt of the two flow paths is the ozone generation rate of the target region, and the comparison of dOx / dt in multiple regions can study the strength of the regional atmospheric oxidation capacity.

[0048] Next, the present invention uses the following examples to specifically illustrate how to use the atmospheric oxidizing indicator factor detection device of this embodiment to detect the atmospheric oxidizing indicator factor.

[0049] Example 2: Method for detecting the rate of generation of total atmospheric oxidants

[0050] This embodiment provides a method for detecting the total atmospheric oxidant generation rate, using the atmospheric oxidizing indicator factor detection device of the above embodiment 1, comprising the following steps:

[0051] The controller controls the detection device to enter the atmospheric total oxidant generation rate detection state;

[0052] An air sample is collected through the third air flow path 30 , and the air sample enters the third enrichment device 31 along the third air flow path 30 , and the air sample is enriched and enters the second mixing chamber 70 ;

[0053] Excess NO gas enters the second mixing chamber 70 through the nitric oxide flow path and reacts with O3 in the air sample to generate NO2;

[0054] The gas to be tested obtained by the reaction enters the nitrogen dioxide detector 90 to obtain the volume fraction of NO2, that is, the volume fraction of Ox in the atmosphere. After calculation, the total atmospheric oxidant generation rate dOx / dt can be obtained in real time. The minimum time resolution is 2s.

[0055] The specific working method of using the above-mentioned detection device to detect the total atmospheric oxidant generation rate is as follows: the controller sends a control instruction to detect the total atmospheric oxidant generation rate, and the detection device enters the total atmospheric oxidant generation rate detection state; the third electrically controlled valve 32 is opened, and the first three-way electrically controlled valve T1 is adjusted to the total oxidant generation rate detection path; the sampling pump is started, the third flow controller 91 starts to run, and the sampling pump continues to run. The air sample enters the second mixing chamber 70 after being enriched by the third enrichment device 31 along the third air flow path 30; the fifth electrically controlled valve 53 is opened, and the second flow controller 52 controls the NO gas flow rate, and the NO gas enters the second mixing chamber 70 to react with O3 in the air sample to generate NO2; the sample enters the nitrogen dioxide detector 90 from the second mixing chamber 70 to obtain the volume fraction of NO2, that is, the volume fraction of Ox, and the total atmospheric oxidant generation rate dOx / dt is obtained in real time by calculation, with a minimum time resolution of 2s.

[0056] Example 3: Method for detecting the efficiency of total atmospheric oxidant generation

[0057] This embodiment provides a method for detecting the total atmospheric oxidant generation efficiency, using the atmospheric oxidizing indicator factor detection device of the above embodiment 1, comprising the following steps:

[0058] The controller controls the detection device to enter the atmospheric total oxidant generation efficiency detection state;

[0059] An air sample is collected through the first air flow path 10, and the air sample enters the first enrichment device 11. After enrichment, the air sample enters the catalytic device 12. After the NOy in the air sample is catalytically reduced to NO, the sample enters the first mixing chamber 60. The ozone supply device supplies excess ozone to the first mixing chamber 60 through the ozone flow path 40. The ozone reacts with NO in the gas to obtain NO2, which enters the nitrogen dioxide detector 90; the excess NO gas enters the second mixing chamber 70 through the nitric oxide flow path 50, reacts with O3 in the air sample to generate NO2, and enters the nitrogen dioxide detector 90; after detection and calculation, the volume fraction of NOy in the atmosphere is obtained.

[0060] Air samples are collected through the second air flow path 20, and the air samples enter the second enrichment device 21. After enrichment, they enter the first mixing chamber 60. The ozone supply device 41 supplies excess ozone to the first mixing chamber 60 through the ozone flow path 40. The ozone and NO in the air sample are converted into NO2, and then enter the nitrogen dioxide detector 90. After detection and calculation, the volume fraction of NOx is obtained.

[0061] An air sample is collected through the third air flow path 30, and the air sample enters the third enrichment device 31, and enters the second mixing chamber after enrichment; excess NO gas enters the second mixing chamber 70 through the nitric oxide flow path 50, and reacts with O3 in the air sample to generate NO2; after the reaction, the gas to be tested enters the nitrogen dioxide detector 90 to obtain the volume fraction of NO2, that is, the volume fraction of Ox in the atmosphere.

[0062] The volume fractions of Ox, NOy and NOx in the atmosphere at time t and time t0 are detected respectively, and the volume fraction differences of the three within the sampling time, Ox(t-t0), NOy(t-t0) and NOx(t-t0), are obtained. Multiple detections are performed to obtain multiple volume fraction differences, Ox(t-t0), NOy(t-t0) and NOx(t-t0). Linear regression is performed on multiple Ox(t-t0) and [NOy(t-t0)-NOx(t-t0)] values ​​to obtain a linear regression curve. The slope k of the curve is the total oxidant generation efficiency in the atmosphere. When k>8, NOx dominates the production of ozone in the atmosphere. When k<8, VOCs (volatile organic compounds) dominate the production of ozone in the atmosphere, and the minimum time resolution is minutes.

[0063] The working mode of the detection device is similar to that of Example 2 and will not be described in detail.

[0064] In combination with the above embodiments, the technical effects of the present invention are described as follows:

[0065] The atmospheric oxidizability indicator factor detection device of the embodiment of the present invention is an integrated detection system that can realize online or offline detection. It uses a controller to generate and send industrial control instructions, and uniformly controls enriched air, flow path switches or switching, precise control of flow controllers, collection and analysis of air samples, etc. It can detect different atmospheric oxidizability indicator factors as needed, and can analyze the source of ozone in the atmosphere.

[0066] The atmospheric oxidizing indicator factor detection device of the embodiment of the present invention can evaluate in situ the total atmospheric oxidant generation rate in different time periods and perform sensitivity analysis on ozone precursors, and obtain effective long-term synchronous observation data of Ox, NOx and NOy. It is suitable for studying prominent environmental problems such as complex atmospheric pollution, and is also suitable for implementing comprehensive control of multiple atmospheric pollutants and deepening photochemical pollution control. It also provides an effective solution for obtaining measured data and parameters for verifying models.

[0067] In the atmospheric oxidizing indicator factor detection device of the embodiment of the present invention, each flow path is switched by an electric control valve, so that the volume fractions of Ox, NOx and NOy can be detected simultaneously by a nitrogen dioxide detector, and system calibration can be taken into account. By controlling the combination of different states of the electric control valve, the atmospheric total oxidant generation efficiency and the atmospheric total oxidant generation efficiency can be obtained respectively, and the atmospheric oxidizing indicator factor analysis and system calibration can be switched, which provides a reliable guarantee for accurate measurement and data quality.

[0068] The atmospheric oxidizability indicator factor detection device of the embodiment of the present invention has high system precision, accuracy and reliability, and can reduce the labor intensity and workload of observers.

[0069] The above is an explanation of the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for detecting the total atmospheric oxidant generation rate using an atmospheric oxidizing indicator factor detection device, characterized in that: The detection device comprises: a first air flow path, a second air flow path, a third air flow path, an ozone flow path, a nitric oxide flow path, a first mixing chamber, a second mixing chamber, a detection flow path, a nitrogen dioxide detector, and a sampling device; The sampling device is capable of collecting air samples through the first air flow path, the second air flow path, and the third air flow path; The first air flow path is provided with a catalytic device, and the catalytic device is used to catalytically reduce NOy in the air sample to NO; the ozone flow path is provided with an ozone supply device; the first air flow path, the second air flow path and the ozone flow path are respectively connected to the first mixing chamber; The nitric oxide flow path is provided with a nitric oxide supply device; the third air flow path and the nitric oxide flow path are respectively connected to the second mixing chamber; The first mixing chamber and the second mixing chamber are connected to a nitrogen dioxide detector via a detection flow path; The first air flow path is equipped with a first enrichment device; the second air flow path is equipped with a second enrichment device; the third air flow path is equipped with a third enrichment device; the first enrichment device, the second enrichment device and the third enrichment device are respectively used to enrich air samples; The first enrichment device, the second enrichment device and the third enrichment device are all transparent enrichment chambers, and the inner diameter of the enrichment chamber is larger than the pipe diameter of the corresponding air flow path; The method comprises the following steps: S1, the air sample enters the third enrichment device through the third air flow path, enters the second mixing chamber after enrichment, and the NO gas enters the second mixing chamber through the nitric oxide flow path to react with O3 in the air sample; S2. The gas to be tested obtained by the reaction enters the nitrogen dioxide detector to obtain the volume fraction of Ox in the atmosphere. After calculation, the total atmospheric oxidant generation rate dOx / dt is obtained.

2. A method for detecting the total atmospheric oxidant generation efficiency using an atmospheric oxidizing indicator factor detection device, characterized in that: The detection device comprises: a first air flow path, a second air flow path, a third air flow path, an ozone flow path, a nitric oxide flow path, a first mixing chamber, a second mixing chamber, a detection flow path, a nitrogen dioxide detector, and a sampling device; The sampling device is capable of collecting air samples through the first air flow path, the second air flow path, and the third air flow path; The first air flow path is provided with a catalytic device, and the catalytic device is used to catalytically reduce NOy in the air sample to NO; the ozone flow path is provided with an ozone supply device; the first air flow path, the second air flow path and the ozone flow path are respectively connected to the first mixing chamber; The nitric oxide flow path is provided with a nitric oxide supply device; the third air flow path and the nitric oxide flow path are respectively connected to the second mixing chamber; The first mixing chamber and the second mixing chamber are connected to a nitrogen dioxide detector via a detection flow path; The first air flow path is equipped with a first enrichment device; the second air flow path is equipped with a second enrichment device; the third air flow path is equipped with a third enrichment device; the first enrichment device, the second enrichment device and the third enrichment device are respectively used to enrich air samples; The first enrichment device, the second enrichment device and the third enrichment device are all transparent enrichment chambers, and the inner diameter of the enrichment chamber is larger than the pipe diameter of the corresponding air flow path; The method comprises the following steps: S1. The air sample enters the first enrichment device through the first air flow path, and enters the catalytic device after enrichment. After NOy in the air sample is catalytically reduced to NO, it enters the first mixing chamber. After ozone enters the first mixing chamber through the ozone flow path and reacts with NO, the gas to be tested enters the nitrogen dioxide detector; the air sample enters the second enrichment device through the third air flow path, and NO gas enters the second mixing chamber through the nitric oxide flow path. After reacting with O3 in the air sample, the gas to be tested enters the nitrogen dioxide detector; after detection and calculation, the volume fraction of NOy in the atmosphere is obtained; S2, the air sample enters the second enrichment device through the second air flow path, enters the first mixing chamber after enrichment, and the ozone enters the first mixing chamber through the ozone flow path to react with NO in the air sample, and the gas to be tested enters the nitrogen dioxide detector, and the volume fraction of NOx is obtained through detection and calculation; S3, the air sample enters the third enrichment device through the third air flow path, enters the second mixing chamber after enrichment, NO gas enters the second mixing chamber through the nitric oxide flow path, and reacts with O3 in the air sample; the gas to be tested enters the nitrogen dioxide detector to obtain the volume fraction of Ox; S4. According to the volume fractions of Ox, NOy and NOx in the atmosphere at time t and time t0, the volume fraction differences of the three within the sampling time, Ox(t-t0), NOy(t-t0) and NOx(t-t0), are obtained. Multiple detections are performed to obtain multiple volume fraction differences, Ox(t-t0), NOy(t-t0) and NOx(t-t0). Linear regression is performed on multiple Ox(t-t0) and [NOy(t-t0)-NOx(t-t0)] values ​​to obtain a linear regression curve. The slope k of the curve is the total oxidant generation efficiency of the atmosphere. The source of ozone in the atmosphere can be analyzed based on the k value.

3. The method according to claim 1 or 2, characterized in that The enrichment chamber is made of quartz material.

4. The method according to claim 1 or 2, characterized in that: The second enrichment device has a detachable first light shielding component, and the third enrichment device has a detachable second light shielding component; the second air flow path is also communicated with the second mixing chamber.

5. The method according to claim 4, characterized in that The first air flow path is configured with a first electrically controlled valve; the third air flow path is configured with a third electrically controlled valve; the ozone flow path is configured with a fourth electrically controlled valve; the nitric oxide flow path is configured with a fifth electrically controlled valve; the detection flow path is configured with a first three-way electrically controlled valve, or the detection flow path includes a first detection flow path and a second detection flow path, the first mixing chamber is connected to the nitrogen dioxide detector via the first detection flow path, the second mixing chamber is connected to the nitrogen dioxide detector via the second detection flow path, the first detection flow path and the second detection flow path are respectively configured with electrically controlled valves; the second air flow path is connected to the first mixing chamber and the second mixing chamber via the second three-way electrically controlled valve, or the second air flow path is connected to the first mixing chamber via the second electrically controlled valve, and is connected to the second mixing chamber via the sixth electrically controlled valve.

6. The method according to claim 5, characterized in that The ozone flow path is also equipped with a first flow controller; the nitric oxide flow path is also equipped with a second flow controller; the sampling device is connected to the nitrogen dioxide detector via the sampling flow path, and is used to collect air samples and send the gas to be tested into the nitrogen dioxide detector. The sampling flow path is equipped with a third flow controller.

7. The method according to claim 6, characterized in that The detection device also includes a controller, which is used to control the opening and closing of the sampling device, the opening and closing of the ozone supply device, the opening and closing of the nitric oxide supply device, the opening and closing of the catalytic device and the catalytic temperature, the opening and closing of the nitrogen dioxide detector, each electronically controlled valve and each flow controller.

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