CN209460233U

CN209460233U - A kind of oxidizing capacity indicator detection device

Info

Publication number: CN209460233U
Application number: CN201920092095.2U
Authority: CN
Inventors: 吉东生; 徐小娟; 王跃思
Original assignee: Institute of Atmospheric Physics of CAS
Current assignee: Institute of Atmospheric Physics of CAS
Priority date: 2019-01-18
Filing date: 2019-01-18
Publication date: 2019-10-01
Anticipated expiration: 2029-01-18

Abstract

The utility model embodiment is related to a kind of oxidizing capacity indicator detection device, and described device includes the first air flow circuit, the second air flow circuit, third air flow circuit, ozone flow path, nitric oxide flow path, the first mixing chamber, the second mixing chamber, detection flow path, Nitrogen dioxide testing device and sampling apparatus；Sampling apparatus can acquire air sample through first air flow circuit, the second air flow circuit and third air flow circuit；First air flow circuit is configured with catalytic unit, and catalytic unit is used to the NOy catalysis in air sample being reduced to NO；The ozone flow path is configured with ozone supply means；First air flow circuit, the second air flow circuit and ozone flow path are connected to the first mixing chamber respectively；Nitric oxide flow arrangement has nitric oxide feedway；Third air flow circuit and nitric oxide flow path are connected to the second mixing chamber respectively；First mixing chamber and the second mixing chamber are through detecting fluid communication Nitrogen dioxide testing device.The device detection accuracy is high, accurate and reliable.

Description

A kind of oxidizing capacity indicator detection device

Technical field

The utility model belongs to atmospheric environment detection technique field, and in particular to a kind of oxidizing capacity indicator detection Device.

Background technique

Atmospheric Photochemical Smog is strong oxidizing property pollutant composed by secondary pollution based on ozone.It is living by the mankind Move increased influence, in city and regional atmospheric nitrogen oxides and volatile organic matter abundant shining upon it is lower occur it is anti- It answers, produces the very strong gas of some oxidisability.In the region and megalopolis of the development of Chinese fast, economical, the oxidation of atmosphere Property level it is higher, detection oxidizing capacity index it is very necessary.

Utility model content

The utility model embodiment is designed to provide a kind of oxidizing capacity indicator detection device and detection side Method.

The utility model embodiment proposes a kind of oxidizing capacity indicator detection device, including the first air stream Road, the second air flow circuit, third air flow circuit, ozone flow path, nitric oxide flow path, the first mixing chamber, the second mixing chamber, detection Flow path, Nitrogen dioxide testing device and sampling apparatus；The sampling apparatus can be through first air flow circuit, the second air flow circuit Air sample is acquired with third air flow circuit；First air flow circuit is configured with catalytic unit, and the catalytic unit is used for will NOy catalysis in air sample is reduced to NO；The ozone flow path is configured with ozone supply means；First air flow circuit, Second air flow circuit and ozone flow path are connected to the first mixing chamber respectively；The nitric oxide flow arrangement has nitric oxide supply Device；The third air flow circuit and nitric oxide flow path are connected to the second mixing chamber respectively；First mixing chamber and second Mixing chamber is through detecting fluid communication Nitrogen dioxide testing device.

Further, first air flow circuit is configured with the first enriching apparatus；Second air flow circuit is configured with second Enriching apparatus；The third air flow circuit is configured with third enriching apparatus；First enriching apparatus, the second enriching apparatus and Three enriching apparatus are respectively used to enriched air sample.

Further, first enriching apparatus, the second enriching apparatus and third enriching apparatus are transparent enrichment chamber, described The internal diameter for being enriched with chamber is greater than the caliber of respective air flow path.

Further, the enrichment chamber is made of quartz material.

Further, second enriching apparatus has dismountable first light-blocking member, and the third enriching apparatus has Dismountable second light-blocking member；Second air flow circuit is also connected to second mixing chamber.

Further, first air flow circuit is configured with the first electrically-controlled valve；The third air flow circuit is configured with third electricity Control valve；The ozone flow path is configured with the 4th electrically-controlled valve；The nitric oxide flow arrangement has the 5th electrically-controlled valve；The detection stream Road is configured with the first threeway electrically-controlled valve, alternatively, the detection flow path includes the first detection flow path and second detects flow path, described the One mixing chamber is connected to through the first detection flow path with Nitrogen dioxide testing device, and second mixing chamber is through the second detection flow path and dioxy Change Nitrogen detector connection, the first detection flow path and the second detection flow path are each configured with electrically-controlled valve；The second air flow circuit warp Second threeway electrically-controlled valve is respectively communicated with the first mixing chamber and the second mixing chamber, alternatively, the second air flow circuit connects through the second electrically-controlled valve Logical first mixing chamber is connected to the second mixing chamber through the 6th electrically-controlled valve.

Further, the ozone flow path is also configured with first flow controller；The nitric oxide flow path is also configured with Two flow controllers；The sampled flow path of sampling apparatus is connected to Nitrogen dioxide testing device, for acquiring air sample, and will Under test gas is sent into the Nitrogen dioxide testing device, and the sampling flow path is configured with third flow controller.

Further, the detection device further includes controller, and the controller is used to control opening and closing, the ozone of sampling apparatus The opening and closing of feedway, the opening and closing of nitric oxide feedway, the opening and closing of catalytic unit and catalytic temperature, Nitrogen dioxide testing device Opening and closing, each electrically-controlled valve and each flow controller.

The utility model embodiment the utility model has the advantages that the utility model embodiment propose oxidizing capacity indicator inspection Surveying device can be used in detecting oxidizing capacity indicator, can be used in total oxidant source analysis, and system accuracy is high, accurate Reliably.

Detailed description of the invention

Fig. 1 is the oxidizing capacity indicator detection device schematic diagram that the utility model embodiment proposes；

Fig. 2 is the control system signal for the oxidizing capacity indicator detection device that the utility model embodiment proposes Figure.

Specific embodiment

For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific embodiment, and Referring to attached drawing, the utility model is further described.But as known to those skilled in the art, the utility model is not limited to Attached drawing and following embodiment.

In the utility model, symbol " Ox " represents atmosphere total oxidant, in a variety of oxidants contained by atmosphere, O₃And NO₂It accounts for absolutely Most of, therefore, the utility model uses O₃And NO₂Atmosphere total oxidant " Ox " is represented, for characterizing atmospheric oxidn ability.

In the utility model, symbol " NOx " represents NO and NO₂, symbol " NOz " represents the oxidation product of NOx, symbol " NOy " represents the set of NOx and NOz.

In the utility model, oxidizing capacity indicator refers to parameter relevant to the oxidisability of atmosphere, including but not It is limited to total oxidant formation efficiency, total oxidant generating rate, NOx, NOy, Ox, NO₂The volume point of equal oxidants in an atmosphere Number.

1 oxidizing capacity indicator detection device of embodiment

Referring to Fig.1, the present embodiment proposes a kind of oxidizing capacity indicator detection device, including the first air flow circuit 10, the second air flow circuit 20, third air flow circuit 30, ozone flow path 40, nitric oxide flow path 50, the first mixing chamber 60, second Mixing chamber 70, Nitrogen dioxide testing device 90, sampling flow path S；First air flow circuit 10, the second air flow circuit 20 and third are empty Air-flow road 30 is for acquiring air sample.

First air flow circuit 10 is configured with the first enriching apparatus 11, catalytic unit 12 and the first electrically-controlled valve 13.It is described First enriching apparatus 11 is used for enriched air sample.The catalytic unit 12 is used to for the NOy catalysis in air sample being reduced to NO。

Second air flow circuit 20 is configured with the second enriching apparatus 21 and the second electrically-controlled valve 22.Second enriching apparatus 21 are used for enriched air sample.

The ozone flow path 40 is configured with ozone supply means 41, first flow controller 42 and the 4th electrically-controlled valve 43.Institute Ozone supply means 41, for example, ozone generator are stated, ozone supply is used for.

First air flow circuit 10, the second air flow circuit 20 and ozone flow path 40 are connected to the first mixing chamber 60 respectively, First mixing chamber 60 is used as the reaction chamber for the ozone that first air flow circuit 10 is supplied with ozone flow path 40, alternatively, institute The reaction chamber for the ozone that the eluting gas and ozone flow path 40 for stating the second air flow circuit 20 supply.

The third air flow circuit 30 is configured with third enriching apparatus 31 and third electrically-controlled valve 32.The third enriching apparatus 31 are used for enriched air sample.

The nitric oxide flow path 50 is automatically controlled configured with nitric oxide feedway 51, second flow controller 52 and the 5th Valve 53.The nitric oxide feedway 51, for example, nitric oxide gas cylinder or other can generate nitric oxide production device, use In the excessive nitric oxide gas of supply and ozone reaction.

The third air flow circuit 30 and nitric oxide flow path 50 are connected to the second mixing chamber 70 respectively, second mixing The nitric oxide gas that room 70 is used as the eluting gas of the third air flow circuit 30 and nitric oxide flow path 50 supplies reacts Room.

First mixing chamber 60 is connected to dioxy with detection flow path 80 through the first threeway electrically-controlled valve T1 with the second mixing chamber 70 Change Nitrogen detector 90.In another embodiment, the detection flow path 80 includes that the first detection flow path and second detect flow path, First mixing chamber 60 and the second mixing chamber 70 can also pass through the first detection flow path and the second detection fluid communication two respectively Nitrogen detector 90 is aoxidized, electrically-controlled valve is respectively set on the first detection flow path and the second detection stream road, to control flow path on-off.

The sampling flow path S is configured with third flow controller 91 and sampling apparatus 92, will be to for acquiring air sample It surveys gas and is sent into the Nitrogen dioxide testing device 90, the under test gas refers to the gas into Nitrogen dioxide testing device 90, example For example air sample or air sample it is reacted after obtained mixed gas.The sampling apparatus 92, for example, sampling pump, are used for Acquire air sample.The Nitrogen dioxide testing device 90, for example, ion chromatograph or cavity ring-down spectroscopy instrument.

First enriching apparatus 11, the second enriching apparatus 21 and third enriching apparatus 31 are, for example, made of quartz material It is enriched with chamber, the internal diameter for being enriched with chamber is greater than the caliber of flow path.Thereby, it is possible to increase sample volume, after the pipeline in flow path narrows, air Sample runs through pipeline；Since the internal diameter of enrichment chamber is greater than the caliber of flow path, after the vapor in air condenses to the cold, deposition It is intracavitary being enriched with, so as to exclude steam interference；Enrichment chamber made of quartz material is used to facilitate sight for transparent enrichment chamber When examining, and detecting the volume fraction of Ox in atmosphere, due to enrichment chamber it is transparent, be enriched with it is intracavitary can receive illumination, can survey Measure the Ox volume fraction under real atmosphere luminous environment.

Preferably, second air flow circuit 20 is also connected to second mixing chamber 70, for example, the second air flow circuit 20 By the second threeway electrically-controlled valve T2, (the second electrically-controlled valve 22 replaces with the second threeway electrically-controlled valve T2, to increase by the second air flow circuit With the flow path branch of the second mixing chamber 70) it is connected to respectively with the first mixing chamber 60 and the second mixing chamber 70, alternatively, passing through the 6th electricity Control valve is connected to the second mixing chamber 70；To which the air sample in the second air flow circuit 20 can need to select to enter according to analysis First mixing chamber 60 or the second mixing chamber 70；Second enriching apparatus 21 is provided with dismountable first light-blocking member, third Enriching apparatus 31 is provided with dismountable second light-blocking member, and first light-blocking member and the second light-blocking member can make respectively Second enriching apparatus 21 and third enriching apparatus 31 are in darkroom state, are not irradiated by light.Dismountable first light-blocking member, Two light-blocking members can according to need installation or unloading.When installing the first light-blocking member or the second light-blocking member, sample air The not influence further occurrence photochemical reaction of light.

Preferably, each electrically-controlled valve is solenoid valve.

Preferably, the oxidizing capacity indicator detection device further includes controller, is referring to control shown in Fig. 2 System schematic diagram, the controller is for controlling the opening and closing of sampling apparatus, the opening and closing of ozone supply means, nitric oxide feedway Opening and closing, catalytic unit opening and closing and catalytic temperature, the opening and closing of Nitrogen dioxide testing device, each electrically-controlled valve and each flow controller. To control the acquisition of air sample, ozone and nitric oxide supply, the opening and closing of catalytic unit and catalytic temperature, air sample Processing, the detection of under test gas and data processing etc..As a result, the detection device realize automatically control, can according to analysis needs, Detect multiple and different parameters (being described as follows) related with oxidizing capacity.

The multiple flow paths and the first mixing chamber, the second mixing chamber of the oxidizing capacity indicator detection device of the present embodiment And the combination of Nitrogen dioxide testing instrument, it can be used in the detection of a variety of oxidizing capacity indicators, including but not limited in atmosphere The oxidizing capacities indicator such as volume fraction of the volume fraction of NOy, the volume fraction of Ox and NOx, through data processing, moreover it is possible to Enough obtain the oxidizing capacities indicators such as atmosphere total oxidant generating rate, atmosphere total oxidant formation efficiency.

First air flow circuit 10 can be used in detecting the volume fraction of NOy in atmosphere, and air sample is through the first enriching apparatus 11 enrichments, enter back into catalytic unit 12, and the NOy in air is converted into after NO by catalysis reduction enters the first mixing chamber 60, and outer Add excessive O₃It is reacted completely in the first mixing chamber 60, generates NO₂, Nitrogen dioxide testing device is recycled to detect NO₂, at data Reason, obtains the volume fraction of NOy in atmosphere.

Similarly, the second air flow circuit 20 can be used in detecting the volume fraction of NOx in atmosphere, and third air flow circuit 30 can For detecting the volume fraction of Ox in atmosphere.

Atmosphere total oxidant generating rate dOx/dt can be obtained by calculating according to the volume fraction of Ox in air, when Between resolution ratio minimum up to 2s.

According to t moment and t₀The volume fraction of Ox, NOy, NOx in the atmosphere at moment, obtain Ox (t-t in the sampling time₀), NOy(t-t₀) and NOx (t-t₀) volume fraction difference (t₀Moment is sampling initial time, and t moment is sample end time, under Together), temporal resolution minimum minute, repeated detection obtain multiple Ox (t-t₀), NOy (t-t₀) and NOx (t-t₀) volume Score difference, to multiple Ox (t-t₀) value and [NOy (t-t₀)-NOx(t-t₀)] value progress linear regression, it is bent to obtain linear regression Line, the slope of a curve are atmosphere total oxidant formation efficiency.

Using in preferred embodiment, the second air flow circuit 20, third air flow circuit 30 and nitric oxide flow path 50 in parallel and It is total to can be realized atmosphere of the air of detection different regions under same illumination condition for first light-blocking member or the second light-blocking member Oxidant generating rate dOx/dt can compare the atmospheric oxidising situation of different regions.Specifically, the target that will be collected Regional two parts of air samples respectively enter the second air flow circuit 20 and third air flow circuit 30, and one of enriching apparatus is by shading Photochemical reaction do not occur for member shades light, the air sample in the enriching apparatus, after preset time, obtains objective area through detection Atmosphere total oxidant generating rate dOx/dt, the air sample in another flow path enriching apparatus continues that light occurs through practical illumination Chemical reaction detects air sample, obtains the atmosphere total oxidant generating rate dOx/dt of target after same preset time； The difference of two flow path dOx/dt is the ozone generation rate of objective area, the comparison of multiple area dOx/dt can survey region it is big The power of gas oxidability.

In the following, the utility model is illustrated and how to be referred to using the oxidizing capacity of the present embodiment by following embodiment Show that factors check device detects oxidizing capacity indicator.

2 atmosphere total oxidant generating rate detection method of embodiment

The present embodiment proposes a kind of atmosphere total oxidant generating rate detection method, using the aerial oxygen of above-described embodiment 1 The property changed indicator detection device, comprising the following steps:

Controller control detection device enters atmosphere total oxidant generating rate detecting state；

Air sample is acquired through third air flow circuit 30, air sample enters third enriching apparatus along third air flow circuit 30 31, enriched air sample, into the second mixing chamber 70；

Excessive NO gas enters the second mixing chamber 70 through nitric oxide flow path, with the O in air sample₃Reaction generates NO₂；

It reacts obtained under test gas and enters Nitrogen dioxide testing device 90, obtain NO₂Volume fraction, that is, Ox in atmosphere Volume fraction, be computed, atmosphere total oxidant generating rate dOx/dt can be obtained in real time.The minimum 2s of temporal resolution.

Specific working mode using above-mentioned detection device detection atmosphere total oxidant generating rate is as follows: controller issues The control instruction of atmosphere total oxidant generating rate is detected, detection device enters atmosphere total oxidant generating rate detecting state； Third electrically-controlled valve 32 is opened, and the first threeway electrically-controlled valve T1 is adjusted to total oxidant generating rate detection path；Pump startup is sampled, the Three flow controllers 91 bring into operation, and sampling pump continuous service, air sample is along third air flow circuit 30 by third enriching apparatus Enter the second mixing chamber 70 after 31 enrichments；5th electrically-controlled valve 53 is opened, and second flow controller 52 controls NO gas flow, NO Gas enters the second mixing chamber 70 and the O in air sample₃Reaction generates NO₂；Sample enters titanium dioxide from the second mixing chamber 70 Nitrogen detector 90 obtains NO₂Volume fraction, that is, the volume fraction of Ox passes through and calculates, and it is raw to obtain atmosphere total oxidant in real time At rate dOx/dt, the minimum 2s of temporal resolution.

3 atmosphere total oxidant formation efficiency detection method of embodiment

The present embodiment proposes a kind of atmosphere total oxidant formation efficiency detection method, using the aerial oxygen of above-described embodiment 1 The property changed indicator detection device, comprising the following steps:

Controller control detection device enters atmosphere total oxidant formation efficiency detecting state；

Air sample is acquired through the first air flow circuit 10, air sample enters the first enriching apparatus 11, after enrichment, into urging Makeup set 12, the NOy in air sample is catalyzed be reduced to NO after, sample enter the first mixing chamber 60, ozone supply means warp Ozone flow path 40 supplies excessive ozone to the first mixing chamber 60, and ozone is reacted with the NO in gas, obtains NO₂, into titanium dioxide Nitrogen detector 90；Excessive NO gas enters the second mixing chamber 70 through nitric oxide flow path 50, with the O in air sample₃Reaction, it is raw At NO₂, into Nitrogen dioxide testing device 90；It is calculated through detection, obtains the volume fraction of NOy in atmosphere.

Air sample is acquired through the second air flow circuit 20, air sample enters the second enriching apparatus 21, and the is entered after enrichment One mixing chamber 60, ozone supply means 41 supply excessive ozone, ozone and air sample to the first mixing chamber 60 through ozone flow path 40 NO in product is converted into NO₂, Nitrogen dioxide testing device 90 is entered back into, is calculated through detection, obtains the volume fraction of NOx.

Air sample is acquired through third air flow circuit 30, air sample enters third enriching apparatus 31, and the is entered after enrichment Two mixing chambers；Excessive NO gas enters the second mixing chamber 70 through nitric oxide flow path 50, with the O in air sample₃Reaction generates NO₂；Under test gas enters Nitrogen dioxide testing device 90 after reaction, obtains NO₂Volume fraction, i.e., the volume fraction of Ox in atmosphere.

T moment and t are detected respectively₀The volume fraction of Ox, NOy, NOx in the atmosphere at moment, obtain three in the sampling time Volume fraction difference Ox (t-t₀), NOy (t-t₀) and NOx (t-t₀), repeated detection obtains multiple volume fraction difference Ox (t- t₀), NOy (t-t₀) and NOx (t-t₀), to multiple Ox (t-t₀) and [NOy (t-t₀)-NOx(t-t₀)] value progress linear regression, it obtains Linear regression curves are obtained, slope of a curve k is atmosphere total oxidant formation efficiency；As k > 8, NOx dominates smelly in atmosphere The generation of oxygen；As k < 8, VOCs (volatile organic matter) dominates the generation of Ozone in Atmosphere, temporal resolution minimum minute.

The working method of detection device is similar to Example 2, repeats no more.

In conjunction with above-described embodiment, the technical effect of the utility model is described as follows:

The oxidizing capacity indicator detection device of the utility model embodiment is integrated detection system, be can be realized Online or offline inspection uses controller to generate and send industry control instruction, to enriched air, channel switch or switching, flow The accurate control of controller, the acquisition of air sample and analysis etc. are uniformly controlled, and can be detected as needed different big Gas oxidisability indicator, and the source of Ozone in Atmosphere can be parsed.

The utility model embodiment oxidizing capacity indicator detection device, can assess different time sections atmosphere in situ Total oxidant generating rate simultaneously carries out ozone precursor sensitivity analysis, and the long-term simultaneous observation for obtaining Ox, NOx and NOy is effective Data are suitable for studying the prominent environmental problem such as compound atmosphere pollution, are also applied for implementing the comprehensive control of various air pollutants System and in-depth photochemical pollution control, also the measured data and parameter to obtain verifying model provide effective solution scheme.

The oxidizing capacity indicator detection device of the utility model embodiment, each flow path are real by automatically controlled Vavle switching Show by a Nitrogen dioxide testing device while having detected Ox, NOx and NOy volume fraction, system calibrating can be taken into account.Pass through control The combination of electrically-controlled valve different conditions can obtain atmosphere total oxidant formation efficiency and atmosphere total oxidant formation efficiency respectively, It can analyze in oxidizing capacity indicator and be converted between system calibrating, provide reliable guarantor for precise measurement and the quality of data Card.

The oxidizing capacity indicator detection device of the utility model embodiment, system accuracy is high, accurate and reliable, can Reduce the labor intensity and workload of Observation personnel.

More than, the embodiments of the present invention is illustrated.But the utility model is not limited to above-mentioned implementation Mode.Within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done, should be included in Within the protection scope of the utility model.

Claims

1. a kind of oxidizing capacity indicator detection device, which is characterized in that including the first air flow circuit, the second air stream Road, third air flow circuit, ozone flow path, nitric oxide flow path, the first mixing chamber, the second mixing chamber, detection flow path, nitrogen dioxide Detector and sampling apparatus；

The sampling apparatus can acquire air sample through first air flow circuit, the second air flow circuit and third air flow circuit Product；

First air flow circuit is configured with catalytic unit, and the catalytic unit is used to the NOy in air sample being catalyzed reduction For NO；The ozone flow path is configured with ozone supply means；First air flow circuit, the second air flow circuit and ozone flow path point It is not connected to the first mixing chamber；

The nitric oxide flow arrangement has nitric oxide feedway；The third air flow circuit and nitric oxide flow path difference It is connected to the second mixing chamber；

First mixing chamber and the second mixing chamber are through detecting fluid communication Nitrogen dioxide testing device.

2. oxidizing capacity indicator detection device as described in claim 1, which is characterized in that first air flow circuit Configured with the first enriching apparatus；Second air flow circuit is configured with the second enriching apparatus；The third air flow circuit is configured with Third enriching apparatus；First enriching apparatus, the second enriching apparatus and third enriching apparatus are respectively used to enriched air sample.

3. oxidizing capacity indicator detection device as claimed in claim 2, which is characterized in that the first enrichment dress Set, the second enriching apparatus and third enriching apparatus are transparent enrichment chamber, it is described enrichment chamber internal diameter be greater than respective air flow path Caliber.

4. oxidizing capacity indicator detection device as claimed in claim 3, which is characterized in that the enrichment chamber is by quartz Material is made.

5. oxidizing capacity indicator detection device as claimed in claim 3, which is characterized in that second enriching apparatus With dismountable first light-blocking member, the third enriching apparatus has dismountable second light-blocking member；Described second is empty Air-flow road is also connected to second mixing chamber.

6. oxidizing capacity indicator detection device as claimed in claim 5, which is characterized in that first air flow circuit Configured with the first electrically-controlled valve；The third air flow circuit is configured with third electrically-controlled valve；The ozone flow path is automatically controlled configured with the 4th Valve；The nitric oxide flow arrangement has the 5th electrically-controlled valve；The detection flow path is configured with the first threeway electrically-controlled valve, alternatively, institute Stating detection flow path includes the first detection flow path and the second detection flow path, and first mixing chamber is through the first detection flow path and titanium dioxide Nitrogen detector connection, second mixing chamber be connected tos through the second detection flow path with Nitrogen dioxide testing device, first detect flow path with Second detection flow path is each configured with electrically-controlled valve；Second air flow circuit is respectively communicated with the first mixing through the second threeway electrically-controlled valve Room and the second mixing chamber, alternatively, the second air flow circuit is connected to the first mixing chamber through the second electrically-controlled valve, through the 6th electrically-controlled valve connection the Two mixing chambers.

7. oxidizing capacity indicator detection device as claimed in claim 6, which is characterized in that the ozone flow path is also matched It is equipped with first flow controller；The nitric oxide flow path is also configured with second flow controller；The sampling apparatus is sampled Flow path is connected to Nitrogen dioxide testing device, is sent into the Nitrogen dioxide testing device for acquiring air sample, and by under test gas, The sampling flow path is configured with third flow controller.

8. oxidizing capacity indicator detection device as claimed in claim 7, which is characterized in that the detection device is also wrapped Controller is included, the controller is for controlling the opening and closing of sampling apparatus, the opening and closing of ozone supply means, nitric oxide feedway Opening and closing, catalytic unit opening and closing and catalytic temperature, the opening and closing of Nitrogen dioxide testing device, each electrically-controlled valve and each flow controller.