CN217059936U

CN217059936U - Chemiluminescence method nitrogen oxide analyzer

Info

Publication number: CN217059936U
Application number: CN202220713922.7U
Authority: CN
Inventors: 杨国龙; 李沿; 曹晓辉
Original assignee: Xi'an El Environmental Protection Technology Co ltd
Current assignee: Xi'an El Environmental Protection Technology Co ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-26
Anticipated expiration: 2032-03-29

Abstract

The application provides a chemiluminescence method nitrogen oxide analysis appearance, the outside one side of the reacting chamber of analysis appearance body is equipped with sample gas transport case, the inside of sample gas transport case is equipped with the nitrogen oxide converter, the outside of sample gas transport case is equipped with first air supply joint and second air supply joint, a side of sample gas transport case links to each other with the reacting chamber and is equipped with the gas-supply pipe that lets in the reacting chamber inside, first air supply joint is connected with the inlet end of nitrogen oxide converter and is connected with the gas-supply pipe behind the nitrogen oxide converter, the second air supply joint passes through the inside pipeline and the gas-supply pipe lug connection of sample gas transport case, the internal rotation of reacting chamber is connected with the mixing oar, the internal face fixed mounting of reacting chamber has the ozone conveying mechanism that can carry the required ozone of reaction and carry out ozone output air current direction change, the top fixed mounting of reacting chamber one side has the collection mechanism that is used for the gaseous collection after the reaction. This application can make the reaction in the reacting chamber more abundant and thorough, improves the degree of accuracy that the analysis appearance detected.

Description

Chemiluminescence method nitrogen oxide analyzer

Technical Field

The application relates to the technical field of nitrogen oxide analyzers, in particular to a chemiluminescence method nitrogen oxide analyzer.

Background

Nitrogen oxides are one of the main pollutants of atmospheric pollution and have serious harm to human health. Therefore, research works such as monitoring and treatment of nitrogen oxides are receiving close attention from all social circles in recent years. The nitrogen oxide analyzer is an instrument for detecting the content of ammonia nitrogen in the environment, and nitrogen oxides in the market are generally detected by a chemiluminescence method of the analyzer based on NO energy and O ₃ Can generate chemiluminescence reaction, the luminous intensity of which is in direct proportion to the concentration of NO, and the purpose of detecting the content of nitrogen oxide is realized, wherein, the reaction chamber of the nitrogen oxide analyzer is the core component in the whole system, and the reaction chamber is NO and O ₃ The site of the chemiluminescent reaction, therefore, NO and O in the reaction chamber ₃ Whether the chemiluminescence reaction can fully occur or not brings great influence on the detection result. However, in the use of the nitrogen oxide analyzer in the market, the ozone and NO in the reaction chamber are not sufficiently reacted, so that the detection accuracy of the nitrogen oxide analyzer is reduced.

SUMMERY OF THE UTILITY MODEL

The application provides a chemiluminescence method nitrogen oxide analyzer for solve the problem that the nitrogen oxide analyzer on the market provided in the background art is often insufficient in reaction with NO in a reaction chamber when in use, so that the detection accuracy of the nitrogen oxide analyzer is reduced.

The application provides a chemiluminescence method nitrogen oxide analyzer, including the analysis appearance body, the outside one side of the reacting chamber of analysis appearance body is provided with sample gas transport case, the inside of sample gas transport case is provided with the nitrogen oxide converter, the outside of sample gas transport case is provided with first air supply joint and second air supply joint, a side of sample gas transport case with the reacting chamber links to each other and is provided with lets in the inside gas-supply pipe of reacting chamber, first air supply joint with the inlet end of nitrogen oxide converter is connected and is connected with the gas-supply pipe behind the nitrogen oxide converter, second air supply joint pass through the inside pipeline of sample gas transport case with gas-supply pipe lug connection, the inside of reacting chamber rotates and is connected with the mixing oar, the internal face fixed mounting of reacting chamber has the ozone conveying mechanism that can carry the required ozone of reaction and carry out the change of ozone output air current direction, and a collecting mechanism for collecting gas after reaction is fixedly arranged at the top end of one side of the reaction chamber.

In a possible implementation mode, ozone conveying mechanism includes jet-propelled cover, locating rack, limiting plate and angle cylinder, the limiting plate with the internal face fixed connection of reacting chamber, the bottom of limiting plate is rotated and is installed the angle cylinder, the expansion end of angle cylinder is rotated and is connected with the locating rack, the inside fixed mounting of locating rack has jet-propelled cover, the fixed intercommunication in one side of admitting air of jet-propelled cover has the extension to the outside ozone conveying hose of reacting chamber, the other end of ozone conveying hose is connected with ozone generator.

In a possible implementation mode, ozone conveying mechanism fixed mounting in the reaction chamber inside with on the relative one side inner wall of sample gas delivery box, the mixing oar set up in middle part high position in the reaction chamber can jet-propelled cover rotates when carrying ozone, one side of giving vent to anger of jet-propelled cover is directional the mixing oar, jet-propelled cover is cylindric.

In a possible implementation manner, a photomultiplier is fixedly installed at the bottom end of the inner wall of the reaction chamber, and an optical filter is arranged above the outside of the photomultiplier.

In a possible realization, the inside of the reaction chamber is provided with a heating device, a refrigerating device and a temperature sensor.

In a possible implementation manner, the heating device is an electric heating tube, and the refrigerating device is a semiconductor refrigerating sheet with a refrigerating surface facing the inside of the reaction chamber.

In a possible implementation manner, a first flowmeter for detecting the flow rate of the sample gas conveyed in the reaction chamber is arranged on the gas conveying pipe, and a second flowmeter for detecting the flow rate of the ozone conveying is arranged on the ozone conveying hose.

In a possible implementation mode, collect the mechanism including collecting the box, retrieving the hose, retrieving the platform, exhaust duct, extraction hose and extraction pump, retrieve the platform level fixed set up in the top of reacting chamber one side, the both sides on retrieval platform top are fixed mounting respectively have the extraction pump with collect the box, the fixed intercommunication of air inlet of extraction pump has and extends to inside the reacting chamber the extraction hose, the fixed intercommunication of gas vent of extraction pump has and extends to collect the inside recovery hose of box, it keeps away from to collect the box the fixed intercommunication in one side of retrieving the hose has exhaust duct.

In a possible implementation manner, the surface of the collecting box is hinged with a sealing door, the inside of the collecting box is provided with a vertically arranged purification net, and an adsorbent for gas adsorption and purification is attached to the purification net.

Compared with the prior art, the beneficial effects of this application are:

according to the chemiluminescence method nitrogen oxide analyzer, the uniform mixing paddle and the ozone conveying mechanism are arranged in the reaction chamber of the analyzer body, so that on one hand, the ozone conveying mechanism can be used for conveying ozone required by reaction into the reaction chamber, and the direction of ozone output airflow is changed, so that the ozone airflow with constantly changed airflow direction is formed in the reaction chamber, and the ozone is improved from the aspect of ozone supply to promote full reaction with ozone; on the other hand, under ozone conveying mechanism's effect, can cooperate with the mixing oar that sets up in the reacting chamber when ozone output airflow direction changes, make the ozone air current that ozone conveying mechanism carried can drive the mixing oar and take place to rotate, and then the reaction gas ozone in the reacting chamber further fully contacts with nitric oxide under the stirring effect of mixing oar, make the reaction more abundant and thorough, improve the degree of accuracy that the analysis appearance detected, thereby overcome traditional nitrogen oxide analysis appearance because ozone and nitric oxide can not fully react in the reacting chamber and reduce nitrogen oxide analysis appearance detection accuracy's problem.

In addition, this application is through setting up the sample gas delivery box in the outside one side of reaction chamber, and set up the nitrogen oxide converter in the inside of sample gas delivery box, can utilize the convenient transport to the interior nitrogen oxide gas of examining of reaction chamber of sample gas delivery box, connect with the second air supply through setting up first air supply respectively for sample gas delivery box, the gas is examined in the selective access through first air supply joint, so that the nitrogen dioxide composition in the gas reduces into nitric oxide through the nitrogen oxide converter and carries again to the reaction with ozone in the reaction chamber, go back to connect to examine the gas through the second air supply and examine gas and directly will examine the gas transport to the reaction chamber and take place the reaction with ozone, in order to satisfy the different demands of nitrogen oxide detection time measuring. Simultaneously, this application has the collection mechanism that is used for reaction back gas collection at the top fixed mounting of reaction chamber one side, can come to collect reaction back reaction chamber inside gas through collecting the mechanism, avoids not handling and directly discharges in the middle of the external environment.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following descriptions are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic overall view of a chemiluminescent nitric oxide analyzer according to one embodiment of the present application;

FIG. 2 is a schematic structural diagram of a collection mechanism according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of an embodiment of a chemiluminescent NOx analyzer of the present disclosure;

fig. 4 is a schematic structural diagram of an ozone delivery mechanism according to an embodiment of the present application.

In the figure: 1. a reaction chamber; 2. a nitrogen oxide converter; 3. a sample gas delivery box; 31. a first gas supply connection; 32. a second gas supply connection; 4. a collection mechanism; 41. a collection box; 42. recovering the hose; 43. a recovery stage; 44. a sealing door; 45. an exhaust duct; 46. a purification net; 47. drawing a hose; 48. a suction pump; 5. an ozone delivery hose; 6. a photomultiplier tube; 7. mixing with a paddle; 8. an ozone delivery mechanism; 81. an air ejection hood; 82. a positioning frame; 83. a limiting plate; 84. an angle cylinder; 9. a gas delivery pipe; 10. an optical filter; 11. a heating device; 12. a refrigeration device; 13. a temperature sensor; 14. a first flow meter; 15. a second flow meter.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms referred to in the present application are explained first:

nitrogen oxide converter: means that the catalyst is loaded to enable NO to be converted at a certain temperature ₂ A means for converting the reduced NO;

an ozone generator: is used for preparing ozone gas (O) ₃ ) The device is widely applied to the fields of drinking water, sewage, industrial oxidation, food processing and fresh-keeping, medicine synthesis, space sterilization and the like;

a photomultiplier tube: is a vacuum electronic device which converts weak optical signals into electrical signals;

an optical filter: the optical device is used for selecting a required radiation wave band, and is widely applied to the industries of spectral analysis, biomedicine, machine vision, fluorescence microscopy, industrial automation and the like and the product field;

a temperature sensor: the semiconductor device converts non-electrical physical quantity into electrical quantity by utilizing the characteristic that the resistance value of the NTC changes along with the temperature, thereby being capable of carrying out accurate temperature measurement and automatic control;

semiconductor refrigeration piece: the thermoelectric refrigerating chip is a cooling device consisting of semiconductors;

an electric heating tube: the electric appliance element for converting electric energy into heat energy is composed of a metal tube spiral resistance wire, crystallized magnesium oxide powder and the like, has no pollution, is convenient to install and use and low in price compared with the traditional heating, and belongs to environment-friendly green production.

Referring to fig. 1 to 4, fig. 1 is a general schematic diagram of a chemiluminescence nitrogen oxide analyzer according to an embodiment of the present application; FIG. 2 is a schematic structural diagram of a collection mechanism according to an embodiment of the present disclosure; FIG. 3 is a schematic internal view of a chemiluminescent NOx analyzer provided in accordance with one embodiment of the present application; fig. 4 is a schematic structural diagram of an ozone conveying mechanism according to an embodiment of the present application. As shown in fig. 1-4, a chemiluminescence method nitrogen oxide analyzer in the embodiment of the present application includes an analyzer body, a sample gas conveying box 3 is disposed on one side of the outside of a reaction chamber 1 of the analyzer body, a nitrogen oxide converter 2 is disposed inside the sample gas conveying box 3, a first gas source connector 31 and a second gas source connector 32 are disposed outside the sample gas conveying box 3, one side of the sample gas conveying box 3 is connected to the reaction chamber 1 and is provided with a gas pipe 9 leading into the reaction chamber 1, the first gas source connector 31 is connected to the gas inlet end of the nitrogen oxide converter 2 and is connected to the gas pipe 9 via the nitrogen oxide converter 2, the second gas source connector 32 is directly connected to the gas pipe 9 via the internal pipeline of the sample gas conveying box 3, a mixing paddle 7 is rotatably connected to the inside of the reaction chamber 1, an ozone conveying mechanism 8 capable of conveying ozone required for reaction and changing the direction of ozone output gas flow is fixedly mounted on the inner wall surface of the reaction chamber 1, a collecting mechanism 4 for collecting gas after reaction is fixedly arranged at the top end of one side of the reaction chamber 1.

According to the chemiluminescence method nitrogen oxide analyzer, the uniform mixing paddle 7 and the ozone conveying mechanism 8 are arranged in the reaction chamber 1 of the analyzer body, so that on one hand, ozone required by reaction can be conveyed into the reaction chamber 1 by the ozone conveying mechanism 8, and the direction of ozone output airflow is changed, so that ozone airflow with constantly changed airflow direction is formed in the reaction chamber 1, and the ozone is improved from the aspect of ozone supply to promote full reaction with ozone; on the other hand, under ozone conveying mechanism 8's effect, can cooperate with mixing oar 7 that set up in the reaction chamber 1 when ozone output airflow direction changes, make the ozone air current that ozone conveying mechanism 8 carried can drive mixing oar 7 and take place to rotate, and then reaction gas ozone and nitric oxide in the reaction chamber 1 further fully contact under mixing oar 7's stirring effect, make the reaction more abundant and thorough, improve the degree of accuracy that the analysis appearance detected, thereby overcome traditional nitrogen oxide analysis appearance because ozone and nitric oxide can not fully react in the reaction chamber 1 and reduce nitrogen oxide analysis appearance detection accuracy's problem.

In addition, this application is through setting up sample gas delivery box 3 in 1 outside one side of reacting chamber, and set up nitrogen oxide converter 2 in the inside of sample gas delivery box 3, can utilize sample gas delivery box 3 convenient to examine the transport of nitrogen oxide gas to the reacting chamber 1 in, through setting up first air supply joint 31 and second air supply joint 32 respectively for sample gas delivery box 3, the gas is examined in the selective access of passing through first air supply joint 31, so that the nitrogen dioxide composition in the gas reduces into nitric oxide through nitrogen oxide converter 2 and carries again to reacting with ozone in the reacting chamber 1, still can insert through second air supply joint 32 and examine gas direct will examine the gas transport to the reacting chamber 1 in react with ozone, in order to satisfy the different demands of nitrogen oxide detection time measuring. In the practical application detection process, the second air source connector 32 can be used for connecting a standard air source for conveying standard air before detection so as to introduce the standard air into the reaction chamber 1 to avoid the influence of residual nitrogen oxide gas in the reaction chamber 1 on detection.

Simultaneously, this application has collection mechanism 4 that is used for gaseous collection after the reaction at the top fixed mounting of reaction chamber 1 one side, can come to collect reaction chamber 1 inside gas after through collecting mechanism 4, avoids in the middle of untreated and direct emission to external environment.

As an optional mode of this application embodiment, ozone conveying mechanism 8 includes jet hood 81, locating rack 82, limiting plate 83 and angle cylinder 84, the internal face fixed connection of limiting plate 83 and reaction chamber 1, the bottom of limiting plate 83 rotates and installs angle cylinder 84, the expansion end of angle cylinder 84 rotates and is connected with locating rack 82, the inside fixed mounting of locating rack 82 has jet hood 81, the fixed intercommunication in one side of admitting air of jet hood 81 has the ozone conveying hose 5 that extends to the reaction chamber 1 outside, the other end of ozone conveying hose 5 is connected with ozone generator. In practical application, can set up the valve that control ozone carried on ozone conveying hose 5, during the use, the staff can open the valve on the ozone conveying hose 5, ozone passes through ozone conveying hose 5 and carries to jet-propelled cover 81 in, the staff is with angle cylinder 84 circular telegram back, angle cylinder 84 can drive locating rack 82 and take place the angle deflection, thereby carry out the angle modulation to jet-propelled cover 81 that locating rack 82 installed, thereby make the jet-propelled angle of jet-propelled cover 81 spun ozone air current change, and simultaneously, spun ozone air current can promote mixing oar 7 and take place to rotate in the jet-propelled cover 81, make nitrogen oxide and ozone fully contact, make the reaction more abundant.

As an optional mode of this application embodiment, ozone conveying mechanism 8 fixed mounting is on the inside one side inner wall relative with sample gas delivery case 3 of reaction chamber 1 for can carry nitrogen oxide gas and ozone respectively through reaction chamber 1 both sides, compare to the inside homonymy transport nitrogen oxide gas of reaction chamber 1 and ozone, can make nitrogen oxide gas and ozone react more fully. Wherein, mixing oar 7 sets up the middle part high position in reaction chamber 1 and can rotate when jet hood 81 carries ozone, and when mixing oar 7 rotated for 1 inside gas constantly stirs and increases the contact probability of nitrogen oxide gas and ozone in reaction chamber, makes the reaction more quick and abundant. In this embodiment, the air outlet side of the air spraying cover 81 points to the mixing paddle 7, and then the mixing paddle 7 can be driven to rotate under the action of the ozone air flow. Optionally, the air injection cover 81 is cylindrical, so that the positioning frame 82 can be conveniently utilized to install the air injection cover 81, ozone can be conveyed into the reaction chamber 1 through the air injection cover 81 sufficiently and quickly, and the influence on the conveying efficiency of the ozone caused by the adoption of a too thin conveying pipe is avoided. In practical applications, the air injection cover 81 with a cone-cylinder structure can also be used for conveying ozone.

As an optional mode of the embodiment of the present application, a photomultiplier tube 6 is fixedly mounted at the bottom end of the inner wall of the reaction chamber 1, and a filter 10 is disposed above the outside of the photomultiplier tube 6. In the embodiment of the present application, in order to reduce the influence of stray light, an optical filter 10 is disposed above the outside of the photomultiplier tube 6, and is used for filtering the stray light in the reaction chamber 1 and preventing the stray light from influencing the detection result. The photomultiplier 6 has received the fluorescence after the light filter 10 filters the parasitic light and has obtained fluorescence intensity to can obtain the concentration of nitrogen oxide in the gas of examining, to the technical staff in the art, adopt photomultiplier 6 to carry out the light intensity detection and carry out the mode and the principle that nitrogen oxide concentration detected and belong to the publicly known prior art in this field, use photomultiplier 6 in this application in order to carry out the mode and the principle that nitrogen oxide concentration detected and with prior art, to this, this application here no longer gives details.

As an alternative to the embodiment of the present application, the reaction chamber 1 is provided with a heating device 11, a cooling device 12 and a temperature sensor 13 inside. This application can conveniently control the temperature of reaction chamber 1 inside through setting up heating device 11, refrigerating plant 12 and temperature sensor 13 for reaction chamber 1 to make the reaction in reaction chamber 1 go on in suitable temperature range, avoid inside high temperature or cross the condition emergence that influences the reaction excessively.

As an optional way of the embodiment of the present application, the heating device 11 is an electric heating tube, and the cooling device 12 is a semiconductor cooling plate with a cooling surface facing the inside of the reaction chamber 1. In this application embodiment, adopt electric heating pipe as heating device 11 to adopt the semiconductor refrigeration piece as refrigerating plant 12, can combine the temperature actual conditions that temperature sensor 13 detected, carry out rapid heating and cooling to reaction chamber 1 inside, with the temperature in accurate control reaction chamber 1, in order to do benefit to going on of reaction.

As an optional way of the embodiment of the present application, a first flow meter 14 for detecting the flow rate of the sample gas conveyed inside the reaction chamber 1 is arranged on the gas conveying pipe 9, and a second flow meter 15 for detecting the flow rate of the ozone conveyed is arranged on the ozone conveying hose 5. In the present application, by providing the first flow meter 14 and the second flow meter 15, the amount of sample gas transferred and the amount of ozone transferred can be counted easily.

As an optional manner of the embodiment of the present application, the collecting mechanism 4 includes a collecting box 41, a collecting hose 42, a collecting platform 43, an exhaust duct 45, an extraction hose 47 and an extraction pump 48, the collecting platform 43 is horizontally and fixedly disposed at the top end of one side of the reaction chamber 1, the extraction pump 48 and the collecting box 41 are respectively and fixedly mounted at two sides of the top end of the collecting platform 43, a purification net 46 is fixedly mounted inside the collecting box 41, the extraction hose 47 extending into the reaction chamber 1 is fixedly communicated with an air inlet of the extraction pump 48, the collecting hose 42 extending into the collecting box 41 is fixedly communicated with an air outlet of the extraction pump 48, and the exhaust duct 45 is fixedly communicated with one side of the collecting box 41 away from the recovery hose 42. When the device is used, a worker energizes the extraction pump 48, the extraction pump 48 is started, the extraction pump 48 extracts gas and redundant ozone gas after reaction in the reaction chamber 1 through the extraction hose 47, and the gas is conveyed into the collection box 41 through the recovery hose 42 and is prevented from being directly discharged into the external environment. In practice, valves may be installed on the extraction hose 47, the recovery hose 42 and the exhaust duct 45, respectively, to facilitate maintenance of the respective parts of the collecting mechanism 4.

As an optional manner of the embodiment of the present application, a sealing door 44 is hinged on the surface of the collecting box 41, a purifying net 46 is vertically arranged inside the collecting box 41, and an adsorbent for adsorbing and purifying gas is attached to the purifying net 46. In the embodiment of the present application, the purification net 46 in the collection box 41 is attached with an adsorbent, the adsorbent on the purification net 46 can adsorb harmful components in the collected gas, and the treated clean gas can be discharged to the outside through the exhaust duct 45. Simultaneously, this application through set up sealing door 44 for collecting box 41, during the use staff can open sealing door 44 to in change and purify net 46, or purify the adsorbent on the net 46 and supply, in order to continue to use. It should be noted that, the selection of the adsorbent may be selected by a worker according to actual conditions, and is not limited in this application. Of course, it is also possible for the user to discharge the gas collected in the collecting box 41 to other external gas processing devices through the exhaust duct 45 without using the purification net 46 in the collecting box 41.

It should be noted that, in practical applications, an operation panel may be further disposed outside the reaction chamber 1 to facilitate the control of the apparatus. For example, the control of the heating device 11, the cooling device 12, the suction pump 48, the angle cylinder 84, and the like can be performed by an operation panel. In addition, a display screen may be provided outside the reaction chamber 1 to check the detection result.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. The utility model provides a chemiluminescence method nitrogen oxide analysis appearance, includes the analysis appearance body, its characterized in that, the outside one side of reacting chamber (1) of analysis appearance body is provided with sample gas transport case (3), the inside of sample gas transport case (3) is provided with nitrogen oxide converter (2), the outside of sample gas transport case (3) is provided with first air supply joint (31) and second air supply joint (32), a side of sample gas transport case (3) with reacting chamber (1) link to each other and be provided with let in gas-supply pipe (9) inside reacting chamber (1), first air supply joint (31) with the inlet end of nitrogen oxide converter (2) is connected and is passed through behind nitrogen oxide converter (2) with gas-supply pipe (9) are connected, second air supply joint (32) through the inside pipeline of sample gas transport case (3) with gas-supply pipe (9) lug connection, the inside of reaction chamber (1) rotates and is connected with mixing oar (7), the internal face fixed mounting of reaction chamber (1) has can carry the required ozone of reaction and carries out ozone output airflow direction change's ozone conveying mechanism (8), the top fixed mounting of reaction chamber (1) one side has collection mechanism (4) that are used for reaction back gas collection.

2. The chemiluminescent nitrogen oxide analyzer according to claim 1, wherein the ozone conveying mechanism (8) comprises an air injection cover (81), a positioning frame (82), a limiting plate (83) and an angle cylinder (84), the limiting plate (83) is fixedly connected with the inner wall surface of the reaction chamber (1), the bottom end of the limiting plate (83) is rotatably installed on the angle cylinder (84), the movable end of the angle cylinder (84) is rotatably connected with the positioning frame (82), the air injection cover (81) is fixedly installed inside the positioning frame (82), the air inlet side of the air injection cover (81) is fixedly communicated with an ozone conveying hose (5) extending to the outside of the reaction chamber (1), and the other end of the ozone conveying hose (5) is connected with an ozone generator.

3. The chemiluminescent nitrogen oxide analyzer according to claim 2, wherein the ozone conveying mechanism (8) is fixedly mounted on the inner wall of the reaction chamber (1) on the side opposite to the sample gas conveying box (3), the mixing paddle (7) is arranged at the middle height position in the reaction chamber (1) and can rotate when the air spraying cover (81) conveys ozone, the air outlet side of the air spraying cover (81) points to the mixing paddle (7), and the air spraying cover (81) is cylindrical.

4. The chemiluminescent nitric oxide analyzer according to claim 2 or 3, wherein a photomultiplier (6) is fixedly mounted at the bottom end of the inner wall of the reaction chamber (1), and an optical filter (10) is arranged above the outside of the photomultiplier (6).

5. The chemiluminescent nitrogen oxide analyzer according to claim 4, characterized in that the reaction chamber (1) is internally provided with a heating device (11), a refrigerating device (12) and a temperature sensor (13).

6. The chemiluminescent nitric oxide analyzer according to claim 5, wherein the heating means (11) is an electric heating tube and the cooling means (12) is a semiconductor cooling plate with a cooling surface facing the inside of the reaction chamber (1).

7. The chemiluminescent nitric oxide analyzer according to claim 4, wherein the gas pipe (9) is provided with a first flow meter (14) for detecting the flow of the sample gas transported in the reaction chamber (1), and the ozone transporting hose (5) is provided with a second flow meter (15) for detecting the ozone transporting flow.

8. The chemiluminescent nitrogen oxide analyzer according to any one of claims 5 to 7, characterized in that the collecting mechanism (4) comprises a collecting box (41), a recovery hose (42), a recovery platform (43), an exhaust pipeline (45), an extraction hose (47) and an extraction pump (48), the recovery platform (43) is horizontally and fixedly arranged at the top end of one side of the reaction chamber (1), the two sides of the top end of the recovery platform (43) are respectively fixedly provided with the extraction pump (48) and the collection box (41), an air inlet of the extraction pump (48) is fixedly communicated with the extraction hose (47) extending to the interior of the reaction chamber (1), a recovery hose (42) extending to the interior of the collection box (41) is fixedly communicated with an exhaust port of the extraction pump (48), the side, far away from the recovery hose (42), of the collection box (41) is fixedly communicated with the exhaust pipeline (45).

9. The chemiluminescent nitrogen oxide analyzer according to claim 8, wherein the surface of the collecting box (41) is hinged with a sealing door (44), the collecting box (41) is internally provided with a vertically arranged purifying net (46), and the purifying net (46) is attached with an adsorbent for gas adsorption purification.