CN108827949A - A kind of nitrogen dioxide and ozone joint on-line measuring device and method - Google Patents

A kind of nitrogen dioxide and ozone joint on-line measuring device and method Download PDF

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Publication number
CN108827949A
CN108827949A CN201810920658.2A CN201810920658A CN108827949A CN 108827949 A CN108827949 A CN 108827949A CN 201810920658 A CN201810920658 A CN 201810920658A CN 108827949 A CN108827949 A CN 108827949A
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detector
ozone
nitrogen dioxide
gas
detection
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王竹青
付大友
袁东
谭文渊
杨冰
李佳祁
陈雨琴
廖琴瑶
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Sichuan University of Science and Engineering
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Sichuan University of Science and Engineering
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/76Chemiluminescence; Bioluminescence

Abstract

The invention discloses a kind of nitrogen dioxide and ozone joint on-line measuring device and method, device includes detection system, liquid channel system, air-channel system and master control system, and method then carries out the joint on-line checking of nitrogen dioxide and ozone using above-mentioned apparatus.The present invention utilizes the liquid phase chemiluminescence principle of high detection sensitivity, the joint on-line checking to two kinds of conventional pollution gases of nitrogen dioxide in atmosphere and ozone is realized simultaneously, convenient for eliminating interfering with each other between two kinds of gases, improve the accuracy of testing result, testing cost is reduced simultaneously, and structure is simple, small in size, light-weight, easy to carry, can facilitate using Emergent detection field on site.

Description

A kind of nitrogen dioxide and ozone joint on-line measuring device and method
Technical field
The present invention relates to the technical fields of gas detection, more particularly, are related to a kind of nitrogen dioxide and ozone is combined Line detector and method.
Background technique
Ozone is a kind of photochemical pollution gas, has strong oxidizing property, and the ozone of high concentration all has human body and plant Biggish injury.Nitrogen dioxide is also a kind of important Pollution Gas, while being the unique of troposphere Ozone in Atmosphere again Chemical generation source.Each state of our times all predominantly detects index using nitrogen dioxide and ozone as environmental monitoring.
Field is monitored in fixed-point type at present, gas phase chemiluminescence method generally used for the detection of nitrogen dioxide, and for The detection of ozone generally uses ultra-violet absorption spectrometry.Therefore, for the detection of two kinds of gas, detection method and detection device It is entirely different.It is higher that this results in equipment cost, and detection and maintenance cost are also relatively high.Meanwhile gas phase chemiluminescence method itself It is that nitrogen dioxide is converted to nitric oxide to detect, the interference of other nitrogenous gas can be introduced in reduction conversion process; And the sensitivity of ultra-violet absorption spectrometry itself is not high, vulnerable to interference.Although liquid phase chemoluminescence method has document report to be used for The measurement of nitrogen dioxide and ozone, but there is certain interference between each other when measurement, it is difficult to completely eliminate in independently measurement The influence of this part interference.
Summary of the invention
In order to overcome problems of the prior art, the present invention is intended to provide a kind of nitrogen dioxide and ozone joint are online Detection device and method, using identical detection system and detection method to the nitrogen dioxide and ozone gas progress reality in atmosphere When on-line synchronous detect.
An aspect of of the present present invention provides nitrogen dioxide and ozone joint on-line measuring device, and described device includes detection system System, liquid channel system, air-channel system and master control system;
The detection system includes the first detector for Nitrogen dioxide testing and the second detection for ozone detection Device, first detector and the second detector are equipped with inlet, liquid outlet, air inlet and air outlet;
The liquid channel system includes the first feed liquor unit being connected with the inlet of the first detector and the first detector The first connected dispensing unit of liquid outlet, the second feed liquor unit being connected with the inlet of the second detector and with the second detector Connected the second dispensing unit of liquid outlet;
The air-channel system includes the air inlet list being connected with the air inlet of the air inlet of the first detector and the second detector Member and the outlet cell being connected with the gas outlet of the gas outlet of the first detector and the second detector;
The master control system is electrically connected with detection system, liquid channel system and air-channel system.
One embodiment of nitrogen dioxide and ozone joint on-line measuring device according to the present invention, the first feed liquor unit Including the first reagent flow path and the first cleaning agent flow path being arranged in parallel, the first reagent flow path includes that the storage of the first reagent is held Device and the first peristaltic pump, the first cleaning agent flow path include cleaning agent storage container and the second peristaltic pump;First liquid storage Unit includes third peristaltic pump and waste liquid collection vessel.
One embodiment of nitrogen dioxide and ozone joint on-line measuring device according to the present invention, the second feed liquor unit Including the second reagent flow path and the second cleaning agent flow path being arranged in parallel, the second reagent flow path includes that the storage of the second reagent is held Device and the 4th peristaltic pump, the second cleaning agent flow path include cleaning agent storage container and the 5th peristaltic pump;Second liquid storage Unit includes the 6th peristaltic pump and waste liquid collection vessel.
According to the present invention nitrogen dioxide and ozone joint on-line measuring device one embodiment, first detector and Second detector shares cleaning agent storage container and waste liquid collection vessel;Peristaltic pump is superminiature ball-type peristaltic pump.
One embodiment of nitrogen dioxide and ozone joint on-line measuring device, the air admission unit include according to the present invention Air filter, the outlet cell include sequentially connected flowmeter, gas purification column and vacuum pump.
According to the present invention nitrogen dioxide and ozone joint on-line measuring device one embodiment, the flowmeter include with The second flowmeter gas outlet of first detector connected first flowmeter and be connected with the gas outlet of the second detector, it is described Flowmeter is laminar-flow type gas mass flow meter.
Nitrogen dioxide and ozone combine one embodiment of on-line measuring device according to the present invention, use in the first feed liquor unit In Nitrogen dioxide testing the first reagent be luminol, potassium hydroxide, sodium sulfite, Na2The mixing of EDTA and potassium iodide is molten Liquid, the second reagent in the second feed liquor unit for ozone detection are the mixed solution of luminol, potassium hydroxide and ethylene glycol, out The mixture of active carbon and potassium permanganate activated alumina particle is filled in gas purification column in gas unit.
Another aspect provides a kind of nitrogen dioxide and ozone to combine online test method, utilizes above-mentioned dioxy Change nitrogen and ozone joint on-line measuring device carries out the joint on-line checking of nitrogen dioxide and ozone.
One embodiment of nitrogen dioxide and ozone joint online test method according to the present invention, the method includes following Step:
A, it demarcates the nitrogen dioxide and ozone combines on-line measuring device, two kinds when acquisition nitrogen dioxide and ozone coexist Function model between the actual concentrations of gas and the detection signal of the first detector and the second detector;
B, control the first feed liquor unit and the first dispensing unit and the second feed liquor unit and the second dispensing unit respectively to First detector and the second detector are sent into the first detection reagent and the second detection reagent, while controlling air admission unit and outlet list Member is sent under test gas to the first detector and the second detector simultaneously;
C, the chemiluminescence signal of the first detector and the second detector is recorded by master control system, and is obtained according to step A To function model the actual concentrations of nitrogen dioxide and ozone under test gas are calculated in real time;
D, the first feed liquor unit and the first dispensing unit and the second feed liquor unit and the second dispensing unit are controlled after detection It is sent into cleaning reagent to the first detector and the second detector respectively, is completed spare after cleaning.
One embodiment of nitrogen dioxide and ozone joint online test method according to the present invention, demarcates institute in step It states nitrogen dioxide and ozone joint on-line measuring device specifically includes following sub-step:
Step 1:It is successively passed through the nitrogen dioxide gas of 50ppbv and 100ppbv into detection system, records first respectively Chemiluminescence signal detected by detector and the second detector lists nitrogen dioxide gas concentration and according to testing result Linear regression model (LRM) equation between chemiluminescence signal detected by one detector and the second detector, is denoted as I respectivelyNO2 =CNO2m1+a1And JNO2=CNO2m2+a2;Wherein, INO2Believe for the chemiluminescence of nitrogen dioxide gas detected by the first detector Number, JNO2For the chemiluminescence signal of nitrogen dioxide gas detected by the second detector, CNO2For the concentration of nitrogen dioxide gas;
Step 2:It is successively passed through the ozone gas of 50ppbv and 100ppbv into detection system, records the first detection respectively Chemiluminescence signal detected by device and the second detector lists concentration of ozone gas and the first detection according to testing result Linear regression model (LRM) equation between chemiluminescence signal detected by device and the second detector, is denoted as I respectivelyO3=CO3nn+ b2, JO3=CO3n1+b1;Wherein, IO3For the chemiluminescence signal of ozone gas detected by the first detector, JO3For the second detection The chemiluminescence signal of ozone gas detected by device, CO3For the concentration of ozone gas;
Step 3:According to the first detector and the second detector respectively to the linear regression model (LRM) side of nitrogen dioxide and ozone Journey derives the detection of the actual concentrations and the first detector and the second detector of two kinds of gas when nitrogen dioxide and ozone coexist Function model between signal is:
Wherein, I1For chemiluminescence signal detected by the first detector, JO3For change detected by the second detector Learn luminous signal.
Compared with prior art, nitrogen dioxide and ozone joint on-line measuring device provided by the invention and method utilize height The liquid phase chemiluminescence principle of detection sensitivity, while realizing to two kinds of conventional pollution gas of nitrogen dioxide in atmosphere and ozone The joint on-line checking of body improves the accuracy of testing result, reduces simultaneously convenient for eliminating interfering with each other between two kinds of gases Testing cost, and structure is simple, small in size, light-weight, easy to carry, can facilitate using Emergent detection field on site.
Detailed description of the invention
Fig. 1 shows the structure of nitrogen dioxide and ozone joint on-line measuring device according to an exemplary embodiment of the present invention Schematic diagram.
Description of symbols:
1- liquid channel system, the first agent storage container of 111-, the second agent storage container of 112-, the storage of 113- cleaning agent are held Device, 114- waste liquid collection vessel, the first peristaltic pump of 121-, the second peristaltic pump of 122-, 123- third peristaltic pump, 124- the 4th are wriggled Pump, the 5th peristaltic pump of 125-, the 6th peristaltic pump of 126-;
2- detection system, the first detector of 21-, the second detector of 22-;
3- air-channel system, 31- air filter, 32- first flowmeter, 33- second flowmeter, 34- gas purification column, 35- vacuum pump;
4- master control system.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics ?.
Below by first to nitrogen dioxide of the present invention and ozone joint on-line measuring device structure and principle carry out it is detailed Explanation.
Fig. 1 shows the structure of nitrogen dioxide and ozone joint on-line measuring device according to an exemplary embodiment of the present invention Schematic diagram.
As shown in Figure 1, an exemplary embodiment of the present invention, the nitrogen dioxide and ozone combine on-line measuring device Including detection system 2, liquid channel system 1, air-channel system 3 and master control system 4, detection system 2 is the device for carrying out detection reaction, Liquid channel system 1, which is realized, controls the fluid path of detection system 2, and air-channel system, which is realized, controls the gas circuit of detection system 2, master control system 4 realize joint on-line checking for controlling each component.
Specifically, detection system 2 includes for the first detector 21 of Nitrogen dioxide testing and for the of ozone detection Two detectors 22, the first detector 21 and the second detector 22 are equipped with inlet, liquid outlet, air inlet and air outlet.Wherein, First detector 21 and the second detector 22 are liquid phase chemiluminescence detector.
Liquid channel system 1 includes the first feed liquor unit being connected with the inlet of the first detector 21 and the first detector 21 Connected the first dispensing unit of liquid outlet, the second feed liquor unit for being connected with the inlet of the second detector 22 and examined with second Survey the second connected dispensing unit of the liquid outlet of device 22.
First feed liquor unit includes the first reagent flow path and the first cleaning agent flow path being arranged in parallel, the first reagent flow path packet The first agent storage container 111 and the first peristaltic pump 121 are included, the first cleaning agent flow path includes cleaning agent storage container 113 and Two peristaltic pumps 122;First liquid storage unit includes third peristaltic pump 123 and waste liquid collection vessel 114.Wherein, the first feed liquor unit In for Nitrogen dioxide testing the first reagent be luminol, potassium hydroxide, sodium sulfite, Na2The mixing of EDTA and potassium iodide Solution, sodium sulfite, Na2EDTA is used for the enhanced sensitivity of nitrogen dioxide, Na2EDTA, potassium iodide are used for the weakening of ozone interference.
Similarly, the second feed liquor unit includes the second reagent flow path and the second cleaning agent flow path being arranged in parallel, the second examination Agent flow path includes the second agent storage container 112 and the 4th peristaltic pump 124, and the second cleaning agent flow path includes cleaning agent storage container 113 and the 5th peristaltic pump 125;Second liquid storage unit includes the 6th peristaltic pump 126 and waste liquid collection vessel 114.Wherein, second The second reagent in feed liquor unit for ozone detection is the mixed solution of luminol, potassium hydroxide and ethylene glycol, and ethylene glycol is used In the weakening of the enhanced sensitivity and nitrogen dioxide of ozone.
Wherein, the first detector 21 and the second detector 22 share cleaning agent storage container 113 and waste liquid collection vessel 114, simplify apparatus structure, is easy to use maintenance.Above-mentioned peristaltic pump is superminiature ball-type peristaltic pump, and low energy consumption, small in size And abrasion hardly is generated to pump line, it can reduce maintenance cost and maintenance times.
Due to the reagent flow path and cleaning agent flow path of the first detector 21 and the second detector 22 be respectively adopted it is different compacted Dynamic pump driving, so that the flow velocity of flushing channel is larger to can effectively improve cleaning speed and cleaning effect.With before use electromagnetism Liquid of the valve in detection reagent compared with the structure switched between cleaning reagent, between liquid reagent storage device and detector Road pipeline is shorter, and the high energy dissipation device such as do not need solenoid valve, and pipeline number of transferring is few, improves the feed speed of liquid, thus Preheating time after reducing instrument booting, improve working efficiency.
And air-channel system 3 includes the air inlet being connected with the air inlet of the air inlet of the first detector 21 and the second detector 22 Unit and the outlet cell being connected with the gas outlet of the gas outlet of the first detector 21 and the second detector 22.
Specifically, air admission unit includes air filter, then the air inlet of the first detector 21 and the second detector 22 Air inlet is connected by air filter with outside air;Outlet cell includes sequentially connected flowmeter, gas purification column 34 With vacuum pump 35, the flowmeter include the first flowmeter 32 being connected with the gas outlet of the first detector 21 and with the second detector The connected second flowmeter 33 in 22 gas outlet, which is laminar-flow type gas mass flow meter, advantageously reduce power consumption, Mention high control precision and control speed.In addition, being filled with active carbon and potassium permanganate in gas purification column 34 in outlet cell The mixture of activated alumina particle, for the suction to the polluted gas in discharge gas in detection gas especially calibration process It receives, prevents secondary pollution.
Master control system 4 is then electrically connected with detection system 2, liquid channel system 1 and air-channel system 3, thus point for passing through each module It does not move and makees to realize the joint on-line checking of nitrogen dioxide and ozone.
According to the present invention, above-mentioned dioxy is then specifically utilized in nitrogen dioxide of the invention and ozone joint online test method Change nitrogen and ozone joint on-line measuring device carries out the joint on-line checking of nitrogen dioxide and ozone.
Specifically, detection method includes following multiple steps.
Step A:
It demarcates nitrogen dioxide and ozone and combines on-line measuring device, obtain nitrogen dioxide and two kinds of gas when ozone coexists Function model between actual concentrations and the detection signal of the first detector and the second detector.
By demarcating the acquisition with function model in advance, so as to the directly online inspection of joint in subsequent detection process Survey the concentration of two kinds of gas.
Wherein, it demarcates the nitrogen dioxide and ozone joint on-line measuring device specifically includes following sub-step:
Step 1:It is successively passed through the nitrogen dioxide gas of 50ppbv and 100ppbv into detection system, records first respectively Chemiluminescence signal detected by detector and the second detector lists nitrogen dioxide gas concentration and according to testing result Linear regression model (LRM) equation between chemiluminescence signal detected by one detector and the second detector, is denoted as I respectivelyNO2 =CNO2m1+a1And JNO2=CNO2m2+a2
Wherein, INO2For the chemiluminescence signal of nitrogen dioxide gas detected by the first detector, JNO2For the second detection The chemiluminescence signal of nitrogen dioxide gas detected by device, CNO2For the concentration of nitrogen dioxide gas;
Step 2:It is successively passed through the ozone gas of 50ppbv and 100ppbv into detection system, records the first detection respectively Chemiluminescence signal detected by device and the second detector lists concentration of ozone gas and the first detection according to testing result Linear regression model (LRM) equation between chemiluminescence signal detected by device and the second detector, is denoted as I respectivelyO3=CO3n2+ b2, JO3=CO3n1+b1
Wherein, IO3For the chemiluminescence signal of ozone gas detected by the first detector, JO3It is examined by the second detector Measure the chemiluminescence signal of ozone gas, CO3For the concentration of ozone gas;
Step 3:According to the first detector and the second detector respectively to the linear regression model (LRM) side of nitrogen dioxide and ozone Journey derives the detection of the actual concentrations and the first detector and the second detector of two kinds of gas when nitrogen dioxide and ozone coexist Function model between signal is:
Wherein, I1For chemiluminescence signal detected by the first detector, I2For chemistry detected by the second detector Luminous signal.
Thus, it is possible to include during atual detection having obtained the function models of calibrating parameters to be calculated two by this The actual concentrations of kind gas.
Step B:
The first feed liquor unit and the first dispensing unit and the second feed liquor unit and the second dispensing unit are controlled respectively to One detector and the second detector are sent into the first detection reagent and the second detection reagent, while controlling air admission unit and outlet cell Under test gas is sent into the first detector and the second detector simultaneously.
Step C:
The chemiluminescence signal of the first detector and the second detector is recorded by master control system, and is obtained according to step A Function model the actual concentrations of nitrogen dioxide and ozone under test gas are calculated in real time.
Step D:
The first feed liquor unit and the first dispensing unit and the second feed liquor unit and the second dispensing unit point are controlled after detection It is not sent into cleaning reagent to the first detector and the second detector, is completed spare after cleaning.
Preferably, feed speed when cleaning is greater than feed speed when detecting, to improve cleaning speed and cleaning effect; And feed speed is slightly less than liquid speed degree out, prevents detector internal liquid from building up.
The present invention is further explained in the light of specific embodiments.
Firstly, assembling forms the nitrogen dioxide and ozone joint on-line measuring device of structure as shown in Figure 1.
Secondly, the nitrogen dioxide and ozone standard gas of concentration needed for being generated in experiment indoor scene, wherein nitrogen dioxide Standard gas results from the nitrogen dioxide calibrating gas generator based on infiltration Manifold technology, and ozone standard gas is resulted from based on ultraviolet photolysis skill The ozone generator of art.Generated standard gas concentration has 2 kinds, 50ppbv and 100ppbv, and standard gas is passed through and assembles detection dress It sets, 1 minute detection data average value of record, wherein response point of first detector to nitrogen dioxide standard gas and ozone standard gas It is not:(2307,4601) and (23,42);Second detector is respectively to nitrogen dioxide standard gas and the response of ozone standard gas: (13,21) and (23,42).
Nitrogen dioxide is obtained according to above-mentioned scaling method and the actual concentrations of two kinds of gases and the first detection when ozone coexists Function model between device and the detection signal of the second detector is as follows:
INO2=CNO2m1+a1
JNO2=CNO2m2+a2
IO3=CO3n2+b2
JO3=CO3n1+b1
According to nominal data, above-mentioned formula is fitted, can be obtained:
INO2=CNO2*45.89+3
JNO2=CNO2*0.22+2
IO3=CO3*0.42-1
JO3=CO3*35.82-9
Gas to be detected is passed through detector, and the chemiluminescence signal that the one the second detectors are measured is respectively I1、I2, this When I1、I2It is the sum of nitrogen dioxide and ozone chemistry luminous signal detected by two detectors respectively.Therefore:
I1=INO2+IO3=CNO2m1+a1+CO3n2+b2
I2=JNO2+JO3=CNO2m2+a2+CO3n1+b1
According to calibration formula, can obtain:
I1=CNO2*45.89+CO3*0.42+2
I2=CNO2*0.22+CO3*35.82-7
Above-mentioned two formulas simultaneous constitutes system of linear equations, wherein m1、m2、n1、n2、a1、a2、b1、b2It is obtained linear to demarcate The parameter of regression model.Equation group is solved, can be obtained:
The joint on-line checking of nitrogen dioxide and ozone is carried out using above-mentioned apparatus later.
The specific steps are:
1) the first peristaltic pump, third peristaltic pump, the 4th peristaltic pump, the 6th wriggling pump work, the second peristaltic pump, the 5th are controlled Peristaltic pump stops, detection reagent enter under the drive of corresponding peristaltic pump in corresponding detector with the gas to be measured that enters detector Chemiluminescence reaction occurs for body, and waste reaction solution can be expelled to waste liquid collection vessel under the drive of peristaltic pump
2) control vacuum pump opens and make under test gas under the action of vacuum pump after air filter filters into pair Detector is answered to participate in reaction, the gas after reaction is discharged from the gas outlet of detector, and is discharged after gas purification column purification.
3) chemiluminescence signal of master control system record the first detector and the second detector, and according to above-mentioned function model Directly extrapolate the actual concentrations of nitrogen dioxide and ozone.Experiment indoor gas is detected, the first detector of gained and the The chemiluminescence signal of two detectors is:1443 and 598, it brings the parameter of the data and peg model into regression equation group, counts Calculation obtains indoor nitrogen dioxide and the concentration of ozone is respectively:31.2ppbv with 16.7ppbv.
Detection system is cleaned after having detected.Specifically, the second peristaltic pump, third peristaltic pump, the 5th compacted is controlled Dynamic pump, the 6th wriggling pump work, the first peristaltic pump, the 4th peristaltic pump stop, cleaning reagent under the drive of corresponding peristaltic pump into Enter cleaning of the corresponding detector completion to detector, cleaning waste liquid is discharged through liquid outlet.
In conclusion nitrogen dioxide provided by the invention and ozone joint on-line measuring device and method utilize high detection spirit The liquid phase chemiluminescence principle of sensitivity, while realizing the connection to two kinds of conventional pollution gas of nitrogen dioxide in atmosphere and ozone Close on-line checking, convenient for eliminate two kinds of gases between interfering with each other, improve the accuracy of testing result, at the same reduce detection at This, and structure is simple, small in size, light-weight, easy to carry, can facilitate using Emergent detection field on site.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed New feature or any new combination, and disclose any new method or process the step of or any new combination.

Claims (10)

1. a kind of nitrogen dioxide and ozone combine on-line measuring device, which is characterized in that described device includes detection system, fluid path System, air-channel system and master control system;
The detection system includes the first detector for Nitrogen dioxide testing and the second detector for ozone detection, institute It states the first detector and the second detector is equipped with inlet, liquid outlet, air inlet and air outlet;
The liquid channel system includes the first feed liquor unit being connected with the inlet of the first detector, the liquid out with the first detector Mouthful the first connected dispensing unit, the second feed liquor unit being connected with the inlet of the second detector and with the second detector out The second connected dispensing unit of liquid mouth;
The air-channel system include the air admission unit that is connected with the air inlet of the air inlet of the first detector and the second detector with And the outlet cell being connected with the gas outlet of the gas outlet of the first detector and the second detector;
The master control system is electrically connected with detection system, liquid channel system and air-channel system.
2. nitrogen dioxide and ozone combine on-line measuring device according to claim 1, which is characterized in that first feed liquor Unit includes the first reagent flow path and the first cleaning agent flow path being arranged in parallel, and the first reagent flow path is stored up including the first reagent Container and the first peristaltic pump are deposited, the first cleaning agent flow path includes cleaning agent storage container and the second peristaltic pump;Described first Liquid storage unit includes third peristaltic pump and waste liquid collection vessel.
3. nitrogen dioxide and ozone combine on-line measuring device according to claim 2, which is characterized in that second feed liquor Unit includes the second reagent flow path and the second cleaning agent flow path being arranged in parallel, and the second reagent flow path is stored up including the second reagent Container and the 4th peristaltic pump are deposited, the second cleaning agent flow path includes cleaning agent storage container and the 5th peristaltic pump;Described second Liquid storage unit includes the 6th peristaltic pump and waste liquid collection vessel.
4. nitrogen dioxide and ozone combine on-line measuring device according to claim 3, which is characterized in that first detection Device and the second detector share cleaning agent storage container and waste liquid collection vessel;Peristaltic pump is superminiature ball-type peristaltic pump.
5. nitrogen dioxide and ozone combine on-line measuring device according to claim 1, which is characterized in that the air admission unit Including air filter, the outlet cell includes sequentially connected flowmeter, gas purification column and vacuum pump.
6. nitrogen dioxide and ozone combine on-line measuring device according to claim 5, which is characterized in that the flowmeter packet The second flowmeter for including the first flowmeter being connected with the gas outlet of the first detector and being connected with the gas outlet of the second detector, The flowmeter is laminar-flow type gas mass flow meter.
7. nitrogen dioxide and ozone combine on-line measuring device according to claim 1, which is characterized in that the first feed liquor unit In for Nitrogen dioxide testing the first reagent be luminol, potassium hydroxide, sodium sulfite, Na2The mixing of EDTA and potassium iodide Solution, the second reagent in the second feed liquor unit for ozone detection are the mixed solution of luminol, potassium hydroxide and ethylene glycol, The mixture of active carbon and potassium permanganate activated alumina particle is filled in gas purification column in outlet cell.
8. a kind of nitrogen dioxide and ozone combine online test method, which is characterized in that utilize any one of any one of claims 1 to 77 The nitrogen dioxide and ozone joint on-line measuring device carry out the joint on-line checking of nitrogen dioxide and ozone.
9. nitrogen dioxide according to claim 8 and ozone combine online test method, which is characterized in that the method packet Include following steps:
A, it demarcates the nitrogen dioxide and ozone combines on-line measuring device, two kinds of gases when acquisition nitrogen dioxide and ozone coexist Actual concentrations and the first detector and the second detector detection signal between function model;
B, the first feed liquor unit and the first dispensing unit and the second feed liquor unit and the second dispensing unit are controlled respectively to first Detector and the second detector are sent into the first detection reagent and the second detection reagent, while controlling air admission unit and outlet cell is same When to the first detector and the second detector be sent under test gas;
C, the chemiluminescence signal of the first detector and the second detector is recorded by master control system, and obtained according to step A The actual concentrations of nitrogen dioxide and ozone under test gas are calculated in function model in real time;
D, the first feed liquor unit and the first dispensing unit and the second feed liquor unit and the second dispensing unit difference are controlled after detection It is sent into cleaning reagent to the first detector and the second detector, is completed spare after cleaning.
10. nitrogen dioxide according to claim 9 and ozone combine online test method, which is characterized in that in step It demarcates the nitrogen dioxide and ozone joint on-line measuring device specifically includes following sub-step:
Step 1:It is successively passed through the nitrogen dioxide gas of 50ppbv and 100ppbv into detection system, records the first detection respectively Chemiluminescence signal detected by device and the second detector lists nitrogen dioxide gas concentration and the first inspection according to testing result The linear regression model (LRM) equation between chemiluminescence signal detected by device and the second detector is surveyed, is denoted as I respectivelyNO2= CNO2m1+a1And JNO2=CNO2m2+a2;Wherein, INO2Believe for the chemiluminescence of nitrogen dioxide gas detected by the first detector Number, JNO2For the chemiluminescence signal of nitrogen dioxide gas detected by the second detector, CNO2For the concentration of nitrogen dioxide gas;
Step 2:The ozone gas of 50ppbv and 100ppbv are successively passed through into detection system, record respectively the first detector and Chemiluminescence signal detected by second detector, list according to testing result concentration of ozone gas and the first detector and Linear regression model (LRM) equation between chemiluminescence signal detected by second detector, is denoted as I respectivelyO3=CO3n2+b2, JO3 =CO3n1+b1;Wherein, IO3For the chemiluminescence signal of ozone gas detected by the first detector, JO3For the second detector institute Detect the chemiluminescence signal of ozone gas, CO3For the concentration of ozone gas;
Step 3:The linear regression model (LRM) equation of nitrogen dioxide and ozone is pushed away respectively according to the first detector and the second detector When export nitrogen dioxide and ozone coexist detected by the actual concentrations and the first detector and the second detector of two kinds of gas Function model between chemiluminescence signal is:
Wherein, I1For chemiluminescence signal detected by the first detector, I2For chemiluminescence detected by the second detector Signal.
CN201810920658.2A 2018-08-14 2018-08-14 A kind of nitrogen dioxide and ozone joint on-line measuring device and method Pending CN108827949A (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN110006876A (en) * 2019-04-24 2019-07-12 四川轻化工大学 A kind of device for testing carbon dioxide gas and detection method
CN111693514A (en) * 2020-05-07 2020-09-22 四川轻化工大学 Online detection device and method utilizing online liquid-gas conversion
CN112649420A (en) * 2019-10-12 2021-04-13 苏州淳雨净化科技有限公司 Special air comprehensive detection device for archives library
CN113189089A (en) * 2021-03-19 2021-07-30 四川轻化工大学 Ozone detection reagent and preparation device and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110006876A (en) * 2019-04-24 2019-07-12 四川轻化工大学 A kind of device for testing carbon dioxide gas and detection method
CN110006876B (en) * 2019-04-24 2021-07-27 四川轻化工大学 Carbon dioxide gas detection device and detection method
CN112649420A (en) * 2019-10-12 2021-04-13 苏州淳雨净化科技有限公司 Special air comprehensive detection device for archives library
CN111693514A (en) * 2020-05-07 2020-09-22 四川轻化工大学 Online detection device and method utilizing online liquid-gas conversion
CN113189089A (en) * 2021-03-19 2021-07-30 四川轻化工大学 Ozone detection reagent and preparation device and preparation method thereof

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