CN104330355A - Dual-optical-path oxynitride analyzer - Google Patents
Dual-optical-path oxynitride analyzer Download PDFInfo
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- CN104330355A CN104330355A CN201410661628.6A CN201410661628A CN104330355A CN 104330355 A CN104330355 A CN 104330355A CN 201410661628 A CN201410661628 A CN 201410661628A CN 104330355 A CN104330355 A CN 104330355A
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Abstract
The invention relates to the technical field of atmospheric monitoring and in particular relates to a dual-optical-path oxynitride analyzer. The analyzer comprises a reaction unit, an ozone generation unit, a gas inlet valve, a conversion unit, a measuring unit and a light chopping unit, wherein the reaction unit is provided with a first reaction tank and a second reaction tank, which are independent of each other; the light chopping unit comprises a chopper arranged between the reaction unit and the measuring unit. According to the dual-optical-path oxynitride analyzer, the reaction unit is provided with the two reaction tanks, gas switching is avoided, and therefore, the response time is greatly shortened, the interference of a pipeline to a gas to be tested is reduced, the measurement accuracy is improved and the service life of the analyzer is prolonged; as the light chopping unit of the dual-optical-path oxynitride analyzer is provided with the chopper which is switchable between two optical signals generated by the two reaction tanks, the arrangement of two measuring units is not required, and the interference and the fault rate due to two-path detection are avoided; meanwhile, the cost is reduced.
Description
Technical field
The present invention relates to atmospheric surveillance technical field, particularly relate to a kind of double light path analysis of nitrogen oxide device.
Background technology
Chemoluminescence method nitrogen-oxide analyzer, of the prior art, the 42i type nitrogen-oxide analyzer, of such as U.S. TE, and the T200 type nitrogen-oxide analyzer, of U.S. API are all the modes adopting monochromatic light road to react the detection of single photomultiplier, this mode NO and NO
2gas is switched by two two-position three way magnetic valve groups, alternately enters reaction tank, realizes NO, NO
2the measurement of concentration, this mode essence switches between two kinds of gases, and shortcoming is low-response, easily produces measuring error; Long-term work, gas circuit is easily blocked up, and produces gas path failure.Another kind of nitrogen-oxide analyzer, of the prior art, there are a kind of 8840 type nitrogen-oxide analyzer,s in such as U.S. Monitor company, and adopt the structure that light reaction pond reaction double photomultiplier detects, its shortcoming is that cost is high, failure rate is high, precision is low.
Given this, the defect overcome existing for the prior art is the art problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of double light path analysis of nitrogen oxide device, solves in prior art that to switch the low-response, the measuring error that cause large because of nitrogen monoxide, nitrogen dioxide two kinds of gases; And in prior art, adopt two photomultiplier two-way to detect the technical matters that the cost caused is high, failure rate is high, precision is low.
The present invention adopts following technical scheme:
A kind of double light path analysis of nitrogen oxide device, comprising:
Reacting part, described reacting part has the first reaction tank independent of each other and the second reaction tank;
The ozone generating unit be communicated with respectively with two reaction tanks;
Gas admittance valve, the second gas outlet that described gas admittance valve comprises air intake opening, the first gas outlet be communicated with the first reaction tank and is communicated with the second reaction tank;
Be located at the conversion portion between described first air intake opening and the first reaction tank, described conversion portion is used for nitrogen dioxide to be converted into nitrogen monoxide;
Determination part, described determination part detects the light sent through described reacting part, according to the intensity of the light that ozone and gas reaction to be measured produce, calculates the nitrous oxides concentration of described gas to be measured;
And
Cut light portion, described in cut light portion and comprise being located at and cut mating plate between described reacting part and described determination part.
In some embodiments, described determination part comprises:
For light signal being converted into the photomultiplier of electric signal;
The electronic signal processing module be connected with described photomultiplier;
The calculation control module be connected with electronic signal processing module.
In some embodiments, described in cut light portion and also comprise:
That cuts mating plate rotation described in drive cuts mating plate driving mechanism; And
For cutting the Rotation Controllers of mating plate position of rotation described in controlling.
In some embodiments, described in cut mating plate driving mechanism be stepper motor.
In some embodiments, the inlet end of described reacting part is provided with well heater, and the bright dipping end of described reacting part is provided with infrared fileter.
In some embodiments, described reaction tank is semicircle cavity, and described reacting part is also provided with Waste gas outlet.
In some embodiments, described reaction tank is also provided with air-path interface, metering hole and dust filter unit.
In some embodiments, described two reaction tanks are provided with oxides of nitrogen air intake opening and ozone inlet separately.
Compared with prior art, beneficial effect of the present invention is: double light path analysis of nitrogen oxide device of the present invention is owing to being provided with two reaction tanks at reacting part, without the need to carrying out gas switching, substantially increase the response time, decrease the interference of pipeline to gas to be measured, improve measuring accuracy, extend serviceable life; Double light path analysis of nitrogen oxide device of the present invention is owing to being provided with and cutting mating plate cutting light portion, switch back and forth between two light signals that can produce at two reaction tanks, without the need to arranging two determination parts, counteracting because two-way detects the interference and failure rate brought, reducing cost simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of double light path analysis of nitrogen oxide device that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In addition, if below in described each embodiment of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
Embodiments provide a kind of double light path analysis of nitrogen oxide device, comprising:
Reacting part, described reacting part has the first reaction tank independent of each other and the second reaction tank;
The ozone generating unit be communicated with respectively with two reaction tanks;
Gas admittance valve, the second gas outlet that described gas admittance valve comprises air intake opening, the first gas outlet be communicated with the first reaction tank and is communicated with the second reaction tank;
Be located at the conversion portion between described first air intake opening and the first reaction tank, described conversion portion is used for nitrogen dioxide to be converted into nitrogen monoxide;
Determination part, described determination part detects the light sent through described reacting part, according to the intensity of the light that ozone and gas reaction to be measured produce, calculates the nitrous oxides concentration of described gas to be measured;
And
Cut light portion, described in cut light portion and comprise being located at and cut mating plate between described reacting part and described determination part.
Particularly, said apparatus adopts photochemical method, and excessive nitrogen monoxide and ozone react and sends fluorescence, and the intensity of fluorescence is directly proportional to nitric oxide production concentration.Above-mentioned double light path analysis of nitrogen oxide device, owing to being provided with two reaction tanks at reacting part, without the need to carrying out gas switching, substantially increases the response time, decreases the interference of pipeline to gas to be measured, improves measuring accuracy, extend serviceable life; Above-mentioned double light path analysis of nitrogen oxide device is owing to being provided with and cutting mating plate cutting light portion, switch back and forth between two light signals that can produce at two reaction tanks, without the need to arranging two determination parts, counteracting because two-way detects the interference and failure rate brought, reducing cost simultaneously.
embodiment 1:
The embodiment of the present invention 1 provides a kind of double light path analysis of nitrogen oxide device, and refer to shown in Fig. 1, this device comprises: reacting part 1, ozone generating unit 16, conversion portion 17, gas admittance valve 18, determination part and cut light portion.
Wherein, reacting part has the first reaction tank 8 and the second reaction tank 9 independent of each other; The second gas outlet that gas admittance valve 18 comprises air intake opening, the first gas outlet be communicated with the first reaction tank 8 and is communicated with the second reaction tank 9; Conversion portion 17 is located between described first air intake opening and the first reaction tank 8, for nitrogen dioxide is converted into nitrogen monoxide.First reaction tank 8 and the second reaction tank 9 are semicircle cavity, and reacting part 1 is also provided with Waste gas outlet 6.
Wherein, the first reaction tank 8 is provided with the first oxides of nitrogen air intake opening 5, first ozone inlet 4, second reaction tank 9 and is provided with the second oxides of nitrogen air intake opening 2, second ozone inlet 3.
Determination part detects the light sent through reacting part 1, according to the intensity of the light that ozone and gas reaction to be measured produce, calculates the nitrous oxides concentration of described gas to be measured.Determination part comprises: for light signal being converted into the photomultiplier 11 of electric signal; The electronic signal processing module 14 be connected with photomultiplier 11; The calculation control module 15 be connected with electronic signal processing module 14, electric signal is carried out amplification and filtering process by electronic signal processing module 14, then is calculated by calculation control module 15, is converted into nitric oxide production concentration in gas to be measured.Cut light portion to comprise: cut mating plate 10, cut mating plate driving mechanism 12 and Rotation Controllers 13, cutting mating plate 10 is located between reacting part 1 and photomultiplier 11, cut mating plate driving mechanism 12 to drive and cut mating plate 11 and rotate, Rotation Controllers 13 controls the position of rotation cutting mating plate 10.Further, mating plate driving mechanism 12 is cut and Rotation Controllers 13 also can be controlled by calculation control module 15; Cut mating plate driving mechanism 12 for stepper motor; Calculation control module 15 is embedded computer.
Further, the inlet end of reacting part 1 is provided with well heater, and the bright dipping end of reacting part 1 is provided with infrared fileter 7, and infrared fileter 7 is for filtering the infrared light of wavelength about the 600-3000nm of reaction generation; Two reaction tanks are also provided with air-path interface, metering hole and dust filter unit.
The gas to be measured entered by gas admittance valve 18 is divided into two-way through the first gas outlet be communicated with the first reaction tank 8 and the second gas outlet be communicated with the second reaction tank 9, wherein, the first via gas to be measured entering the first reaction tank 8 have passed through the process of converter section 17, nitrogen dioxide is wherein transformed in order to nitrogen monoxide, and then enter in the first reaction tank 8 and react with ozone (enter whole be nitrogen monoxide), that survey is nitrogen dioxide and nitric oxide production potpourri NO
xconcentration; And enter the mixed gas for nitrogen monoxide and nitrogen dioxide of the second reaction tank 9, what survey is nitric oxide production concentration wherein; The concentration that nitric oxide production concentration is nitrogen dioxide is deducted by the concentration of mixed gas.Two the optical signals light reacting generation in first reaction tank 8 and the second reaction tank 9 switch, and detect by same determination part.Therefore, the double light path analysis of nitrogen oxide device of the present embodiment owing to being provided with two reaction tanks at reacting part, without the need to carrying out gas switching, substantially increase the response time, decrease the interference of pipeline to gas to be measured, improve measuring accuracy, extend serviceable life; The double light path analysis of nitrogen oxide device of the present embodiment is owing to being provided with and cutting mating plate cutting light portion, switch back and forth between two light signals that can produce at two reaction tanks, without the need to arranging two determination parts, counteracting because two-way detects the interference and failure rate brought, reducing cost simultaneously.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a double light path analysis of nitrogen oxide device, is characterized in that, this device comprises:
Reacting part, described reacting part has the first reaction tank independent of each other and the second reaction tank;
The ozone generating unit be communicated with respectively with two reaction tanks;
Gas admittance valve, the second gas outlet that described gas admittance valve comprises air intake opening, the first gas outlet be communicated with the first reaction tank and is communicated with the second reaction tank;
Be located at the conversion portion between described first air intake opening and the first reaction tank, described conversion portion is used for nitrogen dioxide to be converted into nitrogen monoxide;
Determination part, described determination part detects the light sent through described reacting part, according to the intensity of the light that ozone and gas reaction to be measured produce, calculates the nitrous oxides concentration of described gas to be measured;
And
Cut light portion, described in cut light portion and comprise being located at and cut mating plate between described reacting part and described determination part.
2. double light path analysis of nitrogen oxide device according to claim 1, it is characterized in that, described determination part comprises:
For light signal being converted into the photomultiplier of electric signal;
The electronic signal processing module be connected with described photomultiplier;
The calculation control module be connected with electronic signal processing module.
3. double light path analysis of nitrogen oxide device according to claim 1, is characterized in that, described in cut light portion and also comprise:
That cuts mating plate rotation described in drive cuts mating plate driving mechanism; And
For cutting the Rotation Controllers of mating plate position of rotation described in controlling.
4. double light path analysis of nitrogen oxide device according to claim 3, is characterized in that, described in cut mating plate driving mechanism be stepper motor.
5. double light path analysis of nitrogen oxide device according to claim 1, it is characterized in that, the inlet end of described reacting part is provided with well heater, and the bright dipping end of described reacting part is provided with infrared fileter.
6. double light path analysis of nitrogen oxide device according to claim 1, is characterized in that, described reaction tank is semicircle cavity, and described reacting part is also provided with Waste gas outlet.
7. double light path analysis of nitrogen oxide device according to claim 1, it is characterized in that, described reaction tank is also provided with air-path interface, metering hole and dust filter unit.
8. double light path analysis of nitrogen oxide device according to claim 1, is characterized in that, described two reaction tanks are provided with oxides of nitrogen air intake opening and ozone inlet separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410661628.6A CN104330355A (en) | 2014-11-19 | 2014-11-19 | Dual-optical-path oxynitride analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410661628.6A CN104330355A (en) | 2014-11-19 | 2014-11-19 | Dual-optical-path oxynitride analyzer |
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| CN104330355A true CN104330355A (en) | 2015-02-04 |
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| CN201410661628.6A Pending CN104330355A (en) | 2014-11-19 | 2014-11-19 | Dual-optical-path oxynitride analyzer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424631A (en) * | 2015-12-25 | 2016-03-23 | 中国科学院合肥物质科学研究院 | Ultrahigh sensitivity nitrogen oxide measurement system based on ultraviolet-visible waveband absorption spectrum |
| CN106290163A (en) * | 2016-07-21 | 2017-01-04 | 中国科学院化学研究所 | Dinitrogen pentoxide and concentration of nitric acid on-line monitoring system and monitoring method in a kind of air |
| CN110998313A (en) * | 2017-08-10 | 2020-04-10 | 西门子股份公司 | Gas analyzer for measuring nitrogen oxides and at least one other component in exhaust gas |
Citations (5)
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| GB1343858A (en) * | 1971-06-29 | 1974-01-16 | Ford Motor Co | Quantitative measurement of nitrogen dioxide in gaseous mixtures |
| US3882028A (en) * | 1974-05-17 | 1975-05-06 | Thermo Electron Corp | Multiple chamber chemiluminescent analyzer |
| CN2589971Y (en) * | 2002-12-25 | 2003-12-03 | 中国科学院安徽光学精密机械研究所 | Automatic monitor for air quality nitrogen oxide |
| CN1715882A (en) * | 2005-07-21 | 2006-01-04 | 华南师范大学 | Double room type nitrogen oxide chemiluminescence reactor |
| CN204346892U (en) * | 2014-11-19 | 2015-05-20 | 武汉怡特环保科技有限公司 | Double light path analysis of nitrogen oxide device |
-
2014
- 2014-11-19 CN CN201410661628.6A patent/CN104330355A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1343858A (en) * | 1971-06-29 | 1974-01-16 | Ford Motor Co | Quantitative measurement of nitrogen dioxide in gaseous mixtures |
| US3882028A (en) * | 1974-05-17 | 1975-05-06 | Thermo Electron Corp | Multiple chamber chemiluminescent analyzer |
| CN2589971Y (en) * | 2002-12-25 | 2003-12-03 | 中国科学院安徽光学精密机械研究所 | Automatic monitor for air quality nitrogen oxide |
| CN1715882A (en) * | 2005-07-21 | 2006-01-04 | 华南师范大学 | Double room type nitrogen oxide chemiluminescence reactor |
| CN204346892U (en) * | 2014-11-19 | 2015-05-20 | 武汉怡特环保科技有限公司 | Double light path analysis of nitrogen oxide device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424631A (en) * | 2015-12-25 | 2016-03-23 | 中国科学院合肥物质科学研究院 | Ultrahigh sensitivity nitrogen oxide measurement system based on ultraviolet-visible waveband absorption spectrum |
| CN105424631B (en) * | 2015-12-25 | 2018-12-07 | 中国科学院合肥物质科学研究院 | A kind of hypersensitivity nitrogen oxides measuring system based on UV, visible light wave band absorption spectrum |
| CN106290163A (en) * | 2016-07-21 | 2017-01-04 | 中国科学院化学研究所 | Dinitrogen pentoxide and concentration of nitric acid on-line monitoring system and monitoring method in a kind of air |
| CN110998313A (en) * | 2017-08-10 | 2020-04-10 | 西门子股份公司 | Gas analyzer for measuring nitrogen oxides and at least one other component in exhaust gas |
| CN110998313B (en) * | 2017-08-10 | 2022-02-25 | 西门子股份公司 | Gas analyzer for measuring nitrogen oxides and at least one other component in exhaust gas |
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Application publication date: 20150204 |