CN105424635A - Ultraviolet spectrum flue gas analyzer - Google Patents
Ultraviolet spectrum flue gas analyzer Download PDFInfo
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- CN105424635A CN105424635A CN201610018480.3A CN201610018480A CN105424635A CN 105424635 A CN105424635 A CN 105424635A CN 201610018480 A CN201610018480 A CN 201610018480A CN 105424635 A CN105424635 A CN 105424635A
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- light source
- flue gas
- gas
- ultraviolet spectrum
- sensor
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000003546 flue gas Substances 0.000 title claims abstract description 18
- 238000002211 ultraviolet spectrum Methods 0.000 title claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 72
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- 239000001301 oxygen Substances 0.000 claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 11
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical group [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 3
- 229910052805 deuterium Inorganic materials 0.000 claims description 3
- 238000000862 absorption spectrum Methods 0.000 abstract description 8
- 239000013307 optical fiber Substances 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 3
- 210000000695 crystalline len Anatomy 0.000 description 20
- 238000010521 absorption reaction Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 11
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 238000004611 spectroscopical analysis Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001658 differential optical absorption spectrophotometry Methods 0.000 description 2
- 238000002795 fluorescence method Methods 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/061—Sources
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/08—Optical fibres; light guides
- G01N2201/088—Using a sensor fibre
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to an ultraviolet spectrum flue gas analyzer, belongs to the technical field of flue gas detection, and provides an ultraviolet spectrum flue gas analyzer, wherein the parts, of which the light intensity slowly changes along with the wave length, of absorption spectra are removed, only the parts, of which the light intensity quickly changes along with the wave length, of the absorption spectra are left, inversion is performed on the gas concentration through the quick changing parts, and therefore measured value fluctuating and drifting caused by the factors such as light source temperature drifting or attenuating, dust interference and other gas interference can be avoided. According to the technical scheme, the ultraviolet spectrum flue gas analyzer comprises a closed gas chamber used for storing gas and a light source used for emitting parallel light into the gas chamber, one end of the closed gas chamber is provided with an optical fiber sensor used for receiving the parallel light, the optical fiber sensor is connected with a spectrograph, the closed gas chamber is provided with a temperature sensor and an oxygen sensor and further provided with an air inlet pipe and a sample gas inlet pipe, and the temperature sensor, the oxygen sensor, the spectrograph, and the light source are all connected with a main control unit. The ultraviolet spectrum flue gas analyzer is widely applied to flue gas detection.
Description
Technical field
The present invention relates to a kind of ultraviolet spectrum flue gas analyzer, belong to flue gas inspection technical field.
Background technology
At present, gas analyzer existing on the market mainly utilizes ultraviolet fluorescence method and tunable laser method, ultraviolet fluorescence method can be used for measuring sulphuric dioxide, its principle is that the ultraviolet lighting near 190 ~ 230nm is when being mapped to tested gas, sulfur dioxide molecule absorbs the energy of ultraviolet light, and molecule was subject to exciting and sends fluorescence when high level returns ground state.N2 in air, O2 does not cause substantially " fluorescent quenching effect ", and the SO2 of excited state returns ground state mainly through fluorescence process, utilizes photomultiplier to receive the fluorescence sent out, Ultraluminescence is sent out the monitoring sensitivity of SO2 very high, and fluorescent intensity size can reflect the concentration of sulphuric dioxide.The method can monitor the low concentration SO 2 of the ppb order of magnitude, and dynamic range and the linearity are very well simultaneously, are therefore used for quality of air environment monitoring.When being applied in flue gas monitoring, need to be equipped with dilution method sampling thief, system is very complicated.Tunable laser (TunableLaser), refers to the laser instrument that can continuously change laser output wavelength within the specific limits.This laser instrument of many uses, can be used for spectroscopy, photochemistry, medical science, biology, integrated optics, pollution monitoring, semiconductor material processing, information processing and communicates.Due to laser wavelength wide coverage, intensity is large, and spectral line is narrow, may be used for the detection of multiple gases.Generally there are two kinds of working methods: a kind of is the back scattering utilizing tested gas, obtain dusty gas distribution spatially, based on differential absorption lidar technology.Another kind utilizes the mean concentration on reverberator acquisition light path direction, and transmitted light and utilizing emitted light meet langbobier law.The advantage of the method almost can measure all gas, responds fast precision high.Shortcoming is that the cost of the tunable laser of middle infrared is too high, and gas with various detects need be equipped with Different Light, and the absorption line strengths that the laser instrument of near-infrared region produces is lower, is unfavorable for measuring.
Summary of the invention
For solving the technical matters that prior art exists, the invention provides a kind of part rejected light intensity wavelength and slowly change in absorption spectrum, and only stay with the fast-changing part of wavelength, then go the concentration of inverting gas with fast changing portion, thus can avoid because the measured value that the factor such as the drift of light source temperature or decay, dust interference, other gas interference causes fluctuates and the ultraviolet spectrum flue gas analyzer of drift.
For achieving the above object, the technical solution adopted in the present invention is ultraviolet spectrum flue gas analyzer, comprise sealed gas chamber for depositing gas and for the light source to emitting parallel light in air chamber, one end of described sealed gas chamber is provided with the Fibre Optical Sensor for receiving directional light, described Fibre Optical Sensor is connected with spectrometer, described sealed gas chamber is provided with temperature sensor and oxygen sensor, sealed gas chamber is also provided with air intake duct and sample gas draft tube, and described temperature sensor, oxygen sensor, spectrometer are all connected with main control unit with light source.
Preferably, described sealed gas chamber is primarily of cylindrical shell, divergent lens and collector lens are formed, the two ends of described cylindrical shell are respectively arranged with divergent lens and collector lens, light source is arranged on the outside of divergent lens, the outer setting of collector lens has end cap, described Fibre Optical Sensor is arranged on end cap, described cylindrical shell is provided with draft tube and escape pipe, described draft tube is provided with solenoid electric valve, described air intake duct is connected with solenoid electric valve respectively with sample gas draft tube, described air intake duct is provided with sampling pump, described escape pipe is provided with oxygen sensor.
Preferably, described main control unit is provided with man-machine interface and interface board, described temperature sensor, oxygen sensor are all connected with interface board with light source.
Preferably, described light source is deuterium lamp light source.
Compared with prior art, the present invention has following technique effect: present invention utilizes ultraviolet DOAS difference absorption spectrum technology, the part that light intensity wavelength slowly changes is rejected exactly in absorption spectrum, and only stay with the fast-changing part of wavelength, then go the concentration of inverting gas with fast changing portion, thus can avoid because the measured value that the factor such as the drift of light source temperature or decay, dust interference, other gas interference causes fluctuates and drift.The concentration of multiple gases can be measured simultaneously; Eliminate the influence factors such as flue dust, moisture, light source change, ensure that the Stability and veracity of measurement.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
In order to make technical matters to be solved by this invention, technical scheme and beneficial effect 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.
As shown in Figure 1, ultraviolet spectrum flue gas analyzer, comprise sealed gas chamber 1 for depositing gas and for the light source 2 to emitting parallel light in air chamber, one end of sealed gas chamber 1 is provided with the Fibre Optical Sensor 3 for receiving directional light, Fibre Optical Sensor 3 is connected with spectrometer 4, sealed gas chamber 1 is provided with temperature sensor 5 and oxygen sensor 6, sealed gas chamber 1 is also provided with air intake duct 7 and sample gas draft tube 8, and temperature sensor 5, oxygen sensor 6, spectrometer 4 are all connected with main control unit 9 with light source 2.
Wherein, sealed gas chamber 1 is primarily of cylindrical shell 10, divergent lens 11 and collector lens 12 are formed, the two ends of cylindrical shell 10 are respectively arranged with divergent lens 11 and collector lens 12, light source 2 is arranged on the outside of divergent lens 11, the outer setting of collector lens 12 has end cap 13, end cap 13 to be fixed on cylindrical shell and to seal, Fibre Optical Sensor 3 is arranged on end cap 13, cylindrical shell 10 is provided with draft tube 14 and escape pipe 15, draft tube 15 is provided with solenoid electric valve 16, air intake duct 7 is connected with solenoid electric valve 16 respectively with sample gas draft tube 8, air intake duct 7 is provided with sampling pump 17, escape pipe 15 is provided with oxygen sensor 6.Main control unit 9 is provided with man-machine interface 18 and interface board 19, temperature sensor 5, oxygen sensor 6 are all connected with interface board 19 with light source 2.
In the present invention, gas sampling unit primary responsibility gathers sample gas and air, then air chamber is delivered to for other part Measurement and analysis, gas sampling unit is primarily of sampling pump, solenoid valve, associated pipe composition, sampling pump is responsible for gathering extraneous air, the input switching air and sample gas is responsible for by solenoid valve, their duty is coordinated to determine by main control unit, the gas samping pump choosing small size, ultra-low noise, wide temperature range, life-span long, good stability of sampling pump, drops to ultimate attainment by sampling pump to the error that gas concentration inverting brings.Same solenoid valve also adopts quality product, effectively reduces electromagnetic interference (EMI).
The Lights section is by emitting ultraviolet light to air chamber, and for the absorption spectra measurement of gas provides condition precedent, the performance of light source directly determines analysis precision, stability and life-span.One's duty analyzer has selected a high stability, long-life deuterium lamp light source, its operation wavelength can cover multiple gases absorption spectra, spectrum is mild, optical noise is little, the energy of ultraviolet portion is higher, meet very much the absorption characteristic at ultraviolet band analyzing multiple gases, substantially increase analyser measuring accuracy and stability simultaneously.
Spectral measurement part is made up of air chamber, spectrometer, Fibre Optical Sensor, lens etc., it is for measuring, processing spectroscopic data, and realize the communication with main control unit, the air chamber in analyser is the parts of independent research simultaneously, its gloss, to pollutant absorption little, store gas effectiveness good; Spectrometer mainly gathers spectral signal and is converted to electric signal, and be responsible for optical information to be sent to processing unit in real time, the quality of light signal conversion electric signal directly affects the measuring accuracy of gas, in conjunction with the gas absorption design feature of well-behaved analyzer, the present invention have selected the spectrometer of high resolving power, high precision, high s/n ratio, its volume is little simultaneously, and it is convenient that the installation for miscellaneous part brings.Fibre Optical Sensor is responsible for the conduction of light signal, for meeting the severe of environment for use, the loss of signal is little, selects the silica fibre adopting outside special processing, in casing, adopt custom-designed support to fix, reduce its loss that signal or optical fiber itself are brought of moving.Lens are divided into collector lens and divergent lens, and the scattered light that light source sends by divergent lens is converted to directional light, then enters air chamber, and collector lens passes to optical fiber after the directional light of air chamber is converted to focused light.K9 crystalline lens selected by lens, and its good transmittance, can not cause large impact to light transmission.
Main control unit is the core cell of analyser, it plays the core cell that number allows all parts in analyser work in order, it is roughly divided into data acquisition, data processing, communication, inner loop, and data acquisition comprises the spectrum electric signal, collecting temperature signal, the collection lambda sensor electric signal that gather spectrometer; Data processing is the compensation of the process spectral signal of spectrometer collection, oxygen sensor signal, temperature signal, data, mainly the spectral signal received is finally inversed by gas concentration through specific software processing mode; Communication is divided into PERCOM peripheral communication and intercommunication, is internally responsible for the data in real-time update display screen and state, externally the information after process is passed out in real time; Inner loop comprises the break-make of Controlling solenoid valve, the switch of sampling pump, the state recognition etc. of button.
Measuring principle:
In the present invention, the method for measure gas concentrations is Differential UV spectroscopy absorption process (DOSA technology), it is at a kind of spectroscopic analysis methods tested gas concentration being compared to accurate quantitative analysis, it utilizes tested gas to have obvious Difference Absorption structure at selected wave band, thus accurate discrimination gas with various and the tested gas concentration of monitoring.
The ultimate principle of DOSA technology utilizes the narrow-band absorption characteristic of gas to be measured to differentiate molecule, and according to the concentration of narrow-band absorption intensity inverting gas.Regard the absorption cross section of gas as two-part superposition, its part slowly changed with wavelength for the moment, form the wideband structural of spectrum, it two is with wavelength fast changing portion, form the arrowband structure of spectrum, as shown in the formula: σ i (λ)=Pi (λ)+Ri (λ).
The wherein absorption cross section of σ i (λ) gas, Pi (λ) is for absorption cross section is with the slow changing unit of wavelength, Ri (λ) is for absorption cross section is with wavelength sharply conversion fraction, the principle of DOAS removes the slow changing unit of light intensity wavelength exactly in absorption spectrum, only stay with the fast-changing part of wavelength, then utilize fast changing portion to go inverting gas concentration.
The Computing Principle of absorption cross section is then Beer-Lambert law: this law formula is as follows: Ii (λ)=I0 (λ) exp{-L* σ i (λ) * X}.
Wherein I0 (λ) represents the incident intensity that wavelength goes out at λ, and Ii (λ) represents that i-th kind of gas is through the concentration light intensity that to be X and light path be after the gas to be measured of L, and σ i (λ) is i-th kind of gas absorption cross section.
I0 (λ) can be tested by laboratory and obtain, Ii (λ) can be tested by spectrometer and obtain, light path L is fixed value, as can be seen from above-mentioned two formula, as long as the slow change part Pi (λ) of absorption cross section can be eliminated, the fast relation becoming the value of part Ri (λ) and the concentration of gas is utilized to be finally inversed by gas concentration value, Ri (λ).
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 wrap within the scope of the present invention.
Claims (4)
1. ultraviolet spectrum flue gas analyzer, it is characterized in that: comprise sealed gas chamber for depositing gas and for the light source to emitting parallel light in air chamber, one end of described sealed gas chamber is provided with the Fibre Optical Sensor for receiving directional light, described Fibre Optical Sensor is connected with spectrometer, described sealed gas chamber is provided with temperature sensor and oxygen sensor, sealed gas chamber is also provided with air intake duct and sample gas draft tube, and described temperature sensor, oxygen sensor, spectrometer are all connected with main control unit with light source.
2. ultraviolet spectrum flue gas analyzer according to claim 1, it is characterized in that: described sealed gas chamber is primarily of cylindrical shell, divergent lens and collector lens are formed, the two ends of described cylindrical shell are respectively arranged with divergent lens and collector lens, light source is arranged on the outside of divergent lens, the outer setting of collector lens has end cap, described Fibre Optical Sensor is arranged on end cap, described cylindrical shell is provided with draft tube and escape pipe, described draft tube is provided with solenoid electric valve, described air intake duct is connected with solenoid electric valve respectively with sample gas draft tube, described air intake duct is provided with sampling pump, described escape pipe is provided with oxygen sensor.
3. ultraviolet spectrum flue gas analyzer according to claim 1, it is characterized in that: described main control unit is provided with man-machine interface and interface board, described temperature sensor, oxygen sensor are all connected with interface board with light source.
4. ultraviolet spectrum flue gas analyzer according to claim 1, is characterized in that: described light source is deuterium lamp light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610018480.3A CN105424635A (en) | 2016-01-12 | 2016-01-12 | Ultraviolet spectrum flue gas analyzer |
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| CN201610018480.3A CN105424635A (en) | 2016-01-12 | 2016-01-12 | Ultraviolet spectrum flue gas analyzer |
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| CN201610018480.3A Pending CN105424635A (en) | 2016-01-12 | 2016-01-12 | Ultraviolet spectrum flue gas analyzer |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483087A (en) * | 2016-12-13 | 2017-03-08 | 云南电网有限责任公司电力科学研究院 | A kind of sulfur dioxide detection method and system |
| CN107064039A (en) * | 2017-04-19 | 2017-08-18 | 中国电子科技集团公司第四十九研究所 | A kind of detection method of ozone monitoring sensor and its ozone concentration based on phase lock amplifying technology |
| CN107328727A (en) * | 2017-07-27 | 2017-11-07 | 天津国阳科技发展有限公司 | Flue gas analysis device and method based on ultraviolet difference technology |
| CN108072610A (en) * | 2018-01-17 | 2018-05-25 | 南开大学 | Detection device in a kind of smoke pipe |
| CN108760640A (en) * | 2018-08-16 | 2018-11-06 | 安徽安诚泽宇环境科技有限公司 | A kind of moving source exhaust emission gas rapid detection system and detection method |
| CN108956517A (en) * | 2018-09-11 | 2018-12-07 | 哈尔滨工业大学 | A kind of real-time online continuously monitors the device and its application method of sulfate concentration |
| CN108956513A (en) * | 2018-08-03 | 2018-12-07 | 西安工业大学 | Portable ultraviolet spectrum flue gas analyzer and analysis method |
| CN109187343A (en) * | 2018-08-31 | 2019-01-11 | 中煤科工集团重庆研究院有限公司 | The laser methane of gas drainage pipeline is popped one's head in |
| CN109632681A (en) * | 2018-12-29 | 2019-04-16 | 青岛海纳光电环保有限公司 | Surrounding air sulfur dioxide detection device and detection method |
| CN111912806A (en) * | 2020-06-18 | 2020-11-10 | 深圳市安车检测股份有限公司 | NOx gas concentration detection platform |
| CN113406023A (en) * | 2021-05-24 | 2021-09-17 | 哈尔滨工程大学 | Natural gas combustible gas component concentration on-line measuring device |
| CN114062324A (en) * | 2021-11-10 | 2022-02-18 | 大连海事大学 | Device and method for preventing optical detection lens from being stained in smoke component detection |
| CN116242795A (en) * | 2023-05-12 | 2023-06-09 | 山东益来环保科技有限公司 | Ultraviolet smoke analyzer and application method thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483087A (en) * | 2016-12-13 | 2017-03-08 | 云南电网有限责任公司电力科学研究院 | A kind of sulfur dioxide detection method and system |
| CN107064039A (en) * | 2017-04-19 | 2017-08-18 | 中国电子科技集团公司第四十九研究所 | A kind of detection method of ozone monitoring sensor and its ozone concentration based on phase lock amplifying technology |
| CN107328727B (en) * | 2017-07-27 | 2019-10-22 | 天津国阳科技发展有限公司 | Flue gas analysis device and method based on ultraviolet difference technology |
| CN107328727A (en) * | 2017-07-27 | 2017-11-07 | 天津国阳科技发展有限公司 | Flue gas analysis device and method based on ultraviolet difference technology |
| CN108072610A (en) * | 2018-01-17 | 2018-05-25 | 南开大学 | Detection device in a kind of smoke pipe |
| CN108956513A (en) * | 2018-08-03 | 2018-12-07 | 西安工业大学 | Portable ultraviolet spectrum flue gas analyzer and analysis method |
| CN108760640A (en) * | 2018-08-16 | 2018-11-06 | 安徽安诚泽宇环境科技有限公司 | A kind of moving source exhaust emission gas rapid detection system and detection method |
| CN109187343A (en) * | 2018-08-31 | 2019-01-11 | 中煤科工集团重庆研究院有限公司 | The laser methane of gas drainage pipeline is popped one's head in |
| CN108956517A (en) * | 2018-09-11 | 2018-12-07 | 哈尔滨工业大学 | A kind of real-time online continuously monitors the device and its application method of sulfate concentration |
| CN109632681A (en) * | 2018-12-29 | 2019-04-16 | 青岛海纳光电环保有限公司 | Surrounding air sulfur dioxide detection device and detection method |
| CN109632681B (en) * | 2018-12-29 | 2023-08-15 | 青岛崂应海纳光电环保集团有限公司 | Method for detecting sulfur dioxide in ambient air |
| CN111912806A (en) * | 2020-06-18 | 2020-11-10 | 深圳市安车检测股份有限公司 | NOx gas concentration detection platform |
| CN113406023A (en) * | 2021-05-24 | 2021-09-17 | 哈尔滨工程大学 | Natural gas combustible gas component concentration on-line measuring device |
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