CN205484030U - Ultraviolet absorption spectrum based adjustable wavelength measuring device for concentration of H2S and SO 2 mixed gas - Google Patents
Ultraviolet absorption spectrum based adjustable wavelength measuring device for concentration of H2S and SO 2 mixed gas Download PDFInfo
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- CN205484030U CN205484030U CN201620316905.4U CN201620316905U CN205484030U CN 205484030 U CN205484030 U CN 205484030U CN 201620316905 U CN201620316905 U CN 201620316905U CN 205484030 U CN205484030 U CN 205484030U
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- mixed gas
- light source
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- 238000000862 absorption spectrum Methods 0.000 title claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 39
- 238000000605 extraction Methods 0.000 claims abstract description 12
- 238000004458 analytical method Methods 0.000 claims abstract description 5
- 239000000523 sample Substances 0.000 claims description 33
- 239000013307 optical fiber Substances 0.000 claims description 11
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 7
- 229910052805 deuterium Inorganic materials 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 238000005286 illumination Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 238000011897 real-time detection Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 89
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 37
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 22
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 21
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000013068 control sample Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000011158 Prunus mume Nutrition 0.000 description 1
- 244000018795 Prunus mume Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to a based on ultraviolet absorption spectrum H2S and SO2The device comprises a light source module, an ultraviolet light waveband adjusting module, a mixed gas injection and extraction module and a gas concentration measurement and analysis module; the light source module is an ultraviolet light source; the ultraviolet light band adjusting module comprises a first lens and an ultraviolet cut-off filter; the mixed gas injection and extraction module comprises a sample cell, a first ball valve, a sample gas collection bottle, a second ball valve, a vacuum gauge, a vacuum pump and a second lens; the ultraviolet light source, the first lens, the ultraviolet cut-off filter, the sample cell and the lenses are sequentially arranged in sequence and coaxially distributed; the sample gas collecting bottle is connected with the sample pool; the vacuum gauge and the vacuum pump are respectively connected with the sample cell. The utility model discloses utilize the ultraviolet absorption spectrum technique, the ultraviolet ray can be absorbed by these two kinds of gas characteristics, has realized real-time detection and automatic measure.
Description
Technical field
This utility model belongs to mixed gas concentration measuring instrument technical field, specifically based on ultra-violet absorption spectrum H2S and
SO2Mixed gas concentration wavelengthtunable measurement apparatus.
Background technology
For the present situation of present society development, also result in a large amount of consumption of energy while economic development, and then cause environment
The problem polluted is increasingly severe, and atmospheric pollution is also the most serious in multiple environmental pollution one, is directed to atmospheric pollution
Major pollutants H in thing2S and SO2For the measurement of gas, the H of conventional traditional measurement low concentration2S and SO2The side of mixed gas
Method is mainly chemical analysis, i.e. needs to take at the scene sample, is brought to laboratory or carries out point with specific instrument at the scene
Analysis, so operation are more complicated, and need bigger manpower and real-time the most poor, and additionally the prunus mume (sieb.) sieb.et zucc. Wei Peng of University Of Chongqing sends out
The Master's thesis SO2 based on Differential UV spectroscopy of table, the detection algorithm research of NOX mixed gas, simply probably analyze in literary composition
Some noise reduction means and improve precision by different inversion algorithms, poor real and operation calculate wants complicated a lot；Application
Number be 200910135826.8 Chinese invention patent application disclose a kind of intelligent ultraviolet gas analyzer product, this patent is to adopt
Gas concentration is measured, it is impossible to avoid the ectocine produced in respective light path and circuit, it is difficult to high-precision with two photodetectors
Spend, stably realize the measurement of light concentration gas.Now for dusty gas the effective means of detection and technology still relative to
For be fewer, for the H in its Air Pollutants2S and SO2Measure the Technology application real-time gas to actual type
Detecting instrument is more few, and technological means is the most immature, and certainty of measurement is not the highest；Therefore exploitation has on-line monitoring
H2S and SO2The high-precision instrument of mixed gas concentration value function for our response environment pollutes in the urgent need to.
Utility model content
The purpose of this utility model is to overcome prior art measurement error big and certainty of measurement is low waits deficiency, it is provided that one ultraviolet
Absorption spectrum H2S and SO2Mixed gas concentration tunable optical wave measuring apparatus.The combination ultraviolet filter of this utility model measurement apparatus innovation
Sample cell that rate of absorbing UV that wave plate, the fiber spectrometer of maya2000pro, quartz glass do is low and computer and other
Additional device；On-line checking H when achieving high-precision real2S and SO2The concentration value of mixed gas；Wherein adjusted by ultraviolet light wave band
Joint module, it is possible to realize manually regulating optical band, can single survey one of which gas (H2S gas) concentration value；Whole H2S and
SO2The measurement error of mixed gas concentration measurement apparatus is little, and certainty of measurement is high.
This utility model solves technical problem and be the technical scheme is that
A kind of mixed gas concentration wavelengthtunable measurement apparatus based on ultra-violet absorption spectrum, this device includes light source module, ultraviolet
Optical band adjustment module, mixed gas inject extraction module and gas concentration measurement analyzes module；Wherein light source module, ultraviolet light
Wave band adjustment module, mixed gas inject extraction module and gas concentration measurement analyzes module according to the order arrangement of light source direction of illumination；
Described light source module is ultraviolet source；
Described ultraviolet light wave band adjustment module includes the first lens and ultraviolet cut-on filter plate two parts；
Described mixed gas is injected extraction module and is included sample cell, sample sets gas cylinder, vacuometer, vacuum pump and the second lens；
Wherein it is sequentially arranged before and after ultraviolet source, the first lens, ultraviolet cut-on filter plate, sample cell, the second lens and is coaxially distributed；
Sample sets gas cylinder is connected with sample cell；Vacuometer, vacuum pump are connected with sample cell respectively；
Described gas concentration measurement is analyzed the composition of module and is included optical fiber, spectrogrph and computer；Wherein optical fiber, spectrogrph and meter
Calculation machine is sequentially connected with；The fibre-optical probe of optical fiber is positioned at the focal point of the second lens.
Described spectrogrph uses the fiber spectrometer of maya2000pro；Described ultraviolet source be deuterium lamp radiation 160nm～
The ultraviolet light of 450nm.
Compared with existing Gas Thickness Detecting Technology, this utility model overcomes the feature that conventional chemical detection error is big and precision is low,
Achieve real-time detection and automatically measure, there is the biggest advance, being embodied in the following aspects:
(1) utility model device is to utilize ultra-violet absorption spectrum technology, and ultraviolet luminous energy is absorbed by both gas characteristics；And according to
Linear theory is derived a kind of new measurement H2S and SO2H in mixed gas2The measuring method of S gas concentration, this H2S is linear
Measuring method is simply effectively and certainty of measurement is high, and what additionally utility model device was innovated adds ultraviolet filter plate to regulate incident illumination
Wavelength, in the range of wavelength cut-off to 200nm, H2The characteristic absorption peak of S gas is in the range of 190nm～200nm, and SO2
Gas is the most weak in this wave band characteristic absorption, thus can measure H the most accurately2The concentration of S gas.
(2) measuring method is simple；We can be to the H on low concentration ground2S and SO2Mixed gas concentration detects together；And
And can reach to completely dispense with the automatic monitoring of human contact；And then reduce the impact of the caused error of anthropic factor.
(3) sensitivity of device instrument is also the highest；Only need to select appropriate spectral band for dusty gas, it measures knot
Fruit is just up to the concentration (can arrive ppm magnitude) of the highest order of magnitude；Reach the highest certainty of measurement.
Accompanying drawing explanation
Fig. 1 is that this utility model is based on ultra-violet absorption spectrum H2S and SO2The overall knot of mixed gas concentration wavelengthtunable measurement apparatus
Structure frame diagram.
Fig. 2 is that this utility model is based on ultra-violet absorption spectrum H2S and SO2The structural representation of mixed gas concentration measurement apparatus.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear,
It is fully described by, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.
Based on the embodiment in this utility model, the institute that those of ordinary skill in the art are obtained under not making creative work premise
There are other embodiments, broadly fall into the scope of this utility model protection.
As it is shown in figure 1, this utility model mixed gas concentration based on ultra-violet absorption spectrum wavelengthtunable measurement apparatus includes light source
Module 1, ultraviolet light wave band adjustment module 2, mixed gas inject extraction module 3 and gas concentration measurement analyzes module 4；Wherein
Light source module 1, ultraviolet light wave band adjustment module 2, mixed gas inject extraction module 3 and gas concentration measurement is analyzed module 4 and depended on
The direction of illumination order arrangement of irradiation source；
Described light source module 1 is ultraviolet source, and under DC source drives, deuterium lamp will send the wavelength purple at 160nm～450nm
Outer light；
Described ultraviolet light wave band adjustment module 2 includes the first lens 201 and ultraviolet cut-on filter plate 202 two parts, and light source is sent out
The ultraviolet light gone out is after collimated；Again by controllable by entering mixed gas injection extraction mould after ultraviolet cut-on filter plate
Block 3；
As in figure 2 it is shown, mixed gas inject extraction module 3 include sample cell the 301, first ball valve 302, sample sets gas cylinder 303,
Second ball valve 304, vacuometer 305, vacuum pump 306 and the second lens 307；The wherein deuterium lamp of light source module 1, the first lens
201, it is sequentially arranged and is coaxially distributed before and after ultraviolet cut-on filter plate 202, sample cell the 301, second lens 307；I.e. according to purple
The circuit of outer light is the most coaxially distributed；Sample sets gas cylinder 303 is connected with sample cell 301 through the first ball valve 302；Vacuometer 305,
Vacuum pump 306 is connected with sample cell 301 respectively through the second ball valve 304；
Particularly as follows: sample cell 301 is H2S and SO2Mixed gas detection container；Described ball valve 302 is to control sample sets
The valve that gas cylinder 303 circulates with sample cell 301 gas；Vacuometer 305 is the pressure in order to measure and control sample cell, maintains
Stable measurement environment；Described ball valve 306 is used to control to be connected with external environment, discharges the H after measuring2S and SO2Mixed gas；
Lens 307 will converge by sample cell again by H2S and SO2The near ultraviolet light beam of mixed gas characteristic absorption, after convergence
Light beam get to gas concentration measurement analyze module 4 optical fiber 401 fibre-optical probe on；
As in figure 2 it is shown, the composition that described gas concentration measurement analyzes module 4 includes optical fiber 401, spectrogrph 402, computer
403；Wherein optical fiber 401, spectrogrph 402 and computer 403 are sequentially connected with；The fibre-optical probe of optical fiber 401 is positioned at the second lens
The focal point of 307.
Spectrogrph 402 uses the fiber spectrometer of maya2000pro, plug and play type, resolution 0.3～1nm, wavelength width
Degree 160～450nm, has wide dynamic range and excellent ultraviolet reaction etc., can reduce electronic noise, automatically eliminate bias light
Impact, it is adaptable to the high ultraviolet sensitivity of low-light level sum, it is possible to meet the H to be measured of low concentration2S and SO2Mixed gas；
By H2S and SO2The near ultraviolet light beam of mixed gas characteristic absorption carries out analog conversion processing in spectrogrph, finally will be by spectrum
The numerical data of instrument conversion is delivered on coupled computer 403, and computer processes equipped with the data corresponding with spectrogrph
Software, obtains H2S and SO2The characteristic absorption spectrum figure of mixed gas, equipped with Originpro8.1 light in its Computer 403
Spectrum professional cartography data analysis software；
Described based on ultra-violet absorption spectrum H2S and SO2Mixed gas concentration wavelengthtunable measurement apparatus operation principle and measurement used
Cheng Shi:
First it is operation principle: this utility model H2S and SO2What mixed gas concentration measurement apparatus relied on is that know-why is
Beer-Lambert law is theoretical basis and combines line style theory, uses ultraviolet band absorption spectrum detection technique, utilizes mixing
Sulfur dioxide (SO in gas2) and hydrogen sulfide (H2S) the absorption spectrum overlapping range at 190nm～230nm carries out SO2And H2S
Mixed gas concentration measure.
This utility model is to measuring SO2And H2The wound New measuring technique of S mixed gas concentration value key is:
(1) first SO in survey calculation mixed gas2Concentration value because H2The absorption spectrum of S gas will not be to surveying SO2Dense
SO required during angle value2Characteristic absorption spectrum impact, from Beer-Lambert law computing formula, for SO2
The concentration value of gas can be reflected by the peak-to-valley ratio of its characteristic absorption spectrum, then further according to the peak valley of surveyed mixed gas spectrum
Characteristic, selects the several peak valley closely of wavelength on absorption spectrum to derive gas SO2Concentration value, this utility model oneself compile
Write one section and gather calculating SO2The program of concentration peak-to-valley ratio, utilize the program write to obtain directly and accurately organizing SO more2Gas is special
Levy absworption peak valley, several groups of peak valley ratios are tried to achieve meansigma methods, is directly obtaining surveyed SO finally by program2Exact concentrations value.
(2) conventional technology is difficult to H2The absorption spectrum of S gas is from SO2And H2The spectrum of S mixed gas extracts, and
And for spectral technique independent measurement H2S gas concentration technical method is also little, and this utility model has been started a kind of simple effective
H2S gas concentration measurement technological means, first with SO2And H2The spectroscopic data value of S mixed gas deducts phase in mixed gas
The SO answered2Gas absorption spectra data value obtains H2The technology of the absorption spectrum of S gas, and during by first gathering without gas to be measured
Back end spectrogram, utilize the data of spectrum privately to deduct independent H2Again divided by back end spectrum number after the data of the spectrogram of S gas
According to obtaining H2The characteristic absorption peak figure of S gas, simulates H according to linear theory afterwards2S gas characteristic absworption peak and its concentration value
Linearity curve, last H2The concentration value of S gas can be obtained by linearity curve characteristic absorption peak being directly substituted into institute's matching good.
(3) what this utility model was innovated in terms of measurement apparatus is provided with ultraviolet light wave band adjustment module, i.e. in light source and beginning
One ultraviolet cut-on filter plate is set between lens, can manually regulate the wavelength inciding sample cell light, wavelength cut-off is arrived
In the range of 200nm, because H2The characteristic absorption peak of S gas is in the range of 190nm～200nm, and SO2Gas is in this wave band feature
Absorb the most weak, the band of light of other more than 200nm is ended to fall the also corresponding gas to be measured that enhances and inhales the effective of this band of light
Receive；Thus can measure H the most accurately2The concentration of S gas.
B. this utility model measures use process: first passes through deuterium lamp light source and sends near ultraviolet light, when light source need to be stablized a bit of
Between, when preventing from just turning on the power, deuterium lamp sends UV fiber disturbance can be occurred to affect device to SO2And H2S mixed gas concentration is surveyed
The precision of amount result impacts；The ultraviolet that light source sends is purple through collimated again after first passing through adjustable ultraviolet cut-on filter plate
Outer light；Ultraviolet collimated light beam after being collimated the most again passes through sample cell 301；Open ball valve 302 the most again by gas collecting bottle
The SO of concentration to be measured in 3032And H2S mixed gas is injected in sample cell, afterwards near ultraviolet light beam again by sample cell time through institute
SO to be surveyed2And H2After S mixed gas characteristic absorption, then on the fibre-optical probe that lens 307 converge to optical fiber 401；Then
In fiber-optic transfer to spectrogrph 402, through spectrogrph, the data of transmission are carried out data conversion, mainly convert through analog,
Recently enter computer 403 to process, at the graph curve demonstrating spectral signal with spectrogrph special-purpose software；The most again
Data measured and spectrogram are carried out Treatment Analysis.
Embodiment 1
The present embodiment uses above-mentioned annexation, and wherein light source mechanism uses the deuterium lamp light source of DC driven, is used for obtaining near ultraviolet
Light beam, described spectrogrph 402 uses the fiber spectrometer of maya2000pro, be used for accepting gathering by after sample cell by
Data are carried out analog conversion processing by the black light that gas characteristic absorbs.
This utility model is not addressed part and is applicable to prior art.
Claims (2)
1. one kind based on ultra-violet absorption spectrum H2S and SO2Mixed gas concentration wavelengthtunable measurement apparatus, is characterized by that this device includes that light source module, ultraviolet light wave band adjustment module, mixed gas inject extraction module and gas concentration measurement analyzes module；Wherein, light source module, ultraviolet light wave band adjustment module, mixed gas inject extraction module and gas concentration measurement analysis module according to the order arrangement of light source direction of illumination；
Described light source module is ultraviolet source；
Described ultraviolet light wave band adjustment module includes the first lens and ultraviolet cut-on filter plate two parts；
Described mixed gas is injected extraction module and is included sample cell, sample sets gas cylinder, vacuometer, vacuum pump and the second lens；Wherein it is sequentially arranged before and after ultraviolet source, the first lens, ultraviolet cut-on filter plate, sample cell, the second lens and is coaxially distributed；Sample sets gas cylinder is connected with sample cell；Vacuometer, vacuum pump are connected with sample cell respectively；
Described gas concentration measurement is analyzed the composition of module and is included optical fiber, spectrogrph and computer；Wherein optical fiber, spectrogrph and computer are sequentially connected with；The fibre-optical probe of optical fiber is positioned at the focal point of the second lens.
2. as claimed in claim 1 based on ultra-violet absorption spectrum H2S and SO2Mixed gas concentration wavelengthtunable measurement apparatus, is characterized by that described spectrogrph uses the fiber spectrometer of maya2000pro；Described light source module medium ultraviolet light source is the ultraviolet light of 160nm～450nm of deuterium lamp radiation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620316905.4U CN205484030U (en) | 2016-04-13 | 2016-04-13 | Ultraviolet absorption spectrum based adjustable wavelength measuring device for concentration of H2S and SO 2 mixed gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620316905.4U CN205484030U (en) | 2016-04-13 | 2016-04-13 | Ultraviolet absorption spectrum based adjustable wavelength measuring device for concentration of H2S and SO 2 mixed gas |
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| CN205484030U true CN205484030U (en) | 2016-08-17 |
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| CN201620316905.4U Expired - Fee Related CN205484030U (en) | 2016-04-13 | 2016-04-13 | Ultraviolet absorption spectrum based adjustable wavelength measuring device for concentration of H2S and SO 2 mixed gas |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596444A (en) * | 2016-12-08 | 2017-04-26 | 哈尔滨工业大学 | Oxygen concentration measuring system based on ultraviolet broadband absorption spectrum and measuring method |
| CN108287141A (en) * | 2017-12-21 | 2018-07-17 | 北京遥测技术研究所 | A kind of multicomponent gas concentration analysis method based on spectroscopic methodology |
| 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 |
| CN109238996A (en) * | 2018-09-11 | 2019-01-18 | 哈尔滨工业大学 | A kind of real-time online continuously monitors the device and its application method of nitrate concentration |
| CN110470630A (en) * | 2018-05-11 | 2019-11-19 | 西安电子科技大学 | A kind of distribution type fiber-optic gas sensor based on difference modes |
| CN110785655A (en) * | 2017-05-10 | 2020-02-11 | 奥普斯公司 | Method and system for determining H2S content |
| CN111912804A (en) * | 2019-11-28 | 2020-11-10 | 南开大学 | Ultraviolet spectrum detection method and device for monitoring trace sulfur dioxide in blast furnace flue gas |
| CN114184560A (en) * | 2021-11-09 | 2022-03-15 | 天津大学 | Spectral measurement device based on gas rapid mixing |
-
2016
- 2016-04-13 CN CN201620316905.4U patent/CN205484030U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596444A (en) * | 2016-12-08 | 2017-04-26 | 哈尔滨工业大学 | Oxygen concentration measuring system based on ultraviolet broadband absorption spectrum and measuring method |
| CN110785655A (en) * | 2017-05-10 | 2020-02-11 | 奥普斯公司 | Method and system for determining H2S content |
| CN108287141A (en) * | 2017-12-21 | 2018-07-17 | 北京遥测技术研究所 | A kind of multicomponent gas concentration analysis method based on spectroscopic methodology |
| CN108287141B (en) * | 2017-12-21 | 2020-11-10 | 北京遥测技术研究所 | Multi-component gas concentration analysis method based on spectrum method |
| CN110470630A (en) * | 2018-05-11 | 2019-11-19 | 西安电子科技大学 | A kind of distribution type fiber-optic gas sensor based on difference modes |
| 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 |
| CN109238996A (en) * | 2018-09-11 | 2019-01-18 | 哈尔滨工业大学 | A kind of real-time online continuously monitors the device and its application method of nitrate concentration |
| CN111912804A (en) * | 2019-11-28 | 2020-11-10 | 南开大学 | Ultraviolet spectrum detection method and device for monitoring trace sulfur dioxide in blast furnace flue gas |
| CN111912804B (en) * | 2019-11-28 | 2022-09-23 | 南开大学 | Ultraviolet spectrum detection method and device for monitoring trace sulfur dioxide in blast furnace flue gas |
| CN114184560A (en) * | 2021-11-09 | 2022-03-15 | 天津大学 | Spectral measurement device based on gas rapid mixing |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20170413 |