CN1563946A - SO2 gas density monitoring and its monitoring method - Google Patents
SO2 gas density monitoring and its monitoring method Download PDFInfo
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- CN1563946A CN1563946A CN 200410013672 CN200410013672A CN1563946A CN 1563946 A CN1563946 A CN 1563946A CN 200410013672 CN200410013672 CN 200410013672 CN 200410013672 A CN200410013672 A CN 200410013672A CN 1563946 A CN1563946 A CN 1563946A
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Abstract
The monitoring system includes serial connected light source, lens (2), gas to be detected, lens (4), spectrograph and computer. Monitoring procedure includes following steps: (a) spectrum of gas to be detected is obtained by spectrograph; (b) peak value and valley value adjacent wave are taken from wavelength about 300nm; (c) peak value is I (lambda 1), and valley value is I (lambda 2); (d) concentration of SO2 is N obtained from formula N=-Ln[I(lambda 1)/I (lambda 2)]/{[delta (lambda 1) - delta (lambda 2)]XL}; Delta (lambda 1), delta (lambda 2) are values of absorption cross-section of SO2 at wavelengths (lambda 1) and (lambda 2), L is light path in gas to be detected.
Description
Technical field:
The present invention relates to the monitoring system and the method for gas concentration, specifically is a kind of concentration monitor system and method for sulfur dioxide gas.
Background technology:
Along with expanding economy, being discharged into airborne sulphuric dioxide constantly increases, and surpasses 2,000 ten thousand tons for years, occupies first place in the world.The pollutants such as sulphuric dioxide of coal-fired power station boiler discharging as not controlled, will be caused serious urban air pollution, and acid rain area build up will cause heavy losses to people's life and property.The smoke pollution of China's coal fired power plant improvement at present emission control dynamics continues to increase, and relevant department has formulated new environmental regulation, to SO
2Pollutants such as gas are carried out overall control, and will carry out pollution charge.Therefore, research is just imperative to the on-line monitoring technique of coal-fired power station boiler pollutant emission.The technology that realizes online gas-monitoring mainly contains difference absorption spectrum (DOAS) technology, laser radar (LIDAR) technology and diode laser spectrum technology.Wherein, the general applied optics parametric oscillator of DOAS technology is as emissive source, and the costing an arm and a leg of optical parametric oscillator, and this technology is to spectroscopic instruments, and the requirement of sensitive detection parts is very high, so cause the cost of equipment set very high.Present DOAS technology generally obtains the absorption spectrum of gas to be measured with grating monochromator scanning, measure simultaneously because detector can't be composed institute's photometry, thereby make measurement result very easily be subjected to the influence of light source stability and pollutant state variation; And the DOAS method generally adopts the method deal with data of curve fitting, and calculation of complex, resultant error is also bigger sometimes.And the LIDAR technology is subjected to the influence of external environment easily, can descend along with the increase of wind speed as the precision of its measurement, and cost an arm and a leg generally in up to ten million units, is unfavorable for popularizing and promoting.The equipment maintenance cost of LIDAR is also very high, so it seldom is used for the real-time monitoring to dusty gas, mainly as the generaI investigation of dusty gas.Though the diode laser spectrum technical costs is on the low side, its wavelength tuning range is 0.01nm usually, and this has limited SO
2Measurement etc. big molecular gas.
Summary of the invention:
The purpose of this invention is to provide a kind of concentration of SO 2 gas monitoring system and monitoring method thereof.The present invention can be online to SO
2The concentration of gas is monitored.The present invention comprises tested gas 3, and it also comprises light source 1, lens 2, lens 4, spectrograph 5, computing machine 6; The light output end scioptics 2 of light source 1, tested gas 3, lens 4 are input to the light detection input end of spectrograph 5, and the data output end of spectrograph 5 connects the data input pin of computing machine 6; Monitoring method of the present invention: (a). obtain the spectrum of tested gas 3 by spectrograph 5, (b). get one group of peak value and valley that wavelength is adjacent in wavelength 300nm vicinity, (c). getting peak value is I (λ
1), getting valley is I (λ
2), (d). above-mentioned two values are brought into N=-Ln[I (λ
1) ÷ I (λ
2)] ÷ { [σ (λ
1)-σ (λ
2)] * the L} formula in, can draw SO in the tested gas 3
2The concentration of gas, the σ (λ in the formula
1) be SO
2In wavelength X
1The absorption cross section value at place, σ (λ
2) be SO
2In wavelength X
2The absorption cross section value at place, L is the distance that light is advanced in tested gas 3, N is SO in the tested gas 3
2The mean concentration of gas.The present invention has simple in structure, easy to operate, low-cost, high precision, and can be online to SO
2The concentration of gas is monitored.
Description of drawings:
Fig. 1 is a system architecture synoptic diagram of the present invention.
Embodiment:
In conjunction with Fig. 1 present embodiment is described, present embodiment is made up of tested gas 3, light source 1, lens 2, lens 4, spectrograph 5, computing machine 6; The light output end scioptics 2 of light source 1, tested gas 3, lens 4 are input to the light detection input end of spectrograph 5, and the data output end of spectrograph 5 connects the data input pin of computing machine 6; Monitoring method of the present invention: (a). obtain the spectrum of tested gas 3 by spectrograph 5, (b). get one group of peak value and valley that wavelength is adjacent in wavelength 300nm vicinity, (c). getting peak value is I (λ
1), getting valley is I (λ
2), (d). above-mentioned two values are brought into N=-Ln[I (λ
1) ÷ I (λ
2)] ÷ { [σ (λ
1)-σ (λ
2)] * the L} formula in, can draw SO in the tested gas 3
2The concentration of gas, the σ (λ in the formula
1) be SO
2In wavelength X
1The absorption cross section value at place, σ (λ
2) be SO
2In wavelength X
2The absorption cross section value at place, L is the distance that light is advanced in tested gas 3, N is SO in the tested gas 3
2The mean concentration of gas.What light source 1 was selected for use is deuterium lamp or xenon lamp, and lens 2, lens 4 are all selected quartz lens for use, and the model that spectrograph 5 is selected for use is HR2000.
Claims (2)
1, concentration of SO 2 gas monitoring system, it comprises tested gas (3), it is characterized in that it also comprises light source (1), lens (2), lens (4), spectrograph (5), computing machine (6); The light output end scioptics (2) of light source (1), tested gas (3), lens (4) are input to the light detection input end of spectrograph (5), and the data output end of spectrograph (5) connects the data input pin of computing machine (6).
2, the monitoring method of concentration of SO 2 gas is characterized in that (a). obtain the spectrum of tested gas (3) by spectrograph (5), (b). get one group of peak value and valley that wavelength is adjacent in wavelength 300nm vicinity, (c). and getting peak value is I (λ
1), getting valley is I (λ
2), (d). above-mentioned two values are brought into N=-Ln[I (λ
1) ÷ I (λ
2)] ÷ { [σ (λ
1)-σ (λ
2)] * L) in the formula, can draw SO in the tested gas (3)
2The concentration of gas, the σ (λ in the formula
1) be SO
2In wavelength X
1The absorption cross section value at place, σ (λ
2) be SO
2In wavelength X
2The absorption cross section value at place, L is the distance that light is advanced in tested gas (3), N is SO in the tested gas (3)
2The mean concentration of gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410013672 CN1258081C (en) | 2004-04-09 | 2004-04-09 | SO2 gas density monitoring and its monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410013672 CN1258081C (en) | 2004-04-09 | 2004-04-09 | SO2 gas density monitoring and its monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563946A true CN1563946A (en) | 2005-01-12 |
| CN1258081C CN1258081C (en) | 2006-05-31 |
Family
ID=34478239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410013672 Expired - Fee Related CN1258081C (en) | 2004-04-09 | 2004-04-09 | SO2 gas density monitoring and its monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1258081C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504366B (en) * | 2009-03-10 | 2011-07-20 | 哈尔滨工业大学 | Oxygen concentration detecting instrument |
| CN101498665B (en) * | 2009-02-27 | 2011-09-21 | 哈尔滨工业大学 | Sulphur dioxide gas concentration detection apparatus based on associated spectrum technology |
| CN102226752A (en) * | 2011-04-08 | 2011-10-26 | 常熟舒茨电子科技发展有限公司 | Method for detecting concentration of sulfur dioxide by using photoacoustic spectrometry |
| CN107271392A (en) * | 2017-06-12 | 2017-10-20 | 重庆大学 | One kind is based on gas differential absorption cross-section pattern measurement low concentration SO2Method |
| 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 |
| CN111551210A (en) * | 2020-05-29 | 2020-08-18 | 天津大学 | Real-time on-line measuring device for temperature and sulfur dioxide gas concentration |
| CN112697711A (en) * | 2020-12-14 | 2021-04-23 | 中国科学院合肥物质科学研究院 | Snapshot type remote measurement system for mobile source waste gas |
-
2004
- 2004-04-09 CN CN 200410013672 patent/CN1258081C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498665B (en) * | 2009-02-27 | 2011-09-21 | 哈尔滨工业大学 | Sulphur dioxide gas concentration detection apparatus based on associated spectrum technology |
| CN101504366B (en) * | 2009-03-10 | 2011-07-20 | 哈尔滨工业大学 | Oxygen concentration detecting instrument |
| CN102226752A (en) * | 2011-04-08 | 2011-10-26 | 常熟舒茨电子科技发展有限公司 | Method for detecting concentration of sulfur dioxide by using photoacoustic spectrometry |
| CN107271392A (en) * | 2017-06-12 | 2017-10-20 | 重庆大学 | One kind is based on gas differential absorption cross-section pattern measurement low concentration SO2Method |
| CN107271392B (en) * | 2017-06-12 | 2019-04-26 | 重庆大学 | One kind being based on gas differential absorption cross-section pattern measurement low concentration SO2Method |
| 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 |
| CN111551210A (en) * | 2020-05-29 | 2020-08-18 | 天津大学 | Real-time on-line measuring device for temperature and sulfur dioxide gas concentration |
| CN112697711A (en) * | 2020-12-14 | 2021-04-23 | 中国科学院合肥物质科学研究院 | Snapshot type remote measurement system for mobile source waste gas |
| CN112697711B (en) * | 2020-12-14 | 2023-09-19 | 中国科学院合肥物质科学研究院 | Mobile source waste gas snapshot type telemetry system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1258081C (en) | 2006-05-31 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HARBIN UNIVERSITY OF TECHNOLOGY BEIXIN HENGYE ENER Free format text: FORMER OWNER: HARBIN INSTITUTE OF TECHNOLOGY Effective date: 20090522 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090522 Address after: Room 9, floor 911, Harbin Science and Technology Park building, 434 postal street, Nangang District, Heilongjiang, Harbin Patentee after: Harbin Dongda Beixin Hengye Energy Technology Co., Ltd. Address before: No. 92 West straight street, Nangang District, Heilongjiang, Harbin Patentee before: Harbin Institute of Technology |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060531 Termination date: 20140409 |