CN201402247Y - Tunable laser diode double-optical path industrial flue on-line monitoring device - Google Patents
Tunable laser diode double-optical path industrial flue on-line monitoring device Download PDFInfo
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- CN201402247Y CN201402247Y CN2008202393433U CN200820239343U CN201402247Y CN 201402247 Y CN201402247 Y CN 201402247Y CN 2008202393433 U CN2008202393433 U CN 2008202393433U CN 200820239343 U CN200820239343 U CN 200820239343U CN 201402247 Y CN201402247 Y CN 201402247Y
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- tunable laser
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Abstract
The utility model relates to a tunable laser diode double-optical path industrial flue on-line monitoring device which comprises a left monitoring device and a right monitoring device; the tail of theleft monitoring device is provided with a multi-dimensional adjusting frame; an optical fiber coupler is fixed on the multi-dimensional adjusting frame; a sample pool is arranged in front of the optical fiber coupler; a reflection mirror is arranged in front of the sample pool; the other multi-dimensional adjusting frame with the other optical fiber coupler is fixed right below the reflection mirror; the other optical fiber coupler is connected with a far-end photodiode by an optical fiber, and a transparent window film is arranged in front of the reflection mirror; the right monitoring device is provided with the other transparent window film which is arranged in the center of a flange and is symmetric with the left transparent window film; and the tail of the right monitoring device isalso provided with a corner reflector. Compared with the prior on-line monitoring method and the commonly used opposite-type single-optical path system, the tunable laser diode double-optical path industrial flue on-line monitoring device improves the sensitivity of measuring the concentration of toxic and harmful gas in the flue in real time, separates an optical system from a signal processing and control module by the optical fiber coupler and optical fiber transmission, and prevents the possibility of danger when monitoring in the inflammable and explosive environment.
Description
Technical field
The utility model relates to a kind ofly measures device for monitoring to gas concentration, especially a kind of device that utilizes tunable laser diodes absorption spectrum technology to the industrial flue on-line monitoring.
Background technology
All need HCL, H in many relevant commercial production to discharging in the flue
2Toxic and harmful such as S, CO concentration is monitored in real time, and monitoring result is used to improve technology, the aspects such as reduction pollution, saving energy in kiln and environmental monitoring of production.The tradition gas detection adopts extraction-type detection methods such as vapor-phase chromatography, wet-chemical, but extraction-type is measured and preprocessing process has tens seconds time delays to the magnitude of a few minutes, so can not carry out real-time analysis and continuous monitoring.Often temperature is very high for gas in the industrial discharge process in addition, and the maintenance cost of take a sample very difficult and extraction system is bigger.Tunable semiconductor laser absorption spectrum technology (TDLAS) is a kind of novel gas detection method that development in recent years is got up, it utilizes the tunable characteristic of semiconductor laser to carry out a kind of absorption spectrum technology of spectral detection, by combining with wavelength-modulated and harmonic wave Detection Techniques, utilize the narrow linewidth of semiconductor laser, tunable characteristic, the biography of shaking by scanning gas absorbs the fast detecting that line is realized gas concentration, traditional gas monitoring method of comparing, do not need gas is sampled, thereby having avoided the interference to air-flow or other gases, is a kind of high sensitivity, high resolving power, high selectivity, the gas detection technology of quick response.When this measuring technique was applied in the flue gas measurement of concetration, the normal employing was fixed in chimney pipeline one side with the semiconductor laser transmitting illuminant, and the photodetection receiver module is fixed in the monochromatic light journey correlation optical measuring method of pipeline opposite side.Utilize this mensuration, when gas concentration is measured, its sensitivity has and reaches certain measuring limit, and contain under the hazardous industry environment of flammable explosive gas (as methane) at some, as the monitoring method that uses this LASER Light Source and photodetection module and chimney to be fixed as one, electric current can increase the possibility of these gases of ignition and blasting when operation.
The utility model content
The purpose of this utility model provides the two light path industrial flue on-Line Monitor Device of a kind of tunable laser diodes, the inflammable and explosive dangerous problem of appearance when the toxic and harmful of flue discharging being monitored, and the lower problem of monitoring sensitivity to solve present technology.
In order to achieve the above object, the technical scheme that the utility model adopted is:
The two light path industrial flue on-Line Monitor Device of a kind of tunable laser diodes, it is characterized in that: include exhaust gases passes, on the and arranged on left and right sides wall of described exhaust gases passes perforate is arranged, the perspective window is installed in the perforate, the perforate of two side is separately installed with cylindrical shell outward; LASER Light Source and Computer Control Unit thereof are arranged, the exit end of LASER Light Source is coupled with outgoing optical fiber, described outgoing optical fiber is incorporated in the cylindrical shell in described left side, in the light path in the place ahead, termination of described outgoing optical fiber, the light absorption pond is installed, the place ahead, light absorption pond is equipped with 45 ° of plane mirrors, described plane mirror central authorities have beam orifice, the reflecting surface of plane mirror is towards the cylindrical shell direction on right side, reception optical fiber is installed in the cylindrical shell in described left side, and the termination of described reception optical fiber is positioned at the plane mirror below; In the cylindrical shell on described right side corner reflector is installed, receives the also emergent light of reflector laser light source; Described reception optical fiber inserts photodiode, and photodiode output signals is input to Computer Control Unit through behind the prime amplifier.
The perforate of described exhaust gases passes both sides is equipped with flange outward, on the described left and right side cylindrical shell flange is arranged also, and the flange on the described left and right side cylindrical shell is fixedlyed connected with the flange on the flue gas Tong Bi two side respectively.
Described outgoing optic fibre end is linked into the afterbody of the fiber coupler in the cylindrical shell of left side.
Described light absorption has air intake opening and gas outlet on the pond, and valve is arranged respectively on air intake opening and the gas outlet.
Two light path industry on-Line Monitor Device are according to narrating in youth primary-Bill absorption law: light is by absorbing gas light intensity variation and concentration and linear this principle of light path afterwards, when flue gas is carried out on-line monitoring, put a corner reflector by being sidelong at exhaust gases passes one to be measured, the laser-bounce that opposite side launches is gone back, absorb light path in order to improve, thereby improve sensitivity to the gas concentration monitoring, this method is compared the absorption light path that is doubled with the correlation method, therefore the monitoring sensitivity for gas concentration also is doubled accordingly.Under the inflammable and explosive environment of industry, when the method is applied to flue emission gases concentration monitor, the scheme that has adopted optical system and far-end Monitoring and Controlling module to be separated, by fiber coupler and long-distance optical fiber, module is accepted in LASER Light Source, photodetection, and follow-up processing unit places the safety zone of no flammable explosive gas, avoided taking place in observation process the possibility of security incident.
The present invention compares with the correlation monochromatic light journey system that uses always with the on-line monitoring method, has improved the sensitivity that flue toxic and harmful concentration is measured in real time.By fiber coupler and Optical Fiber Transmission, optical system and signal Processing and control module are separated the possibility of causing danger when avoiding under inflammable and explosive environment monitoring.
Description of drawings
Accompanying drawing is the utility model structural representation.
Embodiment
The two light path industrial flue on-Line Monitor Device of a kind of tunable laser diodes, comprise a left side, the right side cylindrical shell, a described left side, the right side cylindrical shell is installed in flue 10 both sides by ring flange and bolt 9, cylindrical shell 17 afterbodys in the left side have multidimensional adjustment rack 1, be fixed with fiber coupler 2 on the multidimensional adjustment rack 1, described fiber coupler 2 is connected with the far-end LASER Light Source by outgoing optical fiber, be equipped with sample cell 4 in fiber coupler 2 the place aheads, it is with holes and with 45 plane inclined catoptron 16 that sample cell 4 the place aheads are equipped with the center, be equipped with the multidimensional adjustment rack 15 that is fixed with another fiber coupler 14 under the described plane mirror 16, described another fiber coupler 14 is connected with the far-end photodiode by receiving optical fiber, there is perspective window 13 in described catoptron 16 the place aheads, and described perspective window 13 is positioned on ring flange 8 centers; The perspective window that is placed in ring flange center and the perspective window symmetry in left side are arranged in the cylindrical shell 11 on right side, and the cylindrical shell afterbody also is equipped with corner reflector 12 on the right side.Seal by the RUBBER O RunddichtringO in the described ring flange.Be fixed with purge gas mouth 7 on the described ring flange.On the air intake opening 3 of described sample cell and the gas outlet 5 valve 6 is arranged respectively.
After monitoring equipment connects, can carry out the adjusting of light path can adopt visible ruddiness to carry out the light path adjusting as light source earlier, switch to measurement light source again, in the Long-distance Control monitoring side, by temperature control and Current Control laser is modulated, the laser of output is fixed in the cylindrical shell on the fiber coupler 2 in the multidimensional adjustment rack 1 by Optical Fiber Transmission, by regulating the fine adjustment screw of fiber coupler afterbody, the distance of collimation lens and optical fiber end luminous point in the change fiber coupler is to obtain collimated ray.The control translation on the adjusting adjustment rack and the vernier adjustment knob of angle, change the fiber coupler position, make its collimation luminous energy that sends along the center pit of optical axis direction by the catoptron 16 of sample cell 4 and 45 ° of placements subsequently, arrive through flue gas to be measured on the corner reflector 12 of right side cylindrical shell 11 by perspective window 13, reflect by corner reflector again and should note when passing perspective window, flue gas to 45 to be measured ° mirror reflects surface modulation avoiding the light that reflects by corner reflector to enter the center pit of 45 ° of catoptrons once more.Catoptron again with light with 90 ° of directions reflex to the fixing fiber coupler 14 of adjustment rack 15 in collimation lens on, regulate on the adjustment rack and control the vernier adjustment knob of translation, angle and the fine adjustment screw of fiber coupler afterbody, make the incident collimated light can be coupled into optical fiber efficiently, and transferring to the photodiode of far-end, the signal that photodiode is gathered is handled by computer acquisition through behind the prime amplifier.
Claims (4)
1, the two light path industrial flue on-Line Monitor Device of a kind of tunable laser diodes, it is characterized in that: include exhaust gases passes, on the and arranged on left and right sides wall of described exhaust gases passes perforate is arranged, the perspective window is installed in the perforate, the perforate of two side is separately installed with cylindrical shell outward; LASER Light Source and Computer Control Unit thereof are arranged, the exit end of LASER Light Source is coupled with outgoing optical fiber, described outgoing optical fiber is incorporated in the cylindrical shell in described left side, in the light path in the place ahead, termination of described outgoing optical fiber, the light absorption pond is installed, the place ahead, light absorption pond is equipped with 45 ° of plane mirrors, described plane mirror central authorities have beam orifice, the reflecting surface of plane mirror is towards the cylindrical shell direction on right side, reception optical fiber is installed in the cylindrical shell in described left side, and the termination of described reception optical fiber is positioned at the plane mirror below; In the cylindrical shell on described right side corner reflector is installed, receives the also emergent light of reflector laser light source; Described reception optical fiber inserts photodiode, and photodiode output signals is input to Computer Control Unit through behind the prime amplifier.
2, the two light path industrial flue on-Line Monitor Device of tunable laser diodes as claimed in claim 1, it is characterized in that: the perforate of described exhaust gases passes both sides is equipped with flange outward, on the described left and right side cylindrical shell flange is arranged also, the flange on the described left and right side cylindrical shell is fixedlyed connected with the flange on the flue gas Tong Bi two side respectively.
3, the two light path industrial flue on-Line Monitor Device of tunable laser diodes as claimed in claim 1, it is characterized in that: described outgoing optic fibre end is linked into the afterbody of the fiber coupler in the cylindrical shell of left side.
4, the two light path industrial flue on-Line Monitor Device of tunable laser diodes as claimed in claim 1, it is characterized in that: described light absorption has air intake opening and gas outlet on the pond, and valve is arranged respectively on air intake opening and the gas outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008202393433U CN201402247Y (en) | 2008-12-30 | 2008-12-30 | Tunable laser diode double-optical path industrial flue on-line monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008202393433U CN201402247Y (en) | 2008-12-30 | 2008-12-30 | Tunable laser diode double-optical path industrial flue on-line monitoring device |
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| Publication Number | Publication Date |
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| CN201402247Y true CN201402247Y (en) | 2010-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008202393433U Expired - Fee Related CN201402247Y (en) | 2008-12-30 | 2008-12-30 | Tunable laser diode double-optical path industrial flue on-line monitoring device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288555A (en) * | 2011-07-26 | 2011-12-21 | 山西维力科技有限责任公司 | Bijection type high-temperature smoke sensor and real-time detection method |
| CN103528992A (en) * | 2013-10-25 | 2014-01-22 | 北京农业智能装备技术研究中心 | System and method for measuring methane distribution in livestock house |
| CN103808690A (en) * | 2014-03-01 | 2014-05-21 | 安徽中科瀚海光电技术发展有限公司 | Light-sensing terminal |
| CN104297169A (en) * | 2014-10-23 | 2015-01-21 | 中国科学院合肥物质科学研究院 | Stable compact type laser-transceiving integrated detection light path structure |
| CN104697947A (en) * | 2015-03-20 | 2015-06-10 | 中国科学院合肥物质科学研究院 | Co-optical-axis transmitting-receiving integrated type long-optical-path laser detection system |
| CN107271365A (en) * | 2017-08-23 | 2017-10-20 | 华纳创新（北京）科技有限公司 | A kind of device of on-line determination the escaping of ammonia in situ |
| CN107621459A (en) * | 2016-07-13 | 2018-01-23 | 富士电机株式会社 | Gas analyzing apparatus |
| CN108020528A (en) * | 2017-12-14 | 2018-05-11 | 北京航天易联科技发展有限公司 | A kind of laser-correlation device for realizing multi-method measurement |
| CN112345492A (en) * | 2020-11-25 | 2021-02-09 | 东北石油大学 | Probe device for multi-element thermal fluid in-situ laser detection |
| CN112964667A (en) * | 2021-02-05 | 2021-06-15 | 清华大学 | Temperature and component integration online measurement system in limited space equipment |
-
2008
- 2008-12-30 CN CN2008202393433U patent/CN201402247Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288555A (en) * | 2011-07-26 | 2011-12-21 | 山西维力科技有限责任公司 | Bijection type high-temperature smoke sensor and real-time detection method |
| CN103528992A (en) * | 2013-10-25 | 2014-01-22 | 北京农业智能装备技术研究中心 | System and method for measuring methane distribution in livestock house |
| CN103808690A (en) * | 2014-03-01 | 2014-05-21 | 安徽中科瀚海光电技术发展有限公司 | Light-sensing terminal |
| CN104297169A (en) * | 2014-10-23 | 2015-01-21 | 中国科学院合肥物质科学研究院 | Stable compact type laser-transceiving integrated detection light path structure |
| CN104697947A (en) * | 2015-03-20 | 2015-06-10 | 中国科学院合肥物质科学研究院 | Co-optical-axis transmitting-receiving integrated type long-optical-path laser detection system |
| CN104697947B (en) * | 2015-03-20 | 2017-09-19 | 中国科学院合肥物质科学研究院 | A kind of transmitting-receiving integrated distance light journey laser detection system of same optical axis |
| CN107621459A (en) * | 2016-07-13 | 2018-01-23 | 富士电机株式会社 | Gas analyzing apparatus |
| CN107271365A (en) * | 2017-08-23 | 2017-10-20 | 华纳创新（北京）科技有限公司 | A kind of device of on-line determination the escaping of ammonia in situ |
| CN108020528A (en) * | 2017-12-14 | 2018-05-11 | 北京航天易联科技发展有限公司 | A kind of laser-correlation device for realizing multi-method measurement |
| CN112345492A (en) * | 2020-11-25 | 2021-02-09 | 东北石油大学 | Probe device for multi-element thermal fluid in-situ laser detection |
| CN112964667A (en) * | 2021-02-05 | 2021-06-15 | 清华大学 | Temperature and component integration online measurement system in limited space equipment |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100210 Termination date: 20171230 |
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| CF01 | Termination of patent right due to non-payment of annual fee |