CN205317662U - UV spectrum flue gas analyzer - Google Patents
UV spectrum flue gas analyzer Download PDFInfo
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- CN205317662U CN205317662U CN201620026496.4U CN201620026496U CN205317662U CN 205317662 U CN205317662 U CN 205317662U CN 201620026496 U CN201620026496 U CN 201620026496U CN 205317662 U CN205317662 U CN 205317662U
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Abstract
The utility model relates to a UV spectrum flue gas analyzer, belong to smoke detection technical field, the utility model provides a reject the light intensity along with the slow part that changes of wavelength in absorption spectrum, and only leave the part along with wavelength quick change, then go the gaseous concentration of inverting with the quick change part, thereby can avoid because the light source temperature is floated or is attenuateed, the dust disturbs, measured value fluctuation that factors such as other gaseous interference arouse and the UV spectrum flue gas analyzer who drifts about, the light source of technical scheme for launch the parallel light in being used for depositing gaseous airtight air chamber and being used for to the air chamber that adopts, the one end of airtight air chamber is provided with the optical fiber sensor who is used for receiving the parallel light, optical fiber sensor is connected with the spectrum appearance, be provided with temperature sensor and oxygen sensor on the airtight air chamber, airtight air chamber still is provided with air intake duct and sample gas intake pipe, a weighing sensor and a temperature sensor, the oxygen sensor, spectrum appearance and light source all are connected with the main control unit, the utility model discloses extensively be used for the detection of flue gas.
Description
Technical field
The utility model relates to a kind of UV spectrum flue gas analyzing apparatus, belongs 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 sulfurous gas, its principle is that the ultraviolet lighting near 190 ~ 230nm is when being mapped to tested gas, sulfur dioxide molecule absorbs the energy of UV-light, and molecule is subject to exciting when returning ground state from high level and sends fluorescence. N2 in air, O2 does not cause " fluorescent quenching effect " substantially, and the SO2 of excited state returns ground state mainly through fluorescence process, utilizes photomultiplier to receive the fluorescence sent out, it is very high that the monitoring sensitivity to SO2 is sent out in Ultraluminescence, and fluorescent intensity size can reflect the concentration of sulfurous gas. The method can monitor the low concentration SO 2 of the ppb order of magnitude, and dynamicrange and the linear lag are fine simultaneously, is therefore used for quality of air environment monitoring. When being applied in flue gas monitoring, it is necessary to being equipped with dilution method sampling thief, system is very complicated. Tunable laser (TunableLaser), refers to the laser apparatus that can change laser output wavelength within the specific limits continuously. The purposes of this kind of laser apparatus is extensive, 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 big, and spectrum line is narrow, it is possible to for the detection of multiple gases. Generally there are two kinds of mode of operation: a kind of is the backscattering utilizing tested gas, obtain dusty gas distribution spatially, based on differential absorption lidar technology. Another kind utilizes reverberator to obtain the mean concns on light path direction, and light meets langbobier law to transmitted light with launching. The advantage of the method almost to measure all gas, responds fast precision height.The cost that shortcoming is the tunable laser of middle infrared region is too high, and gas with various detection need to be equipped with Different Light, and the absorption line strengths that the laser apparatus of near-infrared region produces is lower, is unfavorable for measuring.
Practical novel content
For solving the technical problem that prior art exists, the utility model provides a kind of part rejected light intensity in absorption spectrum and slowly change with wavelength, and only leave the part with wavelength Rapid Variable Design, then the concentration of inverting gas is gone by Rapid Variable Design part, such that it is able to avoid because the observed value that the factor such as the drift of light source temperature or decay, dust interference, other gas interference causes fluctuates and the UV spectrum flue gas analyzing apparatus of drift.
For achieving the above object, the technical scheme that the utility model adopts is a kind of UV spectrum flue gas analyzing apparatus, comprise the 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 parallel light, described Fibre Optical Sensor is connected with spectrograph, described sealed gas chamber is provided with temperature sensor and oxygen sensor, sealed gas chamber is also provided with air inlet pipe and sample gas inlet pipe, described temperature sensor, oxygen sensor, spectrograph is all connected with master control unit with light source.
Preferably, described sealed gas chamber is primarily of cylinder, divergent lens and condensing lens are formed, the two ends of described cylinder are respectively arranged with divergent lens and condensing lens, light source is arranged on the outside of divergent lens, the outer setting of condensing lens has end cap, described Fibre Optical Sensor is arranged on end cap, described cylinder is provided with inlet pipe and escape pipe, described inlet pipe is provided with solenoid electric valve, described air inlet pipe is connected with solenoid electric valve respectively with sample gas inlet pipe, described air inlet pipe is provided with sampling pump, described escape pipe is provided with oxygen sensor.
Preferably, described master control unit being 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 utility model has following technique effect: the utility model make use of ultraviolet DOAS difference absorption spectrum technology, the part that light intensity slowly changes with wavelength is rejected exactly in absorption spectrum, and only leave the part with wavelength Rapid Variable Design, then the concentration of inverting gas is gone by Rapid Variable Design part, such that it is able to avoid because the observed 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 utility model.
Embodiment
In order to make technical problem to be solved in the utility model, technical scheme and useful effect clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated. It is to be understood that specific embodiment described herein is only in order to explain the utility model, and it is not used in restriction the utility model.
As shown in Figure 1, a kind of UV spectrum flue gas analyzing apparatus, comprise the sealed gas chamber 1 for depositing gas and for the light source 2 of emitting parallel light in air chamber, one end of sealed gas chamber 1 is provided with the Fibre Optical Sensor 3 for receiving parallel light, Fibre Optical Sensor 3 is connected with spectrograph 4, sealed gas chamber 1 is provided with temperature sensor 5 and oxygen sensor 6, sealed gas chamber 1 is also provided with air inlet pipe 7 and sample gas inlet pipe 8, and temperature sensor 5, oxygen sensor 6, spectrograph 4 are all connected with master control unit 9 with light source 2.
Wherein, sealed gas chamber 1 is primarily of cylinder 10, divergent lens 11 and condensing lens 12 are formed, the two ends of cylinder 10 are respectively arranged with divergent lens 11 and condensing lens 12, light source 2 is arranged on the outside of divergent lens 11, the outer setting of condensing lens 12 has end cap 13, end cap 13 is fixed on cylinder and seals, Fibre Optical Sensor 3 is arranged on end cap 13, cylinder 10 is provided with inlet pipe 14 and escape pipe 15, inlet pipe 15 is provided with solenoid electric valve 16, air inlet pipe 7 is connected with solenoid electric valve 16 respectively with sample gas inlet pipe 8, air inlet pipe 7 is provided with sampling pump 17, escape pipe 15 is provided with oxygen sensor 6. being provided with man-machine interface 18 and interface board 19 on master control unit 9, temperature sensor 5, oxygen sensor 6 are all connected with interface board 19 with light source 2.
In the utility model, gas sampling unit primary responsibility gathers sample gas and air, then air chamber it is delivered to for other part Measurement and analysis, gas sampling unit is primarily of sampling pump, magnetic valve, associated pipe composition, sampling pump is responsible for gathering outside air, magnetic valve is responsible for switching the input of air and sample gas, their working order is coordinated to determine by master control unit, the gas samping pump choosing small volume, ultralow noise, wide temperature range, life-span length, good stability of sampling pump, has dropped to ultimate attainment by sampling pump to the error that gas concentration inverting brings. Same magnetic valve also adopts quality products, effectively reduces electromagnetic interference.
The Lights section is by emitting ultraviolet light to air chamber, and for the absorption spectrum measurement of gas provides prerequisite, 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 spectrum, 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, spectrograph, Fibre Optical Sensor, lens etc., it, for measurement, process spectroscopic data, realizes the communication with master control unit simultaneously, and the air chamber in analyser is the parts of independent research, its gloss, to pollutent absorption little, store gas effectiveness good; Spectrograph mainly gathers spectral signal and is converted to electrical signal, and it is responsible for being sent to optical information in real time processing unit, the quality of optical signal conversion electrical signal directly affects the measuring accuracy of gas, in conjunction with the gas absorption constructional feature of one's duty analyzer, the utility model have selected the spectrograph of high resolving power, high precision, high s/n ratio, simultaneously its volume is little, for the installation of other parts bring convenient. Fibre Optical Sensor is responsible for the conduction of optical signal, for meeting the severe of environment for use, the loss of signal is little, selects the silica fibre adopting outside special processing, adopt the support of specialized designs to fix in casing, reduce the loss that it moves and signal or optical fiber itself is brought. Lens are divided into condensing lens and divergent lens, and the scattered light that light source is sent by divergent lens is converted to parallel light, then enter air chamber, and condensing lens passes to optical fiber after the parallel light of air chamber is converted to focused light. K9 quartz lens selected by lens, and its good transmittance, can not cause big impact to light transmission.
Master 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 gathering, data processing, communication, inner loop, and data gathering comprises spectrum electrical signal, the collecting temperature signal of collection spectrograph, gathers oxygen sensor electrical signal; Data processing be process spectrograph gather spectral signal, oxygen sensor signal, temperature signal, data compensation, mainly the spectral signal received is finally inversed by gas concentration through specific software processing mode; Communication is divided into communication external and interior communication, the data being internally responsible 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 utility model, the method for measure gas concentrations is Differential UV spectroscopy absorption process (DOSA technology), it is at a kind of spectroscopic analysis methods that tested gas concentration compares 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 the concentration according to 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 Rapid Variable Design part, 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) sharply converts part with wavelength for absorption cross section, the principle of DOAS removes light intensity exactly with the slow changing unit of wavelength in absorption spectrum, only leave the part with wavelength Rapid Variable Design, then utilize Rapid Variable Design part to go inverting gas concentration.
The calculating 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 be X and light path is the light intensity after the gas to be measured of L through concentration, and σ i (λ) is i-th kind of gas absorption cross section.
I0 (λ) can be obtained by laboratory test, Ii (λ) can be obtained by spectrograph test, 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 better embodiment of the present utility model, not in order to limit the utility model, all any amendment, equivalent replacement and improvement etc. done within spirit of the present utility model and principle, all should wrap within the scope of the utility model.
Claims (4)
1. a UV spectrum flue gas analyzing apparatus, it is characterized in that: comprise the 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 parallel light, described Fibre Optical Sensor is connected with spectrograph, described sealed gas chamber is provided with temperature sensor and oxygen sensor, sealed gas chamber is also provided with air inlet pipe and sample gas inlet pipe, and described temperature sensor, oxygen sensor, spectrograph are all connected with master control unit with light source.
2. a kind of UV spectrum flue gas analyzing apparatus according to claim 1, it is characterized in that: described sealed gas chamber is primarily of cylinder, divergent lens and condensing lens are formed, the two ends of described cylinder are respectively arranged with divergent lens and condensing lens, light source is arranged on the outside of divergent lens, the outer setting of condensing lens has end cap, described Fibre Optical Sensor is arranged on end cap, described cylinder is provided with inlet pipe and escape pipe, described inlet pipe is provided with solenoid electric valve, described air inlet pipe is connected with solenoid electric valve respectively with sample gas inlet pipe, described air inlet pipe is provided with sampling pump, described escape pipe is provided with oxygen sensor.
3. a kind of UV spectrum flue gas analyzing apparatus according to claim 1, it is characterised in that: being provided with man-machine interface and interface board on described master control unit, described temperature sensor, oxygen sensor are all connected with interface board with light source.
4. a kind of UV spectrum flue gas analyzing apparatus according to claim 1, it is characterised in that: described light source is deuterium lamp light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620026496.4U CN205317662U (en) | 2016-01-12 | 2016-01-12 | UV spectrum flue gas analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620026496.4U CN205317662U (en) | 2016-01-12 | 2016-01-12 | UV spectrum flue gas analyzer |
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| CN205317662U true CN205317662U (en) | 2016-06-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424635A (en) * | 2016-01-12 | 2016-03-23 | 中绿环保科技股份有限公司 | Ultraviolet spectrum flue gas analyzer |
| CN107356545A (en) * | 2017-07-27 | 2017-11-17 | 中绿环保科技股份有限公司 | A kind of ultraviolet gas analyzer spectrum adaptive regulation method |
| CN108226069A (en) * | 2018-01-17 | 2018-06-29 | 南开大学 | A kind of sulfur dioxide detection device |
| CN109975676A (en) * | 2019-05-05 | 2019-07-05 | 国网江苏省电力有限公司 | The monitoring device and system of air insulating device |
| CN110186850A (en) * | 2019-05-22 | 2019-08-30 | 嘉兴勤慎智能技术有限公司 | A kind of circulating gas sensor with from adsorption function |
-
2016
- 2016-01-12 CN CN201620026496.4U patent/CN205317662U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424635A (en) * | 2016-01-12 | 2016-03-23 | 中绿环保科技股份有限公司 | Ultraviolet spectrum flue gas analyzer |
| CN107356545A (en) * | 2017-07-27 | 2017-11-17 | 中绿环保科技股份有限公司 | A kind of ultraviolet gas analyzer spectrum adaptive regulation method |
| CN108226069A (en) * | 2018-01-17 | 2018-06-29 | 南开大学 | A kind of sulfur dioxide detection device |
| CN109975676A (en) * | 2019-05-05 | 2019-07-05 | 国网江苏省电力有限公司 | The monitoring device and system of air insulating device |
| CN110186850A (en) * | 2019-05-22 | 2019-08-30 | 嘉兴勤慎智能技术有限公司 | A kind of circulating gas sensor with from adsorption function |
| CN110186850B (en) * | 2019-05-22 | 2021-12-28 | 大庆和洽科技有限公司 | Circulating gas sensor with self-adsorption function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A UV spectrum flue gas analyzer Effective date of registration: 20230907 Granted publication date: 20160615 Pledgee: China Everbright Bank Taiyuan branch Pledgor: SINOGREEN ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2023140000047 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |