CN2589969Y - Sulfuretted hydrogen gas online monitor - Google Patents
Sulfuretted hydrogen gas online monitor Download PDFInfo
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- CN2589969Y CN2589969Y CN 02292948 CN02292948U CN2589969Y CN 2589969 Y CN2589969 Y CN 2589969Y CN 02292948 CN02292948 CN 02292948 CN 02292948 U CN02292948 U CN 02292948U CN 2589969 Y CN2589969 Y CN 2589969Y
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Abstract
The utility model discloses a sulfuretted hydrogen gas online monitor comprising an ultraviolet light source (1), a lens (2), a testing gas pool (3), filter pieces and a photoelectric detector, and the components are respectively arranged on a light path. The utility model is characterized in that a semi-reflecting semi-transparent mirror (4) is also arranged between the testing gas pool (3) and the light filter pieces. Light reflecting and transmitting paths of the semi-reflecting semi-transparent mirror (4) are respectively provided with the light filter pieces (7, 5) and the photoelectric detector. The reflectivity and the transmissivity of the semi-reflecting semi-transparent mirror (4) are all 50 percents. The transmitting wavelength of the light filter piece (5) is 228 nanometers. The transmitting wavelength of the light filter piece (7) is 228 nanometers. The photoelectric detector is composed of a photomultiplier tube (6) and a photodiode detector (8). The utility model can increases reliability of operation and achieves total online real-time monitoring. Objective situations of testing objects can be veritably obtained by test results, which is favorable for online tests on site and convenient for maintenance. The utility model can be widely used for the continuous online monitoring of sulfuretted hydrogen gas.
Description
Technical field the utility model relates to a kind of gas measurement device, especially the hydrogen sulfide gas on-Line Monitor Device.
Background technology is in the process of some Chemical Manufacture and crystal growth, can produce harmful gas sulfuretted hydrogen, for this reason, people come hydrogen sulfide gas is carried out the continuous on-line monitoring often according to the absorption characteristic of hydrogen sulfide gas to light, and (Atomic Energy Press publishes as " ultraviolet-visible light spectrophotometric method ", Chen Guozhens etc. are write, nineteen eighty-three first published, the first volume, the 176th～183 page) a kind of dual-wavelength spectrophotomer of introducing in the book.It by the ultraviolet source that covers the hydrogen sulfide gas wave band, place lens on this light source light path, hydrogen sulfide gas pond, the optical filter and the photodetector that drag rotation by motor constitute.During detection, the ultraviolet light that light source sends becomes the ultraviolet directional light behind lens, and this light passes the hydrogen sulfide gas pond and optical filter arrives photodetector.But, this photometer exists many weak points, at first, photodetector is detected successively to be benchmark, reference and measuring-signal, also be that timesharing is measured to measured object promptly, this is the concentration change that can not reflect the hydrogen sulfide gas that it includes truly for the fast gas of flow velocity; Secondly, placing the optical filter on the rotating disk is by the driven by motor rotation, positions by optocoupler, in the industry spot environment, very easily produces error; Once more, Electric Machine Control in the complete machine and acquisition time circuit complexity, manufacturing cost height, easy break-down.
The summary of the invention the technical problems to be solved in the utility model is for overcoming weak point of the prior art, and a kind of simple in structure, hydrogen sulfide gas on-Line Monitor Device that monitoring accuracy is high is provided.
The technical scheme that is adopted comprises ultraviolet source, lens, gas cell to be measured, optical filter and the photodetector that is equipped with successively on the light path, also be equipped with half-reflecting half mirror between particularly said gas cell to be measured and optical filter, be equipped with optical filter and photodetector on the reflection of said half-reflecting half mirror and the transmitted light path respectively.
As the further improvement of technical scheme, the reflectivity and the transmissivity of described half-reflecting half mirror are 50%; The printing opacity wavelength of described optical filter is 228 nanometers, and the printing opacity wavelength of another optical filter is 361 nanometers; Described photodetector is photomultiplier and photodiode detector.
Beneficial effect with respect to prior art is, one, owing to use half-reflecting half mirror to replace motor and rotating disk, both changed for quiet, eliminated the factors of instability, improved reliability of operation, again can be have directly obtained reference signal by the reflectivity or the transmissivity of half-reflecting half mirror, saved the collection of reference signal and, promoted the real-time of monitoring the comparison of itself and measuring-signal; They are two years old, adopt two photodetectors that dual wavelength is measured simultaneously, realized online monitoring fully in real time, make measurement result reflect the objective circumstances of measured object truly, improved the precision of measuring, and in two photodetectors one only is low-cost high-sensitive photodiode, and another is former photomultiplier, has improved the ratio of performance to price widely; Its three, simplified the formation of machinery and circuit, reduced the cost of making and using, be beneficial to on-the-spot online detection and be convenient to maintenance.
Description of drawings is described in further detail optimal way of the present utility model below in conjunction with accompanying drawing.
Fig. 1 is a kind of basic structure synoptic diagram of the present utility model.
Embodiment is referring to Fig. 1, place the focus place of lens 2 as the cadmium lamp of ultraviolet source 1, be equipped with gas cell 3 to be measured and half-reflecting half mirror 4 successively on the light path by lens 2 collimations, wherein, gas cell 3 to be measured is connected with monitored place, the reflectivity and the transmissivity of half-reflecting half mirror 4 are 50%, are equipped with the printing opacity wavelength on the reflected light path of half-reflecting half mirror 4 and are on the optical filter 7 of 361 nanometers and photodiode detector 8, the transmitted light path to be equipped with optical filter 5 and the photomultiplier 6 that the printing opacity wavelength is 228 nanometers.
During use, send the ultraviolet light that wavelength coverage is 10～380 nanometers by cadmium lamp, this light becomes directional light behind lens 2, and by the gas cell to be measured 3 that is full of hydrogen sulfide gas directive half-reflecting half mirror 4, light is behind process half-reflecting half mirror 4,50% light intensity sees through the optical filter 5 go again through 228 nanometers and is received by photomultiplier 6, is received by photodiode detector 8 through the optical filter 7 of 361 nanometers after also having 50% light intensity to be reflected.Because hydrogen sulfide gas has significant absorption peak in 228 nanometers, almost do not absorb in 361 nanometers, so can utilize these two wave bands respectively as measuring and reference channel, to constitute above-mentioned difference measurement system, handled by follow-up corresponding function parts respectively by the two paths of signals that two photodetectors receive.
Claims (4)
1, a kind of hydrogen sulfide gas on-Line Monitor Device, comprise the ultraviolet source (1), lens (2), gas cell to be measured (3), optical filter and the photodetector that are equipped with successively on the light path, it is characterized in that also being equipped with between said gas cell to be measured (3) and optical filter half-reflecting half mirror (4), be equipped with optical filter (7,5) and photodetector on the reflection of said half-reflecting half mirror (4) and the transmitted light path respectively.
2, device according to claim 1, wherein the reflectivity and the transmissivity of half-reflecting half mirror (4) are 50%.
3, device according to claim 1, wherein the printing opacity wavelength of optical filter (5) is 228 nanometers, the printing opacity wavelength of optical filter (7) is 361 nanometers.
4, device according to claim 1, wherein photodetector is photomultiplier (6) and photodiode detector (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02292948 CN2589969Y (en) | 2002-12-20 | 2002-12-20 | Sulfuretted hydrogen gas online monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02292948 CN2589969Y (en) | 2002-12-20 | 2002-12-20 | Sulfuretted hydrogen gas online monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2589969Y true CN2589969Y (en) | 2003-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02292948 Expired - Fee Related CN2589969Y (en) | 2002-12-20 | 2002-12-20 | Sulfuretted hydrogen gas online monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2589969Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156103A (en) * | 2011-03-08 | 2011-08-17 | 重庆烟草工业有限责任公司 | Determination method for indirectly measuring sulfureted hydrogen in mainstream smoke gas phase of cigarette by copper color method |
| CN101782514B (en) * | 2009-11-05 | 2011-09-28 | 胜利油田胜利工程设计咨询有限责任公司 | Online monitoring device for concentration of hydrogen sulfide by laser |
| CN102539365A (en) * | 2011-12-28 | 2012-07-04 | 昆明理工大学 | Motor vehicle tail gas detection device with nitrogen molecular laser and using method thereof |
| CN102621063A (en) * | 2012-03-05 | 2012-08-01 | 哈尔滨工业大学 | Small-size oxygen measuring device based on porous material gas cell |
| CN108051388A (en) * | 2018-01-16 | 2018-05-18 | 武汉敢为科技有限公司 | A kind of H2S gas ultraviolet spectra detection devices and its method |
-
2002
- 2002-12-20 CN CN 02292948 patent/CN2589969Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782514B (en) * | 2009-11-05 | 2011-09-28 | 胜利油田胜利工程设计咨询有限责任公司 | Online monitoring device for concentration of hydrogen sulfide by laser |
| CN102156103A (en) * | 2011-03-08 | 2011-08-17 | 重庆烟草工业有限责任公司 | Determination method for indirectly measuring sulfureted hydrogen in mainstream smoke gas phase of cigarette by copper color method |
| CN102156103B (en) * | 2011-03-08 | 2013-03-06 | 重庆烟草工业有限责任公司 | Determination method for indirectly measuring sulfureted hydrogen in mainstream smoke gas phase of cigarette by copper color method |
| CN102539365A (en) * | 2011-12-28 | 2012-07-04 | 昆明理工大学 | Motor vehicle tail gas detection device with nitrogen molecular laser and using method thereof |
| CN102621063A (en) * | 2012-03-05 | 2012-08-01 | 哈尔滨工业大学 | Small-size oxygen measuring device based on porous material gas cell |
| CN102621063B (en) * | 2012-03-05 | 2013-11-13 | 哈尔滨工业大学 | Small-size oxygen measuring device based on porous material gas cell |
| CN108051388A (en) * | 2018-01-16 | 2018-05-18 | 武汉敢为科技有限公司 | A kind of H2S gas ultraviolet spectra detection devices and its method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |