CN111693478A - Multi-component flue gas ultraviolet analyzer and use method thereof - Google Patents
Multi-component flue gas ultraviolet analyzer and use method thereof Download PDFInfo
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- CN111693478A CN111693478A CN202010689954.3A CN202010689954A CN111693478A CN 111693478 A CN111693478 A CN 111693478A CN 202010689954 A CN202010689954 A CN 202010689954A CN 111693478 A CN111693478 A CN 111693478A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 239000003546 flue gas Substances 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 76
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 239000013307 optical fiber Substances 0.000 claims description 28
- 238000009826 distribution Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 238000000862 absorption spectrum Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 208000032370 Secondary transmission Diseases 0.000 claims description 3
- 238000001658 differential optical absorption spectrophotometry Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010183 spectrum analysis Methods 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 239000000779 smoke Substances 0.000 abstract description 8
- 230000003139 buffering effect Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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Abstract
The invention relates to the technical field of gas detection equipment, in particular to a multi-component smoke ultraviolet analyzer and a using method thereof, wherein the multi-component smoke ultraviolet analyzer comprises a case, a rear-end inner cavity of the case is arranged as a detection inner cavity, a front plate is fixedly arranged on the front end surface of the case, a power supply is arranged on the rear side of the inner cavity of the detection inner cavity, and a lamp box, a conical light gathering cover, a gas chamber and a spectrometer are sequentially arranged in the front-end inner cavity of the detection inner cavity from left to right: the invention can quickly, accurately and reliably measure various industrial process gases, environment-friendly emission flue gas and other process gases in a measurement mode without sampling pretreatment, and provides an optimal solution for online monitoring of the gases in various industries; through setting up even air inlet block, utilize the reposition of redundant personnel to admit air to reduce the gas column external diameter of air current, set up the buffering inner chamber simultaneously, realize that inside atmospheric pressure is balanced, reach the purpose of unified giving vent to anger, make the contact of gas and light realize abundant even absorption, improved the efficiency and the degree of accuracy that detect greatly.
Description
Technical Field
The invention relates to the technical field of gas detection equipment, in particular to a multi-component smoke ultraviolet analyzer and a using method thereof.
Background
The ultraviolet absorption spectrum detection technology is based on the fact that the interaction of ultraviolet light and molecules is absorbed by the molecules to cause the change of light energy, different molecules have characteristic absorption spectra due to the difference of transition energy and probability of electronic energy levels in different molecules, and the ultraviolet absorption spectra are quantitative description of the absorption capacity of the molecules in an ultraviolet band. The ultraviolet absorption spectrum of a unit molecule is generally described by an absorption cross section.
The current flue gas ultraviolet analysis appearance is because the air current transport speed of being surveyed gaseous is indefinite, and the contact that leads to measuring time measuring and light is not enough to lead to the testing result error great, the accuracy is not enough, and the circulation internal diameter of air current is great simultaneously, further leads to the area of contact between light and the air current to mismatch, and then causes to absorb inadequately.
Therefore, the multi-component smoke ultraviolet analyzer and the using method thereof are provided, and the problem of insufficient detection precision is solved.
Disclosure of Invention
The invention aims to provide a multi-component smoke ultraviolet analyzer and a using method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a multi-component smoke ultraviolet analyzer comprises a case, wherein a rear end inner cavity of the case is arranged as a detection inner cavity, a front plate is fixedly arranged on the front end face of the case, a power supply is arranged on the rear side of the inner cavity of the detection inner cavity, a light box, a conical light gathering cover, a gas chamber and a spectrometer are sequentially arranged in the front end inner cavity of the detection inner cavity from left to right, a light source is arranged on the right side of the light box, the conical light gathering cover is transversely installed on the right side of the light box in an inserted mode, the light source is installed in the inner cavity of the conical light gathering cover, a first optical fiber is transversely installed in the inner cavity of the conical light gathering cover, one end of the first optical fiber is located in the inner cavity of the conical light gathering cover, the left side of the inner cavity of the gas chamber, the upper end of the inner cavity of the gas chamber, the other end of the second optical fiber is connected with the spectrometer, the upper end of the uniform air inlet block is provided with an air inlet interface, the upper end inner cavity of the uniform air inlet block is provided with a bilaterally symmetrical inclined split air passage, the middle inner cavity of the uniform air inlet block is arranged as a buffer inner cavity, the lower end of the uniform air inlet block is fixedly welded with an extension bracket, the lower end of the split air passage is provided with an air inlet split air passage which is transversely and linearly distributed, the lower end of the air inlet split air passage is communicated with the buffer inner cavity, the lower end of the buffer inner cavity is provided with a uniformly distributed split air passage which is linearly distributed, the lower end inner cavity of the uniformly distributed split air passage is slidably inserted with an air duct, the lower end of the air duct is inserted in the inner cavity of the extension bracket, the outer wall of the middle section of the air duct is fixedly welded with a, and a spring is arranged between the limiting plate and the bottom plate of the extension bracket.
Preferably, a control panel is arranged in the middle of the front end face of the front plate, the control panel is electrically connected with the output end of the spectrometer, and the rear end of the control panel is connected with a power supply.
Preferably, one end of the first optical fiber is provided with an input terminal, the other end of the first optical fiber is provided with an output terminal, the input terminal is opposite to the light source, the input terminal receives light of the light source, and the output terminal is located in the inner cavity of the gas chamber and transversely outputs the light.
Preferably, the lower end of the air inlet air distributing passage and the upper end of the uniformly distributed air distributing passage are distributed at intervals in a staggered manner, and the inner diameter of the air inlet air distributing passage is the same as that of the uniformly distributed air distributing passage.
Preferably, the fixed welding of the middle end outer wall of the even air inlet block has a circular ring-shaped ear seat, the upper end outer wall of the ear seat and the air chamber is fixedly connected through screws distributed in a circumferential array, and a sealing gasket is fixedly bonded between the lower end of the ear seat and the outer wall of the even air inlet block.
Preferably, the spring is sleeved on the outer wall of the lower end of the air guide pipe in a sliding mode, the upper end of the spring abuts against the lower end face of the limiting plate, and the lower end of the spring abuts against the upper end face of the extending support bottom plate.
Preferably, the bottom plate of the extension bracket is provided with through holes which are linearly distributed and are in one-to-one symmetry with the air ducts, the lower ends of the air ducts are inserted into the through holes, and the lateral through holes are positioned in inner cavities of the through holes.
A use method of a multi-component smoke ultraviolet analyzer comprises the following steps:
the method comprises the following steps: the light source is used for exciting ultraviolet light through the lamp box and collecting the light through the conical light-collecting cover;
step two: the optical fiber conduction is realized, and the collected ultraviolet rays are transversely transmitted to the inside of the gas chamber in parallel through the first optical fiber;
step three: gas absorption, namely uniformly and slowly introducing the gas to be detected by using the uniform gas inlet block, and fully contacting the gas to be detected with ultraviolet light to ensure that the light is fully absorbed by the gas;
step four: secondary transmission, namely collecting and transmitting the light absorbed in the step three by using a second optical fiber, and outputting the light to a spectrometer;
step five: and (3) spectral analysis, wherein the light is split by a grating in the spectrometer, the split optical signal is converted into an electric signal by the array sensor, the continuous absorption spectrum information of the gas is obtained, and the concentration of the gas to be detected is obtained by a DOAS algorithm.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can quickly, accurately and reliably measure various industrial process gases, environment-friendly emission flue gas and other process gases in a measurement mode without sampling pretreatment, and provides an optimal solution for online monitoring of the gases in various industries;
2. the uniform air inlet block is arranged, the air is introduced in a shunting manner, so that the outer diameter of an air column of air flow is reduced, the buffer inner cavity is arranged, the internal air pressure is balanced, the aim of uniform air outlet is fulfilled, the air is fully and uniformly absorbed when being in contact with light, and the detection efficiency and accuracy are greatly improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic view of a homogeneous air inlet block configuration of the present invention;
FIG. 4 is a diagram of a system for using the present invention;
FIG. 5 is a flow chart of the detection system of the present invention.
In the figure: 1. a chassis; 2. detecting an inner cavity; 3. a front plate; 4. a power source; 5. a light box; 6. a conical snoot; 7. a light source; 8. a first optical fiber; 9. a gas chamber; 10. a spectrometer; 11. a second optical fiber; 12. an output terminal; 13. an air outlet; 14. a control panel; 15. an input terminal; 16. uniformly feeding air; 17. an air inlet interface; 18. shunting an air passage; 19. an air inlet branch air passage; 20. an ear mount; 21. a sealing gasket; 22. an extension bracket; 23. uniformly distributing air distributing passages; 24. a buffer cavity; 25. an air duct; 26. a through hole; 27. a spring; 28. a limiting plate; 29. a sealing plug; 30. and a lateral through hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, the present invention provides a technical solution:
the utility model provides a multicomponent flue gas ultraviolet analyzer, includes quick-witted case 1, and the rear end inner chamber of quick-witted case 1 sets up to detect inner chamber 2, and the preceding terminal surface fixed mounting of quick-witted case 1 has front bezel 3, is provided with control panel 14 in the middle of the preceding terminal surface of front bezel 3, and control panel 14 electric connection spectrometer 10's output, and control panel 14's rear end connects power 4, utilizes control panel 14 control to detect the equipment in the inner chamber 2, shows the concentration of the gas of being surveyed simultaneously.
The inner cavity rear side that detects inner chamber 2 is provided with power 4, and the front end inner chamber that detects inner chamber 2 has from left to right set gradually lamp house 5, toper snoot 6, gas chamber 9 and spectrum appearance 10, and the right side of lamp house 5 is provided with light source 7, utilizes power 4 to provide electric power for each check out test set, makes light source 7 arouse ultraviolet ray through lamp house 5.
The right side of the lamp box 5 is transversely inserted and provided with a conical light-gathering cover 6, the light source 7 is arranged in the inner cavity of the conical light-gathering cover 6, the inner cavity of the right side of the conical light-gathering cover 6 is transversely provided with a first optical fiber 8, and the conical light-gathering cover 6 is utilized to collect ultraviolet light.
One end of the first optical fiber 8 is located in the inner cavity of the conical light-gathering cover 6, the left side of the inner cavity of the gas chamber 9 extending from the other end of the first optical fiber 8 is provided with an input terminal 15, the other end of the first optical fiber 8 is provided with an output terminal 12, the input terminal 15 is right opposite to the light source 7, the input terminal 15 receives light of the light source 7, the output terminal 12 is located in the inner cavity of the gas chamber 9 and transversely outputs the light, and the first optical fiber 8 is used for transporting the light by utilizing the cooperation of the output terminal 12 and the input terminal 15.
The sealed grafting in inner chamber upper end of gas chamber 9 has even piece 16 of admitting air, the fixed welding of the middle end outer wall of even piece 16 of admitting air has annular ear seat 20, screw fixed connection through circumference array distribution between the upper end outer wall of ear seat 20 and gas chamber 9, and be fixed with seal ring 21 between the lower extreme of ear seat 20 and the outer wall of even piece 16 of admitting air, utilize the cooperation of ear seat 20 and screw, realize the fixed grafting installation of even piece 16 of admitting air, utilize seal ring 21 to realize the sealed of hookup location.
The upper end of the even air inlet block 16 is provided with an air inlet interface 17, the inner cavity of the upper end of the even air inlet block 16 is provided with a left-right symmetrical inclined flow dividing air passage 18, the lower end of the flow dividing air passage 18 is provided with an air inlet flow dividing air passage 19 which is transversely and linearly distributed, and the air inlet flow is divided into a plurality of small air columns for air inlet by the aid of cooperation of the flow dividing air passage 18 and the air inlet flow dividing air passage 19, so that the purpose of even air inlet is achieved.
The middle inner chamber of even air inlet block 16 sets up to buffering inner chamber 24, the lower extreme intercommunication buffering inner chamber 24 of branch air flue 19 admits air, the lower extreme of buffering inner chamber 24 is provided with linear distribution's equipartition and divides air flue 23, admit air and divide interval staggered distribution between the upper end of air flue 23 of air flue 19 and equipartition, and the internal diameter that admits air and divide air flue 23 is the same with the internal diameter that the equipartition divides air flue 23, utilize buffering inner chamber 24 to realize the buffering of the air current that admits air, thereby avoid the direct impact of air current, utilize the lower extreme that admits air and the equipartition that the air divides air flue 19 to divide the staggered distribution between the air flue 23.
The lower extreme fixed welding of even air inlet piece 16 has extension support 22, and the lower extreme inner chamber of equipartition gas-distributing channel 23 slides and pegs graft and have air duct 25, and the lower extreme of air duct 25 pegs graft in extension support 22's inner chamber, is provided with the through hole 26 with the linear distribution of air duct 25 one-to-one on extension support 22's the bottom plate, and the lower extreme of air duct 25 pegs graft in through hole 26, utilizes the cooperation of equipartition gas-distributing channel 23 and through hole 26, realizes the slip grafting installation of air duct 25.
Fixed welding of the interlude outer wall of air duct 25 has a pair of limiting plate 28 of bilateral symmetry, be provided with spring 27 between limiting plate 28 and the bottom plate of extension support 22, spring 27 slides and cup joints the lower extreme outer wall at air duct 25, and spring 27's upper end supports the lower terminal surface at limiting plate 28, spring 27's lower extreme supports the up end at extension support 22 bottom plate, utilize limiting plate 28 to prescribe a limit to the position that air duct 25 rises, utilize spring 27 to realize that the extrusion of air duct 25 descends, utilize spring 27's restoring force simultaneously, realize that linear distribution's air duct 25 is unified to be closed.
The sealing plug 29 is inserted into the lower end inner cavity of the air duct 25 in a sealing mode, a pair of symmetrical lateral through holes 30 are transversely formed in the outer walls of the left side and the right side of the lower end of the air duct 25, the lateral through holes 30 are located in the inner cavities of the through holes 26, the lower end of the air duct 25 is sealed through the sealing plug 29, lateral air outlet of the air duct 25 is achieved through the lateral through holes 30, mutual impact of air flow between adjacent air ducts 25 is broken up, the air flow transportation speed is reduced, and meanwhile, full absorption contact between air and light is achieved.
The lower extreme of gas chamber 9 is provided with conical gas outlet 13, and the right side of gas chamber 9 is provided with second optic fibre 11, and spectrum appearance 10 is connected to the other end of second optic fibre 11, utilizes second optic fibre 11 to realize being absorbed the conduction of back light, utilizes spectrum appearance 10 to realize carrying out analysis and calculation to the light of absorption to reacing the gaseous gas concentration of being surveyed.
A use method of a multi-component smoke ultraviolet analyzer is characterized by comprising the following steps: the using method comprises the following steps:
the method comprises the following steps: the light source is used for exciting ultraviolet light through the lamp box 5 and converging the light through the conical light-gathering cover 6;
step two: the optical fiber conduction is realized, and the collected ultraviolet rays are transversely transmitted to the inside of the gas chamber 9 in parallel through the first optical fiber 8;
step three: gas absorption, namely uniformly and slowly introducing the gas to be detected by using the uniform gas inlet block 16, and fully contacting the gas to be detected with ultraviolet rays to ensure that the rays are fully absorbed by the gas;
step four: secondary transmission, namely collecting and transmitting the light absorbed in the step three by using a second optical fiber 11, and outputting the light into a spectrometer 10;
step five: and (3) performing spectrum analysis, namely performing grating light splitting inside the spectrometer 10, converting the split optical signals into electric signals by the array sensor to obtain continuous absorption spectrum information of the gas, and obtaining the concentration of the measured gas by a DOAS algorithm.
The working principle is as follows: firstly, ultraviolet light is excited by the light source 7 through the lamp box 5, the ultraviolet light is collected by the conical light-gathering cover 6, and the light is transported by the first optical fiber 8 through the matching of the output terminal 12 and the input terminal 15, so that the ultraviolet light transversely irradiates in the gas chamber 9.
Utilize the cooperation of ear seat 20 and screw, realize the fixed grafting installation of even air intake piece 16, utilize seal ring 21 to realize the sealed of hookup location, utilize reposition of redundant personnel air flue 18 and the cooperation of branch air flue 19 that admits air, the realization is intake air flow and is decomposed into a plurality of little gas columns, thereby realize the even purpose of admitting air, utilize the lower extreme and the equipartition of admitting air branch air flue 19 to divide the dislocation distribution between the air flue 23, thereby reduce the direct impact of air current, slow down the transport speed of air current, utilize the equipartition to divide air flue 23 and through hole 26's cooperation, realize the installation of pegging graft of the slip of air duct 25.
Utilize limiting plate 28 to inject the position that the air duct 25 rose, utilize spring 27 to realize that the extrusion of air duct 25 descends, utilize spring 27's restoring force simultaneously, realize that linear distribution's air duct 25 is unified to be closed, utilize sealing plug 29 to realize the closure of air duct 25 lower extreme, utilize side direction through-hole 30 to realize that the side direction of air duct 25 is given vent to anger, the mutual impact of air current is broken up between the adjacent air duct 25 of realization, thereby reduce the transportation speed of air current, realize the abundant absorption contact between gas and the light simultaneously, the efficiency and the degree of accuracy of detection have been improved greatly.
Utilize second optic fibre 11 to realize being absorbed the conduction of back light, utilize spectrometer 10 to realize carrying out analysis and calculation to absorbed light to obtain the gas concentration of being surveyed gas, through the measuring method that need not sample preliminary treatment, can carry out quick, accurate and reliable measurement to process gases such as all kinds of industrial process gases, environmental protection emission flue gas, provide the best solution for gaseous on-line monitoring of each trade.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a multicomponent flue gas ultraviolet analyzer, includes quick-witted case (1), its characterized in that: the rear end inner cavity of the case (1) is set as a detection inner cavity (2), a front end face of the case (1) is fixedly provided with a front plate (3), the inner cavity rear side of the detection inner cavity (2) is provided with a power supply (4), the front end inner cavity of the detection inner cavity (2) is sequentially provided with a lamp box (5), a conical light gathering cover (6), a gas chamber (9) and a spectrometer (10) from left to right, the right side of the lamp box (5) is provided with a light source (7), the right side of the lamp box (5) is transversely inserted with the conical light gathering cover (6), the light source (7) is arranged in the inner cavity of the conical light gathering cover (6), the right side inner cavity of the conical light gathering cover (6) is transversely provided with a first optical fiber (8), one end of the first optical fiber (8) is positioned in the inner cavity of the conical light gathering cover (6), and the, the upper end of the inner cavity of the gas chamber (9) is hermetically inserted with an even gas inlet block (16), the lower end of the gas chamber (9) is provided with a conical gas outlet (13), the right side of the gas chamber (9) is provided with a second optical fiber (11), the other end of the second optical fiber (11) is connected with the spectrometer (10), the upper end of the even gas inlet block (16) is provided with a gas inlet interface (17), the inner cavity at the upper end of the even gas inlet block (16) is provided with a bilaterally symmetrical inclined split gas passage (18), the middle inner cavity of the even gas inlet block (16) is arranged as a buffer inner cavity (24), the lower end of the even gas inlet block (16) is fixedly welded with an extension bracket (22), the lower end of the split gas passage (18) is provided with a gas inlet split gas passage (19) which is transversely and linearly distributed, the lower end of the gas inlet split gas passage (19) is communicated with the buffer inner cavity (24), the lower extreme inner chamber of equipartition branch air flue (23) slides and pegs graft and have air duct (25), peg graft at the inner chamber that extends support (22) the lower extreme of air duct (25), and the fixed welding of interlude outer wall of air duct (25) has a pair of limiting plate (28) of bilateral symmetry, and the sealed grafting of lower extreme inner chamber of air duct (25) has sealing plug (29), and a pair of side direction through-hole (30) of mutual symmetry are transversely seted up to the lower extreme left and right sides outer wall of air duct (25), be provided with spring (27) between limiting plate (28) and the bottom plate of extending support (22).
2. The multi-component flue gas ultraviolet analyzer of claim 1, characterized in that: the middle of the front end face of the front plate (3) is provided with a control panel (14), the control panel (14) is electrically connected with the output end of the spectrometer (10), and the rear end of the control panel (14) is connected with the power supply (4).
3. The multi-component flue gas ultraviolet analyzer of claim 1, characterized in that: one end of the first optical fiber (8) is provided with an input terminal (15), the other end of the first optical fiber (8) is provided with an output terminal (12), the input terminal (15) is opposite to the light source (7), the input terminal (15) receives light of the light source (7), and the output terminal (12) is located in an inner cavity of the gas chamber (9) and transversely outputs the light.
4. The multi-component flue gas ultraviolet analyzer of claim 1, characterized in that: the lower end of the air inlet air distributing passage (19) and the upper end of the uniformly distributed air distributing passage (23) are distributed at intervals in a staggered mode, and the inner diameter of the air inlet air distributing passage (19) is the same as that of the uniformly distributed air distributing passage (23).
5. The multi-component flue gas ultraviolet analyzer of claim 1, characterized in that: the fixed welding of the middle end outer wall of even piece (16) of admitting air has annular ear seat (20), through the screw fixed connection of circumference array distribution between the upper end outer wall of ear seat (20) and gas chamber (9), and be fixed with seal ring (21) between the lower extreme of ear seat (20) and the outer wall of even piece (16) of admitting air.
6. The multi-component flue gas ultraviolet analyzer of claim 1, characterized in that: the spring (27) is sleeved on the outer wall of the lower end of the air duct (25) in a sliding mode, the upper end of the spring (27) abuts against the lower end face of the limiting plate (28), and the lower end of the spring (27) abuts against the upper end face of the bottom plate of the extension support (22).
7. The multi-component flue gas ultraviolet analyzer of claim 1, characterized in that: the bottom plate of the extension bracket (22) is provided with through holes (26) which are in one-to-one symmetry with the air ducts (25) and are in linear distribution, the lower ends of the air ducts (25) are inserted into the through holes (26), and the lateral through holes (30) are positioned in inner cavities of the through holes (26).
8. The use method of the multi-component flue gas ultraviolet analyzer according to claim 1, characterized in that: the using method comprises the following steps:
the method comprises the following steps: the emission light source excites ultraviolet light through the lamp box (5), and the light is converged through the conical light-gathering cover (6);
step two: the optical fiber conduction is realized, and the collected ultraviolet rays are transversely transmitted to the inside of the gas chamber (9) in parallel through the first optical fiber (8);
step three: gas absorption, namely uniformly and slowly entering the gas to be detected by utilizing a uniform gas inlet block (16), and fully contacting the gas to be detected with ultraviolet rays to ensure that the rays are fully absorbed by the gas;
step four: secondary transmission, namely collecting and transmitting the light absorbed in the step three by using a second optical fiber (11), and outputting the light into a spectrometer (10);
step five: and (3) spectral analysis, wherein light is split by a grating in the spectrometer (10), the split optical signal is converted into an electric signal by the array sensor to obtain the continuous absorption spectrum information of the gas, and the concentration of the gas to be detected is obtained by a DOAS algorithm.
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| CN202010689954.3A CN111693478A (en) | 2020-07-17 | 2020-07-17 | Multi-component flue gas ultraviolet analyzer and use method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112444498A (en) * | 2020-11-17 | 2021-03-05 | 安徽蓝之青环保科技有限公司 | Ultraviolet flue gas analyzer and analysis method thereof |
| CN116242795A (en) * | 2023-05-12 | 2023-06-09 | 山东益来环保科技有限公司 | Ultraviolet smoke analyzer and application method thereof |
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| CN116242795A (en) * | 2023-05-12 | 2023-06-09 | 山东益来环保科技有限公司 | Ultraviolet smoke analyzer and application method thereof |
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