CN109211836A - Plug-in type laser gas analysis device and method - Google Patents
Plug-in type laser gas analysis device and method Download PDFInfo
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- CN109211836A CN109211836A CN201710554468.9A CN201710554468A CN109211836A CN 109211836 A CN109211836 A CN 109211836A CN 201710554468 A CN201710554468 A CN 201710554468A CN 109211836 A CN109211836 A CN 109211836A
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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
- G01N21/17—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
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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Abstract
The present invention provides a kind of plug-in type laser gas analysis device, including laser transmitting-receiving and thermocouple signal processing unit, protecting pipe, laser channeling, verification standard gas intake line, blowback pipeline, ceramic filter, mounting flange, laser mirror, gas detection cell, laser channeling through-hole, thermocouple.The plug-in type laser gas analysis device is inserted by flue or stove outer wall, detection gas constituent concentration and temperature；The ceramic filter is installed on the insertion end of device for filtering tested gas；Laser mirror is arranged in insertion end gas detection cell bottom；The laser transmitting-receiving and thermocouple signal processing unit include laser transmitting-receiving probe and Digital Signal Analysis and Processing module；Blowback pipeline and verification calibration pipeline are also respectively set in the insertion tube of device.The present invention is by increasing laser mirror in probe bottom, by laser reflection, it realizes and the transmitting probe of laser and receiving transducer is placed on side, filter is set in the insertion end gas detection cell of probe simultaneously, filter the dust in gas, guarantee the finish of mirror surface, the measurement light of effective reflectance-transmittance detected gas.The present invention has the advantages that detection accuracy is high, easy for installation, long service life.
Description
Technical field
The present invention relates to the dresses of gas composition analysis under the hot environments such as gas analysis field more particularly to burner hearth, flue
It sets and method.
Background technique
Oxygen Measuring Instrument is generallyd use in the monitoring of industrial gasses constituent concentration.Although Oxygen Measuring Instrument
The influence of not examined gas temperature can detecte the oxygen content in various temperature gas by using different diversion pipes, spirit
It is living to apply on many industrial on-line checkings.But the disadvantage is that the reaction time it is slow；Structure is complicated, is easy to influence detection accuracy；
Porous platinum electrode is easy to be failed by the sulphur in gas, the corrosion of arsenic etc. and the blocking of fine dusts；It uses and adds in probe
The heating of hot device, General Life are not grown, in addition, Oxygen Measuring Instrument can only one ingredient of oxygen in detection gas.Occur now
A kind of laser gas analysis technology, such as patent 201210598586.7, this analyzer can effectively quick detection gas at
Divide concentration, not only can detecte oxygen ingredient in gas, but also can as needed, the other compositions such as detection carbon monoxide,
The long service life of laser gas analysis technology.However laser gas analysis technology is needed by the two of the flue of gas or stove
Laser beam emitting device and receiving device are installed in sidetracking hole respectively, to guarantee that laser is reliably received and dispatched, it is desirable that laser transmitting-receiving probe is tight
Lattice are in a straight line, therefore the structure of analyzer CN201210598586 and installation are complicated cumbersome, and required attachment is more,
During stove operates normally, it is difficult to which drill installation on furnace body or flue, it is necessary to when waiting stove halt production maintenance, could implement.
Summary of the invention
For the deficiency of zirconia oxygen analyzer and laser gas analysis technology, both the present invention combines advantage proposes one kind
Measurement accuracy height, long service life, plug-in type laser gas analysis device easy for installation and its detection and analysis gas componant are dense
The method of degree and temperature.
Technical scheme is as follows:
Plug-in type laser gas analysis device of the present invention includes: laser transmitting-receiving and thermocouple signal processing unit, shield
Casing, laser channeling, verification standard gas pipeline, blowback pipeline, ceramic filter, mounting flange, laser mirror, laser channeling are logical
Hole, gas detection cell, thermocouple, it is characterised in that by increasing laser mirror in probe bottom, reflective mirror can be metal
Platinized platinum, quartz glass or other high temperature resistant reflectorized materials, reflecting mirror realize laser reflection by the transmitting probe of laser and reception
Probe placement concentrates in laser transmitting-receiving and thermocouple signal processing unit, in addition thermocouple signal is also introduced into laser in side
Transmitting-receiving and thermocouple signal processing unit, while filter is set in the insertion end of probe, the dust in gas is filtered, so that inspection
It is clean to survey room, guarantees the finish of mirror surface, the laser of effective reflectance-transmittance detected gas.
Ceramic filter is arranged in the insertion end of the detection and analysis device, and ceramic filter is fixed on detection and analysis by flange
It on device outer tube, is sealed between ceramic filter, flange, outer tube of popping one's head in, guarantees that no dust from gas penetrates into；Gas passes through pottery
Porcelain filter penetrates into and passes through the cavity of probe insertion end sensing chamber.Laser built in laser transmitting-receiving and thermocouple signal processing unit
Transmitter and receiver, vertical with laser channeling, laser is emitted by transmitter, by laser channeling, into insertion end sensing chamber,
The reflecting mirror of sensing chamber bottom returns to laser transmitting-receiving and thermocouple signal by laser channeling to the laser reflection for entering sensing chamber
The laser of processing unit receives on probe, and laser transmitting-receiving and thermocouple signal processing unit are by received reflection gas composition concentration
The laser signal of information is converted to electric signal, send the Digital Signal Analysis and Processing mould to laser transmitting-receiving and thermocouple signal processing unit
Block calculates gas composition concentration to electric signal analysis is received.
Plug-in type laser gas analysis device of the present invention detects flue-gas temperature in insertion end sensing chamber setting thermocouple,
Thermocouple detects temperature signal and introduces laser transmitting-receiving and the progress data processing of thermocouple signal processing unit.
Standard gas intake line and blowback pipeline, the public pipeline of two pipelines is arranged in plug-in type laser gas analysis device
Channel.The accuracy verification calibration that standard gas intake line is used to detect detection device；Blowback pipeline is used in dust from gas
When blocking ceramic filter, blowback sensing chamber blows the dust on ceramic filter surface off.
Detailed description of the invention
Fig. 1 is one schematic diagram of plug-in type laser gas analysis device structure of the invention
Fig. 2 is two schematic diagram of plug-in type laser gas analysis device structure of the invention
Specific embodiment
The present invention provides two kinds of structures, such as Fig. 1 and Fig. 2 schematic diagram.Combination schematic diagram carries out embodiments of the present invention
Detailed description.
Plug-in type laser gas analysis device one mode of structure of the invention is as shown in Figure 1, comprising: laser transmitting-receiving and thermoelectricity
Even signal processing unit 1, laser channeling 3, verifies the outer of standard gas intake line 4, blowback pipeline 5, flue or stove at protecting pipe 2
Wall 6, ceramic filter 7, mounting flange 8, laser mirror 9, gas detection cell 11, thermocouple.
Plug-in type laser gas analysis device is fixed in protecting pipe 2, across the outer wall 6 of flue or stove be inserted into flue or
In burner hearth, gas is tested by ceramic filter 7 and penetrates into gas detection cell 11, laser transmitting-receiving and thermocouple signal processing unit 1
In laser emission probe transmitting correspond to gas absorption spectra measurement light, measurement light by laser channeling 3 enter gas examine
Room 11 is surveyed, reaches laser mirror 9, laser mirror 9 again reflects measurement light, by gas detection cell 11 and laser channeling 3
Return laser light transmitting-receiving and thermocouple signal processing unit 1, measurement light is in the light path that gas detection cell enters and emits by gas
Body spectral absorption, the laser in laser transmitting-receiving and thermocouple signal processing unit 1 receive probe and receive by tested gaseous spectrum
Measurement light after absorption, is converted to corresponding electric signal, using the signal of laser transmitting-receiving and thermocouple signal processing unit 1 point
Analysis and processing module calculate corresponding gas composition concentration to electric signal analysis is received.
When 7 outer surface of ceramic filter is more serious by pneumatic dust blockage ratio, influences gas and pass through gas detection cell 11
When, verification standard gas intake line 4 is closed, pure air is passed through in blowback pipeline 5, purges ceramic filter outer surface dust, it is extensive
Multiple ceramic filter clean surface state.
For the accuracy for guaranteeing the detection of plug-in type laser gas analysis device, periodically to present apparatus gauging calibration, when calibration
Blowback pipeline 5 is closed, standard gas is passed through calibration by verifying standard gas intake line 4.
The thermocouple 12 of plug-in type laser gas analysis device of the invention protrudes into sensing chamber, on-line checking flue gas temperature
Degree.
Plug-in type laser gas analysis device two modes of structure of the invention are as shown in Figure 2, comprising: laser transmitting-receiving and thermoelectricity
Even signal processing unit 1, laser channeling 3, verifies the outer of standard gas intake line 4, blowback pipeline 5, flue or stove at protecting pipe 2
Wall 6, ceramic filter 7, mounting flange 8, laser mirror 9, laser channeling through-hole 10, gas detection cell 11, thermocouple 12.
Plug-in type laser gas analysis device is fixed in protecting pipe 2, across the outer wall 6 of flue or stove be inserted into flue or
In burner hearth, gas is tested by ceramic filter 7 and penetrates into gas detection cell 11, and by laser channeling through-hole 10, with laser
3 bottom of channel communicates, and the laser emission probe transmitting in laser transmitting-receiving and thermocouple signal processing unit 1 corresponds to gas and absorbs
The measurement light of spectrum, measurement light enter gas detection cell 11 by laser channeling 3, reach bottom laser reflector 9, laser reflection
Mirror 9 again reflects measurement light, by gas detection cell 11 and the transmitting-receiving of 3 return laser light of laser channeling and thermocouple signal processing unit
1, measurement light is absorbed in the light path that gas detection cell enters and emits by gaseous spectrum, at laser transmitting-receiving and thermocouple signal
It manages the laser in unit 1 and receives measurement light of the probe reception after being tested gaseous spectrum and absorbing, be converted to corresponding electric signal,
It calculates using the Digital Signal Analysis and Processing module of laser transmitting-receiving and thermocouple signal processing unit 1 electric signal analysis is received
Gas composition concentration is corresponded to out.
When 7 outer surface of ceramic filter is more serious by pneumatic dust blockage ratio, influences gas and pass through gas detection cell 11
When, verification standard gas intake line 4 is closed, pure air is passed through in blowback pipeline 5, purges ceramic filter outer surface dust, it is extensive
Multiple ceramic filter clean surface state.
For the accuracy for guaranteeing the detection of plug-in type laser gas analysis device, periodically to present apparatus gauging calibration, when calibration
Blowback pipeline 5 is closed, standard gas is passed through calibration by verifying standard gas intake line 4.
The thermocouple 12 of plug-in type laser gas analysis device of the invention protrudes into sensing chamber, on-line checking flue gas temperature
Degree.
Claims (6)
1. a kind of plug-in type laser gas analysis device, the analytical equipment includes that laser transmitting-receiving and thermocouple signal processing are single
Member, protecting pipe, laser channeling, verification standard gas intake line, blowback pipeline, ceramic filter, mounting flange, laser mirror,
Laser channeling through-hole, gas detection cell, thermocouple.
2. analytical equipment according to claim 1, it is characterised in that: the laser reflection and receiving transducer of described device are placed
In side, laser transmitting-receiving and thermocouple signal processing unit are concentrated on.
3. analytical equipment according to claim 1, it is characterised in that: the bottom gas sensing chamber of described device is using ceramics
Filter filters the dust in gas, keeps gas detection cell clean.
4. analytical equipment according to claim 1, it is characterised in that: laser is arranged in the bottom gas sensing chamber of described device
Laser emission is returned laser pick-off probe by reflective mirror, and mirror material is platinized platinum, quartz glass or the reflective material of other high temperature resistants
Material.
5. analytical equipment according to claim 1, it is characterised in that: the laser channeling of described device is inserted into gas detection cell
Hole is opened in part and gas detection cell penetrates through.
6. analytical equipment according to claim 1, it is characterised in that: the standard gas input channel of described device and blowback channel
A public pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710554468.9A CN109211836A (en) | 2017-07-07 | 2017-07-07 | Plug-in type laser gas analysis device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710554468.9A CN109211836A (en) | 2017-07-07 | 2017-07-07 | Plug-in type laser gas analysis device and method |
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| Publication Number | Publication Date |
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| CN109211836A true CN109211836A (en) | 2019-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710554468.9A Pending CN109211836A (en) | 2017-07-07 | 2017-07-07 | Plug-in type laser gas analysis device and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848739A (en) * | 2019-10-16 | 2020-02-28 | 华电电力科学研究院有限公司 | Intelligent purging anti-blocking system and method for zirconia oxygen content measuring probe |
| CN110954502A (en) * | 2019-12-18 | 2020-04-03 | 北京航天易联科技发展有限公司 | Optical air chamber probe, pipeline flowing gas real-time detection device and method |
| CN112729605A (en) * | 2021-02-26 | 2021-04-30 | 王世有 | Optical fiber temperature measurement system based on spectrum absorption principle |
| CN114354297A (en) * | 2022-03-21 | 2022-04-15 | 朗思传感科技(深圳)有限公司 | Filter screen probe |
-
2017
- 2017-07-07 CN CN201710554468.9A patent/CN109211836A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848739A (en) * | 2019-10-16 | 2020-02-28 | 华电电力科学研究院有限公司 | Intelligent purging anti-blocking system and method for zirconia oxygen content measuring probe |
| CN110954502A (en) * | 2019-12-18 | 2020-04-03 | 北京航天易联科技发展有限公司 | Optical air chamber probe, pipeline flowing gas real-time detection device and method |
| CN112729605A (en) * | 2021-02-26 | 2021-04-30 | 王世有 | Optical fiber temperature measurement system based on spectrum absorption principle |
| CN114354297A (en) * | 2022-03-21 | 2022-04-15 | 朗思传感科技(深圳)有限公司 | Filter screen probe |
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