CN113237845A - Integrated SO2Cross interference compensation device - Google Patents
Integrated SO2Cross interference compensation device Download PDFInfo
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- 238000001514 detection method Methods 0.000 claims abstract description 50
- 229910052724 xenon Inorganic materials 0.000 claims description 22
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 22
- 239000013307 optical fiber Substances 0.000 claims description 21
- 238000004422 calculation algorithm Methods 0.000 claims description 18
- 238000004321 preservation Methods 0.000 claims description 11
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- 239000007789 gas Substances 0.000 abstract description 171
- 238000012360 testing method Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003546 flue gas Substances 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000012821 model calculation Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000003595 spectral effect Effects 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 5
- 230000002452 interceptive effect Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000002211 ultraviolet spectrum Methods 0.000 description 2
- 238000004566 IR spectroscopy Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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- G—PHYSICS
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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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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- G—PHYSICS
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- 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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- 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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
- G01N2021/3545—Disposition for compensating effect of interfering gases
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Abstract
本发明公开了一种集成式SO2交叉干扰补偿装置，涉及环境监测设备领域，包括CH4气体检测传感器、H2S、NH3气体检测传感器，所述CH4气体检测传感器包括第一气体池，所述第一气体池的外表面设置有步进电机，所述步进电机的输出端固定连接有输出轴，本发明中，通过CH4气体检测传感器采用红外气体相关滤波法与H2S、NH3气体检测传感器采用紫外光谱吸收法相结合的方法，分别对CH4、NH3、H2S气体的精确检测，结合模型计算，实现对SO2检测中的交叉干扰进行有效补偿，从而消除烟气中存在CH4、NH3、H2S气体时，对SO2测试会产生不同程度干扰，能够大幅提升固定污染源复杂烟气中SO2测试的准确性。
The invention discloses an integrated SO 2 cross-interference compensation device, which relates to the field of environmental monitoring equipment, including a CH 4 gas detection sensor, a H 2 S and NH 3 gas detection sensor, and the CH 4 gas detection sensor includes a first gas pool , the outer surface of the first gas pool is provided with a stepping motor, and the output end of the stepping motor is fixedly connected with an output shaft. In the present invention, the CH 4 gas detection sensor adopts the infrared gas correlation filtering method and the H 2 S , NH 3 gas detection sensor adopts the method of combining ultraviolet spectral absorption method to accurately detect CH 4 , NH 3 , H 2 S gas respectively. Combined with model calculation, the cross-interference in SO 2 detection can be effectively compensated and eliminated. When there are CH 4 , NH 3 and H 2 S gas in the flue gas, it will interfere with the SO 2 test to varying degrees, which can greatly improve the accuracy of the SO 2 test in the complex flue gas of fixed pollution sources.
Description
Technical Field
The invention relates to the field of environmental monitoring equipment, in particular to an integrated SO2A cross interference compensation device.
Background
Infrared spectroscopy and constant potential electrolysis flue gas analyzers are widely applied to fixed pollution source flue gas testing. Over the years, through observationFinding and inquiring information, when CH exists in smoke4、NH3、H2S gas to SO2The test will generate interference of different degrees, resulting in test data distortion and causing troubles to the decision of the ecological environment management department.
Currently, infrared spectrophotometers detect SO2When a single wavelength is adopted, the luminous flux with effective wavelength (7.3 mu m) is realized through a band-pass filter, and the attenuation of the luminous flux corresponds to SO2The concentration of (c). Considering the absorption intensity for enhancing the amount of transmitted light, the half width of the filter is increased by the width, and if other unknown gases also absorb at the wavelength of the width, SO will be absorbed2The detection of (2) brings interference, resulting in deviation of the test result. The sensor of the constant potential electrolysis method has serious cross interference phenomenon in the complex flue gas, although the sensor provides prompt data of relevant interference when leaving the factory, the data range is wider, the application of a flue gas analyzer manufacturer to the prompt data is obviously insufficient, and SO is caused2Data interference phenomena are common.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an integrated SO2A cross interference compensation device.
In order to achieve the purpose, the invention adopts the following technical scheme:
integrated SO2The cross interference compensation device comprises CH4Gas detection sensor, H2S、NH3Gas detection sensor, said CH4The gas detection sensor comprises a first gas pool, wherein a stepping motor is arranged on the outer surface of the first gas pool, an output end fixedly connected with output shaft of the stepping motor, a modulation wheel is fixedly connected with the other end of the output shaft of the stepping motor, an infrared light source is arranged on the outer surface of the first gas pool, a second concave mirror and a third concave mirror are fixedly arranged on the inner wall of one side of the first gas pool, a first concave mirror is fixedly arranged on the inner wall of the other side of the first gas pool, a first gas inlet is fixedly connected with the input end of the first gas pool, and the output end of the first gas pool is fixedA first exhaust port is connected, and an infrared detector is arranged outside the CH4 gas detection sensor;
said H2S、NH3The gas detection sensor comprises a second gas pool, wherein a xenon lamp light source module and a spectrometer module are arranged on the outer surface of the second gas pool, an optical fiber collimator and an optical fiber focalizer are fixedly arranged on one side of the second gas pool, an output end of the xenon lamp light source module is fixedly connected with an optical fiber, a fourth concave mirror is fixedly arranged on the inner wall of one side of the second gas pool, a fifth concave mirror and a sixth concave mirror are fixedly arranged on the inner wall of the other side of the second gas pool, a second gas inlet is fixedly connected with the input end of the second gas pool, a second gas outlet is fixedly connected with the output end of the second gas pool, and the H gas is discharged from the H gas pool2S、NH3And a central control CPU module and a cross interference algorithm processor are arranged outside the gas detection sensor.
Preferably, a window is fixedly installed on the outer wall of the first gas pool, the window corresponds to a modulation wheel, and the modulation wheel corresponds to an infrared light source.
Preferably, the output end of the xenon lamp light source module is connected with the input end of the optical fiber collimator through an optical fiber, and the input end of the spectrometer module is connected with the output end of the optical fiber focalizer through an optical fiber.
Preferably, the size of the second concave mirror and the size of the third concave mirror are smaller than the size of the first concave mirror, and the size of the fifth concave mirror and the size of the sixth concave mirror are smaller than the size of the fourth concave mirror.
Preferably, the infrared light source and the first corner reflector correspond to each other, and the second corner reflector and the infrared detector correspond to each other.
Preferably, said H2S、NH3And a gas cell heating sheet is fixedly arranged in the gas detection sensor.
Preferably, the xenon lamp light source module comprises a shell, xenon lamp light is fixedly installed in the shell, and a light source driving plate is fixedly installed in the shell.
Preferably, the spectrometer module includes the heat preservation box, the inside fixed mounting of heat preservation box has the spectrometer heating plate, the inside fixed mounting of heat preservation box has the spectrometer.
Preferably, the central control CPU module is electrically connected to the cross interference algorithm processor, and the spectrometer and the infrared detector are both electrically connected to the cross interference algorithm processor.
The invention has the beneficial effects that:
in the present invention, through CH4The gas detection sensor adopts an infrared gas correlation filtering method and H2S、NH3The gas detection sensor adopts a method of combining ultraviolet spectrum absorption methods to respectively detect CH4、NH3、H2Accurate detection of S gas, combined with model calculation, realizes SO2Cross interference in detection is effectively compensated, so that CH in smoke is eliminated4、NH3、H2S gas to SO2The test can generate different degrees of interference, and the SO in the complex smoke of the fixed pollution source can be greatly improved2And (4) testing accuracy.
Drawings
FIG. 1 shows an integrated SO according to the present invention2CH of cross interference compensation device4The structure of the gas detection sensor is schematic.
FIG. 2 is an integrated SO according to the present invention2Cross interference compensation device H2S、NH3The structure of the gas detection sensor is schematic.
FIG. 3 is an integrated SO according to the present invention2The structure schematic diagram of the xenon lamp light source module of the cross interference compensation device.
FIG. 4 is an integrated SO according to the present invention2The structure diagram of the spectrometer module of the cross interference compensation device is shown.
FIG. 5 is an integrated SO according to the present invention2CH of cross interference compensation device4Gas detection sensor, H2S、NH3The gas detection sensor, the central control CPU module, the cross interference algorithm processor and the connection relation flow chart.
FIG. 6 shows the present inventionIntegrated SO2A software flow diagram of a cross-interference compensation apparatus.
Reference numbers in the figures: 1. CH (CH)4A gas detection sensor; 101. a first gas cell; 102. a stepping motor; 103. a modulation wheel; 104. an infrared light source; 105. a window piece; 106. a first corner mirror; 107. a second corner mirror; 108. a first concave mirror; 109. a second concave mirror; 110. a third concave mirror; 111. a first air inlet; 112. a first exhaust port; 113. an infrared detector; 2. h2S、NH3A gas detection sensor; 201. a second gas cell; 202. a xenon lamp light source module; 20201. a housing; 20202. a light source driving board; 20203. xenon light; 203. an optical fiber; 204. a fiber collimator; 205. an optical fiber focuser; 206. a second air inlet; 207. a second exhaust port; 208. a fourth concave mirror; 209. a fifth concave mirror; 210. a sixth concave mirror; 211. a gas cell heater plate; 212. a spectrometer module; 21201. a heat preservation box; 21202. a spectrometer; 21203. a spectrometer heating plate; 3. a central control CPU module; 4. and a cross interference algorithm processor.
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.
The first embodiment is as follows:
as shown in figures 1 to 4:
integrated SO2The cross interference compensation device comprises CH4Gas detection sensor 1, H2S、NH3 Gas detection sensor 2, CH4The gas detection sensor 1 comprises a first gas pool 101, a stepping motor 102 is arranged on the outer surface of the first gas pool 101, an output end of the stepping motor 102 is fixedly connected with an output shaft, a modulation wheel 103 is fixedly connected with the other end of the output shaft of the stepping motor 102, an infrared light source 104 is arranged on the outer surface of the first gas pool 101, a second concave mirror 109 and a third concave mirror 110 are fixedly mounted on the inner wall of one side of the first gas pool 101, and a second concave mirror 109 and a third concave mirror 110 are fixedly mounted on the inner wall of the other side of the first gas pool 101A first concave mirror 108 is arranged, the input end of the first gas pool 101 is fixedly connected with a first gas inlet 111, and the output end of the first gas pool 101 is fixedly connected with a first gas outlet 112, CH4An infrared detector 113 is arranged outside the gas detection sensor 1;
H2S、NH3 gas detection sensor 2 includes second gas cell 201, the surface of second gas cell 201 is provided with xenon lamp light source module 202, spectrum appearance module 212, one side fixed mounting of second gas cell 201 has optical collimator 204, optical fiber focuser 205, xenon lamp light source module 202's output fixedly connected with optic fibre 203, one side inner wall fixed mounting of second gas cell 201 has fourth concave mirror 208, the opposite side inner wall fixed mounting of second gas cell 201 has fifth concave mirror 209, sixth concave mirror 210, the input end fixed connection of second gas cell 201 has second air inlet 206, the output end fixed connection of second gas cell 201 has second gas vent 207, H is gas cell 2012S、NH3And a central control CPU module 3 and a cross interference algorithm processor 4 are arranged outside the gas detection sensor 2.
Wherein:
CH4a window 105 is fixedly installed on the outer wall of the gas detection sensor 1, the window 105 corresponds to the modulation wheel 103, the modulation wheel 103 corresponds to the infrared light source 104, and light emitted by the infrared light source 104 enters the first gas cell 101 through the modulation wheel 103 and the window 105.
The output end of the xenon lamp light source module 202 is connected with the input end of the optical fiber collimator 204 through the optical fiber 203, and the input end of the spectrometer module 212 is connected with the output end of the optical fiber focalizer 205 through the optical fiber 203.
The sizes of the second concave mirror 109 and the third concave mirror 110 are smaller than the size of the first concave mirror 108, and the sizes of the fifth concave mirror 209 and the sixth concave mirror 210 are smaller than the size of the fourth concave mirror 208.
The infrared light source 104 corresponds to the first corner reflector 106, the second corner reflector 107 corresponds to the infrared detector 113, light emitted by the infrared light source 104 is refracted through the first corner reflector 106, light in the first gas cell 101 is refracted to the outside of the first gas cell 101 through the second corner reflector 107, and the light is received through the infrared detector 113.
Wherein:
H2S、NH3the gas detection sensor 2 is fixedly provided with a gas cell heater chip 211 inside, the temperature in the second gas cell 201 is increased by the gas cell heater chip 211, and NH is avoided by the high-temperature gas circuit3The accuracy of the condensation adsorption promotion detection in the second gas pool 201 completes the ultraviolet high-temperature gas detection device, and H is realized2S and NH3And (4) measuring the gas.
The xenon lamp light source module 202 comprises a shell 20201, xenon lamp light 20203 is fixedly installed inside the shell 20201, a light source driving board 20202 is fixedly installed inside the shell 20201, and the xenon lamp light 20203 is provided with a power supply and the modulation of light source frequency by the light source driving board 20202.
The spectrometer module 212 comprises a heat preservation box 21201, a spectrometer heating plate 21203 is fixedly installed inside the heat preservation box 21201, a spectrometer 21202 and a spectrometer heating plate 21203 are fixedly installed inside the heat preservation box 21201 to heat the spectrometer 21202, so that the temperature inside the heat preservation box 212001 is kept at a constant temperature state, the accuracy of detection of the spectrometer heating plate 21203 is improved, and the heat preservation box 21201 is made of aluminum.
The central control CPU module 3 is electrically connected to the cross interference algorithm processor 4, and the spectrometer 21202 and the infrared detector 113 are both electrically connected to the cross interference algorithm processor 4 through the cross interference algorithm processor 4.
Example two:
an independent infrared gas related filtering method and an ultraviolet spectrum absorption method are combined to complete a set of device to realize CH4、NH3And H2Accurate detection of S gas, and realization of SO by mathematical model2Compensation of cross interference in testing to promote SO in stationary pollution sources2Accurate detection of.
And (3) cross interference compensation algorithm:
1. the target gas mainly absorbs the wavelength lambda 1, the interference gas mainly absorbs the wavelength lambda 2, and the interference gas is slightly absorbed at the position lambda 1; target gas at lambda 2 is not absorbed, so that the target gas does not generate cross interference on interference gas; the interference gas at lambda 1 is absorbed, so that the interference gas can generate cross interference on the target gas.
2. The premise hypothesis is that:
(1) the target gas concentration is zero and as the interfering gas concentration increases, the target gas sensor reading also increases.
(2) When the concentration of the interference gas is fixed, the larger the concentration of the target gas is, the smaller the reading error of the target gas sensor is.
(3) The interfering gas concentration is timed, and the target gas concentration and the reading of the sensor thereof are in a linear relationship.
3. Design full test and obtain standard table one
The first standard table indicates that a symbol x (wherein i is 0,1,2.. n) represents an actual concentration value of a target gas in an introduced mixed gas, and a symbol y (wherein j is 0,1,2.. n.) represents an actual concentration value of an interference gas in the introduced mixed gas0Row and y0The corresponding sample concentration combination is that the concentration of the target gas in the mixed gas is x0Concentration of interfering gas is y0The gas corresponding to the first cell is generally set as the inlet gas, Std _ x0y0This indicates that the reading on the target sensor is now present, and so on.
In practice, according to the (3) th hypothesis of the precondition assumptions, the target gas concentration and the reading of the sensor thereof have a linear relationship when the interfering gas concentration is constant, and only the test x is needed0And xnThe data of the corresponding column can be interpolated by linear fitting to obtain the data of other columns. For example, fitting (x)0，Std_x0y0) And (x)n，Std_xny0) Obtaining the linear company y as kx + b, and interpolating the point x1，x2，...，xn-1Respectively substituting into the standard table to obtain y0All values in this row, and the data in the other rows are analogized.
Table 1: standard watch 1
4. Calibration of standard tables
Calibration table description:
x0y0indicating that the target gas sensor reads the value when zero gas is introduced.
x0ynAnd when mileage concentration pure interference gas is introduced, the target gas sensor reads a numerical value.
xny0Indicating that the target gas sensor reads the value when the pure target gas with the child range concentration is introduced.
xnynAnd when the target gas with the measuring range concentration and the disturbance gas with the child range concentration are introduced, the target gas sensor reads the value.
Table 2: calibration gauge
5. Acquisition of Standard Table two
(1)△1＝x0y0-Std_x0y0
k1＝(x0yn+△1)/Std_x0yn
Will standard table x0Columns are respectively connected with k1Multiplying to obtain x of the new table0And (4) columns.
(2)△2＝xny0-Std_xny0
k2＝(xnyn+△2)/Std_xnyn
Will standard table xnColumns are respectively connected with knMultiplying to obtain x of the new tablenAnd (4) columns.
(3) According to the assumption in the item (3), when the concentration of the interfering gas is constant, the concentration of the target gas and the reading of the sensor thereof present a linear relationship, and the data of other columns are obtained through linear fitting interpolation. For example, fitting (x)0，K1×Std_x0y0) And (x)n，K2×Std_xny0) Obtaining the linear company y as kx + b, and interpolating the point x1，x2，...，xn-1Respectively substituting into the standard table to obtain y0All values in this row, and the data in the other rows are analogized.
Table 3: standard watch 2
6. Calculating the concentration value of the target gas after deducting the interference gas
Table 4: standard table III
Wherein the interference gas sensor reading cyTarget gas sensor reading cx。
Fitting (y)a，Std_x0ya) And (y)a+1，Std_x0ya+1) Get y0＝k0x+b0Substituted into cyTo obtain x0Interpolated concentration c of the column0。
Fitting (y)a，Std_xnya) And (y)a+1，Std_xnya+1) Get yn＝knx+bnSubstituted into CyTo obtain xnInterpolated concentration c of the columnn。
Fitting (x)0，c0) And (x)n，cn)，Y is kx + b, and c is substitutedxCalculating to obtain a concentration value kc after interference is deductedx+b。
Example three:
1. calibration experiment:
firstly, introducing CH with a calibrated concentration4Gas is measured, after multi-point calibration experiment, software can arrange and analyze multi-point calibration data to obtain CH4To SO2A cross interference model.
Secondly, NH with a calibrated concentration is introduced3The gas was also subjected to the first step of the experiment to obtain NH3To SO2A cross interference model.
Thirdly, introducing H with a calibrated concentration2S gas is also subjected to the first step of experiment to finally obtain H2S to SO2A cross interference model.
The experimental equipment generates a CH after completing calibration4、NH3、H2S to SO2A cross interference model.
2. Target gas measurement
Firstly, mixed target gas with unknown concentration is introduced for measurement. Through SO2The analyzer measures the current interfered SO2Is sent to a cross interference algorithm processor 4 in the device through a communication port, and the device simultaneously carries out the treatment on CH in the mixed gas with unknown concentration4、NH3、H2The concentration of S was measured separately.
The obtained SO2、CH4、NH3、H2Bringing the measured concentration value of S into CH output by calibration experiment4、NH3、H2S to SO2Performing cross interference iteration in the cross interference model, and finally outputting the real SO2Concentration values.
Example four:
the specific use mode and function of the first embodiment are as follows:
it is worth mentioning that SO2The analyzer is GT-2000 (SO)2) The matching circuit can be provided by the manufacturer, exceptIn addition, SO is included in the present invention2Analyzers are prior art and are fully within the reach of those skilled in the art, and it is not necessary to state that the invention is not directed to SO2The improvement of the internal structure and the working principle of the analyzer.
When used in the present invention, CH4Gas detection sensor 1 and SO2The analyzers are all low-temperature gas circuits connected in series with gas circuits H2S、NH3The gas detection sensor is a high-temperature gas circuit H2S、NH3Gas detection sensor and CH4Gas detection sensor 1 and SO2The gas paths of the analyzers are connected in parallel;
when SO2、CH4、NH3、H2Introducing SO into the S mixed gas2The analyzer performs the test to obtain SO2Sensor pair SO2Indicating value data of the gas is input into a cross interference algorithm processor 4;
then SO2、CH4、NH3、H2S mixed gas enters a first gas pool 101 through a first gas inlet 111 and is discharged through a first gas outlet 112, so that the gas discharging work can be smoothly carried out, a stepping motor 102 is started, the stepping motor 102 drives a modulation wheel 103 to rotate, a measurement signal and a reference signal of gas to be measured are modulated through the modulation wheel 103, an infrared light source 104 is started, the infrared light source 104 emits an infrared light source, light rays enter the first gas pool 101 through a window sheet 105 and are refracted through a first corner reflector 106, multiple reflection is carried out through a first concave mirror 108, a second concave mirror 109 and a third concave mirror 110, the light rays are irradiated to the outside of the first gas pool 101 through a second corner reflector 107, the light rays are received through an infrared detector 113 outside the first gas pool 101, the infrared detector 113 detects the gas, the measurement signal and the reference signal are detected through the infrared detector 113, transmitting the collected data to a cross interference algorithm processor 4;
please refer to fig. 1 for the above structure and process.
With SO2、CH4、NH3、H2The S-mixed gas enters the second gas cell 201 through the second gas inlet 206,the gas introduced into the second gas cell 201 is heated to high temperature by the gas cell heating sheet 211, the high-temperature gas path is used for avoiding condensation and adsorption of NH3 in the second gas cell 201 so as to improve the detection accuracy, the light source drive board 20202 provides power supply for the xenon lamp 20203 and modulation of the light source frequency, the light source drive board 20202 drives the xenon lamp 20203, ultraviolet light emitted by the xenon lamp 20203 is emitted into the second gas cell 201 through the optical fiber 203 and the optical fiber collimator 204, the ultraviolet light is introduced into the spectrometer module 212 through the optical fiber 203 after being reflected for multiple times by the fifth concave mirror 209, the sixth concave mirror 210 and the fourth concave mirror 208 and then passing through the optical fiber focalizer 205, and the spectrometer heating sheet 21203 heats the spectrometer 21202 so as to ensure that the temperature in the heat preservation box 21201 is in a constant temperature state and improve the detection accuracy of the spectrometer heating sheet 21203, data is collected through the spectrometer 21202, and the collected data is transmitted to the cross interference algorithm processor 4;
the above structure and process are shown in FIGS. 2-4.
Communicating the 3 groups of data to a cross interference algorithm processor 4, calculating by using the established mathematical model, transmitting to a data storage 6, and outputting to obtain a corrected SO2The gas concentration.
Please refer to fig. 5 for the above structure and process.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
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| CN202110647488.7A CN113237845A (en) | 2021-06-10 | 2021-06-10 | Integrated SO2Cross interference compensation device |
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