CN103149171A - Combustion exhaust analysis device - Google Patents
Combustion exhaust analysis device Download PDFInfo
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- CN103149171A CN103149171A CN2012105070482A CN201210507048A CN103149171A CN 103149171 A CN103149171 A CN 103149171A CN 2012105070482 A CN2012105070482 A CN 2012105070482A CN 201210507048 A CN201210507048 A CN 201210507048A CN 103149171 A CN103149171 A CN 103149171A
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- gas concentration
- concentration lwevel
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- sample air
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Abstract
The invention provides a combustion exhaust analysis device enabling a measurer to identify errors of measurements of a CO2 sensor. An operation processing part (32) comprises an operation unit (34), a correcting unit (36), a correlativity data hold part (37), a carbon dioxide concentration presumption unit (38) and a carbon dioxide concentration error presumption unit (40). The correlativity data hold part (37), the carbon dioxide concentration presumption unit (38) and the carbon dioxide concentration error presumption unit (40) are used for evaluating the accuracy of the measurement of carbon dioxide concentration used in correcting of component concentration of a measurement target by the correcting unit (36). In order that the accuracy of the carbon dioxide concentration of sample gas obtained according to a signal acquired by the CO2 sensor (14) can be judged, the measurement of an O2 sensor (24) in the device is used.
Description
Technical field
The present invention relates to a kind of burning gases such as burning and gas-exhausting with the fuel-burning power plant as sample air, to the S0 in sample air
2And the concentration of NOx, the CO burning and gas-exhausting analytical equipment that carries out continuous coverage.
Background technology
S0 in the burning and gas-exhausting that fuel-burning power plant etc. produce
2And the concentration general using infrared absorbing type gas analyzer of the compositions such as NOx, CO is measured continuously.The test section of infrared absorbing type gas analyzer comprises: be used for making the sample chamber as the burning and gas-exhausting circulation of sample air; The light source of light is measured in irradiation to sample chamber; With according to the measurement light that sees through sample chamber, the survey sensor that the concentration of the predetermined component in sample chamber is detected is (referring to patent documentation 1.）。
Be provided with S0 in test section
2And the survey sensor measured of the concentration of composition separately such as NOx, CO.Each survey sensor possesses the chamber that the gas of each measuring object composition is enclosed, and by making the measurement light that has seen through sample chamber indoor through this, optionally the infrared ray in the absorbing wavelength zone of measuring object composition is measured.
Also contain C0 in burning and gas-exhausting
2There is C0
2Infrared ray absorbing wavelength band and S0
2And the absorbing wavelength band portion of NO, CO is overlapping, C0
2Concentration to S0
2And the measured value of the concentration of NO, CO produces the problem of disturbing effect.In order to suppress because of C0
2And the interference to measured value that causes, the light incident side in the chamber of detecting device generally disposes C0
2The filtrator removed of the light of infrared ray absorbing wavelength region may or with CO
2The gas filter that gas is enclosed.
But, in these filtrators, because not having can be with C0
2The light of infrared ray absorbing wavelength region may remove fully, thereby arrange separately the CO in sample air
2The CO that concentration is measured
2Sensor is with the CO that records
2Concentration is come S0
2And the measured value of the concentration of NO, CO is revised.In addition, as CO
2Sensor adopts thermoelectric pickup etc.
The prior art document
Patent documentation
Patent documentation 1 Japanese kokai publication hei 10-82740 communique
Summary of the invention
The problem that invention will solve
Due to the S0 as the measuring object composition
2And the higher measuring accuracy of concentration requirement of NO, CO, each survey sensor that these compositions are detected often adopts calibrating gas to proofread and correct termly.On the contrary, to being used for carrying out S0
2And the C0 of the concentration correction of NO, CO
2Concentration but do not pay attention to its measuring accuracy, thereby to CO
2Sensor takes the regular calibration in time hardly.
CO
2The zero correction of sensor can be to S0
2And the sensor of the measuring object compositions such as NO, CO carries out when carrying out zero correction together.But, need in addition CO because SPAN proofreaies and correct
2Calibrating gas, thereby do not carry out under state that SPAN proofreaies and correct and be used in (for example several months or several years) between longer-term often.For this reason, even because of CO
2The drift of sensor or fault etc. abnormal and cause CO
2Measured value produces larger error, and gauger also None-identified should be abnormal.Due to gauger's None-identified CO
2The measured value of sensor is abnormal, so exist with the CO that comprises larger error
2The measured value of concentration is to S0
2The measured value that reaches NO, CO is revised, thereby makes S0
2And the problem of the measuring accuracy variation of NO, CO.
Therefore, the present invention is so that the gauger can identify CO
2The error that the measured value of sensor produces is purpose.
Be used for solving the means of problem
Burning and gas-exhausting analytical equipment of the present invention is characterized in that, comprising: survey sensor, and it possesses be used to the sample chamber that makes the sample air circulation, by light is measured in this sample chamber irradiation, sends the signal of the concentration of the measuring object composition in sample air; Carbon dioxide sensor, it sends the signal of the gas concentration lwevel in sample air according to the measurement light that sees through sample chamber; Oxygen sensor, it sends the signal of the oxygen concentration in sample air; Arithmetic processing section comprises: the measuring object composition arithmetic element of obtaining the measuring object constituent concentration in sample air according to the signal of survey sensor; Obtain the gas concentration lwevel arithmetic element of the gas concentration lwevel in sample air according to the signal of carbon dioxide sensor; Obtain the oxygen concentration arithmetic element of the oxygen concentration in sample air according to the signal of oxygen sensor; And the amending unit of the measuring object constituent concentration being revised with the gas concentration lwevel that the gas concentration lwevel arithmetic element is tried to achieve, arithmetic processing section possesses: the correlationship data maintaining part that the correlationship data of the oxygen concentration in sample air and gas concentration lwevel are kept; The correlationship data that keep according to correlationship data maintaining part, the gas concentration lwevel that the oxygen concentration of being tried to achieve by the oxygen concentration arithmetic element is inferred the gas concentration lwevel in sample air is inferred the unit; And gas concentration lwevel is inferred the gas concentration lwevel that the gas concentration lwevel of inferring the unit and gas concentration lwevel arithmetic element try to achieve compare, in the situation that the difference of two gas concentration lwevels surpasses predefined reference value, be judged to be abnormal gas concentration lwevel error identifying unit.
The effect of invention
The present invention is based on and sets up certain this knowledge of correlationship between the concentration of concentration oxygenous in burning and gas-exhausting and carbon dioxide and make.In the past, the oxygen sensor that the concentration of contained oxygen is measured in generally being provided with sample air in the burning and gas-exhausting analytical equipment based on the measured value of this oxygen sensor, can be inferred the concentration of carbon dioxide contained in sample air.In the present invention, be to utilize based on the presumed value of the gas concentration lwevel in the resulting sample air of the measured value of the oxygen sensor determinating reference as the accuracy of the measured value of carbon dioxide sensor.
Namely, the concentration of each composition obtained by burning and gas-exhausting analytical equipment of the present invention, its signal based on survey sensor and carbon dioxide sensor and the arithmetic processing section of carrying out computing comprises: the correlationship data maintaining part that the correlationship data of the oxygen concentration in sample air and gas concentration lwevel are kept; Obtain the oxygen concentration arithmetic element of the oxygen concentration in sample air based on the signal of oxygen sensor; The gas concentration lwevel that the oxygen concentration that the correlationship data that keep based on correlationship data maintaining part are tried to achieve by the oxygen concentration arithmetic element is inferred the gas concentration lwevel in sample air is inferred the unit; And gas concentration lwevel is inferred the gas concentration lwevel that the gas concentration lwevel of inferring the unit and gas concentration lwevel arithmetic element try to achieve compare, when the difference of two gas concentration lwevels surpasses predefined reference value, be judged to be abnormal gas concentration lwevel error identifying unit.Thus,, just can be judged to be extremely when certain above when the error of the gas concentration lwevel that the correction of the measured value of measuring object constituent concentration is used, can easily identify the deterioration of the measuring accuracy of gas concentration lwevel.
Description of drawings
Fig. 1 is the summary construction diagram that an embodiment of burning and gas-exhausting analytical equipment is shown.
Fig. 2 is the summary construction diagram of an example that the structure of test section is shown.
Fig. 3 illustrates oxygen concentration in flue gas and the chart of the correlationship between gas concentration lwevel.
Embodiment
In the preferred embodiment of the present invention, also comprise: when gas concentration lwevel error identifying unit is judged to be when abnormal, the abnormal show section that these abnormal conditions are shown.Thus, the gauger can more easily identify measured value abnormal of gas concentration lwevel.
Below, with reference to Fig. 1, an embodiment of burning and gas-exhausting analytical equipment is described.
The reference gas stream 3 that is provided with for the sample air stream 2 that sample air is imported and is used for reference gas is imported.Sample air stream 2 is connected with the reference gas stream and all is connected switching mechanism 16 with stream and is connected.
Stream connects switching mechanism 16 and is made of two solenoid valve 16a and 16b.Solenoid valve 16a switches to sample air stream 2 one party of measuring in stream 4 or gas exhaust stream 5 and connects; Solenoid valve 16b connects the one party that reference gas stream 3 switches in gas exhaust stream 5 or measurement stream 4.Solenoid valve 16a and 16b are controlled, so that when sample air stream 2 was connected with measurement stream 4, reference gas stream 3 was connected with gas exhaust stream 5; When sample air stream 2 was connected with gas exhaust stream 5,3 of reference gas streams were connected with measurement stream 4.Be provided with needle-valve 20 on gas exhaust stream 5.Needle-valve 20 is in order to adjust when carrying out the switching of sample air and reference gas, so that 0
2The sample air flow that flows in sensor 24 can not change because of the difference of flow path resistance and arrange.
Dispose test section 10 on measurement stream 4.Be provided with flowmeter 18 in the downstream of measuring the test section 10 on stream 4.To narrate in the back about test section 10.
Be connected with on sample air stream 2 and possess 0
2The oxygen measurement stream 6 of sensor 24.Oxygen measurement stream 6 is that the part of the sample air that will be in sample air stream 2 flows is taken out stream so that the oxygen concentration in sample air is measured.0
2Sensor 24 sends and the corresponding signal of oxygen concentration; 0
2The signal that sensor 24 sends is taken into arithmetic processing section 32.Also be provided with needle-valve 26 on oxygen measurement stream 6.Be connected with flow and adjust an end of stream 8 on reference gas stream 3.Flow is adjusted stream 8 and is led to waste pipe 30, and has kapillary 28, and the flow adjustment of the reference gas of supplying with for subtend test section 10 sides arranges.
Arithmetic processing section 32 comprises: arithmetic element 34, amending unit 36, correlationship data maintaining part 37, gas concentration lwevel are inferred unit 38 and gas concentration lwevel error identifying unit 40.
Arithmetic element 34 is carried out basis by survey sensor 12 or CO
2Sensor 14 and 0
2The signal that sensor 24 obtains is obtained S0
2And the computing of measuring object constituent concentration, gas concentration lwevel and the oxygen concentrations such as NO, CO.This arithmetic element 32 comprises gas concentration lwevel arithmetic element and oxygen concentration arithmetic element.
Amending unit 36 is that the gas concentration lwevel that the measuring object constituent concentration utilization of being tried to achieve by arithmetic element 34 is tried to achieve is equally revised.The measuring object constituent concentration of revising by amending unit 36 is shown in display part 42 in real time as measured value.
Correlationship data maintaining part 37, gas concentration lwevel are inferred the precision of measured value of gas concentration lwevel that unit 38 and gas concentration lwevel error identifying unit 40 be used for amending unit 36 is used in the correction of measuring object constituent concentration and are estimated.For to according to by CO
2Whether the gas concentration lwevel in the sample air that the signal that sensor 14 obtains is obtained correctly judge, be provided with in operative installations 0
2The measured value of sensor 24.In addition, this evaluation can be set as during certain (for example, one month) to be carried out, and the gauger also can carry out at any time.
Certain correlationship is arranged between the gas concentration lwevel in burning gases and oxygen concentration.Fig. 3 means the chart of the correlationship of gas concentration lwevel in the burning gases of coal, heavy oil and natural-gas and oxygen concentration.As shown in this chart, gas concentration lwevel and oxygen concentration in burning gases are roughly linear relation, and for example, the gas concentration lwevel in the burning gases of coal and the relation between oxygen concentration can be represented approx by following formula (1).
CO
2Concentration=-0.9 * 0
2Concentration+18.7(1)
Burning gases for heavy oil or natural-gas also can be represented approx by same linear formula.Maintaining the approximate expression such with the corresponding formula of kind (1) of fuel as coal or heavy oil, natural-gas in correlationship data maintaining part 37, before beginning to measure, the gauger is by the kind input arithmetic processing section 32 with fuel, select the approximate expression of the correlationship corresponding with the burning gases of this fuel, be used in inferring of gas concentration lwevel described later.
It is to use the approximate expression that remains in correlationship data maintaining part 37 that gas concentration lwevel is inferred unit 38, and according to the oxygen concentration that arithmetic element 34 is tried to achieve, the gas concentration lwevel in sample air is inferred.
Gas concentration lwevel error identifying unit 40 is inferred the presumed value of trying to achieve unit 38 to gas concentration lwevel as judgment standard, to according to by CO
2Whether the gas concentration lwevel in the sample air that the signal that sensor 14 obtains is obtained correctly judges.Particularly, to according to by CO
2The error that the gas concentration lwevel that the signal that sensor 14 obtains is obtained and gas concentration lwevel are inferred the gas concentration lwevel of obtaining unit 38 whether in certain allowed band (for example the presumed value of gas concentration lwevel ± 3vol% in) judge, if outside allowed band, just be judged to be " extremely ", in display part 42, these abnormal conditions shown.
For example in the situation that sample air is the burning gases of coal, by CO
2Gas concentration lwevel (the CO that the signal of sensor 14 is tried to achieve
2When concentration measurement) satisfying following formula (2) or (3), be judged to be " extremely ".
CO
2Concentration measurement＞-0.9 * 0
2Concentration+(18.7+3) (2)
CO
2Concentration measurement＜-0.9 * 0
2Concentration+(18.7-3) (3)
Arithmetic processing section 32 can be by for example this analytical equipment the computing machine of special use or the CPU(central operation treating apparatus of personal computer) and data-carrier store realize, display part 42 can be realized by the computing machine of special use or the monitor of personal computer.
In addition, can enumerate as test section 10 structure that has as shown in Figure 2.Below, the structure of test section in Fig. 2 10 is described.
CO
2Filtrator 48 has C0 by inclosure
2The chamber form, by making the measurement light process through sample chamber 46, remove C0 from measure light
2The absorbing wavelength composition.Survey sensor 12a, 12b, 12c comprise enclosing respectively S0
2And the some chambers in NO, CO.
Each survey sensor 12a, 12b and 12c pass sample chamber 46 and CO by allowing
2The measurement light of filtrator 48 is through separately chamber, obtains the corresponding signal of concentration of the measuring object composition in the gas with the sample chamber 46 of flowing through.The measuring object composition of each survey sensor 12a, 12b and 12c is that for example, survey sensor 12a is S0
2Survey sensor 12b is NO; Survey sensor 12c is CO.The signal that is obtained by each survey sensor 12a, 12b and 12c is taken into arithmetic processing section 32, obtains the computing of the concentration of each measuring object composition by the arithmetic element 24 of arithmetic processing section 32.
CO
2Sensor 14 accepts to have passed through sample chamber 46, CO
2The measurement light of filtrator 48, survey sensor 12a, 12b, 12c, the light intensity that carbon dioxide is had absorbing wavelength detects.When flowing through sample chamber 46 according to sample air and the CO of reference gas when flowing through sample chamber 46
2The difference of the signal intensity of sensor 14 can be obtained the CO in sample air
2Concentration.The structure of gas concentration lwevel error identifying unit 40 is: the gas concentration lwevel in the sample air that arithmetic element 34 is tried to achieve and gas concentration lwevel are inferred the gas concentration lwevel of inferring out unit 38 and are compared, when the difference of two gas concentration lwevels is more than certain value when (for example more than 3%), be judged to be abnormal.
In addition, CO
2Sensor 14 can be realized by for example electrothermic type sensor.
Symbol description
2 sample air streams
3 reference gas streams
4 measure stream
5 gas exhaust streams
6 oxygen measurement streams
8 bypass flow path
10 test sections
12 survey sensors
14 CO
2Sensor
16 streams connect switching mechanism
18 flowmeters
20,26 needle-valves
24 0
2Sensor
28 kapillaries
30 waste pipes
32 arithmetic processing section
34 arithmetic elements
36 amending units
37 correlationship data maintaining parts
38 gas concentration lwevels are inferred the unit
40 gas concentration lwevel error identifying units
42 display parts.
Claims (2)
1. a burning and gas-exhausting analytical equipment, is characterized in that, comprising:
Survey sensor, it possesses be used to the sample chamber that makes sample air circulation, by light is measured in this sample chamber irradiation, send with sample air in the corresponding signal of concentration of measuring object composition;
Carbon dioxide sensor, it has been according to having seen through the measurement light of described sample chamber, send with sample air in the corresponding signal of gas concentration lwevel;
Oxygen sensor, its send with described sample air in the corresponding signal of oxygen concentration;
Arithmetic processing section, it comprises: the measuring object composition arithmetic element of obtaining the measuring object constituent concentration in sample air according to the signal of described survey sensor; Obtain the gas concentration lwevel arithmetic element of the gas concentration lwevel in sample air according to the signal of described carbon dioxide sensor; Obtain the oxygen concentration arithmetic element of the oxygen concentration in sample air according to the signal of described oxygen sensor; And the amending unit of described measuring object constituent concentration being revised with the gas concentration lwevel that described gas concentration lwevel arithmetic element is tried to achieve, and described arithmetic processing section comprises: the correlationship data maintaining part that the correlationship data of the oxygen concentration in sample air and gas concentration lwevel are kept; The correlationship data that keep according to described correlationship data maintaining part, the gas concentration lwevel that the oxygen concentration of being tried to achieve by described oxygen concentration arithmetic element is inferred the gas concentration lwevel in sample air is inferred the unit; And described gas concentration lwevel is inferred the gas concentration lwevel that the gas concentration lwevel of inferring the unit and described gas concentration lwevel arithmetic element try to achieve compare, in the situation that the difference of two gas concentration lwevels surpasses predefined reference value, be judged to be abnormal gas concentration lwevel error identifying unit.
2. burning and gas-exhausting analytical equipment according to claim 1 also comprises abnormal show section, when described gas concentration lwevel error identifying unit is judged to be when abnormal, these abnormal conditions is shown.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011266382A JP5729285B2 (en) | 2011-12-06 | 2011-12-06 | Combustion exhaust gas analyzer |
| JP2011-266382 | 2011-12-06 |
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| Publication Number | Publication Date |
|---|---|
| CN103149171A true CN103149171A (en) | 2013-06-12 |
| CN103149171B CN103149171B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210507048.2A Active CN103149171B (en) | 2011-12-06 | 2012-11-30 | Combustion exhaust analysis device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5729285B2 (en) |
| CN (1) | CN103149171B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106442857A (en) * | 2016-10-20 | 2017-02-22 | 杭州经略科技服务有限公司 | Detection method and detection device for carbon dioxide emission based on oxygen content determination |
| CN107036994A (en) * | 2017-05-25 | 2017-08-11 | 北京雪迪龙科技股份有限公司 | A kind of non-dispersion infrared gas analyzer of dynamic reference and the method for detecting gas concentration |
| CN108120693A (en) * | 2016-11-29 | 2018-06-05 | 株式会社堀场制作所 | Gas analyzing apparatus and analysis method for gases |
| CN108386260A (en) * | 2017-02-03 | 2018-08-10 | 罗伯特·博世有限公司 | Method for heating and regenerating a particle filter in the exhaust gas of a gasoline engine |
| CN109557869A (en) * | 2018-11-27 | 2019-04-02 | 江苏方天电力技术有限公司 | A kind of fired power generating unit carbon emission on-line monitoring management system |
| CN114754496A (en) * | 2020-12-29 | 2022-07-15 | 芜湖美的厨卫电器制造有限公司 | Control method of gas water heater, gas water heater and readable storage medium |
| CN115436329A (en) * | 2021-06-04 | 2022-12-06 | 株式会社岛津制作所 | Gas measuring device |
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| EP3772644A1 (en) * | 2019-08-06 | 2021-02-10 | Siemens Aktiengesellschaft | Non-dispersive infrared gas analyzer for determining at least two gas components in a measuring gas |
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| CN106442857A (en) * | 2016-10-20 | 2017-02-22 | 杭州经略科技服务有限公司 | Detection method and detection device for carbon dioxide emission based on oxygen content determination |
| CN108120693A (en) * | 2016-11-29 | 2018-06-05 | 株式会社堀场制作所 | Gas analyzing apparatus and analysis method for gases |
| CN108386260A (en) * | 2017-02-03 | 2018-08-10 | 罗伯特·博世有限公司 | Method for heating and regenerating a particle filter in the exhaust gas of a gasoline engine |
| CN108386260B (en) * | 2017-02-03 | 2021-12-03 | 罗伯特·博世有限公司 | Method for heating and regenerating a particle filter in the exhaust gas of a gasoline engine |
| CN107036994A (en) * | 2017-05-25 | 2017-08-11 | 北京雪迪龙科技股份有限公司 | A kind of non-dispersion infrared gas analyzer of dynamic reference and the method for detecting gas concentration |
| CN109557869A (en) * | 2018-11-27 | 2019-04-02 | 江苏方天电力技术有限公司 | A kind of fired power generating unit carbon emission on-line monitoring management system |
| CN114754496A (en) * | 2020-12-29 | 2022-07-15 | 芜湖美的厨卫电器制造有限公司 | Control method of gas water heater, gas water heater and readable storage medium |
| CN114754496B (en) * | 2020-12-29 | 2024-03-08 | 芜湖美的厨卫电器制造有限公司 | Control method of gas water heater, gas water heater and readable storage medium |
| CN115436329A (en) * | 2021-06-04 | 2022-12-06 | 株式会社岛津制作所 | Gas measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103149171B (en) | 2015-03-25 |
| JP5729285B2 (en) | 2015-06-03 |
| JP2013120058A (en) | 2013-06-17 |
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