CN105092510B - A kind of Natural Gas Power Plant flue gas on-line continuous monitoring method and system - Google Patents
A kind of Natural Gas Power Plant flue gas on-line continuous monitoring method and system Download PDFInfo
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- CN105092510B CN105092510B CN201510468596.2A CN201510468596A CN105092510B CN 105092510 B CN105092510 B CN 105092510B CN 201510468596 A CN201510468596 A CN 201510468596A CN 105092510 B CN105092510 B CN 105092510B
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- flue gas
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- detection module
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 239000003546 flue gas Substances 0.000 title claims abstract description 48
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000003345 natural gas Substances 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 21
- 238000012937 correction Methods 0.000 claims abstract description 10
- 238000004587 chromatography analysis Methods 0.000 claims abstract description 8
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 26
- 238000005070 sampling Methods 0.000 claims description 19
- 239000000523 sample Substances 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 37
- 238000004458 analytical method Methods 0.000 description 8
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000003827 upregulation Effects 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention relates to a kind of Natural Gas Power Plant flue gas on-line continuous monitoring method and system, the method includes the steps：S1, acquisition natural gas combustion engine tail flue gas；S2, flue gas is passed through SO2Gas chamber is analyzed, spectrum analysis is carried out to the non-scatter infrared method of flue gas utilization, obtains SO2Content；S3, flue gas is passed through CH4Gas chamber is analyzed, chromatography is carried out to flue gas, obtains CH4Content；S4, by microcontroller internal processes, utilize CH4Content is to SO2Content carries out dynamic corrections.The Natural Gas Power Plant flue gas on-line continuous monitoring method of the present invention measures SO using non-scatter infrared absorption method2, CH is measured using red, orange, green, blue, yellow (ROGBY)4, utilize CH4Content is to SO2Content carries out dynamic corrections, can be to SO2CH under background4Gas is screened, and CH is eliminated4To SO2Interference, to realize to SO2Accurate measurement, measurement accuracy is higher.
Description
Technical field
The present invention relates to environment monitoring technology more particularly to a kind of Natural Gas Power Plant flue gas on-line continuous monitoring method be
System.
Background technology
As country is to the pay attention to day by day of environmental issue, newly put into effect《Fossil-fuel power plant atmospheric pollutant emission standard》To thermoelectricity
Factory's Air Pollutant Emission concentration limit has tightened up regulation, and the precision and accuracy to measuring instrument have higher want
It asks.Currently, being mainly monitored to the flue gas of discharge by on-line continuous monitoring system (hereinafter referred to as CEMS), CEMS systems
There are mainly three types of：Dilution method CEMS (using U.S.'s thermoelectron as representative)；Direct extraction CEMS (using European Siemens as representative,
Leading low level is also accounted in South Korea, Japanese the method) and be direct method of measurement CEMS originally, generally use infrared method to every pollutant
It carries out while measuring.What it is due to Natural Gas Power Plant burning is natural gas, and CEMS systems are to SO2Measurement there is exception, this be because
Be combustion engine rise machine and shut down when, unit burning it is insufficient, portion of methane gas leakage is had, moreover, Gas Generator Set is starting
Before have the natural gas purge time of 660s, its purpose is to make remaining air purging displacement in gas turbine chamber clean,
It avoids setting off an explosion because of natural gas and air mixing, and this strand of natural gas is excluded along flue from chimney, is at the same time also adopted
Sample enters analyzer, so as to cause that can generate interference to the measurement of sulfur dioxide containing methane in the background gas of CEMS analyses.But
It is that existing CEMS systems cannot accurately measure the content for analyzing methane, thus cannot be to the SO in gas pollutant2It carries out
It is accurate to measure,
In view of the above shortcomings, the designer, is actively subject to research and innovation, to found a kind of novel natural pneumoelectric
Factory's flue gas on-line continuous monitoring method and system makes it with more the utility value in industry.
Invention content
In order to solve the above technical problems, the object of the present invention is to provide a kind of Natural Gas Power Plant flue gas on-line continuous monitoring sides
Method and system, to be screened to the methane gas under sulfur dioxide background, Mobile state correction-compensation of going forward side by side is eliminated to titanium dioxide
The interference of sulphur.
The Natural Gas Power Plant flue gas on-line continuous monitoring method of the present invention, includes the following steps：
S1, acquisition natural gas combustion engine tail flue gas；
S2, flue gas is passed through SO2Gas chamber is analyzed, spectrum analysis is carried out to the non-scatter infrared method of flue gas utilization, obtains SO2Contain
Amount；
S3, flue gas is passed through CH4Gas chamber is analyzed, chromatography is carried out to flue gas, obtains CH4Content；
S4, by microcontroller internal processes, utilize CH4Content is to SO2Content carries out dynamic corrections.
The present invention also provides a kind of Natural Gas Power Plant flue gas on-line continuous monitoring system, including sequentially connected sampling are single
Member, processing unit and analytic unit, residing processing unit include the SO being connected2Detection module and CH4Detection module, the SO2
Detection module and CH4The output end of detection module is connect with the analytic unit respectively.
Further, the SO2Detection module carries out spectrum using non-scatter infrared method by spectroanalysis instrument to flue gas
Analysis, obtains SO2Content；The CH4Detection module carries out chromatography by chromatograph to flue gas, obtains CH4Content.
Further, the analytic unit is microcontroller, and the microcontroller utilizes CH by its internal processes4Content pair
SO2Content carries out dynamic corrections.
Further, the sampling unit includes sampling probe, provides the sampling probe sampling pump of draft.
Further, the sampling probe passes through filter and the SO2Detection module connects.
According to the above aspect of the present invention, the Natural Gas Power Plant flue gas on-line continuous monitoring method of the present invention utilizes non-scatter infrared absorption
Method measures SO2, CH is measured using red, orange, green, blue, yellow (ROGBY)4, utilize CH4Content is to SO2Content carries out dynamic corrections, can be to SO2Under background
CH4Gas is screened, and CH is eliminated4To SO2Interference, to realize to SO2Accurate measurement, measurement accuracy is higher.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, below with presently preferred embodiments of the present invention and after coordinating attached drawing to be described in detail such as.
Description of the drawings
Fig. 1 is flow chart of the method for the present invention；
Fig. 2 is the system block diagram of the present invention.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example is not limited to the scope of the present invention for illustrating the present invention.
Referring to Fig. 1, a kind of Natural Gas Power Plant flue gas on-line continuous monitoring method described in a preferred embodiment of the present invention, packet
Include following steps：
S1, acquisition natural gas combustion engine tail flue gas；
S2, flue gas is passed through SO2Gas chamber is analyzed, spectrum analysis is carried out to the non-scatter infrared method of flue gas utilization, obtains SO2Contain
Amount, the SO measured at this time2Content includes the interference of CH4；
S3, flue gas is passed through CH4Gas chamber is analyzed, chromatography is carried out to flue gas, obtains CH4Content；
S4, by microcontroller internal processes, utilize CH4Content is to SO2Content carries out dynamic corrections.
The measuring principle of Natural Gas Power Plant flue gas on-line continuous monitoring method of the present invention is：Because in infrared spectrum,
CH4And SO2There are certain overlapping regions, therefore measure SO with non-scatter infrared absorption method2, CH4Presence can be to SO2Content make
At interference, cause to measure inaccuracy, the present invention passes through to CH4Chromatography is carried out, according to the analysis indoor CH of gas4Amount of analysis pair
The SO finished after testing2Content carries out dynamic corrections, to accurately calculate SO2Content so that measurement result is accurate and reliable；In addition,
Microcontroller can also complete handling and exporting for signal Analysis, and the 4-20mA signals that signal Analysis is converted into standard export,
It is used for display and teletransmission.
Natural Gas Power Plant flue gas on-line continuous monitoring system provided by the invention, as shown in Fig. 2, being taken including sequentially connected
Sample unit, processing unit and analytic unit, processing unit include the SO being connected2Detection module and CH4Detection module, SO2Detection
Module and CH4The output end of detection module is connect with analytic unit respectively.
Specifically, SO2Detection module carries out spectrum analysis using non-scatter infrared method by spectroanalysis instrument to flue gas, obtains
Go out SO2Content；CH4Detection module carries out chromatography by chromatograph to flue gas, obtains CH4Content.Spectroanalysis instrument pair
SO2The signal Analysis of content is with chromatograph to CH4The signal Analysis of content is conveyed to analytic unit, is analyzed in the present invention
Unit is microcontroller, and microcontroller utilizes CH by its internal processes4Content is to SO2Content carries out dynamic corrections.
Sampling unit includes sampling probe, provides sampling probe the sampling pump of draft in the present invention, and sampling probe is used for
It stretches into and acquires flue gas in chimney, and sampling probe passes through filter and SO2Detection module connects, and is filtered in flue gas using filter
Impurity, the sampling probe such as particulate matter, dust and moisture filtered flue gas is sent to SO2SO in detection module2Analyze gas chamber
After detection, SO is detected2Flue gas after content is again by SO2Analysis gas chamber enters CH4The CH of detection module4It analyzes gas chamber and carries out CH4Contain
Amount detection.
The Natural Gas Power Plant smoke on-line monitoring system of the present invention passes through CH4Detection module, and by the accurate of microcontroller
It calculates, it can be to SO2CH under background4Gas is screened, Mobile state correction-compensation of going forward side by side, and is eliminated to SO2Interference, to real
Now to SO2Accurate measurement, measurement accuracy is higher.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of Natural Gas Power Plant flue gas on-line continuous monitoring method, which is characterized in that include the following steps：
S1, acquisition natural gas combustion engine tail flue gas；
S2, flue gas is passed through SO2Gas chamber is analyzed, spectrum analysis is carried out to the non-scatter infrared method of flue gas utilization, obtains SO2Content；
S3, flue gas is passed through CH4Gas chamber is analyzed, chromatography is carried out to flue gas, obtains CH4Content；
S4, by microcontroller internal processes, utilize CH4Content is to SO2Content carries out dynamic corrections.
2. a kind of Natural Gas Power Plant flue gas on-line continuous monitoring system, it is characterised in that：Including sequentially connected sampling unit, place
It includes the SO being connected to manage unit and analytic unit, residing processing unit2Detection module and CH4Detection module, the SO2Detection
Module and CH4The output end of detection module is connect with the analytic unit respectively, the SO2Detection module passes through spectroanalysis instrument
Spectrum analysis is carried out to flue gas using non-scatter infrared method, obtains SO2Content；The CH4Detection module passes through chromatograph pair
Flue gas carries out chromatography, obtains CH4Content, the analytic unit are microcontroller, and the microcontroller passes through its internal processes, profit
Use CH4Content is to SO2Content carries out dynamic corrections.
3. Natural Gas Power Plant flue gas on-line continuous monitoring system according to claim 2, it is characterised in that：The sampling is single
Member includes sampling probe, provides the sampling probe sampling pump of draft.
4. Natural Gas Power Plant flue gas on-line continuous monitoring system according to claim 3, it is characterised in that：The sampling is visited
Head passes through filter and the SO2Detection module connects.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510468596.2A CN105092510B (en) | 2015-08-03 | 2015-08-03 | A kind of Natural Gas Power Plant flue gas on-line continuous monitoring method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510468596.2A CN105092510B (en) | 2015-08-03 | 2015-08-03 | A kind of Natural Gas Power Plant flue gas on-line continuous monitoring method and system |
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| Publication Number | Publication Date |
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| CN105092510A CN105092510A (en) | 2015-11-25 |
| CN105092510B true CN105092510B (en) | 2018-08-31 |
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| CN108037236B (en) * | 2017-11-21 | 2023-03-03 | 中国科学院西北生态环境资源研究院 | Experimental device for collecting quantitative analysis gas of methane conversion rate in torch discharge |
| CN112816652B (en) * | 2021-02-23 | 2024-09-13 | 国能南京电力试验研究有限公司 | Device for testing fuel oxidation rate and carbon emission of combustion engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1885008A (en) * | 2006-07-04 | 2006-12-27 | 王健 | Method and system for monitoring continuous exhaust of smoke |
| CN202083635U (en) * | 2011-05-23 | 2011-12-21 | 绵阳富源石油科技有限责任公司 | Gas analyzer for petroleum and gas |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6995360B2 (en) * | 2003-05-23 | 2006-02-07 | Schlumberger Technology Corporation | Method and sensor for monitoring gas in a downhole environment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1885008A (en) * | 2006-07-04 | 2006-12-27 | 王健 | Method and system for monitoring continuous exhaust of smoke |
| CN202083635U (en) * | 2011-05-23 | 2011-12-21 | 绵阳富源石油科技有限责任公司 | Gas analyzer for petroleum and gas |
Non-Patent Citations (1)
| Title |
|---|
| 烟气连续排放监测系统及其应用;郭章顺 等;《石油化工自动化》;20031231;第76-78、90页 * |
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