CN113048510A - Automatic calibration system and method for flue gas emission - Google Patents
Automatic calibration system and method for flue gas emission Download PDFInfo
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- CN113048510A CN113048510A CN202110376093.8A CN202110376093A CN113048510A CN 113048510 A CN113048510 A CN 113048510A CN 202110376093 A CN202110376093 A CN 202110376093A CN 113048510 A CN113048510 A CN 113048510A
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- fuel ratio
- air
- automatic calibration
- flue gas
- emission
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000003546 flue gas Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000446 fuel Substances 0.000 claims abstract description 56
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 238000004868 gas analysis Methods 0.000 claims abstract description 15
- 239000000779 smoke Substances 0.000 claims abstract description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 14
- 239000003345 natural gas Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 8
- 229910002091 carbon monoxide Inorganic materials 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- ODUCDPQEXGNKDN-UHFFFAOYSA-N Nitrogen oxide(NO) Natural products O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
- F23N5/006—Systems for controlling combustion using detectors sensitive to combustion gas properties the detector being sensitive to oxygen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/44—Optimum control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2900/00—Special features of, or arrangements for controlling combustion
- F23N2900/05001—Measuring CO content in flue gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2900/00—Special features of, or arrangements for controlling combustion
- F23N2900/05002—Measuring CO2 content in flue gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2900/00—Special features of, or arrangements for controlling combustion
- F23N2900/05003—Measuring NOx content in flue gas
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention provides an automatic calibration system for smoke emission, which comprises: parameter setting means for configuring an original air-fuel ratio and setting a target emission value; the flue gas analysis device is used for acquiring real-time emission numerical values; the comparison device is used for comparing the real-time emission value with the target emission value to obtain a comparison result, and is connected with the parameter setting device and the flue gas analysis device; the automatic calibration device is used for forming a deviation signal according to the comparison result and is connected with the comparison device; and the combustion management device is used for storing the original air-fuel ratio and the target emission value, correcting the original air-fuel ratio into a new air-fuel ratio according to the received deviation signal, forming an adjusting instruction and is connected with the parameter setting device, the comparing device and the automatic calibration device. The invention has the beneficial effects that: the calibration process is automatically realized, manual operation is not needed, the calibration is convenient, and the efficiency is high.
Description
Technical Field
The invention relates to the field of flue gas emission, in particular to a system and a method for automatically calibrating flue gas emission.
Background
After the low-nitrogen combustor runs for a period of time, due to the reason of mechanical fatigue, adjusting valves such as an air valve and a gas valve of a low-nitrogen combustion actuating mechanism deviate more or less, the condition that the emission exceeds the standard can be caused by continuing controlling the air-fuel ratio when the emission reaches the standard, and once the condition occurs, the low-nitrogen combustor can only be debugged again by manpower.
Disclosure of Invention
The invention provides a system and a method for automatically calibrating smoke emission, which solve the problems in the prior art.
The technical scheme of the invention is realized as follows:
an automatic calibration system for flue gas emissions, comprising:
parameter setting means for configuring an original air-fuel ratio and setting a target emission value;
the flue gas analysis device is used for acquiring real-time emission numerical values;
the comparison device is used for comparing the real-time emission value with the target emission value to obtain a comparison result, and is connected with the parameter setting device and the flue gas analysis device;
the automatic calibration device is used for forming a deviation signal according to the comparison result and is connected with the comparison device;
and the combustion management device is used for storing the original air-fuel ratio and the target emission value, correcting the original air-fuel ratio into a new air-fuel ratio according to the received deviation signal, forming an adjusting instruction and is connected with the parameter setting device, the comparing device and the automatic calibration device.
Further, the automatic calibration system for flue gas emission of the present invention further comprises:
and the execution device is used for finishing corresponding adjusting actions according to the adjusting instructions and is connected with the combustion management device.
Further, the executing device comprises:
the air valve is used for adjusting the air quantity or the mixture ratio entering the combustor and adjusting the opening according to an adjusting instruction;
and the natural gas valve is used for adjusting the amount or the proportion of natural gas entering the combustor and adjusting the opening according to an adjusting instruction.
Preferably, the raw air-fuel ratio is configured with 10 air-fuel ratio data values.
An automatic calibration method for flue gas emission of the automatic calibration system for flue gas emission comprises the following steps:
s1, configuring an original air-fuel ratio and setting a target emission value;
s2, collecting real-time emission values;
s3, comparing the real-time emission value with the target emission value and obtaining a comparison result;
s4, forming a deviation signal according to the comparison result;
s5, correcting the original air-fuel ratio to a new air-fuel ratio according to the received deviation signal, and forming an adjusting instruction;
and S6, repeating the steps S2-S5 until the real-time emission value is less than or equal to the target emission value.
Preferably, the raw air-fuel ratio is configured with 10 air-fuel ratio data values.
Further, according to the automatic calibration method for smoke emission, each air-fuel ratio data value is automatically calibrated according to the steps S1-S6.
The invention has the beneficial effects that:
the automatic calibration system and the method for the smoke emission, provided by the invention, have the advantages that the calibration process is automatically realized, manual operation is not needed, the calibration is convenient, and the efficiency is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of an automatic calibration system for flue gas emission according to the present invention;
FIG. 2 is a display interface of a flue gas analysis device of the automatic calibration system for flue gas emission according to the present invention;
FIG. 3 is another display interface of the flue gas analyzing device of the automatic calibration system for flue gas emission according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, the automatic calibration system for flue gas emission according to the present invention comprises:
parameter setting means for configuring an original air-fuel ratio and setting a target emission value;
the flue gas analysis device is used for acquiring real-time emission numerical values;
the comparison device is used for comparing the real-time emission value with the target emission value to obtain a comparison result, and is connected with the parameter setting device and the flue gas analysis device;
the automatic calibration device is used for forming a deviation signal according to the comparison result and is connected with the comparison device;
and the combustion management device is used for storing the original air-fuel ratio and the target emission value, correcting the original air-fuel ratio into a new air-fuel ratio according to the received deviation signal, forming an adjusting instruction and is connected with the parameter setting device, the comparing device and the automatic calibration device.
Specifically, the air-fuel ratio is the ratio of the mass between air and fuel in the mixture; the burner can be installed and debugged when put into use, after debugging is completed, the configured original air-fuel ratio can be stored in the combustion management device, and the burner operates according to the original air-fuel ratio; the target emission value can be a value of national emission standard, or can be a value set according to actual needs.
The specific working principle is as follows: inputting an original air-fuel ratio and a target emission value through a parameter setting device, connecting a combustion management device with the parameter setting device, and storing the original air-fuel ratio and the target emission value by the parameter setting device; the device comprises a flue gas analysis device, a parameter setting device, a flue gas analysis device, a comparison device, an automatic calibration device and a combustion management device, wherein the flue gas analysis device collects and feeds back real-time emission values in real time, the parameter setting device and the flue gas analysis device are connected with the comparison device, the comparison device compares the real-time emission values with target emission values and obtains comparison results, the comparison device and the automatic calibration device form deviation signals according to the comparison results, the automatic calibration device is connected with the combustion management device, and the combustion management device corrects original air-fuel ratios into new air-fuel ratios according to the received deviation signals. The combustion management device adjusts the original air-fuel ratio to a new air-fuel ratio step by step according to the received deviation signal, namely, the process is repeated until the real-time emission value is less than or equal to the target emission value.
The automatic calibration system for flue gas emission provided by the invention can further comprise:
and the execution device is used for finishing corresponding adjusting actions according to the adjusting instructions and is connected with the combustion management device.
Wherein the execution device comprises:
the air valve is used for adjusting the air quantity or the mixture ratio entering the combustor and adjusting the opening according to an adjusting instruction;
and the natural gas valve is used for adjusting the amount or the proportion of natural gas entering the combustor and adjusting the opening according to an adjusting instruction.
Specifically, the air-fuel ratio of the burner is mainly achieved by adjusting the opening of the air valve and the opening of the natural gas valve.
Wherein, preferably, the original air-fuel ratio is configured with 10 air-fuel ratio data values. According to big data analysis and consideration of factors such as computational efficiency, 10 air-fuel ratio data values are generally configured for the raw air-fuel ratio, specifically:
| load (%) | Opening degree of air valve | Gas opening degree |
| 10 | 6.2 | 7.6 |
| 20 | 12.3 | 14.7 |
| 30 | 18.5 | 18.1 |
| 40 | 22.4 | 21.5 |
| 50 | 28.5 | 24.1 |
| 60 | 32.3 | 28.3 |
| 70 | 38.1 | 30.3 |
| 80 | 42.2 | 32.1 |
| 90 | 47.7 | 37.8 |
| 100 | 53.4 | 44 |
The automatic calibration system for the smoke emission, disclosed by the invention, can be used for respectively and automatically calibrating different load points in the working process. Taking the load point of 10% as an example:
when the load is 10%, the opening of the air valve is 6.2, the opening of the air valve is 7.6, and the feedback data of the flue gas analysis device at the moment are as follows:
oxygen content (O)2) 2.36% and carbon monoxide (CO) 14mg/m3Carbon dioxide (CO)2) 10.56% of Nitrogen Oxide (NO)X) Is 30mg/m3(ii) a Nitrogen Oxides (NO) when the target emission value is the national emission standardX)30mg/m3The following standards do not reach the standard, and the optimal value of the oxygen content is about 3.5%, the automatic calibration system for flue gas emission can automatically adjust and increase the opening of the air valve, increase the oxygen content and reduce nitrogen oxides.
After adjustment, when the load is 10%, the opening of the air valve is 6.8, the opening of the air valve is 7.6, and the feedback data of the flue gas analysis device at this time is as follows:
oxygen content (O)2) 3.09% and carbon monoxide (CO) 20mg/m3Carbon dioxide (CO)2) 10.15% of Nitrogen Oxide (NO)X) Is 27mg/m3(ii) a And (4) the emission reaches the standard, and debugging at the next load point is carried out until the debugging at all the load points is finished.
In the automatic calibration system for flue gas emission according to the present invention, the parameter setting device may include:
the original air-fuel ratio configuration module is used for configuring an original air-fuel ratio;
and the target emission value setting module is used for setting a target emission value.
The automatic calibration system for flue gas emission, provided by the invention, can further comprise a parameter setting device, wherein the parameter setting device comprises:
and the calibration frequency setting module is used for setting the calibration frequency and is connected with the comparison device and the combustion management device.
In particular, the combustion management device may also store the calibration frequency.
According to the automatic calibration system for flue gas emission, calibration frequency can be set according to actual conditions by setting the calibration frequency, transitional calibration is avoided, and calculation burden is reduced.
An automatic calibration method for flue gas emission of the automatic calibration system for flue gas emission comprises the following steps:
s1, configuring an original air-fuel ratio and setting a target emission value;
s2, collecting real-time emission values;
s3, comparing the real-time emission value with the target emission value and obtaining a comparison result;
s4, forming a deviation signal according to the comparison result;
s5, correcting the original air-fuel ratio to a new air-fuel ratio according to the received deviation signal, and forming an adjusting instruction;
and S6, repeating the steps S2-S5 until the real-time emission value is less than or equal to the target emission value.
Wherein, preferably, the original air-fuel ratio is configured with 10 air-fuel ratio data values.
Wherein each air-fuel ratio data value is automatically calibrated according to steps S1-S6.
The automatic calibration system and the method for the smoke emission, provided by the invention, have the advantages that the calibration process is automatically realized, manual operation is not needed, the calibration is convenient, and the efficiency is high.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. An automatic calibration system for flue gas emission, comprising:
parameter setting means for configuring an original air-fuel ratio and setting a target emission value;
the flue gas analysis device is used for acquiring real-time emission numerical values;
the comparison device is used for comparing the real-time emission value with the target emission value to obtain a comparison result, and is connected with the parameter setting device and the flue gas analysis device;
the automatic calibration device is used for forming a deviation signal according to the comparison result and is connected with the comparison device;
and the combustion management device is used for storing the original air-fuel ratio and the target emission value, correcting the original air-fuel ratio into a new air-fuel ratio according to the received deviation signal, forming an adjusting instruction and is connected with the parameter setting device, the comparing device and the automatic calibration device.
2. The automatic calibration system for flue gas emissions of claim 1, further comprising:
and the execution device is used for finishing corresponding adjusting actions according to the adjusting instructions and is connected with the combustion management device.
3. The system of claim 2, wherein the means for performing comprises:
the air valve is used for adjusting the air quantity or the mixture ratio entering the combustor and adjusting the opening according to an adjusting instruction;
and the natural gas valve is used for adjusting the amount or the proportion of natural gas entering the combustor and adjusting the opening according to an adjusting instruction.
4. The automatic calibration system for smoke emissions according to claim 1, wherein said raw air-fuel ratio is configured with 10 air-fuel ratio data values.
5. The automatic calibration method for the smoke emission of the automatic calibration system for the smoke emission according to any one of claims 1 to 4, comprising the following steps:
s1, configuring an original air-fuel ratio and setting a target emission value;
s2, collecting real-time emission values;
s3, comparing the real-time emission value with the target emission value and obtaining a comparison result;
s4, forming a deviation signal according to the comparison result;
s5, correcting the original air-fuel ratio to a new air-fuel ratio according to the received deviation signal, and forming an adjusting instruction;
and S6, repeating the steps S2-S5 until the real-time emission value is less than or equal to the target emission value.
6. The method of automatic calibration of smoke emissions according to claim 5, wherein said raw air-fuel ratio is configured with 10 air-fuel ratio data values.
7. The automatic calibration method for flue gas emissions according to claim 6, wherein each air-fuel ratio data value is automatically calibrated according to steps S1-S6.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115015488A (en) * | 2022-06-16 | 2022-09-06 | 华电电力科学研究院有限公司 | Online automatic accounting system and method for carbon emission of thermal generator set |
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