CN116592386A - Flue gas oxygen content control system - Google Patents
Flue gas oxygen content control system Download PDFInfo
- Publication number
- CN116592386A CN116592386A CN202310607610.7A CN202310607610A CN116592386A CN 116592386 A CN116592386 A CN 116592386A CN 202310607610 A CN202310607610 A CN 202310607610A CN 116592386 A CN116592386 A CN 116592386A
- Authority
- CN
- China
- Prior art keywords
- biomass boiler
- flue gas
- time period
- specified time
- combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 171
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 171
- 239000001301 oxygen Substances 0.000 title claims abstract description 171
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 239000003546 flue gas Substances 0.000 title claims abstract description 141
- 239000002028 Biomass Substances 0.000 claims abstract description 257
- 238000002485 combustion reaction Methods 0.000 claims abstract description 231
- 238000012544 monitoring process Methods 0.000 claims abstract description 20
- 238000011156 evaluation Methods 0.000 claims description 84
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 15
- 239000000779 smoke Substances 0.000 claims description 9
- 230000003827 upregulation Effects 0.000 claims description 9
- 230000003828 downregulation Effects 0.000 claims description 8
- 238000012797 qualification Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000033228 biological regulation Effects 0.000 claims description 4
- 206010021143 Hypoxia Diseases 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 15
- 230000002222 downregulating effect Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/002—Regulating air supply or draught using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2239/00—Fuels
- F23N2239/02—Solid fuels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- 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 application discloses a flue gas oxygen content control system, and relates to the technical field of biomass boiler management; the system comprises an oxygen monitoring module, a combustion state parameter acquisition module, a combustion state analysis module, a combustion type analysis module, a blower wind speed acquisition module, a blower accuracy analysis module, a combustion condition adjustment module and an early warning terminal; the combustion type corresponding to the target biomass boiler is confirmed by monitoring the oxygen concentration in the flue gas discharged by the chimney in the target biomass boiler, the wind speed of the blower is regulated according to the accuracy of the wind speed of the blower of the target biomass boiler, the defects existing in the prior art are overcome, the intelligent and automatic control of the oxygen concentration of the flue gas of the biomass boiler is realized, the proper supply of oxygen of the biomass boiler during combustion is ensured, the combustion efficiency and effect of the biomass boiler are further improved, and the loss of heat energy in the biomass boiler is reduced.
Description
Technical Field
The application relates to the technical field of biomass boiler management, in particular to a flue gas oxygen content control system.
Background
The biomass boiler takes biomass energy as fuel, has the advantages of energy conservation, environmental protection and the like, when the biomass fuel burns in the combustion chamber, the air blower is required to blow in air for supplying oxygen, the temperature of the combustion chamber can be reduced by excessive supplied oxygen, part of heat is dispersed at the same time, excessive oxygen is discharged through the chimney, the supplied oxygen is too little, the biomass in the combustion chamber is not fully combusted, and meanwhile, the oxygen content in the flue gas in the chimney is reduced, so that the oxygen content in the flue gas discharged by the chimney needs to be monitored and controlled in order to ensure the combustion effect of the biomass fuel.
The prior art is as disclosed in the Chinese patent application of application publication No. CN112610979A, and the environment-friendly energy-saving control system for the biomass boiler is mainly used for controlling fuel supply and oxygen supply in the biomass boiler according to the environment temperature by detecting the environment temperature and the temperature in the biomass boiler, and detecting the smoke content, the carbon dioxide content and the carbon monoxide content in smoke at the same time, so as to judge whether the fuel in the biomass boiler is fully combusted or not, thereby controlling the feeding speed of the biomass fuel and the oxygen supply speed during combustion, and further enabling the fuel to be fully combusted.
Aiming at the scheme, the inventor considers that the supply speed of the biomass fuel is continuously changed, so that the loss and the fault of a biomass fuel conveyor belt are easy to be caused, and the operation of a biomass boiler is further influenced; the accuracy of the oxygen supply cannot be effectively guaranteed due to the fact that the feeding speed and the oxygen supply speed are changed simultaneously; meanwhile, the oxygen content in the smoke reflects the combustion condition of biomass, the oxygen content in the smoke is not monitored, and the heat energy loss caused by excessive oxygen supply cannot be eliminated; on the other hand, the oxygen supply to the biomass boiler requires the control of the blower, and the accuracy of the blower affects the accuracy of the oxygen supply amount, so that the accuracy of the blower needs to be considered when the oxygen supply speed is controlled.
Disclosure of Invention
To solve the above problems; the application aims to provide a flue gas oxygen content control system.
In order to solve the technical problems, the application adopts the following technical scheme: a flue gas oxygen content control system comprising: the oxygen monitoring module is used for monitoring the oxygen concentration in the flue gas of the target biomass boiler at each monitoring time point in the specified time period and judging the qualification of the oxygen concentration in the flue gas of the target biomass boiler corresponding to the specified time period.
And the combustion state parameter acquisition module is used for acquiring the combustion state parameters of the target biomass boiler corresponding to the specified time period when the oxygen concentration in the flue gas in the specified time period is unqualified.
The combustion state analysis module is used for analyzing the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period according to the oxygen concentration and the combustion state parameter of the flue gas corresponding to the specified time period of the target biomass boiler.
The combustion type analysis module is used for analyzing the combustion type corresponding to the target biomass boiler according to the combustion state evaluation coefficient corresponding to the target biomass boiler, wherein the combustion state comprises an oxygen over-supply type, an oxygen insufficient type and a normal combustion type.
The combustion condition adjusting module is used for analyzing combustion condition adjusting and controlling information of the target biomass boiler corresponding to the specified time period according to the combustion state evaluation coefficient and the combustion type of the target biomass boiler corresponding to the specified time period and correspondingly adjusting, wherein the combustion condition adjusting and controlling information comprises an actual air speed down-regulating value of the blower and an actual air speed up-regulating value of the blower.
Preferably, the judging target biomass boiler is qualified in the concentration of oxygen in the flue gas in a specified time period, and the specific judging process is as follows: and summing the oxygen concentration in the flue gas of the target biomass boiler at each monitoring time point in the specified time period, and calculating the average value to obtain the average oxygen concentration in the flue gas of the target biomass boiler corresponding to the specified time period, wherein the average oxygen concentration is used as the oxygen concentration in the flue gas of the target biomass boiler corresponding to the specified time period.
Comparing the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period with the set reference flue gas oxygen concentration interval, and if the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is larger than the upper limit value of the set reference flue gas oxygen concentration interval or smaller than the lower limit value of the set reference flue gas oxygen concentration interval, judging that the target biomass boiler is unqualified in the flue gas corresponding to the specified time period.
Preferably, the combustion state parameters include combustion temperature of the combustion chamber, concentration of carbon monoxide in the flue gas and flue gas flow rate.
Preferably, the combustion state evaluation coefficient corresponding to the analysis target biomass boiler in the specified time period is specifically analyzed as follows: if the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is greater than the upper limit value of the oxygen concentration range in the set reference flue gas, the calculation formula is adoptedObtaining a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period +.>Therein, T, O 2 V respectively represents the combustion temperature of a combustion chamber, the oxygen concentration in the flue gas and the flue gas flow rate of the target biomass boiler corresponding to a specified time period, T 'and V' respectively represent the preset standard combustion temperature of the combustion chamber and the standard flow rate of the flue gas, O 2max An oxygen concentration upper limit value epsilon representing an oxygen concentration interval in reference flue gas 1 、ε 2 、ε 3 Respectively set weight factors corresponding to the combustion temperature of the combustion chamber, the concentration of oxygen in the flue gas and the flow of the flue gas.
If the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is smaller than the lower limit value of the oxygen concentration range in the set reference flue gas, a calculation formula is adoptedObtaining a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period +.>Wherein the CO target biomass boiler has the concentration of carbon monoxide in the flue gas corresponding to the specified time period, O 2min Referring to the lower limit value of the oxygen concentration in the oxygen concentration interval in the flue gas, CO' is the preset carbon monoxide concentration in the allowable flue gas, and gamma 1 、γ 2 、γ 3 Respectively set weight factors corresponding to the combustion temperature evaluation coefficient of the combustion chamber, the oxygen concentration evaluation coefficient in the flue gas and the carbon monoxide concentration evaluation coefficient in the flue gas.
Preferably, the specific analysis process of the combustion type corresponding to the analysis target biomass boiler is as follows: when the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is larger than the oxygen concentration upper limit value of the set reference flue gas oxygen concentration interval, comparing the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period with a preset first combustion state evaluation coefficient threshold value, if the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period is larger than the preset first combustion state evaluation coefficient threshold value, judging that the combustion type corresponding to the target biomass boiler is the oxygen over-supply type, otherwise, judging that the combustion type corresponding to the target biomass boiler is the normal combustion type.
When the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is smaller than the lower limit value of the oxygen concentration range in the set reference flue gas, comparing the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period with a preset second combustion state evaluation coefficient threshold, if the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period is larger than the preset second combustion state evaluation coefficient threshold, judging that the combustion type corresponding to the target biomass boiler is the oxygen deficiency type, otherwise, judging that the combustion type corresponding to the target biomass boiler is the normal combustion type.
Preferably, the biomass boiler further comprises a blower wind speed acquisition module, wherein the blower wind speed acquisition module is used for acquiring the actual wind speed of the blower corresponding to the specified time period of the target biomass boiler.
Preferably, the system further comprises a blower accuracy analysis module, wherein the blower accuracy analysis module is used for acquiring a blower standard wind speed corresponding to the target biomass boiler, and further analyzing the accuracy of the blower wind speed of the target biomass boiler.
Preferably, the accuracy of the air speed of the target biomass boiler blower is analyzed, and the specific analysis process is as follows: substituting the actual air speed of the blower and the standard air speed of the blower corresponding to the target biomass boiler in the specified time period into a calculation formulaObtaining the accuracy kappa of the air speed of a target biomass boiler blower, wherein v 1 ′、v 1 Respectively representing the standard air speed of the air blower corresponding to the target biomass boiler and the actual air speed of the air blower corresponding to the designated time period, wherein eta is a correction factor corresponding to the accuracy of the set air speed of the air blower.
Preferably, the specific analysis process of the combustion condition regulation information corresponding to the analysis target biomass boiler in the specified time period is as follows: when the combustion type corresponding to the target biomass boiler is the oxygen over-supply type, subtracting a preset first combustion state evaluation coefficient threshold value from a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period to obtain a first combustion state evaluation coefficient difference corresponding to the target biomass boiler in the specified time period, comparing the first combustion state evaluation coefficient difference with a preset blower standard wind speed down-regulating value corresponding to each first combustion state evaluation coefficient difference to obtain a blower standard wind speed down-regulating value corresponding to the target biomass boiler in the specified time period, and calculating to obtain a blower actual wind speed down-regulating value corresponding to the specified time period of the target biomass boiler according to the accuracy of the blower wind speed of the target biomass boiler.
When the corresponding combustion type of the target biomass boiler is insufficient oxygen, subtracting a preset second combustion state evaluation coefficient threshold value from a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period to obtain a second combustion state evaluation coefficient difference corresponding to the target biomass boiler in the specified time period, comparing the second combustion state evaluation coefficient difference with a preset blower standard wind speed up-regulation value corresponding to each second combustion state evaluation coefficient difference to obtain a blower standard wind speed up-regulation value corresponding to the target biomass boiler in the specified time period, and calculating to obtain a blower actual wind speed up-regulation value corresponding to the target biomass boiler in the specified time period according to the accuracy of the blower wind speed of the target biomass boiler.
Preferably, the system further comprises an early warning terminal, wherein the early warning terminal is used for carrying out early warning prompt when the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is unqualified and the combustion type of the target biomass boiler corresponding to the specified time period is a normal combustion type.
Compared with the prior art, the application has the beneficial effects that:
1. the application provides a flue gas oxygen content control system, which monitors the oxygen concentration in flue gas discharged by a chimney in a target biomass boiler, further analyzes the combustion state evaluation coefficient of the target biomass boiler corresponding to the designated time period according to the oxygen concentration and the combustion state parameter of the flue gas corresponding to the designated time period of the target biomass boiler, thereby confirming the corresponding combustion type of the target biomass boiler, analyzing the accuracy of the air speed of a blower of the target biomass boiler, analyzing the regulation condition of the air speed of the blower corresponding to the designated time period of the target biomass boiler, solving the defects in the prior art, realizing the intelligent and automatic control of the oxygen concentration of the flue gas of the biomass boiler, ensuring the proper oxygen supply during the combustion of the biomass boiler, further improving the combustion efficiency and effect of the biomass boiler, and reducing the heat energy loss and the electric quantity loss of the blower in the biomass boiler.
2. According to the application, the combustion state evaluation coefficient in the target biomass boiler is analyzed in the combustion state analysis module, so that a reference is provided for the subsequent analysis of the combustion type in the target biomass boiler, the sufficiency of the biomass fuel in combustion is ensured, and the waste caused by excessive oxygen is reduced.
3. According to the application, the accuracy of the air speed control result of the air blower is greatly improved by analyzing the accuracy of the air speed of the air blower in the target biomass boiler in the air blower accuracy analysis module, so that the accuracy of oxygen supply in the biomass boiler is further ensured, and the utilization rate of biomass fuel in the biomass boiler is further improved.
4. According to the application, the combustion condition adjusting module analyzes the down-regulation value of the actual air speed of the air blower and the up-regulation value of the actual air speed of the air blower in the target biomass boiler, so that the control is further carried out, the reliability of the air speed control of the air blower is effectively ensured, and meanwhile, the intelligent effect of the operation of the biomass boiler is also improved.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram showing the connection of the system modules according to the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, the application provides a flue gas oxygen content control system, which comprises an oxygen monitoring module, a combustion state parameter acquisition module, a combustion state analysis module, a combustion type analysis module, a blower wind speed acquisition module, a blower accuracy analysis module, a combustion condition adjustment module and an early warning terminal.
The combustion state parameter acquisition module is respectively connected with the oxygen monitoring module and the combustion state analysis module, the combustion type analysis module is respectively connected with the combustion state analysis module, the combustion condition adjustment module and the early warning terminal, and the blower accuracy analysis module is respectively connected with the blower wind speed acquisition module and the combustion condition adjustment module.
A flue gas oxygen content control system comprising: the oxygen monitoring module is used for monitoring the oxygen concentration in the flue gas of the target biomass boiler at each monitoring time point in the specified time period and judging the qualification of the oxygen concentration in the flue gas of the target biomass boiler corresponding to the specified time period.
In the above, the oxygen sensor is installed at the top of the chimney of the target biomass boiler, and the specified time period is divided into the monitoring time points according to the preset time length, and then the oxygen concentration of the flue gas of the target biomass boiler at the monitoring time points in the specified time period is collected through the oxygen sensor.
In a specific embodiment, the qualification of the oxygen concentration in the flue gas corresponding to the specified time period of the target biomass boiler is judged, and the specific judgment process is as follows: and summing the oxygen concentration in the flue gas of the target biomass boiler at each monitoring time point in the specified time period, and calculating the average value to obtain the average oxygen concentration in the flue gas of the target biomass boiler corresponding to the specified time period, wherein the average oxygen concentration is used as the oxygen concentration in the flue gas of the target biomass boiler corresponding to the specified time period.
Comparing the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period with the set reference flue gas oxygen concentration interval, and if the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is larger than the upper limit value of the set reference flue gas oxygen concentration interval or smaller than the lower limit value of the set reference flue gas oxygen concentration interval, judging that the target biomass boiler is unqualified in the flue gas corresponding to the specified time period.
And the combustion state parameter acquisition module is used for acquiring the combustion state parameters of the target biomass boiler corresponding to the specified time period when the oxygen concentration in the flue gas in the specified time period is unqualified.
In the above description, the combustion state parameters include the combustion temperature of the combustion chamber, the concentration of carbon monoxide in the flue gas and the flow rate of the flue gas.
In a specific embodiment, the combustion state parameters corresponding to the specified time period of the target biomass boiler are collected, and the specific collection process is as follows: acquiring the temperature of a combustion chamber corresponding to each acquisition time point of a target biomass boiler in a specified time period from a target biomass boiler control center, and further averaging the temperature of the combustion chamber corresponding to each acquisition time point of the target biomass boiler in the specified time period by summation to obtain the average temperature of the combustion chamber corresponding to the target biomass boiler in the specified time period, wherein the average temperature is used as the combustion temperature of the combustion chamber corresponding to the target biomass boiler in the specified time period; installing a carbon monoxide sensor at the top of a chimney of the target biomass boiler, collecting carbon monoxide concentration in the flue gas corresponding to each monitoring time point of the target biomass boiler in a specified time period through the carbon monoxide sensor, and obtaining the average carbon monoxide concentration in the flue gas corresponding to the target biomass boiler in the specified time period through average calculation, wherein the average carbon monoxide concentration is used as the carbon monoxide concentration in the flue gas corresponding to the target biomass boiler in the specified time period; the gas flow sensor is arranged at the top of the chimney of the target biomass boiler, so that the total gas flow of the target biomass boiler in the flue gas corresponding to the specified time period is collected through the gas flow sensor, and the total gas flow is used as the flue gas flow of the target biomass boiler corresponding to the specified time period.
The combustion state analysis module is used for analyzing the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period according to the oxygen concentration and the combustion state parameter of the flue gas corresponding to the specified time period of the target biomass boiler.
In a specific embodiment, the combustion state evaluation coefficient corresponding to the specific time period of the target biomass boiler is analyzed, and the specific analysis process is as follows: if the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is greater than the upper limit value of the oxygen concentration range in the set reference flue gas, the calculation formula is adoptedObtaining the combustion state evaluation corresponding to the target biomass boiler in the specified time periodEstimate coefficient->Therein, T, O 2 V respectively represents the combustion temperature of a combustion chamber, the oxygen concentration in the flue gas and the flue gas flow rate of the target biomass boiler corresponding to a specified time period, T 'and V' respectively represent the preset standard combustion temperature of the combustion chamber and the standard flow rate of the flue gas, O 2max An oxygen concentration upper limit value epsilon representing an oxygen concentration interval in reference flue gas 1 、ε 2 、ε 3 Respectively set weight factors corresponding to the combustion temperature of the combustion chamber, the concentration of oxygen in the flue gas and the flow of the flue gas.
When the concentration of oxygen in the flue gas is too high, the oxygen blown into the target biomass boiler may be excessive, and when the oxygen is excessive, the temperature in the combustion chamber is reduced, and a large amount of flue gas is generated, so that analysis of the combustion temperature and the flue gas flow in the combustion chamber is required.
If the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is smaller than the lower limit value of the oxygen concentration range in the set reference flue gas, a calculation formula is adoptedObtaining a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period +.>Wherein the CO target biomass boiler has the concentration of carbon monoxide in the flue gas corresponding to the specified time period, O 2min Referring to the lower limit value of the oxygen concentration in the oxygen concentration interval in the flue gas, CO' is the preset carbon monoxide concentration in the allowable flue gas, and gamma 1 、γ 2 、γ 3 Respectively set weight factors corresponding to the combustion temperature evaluation coefficient of the combustion chamber, the oxygen concentration evaluation coefficient in the flue gas and the carbon monoxide concentration evaluation coefficient in the flue gas.
When the concentration of oxygen in the flue gas is too low, the oxygen blown into the target biomass boiler may be insufficient, which may cause insufficient combustion of biomass in the target biomass boiler, and not only may the combustion temperature of the combustion chamber not be increased, but also a large amount of carbon monoxide may be generated, so that analysis of the combustion temperature in the combustion chamber and the concentration of carbon monoxide in the flue gas is required.
According to the application, the combustion state evaluation coefficient in the target biomass boiler is analyzed in the combustion state analysis module, so that a reference is provided for the subsequent analysis of the combustion type in the target biomass boiler, the sufficiency of the biomass fuel in combustion is ensured, and the waste caused by excessive oxygen is reduced.
The combustion type analysis module is used for analyzing the combustion type corresponding to the target biomass boiler according to the combustion state evaluation coefficient corresponding to the target biomass boiler, wherein the combustion state comprises an oxygen over-supply type, an oxygen insufficient type and a normal combustion type.
In a specific embodiment, the combustion type corresponding to the target biomass boiler is analyzed, and the specific analysis process is as follows: when the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is larger than the oxygen concentration upper limit value of the set reference flue gas oxygen concentration interval, comparing the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period with a preset first combustion state evaluation coefficient threshold value, if the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period is larger than the preset first combustion state evaluation coefficient threshold value, judging that the combustion type corresponding to the target biomass boiler is the oxygen over-supply type, otherwise, judging that the combustion type corresponding to the target biomass boiler is the normal combustion type.
When the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is smaller than the lower limit value of the oxygen concentration range in the set reference flue gas, comparing the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period with a preset second combustion state evaluation coefficient threshold, if the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period is larger than the preset second combustion state evaluation coefficient threshold, judging that the combustion type corresponding to the target biomass boiler is the oxygen deficiency type, otherwise, judging that the combustion type corresponding to the target biomass boiler is the normal combustion type.
The air blower air speed acquisition module is used for acquiring the actual air speed of the air blower corresponding to the specified time period of the target biomass boiler.
The method is characterized in that an air speed sensor is arranged at an air outlet of an air blower of the target biomass boiler, then the air speed sensor is used for collecting the actual air speeds of the air blowers corresponding to all monitoring time points of the target biomass boiler in a specified time period, and the actual average air speeds of the air blowers corresponding to the target biomass boiler in the specified time period are obtained through average calculation and are used as the actual air speeds of the air blowers corresponding to the target biomass boiler in the specified time period.
The blower accuracy analysis module is used for acquiring a blower standard wind speed corresponding to the target biomass boiler, and further analyzing the accuracy of the blower wind speed of the target biomass boiler.
In the above, the standard air speed of the blower corresponding to the target biomass boiler is obtained from the control center of the target biomass boiler.
It should be noted that the standard wind speed of the blower is a preset wind speed of the blower.
In a specific embodiment, the accuracy of the target biomass boiler blower wind speed is analyzed, and the specific analysis process is as follows: substituting the actual air speed of the blower and the standard air speed of the blower corresponding to the target biomass boiler in the specified time period into a calculation formulaObtaining the accuracy kappa of the air speed of a target biomass boiler blower, wherein v 1 ′、v 1 Respectively representing the standard air speed of the air blower corresponding to the target biomass boiler and the actual air speed of the air blower corresponding to the designated time period, wherein eta is a correction factor corresponding to the accuracy of the set air speed of the air blower.
According to the application, the accuracy of the air speed control result of the air blower is greatly improved by analyzing the accuracy of the air speed of the air blower in the target biomass boiler in the air blower accuracy analysis module, so that the accuracy of oxygen supply in the biomass boiler is further ensured, and the utilization rate of biomass fuel in the biomass boiler is further improved.
The combustion condition adjusting module is used for analyzing combustion condition adjusting and controlling information of the target biomass boiler corresponding to the specified time period according to the combustion state evaluation coefficient and the combustion type of the target biomass boiler corresponding to the specified time period and correspondingly adjusting, wherein the combustion condition adjusting and controlling information comprises an actual air speed down-regulating value of the blower and an actual air speed up-regulating value of the blower.
It should be noted that, the conveying speed of the biomass fuel conveyor belt corresponding to the target biomass boiler is fixed, and the type, the water content and the conveying weight of the biomass fuel are fixed.
In a specific embodiment, the combustion condition regulation information corresponding to the target biomass boiler in the specified time period is analyzed, and the specific analysis process is as follows: when the combustion type corresponding to the target biomass boiler is the oxygen over-supply type, subtracting a preset first combustion state evaluation coefficient threshold value from a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period to obtain a first combustion state evaluation coefficient difference corresponding to the target biomass boiler in the specified time period, and comparing the first combustion state evaluation coefficient difference with a preset blower standard wind speed down-regulation value corresponding to each first combustion state evaluation coefficient difference to obtain a blower standard wind speed down-regulation value corresponding to the target biomass boiler in the specified time period, wherein the blower standard wind speed down-regulation value is recorded as Deltav 1 ' and substituting the accuracy of the air speed of the target biomass boiler blower into a calculation formula Deltav 1 ＝Δv 1 In the '1+kappa', obtaining the actual air speed down-regulating value Deltav of the blower corresponding to the target biomass boiler in the specified time period 1 。
When the combustion type corresponding to the target biomass boiler is insufficient in oxygen, subtracting a preset second combustion state evaluation coefficient threshold value from a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period to obtain a second combustion state evaluation coefficient difference corresponding to the target biomass boiler in the specified time period, and further performing an up-regulation value of a standard air speed of the air blower corresponding to each preset second combustion state evaluation coefficient differenceComparing, obtaining the standard air speed up-regulating value of the blower corresponding to the target biomass boiler in the specified time period, and recording the standard air speed up-regulating value as Deltav' 2 Substituting the accuracy of the air speed of the target biomass boiler blower into a calculation formula Deltav 2 ＝Δv′ 2 * In (1+kappa), obtaining the actual air speed up-regulating value Deltav of the blower corresponding to the specified time period of the target biomass boiler 2 。
According to the application, the combustion condition adjusting module analyzes the down-regulation value of the actual air speed of the air blower and the up-regulation value of the actual air speed of the air blower in the target biomass boiler, so that the control is further carried out, the reliability of the air speed control of the air blower is effectively ensured, and meanwhile, the intelligent effect of the operation of the biomass boiler is also improved.
The early warning terminal is used for carrying out early warning prompt when the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is unqualified and the combustion type of the target biomass boiler corresponding to the specified time period is a normal combustion type.
According to the application, the early warning terminal is used for carrying out early warning prompt, so that workers are timely reminded to check the biomass boiler, and the problem of the biomass boiler is prevented, thereby influencing the heat supply effect of the biomass boiler.
According to the embodiment of the application, the oxygen concentration in the flue gas discharged by the chimney in the target biomass boiler is monitored, and then the combustion state evaluation coefficient of the target biomass boiler corresponding to the flue gas in the specified time period is analyzed according to the oxygen concentration and the combustion state parameter of the target biomass boiler corresponding to the specified time period, so that the combustion type of the target biomass boiler is confirmed, the accuracy of the air speed of the air blower of the target biomass boiler is analyzed, the condition of adjusting the air speed of the air blower of the target biomass boiler corresponding to the specified time period is analyzed, the defects in the prior art are overcome, the intelligent and automatic control of the oxygen concentration in the flue gas of the biomass boiler is realized, the proper oxygen supply of the biomass boiler during combustion is ensured, the combustion efficiency and effect of the biomass boiler are further improved, and the heat energy loss in the biomass boiler and the electric quantity loss of the air blower are reduced.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. Flue gas oxygen content control system, characterized by includes:
the oxygen monitoring module is used for monitoring the oxygen concentration in the flue gas of the target biomass boiler at each monitoring time point in the specified time period and judging the qualification of the oxygen concentration in the flue gas of the target biomass boiler corresponding to the specified time period;
the combustion state parameter acquisition module is used for acquiring combustion state parameters corresponding to the target biomass boiler in the appointed time period when the oxygen concentration in the flue gas in the appointed time period is unqualified;
the combustion state analysis module is used for analyzing a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period according to the oxygen concentration and the combustion state parameter of the flue gas corresponding to the target biomass boiler in the specified time period;
the combustion type analysis module is used for analyzing the combustion type corresponding to the target biomass boiler according to the combustion state evaluation coefficient corresponding to the target biomass boiler, wherein the combustion state comprises an oxygen over-supply type, an oxygen insufficient type and a normal combustion type;
the combustion condition adjusting module is used for analyzing the combustion condition adjusting and controlling information of the target biomass boiler corresponding to the specified time period according to the combustion state evaluation coefficient and the combustion type of the target biomass boiler corresponding to the specified time period and correspondingly adjusting the combustion condition adjusting and controlling information.
2. The system for controlling oxygen content in flue gas according to claim 1, wherein the determining the qualification of the oxygen concentration in the flue gas of the target biomass boiler in the specified time period comprises the following specific determining process:
summing the oxygen concentration in the flue gas of the target biomass boiler at each monitoring time point in a specified time period, and calculating the average value to obtain the average oxygen concentration in the flue gas of the target biomass boiler corresponding to the specified time period, wherein the average oxygen concentration is used as the oxygen concentration in the flue gas of the target biomass boiler corresponding to the specified time period;
comparing the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period with the set reference flue gas oxygen concentration interval, and if the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is larger than the upper limit value of the set reference flue gas oxygen concentration interval or smaller than the lower limit value of the set reference flue gas oxygen concentration interval, judging that the target biomass boiler is unqualified in the flue gas corresponding to the specified time period.
3. The smoke oxygen control system of claim 2 wherein the combustion state parameters include combustor combustion temperature, carbon monoxide concentration in the smoke and smoke flow rate.
4. The flue gas oxygen content control system according to claim 3, wherein the combustion state evaluation coefficient corresponding to the analysis target biomass boiler in the specified time period is specifically analyzed as follows: if the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is greater than the upper limit value of the oxygen concentration range in the set reference flue gas, the calculation formula is adoptedObtaining a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period +.>Therein, T, O 2 V respectively represents the combustion temperature of a combustion chamber, the oxygen concentration in the flue gas and the flue gas flow rate of the target biomass boiler corresponding to a specified time period, T 'and V' respectively represent the preset standard combustion temperature of the combustion chamber and the standard flow rate of the flue gas, O 2max Oxygen representing the oxygen concentration interval in a reference flue gasConcentration upper limit value epsilon 1 、ε 2 、ε 3 Respectively setting weight factors corresponding to the combustion temperature of the combustion chamber, the oxygen concentration in the flue gas and the flue gas flow;
if the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is smaller than the lower limit value of the oxygen concentration range in the set reference flue gas, a calculation formula is adoptedObtaining a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period +.>Wherein the CO target biomass boiler has the concentration of carbon monoxide in the flue gas corresponding to the specified time period, O 2min Referring to the lower limit value of the oxygen concentration in the oxygen concentration interval in the flue gas, CO' is the preset carbon monoxide concentration in the allowable flue gas, and gamma 1 、γ 2 、γ 3 Respectively set weight factors corresponding to the combustion temperature evaluation coefficient of the combustion chamber, the oxygen concentration evaluation coefficient in the flue gas and the carbon monoxide concentration evaluation coefficient in the flue gas.
5. The system for controlling oxygen content in flue gas according to claim 4, wherein the specific analysis process is as follows:
when the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is larger than the oxygen concentration upper limit value of the set reference flue gas oxygen concentration interval, comparing the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period with a preset first combustion state evaluation coefficient threshold value, if the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period is larger than the preset first combustion state evaluation coefficient threshold value, judging that the combustion type corresponding to the target biomass boiler is the oxygen over-supply type, otherwise, judging that the combustion type corresponding to the target biomass boiler is the normal combustion type;
when the oxygen concentration of the target biomass boiler in the flue gas corresponding to the specified time period is smaller than the lower limit value of the oxygen concentration range in the set reference flue gas, comparing the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period with a preset second combustion state evaluation coefficient threshold, if the combustion state evaluation coefficient of the target biomass boiler corresponding to the specified time period is larger than the preset second combustion state evaluation coefficient threshold, judging that the combustion type corresponding to the target biomass boiler is the oxygen deficiency type, otherwise, judging that the combustion type corresponding to the target biomass boiler is the normal combustion type.
6. The flue gas oxygen content control system of claim 5, further comprising a blower wind speed acquisition module for acquiring a blower actual wind speed corresponding to the target biomass boiler in the specified time period.
7. The system of claim 6, further comprising a blower accuracy analysis module, wherein the blower accuracy analysis module is configured to obtain a standard blower wind speed corresponding to the target biological hot water boiler, and further analyze the accuracy of the blower wind speed of the target biological hot water boiler.
8. The flue gas oxygen content control system according to claim 7, wherein the accuracy of the target biological hot water boiler blower wind speed is analyzed, and the specific analysis process is as follows:
substituting the actual air speed of the blower and the standard air speed of the blower corresponding to the target biomass boiler in the specified time period into a calculation formulaObtaining the accuracy kappa of the air speed of the air blower of the target biological hot water boiler, wherein v 1 ′、v 1 Respectively representing the standard air speed of the air blower corresponding to the target biomass boiler and the actual air blower corresponding to the appointed time periodThe inter-wind speed, eta is a correction factor corresponding to the accuracy of the set blower wind speed.
9. The system for controlling oxygen content in flue gas according to claim 8, wherein the specific analysis process of the combustion condition regulation information corresponding to the analysis target biomass boiler in the specified time period is as follows:
when the combustion type corresponding to the target biomass boiler is the oxygen over-supply type, subtracting a preset first combustion state evaluation coefficient threshold value from a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period to obtain a first combustion state evaluation coefficient difference corresponding to the target biomass boiler in the specified time period, and comparing the first combustion state evaluation coefficient difference with a blower standard wind speed down-regulation value corresponding to each preset first combustion state evaluation coefficient difference to obtain a blower standard wind speed down-regulation value corresponding to the target biomass boiler in the specified time period, and calculating to obtain a blower actual wind speed down-regulation value corresponding to the target biomass boiler in the specified time period according to the accuracy of the blower wind speed of the target biomass boiler;
when the corresponding combustion type of the target biomass boiler is insufficient oxygen, subtracting a preset second combustion state evaluation coefficient threshold value from a combustion state evaluation coefficient corresponding to the target biomass boiler in a specified time period to obtain a second combustion state evaluation coefficient difference corresponding to the target biomass boiler in the specified time period, comparing the second combustion state evaluation coefficient difference with a preset blower standard wind speed up-regulation value corresponding to each second combustion state evaluation coefficient difference to obtain a blower standard wind speed up-regulation value corresponding to the target biomass boiler in the specified time period, and calculating to obtain a blower actual wind speed up-regulation value corresponding to the target biomass boiler in the specified time period according to the accuracy of the blower wind speed of the target biomass boiler.
10. The smoke oxygen content control system according to claim 9, further comprising an early warning terminal, wherein the early warning terminal is used for carrying out early warning prompt when the oxygen concentration of the smoke corresponding to the target biomass boiler in the specified time period is unqualified and the combustion type corresponding to the target biomass boiler in the specified time period is a normal combustion type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310607610.7A CN116592386A (en) | 2023-05-26 | 2023-05-26 | Flue gas oxygen content control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310607610.7A CN116592386A (en) | 2023-05-26 | 2023-05-26 | Flue gas oxygen content control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116592386A true CN116592386A (en) | 2023-08-15 |
Family
ID=87606053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310607610.7A Pending CN116592386A (en) | 2023-05-26 | 2023-05-26 | Flue gas oxygen content control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116592386A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116839060A (en) * | 2023-09-01 | 2023-10-03 | 南京盛略科技有限公司 | Method and system for detecting combustion in furnace |
| CN117686667A (en) * | 2024-01-31 | 2024-03-12 | 伟凯美(深圳)自动化技术有限公司 | Oxygen concentration detection and analysis method, device and system |
-
2023
- 2023-05-26 CN CN202310607610.7A patent/CN116592386A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116839060A (en) * | 2023-09-01 | 2023-10-03 | 南京盛略科技有限公司 | Method and system for detecting combustion in furnace |
| CN116839060B (en) * | 2023-09-01 | 2023-11-10 | 南京盛略科技有限公司 | Method and system for detecting combustion in furnace |
| CN117686667A (en) * | 2024-01-31 | 2024-03-12 | 伟凯美(深圳)自动化技术有限公司 | Oxygen concentration detection and analysis method, device and system |
| CN117686667B (en) * | 2024-01-31 | 2024-04-09 | 伟凯美(深圳)自动化技术有限公司 | Oxygen concentration detection and analysis method, device and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116592386A (en) | Flue gas oxygen content control system | |
| CN105465822A (en) | Boiler automatic control system and method | |
| CN115738622A (en) | Tail gas emission detection system of desulfurization equipment | |
| CN117053205A (en) | Household garbage incineration working condition control system based on low dioxin emission target | |
| CN110345463A (en) | A kind of boiler incipient fault recognition methods and device | |
| CN110262430A (en) | A kind of minimum discharge desulphurization energy-saving operating system of the overall process monitoring based on sulphur | |
| CN116805065B (en) | Intelligent management method for monitoring data of coal powder heating furnace burner | |
| CN201811207U (en) | High temperature corrosion state diagnosing and preventing system for water wall of boiler | |
| CN107543173A (en) | A kind of method and system for the waste incineration intelligent control for reducing dioxin emission | |
| CN117032099A (en) | Dry quenching closed-loop control method | |
| CN114562720B (en) | Catalytic combustion regulation and control boiler for efficient biomass incineration | |
| CN108949193B (en) | Coke oven waste gas circulation volume automatic control system and method | |
| CN207334775U (en) | Biological mass gas burnnig boiler flue gas emission oxygen content monitors Analysis Control Unit | |
| CN108072283B (en) | A kind of furnace control and control method | |
| CN202795024U (en) | Monitoring platform of biomass burning device | |
| CN205316379U (en) | Boiler operation oxygen volume automatic control system and boiler | |
| CN115183570A (en) | Mineral powder vertical mill system and automatic control method | |
| CN116518409B (en) | Feeding combustion-supporting cooperative system for coal combustion | |
| CN108393187B (en) | Automatic temperature control method for water granulated slag vertical mill system | |
| CN103301921B (en) | Energy-saving and emission-reducing device and method for industrial vertical mill | |
| KR20080101804A (en) | Using exhaust gas analysis of lng industrial boiler | |
| CN114187976B (en) | Oxygen amount prediction method based on real-time measurement data | |
| CN110566996A (en) | Biomass fuel boiler | |
| CN219571950U (en) | Performance self-adaptive combustion control system for oil field | |
| CN117053184A (en) | Boiler combustion system, boiler combustion control method, control device and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |