CN113834093A - A Wide Load Optimal Control System for Boiler Oxygen - Google Patents
A Wide Load Optimal Control System for Boiler Oxygen Download PDFInfo
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- CN113834093A CN113834093A CN202111284036.3A CN202111284036A CN113834093A CN 113834093 A CN113834093 A CN 113834093A CN 202111284036 A CN202111284036 A CN 202111284036A CN 113834093 A CN113834093 A CN 113834093A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
本发明涉及电厂锅炉氧量控制技术领域，且公开了一种锅炉氧量宽负荷优化控制系统，包括锅炉、送风设备和系统模糊控制模块，锅炉的内部安装有锅炉温度场数据采集模块、燃烧特性采集模块、煤粉细度数据采集模块和锅炉内燃烧情况反馈模块。该锅炉氧量宽负荷优化控制系统，根据锅炉温度场、燃烧特性和煤粉细度来确定锅炉不同热负荷的最佳氧量，采取先进模糊控制策略，实现宽负荷自动巡航中锅炉氧量控制，保持锅炉最佳燃烧工况，提升锅炉效率，且机组的送风量根据机组氧量实时校正，提高机组升降负荷过程中参数的稳定性，并提高锅炉中送风氧量控制的精度，且能够保证机组运行的经济性，以及提高了机组运行的环保性能。
The invention relates to the technical field of oxygen quantity control of power plant boilers, and discloses a boiler oxygen quantity wide load optimization control system, which includes a boiler, air supply equipment and a system fuzzy control module. The boiler is equipped with a boiler temperature field data acquisition module, a combustion Features acquisition module, pulverized coal fineness data acquisition module and combustion condition feedback module in the boiler. The boiler oxygen quantity wide load optimization control system determines the optimal oxygen quantity for different thermal loads of the boiler according to the boiler temperature field, combustion characteristics and pulverized coal fineness, and adopts an advanced fuzzy control strategy to realize the boiler oxygen quantity control in the wide-load automatic cruise. , maintain the best combustion conditions of the boiler, improve the efficiency of the boiler, and the air supply volume of the unit is corrected in real time according to the oxygen volume of the unit, which improves the stability of the parameters in the process of lifting and lowering the load of the unit, and improves the accuracy of the oxygen supply control in the boiler, and The economical operation of the unit can be ensured, and the environmental protection performance of the unit operation can be improved.
Description
Technical Field
The invention relates to the technical field of oxygen amount control of power plant boilers, in particular to a boiler oxygen amount wide load optimization control system.
Background
The power plant boiler is a medium-large boiler which provides steam with specified quantity and quality to a steam turbine in a power plant, is one of main thermal equipment of a thermal power plant, is usually matched with a steam turbine generator unit with a certain capacity, mainly comprises a pulverized coal furnace and a circulating fluidized bed boiler, wherein the pulverized coal furnace is widely used.
In the prior art, the air supply control of the boiler generally directly calculates a required air supply volume control signal through load or total fuel volume, and then corrects oxygen volume on the basis, however, even though an actual air supply volume curve is optimized and adjusted, the influence caused by fluctuation of environmental air pressure, coal quality and the like cannot be met, particularly, after the coal supply volume is increased in a variable load process, the fuel volume entering a hearth to participate in combustion cannot be immediately increased, the air supply volume in a dynamic process is seriously deviated from an ideal level, the content of nitrogen oxides discharged from a smoke in a load lifting process of a unit is greatly fluctuated, long-term economic loss and environmental protection control pressure are caused, and meanwhile, the air supply control of the boiler has important influence on the parameter stability in the load lifting process of the unit and influences the efficiency of the boiler.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a boiler oxygen amount wide load optimization control system, which determines the optimal oxygen amounts of different thermal loads of a boiler according to a boiler temperature field, combustion characteristics and pulverized coal fineness, adopts an advanced fuzzy control strategy to realize boiler oxygen amount control in wide load automatic cruise, maintains the optimal combustion working condition of the boiler, improves the boiler efficiency, corrects the air supply amount of a unit in real time according to the unit oxygen amount, improves the stability of parameters in the process of lifting the load of the unit, improves the control precision of the air supply oxygen amount in the boiler, can ensure the economy of unit operation, reduces the generation of nitrogen oxides, improves the environmental protection performance of unit operation, solves the problems that the control precision of the air supply oxygen amount in the existing boiler is poor, the oxygen content in the boiler is insufficient, the boiler efficiency is influenced, the generation of the nitrogen oxides is increased, and the long-term economic loss and the environmental protection control pressure are caused, the problem that the stability of parameters is poor in the process of lifting loads of the unit is solved.
In order to determine the optimal oxygen amount of different thermal loads of the boiler through the boiler temperature field, the combustion characteristics and the pulverized coal fineness, an advanced fuzzy control strategy is adopted, the boiler oxygen amount control in wide-load automatic cruise is realized, the optimal combustion working condition of the boiler is kept, the boiler efficiency is improved, the air supply amount of a unit is corrected in real time according to the unit oxygen amount, the parameter stability in the unit lifting load process is improved, the accuracy of air supply oxygen amount control in the boiler is improved, the economy of unit operation is ensured, the generation of nitrogen oxides is reduced, and the purpose of improving the unit operation environmental protection performance is achieved.
The invention provides the following technical scheme: the utility model provides a wide load optimal control system of boiler oxygen volume, includes boiler, air supply equipment and system fuzzy control module, the internally mounted of boiler has combustion condition feedback module in boiler temperature field data acquisition module, combustion characteristic acquisition module, buggy fineness data acquisition module and the boiler, the output of combustion condition feedback module all is through data line and system fuzzy control module's input signal connection in boiler temperature field data acquisition module, combustion characteristic acquisition module, buggy fineness data acquisition module and the boiler, air supply equipment's link pass through the data line with system fuzzy control module's link signal connection.
Preferably, the air supply equipment comprises a boiler blowing module, a boiler air inlet control module and an air flow monitoring module, the output end of the air flow monitoring module is in signal connection with the input end of the system fuzzy control module through a data line, and the input ends of the boiler blowing module and the boiler air inlet control module are in signal connection with the output end of the system fuzzy control module through a data line.
Preferably, the equipment of the boiler air blowing module is a large-sized air blower, the equipment of the boiler air intake control module is an electric valve, and the equipment of the air flow monitoring module is an air flow meter.
Preferably, the air outlet end of the boiler air blowing module is fixedly communicated with a first conduit, the output end of the first conduit is fixedly communicated with the air inlet of the boiler air inlet control module, the air outlet of the boiler air inlet control module is fixedly communicated with a second conduit, the output end of the second conduit is fixedly communicated with the input end of the air flow monitoring module, the output end of the air flow monitoring module is fixedly communicated with a third conduit, and the output end of the third conduit is fixedly communicated with the air inlet of the boiler.
Preferably, the air supply equipment comprises an air volume supplement module, the input end of the air volume supplement module is fixedly communicated with the output end of the system fuzzy control module through a data line, the air outlet of the air volume supplement module is fixedly communicated with a fourth conduit, and the output end of the fourth conduit is fixedly communicated with the pipe wall of the second conduit.
Preferably, the air volume supplementing module is a small blower.
Preferably, the input end of the system fuzzy control module is connected with an oxygen content acquisition module in the air through a data line signal.
Compared with the prior art, the invention provides a boiler oxygen content wide load optimization control system, which has the following beneficial effects:
the boiler oxygen amount wide-load optimization control system is provided with a boiler temperature field data acquisition module, a combustion characteristic acquisition module, a pulverized coal fineness data acquisition module, an in-boiler combustion condition feedback module and an air amount supplement module, when air enters a boiler, firstly, a system fuzzy control module acquires the oxygen content in the air around the boiler through the oxygen content acquisition module in the air, then, the system fuzzy control module acquires and knows detailed information data in the boiler through the boiler temperature field data acquisition module, the combustion characteristic acquisition module and the pulverized coal fineness data acquisition module, carries out comprehensive regulation and control, then, the system fuzzy control module controls a boiler air blowing module and a boiler air inlet amount control module to work to ensure that the oxygen amount in the boiler meets requirements, and then, the system fuzzy control module corrects the oxygen amount control precision in the boiler through the assistance of the in-boiler combustion condition feedback module and the air flow monitoring module, the system determines the optimal oxygen amount of different thermal loads of the boiler according to a boiler temperature field, combustion characteristics and pulverized coal fineness, adopts an advanced fuzzy control strategy, realizes the oxygen amount control of the boiler in wide-load automatic cruise, keeps the optimal combustion working condition of the boiler, improves the boiler efficiency, corrects the air supply amount of the unit in real time according to the oxygen amount of the unit, improves the stability of parameters in the load lifting process of the unit, improves the accuracy of the oxygen amount control of air supply in the boiler, can ensure the economical efficiency of the operation of the unit, reduces the generation of nitrogen oxides, and simultaneously improves the environmental protection performance of the operation of the unit.
Drawings
FIG. 1 is a schematic structural diagram of a boiler oxygen content wide load optimization control system according to the present invention.
In the figure: the system comprises a boiler 1, a boiler 11 temperature field data acquisition module, a combustion characteristic acquisition module 12, a pulverized coal fineness data acquisition module 13, a boiler internal combustion condition feedback module 14, an air supply device 2, a boiler air blowing module 21, a boiler air inlet control module 22, an air flow monitoring module 23, a first duct 24, a second duct 25, a third duct 26, an air flow supplementing module 27, a fourth duct 28, a system 3 fuzzy control module and an oxygen content acquisition module in air 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
Referring to fig. 1, a boiler oxygen amount wide load optimization control system comprises a boiler 1, an air supply device 2 and a system fuzzy control module 3, wherein a boiler temperature field data acquisition module 11, a combustion characteristic acquisition module 12, a coal fineness data acquisition module 13 and an in-boiler combustion condition feedback module 14 are installed inside the boiler 1, the output ends of the boiler temperature field data acquisition module 11, the combustion characteristic acquisition module 12, the coal fineness data acquisition module 13 and the in-boiler combustion condition feedback module 14 are all in signal connection with the input end of the system fuzzy control module 3 through data lines, the connecting end of the air supply device 2 is in signal connection with the connecting end of the system fuzzy control module 3 through data lines, the air supply device 2 comprises a boiler air blowing module 21, a boiler air intake control module 22 and an air flow monitoring module 23, the output end of the air flow monitoring module 23 is in signal connection with the input end of the system fuzzy control module 3 through data lines, the input ends of a boiler air blowing module 21 and a boiler air inlet control module 22 are in signal connection with the output end of a system fuzzy control module 3 through data lines, the air outlet end of the boiler air blowing module 21 is fixedly communicated with a first conduit 24, the output end of the first conduit 24 is fixedly communicated with the air inlet of the boiler air inlet control module 22, the air outlet of the boiler air inlet control module 22 is fixedly communicated with a second conduit 25, the output end of the second conduit 25 is fixedly communicated with the input end of an air flow monitoring module 23, the output end of the air flow monitoring module 23 is fixedly communicated with a third conduit 26, the output end of the third conduit 26 is fixedly communicated with the air inlet of a boiler 1, the system determines the optimal oxygen amount of different thermal loads of the boiler according to a boiler temperature field, combustion characteristics and pulverized coal fineness, adopts an advanced fuzzy control strategy to realize the oxygen amount control of the boiler in wide-load automatic cruise, keep the best burning operating mode of boiler, promote boiler efficiency, and the air supply volume of unit corrects according to unit oxygen volume in real time, improves the stability of unit lift load in-process parameter to improve the precision of air supply oxygen volume control in the boiler, and can guarantee the economic nature of unit operation, and reduce nitrogen oxide's formation, improved the feature of environmental protection of unit operation simultaneously.
The air supply device 2 comprises an air volume supplement module 27, the input end of the air volume supplement module 27 is fixedly communicated with the output end of the system fuzzy control module 3 through a data line, an air outlet of the air volume supplement module 27 is fixedly communicated with a fourth guide pipe 28, the output end of the fourth guide pipe 28 is fixedly communicated with the pipe wall of the second guide pipe 25, and in the variable load process, the air volume is set to meet the air volume required by the fuel of the steady-state unit, and the air volume is additionally increased to ensure that the variable load fuel volume has enough fuel air.
The input end of the system fuzzy control module 3 is connected with an oxygen content acquisition module 4 in the air through a data line signal, and the system fuzzy control module 3 acquires the oxygen content in the peripheral air of the boiler through the oxygen content acquisition module 4 in the air, so that the system knows the oxygen content in the unit air, and further the accuracy of the boiler oxygen content wide load optimization control is improved.
The equipment of boiler air-blast module 21 is large-scale air-blower, large-scale air-blower can ensure that the intake is sufficient, the equipment of boiler intake air control module 22 is electric valve, electric valve can conveniently adjust the boiler intake, the equipment of air flow monitoring module 23 is air flow meter, air flow meter can be to intake datamation, the system of being convenient for carries out the wide load optimal control of boiler oxygen volume, the equipment of air volume supplementary module 27 is small-size air-blower, small-size air-blower guarantees through additionally increasing the air supply volume that the variable load fuel volume has sufficient fuel wind, guarantee the abundant burning of buggy.
In summary, in the boiler oxygen amount wide load optimization control system, when the boiler is fed with air, firstly, the system fuzzy control module 3 collects the oxygen content in the air around the boiler through the oxygen content in air collection module 4, then the system fuzzy control module 3 collects 13 the detailed information data in the boiler 1 through the boiler temperature field data collection module 11, the combustion characteristic collection module 12 and the pulverized coal fineness data collection module, the system fuzzy control module 3 performs comprehensive regulation and control, then the system fuzzy control module 3 controls the boiler air blowing module 21 and the boiler air inlet flow control module 22 to work to ensure that the oxygen amount in the boiler meets the requirement, then the system fuzzy control module 3 corrects the oxygen amount control precision in the boiler 1 through the assistance of the boiler internal combustion condition feedback module 14 and the air flow monitoring module 23, and additionally supplements the air flow through the air flow supplementation module 27, in the process of load change, the air supply quantity is additionally increased to ensure that the fuel air with enough fuel quantity of the load change fuel quantity is provided, the great fluctuation of the content of nitrogen oxides discharged from the smoke in the process of load lifting of the unit is avoided as much as possible, and the influence on the parameter stability in the process of load lifting of the unit is reduced, the system determines the optimal oxygen amount of different thermal loads of the boiler according to the temperature field, the combustion characteristic and the fineness of pulverized coal of the boiler, adopts an advanced fuzzy control strategy to realize the oxygen amount control of the boiler in wide-load automatic cruise, keeps the optimal combustion working condition of the boiler, improves the efficiency of the boiler, the air output of the unit is corrected in real time according to the oxygen content of the unit, the stability of parameters in the process of lifting the load of the unit is improved, the control precision of the amount of supplied air oxygen in the boiler is improved, the running economy of the unit can be ensured, the generation of nitrogen oxides is reduced, and the environmental protection performance of the unit running is improved.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a wide load optimal control system of boiler oxygen volume, a serial communication port, including boiler (1), air supply equipment (2) and system fuzzy control module (3), the internally mounted of boiler (1) has in boiler temperature field data acquisition module (11), combustion characteristic acquisition module (12), buggy fineness data acquisition module (13) and the boiler combustion condition feedback module (14), the output of boiler temperature field data acquisition module (11), combustion characteristic acquisition module (12), buggy fineness data acquisition module (13) and the boiler combustion condition feedback module (14) all is through the input signal connection of data line with system fuzzy control module (3), the link of air supply equipment (2) pass through the data line with the link signal connection of system fuzzy control module (3).
2. The boiler oxygen amount wide-load optimization control system according to claim 1, wherein the air supply device (2) comprises a boiler air blowing module (21), a boiler air inlet amount control module (22) and an air flow monitoring module (23), an output end of the air flow monitoring module (23) is in signal connection with an input end of the system fuzzy control module (3) through a data line, and input ends of the boiler air blowing module (21) and the boiler air inlet amount control module (22) are in signal connection with an output end of the system fuzzy control module (3) through a data line.
3. The boiler oxygen amount wide-load optimization control system according to claim 2, characterized in that the devices of the boiler blowing module (21) are large blowers, the devices of the boiler air intake control module (22) are electric valves, and the devices of the air flow monitoring module (23) are air flow meters.
4. The boiler oxygen amount wide load optimization control system according to claim 2, wherein a first conduit (24) is fixedly communicated with an air outlet of the boiler air blowing module (21), an output end of the first conduit (24) is fixedly communicated with an air inlet of the boiler air inlet control module (22), a second conduit (25) is fixedly communicated with an air outlet of the boiler air inlet control module (22), an output end of the second conduit (25) is fixedly communicated with an input end of the air flow monitoring module (23), an output end of the air flow monitoring module (23) is fixedly communicated with a third conduit (26), and an output end of the third conduit (26) is fixedly communicated with an air inlet of the boiler (1).
5. The boiler oxygen amount wide load optimization control system according to claim 4, wherein the air supply device (2) further comprises an air volume supplement module (27), and an input end of the air volume supplement module (27) is fixedly communicated with an output end of the system fuzzy control module (3) through a data line.
6. The boiler oxygen amount wide load optimization control system according to claim 5, wherein an air outlet of the air volume supplementing module (27) is fixedly communicated with a fourth conduit (28), and an output end of the fourth conduit (28) is fixedly communicated with a tube wall of the second conduit (25).
7. The boiler oxygen amount wide-load optimization control system according to claim 5, characterized in that the device of the air volume supplement module (27) is a small blower.
8. The boiler oxygen amount wide-load optimization control system according to claim 1, characterized in that the input end of the system fuzzy control module (3) is connected with an air oxygen amount acquisition module (4) through a data line signal.
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Application publication date: 20211224 |