CN110006024A - The control planning of boiler furnace outlet zone temperature and air door determines method and device - Google Patents
The control planning of boiler furnace outlet zone temperature and air door determines method and device Download PDFInfo
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- CN110006024A CN110006024A CN201910052712.0A CN201910052712A CN110006024A CN 110006024 A CN110006024 A CN 110006024A CN 201910052712 A CN201910052712 A CN 201910052712A CN 110006024 A CN110006024 A CN 110006024A
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- air door
- temperature
- furnace outlet
- boiler
- secondary air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/06—Regulating air supply or draught by conjoint operation of two or more valves or dampers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/10—Correlation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/40—Simulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/02—Air or combustion gas valves or dampers
- F23N2235/06—Air or combustion gas valves or dampers at the air intake
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The present invention provides the control plannings of a kind of boiler furnace outlet zone temperature and air door to determine method and device, this method comprises: being directed to given load section, front wall and rear wall to target boiler carry out single secondary air register performance test respectively, obtain first temperature variation curve of the furnace outlet subregion of target boiler under the different baffle openings of different secondary air door；Front wall and rear wall to target boiler carry out single after-flame air door performance test respectively, obtain second temperature change curve of the furnace outlet subregion under the different baffle openings of different after-flame air doors；Data fitting is carried out to the first temperature variation curve and second temperature change curve, is obtained for characterizing the first transmission function for corresponding to control planning between furnace outlet zone temperature and single air door, air door includes the secondary air register or after-flame air door.
Description
Technical field
The present invention relates to automatic control technology field, more specifically to a kind of boiler furnace outlet zone temperature with
The corresponding control planning of air door (secondary air register and after-flame air door) determines method and device.
Background technique
The combustion case of power plant boiler and boiler operatiopn safety save coal-fired resource, the discharge for reducing NOx etc. connection
Close, traditional contact or contactless equal boiler furnaces thermometry are fastened since its measurement temperature range is limited, reliability
Difference, the problems such as error is higher and be unable to get popularization and application always.
In recent years, the style hearth temperature field measuring means based on sound wave or laser temperature-measuring technology obtain tremendous development, with its spirit
Sensitivity and precision are high, measure wide temperature range, measure the advantages that space is unrestricted, easy to maintain compensates for boiler furnace thermometric side
The blank in face can not only measure the mean temperature of furnace outlet outer ring and inner ring, moreover it is possible to carry out subregion to furnace outlet, provide
The mean temperature of each subregion provides optimized integration to burning optimization technology.
But due to not knowing pair between furnace outlet zone temperature and each air door (secondary air register or after-flame air door)
Control planning is answered, this is difficult to the equal control for realizing furnace exit temperature in the industry, and practical value is had a greatly reduced quality.
Summary of the invention
In view of this, to solve the above problems, the present invention provides the control of a kind of boiler furnace outlet zone temperature and air door
Relationship processed determines method and device.Technical solution is as follows:
The control planning of a kind of boiler furnace outlet zone temperature and air door determines method, which comprises
For given load section, front wall and rear wall to target boiler carry out single secondary air register performance test respectively, obtain
To first temperature variation curve of the furnace outlet subregion under the different baffle openings of different secondary air door of the target boiler；
Front wall and rear wall to the target boiler carry out single after-flame air door performance test respectively, obtain the burner hearth and go out
Second temperature change curve of the mouth subregion under the different baffle openings of different after-flame air doors；
Data fitting is carried out to first temperature variation curve and the second temperature change curve, is obtained for characterizing
The first transmission function of control planning is corresponded between furnace outlet zone temperature and single air door, the air door includes the Secondary Air
Door or the after-flame air door.
Preferably, the method also includes:
The operating status of the target boiler is monitored, and in the case where the target boiler is in steady operational status,
Given load section is directed to described in executing, front wall and rear wall to target boiler carry out single secondary air register performance test respectively, obtain
To first temperature variation curve of the furnace outlet subregion under the different baffle openings of different secondary air door of the target boiler.
Preferably, the method also includes:
First transmission function is carried out to simplify processing.
Preferably, the method also includes:
Front wall and rear wall to the target boiler carry out the secondary air register performance test of same layer bilateral, obtain the burner hearth and go out
Third temperature variation curve of the mouth subregion under the different baffle openings of different groups of same layer bilateral secondary air registers；
Front wall and rear wall to the target boiler carry out the air door performance test of same layer bilateral after-flame, obtain the burner hearth and go out
Fourth temperature variation curve of the mouth subregion under the different baffle openings of different groups of same layer bilateral after-flame air doors；
Data fitting is carried out to the third temperature variation curve and the 4th temperature variation curve, is obtained for characterizing
The second transmission function of control planning is corresponded between furnace outlet zone temperature and same layer bilateral air door.
Preferably, the method also includes:
Second transmission function is carried out to simplify processing.
A kind of control planning determining device of boiler furnace outlet zone temperature and air door, described device include:
Test module, for being directed to given load section, front wall and rear wall to target boiler carry out single Secondary Air respectively
Door performance test, obtains first of the furnace outlet subregion of the target boiler under the different baffle openings of different secondary air door
Temperature variation curve；Front wall and rear wall to the target boiler carry out single after-flame air door performance test respectively, obtain described
Second temperature change curve of the furnace outlet subregion under the different baffle openings of different after-flame air doors；
Fitting module, it is quasi- for carrying out data to first temperature variation curve and the second temperature change curve
It closes, obtains for characterizing the first transmission function for corresponding to control planning between furnace outlet zone temperature and single air door, the wind
Door includes the secondary air register or the after-flame air door.
Preferably, described device further include:
Monitoring modular is in stable operation for monitoring the operating status of the target boiler, and in the target boiler
In the case where state, the test module is triggered.
Preferably, the fitting module, is also used to:
First transmission function is carried out to simplify processing.
Preferably, the test module, is also used to:
Front wall and rear wall to the target boiler carry out the secondary air register performance test of same layer bilateral, obtain the burner hearth and go out
Third temperature variation curve of the mouth subregion under the different baffle openings of different groups of same layer bilateral secondary air registers；To the target pot
The front wall of furnace and rear wall carry out the air door performance test of same layer bilateral after-flame, and it is double in different groups of same layers to obtain the furnace outlet subregion
The 4th temperature variation curve under the different baffle openings of side after-flame air door；
The fitting module, is also used to:
Data fitting is carried out to the third temperature variation curve and the 4th temperature variation curve, is obtained for characterizing
The second transmission function of control planning is corresponded between furnace outlet zone temperature and same layer bilateral air door.
Preferably, the fitting module, is also used to:
Second transmission function is carried out to simplify processing.
The present invention provides a kind of boiler furnace outlet zone temperature and the control planning of air door determines method and device, with one
Simple, the safe and effective performance test mode of kind, which determines, corresponds to control planning between furnace outlet zone temperature and each air door, is protecting
It, can be by adjusting Secondary Air and burnout degree for furnace combustion state to optimal area and comfortable under the premise of demonstrate,proving boiler operatiopn safety
Area's transfer, thus the problems such as guaranteeing that boiler kindling is stablized, burn complete, combustion even, reducing burning, slagging, superheater over temperature partially
Appearance, improve boiler thermal efficiency, reduce the discharge of pollutant.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 determines method for the control planning of boiler furnace outlet zone temperature provided in an embodiment of the present invention and air door
Method flow diagram；
Fig. 2 is the arrangement of sound wave thermometric and the schematic diagram of furnace exit temperature partition definition；
Fig. 3 determines method for the control planning of boiler furnace outlet zone temperature provided in an embodiment of the present invention and air door
Another method flow chart；
Fig. 4 determines method for the control planning of boiler furnace outlet zone temperature provided in an embodiment of the present invention and air door
Another method flow chart；
Fig. 5 determines method for the control planning of boiler furnace outlet zone temperature provided in an embodiment of the present invention and air door
Another method flow chart；
Fig. 6 is the control planning determining device of boiler furnace outlet zone temperature provided in an embodiment of the present invention and air door
Structural schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of boiler furnace outlet zone temperature and the control planning of air door determines method, the party
The method flow diagram of method is as shown in Figure 1, include the following steps:
S10, for given load section, front wall and rear wall to target boiler carry out single secondary air register performance respectively and survey
It is bent to obtain first temperature change of the furnace outlet subregion of target boiler under the different baffle openings of different secondary air door for examination
Line.
During executing step S10, given load section can be any one load high, in neutralization underload section
Section, following all tests are carried out under a load in the given load section.Certainly, such as to high, neutralization underload Duan Junjin
The following test of row, then can obtain the control planning of the boiler furnace outlet zone temperature and air door under full working scope.
Firstly, doing simple introduction to the temperature of furnace outlet subregion:
For convenience of understanding, said so that target boiler is the direct current cooker using rotation flow impact combustion system as an example herein
Bright, certain target boiler is not limited to direct current cooker:
For the boiler using rotation flow impact combustion system, the fire box temperature field based on sound wave temperature-measurement principle monitors system on-line
Boiler section can be divided into p subregion by system, and the zone temperature of p subregion is by DCS (Distributed Control
System, decentralised control) the sound wave thermometric systematic survey in system obtains.Meanwhile burner hearth outer ring mean temperature is by the outside of burner hearth
Each zone temperature calculates, and burner hearth inner ring mean temperature is on the inside of burner hearth from each zone temperature calculating.Record is specified at this time
The temperature T01-T0p of moment furnace outlet subregion, initial burner hearth outer ring mean temperature Tp01, initial burner hearth inner ring is averaged warm
Spend Tp02.
For example, test power plant is certain genco #1 unit, boiler is the direct current cooker using rotation flow impact combustion system,
Rated power 600MW has 6 medium-speed pulverizers to blow powder system with positive pressure direct, is disposed in burner hearth based on sound wave temperature-measurement principle
Fire box temperature field on-line monitoring system, in 580MW, 450MW and 330MW, these three senior middle school's underload sections are tested respectively.
Boiler section is divided into 16 by the arrangement and furnace exit temperature partition definition of sound wave thermometric as shown in Figure 2, system
Subregion, 16 zone temperature T01-T016 obtain by sound wave thermometric systematic survey, meanwhile, burner hearth outer ring mean temperature Tp01 is by 1-
This 12 zone temperatures of 12 subregions calculate, and burner hearth inner ring mean temperature Tp02 is calculated by this 4 zone temperatures of 13-16 subregion
?.
Further, for each layer secondary air register of front wall and each layer secondary air register of rear wall, it is performed both by performance test, with
This obtains first temperature variation curve of the furnace outlet subregion under each layer secondary air register difference baffle opening.Below to Secondary Air
The process that door A is tested for the property is illustrated:
Step (1): for secondary air register A, baffle opening adjusts (increasing or decreasing) a1% on the basis of original aperture,
Certain time length is waited, after fire box temperature is stablized, passes through the first temperature of DCS system historgraphic data recording furnace outlet subregion
Tn1-Tnp change curve, burner hearth outer ring mean temperature Tpn1 change curve at this time, burner hearth inner ring mean temperature Tpn2 variation are bent
Line.
Step (2): the baffle opening of secondary air register A is restored to original aperture, and waits stabilization.
Step (3): baffle opening be sequentially adjusted in and (increase or decrease) on the basis of original aperture b1%, c1%, d1%,
E1% ... is tested for the property again by above-mentioned steps and records related data.
Do not occur for a long time partially it should be noted that the adjusting range of secondary air register baffle opening should ensure that in furnace flame
In the range of burning and furnace outlet NOx content are not significantly increased.It is as far as possible in reasonable range to do several groups of data more
To guarantee the accuracy of test result, and the baffle opening of the secondary air register is restored after the completion of any secondary air register performance test
To original aperture.
For example, the burner of the direct current cooker of rotation flow impact combustion system generally divides front and back wall cross collocation, the two of front wall
Three layers of secondary air door point is followed successively by D layers, C layers, E layers from high to low, and three layers of the secondary air register point of rear wall is followed successively by A layers, F from high in the end
Layer, B layer, B mill is spare in 6 coal pulverizers, remaining 5 mills operate normally, and rear wall B layers of secondary air register initial opening is 20% left side
The right side, remaining several layers of secondary air register aperture is in 50%-55% or so.
It is illustrated for E layers of secondary air register of front wall, baffle opening increases by 5% on the basis of original aperture, waits
10min is become after fire box temperature is stablized by DCS system historgraphic data recording furnace outlet subregion the first temperature Tn1-Tn16
Change curve, burner hearth outer ring mean temperature Tpn1 change curve at this time, burner hearth inner ring mean temperature Tpn2 change curve；Restore gear
Plate aperture waits stabilization to original aperture；Regulating fender aperture increases by 10% on the original basis, waits 10min ... ... straight
After the completion of the performance test all to E layers of secondary air register of front wall, restore baffle opening to original aperture.
D layers of front wall, C layers of front wall, wall A layers latter, wall F layers latter, rear wall B layers of secondary air register are carried out respectively according to above-mentioned process
Performance test records related data and restores baffle opening to original aperture after the completion of test.
S20, front wall and rear wall to target boiler carry out single after-flame air door performance test respectively, obtain furnace outlet point
Second temperature change curve of the area under the different baffle openings of different after-flame air doors.
During executing step S20, each layer after-flame air door of each layer after-flame air door and rear wall for front wall,
It is bent to obtain second temperature variation of the furnace outlet subregion under each layer after-flame air door difference baffle opening with this for execution performance test
Line.Under the after-flame air door B process being tested for the property is illustrated:
Step (1): for after-flame air door B, baffle opening adjusts (increasing or decreasing) h1% on the basis of original aperture,
Certain time length is waited, after fire box temperature is stablized, passes through DCS system historgraphic data recording furnace outlet subregion second temperature Tq1-
Tqp change curve, burner hearth outer ring mean temperature Tpq1 change curve at this time, burner hearth inner ring mean temperature Tpq2 change curve.
Step (2): the baffle opening of after-flame air door B is restored to original aperture, and waits stabilization.
Step (3): baffle opening be sequentially adjusted in and (increase or decrease) on the basis of original aperture g1%, k1%, m1%,
N1% ... is tested for the property again by above-mentioned steps and records related data.
Do not occur for a long time partially it should be noted that the adjusting range of after-flame damper aperture should ensure that in furnace flame
In the range of burning and furnace outlet NOx content are not significantly increased.And it is as far as possible in reasonable range to do several groups more
Data are to guarantee the accuracy of test result, and by the baffle opening of the after-flame air door after the completion of any after-flame air door performance test
Restore to original aperture.
For example, the burner of the direct current cooker for rotation flow impact combustion system, the after-flame air door of front wall is one layer and (is denoted as
G layers), the after-flame air door of rear wall is also one layer (being denoted as H layers).It is illustrated for G layers of after-flame air door of front wall, baffle opening is in original
Have and increase by 5% on the basis of aperture, wait 10min, after fire box temperature is stablized, passes through DCS system historgraphic data recording burner hearth
Export subregion second temperature Tq1-Tq16 change curve, burner hearth outer ring mean temperature Tpq1 change curve at this time, burner hearth inner ring
Mean temperature Tpq2 change curve；Restore baffle opening to original aperture, and waits stabilization；Regulating fender aperture is in original base
It is upper to increase by 10%, it waits 10min ... ... after the completion of all performance tests of G layers of after-flame air door of front wall, restores baffle opening
To original aperture.
Rear wall H layers of after-flame air door is tested for the property again according to above-mentioned process, record related data and is completed in test
Baffle opening is restored to original aperture afterwards.
S30 carries out data fitting to the first temperature variation curve and second temperature change curve, obtains for characterizing burner hearth
The first transmission function of control planning is corresponded between outlet zone temperature and single air door, air door includes secondary air register or burnout degree
Door.
During executing step S30, System Discrimination can be carried out to data using matlab software or other software
Obtain the first system transfer function matrix shown in following formula (1):
Wherein, each symbol meaning is as shown in table 1 below in formula (1):
Table 1
It should be noted that the G in formulaabThe difference of viewing system identification accuracy may have different structure and ginseng
Number, transmission function may also have lesser deviation under the test conditions such as different load.
In some other embodiment, for the relevance for improving the first transmission function, boiler furnace outlet shown in Fig. 1 point
Further include following steps on the basis of the control planning of area's temperature and air door determines method, method flow diagram is as shown in Figure 3:
S40 carries out the first transmission function to simplify processing.
During executing step S40, by considering for performance indexes to system and actual conditions, remove
The part that wherein system response time is slow, delay is big, adjustable range is small, uncontrollable only retains and each zone temperature relevance
Strong factor, the first system transfer function matrix after capable of being simplified, then by different load, under different opening situations such as
Data are modified the parameter of transfer function matrix in formula, and simplified furnace outlet zone temperature and unilateral air door can be obtained
Between correspond to control planning.
For example, the burner of the direct current cooker for rotation flow impact combustion system, obtains furnace outlet in specific load section
Shown in the following formula of corresponding relationship (2) between zone temperature Y1-Y16 and each air door X1-X8:
Wherein, each transmission function is as follows:
From the result of System Discrimination: secondary air register is surveyed by lower layer to upper layer with apart from furnace outlet zone temperature
That puts is close, and the delay time shortens, and the gain coefficient K in transmission function is increasing, shows that the response amplitude of system is increasing,
The time constant T in inertial element reduces simultaneously, shows that the rapidity of system response is become better and better.Since pure lag system can make
The stability of control system reduces, and dynamic characteristic is deteriorated, particularly with the ratio between pure delay time and the time constant of controlled device
Large Time-delay Process greater than 0.3 can be such that the control quality of system is decreased obviously, and hardly resulted in using conventional control strategy full
The control performance of meaning brings very big difficulty to the design of subsequent burner hearth zone temperature control system controller, in addition, following two
Layer secondary air register aperture to hold furnace flame will not excessively undershoot, prevent uncombusted carbon granules from falling into dry bottom hopper, keep burner hearth
The Significance for Environment of oxygen debt burning is great, while its transmission function gain is small, time constant is big, as the means for adjusting zone temperature
Low-response, adjustable range are small, control is difficult, therefore, will be greater than 10 in the delay time in this example, gain K is smaller, and the inertial element time is normal
The number biggish part T is omitted, and reservation is big on zone temperature influence, influences rapid while delay time small easily controllable portion
Point, obtain simplified the first system transfer function matrix shown in following formula (3):
The meaning of parameter and the same formula of transmission function (2) in formula in above formula, details are not described herein, obtains in this way
Formula the practicality, availability greatly enhance, the controller design difficulty and difficulty in engineering realization of zone temperature substantially reduce.
The data relationship established according to formula above, so that it may quantitatively obtain corresponding control between furnace outlet zone temperature and single air door
Relationship.Again by the inside and outside circle mean temperature change curve of the burner hearth being recorded, boiler combustion is found out by follow-up test, test
Optimal area and comfort zone, in conjunction with relevant control algorithm, so that it may which convenient control furnace outlet inner ring zone temperature is flat to inner ring
The setting value of equal temperature is drawn close, and outer ring zone temperature is drawn close to the setting value of outer ring mean temperature, improves the stabilization of boiler combustion
Property, economy and the feature of environmental protection.
In some other embodiment, for the even running for guaranteeing test, boiler furnace outlet zone temperature shown in Fig. 1
Further include following steps on the basis of determining method with the control planning of air door, method flow diagram is as shown in Figure 4:
S50, the operating status of monitoring objective boiler, and in the case where target boiler is in steady operational status, it executes
Step S10.
It, can be to boiler primary operating parameter, such as carbonated drink, air and flue system, main steam during executing step S50
Pressure and centrum's temperature are monitored, and parameter just indicates stable operation of the boiler in regulation fluctuation range.
Certainly, also it needs to be determined that sound wave temp measuring system can normally come into operation before test, sounding measuring point is receiving measuring point just
Often, each zone temperature can rapidly and accurately be shown to DCS system picture, and secondary air register, burnout degree pitch, which are in, operates normally shape
State, without significant deficiency, secondary system wind becomes with each data history of furnace outlet zone temperature for other major-minor equipment of unit and system
Gesture saves normal, etc..
In addition, in order to guarantee test accuracy, given load section test when, in addition to predetermined operation without wind pressure,
The adjustment of the parameters such as air quantity, in addition should keep the stabilization that coal is used in test process as far as possible, and elimination causes because of coal type change
Boiler export zone temperature fluctuation.
In some other embodiment, for improve control accuracy, boiler furnace outlet zone temperature shown in Fig. 1 with
Further include following steps on the basis of the control planning of air door determines method, method flow diagram is as shown in Figure 5:
S60, front wall and rear wall to target boiler carry out the secondary air register performance test of same layer bilateral, obtain furnace outlet point
Third temperature variation curve of the area under the different baffle openings of different groups of same layer bilateral secondary air registers.
During executing step S60, performance is performed both by for each group of same layer bilateral secondary air register of front wall and rear wall
Test, for example for the direct current cooker of rotation flow impact combustion system, three groups of same layer bilateral secondary air registers are respectively D layers of front wall with after
A layers of wall, C layers of front wall and wall F layers latter, E layers of front wall and wall B layers latter.Below to progress by taking one group of same layer bilateral secondary air register as an example
The process of performance test is illustrated:
Step (1): for each of this group of same layer bilateral secondary air register, baffle opening is on the basis of original aperture
A2% is adjusted and (increased or decreased) simultaneously, certain time length is waited, after fire box temperature is stablized, is remembered by DCS system historical trend
The third temperature Tmn1-Tmnp change curve of furnace outlet subregion is recorded, burner hearth outer ring mean temperature Tpmn1 at this time changes bent
Line, burner hearth inner ring mean temperature Tpmn2 change curve.
Step (2): baffle opening is restored to original aperture, and waits stabilization.
Step (3): baffle opening on the basis of original aperture successively simultaneously adjust and (increase or decrease) b2%, c2%,
D2%, e2% ... are tested for the property again by above-mentioned steps and record related data.
Do not occur for a long time partially it should be noted that the adjusting range of secondary air register baffle opening should ensure that in furnace flame
In the range of burning and furnace outlet NOx content are not significantly increased.It is as far as possible in reasonable range to do several groups of data more
To guarantee the accuracy of test result, and by this group of same layer bilateral after the completion of any group same layer bilateral secondary air register performance test
The baffle opening of secondary air register restores to original aperture.
S70, front wall and rear wall to target boiler carry out the air door performance test of same layer bilateral after-flame, obtain furnace outlet point
Fourth temperature variation curve of the area under the different baffle openings of different groups of same layer bilateral after-flame air doors.
During executing step S70, for each group of same layer bilateral after-flame air door of front wall and rear wall, such as rotation
The direct current cooker of opposed firing mode is flowed, one group of same layer bilateral after-flame air door is front wall G layers of after-flame air door and rear wall H layers of burnout degree
Door.The process being tested for the property is illustrated by taking this group of same layer bilateral after-flame air door as an example below:
Step (1): for each of this group of same layer bilateral after-flame air door, baffle opening is on the basis of original aperture
H2% is adjusted and (increased or decreased) simultaneously, certain time length is waited, after fire box temperature is stablized, is remembered by DCS system historical trend
The 4th temperature Tqh1-Tqhp change curve of furnace outlet subregion is recorded, burner hearth outer ring mean temperature Tpqh1 at this time changes bent
Line, burner hearth inner ring mean temperature Tpqh2 change curve.
Step (2): baffle opening is restored to original aperture, and waits stabilization.
Step (3): baffle opening on the basis of original aperture successively simultaneously adjust and (increase or decrease) g2%, k2%,
M2%, n2% ... are tested for the property again by above-mentioned steps and record related data.
Do not occur for a long time partially it should be noted that the adjusting range of after-flame damper aperture should ensure that in furnace flame
In the range of burning and furnace outlet NOx content are not significantly increased.And it is as far as possible in reasonable range to do several groups more
Data arbitrarily organize the performance test of same layer bilateral after-flame air door after the completion for this group of same layer pair to guarantee the accuracy of test result
The baffle opening of the after-flame air door of side restores to original aperture.
S80 carries out data fitting to third temperature variation curve and the 4th temperature variation curve, obtains for characterizing burner hearth
The second transmission function of control planning is corresponded between outlet zone temperature and same layer bilateral air door.
During executing step S80, System Discrimination can be carried out to data using matlab software or other software
Second system transfer function matrix is obtained, detailed process may refer to obtain the first system transfer function matrix in above-mentioned steps S30
Process, details are not described herein.
It certainly,, can also be to the second transmitting letter for the relevance for improving the second transmission function in some other embodiment
Number carries out simplifying processing, and the specific process that simplifies may refer to the simplification in step S40 to the first transmission function, no longer superfluous herein
It states.
The control planning of boiler furnace outlet zone temperature and air door provided in an embodiment of the present invention determines method, with one kind
Simply, safe and effective performance test methods, which determine, corresponds to control planning between furnace outlet zone temperature and each air door, is guaranteeing
It, can be by adjusting Secondary Air and burnout degree for furnace combustion state to optimal area and comfort zone under the premise of boiler operatiopn safety
Transfer, thus the problems such as guaranteeing that boiler kindling is stablized, burn complete, combustion even, reducing burning, slagging, superheater over temperature partially
Occur, improves boiler thermal efficiency, reduce the discharge of pollutant.
The control planning of the boiler furnace outlet zone temperature and air door that provide based on the above embodiment determines method, this hair
Bright embodiment then provides the control planning determining device of a kind of boiler furnace outlet zone temperature and air door, and the structure of the device is shown
It is intended to as shown in Figure 6, comprising:
Test module 10, for being directed to given load section, front wall and rear wall to target boiler carry out single secondary respectively
Air door performance test obtains first temperature of the furnace outlet subregion of target boiler under the different baffle openings of different secondary air door
Spend change curve；Front wall and rear wall to target boiler carry out single after-flame air door performance test respectively, obtain furnace outlet point
Second temperature change curve of the area under the different baffle openings of different after-flame air doors.
Fitting module 20 is obtained for carrying out data fitting to the first temperature variation curve and second temperature change curve
For characterizing the first transmission function for corresponding to control planning between furnace outlet zone temperature and single air door, air door includes Secondary Air
Door or after-flame air door.
In some other embodiment, for the even running for guaranteeing test, boiler furnace outlet zone temperature shown in Fig. 6
Further include following module on the basis of the control planning determining device of air door:
Monitoring modular is in the feelings of steady operational status for the operating status of monitoring objective boiler, and in target boiler
Under condition, test module 10 is triggered.
In some other embodiment, for the relevance for improving the first transmission function, fitting module 30 is also used to:
First transmission function is carried out to simplify processing.
In some other embodiment, for the accuracy for improving control, test module 20 is also used to:
Front wall and rear wall to target boiler carry out the secondary air register performance test of same layer bilateral, obtain furnace outlet subregion and exist
Third temperature variation curve under the different baffle openings of difference group same layer bilateral secondary air register；To the front wall of target boiler and after
Wall carries out the air door performance test of same layer bilateral after-flame, obtains furnace outlet subregion in the difference of different groups of same layer bilateral after-flame air doors
The 4th temperature variation curve under baffle opening；
Fitting module 30, is also used to:
Data fitting is carried out to third temperature variation curve and the 4th temperature variation curve, is obtained for characterizing furnace outlet
The second transmission function of control planning is corresponded between zone temperature and same layer bilateral air door.
In some other embodiment, for the relevance for improving the second transmission function, fitting module 30 is also used to:
Second transmission function is carried out to simplify processing.
The control planning determining device of boiler furnace outlet zone temperature and air door provided in an embodiment of the present invention, with one kind
Simply, safe and effective performance test methods, which determine, corresponds to control planning between furnace outlet zone temperature and each air door, is guaranteeing
It, can be by adjusting Secondary Air and burnout degree for furnace combustion state to optimal area and comfort zone under the premise of boiler operatiopn safety
Transfer, thus the problems such as guaranteeing that boiler kindling is stablized, burn complete, combustion even, reducing burning, slagging, superheater over temperature partially
Occur, improves boiler thermal efficiency, reduce the discharge of pollutant.
Method is determined to the control planning of a kind of boiler furnace outlet zone temperature provided by the present invention and air door above
And device is described in detail, it is used herein that a specific example illustrates the principle and implementation of the invention,
The above description of the embodiment is only used to help understand the method for the present invention and its core ideas；Meanwhile for the one of this field
As technical staff, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, to sum up institute
It states, the contents of this specification are not to be construed as limiting the invention.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
For the device disclosed in the embodiment, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, phase
Place is closed referring to method part illustration.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the element that the process, method, article or equipment including a series of elements is intrinsic,
It further include either the element intrinsic for these process, method, article or equipments.In the absence of more restrictions,
The element limited by sentence "including a ...", it is not excluded that in the process, method, article or equipment including the element
In there is also other identical elements.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. the control planning of a kind of boiler furnace outlet zone temperature and air door determines method, which is characterized in that the method packet
It includes:
For given load section, front wall and rear wall to target boiler carry out single secondary air register performance test respectively, obtain institute
State first temperature variation curve of the furnace outlet subregion of target boiler under the different baffle openings of different secondary air door；
Front wall and rear wall to the target boiler carry out single after-flame air door performance test respectively, obtain the furnace outlet point
Second temperature change curve of the area under the different baffle openings of different after-flame air doors；
Data fitting is carried out to first temperature variation curve and the second temperature change curve, is obtained for characterizing burner hearth
Correspond to the first transmission function of control planning between outlet zone temperature and single air door, the air door include the secondary air register or
After-flame air door described in person.
2. the method according to claim 1, wherein the method also includes:
The operating status of the target boiler is monitored, and in the case where the target boiler is in steady operational status, executed
Described to be directed to given load section, front wall and rear wall to target boiler carry out single secondary air register performance test respectively, obtain institute
State first temperature variation curve of the furnace outlet subregion of target boiler under the different baffle openings of different secondary air door.
3. the method according to claim 1, wherein the method also includes:
First transmission function is carried out to simplify processing.
4. the method according to claim 1, wherein the method also includes:
Front wall and rear wall to the target boiler carry out the secondary air register performance test of same layer bilateral, obtain the furnace outlet point
Third temperature variation curve of the area under the different baffle openings of different groups of same layer bilateral secondary air registers；
Front wall and rear wall to the target boiler carry out the air door performance test of same layer bilateral after-flame, obtain the furnace outlet point
Fourth temperature variation curve of the area under the different baffle openings of different groups of same layer bilateral after-flame air doors；
Data fitting is carried out to the third temperature variation curve and the 4th temperature variation curve, is obtained for characterizing burner hearth
The second transmission function of control planning is corresponded between outlet zone temperature and same layer bilateral air door.
5. according to the method described in claim 4, it is characterized in that, the method also includes:
Second transmission function is carried out to simplify processing.
6. the control planning determining device of a kind of boiler furnace outlet zone temperature and air door, which is characterized in that described device packet
It includes:
Test module, for being directed to given load section, front wall and rear wall to target boiler carry out single secondary air register respectively
It can test, obtain first temperature of the furnace outlet subregion of the target boiler under the different baffle openings of different secondary air door
Change curve；Front wall and rear wall to the target boiler carry out single after-flame air door performance test respectively, obtain the burner hearth
Export second temperature change curve of the subregion under the different baffle openings of different after-flame air doors；
Fitting module is obtained for carrying out data fitting to first temperature variation curve and the second temperature change curve
To for characterizing the first transmission function for corresponding to control planning between furnace outlet zone temperature and single air door, the air door includes
The secondary air register or the after-flame air door.
7. device according to claim 6, which is characterized in that described device further include:
Monitoring modular is in steady operational status for monitoring the operating status of the target boiler, and in the target boiler
In the case where, trigger the test module.
8. device according to claim 6, which is characterized in that the fitting module is also used to:
First transmission function is carried out to simplify processing.
9. device according to claim 6, which is characterized in that the test module is also used to:
Front wall and rear wall to the target boiler carry out the secondary air register performance test of same layer bilateral, obtain the furnace outlet point
Third temperature variation curve of the area under the different baffle openings of different groups of same layer bilateral secondary air registers；To the target boiler
Front wall and rear wall carry out the air door performance test of same layer bilateral after-flame, obtain the furnace outlet subregion and fire in different groups of same layer bilaterals
The 4th temperature variation curve to the greatest extent under the different baffle openings of air door；
The fitting module, is also used to:
Data fitting is carried out to the third temperature variation curve and the 4th temperature variation curve, is obtained for characterizing burner hearth
The second transmission function of control planning is corresponded between outlet zone temperature and same layer bilateral air door.
10. device according to claim 6, which is characterized in that the fitting module is also used to:
Second transmission function is carried out to simplify processing.
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