CN107191914A - Boiler on-line tuning system and method based on as-fired coal information and fire defector - Google Patents
Boiler on-line tuning system and method based on as-fired coal information and fire defector Download PDFInfo
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- CN107191914A CN107191914A CN201710580113.7A CN201710580113A CN107191914A CN 107191914 A CN107191914 A CN 107191914A CN 201710580113 A CN201710580113 A CN 201710580113A CN 107191914 A CN107191914 A CN 107191914A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F22B35/18—Applications of computers to steam boiler control
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Abstract
The present invention relates to a kind of boiler on-line tuning system and method, belong to coal powder boiler combustion control field, be specifically related to a kind of boiler on-line tuning system and method based on as-fired coal information and fire defector.The present invention obtains real-time as-fired coal ature of coal information online by coal yard digitization system；By furnace flame monitoring device, real-time combustion flame image in stove can be obtained, burner hearth combustion stability is analyzed.Burning on-line control system combination as-fired coal information, optimizes boiler coal feeding；Detected by furnace flame, obtain combustion stability and economic diagnosis in stove, with reference to unit operational factor, optimization boiler air-supply.The present invention is according to real-time as-fired coal information and its combustion position in stove, control is optimized to boiler coal feeding and air-supply, the efficient utilization of fuel can be achieved, improve adaptability of the boiler to fuel type and quality comparison, it is ensured that stability, security and economy of the boiler in depth peaking operation.
Description
Technical field
The present invention relates to a kind of boiler on-line tuning system and method, belong to coal powder boiler combustion control field, be specifically
It is related to a kind of boiler on-line tuning system and method based on as-fired coal information and fire defector.
Background technology
Coal accounts for critical role in the primary energy structure of China, and the thermal power generation based on fire coal accounts for China Power work
The proportion of industry is up to 60%, and in one considerably long period basic change will not occur for this energy resource structure.Coal resources in China point
Cloth is uneven, and the coal ature of coal of different sources differs greatly, and coal market supply conditions are nervous, and coal fuel cost is presented and risen steadily
Trend so that most of power plant all carry out mixture using many coals and mix burning.Boiler uses non dipper, if without science
Burning optimization, may result in the stability of boiler operatiopn, security and decline, boiler efficiency and economy reduction.
In the burning regulation of boiler, the on-line checking of coal-air ratio and control are fossil-fired unit depth load controls
Difficult point, that is, consider the balance between economy and combustion stability.Rational as-fired coal matter can be configured according to digital coal yard,
Coal-air ratio situation can be fed back by combustion supervision in stove, can be operating significantly in flexibility by the two effective integration
Good economy and combustion stability are maintained in degree load alternation process.The gray scale of combustion flame image reflects pulsation in stove
Situation, the value in sampling time directly affects the result calculated, and usual sampling time T is bigger, and data variation curve is more smooth,
And diagnosed in time for flame-out can not provide suddenly of burner hearth, reduce the sensitivity of diagnosis；Sampling time, T was too small, then due to
The flicker and pulsation of flame, can affect the accurate of result of calculation, produce random error.Studied by furnace flame analysis
During combustion stability, when being analyzed using digital image processing techniques hearth combustion, the gray scale of each pixel can be obtained, that is, is radiated
Can numerical value.Relative to flame radiosity energy and the area of high-temperature area radiation energy, area of flame, which is used as, characterizes combustion position
Geometric feature, the existing substantial amounts of research in Theory of Combustion, the area of its correspondence and CCD vertical direction is original by counting
The number of all pixels point in flame more than certain radiation level, because the elemental area that each pixel is accounted for is roughly the same, institute
Can represent that combustion position and area of flame have very close in the relative value of area of flame, stove with number of pixels
System.
With reference to real-time as-fired coal ature of coal information, radiation energy can reflect combustion position in stove, the ature of coal information of as-fired coal
Change or the change of air-supply can all be such that radiation energy changes rapidly.Therefore, boiler coal-air ratio regulator control system during depth peak regulation is sought
It is the guarantee that unit is normally run with method.
The ature of coal information of the present invention refers exclusively to the coal composition into stove mixture coal, the quality of each coal, the fuel mixing ratio of each coal
Example.Each single coal without mixture is accordingly to be regarded as special mixture coal.
In the published patented technology in this area, Publication No. CN1388340A, entitled " measurement boiler combustion radiation
The patent of energy and temperature field and the method and its system for controlling burning " is used to be visited by CCD camera, infrared radiation thermometer, visible ray
The emittance and temperature for the combustion supervision system detectio furnace interior point measuring point that head is constituted, system complex fail to realize to typical case
When region and depth varying duty in stove combustion stability detection, also do not optimized for different as-fired coal situations.
Publication No. CN101078526A, the entitled " power boiler burning optimization method based on infra red radiation energy signal
And device " patent utilization be arranged on a certain height of burner hearth near-infrared radiation energy sensor obtain stove in radiant energy signal be used in combination
In boiler oil control, this method has only taken a section survey radiation energy, and detection method is excessively simple, fails to represent entirely
The radiation energy trans fer of furnace cavity, reliability is not enough.
In addition, a kind of Publication No. CN105117808A entitled " coal mixing combustion optimization method " patent is from economy angle
Degree provides the optimization method of coal mixing combustion, but have ignored the complexity of Actual combustion process in stove, is not directed to boiler flow field
On-line checking information, it is impossible to realize burning optimization.
Utility model patent ZL200420076978.8, entitled " coal-fired boiler interior three-dimensional temperature monitors dress in real time
Put ", using many flame probes arranged in furnace cavity, real-time monitoring hearth flame information recycles numerical calculation and figure
As treatment technology, burning three-dimensional temperature field in stove is obtained, the situation of fuel combustion in burner hearth can be reflected rapidly, but could not consider
Combustion stability and as-fired coal parameter in stove, have not been suitable in unit flexibility operation now.
The content of the invention
The technical problem that the present invention mainly solves the grade present in prior art is based on as-fired coal information there is provided one kind
With the boiler on-line tuning system and method for fire defector.The system and method is believed by monitoring ature of coal before as-fired coal burning in real time
Combustion position and the depth analysis to flame image in breath, stove, on-line optimization boiler coal feeding and air-supply.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals：
A kind of boiler on-line tuning system based on as-fired coal information and fire defector, including：
Coal yard digitalizer, corresponding coal yard area is stored in for gathering to measure to collect into coal data and automatic clustering in real time
Domain；
Coal-air ratio on-line optimization device, for from furnace flame image extract combustion information and with reference to it is described enter coal data
Generate the control signal of wind pushing mechanism and/or feeder structure.
It is preferred that, a kind of above-mentioned boiler on-line tuning system based on as-fired coal information and fire defector, the wind coal
Include than on-line optimization device：
Furnace flame image capture module, for gathering furnace flame using the flame probe (1) for being distributed in burner hearth surrounding
Image, the flame probe (1) is connected with the input of Video segmentation device (3), and the Video segmentation device (3) is output as two-way,
Display (4) and coal-air ratio on-line optimization device are connected respectively.
It is preferred that, a kind of above-mentioned boiler on-line tuning system based on as-fired coal information and fire defector, the wind coal
Include than on-line optimization device：
As-fired coal mark list setup module, enters stove data according to the feeder gathered in real time and calculates real-time as-fired coal synthesis
Mark is single, and the single history as-fired coal with same datum of the real-time as-fired coal synthesis mark is integrated into mark list carries out competing excellent, comprehensive ratio
Relatively provide as-fired coal suggestion.
It is preferred that, a kind of above-mentioned boiler on-line tuning system based on as-fired coal information and fire defector, it is described enter coal
The single setup module of mark recommends Coal Blending Schemes according to following logic：Selection meets preset boundary conditions and coal stock meets threshold value
Coal Blending Schemes optionally, according to history service condition to the alternative carry out ranking, select it is in the top
Several alternatives are used as recommendation Coal Blending Schemes；Wherein, the preset boundary conditions include security, economy, the feature of environmental protection
In one or more.
It is preferred that, a kind of above-mentioned boiler on-line tuning system based on as-fired coal information and fire defector, coal-air ratio exists
Line optimization device includes：
Combustion information extraction module, for extracting combustion information from furnace flame image；The combustion information extracts mould
Block is specifically included：
Color extraction unit, the red, green, blue of each pixel in every width furnace flame image is extracted by video frequency collection card
Color value rI, j, gI, j, bI, j；I is abscissa of the pixel in digital picture, and j is vertical seat of the pixel in digital picture
Mark；
Radiation energy computing unit, furnace radiant energy signal G is calculated based on following formulai,j：
Gi,j=0.11ri,j+0.59gi,j+0.23bi,j,
Real-time gray value computing unit, the average gray value g of image when calculating ith sampling based on following formulaavi：In formula, P-image pixel number；Gj,i- by the formula D ith sampling instant picture element j calculated ash
Angle value；
Fired state computing unit, the image averaging gray value in the t times is calculated based on following formula In formula, T is the number of times of Characteristic Extraction sampling in the t times；Characterize the flat of image for a period of time
Equal brightness, according toDetermine furnace combustion state.
It is preferred that, a kind of above-mentioned boiler on-line tuning system based on as-fired coal information and fire defector, the burning
Information extraction modules also include：
Effective and hyperthermia radiation energy computing unit, flame radiosity energy is calculated based on following formulaWith high-temperature area radiation energy
M and n is along x-axis and the number of pixels in y-axis direction, G in flame image in formulai,jFor the i-th row of jth row picture in image
The radiation energy of vegetarian refreshments, fyFor threshold value set in advance.
K and L is valid pixel number, i.e. x in flame image>It is effective when 0；
Combustion position detection unit, flame effective area Sy and high-temperature area area Sg is calculated with to stove internal combustion based on following formula
Burning situation is detected：
L (x) is thresholding function in formula, and it is defined as：
And the area occupation ratio Gm of image high-temperature region is calculated based on following formula:
A kind of boiler on-line tuning method based on as-fired coal information and fire defector, including：
Coal yard digital management step, corresponding coal is stored in for gathering to measure to collect into coal data and automatic clustering in real time
Field areas；
Coal-air ratio on-line optimization step, for from furnace flame image extract combustion information and with reference to it is described enter coal data
Generate the control signal of wind pushing mechanism and/or feeder structure.
It is preferred that, a kind of above-mentioned boiler on-line tuning method based on as-fired coal information and fire defector, the wind coal
Include than on-line optimization step：Furnace flame IMAQ sub-step and/or as-fired coal mark set up and put sub-step；
Wherein：
The furnace flame IMAQ sub-step, burner hearth fire is gathered using the flame probe (1) for being distributed in burner hearth surrounding
Flame image, delivers to and connects display (4) and coal-air ratio is online respectively after the furnace flame image is split through Video segmentation device (3)
Optimize device；
The as-fired coal mark, which is set up, puts sub-step, is calculated in real time for entering stove data according to the feeder gathered in real time
As-fired coal integrates that mark is single, and the real-time as-fired coal is integrated into the single history as-fired coal with same datum of mark, and to integrate the single progress of mark competing
Excellent, Integrated comparative provides as-fired coal suggestion.
It is preferred that, a kind of above-mentioned boiler on-line tuning method based on as-fired coal information and fire defector, the wind coal
Process than being used to extract combustion information in on-line optimization step from furnace flame image further comprises：
Color extraction sub-step, by video frequency collection card extract each pixel in every width furnace flame image it is red, green,
Blue color value rI, j, gI, j, bI, j；I is abscissa of the pixel in digital picture, and j is vertical seat of the pixel in digital picture
Mark；
Radiation energy calculates sub-step, and furnace radiant energy signal G is calculated based on following formula：
Gi,j=0.11ri,j+0.59gi,j+0.23bi,j,
Real-time gray value calculates sub-step, the average gray value g of image when calculating ith sampling based on following formulaavi：In formula, P-image pixel number；Gj,i- by the formula D ith sampling instant picture element j calculated ash
Angle value；
Fired state calculates sub-step, and the average value of image averaging gray scale in the t times is calculated based on following formulaIn formula, T is the number of times of Characteristic Extraction sampling in the t times；Sign is schemed for a period of time
The mean flow rate of picture.
It is preferred that, a kind of above-mentioned boiler on-line tuning method based on as-fired coal information and fire defector, in addition to：
Effective and hyperthermia radiation can calculate sub-step, and flame radiosity energy is calculated based on following formulaWith high-temperature area radiation
Energy
M and n is along x-axis and the number of pixels in y-axis direction, G in flame image in formulai,jFor the i-th row of jth row picture in image
The radiation energy of vegetarian refreshments, fyFor threshold value set in advance.
K and L is valid pixel number, i.e. x in flame image>It is effective when 0.
Combustion position detects sub-step, and flame effective area Sy and high-temperature area area Sg is calculated with stove based on following formula
Combustion position is detected：
L (x) is thresholding function in formula, and it is defined as：
And the area occupation ratio Gm of image high-temperature region is calculated based on following formula:
Therefore, the invention has the advantages that：1st, digital coal yard can realize the accurate allotment into stove fuel；2nd, utilize
Many flame probes are arranged along furnace height, the on-line monitoring to burner hearth representative region combustion position can be achieved；3rd, flame is passed through
Image processing techniques obtains real-time furnace radiant energy signal, diagnoses hearth combustion stability, and as-fired coal is effectively adjusted
Section, improves the quality of control process；4th, combustion supervision and optimization are carried out according to real-time as-fired coal ature of coal information, it is with strong points,
Boiler can be improved in the operation stability for using non dipper and can also be under coal blending ature of coal surging condition, in unit flexibility
Higher economy and stability can be kept when operation and depth peak regulation.
Brief description of the drawings
Fig. 1 is furnace flame image schematic diagram；
Fig. 2 is the control system schematic diagram of the present invention.
In figure, flame probe 1 transmits the coaxial cable 2 of flame image, Video segmentation device 3, display 4, coal-air ratio optimization
Processing system 5, coal yard digital management system 6, wind pushing mechanism 7, feeder structure 8.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
Embodiment 1
A kind of boiler on-line tuning system and method detected based on as-fired coal information and combustion flame, including coal yard numeral
Burning detecting system, image processing in change system, stove, to coal control unit, air blowing control unit.
Coal-air ratio control system is from coal yard digitization system data acquisition as-fired coal ature of coal information；Coal yard digitization system is remembered
Record, allocate real-time as-fired coal ature of coal information and fuel flow rate, and data interaction is carried out with coal-air ratio regulating system.
Coal-air ratio control system obtains radiant energy signal in stove by Combustion detection device in stove.
Burning detecting system includes flame probe, communication line, Video segmentation device, display and computer in stove.Flame
Probe is distributed in burner hearth surrounding different height, and probe number N is 2~8, and each flame probe is connected to Video segmentation device, video point
The N width images that N number of flame probe is shot are synthesized piece image and exported to display and flame Image Processing computer by cutter.
Burning detecting system extracts radiation energy information from flame image in stove, comprises the following steps：
A. as-fired coal mark, which is set up, puts：Collection feeder (and machine supplying powder) enters stove data in real time, counts entering in every five minutes
Stove coal blend ratio and amount quality and price, collecting weighted calculation, to show that the as-fired coal of current time point integrates mark single, then with history same datum
Under the as-fired coal of (same load section, the combination of identical coal, identical coal price) integrate that mark is single to carry out competing excellent, Integrated comparative is provided
As-fired coal is advised.
Input picture is converted to digital picture by B. burning image digital processing, computer by analog image；
C. extract color value, computer by video frequency collection card extract each pixel in every width digital picture it is red, green,
Blue color value rI, j, gI, j, bI, j；I is abscissa of the pixel in digital picture, and j is vertical seat of the pixel in digital picture
Mark；
D. radiation of burner hearth energy is calculated, with average gray value gaviRepresent.Burner hearth grey scale signal G calculation formula are as follows：
Gi,j=0.11ri,j+0.59gi,j+0.23bi,j,
E. Flame Image Characteristics amount, the average gray value g of image when ith is sampledaviIt is calculated as follows：
P-image pixel number；Gj,i- by the formula D ith sampling instant picture element j calculated gray value.
The average value of image averaging gray scale in the F.t times
T-the number of times that Characteristic Extraction is sampled in the t times；Characterize the mean flow rate of image for a period of time, physics
Light intensity in meaning with flame combustion is corresponding, can characterize certain fired state.
G1. flame radiosity energyWith high-temperature area radiation energyIt is respectively calculated as follows：
M and n is along x-axis and the number of pixels in y-axis direction, G in flame image in formulai,jFor the i-th row of jth row picture in image
The radiation energy of vegetarian refreshments, fyFor threshold value set in advance.
K and L is valid pixel number, i.e. x in flame image>It is effective when 0.
G2. flame effective area Sy and high-temperature area area Sg is defined to detect combustion position in stove.Flame has
Effect area Sy and high-temperature area area Sg is respectively calculated as follows：
L (x) is thresholding function in formula, and it is defined as：
G3. the area occupation ratio Gm of image high-temperature region is calculated as follows：
Embodiment 2
To be better understood from the content of the present embodiment, herein by taking 200MW quadrangle tangential circle pulverized-coal fired boiler as an example, to this
The scheme of embodiment is described as follows：
1st, collection SIS systems feeder (and machine supplying powder) enters stove data in real time, and the as-fired coal kind counted in every five minutes is matched somebody with somebody
Quality and price is when measured, collects weighted calculation and show that the as-fired coal of current time point integrates mark list, then it is (identical negative with history same datum
Lotus section, the combination of identical coal, identical coal price) as-fired coal integrate that mark is single to carry out competing excellent ranking, Integrated comparative simultaneously provides system
Coal suggestion is given in system optimization；According to the as-fired coal synthesis mark list that weighted calculation is drawn is collected, with reference to the sale of electricity coal of the poor system acquisition of consumption
Consume data, Integrated comparative and provide system optimization give coal suggestion.
2nd, Coal Blending Schemes.For the Optimizing Suggestions provided in step 1, system recommendation Coal Blending Schemes are carried out according to following logic
Set：
A, scheme meets conditions setting (security, economy, the feature of environmental protection)；
B, the coal for participating in Coal Blending Schemes is in zone of reasonableness in current inventory structures, if (being less than certain very little
Boundary number), then abandon the program；
C, according to the principle of history scheme using effect optimal (cost is minimum or mark is single minimum), the competing excellent recommendation of Integrated comparative
First two.
By the Coal Blending Schemes of above-mentioned setting, by digital coal yard management system to the buying of fuel, storage, using complete
Life cycle management and control, obtains the real-time quantization information of as-fired coal.This TV station 200MW boilers are according to coal yard digitlization allotment furnace coal weight
For three layers totally 12 burners give coal 89t/h altogether.
3rd, system is provided with 8 burner hearth high temperature ccd image flame probes.Burner hearth perforate absolute altitude is interval in 11.0~28.0M,
Bottom burner absolute altitude is 12.0M, and top layer burner absolute altitude is 21.5M.Wherein, the installation of burner bottom and burner region
Hole is respectively in the middle part of left and right water-cooling wall and forward and backward water-cooling wall, and remaining aspect is opened in corner.The hearth combustion space monitored is
Region of the absolute altitude between 11.0m to 28.4m, i.e. region more than furnace hopper, below furnace arch, furnace nose.Utilize 4 between the region
Layer passageway, 4 layers of flame probe of design arrangement, each layer Probe arrangement (peephole position) near burner hearth corner.
4th, every flame probe sets pixel to synthesize piece image for 30 × 30,8 flame probes and (sees fire containing full burner hearth
TV, totally 9 width picture) total pixel be 8100, due to 8 flame probes arranged along along burner hearth different height and position, its
Detection range covers whole furnace cavity, therefore, furnace radiant energy signal, energy obtained from being calculated by 8 flame images
Reflect hearth combustion operating mode completely.
5th, by real-time radiation energy signal feeding coal-air ratio regulation and control loop after, with reference to from coal yard digitization system download it is real-time
As-fired coal ature of coal information and fuel flow rate, using above-mentioned detection and analysis, adjust the action to coal and air-supply loop, realize depth
Economical as-fired coal and burner hearth surely fire the purpose of regulation and control during peak regulation.
According to unit load selected from coal yard digitization system to should load default ature of coal as under the operating mode
As-fired coal.A kind of utilization furnace radiant energy signal of the present invention controls method to coal, using furnace radiant energy signal as entering stove
The feedback information of coal, is incorporated into wind coal control loop, diagnoses the hearth combustion stability under real-time, economic as-fired coal operating mode.Spoke
Penetrating the step of energy signal diagnoses combustion stability in stove is：
A. furnace radiant energy signal is gathered in real time, and acquisition time was at intervals of 0.1 second；
B. the number of times T=50 that Characteristic Extraction is sampled；
C. average gray value is more than 65, and hearth combustion can remain stable.Set elemental area variance threshold values 0.05, radiation energy
Variance 20, both trigger out combustion stability early warning simultaneously.Given threshold radiation energy is 55, elemental area 0.6, when both low
In respective threshold value, while when radiation energy variance and elemental area variance are higher than respective threshold value again, you can judge all flames lost
Accident.
Detection and analysis shows that the 200MW boilers are in the case of normal as-fired coal, because coal-air ratio tissue is unreasonable in stove,
Combustion stability in stove is had a strong impact on.Radiant energy signal occurs in that peak value at two, the big ups and downs exactly because of combustion instability
As a result；In flexibility operation, it is important guarantee that the coordination of as-fired coal and boiler flow field, which is monitored and controlled,.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (10)
1. a kind of boiler on-line tuning system based on as-fired coal information and fire defector, it is characterised in that including：
Coal yard digitalizer, corresponding coal yard region is stored in for gathering to measure to collect into coal data and automatic clustering in real time；
Coal-air ratio on-line optimization device, for from furnace flame image extract combustion information and with reference to it is described enter coal data generation
The control signal of wind pushing mechanism and/or feeder structure.
2. a kind of boiler on-line tuning system based on as-fired coal information and fire defector according to claim 1, it is special
Levy and be, the coal-air ratio on-line optimization device includes：
Furnace flame image capture module, for gathering furnace flame image using the flame probe (1) for being distributed in burner hearth surrounding,
The flame probe (1) is connected with the input of Video segmentation device (3), and the Video segmentation device (3) is output as two-way, connects respectively
Connect display (4) and coal-air ratio on-line optimization device.
3. a kind of boiler on-line tuning system based on as-fired coal information and fire defector according to claim 1, it is special
Levy and be, the coal-air ratio on-line optimization device includes：
As-fired coal mark list setup module, enters stove data according to the feeder gathered in real time and calculates real-time as-fired coal synthesis mark
It is single, the real-time as-fired coal is integrated and marks single competing excellent, Integrated comparative of the history as-fired coal single progress of synthesis mark with same datum
Provide as-fired coal suggestion.
4. a kind of boiler on-line tuning system based on as-fired coal information and fire defector according to claim 3, it is special
Levy and be, it is described enter coal mark list setup module according to following logic recommend Coal Blending Schemes：Selection meet preset boundary conditions and
Coal stock meets the Coal Blending Schemes of threshold value optionally, and the alternative is arranged according to history service condition
Name, selects several alternatives in the top as recommendation Coal Blending Schemes；Wherein, the preset boundary conditions include safety
One or more in property, economy, the feature of environmental protection.
5. a kind of boiler on-line tuning system based on as-fired coal information and fire defector according to claim 1, it is special
Levy and be, coal-air ratio on-line optimization device includes：
Combustion information extraction module, for extracting combustion information from furnace flame image；The combustion information extraction module tool
Body includes：
Color extraction unit, the red, green, blue color of each pixel in every width furnace flame image is extracted by video frequency collection card
Value rI, j, gI, j, bI, j；I is abscissa of the pixel in digital picture, and j is ordinate of the pixel in digital picture；
Radiation energy computing unit, furnace radiant energy signal G is calculated based on following formulai,j：
Gi,j=0.11ri,j+0.59gi,j+0.23bi,j,
Real-time gray value computing unit, the average gray value g of image when calculating ith sampling based on following formulaavi：In formula, P-image pixel number；Gj,i- by the formula D ith sampling instant picture element j calculated ash
Angle value；
Fired state computing unit, the image averaging gray value in the t times is calculated based on following formula Formula
In, T is the number of times of Characteristic Extraction sampling in the t times；The mean flow rate of image for a period of time is characterized, according toReally
Determine furnace combustion state.
6. a kind of boiler on-line tuning system based on as-fired coal information and fire defector according to claim 5, it is special
Levy and be, the combustion information extraction module also includes：
Effective and hyperthermia radiation energy computing unit, flame radiosity energy is calculated based on following formulaWith high-temperature area radiation energy
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M and n is along x-axis and the number of pixels in y-axis direction, G in flame image in formulai,jFor the i-th row of jth row pixel in image
Radiation energy, fyFor threshold value set in advance；
<mrow>
<mi>g</mi>
<mrow>
<mo>(</mo>
<mi>x</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<msub>
<mi>G</mi>
<mrow>
<mi>i</mi>
<mo>,</mo>
<mi>j</mi>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mi>x</mi>
<mo>></mo>
<mn>0</mn>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<mi>x</mi>
<mo>&le;</mo>
<mn>0</mn>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
</mrow>
K and L is valid pixel number, i.e. x in flame image>It is effective when 0；
Combustion position detection unit, flame effective area Sy and high-temperature area area Sg is calculated with to the shape that burnt in stove based on following formula
Condition is detected：
<mrow>
<msub>
<mi>S</mi>
<mi>y</mi>
</msub>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>m</mi>
</munderover>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<mi>L</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>G</mi>
<mrow>
<mi>i</mi>
<mo>,</mo>
<mi>j</mi>
</mrow>
</msub>
<mo>-</mo>
<mover>
<msub>
<mi>f</mi>
<mi>y</mi>
</msub>
<mo>&OverBar;</mo>
</mover>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<msub>
<mi>S</mi>
<mi>g</mi>
</msub>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>m</mi>
</munderover>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<mi>L</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>G</mi>
<mrow>
<mi>i</mi>
<mo>,</mo>
<mi>j</mi>
</mrow>
</msub>
<mo>-</mo>
<mover>
<msub>
<mi>f</mi>
<mi>g</mi>
</msub>
<mo>&OverBar;</mo>
</mover>
<mo>)</mo>
</mrow>
</mrow>
L (x) is thresholding function in formula, and it is defined as：
<mrow>
<mi>L</mi>
<mrow>
<mo>(</mo>
<mi>x</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mn>1</mn>
</mtd>
<mtd>
<mrow>
<mi>x</mi>
<mo>></mo>
<mn>0</mn>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<mi>x</mi>
<mo>&le;</mo>
<mn>0</mn>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
</mrow>
And the area occupation ratio Gm of image high-temperature region is calculated based on following formula:
<mrow>
<msub>
<mi>G</mi>
<mi>m</mi>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>S</mi>
<mi>g</mi>
</msub>
<msub>
<mi>S</mi>
<mi>y</mi>
</msub>
</mfrac>
<mo>.</mo>
</mrow>
7. a kind of boiler on-line tuning method based on as-fired coal information and fire defector, it is characterised in that including：
Coal yard digital management step, corresponding coal yard area is stored in for gathering to measure to collect into coal data and automatic clustering in real time
Domain；
Coal-air ratio on-line optimization step, for from furnace flame image extract combustion information and with reference to it is described enter coal data generation
The control signal of wind pushing mechanism and/or feeder structure.
8. a kind of boiler on-line tuning method based on as-fired coal information and fire defector according to claim 7, it is special
Levy and be, the coal-air ratio on-line optimization step includes：Furnace flame IMAQ sub-step and/or as-fired coal mark set up and put son
Step；
Wherein：
The furnace flame IMAQ sub-step, furnace flame figure is gathered using the flame probe (1) for being distributed in burner hearth surrounding
Picture, delivers to and connects display (4) and coal-air ratio on-line optimization respectively after the furnace flame image is split through Video segmentation device (3)
Device；
The as-fired coal mark, which is set up, puts sub-step, calculates for entering stove data according to the feeder that gathers in real time and enters stove in real time
Coal integrates that mark is single, and the real-time as-fired coal is integrated into the single history as-fired coal with same datum of mark, and to integrate the single progress of mark competing excellent,
Integrated comparative provides as-fired coal suggestion.
9. a kind of boiler on-line tuning method based on as-fired coal information and fire defector according to claim 7, it is special
Levy and be, the process for being used to extract combustion information in the coal-air ratio on-line optimization step from furnace flame image is further wrapped
Include：
Color extraction sub-step, the red, green, blue face of each pixel in every width furnace flame image is extracted by video frequency collection card
Colour rI, j, gI, j, bI, j；I is abscissa of the pixel in digital picture, and j is ordinate of the pixel in digital picture；
Radiation energy calculates sub-step, and furnace radiant energy signal G is calculated based on following formula：
Gi,j=0.11ri,j+0.59gi,j+0.23bi,j,
Real-time gray value calculates sub-step, the average gray value g of image when calculating ith sampling based on following formulaavi：In formula, P-image pixel number；Gj,i- by the formula D ith sampling instant picture element j calculated ash
Angle value；
Fired state calculates sub-step, and the average value of image averaging gray scale in the t times is calculated based on following formula In formula, T is the number of times of Characteristic Extraction sampling in the t times；Characterize the flat of image for a period of time
Equal brightness.
10. a kind of boiler on-line tuning method based on as-fired coal information and fire defector according to claim 9, it is special
Levy and be, in addition to：
Effective and hyperthermia radiation can calculate sub-step, and flame radiosity energy is calculated based on following formulaWith high-temperature area radiation energy
<mrow>
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<mi>f</mi>
<mo>&OverBar;</mo>
</mover>
<mi>y</mi>
</msub>
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<munderover>
<mo>&Sigma;</mo>
<mrow>
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</mrow>
<mi>m</mi>
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<mo>&Sigma;</mo>
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<mo>,</mo>
</mrow>
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<mi>y</mi>
</msub>
<mo>)</mo>
</mrow>
<mo>/</mo>
<mi>L</mi>
<mo>,</mo>
</mrow>
M and n is along x-axis and the number of pixels in y-axis direction, G in flame image in formulai,jFor the i-th row of jth row pixel in image
Radiation energy, fyFor threshold value set in advance.
<mrow>
<mi>g</mi>
<mrow>
<mo>(</mo>
<mi>x</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<msub>
<mi>G</mi>
<mrow>
<mi>i</mi>
<mo>,</mo>
<mi>j</mi>
</mrow>
</msub>
</mtd>
<mtd>
<mrow>
<mi>x</mi>
<mo>></mo>
<mn>0</mn>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<mi>x</mi>
<mo>&le;</mo>
<mn>0</mn>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
</mrow>
K and L is valid pixel number, i.e. x in flame image>It is effective when 0.
Combustion position detects sub-step, and flame effective area Sy and high-temperature area area Sg is calculated with to being burnt in stove based on following formula
Situation is detected：
<mrow>
<msub>
<mi>S</mi>
<mi>y</mi>
</msub>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
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<mn>1</mn>
</mrow>
<mi>m</mi>
</munderover>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<mi>L</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>G</mi>
<mrow>
<mi>i</mi>
<mo>,</mo>
<mi>j</mi>
</mrow>
</msub>
<mo>-</mo>
<mover>
<msub>
<mi>f</mi>
<mi>y</mi>
</msub>
<mo>&OverBar;</mo>
</mover>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<msub>
<mi>S</mi>
<mi>g</mi>
</msub>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>m</mi>
</munderover>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<mi>L</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>G</mi>
<mrow>
<mi>i</mi>
<mo>,</mo>
<mi>j</mi>
</mrow>
</msub>
<mo>-</mo>
<mover>
<msub>
<mi>f</mi>
<mi>g</mi>
</msub>
<mo>&OverBar;</mo>
</mover>
<mo>)</mo>
</mrow>
</mrow>
L (x) is thresholding function in formula, and it is defined as：
<mrow>
<mi>L</mi>
<mrow>
<mo>(</mo>
<mi>x</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mn>1</mn>
</mtd>
<mtd>
<mrow>
<mi>x</mi>
<mo>></mo>
<mn>0</mn>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mn>0</mn>
</mtd>
<mtd>
<mrow>
<mi>x</mi>
<mo>&le;</mo>
<mn>0</mn>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
</mrow>
And the area occupation ratio Gm of image high-temperature region is calculated based on following formula:
<mrow>
<msub>
<mi>G</mi>
<mi>m</mi>
</msub>
<mo>=</mo>
<mfrac>
<msub>
<mi>S</mi>
<mi>g</mi>
</msub>
<msub>
<mi>S</mi>
<mi>y</mi>
</msub>
</mfrac>
<mo>.</mo>
</mrow>
4
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Cited By (9)
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| CN110195860A (en) * | 2019-06-03 | 2019-09-03 | 吉林大学 | A kind of boiler corner tangential firing flame kernel offset adjustment method |
| CN110568766A (en) * | 2019-10-22 | 2019-12-13 | 华北电力大学 | Boiler control system based on combustion layer temperature and online optimization method |
| CN110689176A (en) * | 2019-09-17 | 2020-01-14 | 国网湖南省电力有限公司 | Method, system and medium for optimizing output measurement of double-inlet and double-outlet coal mill |
| CN110686272A (en) * | 2019-10-22 | 2020-01-14 | 华北电力大学 | On-line soft measurement method for coal amount entering furnace based on combustor video signal |
| CN111445142A (en) * | 2020-03-26 | 2020-07-24 | 华润电力技术研究院有限公司 | Fuel blending combustion evaluation method, system and device |
| CN112178632A (en) * | 2020-10-31 | 2021-01-05 | 山东省药用玻璃股份有限公司 | Coal-sand mixed use method for starting circulating fluidized bed double-bed furnace |
| CN113091036A (en) * | 2021-03-01 | 2021-07-09 | 神华神东电力有限责任公司 | System and method for controlling boiler contamination |
| CN114046533A (en) * | 2021-08-31 | 2022-02-15 | 汉谷云智(武汉)科技有限公司 | Pulverized coal furnace combustion optimization method based on flame analysis optimization |
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| CN110689176B (en) * | 2019-09-17 | 2022-03-11 | 国网湖南省电力有限公司 | Method, system and medium for optimizing output measurement of double-inlet and double-outlet coal mill |
| CN110689176A (en) * | 2019-09-17 | 2020-01-14 | 国网湖南省电力有限公司 | Method, system and medium for optimizing output measurement of double-inlet and double-outlet coal mill |
| CN110568766A (en) * | 2019-10-22 | 2019-12-13 | 华北电力大学 | Boiler control system based on combustion layer temperature and online optimization method |
| CN110686272A (en) * | 2019-10-22 | 2020-01-14 | 华北电力大学 | On-line soft measurement method for coal amount entering furnace based on combustor video signal |
| CN111445142A (en) * | 2020-03-26 | 2020-07-24 | 华润电力技术研究院有限公司 | Fuel blending combustion evaluation method, system and device |
| CN111445142B (en) * | 2020-03-26 | 2023-04-18 | 华润电力技术研究院有限公司 | Fuel blending combustion evaluation method, system and device |
| CN112178632A (en) * | 2020-10-31 | 2021-01-05 | 山东省药用玻璃股份有限公司 | Coal-sand mixed use method for starting circulating fluidized bed double-bed furnace |
| CN112178632B (en) * | 2020-10-31 | 2022-05-20 | 山东省药用玻璃股份有限公司 | Coal and sand mixed use method for starting circulating fluidized bed double-bed furnace |
| CN113091036A (en) * | 2021-03-01 | 2021-07-09 | 神华神东电力有限责任公司 | System and method for controlling boiler contamination |
| CN114046533A (en) * | 2021-08-31 | 2022-02-15 | 汉谷云智(武汉)科技有限公司 | Pulverized coal furnace combustion optimization method based on flame analysis optimization |
| CN114046533B (en) * | 2021-08-31 | 2024-03-12 | 汉谷云智(武汉)科技有限公司 | Pulverized coal furnace combustion optimization method based on flame analysis optimization |
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