CN110343820A - Annealing furnace combustion system, annealing furnace combustion air flow adjusting method and device - Google Patents
Annealing furnace combustion system, annealing furnace combustion air flow adjusting method and device Download PDFInfo
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 191
- 238000000137 annealing Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 41
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 239000003034 coal gas Substances 0.000 claims abstract description 26
- 239000000779 smoke Substances 0.000 claims abstract description 5
- 239000003517 fume Substances 0.000 claims description 9
- 230000008901 benefit Effects 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 239000003245 coal Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 8
- 239000000446 fuel Substances 0.000 abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 239000002912 waste gas Substances 0.000 abstract 5
- 230000006870 function Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention relates to the technical field of annealing processes, in particular to an annealing furnace combustion system, an annealing furnace combustion air flow adjusting method and a device, comprising the following steps: the system comprises a combustion-supporting fan, a combustion-supporting air flow valve, a combustion-supporting air flow detection unit, a coal gas source, a coal gas flow valve, a coal gas flow detection unit, a radiant tube, a waste gas collection chamber and a smoke exhaust device; the combustion-supporting fan is connected with one end of a combustion-supporting air flow detection unit through a combustion-supporting air flow valve, and the other end of the combustion-supporting air flow detection unit is connected with a waste gas collection chamber through a radiant tube; the gas source is connected with one end of a gas flow detection unit through a gas flow valve, and the other end of the gas flow detection unit is connected with the waste gas collection chamber through a radiant tube; the smoke exhaust device is communicated with the waste gas collection chamber. Therefore, the combustion-supporting air flow under low power can reach the set value of the system, the air-fuel ratio of the burner can reach the set value of the system, the excess air coefficient is reduced, the heat loss is reduced, and the residual oxygen in the waste gas is reduced.
Description
Technical field
The present invention relates to annealing process technical field more particularly to annealing furnace combustion systems, annealing furnace combustion air flow
Adjusting method and device.
Background technique
Vertical annealing furnace bringing-up section burner generallys use ratio control model, the gas flow and combustion air flow of burner
Setting value obtained according to air-fuel ratio model, and use cross-over control mode, that is, the aperture for passing through control flow control valve is real
Now to the adjustment of gas flow, the revolving speed by controlling combustion fan realizes the adjustment to combustion air flow.For combustion-supporting sky
For the adjustment of throughput, with the reduction of thermic load, coefficient of excess air is gradually increased.In the prior art, work as thermic load
When less than a certain particular value, even if combustion fan is completely closed, it still will appear combustion air actual flow and set greater than system
The case where constant flow.It thus will increase coefficient of excess air, thermal losses caused to increase, so that in the exhaust gas that burner generates
Remaining oxygen is higher.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State annealing furnace combustion system, annealing furnace combustion-supporting air flow amount adjustment method and the device of problem.
First aspect according to the present invention, the present invention provide a kind of annealing furnace combustion system, the system comprises: it is combustion-supporting
Blower, combustion air flow valve, combustion-supporting air flow amount detection unit, coal gas source, gas flow valve, gas flow detection unit,
Radiant tube, exhaust plenum and fume extractor；
The combustion fan is connected by one end of the combustion air flow valve and the combustion-supporting air flow amount detection unit
It connects, the other end of the combustion-supporting air flow amount detection unit is connect by the radiant tube with the exhaust plenum；
The coal gas source is connect by the gas flow valve with one end of the gas flow detection unit, the coal gas
The other end of flow detection unit is connect by the radiant tube with the exhaust plenum；
The fume extractor is connected to the exhaust plenum；
Wherein, the combustion fan is used for for providing combustion air, the combustion air flow valve to the combustion-supporting sky
The flow of gas carries out proportional integral differential adjusting, and the combustion-supporting air flow amount detection unit is used for the flow to the combustion air
It is detected, the coal gas source is for providing coal gas, and the gas flow valve is for being adjusted the flow of the coal gas, institute
Gas flow detection unit is stated for detecting to the flow of the coal gas, the combustion air and the coal gas are in the spoke
It penetrates under the action of pipe and enters the exhaust plenum after burning, the gas in the exhaust plenum is arranged by the fume extractor
Out.
The second aspect according to the present invention, the present invention provide a kind of annealing furnace combustion-supporting air flow amount adjustment method, application
Annealing furnace combustion system described in first aspect, which comprises
The revolving speed of the combustion fan is obtained, and obtains the actual air flow of the combustion air；
Determine the flow deviation between the actual air flow and specified combustion air flow；
Judge whether the revolving speed of the combustion fan is greater than specified minimum rotation speed of fan, and judges that the flow deviation is
It is no to be greater than deviation limit, wherein the range of the deviation limit is 30~50Nm3/h；
If the revolving speed of the combustion fan is less than or equal to the specified minimum rotation speed of fan, and, the flow deviation is big
In the deviation limit, the combustion air flow valve current valve aperture is obtained；
Characteristic based on the combustion fan and the combustion air flow valve, at the beginning of determining the first initial yield value, second
Beginning yield value and third initial yield value, first initial yield value, the second initial yield value and third initial yield value exist
Greater than 0 and be less than or equal to 10 in the range of value, and, first initial yield value be greater than second initial yield value, institute
The second initial yield value is stated greater than the third initial yield value；
According to the current valve aperture, first initial yield value, second initial yield value and the third
Initial yield value carries out PID control parameter to the combustion air flow valve.
Preferably, described according to the current valve aperture, first initial yield value, second initial yield value
With the third initial yield value, PID control parameter is carried out to the combustion air flow valve, comprising:
If the current valve aperture is greater than the first aperture, the range of first aperture is 50-100%, utilizes first
Control gain value carries out proportional plus integral control to the combustion air flow valve, and first control gain value is equal to described first
Initial yield value.
Preferably, described according to the current valve aperture, first initial yield value, second initial yield value
With the third initial yield value, PID control parameter is carried out to the combustion air flow valve, comprising:
If the current valve aperture is less than or equal to the first aperture and is greater than the second aperture, the range of first aperture
Range for 50-100%, second aperture is 30-50%, using the second control gain value to the combustion air flow valve
Proportional plus integral control is carried out, second control gain value is obtained by following formula: (g1-g2)·(k-k2)/(k1-k2)+g2,
Wherein, g1For first initial yield value, g2For second initial yield value, k1For first aperture, k2It is described
Two apertures, k are the current valve aperture.
Preferably, described according to the current valve aperture, first initial yield value, second initial yield value
With the third initial yield value, PID control parameter is carried out to the combustion air flow valve, comprising:
If the current valve aperture is less than or equal to the second aperture and is greater than third aperture, the range of second aperture
For 30-50%, the range of the third aperture is 0-30%, using third control gain value to the combustion air flow valve into
Row proportional plus integral control, the third control gain value are obtained by following formula: (g2-g3)·(k-k3)/(k2-k3)+g3,
In, g2For second initial yield value, g3For the third initial yield value, k1For first aperture, k2It is described second
Aperture, k3For the third aperture, k is the current valve aperture.
Preferably, described according to the current valve aperture, first initial yield value, second initial yield value
With the third initial yield value, PID control parameter is carried out to the combustion air flow valve, comprising:
If the current valve aperture is less than or equal to third aperture, the range of the third aperture is 0-30%, is utilized
4th control gain value carries out proportional plus integral control to the combustion air flow valve, and the 4th control gain value is equal to described
Third initial yield value.
Preferably, the range of the valve opening lower limit of the combustion air flow valve is 5-10%.
In terms of third according to the present invention, the present invention provides a kind of annealing furnace combustion-supporting air flow quantity regulating device, applies
In the annealing furnace combustion system as described in first aspect, described device includes:
First obtains module, for obtaining the revolving speed of the combustion fan, and the practical sky of the acquisition combustion air
Throughput；
First determining module, for determining that the flow between the actual air flow and specified combustion air flow is inclined
Difference；
Judgment module, for judging whether the revolving speed of the combustion fan is greater than specified minimum rotation speed of fan, and judgement
Whether the flow deviation is greater than deviation limit, wherein the range of the deviation limit is 30~50Nm3/h；
Second obtains module, if the revolving speed for the combustion fan is less than or equal to the specified minimum rotation speed of fan,
And the flow deviation is greater than the deviation limit, obtains the combustion air flow valve current valve aperture；
Second determining module determines first for the characteristic based on the combustion fan and the combustion air flow valve
Initial yield value, the second initial yield value and third initial yield value, first initial yield value, the second initial yield value and
Third initial yield value value in the range of being greater than 0 and being less than or equal to 10, and, first initial yield value is greater than described the
Two initial yield values, second initial yield value are greater than the third initial yield value；
Control module, for according to the current valve aperture, first initial yield value, second initial gain
Value and the third initial yield value carry out PID control parameter to the combustion air flow valve.
The 4th aspect according to the present invention, the present invention provide a kind of computer readable storage medium, are stored thereon with meter
Calculation machine program, which is characterized in that the method and step as described in first aspect is realized when the program is executed by processor.
According to the present invention the 5th aspect, the present invention provide a kind of computer equipment, including memory, processor and deposit
Store up the computer program that can be run on a memory and on a processor, which is characterized in that the processor executes described program
Method and step of the Shi Shixian as described in first aspect.
Annealing furnace combustion system according to the present invention and combustion-supporting air flow amount adjustment method, by annealing furnace combustion system
In add combustion air flow valve, and then can use combustion air flow valve to carry out proportional integration to the flow of combustion air micro-
Divide and adjust, and is no longer to be adjusted merely with combustion fan to combustion air.Passing through combustion air flow valve to combustion air
When flow carries out proportional integral differential adjusting, by specified minimum rotation speed of fan and actual air flow and specified combustion-supporting air flow
Flow deviation between amount is as triggering factors.First, it is determined that whether the revolving speed of combustion fan is greater than specified minimum rotation speed of fan,
And judge whether the flow deviation between actual air flow and specified combustion air flow is greater than deviation limit, deviation limit
Range be 30~50Nm3/h.If the revolving speed of combustion fan is less than or equal to the specified minimum rotation speed of fan, and, flow is inclined
Difference be greater than deviation limit, according to combustion air flow valve current valve aperture, the first initial yield value, the second initial yield value and
Third initial yield value carries out PID control parameter to combustion air flow valve.First initial yield value, the second initial increasing
Benefit value and third initial yield value are determined according to the characteristic of combustion fan and combustion air flow valve.First initial yield value,
Two initial yield values and third initial yield value value in the range of being greater than 0 and being less than or equal to 10, and, the first initial yield value
Greater than the second initial yield value, the second initial yield value is greater than third initial yield value.It, can by executing above-mentioned adjustment process
Guarantee that combustion air flow can achieve default value under low-power, sets so that the air-fuel ratio of burner can reach system
Definite value reduces coefficient of excess air, reduces thermal losses, eventually reduces the remaining oxygen in exhaust gas.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, identical component is indicated with identical reference pattern.In the accompanying drawings:
Fig. 1 shows the structure chart of annealing furnace combustion system in first embodiment of the invention；
Fig. 2 shows the flow charts of annealing furnace combustion-supporting air flow amount adjustment method in second embodiment of the invention；
Fig. 3 shows the relationship in second embodiment of the invention between valve opening and PID control parameter parameter
Figure；
Fig. 4 shows the structural schematic diagram of annealing furnace combustion-supporting air flow quantity regulating device in third embodiment of the invention；
Fig. 5 shows the structural schematic diagram of computer equipment in fifth embodiment of the invention.
Wherein, 1 is combustion fan, and 2 be combustion air flow valve, and 3 be combustion-supporting air flow amount detection unit, and 4 be coal gas source,
5 be gas flow valve, and 6 be gas flow detection unit, and 7 be radiant tube, and 8 be exhaust plenum, and 9 be fume extractor.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
First embodiment of the invention provides a kind of annealing furnace combustion system, as shown in Figure 1, the system comprises: combustion air
Machine 1, combustion air flow valve 2, combustion-supporting air flow amount detection unit 3, coal gas source 4, gas flow valve 5, gas flow detection are single
Member 6, radiant tube 7, exhaust plenum 8 and fume extractor 9.
Above structure has following connection relationship: combustion fan 1 is examined by combustion air flow valve 2 and combustion air flow
One end connection of unit 3 is surveyed, the other end of combustion-supporting air flow amount detection unit 3 is connect by radiant tube 7 with exhaust plenum 8.
Specifically, gas flow pipe road can be added between combustion fan 1 and radiant tube 7, and in the gas flow pipe road sequentially
Combustion air flow valve 2 and combustion-supporting air flow amount detection unit 3 are set.Coal gas source 4 passes through gas flow valve 5 and gas flow
One end of detection unit 6 connects, and the other end of gas flow detection unit 6 is connect by radiant tube 7 with exhaust plenum 8.Row
Cigarette device 9 is connected to exhaust plenum 8.
In embodiments of the present invention, combustion fan 1 is used for for providing combustion air, combustion air flow valve 2 to combustion-supporting
The flow of air carries out proportional integral differential adjusting, and combustion-supporting air flow amount detection unit 3 is used to carry out the flow of combustion air
Detection, coal gas source 4 is for providing coal gas, and gas flow valve 5 is for being adjusted the flow of coal gas, gas flow detection unit
6 for detecting the flow of coal gas, combustion air and coal gas burn under the action of radiant tube 7 after into exhaust plenum
8, the gas in exhaust plenum 8 is discharged by fume extractor 9.
Further, in embodiments of the present invention, fume extractor 9 includes smoke exhaust fan and chimney, and chimney passes through smoke exhaust fan
It is connect with exhaust plenum 8.Radiant tube 7 is W type radiant tube 7.
Annealing furnace combustion system provided in an embodiment of the present invention, by adding combustion air flow valve 2, and then by combustion-supporting
Air flow valve 2 carries out proportional integral differential adjusting to the flow of combustion air, and is no longer merely with combustion fan 1 to combustion-supporting
Air conditioning can guarantee that combustion air flow can achieve default value under low-power, so that the air-fuel ratio of burner
Default value can be reached, reduce coefficient of excess air, reduce thermal losses, eventually reduce the remaining oxygen in exhaust gas.
Based on the same inventive concept, second embodiment of the invention also provides a kind of annealing furnace combustion air flow adjusting side
Method is applied in the annealing furnace combustion system that first embodiment provides, as shown in Figure 2, which comprises
Step 201: obtaining the revolving speed of combustion fan, and obtain the actual air flow of combustion air.
Specifically, in step 201, the current revolving speed of combustion fan is obtained in real time, which can use vfanIt indicates.
Meanwhile the current air mass flow of combustion air, the air mass flow namely reality are obtained by combustion-supporting air flow amount detection unit in real time
Border air mass flow.Actual air flow can use pvairIt indicates.
After getting the actual air flow of combustion air, step 202 is executed: determining actual air flow and specified
Flow deviation between combustion air flow.
Specifically, specified combustion air flow is preset parameter, can use spairIt indicates, specified combustion-supporting sky
Throughput can be calculated according to air-fuel ratio model by following formula (1):
spair=PLAM·P0/GasLCV·r (1)
Wherein, in formula (1), spairFor specified combustion air flow, PLAMFor annealing furnace bringing-up section heating power, add
The range of thermal power is that 0~100%, P is annealing furnace bringing-up section burner rated power, GasLCVFor annealing furnace bringing-up section combustion gas heat
Value, r are actual production air-fuel ratio set, and r is related to gas component, control stability and burner number of faults.
Further, after obtaining actual air flow and specified combustion air flow, by actual air flow with it is specified
It is poor that combustion air flow is made, and obtains flow deviation.Flow deviation can use pvair-spairIt indicates.
After the revolving speed and flow deviation for obtaining combustion fan, execute step 203: judging the revolving speed of combustion fan is
It is not no to be greater than specified minimum rotation speed of fan, and judge whether flow deviation is greater than deviation limit, wherein the range of deviation limit is
30~50Nm3/h。
Specifically, specified minimum rotation speed of fan is the minimum speed of combustion fan, is determined by the performance of combustion fan itself
It is fixed, in general, specified minimum rotation speed of fan can take 3-10%.Specified minimum rotation speed of fan can be indicated with α.In addition, for stream
Deviation is measured there are deviation limit, deviation limit is used to determine whether to execute subsequent PID control parameter.Deviation limit can
To be indicated with β.The embodiment of the present invention can also while whether the revolving speed for judging combustion fan is greater than specified minimum rotation speed of fan
Judge whether flow deviation is greater than deviation limit.
Further, after completing step 203, it will execute step 204: if the revolving speed of combustion fan is less than or equal to volume
Fixed minimum rotation speed of fan, and, flow deviation is greater than deviation limit, obtains combustion air flow valve current valve aperture.
Specifically, the first judging result and the second judging result, the first judgement knot can be obtained by executing step 203
Fruit corresponds to the process for judging whether the revolving speed of combustion fan is greater than specified minimum rotation speed of fan, and the second judging result, which corresponds to, to be sentenced
Whether disconnected flow deviation is greater than the process of deviation limit.When the first judging result characterization combustion fan revolving speed be less than or equal to α,
And second judging result characterization flow deviation be greater than β when, obtain combustion air flow valve current valve aperture.For the first judgement
As a result subsequent to use Poewr control method in the prior art, the present invention with other situations belonging to the second judging result
This is not construed as limiting.
Step 205: the characteristic based on combustion fan and combustion air flow valve, at the beginning of determining the first initial yield value, second
Beginning yield value and third initial yield value, the first initial yield value, the second initial yield value and third initial yield value are being greater than 0
And value in the range of being less than or equal to 10, and, the first initial yield value is greater than the second initial yield value, and the second initial yield value is big
In third initial yield value.
Specifically, the first initial yield value can use g1It indicates, the second initial yield value can use g2It indicates, at the beginning of third
Beginning yield value can use g3It indicates.g1、g2、g3It is related to annealing furnace combustion system, it can be according to the combustion-aid air pipe of combustion fan
The open degree characteristic curve of diameter and combustion air flow valve determines.Meanwhile determining g1、g2And g3When, g1Greater than g2, and g2It is greater than
g3。g1、g2And g3Value in the range of being greater than 0 and being less than or equal to 10.
For further, according to the difference of the open degree characteristic curve of combustion air flow valve, g1、g2And g3It can choose not
Same value.For example, when combustion air flow fluctuation is less than or equal to 20%, g15 can be taken；When combustion air flow fluctuation is less than
Or it is equal to 10%, g18 can be taken；When combustion air flow fluctuation is less than or equal to 5%, g110 can be taken.
After determining the first initial yield value, the second initial yield value and third initial yield value, in conjunction with combustion-supporting sky
Throughput valve current valve aperture executes step 206: according to current valve aperture, the first initial yield value, the second initial gain
Value and third initial yield value carry out PID control parameter to combustion air flow valve.It should be noted that step 205
It can be executed in any time before step 206.
For step 206, there is the first aperture, the second aperture and third aperture in embodiments of the present invention.First
The range of aperture is 50-100%, and the range of the second aperture is 30-50%, and the range of third aperture is 0-30%.First aperture
K can be used1It indicates, the second aperture can use k2It indicates, third aperture can use k3It indicates.In embodiments of the present invention, current valve
Door aperture can be indicated with k, current valve aperture and the first aperture, the second aperture and third aperture are compared, exist with
Lower four kinds of situations.
In the first scenario, if k is greater than k1(k1< k), combustion air flow valve is carried out using the first control gain value
Proportional plus integral control.First control gain value is equal to g1。
In the latter case, if k is less than or equal to k1And it is greater than k2(k2< k≤k1), utilize the second control gain value pair
Combustion air flow valve carries out proportional plus integral control.Second control gain value is obtained by following formula: (g1-g2)·(k-k2)/
(k1-k2)+g2。
In a third case, if k is less than or equal to k2And it is greater than k3(k3< k≤k2), utilize third control gain value pair
Combustion air flow valve carries out proportional plus integral control.Third control gain value is obtained by following formula: (g2-g3)·(k-k3)/
(k2-k3)+g3。
In the fourth case, if k is less than or equal to k3(k≤k3), using the 4th control gain value to combustion air flow
Valve carries out proportional plus integral control.4th control gain value is equal to g3。
The adjustment process of above-mentioned four kinds of situations will be further illustrated below.
The first situation belongs to coarse mode, and in this mode, the PID control parameter of combustion air flow valve is adopted
With high-gain values (the first control gain value), when preventing annealing furnace bringing-up section thermic load from increasing, combustion air air demand cannot and
Shi Zengjia generates CO content in exhaust gas and increases after caused gas-fired, there are second-time burning risks, additionally it is possible to prevent because of heating
Section thermic load reduces, and combustion air air demand cannot be reduced in time, and the O2 content liter in exhaust gas is generated after caused gas-fired
Height, concentration over-standard problem after caused conversion.
Second situation belongs to fine mode, and in this mode, the PID control parameter of combustion air flow valve is adopted
With low gain value (the second control gain value), when preventing annealing furnace bringing-up section thermic load from increasing, combustion air air demand was responded
Fastly, O2 content in exhaust gas is generated after caused gas-fired to increase, and reduces heating rate, additionally it is possible to prevent because of bringing-up section thermic load
It reduces, combustion air air demand generates CO content raising in exhaust gas after reducing too fast caused gas-fired, and there are second-time burnings
Risk.
The third situation belongs to fine tuning mode, and in this mode, the PID control parameter of combustion air flow valve is adopted
With very low gain value (third control gain value), stable coefficient of excess air is ensured.
4th kind of situation belongs to fine mode minimum value, in this case, once valve opening is less than or equal to k3, using
Four control gain value will not change as the aperture of valve changes again.
In embodiments of the present invention, for the aperture of combustion air flow valve, the valve opening upper limit is 100%, is
Cigarette blower stall is avoided, valve opening lower limit is 5~10%.Further, for PID control parameter, control ginseng
Number includes yield value (GAIN) and the time of integration (TN).Relationship between GAIN and TN and valve opening is as shown in Figure 3.GAIN with
Valve opening is directly proportional, and valve opening is bigger, and GAIN value is bigger.With the reduction of valve opening, the variation of air-fuel air mass flow is got over
Greatly, needing at this time, which reduces GAIN value, avoids controller overshoot.TN is directly proportional to valve opening, and valve opening is bigger, and TN value is bigger.
Further, for how to carry out PID control parameter to combustion air flow valve comprising to combustion air
The adjustment parameter of flow valve is adjusted, and adjustment parameter includes the valve speed of response, valve response frequency and valve response cycle
At least one of.
Based on the same inventive concept, third embodiment of the invention also provides a kind of annealing furnace combustion air flow adjusting dress
It sets, applies in the annealing furnace combustion system that first embodiment provides, as shown in figure 4, described device includes:
First obtains module 401, for obtaining the revolving speed of the combustion fan, and the reality of the acquisition combustion air
Air mass flow；
First determining module 402, for determining the flow between the actual air flow and specified combustion air flow
Deviation；
Judgment module 403 for judging whether the revolving speed of the combustion fan is greater than specified minimum rotation speed of fan, and is sentenced
Whether the flow deviation of breaking is greater than deviation limit, wherein the range of the deviation limit is 30~50Nm3/h；
Second obtains module 404, if the revolving speed for the combustion fan is less than or equal to the specified minimum blower and turns
Speed, and, the flow deviation is greater than the deviation limit, obtains the combustion air flow valve current valve aperture；
Second determining module 405 determines for the characteristic based on the combustion fan and the combustion air flow valve
One initial yield value, the second initial yield value and third initial yield value, first initial yield value, the second initial yield value
With third initial yield value in the range of being greater than 0 and being less than or equal to 10 value, and, first initial yield value is greater than described
Second initial yield value, second initial yield value are greater than the third initial yield value；
Control module 406 is used for according to the current valve aperture, first initial yield value, described second initially
Yield value and the third initial yield value carry out PID control parameter to the combustion air flow valve.
Wherein, control module 406 includes:
First control unit, if being greater than the first aperture for the current valve aperture, the range of first aperture is
50-100% carries out proportional plus integral control, first control to the combustion air flow valve using the first control gain value
Yield value is equal to first initial yield value.
Wherein, control module 406 includes:
Second control unit, if being less than or equal to the first aperture for the current valve aperture and being greater than the second aperture,
The range of first aperture is 50-100%, and the range of second aperture is 30-50%, utilizes the second control gain value pair
The combustion air flow valve carries out proportional plus integral control, and second control gain value is obtained by following formula: (g1-
g2)·(k-k2)/(k1-k2)+g2, wherein g1For first initial yield value, g2For second initial yield value, k1For institute
State the first aperture, k2For second aperture, k is the current valve aperture.
Wherein, control module 406 includes:
Third control unit, if being less than or equal to the second aperture for the current valve aperture and being greater than third aperture,
The range of second aperture is 30-50%, and the range of the third aperture is 0-30%, using third control gain value to institute
It states combustion air flow valve and carries out proportional plus integral control, the third control gain value is obtained by following formula: (g2-g3)·
(k-k3)/(k2-k3)+g3, wherein g2For second initial yield value, g3For the third initial yield value, k1It is described
One aperture, k2For second aperture, k3For the third aperture, k is the current valve aperture.
Wherein, control module 406 includes:
4th control unit, if being less than or equal to third aperture for the current valve aperture, the third aperture
Range is 0-30%, using the 4th control gain value to the combustion air flow valve carry out proportional plus integral control, the described 4th
Control gain value is equal to the third initial yield value.
Wherein, the range of the valve opening lower limit of the combustion air flow valve is 5-10%.
Based on the same inventive concept, fourth embodiment of the invention also provides a kind of computer readable storage medium, deposits thereon
Computer program is contained, method and step described in aforementioned first embodiment is realized when which is executed by processor.
Based on the same inventive concept, fifth embodiment of the invention additionally provides a kind of computer equipment, as shown in figure 5, being
Convenient for explanation, only parts related to embodiments of the present invention are shown, disclosed by specific technical details, please refers to the present invention
Embodiment method part.The computer equipment can be include mobile phone, tablet computer, PDA (Personal Digital
Assistant, personal digital assistant), POS (Point of Sales, point-of-sale terminal), any terminal device such as vehicle-mounted computer,
By taking computer equipment is mobile phone as an example:
Fig. 5 shows the block diagram of part-structure relevant to computer equipment provided in an embodiment of the present invention.With reference to figure
5, which includes: memory 501 and processor 502.It will be understood by those skilled in the art that being counted shown in Fig. 5
It calculates machine equipment structure and does not constitute the restriction to computer equipment, may include than illustrating more or fewer components or group
Close certain components or different component layouts.
It is specifically introduced below with reference to each component parts of the Fig. 5 to computer equipment:
Memory 501 can be used for storing software program and module, and processor 502 is stored in memory 501 by operation
Software program and module, thereby executing various function application and data processing.Memory 501 can mainly include storage journey
Sequence area and storage data area, wherein storing program area can the (ratio of application program needed for storage program area, at least one function
Such as sound-playing function, image player function) etc.；It storage data area can storing data (such as audio data, phone directory etc.)
Deng.In addition, memory 501 may include high-speed random access memory, it can also include nonvolatile memory, for example, at least
One disk memory, flush memory device or other volatile solid-state parts.
Processor 502 is the control centre of computer equipment, by running or executing the software being stored in memory 501
Program and/or module, and the data being stored in memory 501 are called, perform various functions and handle data.Optionally,
Processor 502 may include one or more processing units；Preferably, processor 502 can integrate application processor and modulation /demodulation
Processor, wherein the main processing operation system of application processor, user interface and application program etc., modem processor master
Handle wireless communication.
In embodiments of the present invention, processor 502 included by the computer equipment can have in previous embodiment and appoint
Function corresponding to one method and step.
It should be noted that provided herein algorithm and display not with any certain computer, virtual system or other
Equipment is inherently related.Various general-purpose systems can also be used together with teachings based herein.As described above, this is constructed
Structure required by class system is obvious.In addition, the present invention is also not directed to any particular programming language.It should be understood that
It can use various programming languages and realize summary of the invention described herein, and the description done above to language-specific is
In order to disclose the best mode of carrying out the invention.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of the various inventive aspects,
Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
Shield the present invention claims features more more than feature expressly recited in each claim.More precisely, as following
Claims reflect as, inventive aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
All as a separate embodiment of the present invention.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments mean it is of the invention
Within the scope of and form different embodiments.For example, in the following claims, embodiment claimed is appointed
Meaning one of can in any combination mode come using.
Various component embodiments of the invention can be implemented in hardware, or to run on one or more processors
Software module realize, or be implemented in a combination thereof.It will be understood by those of skill in the art that can be used in practice
Microprocessor or digital signal processor (DSP) realize one of some or all components according to embodiments of the present invention
A little or repertoire.The present invention is also implemented as setting for executing some or all of method as described herein
Standby or program of device (for example, computer program and computer program product).It is such to realize that program of the invention deposit
Storage on a computer-readable medium, or may be in the form of one or more signals.Such signal can be from because of spy
It downloads and obtains on net website, be perhaps provided on the carrier signal or be provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of several different elements and being come by means of properly programmed computer real
It is existing.In the unit claims listing several devices, several in these devices can be through the same hardware branch
To embody.The use of word first, second, and third does not indicate any sequence.These words can be explained and be run after fame
Claim.
Claims (10)
1. a kind of annealing furnace combustion system, which is characterized in that the system comprises: combustion fans, combustion air flow valve, combustion-supporting
Air mass flow detection unit, coal gas source, gas flow valve, gas flow detection unit, radiant tube, exhaust plenum and smoke evacuation dress
It sets；
The combustion fan is connect by the combustion air flow valve with one end of the combustion-supporting air flow amount detection unit, institute
The other end for stating combustion-supporting air flow amount detection unit is connect by the radiant tube with the exhaust plenum；
The coal gas source is connect by the gas flow valve with one end of the gas flow detection unit, the gas flow
The other end of detection unit is connect by the radiant tube with the exhaust plenum；
The fume extractor is connected to the exhaust plenum；
Wherein, the combustion fan is used for for providing combustion air, the combustion air flow valve to the combustion air
Flow carries out proportional integral differential adjusting, and the combustion-supporting air flow amount detection unit is used to carry out the flow of the combustion air
Detection, the coal gas source is for providing coal gas, and the gas flow valve is for being adjusted the flow of the coal gas, the coal
Air-flow amount detection unit is for detecting the flow of the coal gas, and the combustion air and the coal gas are in the radiant tube
Under the action of burn after enter the exhaust plenum, the gas in the exhaust plenum is discharged by the fume extractor.
2. a kind of annealing furnace combustion-supporting air flow amount adjustment method, which is characterized in that be applied to annealing furnace as described in claim 1
Combustion system, which comprises
The revolving speed of the combustion fan is obtained, and obtains the actual air flow of the combustion air；
Determine the flow deviation between the actual air flow and specified combustion air flow；
Judge whether the revolving speed of the combustion fan is greater than specified minimum rotation speed of fan, and judges whether the flow deviation is big
In deviation limit, wherein the range of the deviation limit is 30~50Nm3/h；
If the revolving speed of the combustion fan is less than or equal to the specified minimum rotation speed of fan, and, the flow deviation is greater than institute
Deviation limit is stated, the combustion air flow valve current valve aperture is obtained；
Characteristic based on the combustion fan and the combustion air flow valve determines the first initial yield value, the second initial increasing
Benefit value and third initial yield value, first initial yield value, the second initial yield value and third initial yield value are being greater than 0
And be less than or equal to 10 in the range of value, and, first initial yield value be greater than second initial yield value, described second
Initial yield value is greater than the third initial yield value；
It is initial according to the current valve aperture, first initial yield value, second initial yield value and the third
Yield value carries out PID control parameter to the combustion air flow valve.
3. method according to claim 2, which is characterized in that it is described according to the current valve aperture, it is described first initial
Yield value, second initial yield value and the third initial yield value carry out ratio product to the combustion air flow valve
Divide differential control, comprising:
If the current valve aperture is greater than the first aperture, the range of first aperture is 50-100%, utilizes the first control
Yield value carries out proportional plus integral control to the combustion air flow valve, and it is initial that first control gain value is equal to described first
Yield value.
4. method according to claim 2, which is characterized in that it is described according to the current valve aperture, it is described first initial
Yield value, second initial yield value and the third initial yield value carry out ratio product to the combustion air flow valve
Divide differential control, comprising:
If the current valve aperture is less than or equal to the first aperture and is greater than the second aperture, the range of first aperture is
50-100%, the range of second aperture are 30-50%, using the second control gain value to the combustion air flow valve into
Row proportional plus integral control, second control gain value are obtained by following formula: (g1-g2)·(k-k2)/(k1-k2)+g2,
In, g1For first initial yield value, g2For second initial yield value, k1For first aperture, k2It is described second
Aperture, k are the current valve aperture.
5. method according to claim 2, which is characterized in that it is described according to the current valve aperture, it is described first initial
Yield value, second initial yield value and the third initial yield value carry out ratio product to the combustion air flow valve
Divide differential control, comprising:
If the current valve aperture is less than or equal to the second aperture and is greater than third aperture, the range of second aperture is
The range of 30-50%, the third aperture are 0-30%, are carried out using third control gain value to the combustion air flow valve
Proportional plus integral control, the third control gain value are obtained by following formula: (g2-g3)·(k-k3)/(k2-k3)+g3,
In, g2For second initial yield value, g3For the third initial yield value, k1For first aperture, k2It is described second
Aperture, k3For the third aperture, k is the current valve aperture.
6. method according to claim 2, which is characterized in that it is described according to the current valve aperture, it is described first initial
Yield value, second initial yield value and the third initial yield value carry out ratio product to the combustion air flow valve
Divide differential control, comprising:
If the current valve aperture is less than or equal to third aperture, the range of the third aperture is 0-30%, utilizes the 4th
Control gain value carries out proportional plus integral control to the combustion air flow valve, and the 4th control gain value is equal to the third
Initial yield value.
7. the method as described in any claim in claim 2-6, which is characterized in that the valve of the combustion air flow valve
The range of door aperture lower limit is 5-10%.
8. a kind of annealing furnace combustion-supporting air flow quantity regulating device, which is characterized in that be applied to annealing furnace as described in claim 1
Combustion system, described device include:
First obtains module, for obtaining the revolving speed of the combustion fan, and the actual air stream of the acquisition combustion air
Amount；
First determining module, for determining the flow deviation between the actual air flow and specified combustion air flow；
Judgment module, for judging whether the revolving speed of the combustion fan is greater than specified minimum rotation speed of fan, and described in judgement
Whether flow deviation is greater than deviation limit, wherein the range of the deviation limit is 30~50Nm3/h；
Second obtains module, if the revolving speed for the combustion fan is less than or equal to the specified minimum rotation speed of fan, and, institute
Flow deviation is stated greater than the deviation limit, obtains the combustion air flow valve current valve aperture；
Second determining module determines that first is initial for the characteristic based on the combustion fan and the combustion air flow valve
Yield value, the second initial yield value and third initial yield value, first initial yield value, the second initial yield value and third
Initial yield value value in the range of being greater than 0 and being less than or equal to 10, and, first initial yield value is greater than at the beginning of described second
Beginning yield value, second initial yield value are greater than the third initial yield value；
Control module, for according to the current valve aperture, first initial yield value, second initial yield value and
The third initial yield value carries out PID control parameter to the combustion air flow valve.
9. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is held by processor
The method and step as described in any claim in claim 2-7 is realized when row.
10. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that the processor is realized when executing described program such as any claim institute in claim 2-7
The method and step stated.
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