CN107246606A - The progress control method and control system of grate firing boiler - Google Patents
The progress control method and control system of grate firing boiler Download PDFInfo
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- CN107246606A CN107246606A CN201710606920.1A CN201710606920A CN107246606A CN 107246606 A CN107246606 A CN 107246606A CN 201710606920 A CN201710606920 A CN 201710606920A CN 107246606 A CN107246606 A CN 107246606A
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- firing boiler
- grate firing
- fire box
- box temperature
- intake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B60/00—Combustion apparatus in which the fuel burns essentially without moving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/002—Regulating air supply or draught using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
- F23N2225/16—Measuring temperature burner temperature
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Incineration Of Waste (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
A kind of progress control method of grate firing boiler of disclosure, including：In the case where the load of grate firing boiler keeps stable, perform first and operate, with the intake for the burner hearth for reducing grate firing boiler；If the fire box temperature of grate firing boiler rises in the given time, first is performed again and is operated, until the fire box temperature of grate firing boiler no longer rises, the intake of burner hearth is maintained into intake corresponding with highest fire box temperature.Based on progress control method disclosed in the present application, it is possible to increase the thermal efficiency of grate firing boiler.In addition, a kind of control system of grate firing boiler is also disclosed in the application.
Description
Technical field
The application belongs to boiler technology field, more particularly to grate firing boiler progress control method and control system.
Background technology
Boiler is broadly divided into four kinds according to combustion system：Grate firing boiler, room burner, cyclone furnace and fluidizing combustion furnace.Layer combustion
Boiler refers to the boiler that fuel burns on fire grate, specifically：Fuel is placed on fixed or mobile fire grate, forms uniform
, with certain thickness fuel bed, be passed through air from the bottom of fire grate, fuel combustion heat release amount on fire grate has been burnt
Coal dregs fall into burner hearth.
Fuel in grate firing boiler is placed on fire grate, is formed uniformly, with certain thickness fuel bed.In grate firing boiler
In running, because fuel bed has certain thickness, this leads to not ensure being sufficiently mixed for fuel and air, in order that
Fuel can fully burn, at present by the way of the excessive air of supply.Applicant's investigation is found, most of at present industrial
The excess air coefficient of grate firing boiler is between 2 to 3.5, and even up to 4, considerably beyond normal value (1.2 to 1.75).It is excessive
Air after substantial amounts of heat is absorbed as flue gas is discharged, cause substantial amounts of thermal loss, reduce the thermal effect of grate firing boiler
Rate.
To those skilled in the art, the thermal efficiency of grate firing boiler how is improved, is technical problem urgently to be resolved hurrily.
The content of the invention
In view of this, the purpose of the application is the progress control method and control system for providing a kind of grate firing boiler, with
Improve the thermal efficiency of grate firing boiler.
To achieve the above object, the application provides following technical scheme：
On the one hand, a kind of progress control method of grate firing boiler of disclosure, including：
In the case where the load of the grate firing boiler keeps stable, perform first and operate, to reduce the grate firing boiler
Burner hearth intake；
If the fire box temperature of the grate firing boiler rises in the given time, first operation is performed again, directly
Fire box temperature to the grate firing boiler no longer rises, and the intake of the burner hearth is maintained corresponding with highest fire box temperature
Intake.
Optionally, in above-mentioned progress control method, after the operation of execution first, in addition to：
If the fire box temperature of the grate firing boiler declines in the given time, perform second and operate, it is described to improve
The intake of the burner hearth of grate firing boiler；
If the fire box temperature of the grate firing boiler rises in the given time, second operation is performed again, directly
Fire box temperature to the grate firing boiler no longer rises, and the intake of the burner hearth is maintained corresponding with highest fire box temperature
Intake.
Optionally, the grate firing boiler is configured with air blower and air-introduced machine；It is described to perform the in above-mentioned progress control method
One operation, including：
Reduce the running frequency of the air blower；
Or, reduce the running frequency of the air-introduced machine；
Or, reduce the running frequency of the air blower and the air-introduced machine.
Optionally, in above-mentioned progress control method, the execution second is operated, including：
Improve the running frequency of the air blower；
Or, improve the running frequency of the air-introduced machine；
Or, improve the running frequency of the air blower and the air-introduced machine.
On the other hand, a kind of control system of grate firing boiler of disclosure, including：
For the temperature sensor for the fire box temperature for detecting the grate firing boiler；
The controller being connected with the temperature sensor, the controller is used for：Kept in the load of the grate firing boiler
In the case of stable, perform first and operate, with the intake for the burner hearth for reducing the grate firing boiler；If institute in the given time
The fire box temperature for stating grate firing boiler rises, then first operation is performed again, until the fire box temperature of the grate firing boiler is not
Rise again, the intake of the burner hearth is maintained into intake corresponding with highest fire box temperature.
Optionally, in above-mentioned control system, the controller is additionally operable to：
After the first operation is performed, if the fire box temperature of the grate firing boiler declines in the given time, the is performed
Two operations, with the intake for the burner hearth for improving the grate firing boiler；If the burner hearth temperature of the grate firing boiler in the given time
Degree rises, then second operation is performed again, until the fire box temperature of the grate firing boiler no longer rises, by the burner hearth
Intake maintains intake corresponding with highest fire box temperature.
Optionally, the grate firing boiler is configured with air blower and air-introduced machine；In above-mentioned control system, the controller is being held
The operating aspect of row first, specifically for：Reduce the running frequency of at least one in the air blower and the air-introduced machine.
Optionally, in above-mentioned control system, the controller is performing the second operating aspect, specifically for：Improve described
The running frequency of at least one in air blower and the air-introduced machine.
As can be seen here, the application has the beneficial effect that：
The progress control method of grate firing boiler disclosed in the present application, in the case where the load of grate firing boiler keeps stable,
By performing the intake of the first operation reduction burner hearth, if in the scheduled time internal furnace temperature after performing the first operation
Rise, then further reduce the intake of burner hearth, until fire box temperature no longer rises, the intake of burner hearth is maintained and highest
The corresponding intake of fire box temperature.It can be seen that, progress control method disclosed in the present application, using fire box temperature as control according to
According to by adjusting the intake of burner hearth, dynamically to find optimal excess air coefficient, so that grate firing boiler reaches most preferably
Fired state and heat loss is minimum, improve the thermal efficiency of grate firing boiler, and then reduce the Coal-fired capacity of grate firing boiler, reduce cigarette
Gas discharge capacity.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of application, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of structural representation of grate firing boiler disclosed in the present application；
Fig. 2 is a kind of flow chart of the progress control method of grate firing boiler disclosed in the present application；
Fig. 3 is the flow chart of the progress control method of another grate firing boiler disclosed in the present application；
Fig. 4 is the excess air coefficient of grate firing boiler and the graph of relation of fire box temperature；
Fig. 5 is the flow chart of the progress control method of another grate firing boiler disclosed in the present application；
Fig. 6 is a kind of structure chart of the control system of grate firing boiler disclosed in the present application.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In accompanying drawing, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is only
Only it is some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of the application protection.
The application provides a kind of progress control method and control device of grate firing boiler, to improve the thermal effect of grate firing boiler
Rate.
For the ease of understanding technical scheme disclosed in the present application, the structure of grate firing boiler is carried out with reference to Fig. 1 brief
Explanation.
Fire grate 102, layering coal supply equipment 103 and temperature sensor 104 are provided with the burner hearth 101 of grate firing boiler 100.Figure
Fire grate 102 in 1 is specially chain furnace grate, drives chain furnace grate to move by other equipment, just can be by the coal burnt
Breeze dregs falls into the bottom of burner hearth 101.
In addition, grate firing boiler 100 is also configured with air blower 200, air-introduced machine 300 and air preheater 400.Air blower 200
The air air inlet preheater 400 of blowout is preheated, and the air after preheating enters the burner hearth 101 of grate firing boiler 100.Air-introduced machine
300 can discharge the flue gas in burner hearth 101, and burner hearth 101 is maintained certain negative pressure so that the fuel on fire grate 102 is obtained
To good burning.
Referring to Fig. 2, Fig. 2 is a kind of flow chart of the progress control method of grate firing boiler disclosed in the present application.This method bag
Include：
Step S1：In the case where the load of grate firing boiler keeps stable, perform first and operate, to reduce grate firing boiler
The intake of burner hearth.
Step S2：If the fire box temperature of grate firing boiler rises in the given time, first is performed again and is operated, until
The fire box temperature of grate firing boiler no longer rises, and the intake of the burner hearth is maintained into air intake corresponding with highest fire box temperature
Amount.
The caloric value of grate firing boiler is showed by fire box temperature, under stationary conditions, the efficiency of combustion of boiler
It is one-to-one relation with fire box temperature, so the efficiency of combustion that boiler is weighed from fire box temperature is more accurate, sensitive
With it is effective.It can be obtained according to the thermal balance of grate firing boiler：
B(Qnet,ar+cartr)-(Q2+Q3+Q4+Q5+Q6)=ε σ ArT1 4
In above-mentioned formula：
B is grate firing boiler maximum coal-supplying amount hourly, and unit is ton hour；
Qnet,arFor coal low heat value, unit for kilojoule per kilogram；
cartrFor latent heat of vaporization amount, unit for kilojoule per kilogram；
Q2For heat loss due to exhaust gas, unit for kilojoule per kilogram；
Q3For fuel gas heat loss due to incomplete combustion, unit for kilojoule per kilogram；
Q4For heat loss of imperfect solid combustion, unit for kilojoule per kilogram；
Q5For radiation loss, unit for kilojoule per kilogram；
Q6For heat loss due to sensible heat in slag, unit for kilojoule per kilogram；
σ is heat transfer coefficient；
ε is the correction factor of heat transfer coefficient；
ArAccumulated for the heating surface of boiler proper of grate firing boiler, unit is m2；
T1For the burner hearth measuring point temperature of grate firing boiler, be approximately equal to the fire box temperature of grate firing boiler, unit for DEG C.
From above-mentioned formula it can be seen that, in the case that in hour, maximum coal-supplying amount B is certain, heat loss is more, then layer combustion pot
The fire box temperature of stove is lower.Wherein, radiation loss Q5With heat loss due to sensible heat in slag Q6It is all smaller, it can not consider, improve
The direct method of fire box temperature is reduction (Q2+Q3+Q4) value.The excess air coefficient of grate firing boiler is bigger, then heat loss due to exhaust gas
Q2It is bigger, and fuel gas heat loss due to incomplete combustion Q3With fixed heat loss due to incomplete combustion Q4Decrease.
In order that the fuel in grate firing boiler reaches optimal combustion state, the excess air coefficient of burner hearth is supplied according to " row
Cigarette heat loss Q2, fuel gas heat loss due to incomplete combustion Q3With fixed heat loss due to incomplete combustion Q4And it is minimum " principle it is true
It is fixed, i.e.,：As excess air coefficient α=αiWhen (αiFor a certain value), if heat loss due to exhaust gas Q2, fuel gas imperfect combustion heat waste
Lose Q3With fixed heat loss due to incomplete combustion Q4And it is minimum, and fire box temperature is also highest, then α nowiTo be optimal
Excess air coefficient.The problem of therefore, it can heat loss, the raising thermal efficiency that will reduce grate firing boiler, which is converted to, seeks most blast furnace
Optimal excess air coefficient under bore temperature.
The excess air coefficient and fire box temperature of grate firing boiler can approx regard T ash=-klα2+k2α+k3, wherein k1、
k2、k3For constant.Excess air coefficient α and fire box temperature ThIt is a unimodal curve, as shown in figure 4, by adjusting excess air
Coefficient, it is possible to so that fire box temperature reaches maximum or some faces in domain near maximum, the at this moment heat of grate firing boiler
Efficiency is also higher.
In the case where the load of grate firing boiler keeps stable, operated by performing first, to reduce the stove of grate firing boiler
The intake of thorax, that is, reduce the excess air coefficient of grate firing boiler.If the scheduled time after the first operation is performed
Interior, the fire box temperature of grate firing boiler rises, and shows that current excess air coefficient is larger, has exceeded optimal excess air coefficient,
Therefore the first operation can be performed again, further the intake of the burner hearth of reduction grate firing boiler, until the burner hearth of grate firing boiler
Temperature no longer rises and (keeps stable or decline).When the fire box temperature of grate firing boiler no longer rises and (keeps stable or decline)
When, it is optimal excess air coefficient or closely optimal excess air system to show the current excess air coefficient of grate firing boiler
Number, intake corresponding with highest fire box temperature is maintained by the intake of burner hearth.
, all can be by current fire box temperature and the stove after preceding once execution first operation every time after the operation of execution first
Bore temperature is compared, to determine the change of fire box temperature.
If after n-th (n for integer) more than 1 performs the first operation, the fire box temperature of grate firing boiler with (n-1)th time
Identical or both the difference of the fire box temperature after the first operation is performed in the difference range of permission, then current intake is
For intake corresponding with highest fire box temperature, current intake is maintained.
If after n-th (n is the integer more than 1) performs the first operation, the fire box temperature of grate firing boiler is less than (n-1)th
Fire box temperature after the operation of execution first, and both differences beyond the difference range allowed, then (n-1)th execution first is operated
Identified intake is intake corresponding with highest fire box temperature afterwards, and the intake of burner hearth is maintained into (n-1)th execution
Intake determined by first operation.
The progress control method of grate firing boiler disclosed in the present application, in the case where the load of grate firing boiler keeps stable,
By performing the intake of the first operation reduction burner hearth, if in the scheduled time internal furnace temperature after performing the first operation
Rise, then further reduce the intake of burner hearth, until fire box temperature no longer rises, the intake of burner hearth is maintained and highest
The corresponding intake of fire box temperature.It can be seen that, progress control method disclosed in the present application, using fire box temperature as control according to
According to by adjusting the intake of burner hearth, dynamically to find optimal excess air coefficient, so that grate firing boiler reaches most preferably
Fired state and heat loss is minimum, improve the thermal efficiency of grate firing boiler, and then reduce the Coal-fired capacity of grate firing boiler, reduce cigarette
Gas discharge capacity.
Referring to Fig. 3, Fig. 3 is a kind of flow chart of the progress control method of grate firing boiler disclosed in the present application.This method bag
Include：
Step S1：In the case where the load of grate firing boiler keeps stable, perform first and operate, to reduce grate firing boiler
The intake of burner hearth.
Step S2：If the fire box temperature of grate firing boiler rises in the given time, first is performed again and is operated, until
The fire box temperature of grate firing boiler no longer rises, and the intake of the burner hearth is maintained into air intake corresponding with highest fire box temperature
Amount.
Step S3：After the first operation is performed, if the fire box temperature of the grate firing boiler declines in the given time,
Perform second to operate, with the intake for the burner hearth for improving the grate firing boiler.
Step S4：If the fire box temperature of grate firing boiler rises in the given time, second is performed again and is operated, until
The fire box temperature of grate firing boiler no longer rises, and the intake of the burner hearth is maintained into air intake corresponding with highest fire box temperature
Amount.
Perform after the first operation, if the fire box temperature of grate firing boiler declines in the given time, show in first time
Current excess air coefficient is smaller, also not up to optimal excess air coefficient, therefore performs the second operation, to improve layer combustion pot
The intake of the burner hearth of stove, that is, increase the excess air coefficient of grate firing boiler.
If within the scheduled time after performing the second operation, the fire box temperature of grate firing boiler rises, then performs again
Second operation, with the intake for the burner hearth for further improving grate firing boiler, (is protected until the fire box temperature of grate firing boiler no longer rises
Keep steady fixed or decline).When the fire box temperature of grate firing boiler no longer rises and (keeps stable or decline), show grate firing boiler
Current excess air coefficient optimal excess air coefficient for optimal excess air coefficient or closely, by the air intake of burner hearth
Amount maintains intake corresponding with highest fire box temperature.
It should be noted that in the intake for the rear hearth for performing the second operation first, should be greater than performing first for the first time
The intake of the front furnace of operation.
, all can be by current fire box temperature and the stove after preceding once execution second operation every time after the operation of execution second
Bore temperature is compared, to determine the change of fire box temperature.
If after n-th (n for integer) more than 1 performs the second operation, the fire box temperature of grate firing boiler with (n-1)th time
Identical or both the difference of the fire box temperature after the second operation is performed in the difference range of permission, then current intake is
For intake corresponding with highest fire box temperature, current intake is maintained.
If after n-th (n is the integer more than 1) performs the second operation, the fire box temperature of grate firing boiler is less than (n-1)th
Fire box temperature after the operation of execution second, and both differences beyond the difference range allowed, then (n-1)th execution second is operated
Identified intake is intake corresponding with highest fire box temperature afterwards, and the intake of burner hearth is maintained into (n-1)th execution
Intake determined by second operation.
The progress control method of the application grate firing boiler disclosed above, stable situation is kept in the load of grate firing boiler
Under, the first operation is first carried out to reduce the intake of burner hearth, if fire box temperature rises, the air intake of burner hearth is further reduced
Amount, until fire box temperature no longer rises, intake corresponding with highest fire box temperature is maintained by the intake of burner hearth, if
Scheduled time internal furnace temperature drop after the first operation is performed first, then perform the second operation to improve the air intake of burner hearth
Amount, if fire box temperature rises, further improves the intake of burner hearth, until fire box temperature no longer rises, by entering for burner hearth
Air quantity maintains intake corresponding with highest fire box temperature.The application progress control method disclosed above, by burner hearth temperature
Degree is as control foundation, by adjusting the intake of burner hearth, dynamically to find optimal excess air coefficient, so that layer fires
Boiler reaches optimal fired state and heat loss is minimum, improves the thermal efficiency of grate firing boiler, and then reduce grate firing boiler
Coal-fired capacity, reduces smoke discharge amount.
Fig. 5 is participated in, Fig. 5 is the flow chart of the progress control method of another grate firing boiler disclosed in the present application.This method
Including：
Step S51：In the case where the load of grate firing boiler keeps stable, perform second and operate, to improve grate firing boiler
Burner hearth intake.
Step S52：If the fire box temperature of grate firing boiler rises in the given time, second is performed again and is operated, directly
Fire box temperature to grate firing boiler no longer rises, by the intake of the burner hearth maintain it is corresponding with highest fire box temperature enter
Air quantity.
Step S53：After the second operation is performed, if the fire box temperature of the grate firing boiler declines in the given time,
Then perform first to operate, with the intake for the burner hearth for improving the grate firing boiler.
Step S54：If the fire box temperature of grate firing boiler rises in the given time, first is performed again and is operated, directly
Fire box temperature to grate firing boiler no longer rises, by the intake of the burner hearth maintain it is corresponding with highest fire box temperature enter
Air quantity.
If performed in first time in the scheduled time after the second operation, the fire box temperature of grate firing boiler rises, and shows
Current excess air coefficient is smaller, also not up to optimal excess air coefficient, therefore can perform the second operation again, enters one
Step improves the intake of grate firing boiler, until when the fire box temperature of grate firing boiler no longer rises and (keeps stable or decline), table
The current excess air coefficient of bright grate firing boiler optimal excess air coefficient for optimal excess air coefficient or closely, will
The intake of burner hearth maintains intake corresponding with highest fire box temperature.
If performed in first time in the scheduled time after the second operation, the fire box temperature of grate firing boiler declines, and shows
Current excess air coefficient is larger, has exceeded optimal excess air coefficient, therefore performs the first operation, to reduce grate firing boiler
Burner hearth intake, that is, reduce grate firing boiler excess air coefficient.
If within the scheduled time after performing the first operation, the fire box temperature of grate firing boiler rises, then performs again
First operation, with the intake for the burner hearth for further reducing grate firing boiler, until the fire box temperature of grate firing boiler no longer rises.When
When the fire box temperature of grate firing boiler no longer rises and (keeps stable or decline), show the current excess air coefficient of grate firing boiler
For optimal excess air coefficient or closely optimal excess air coefficient, the intake of burner hearth is maintained and highest stove
The corresponding intake of bore temperature.
It should be noted that in the intake for the rear hearth for performing the first operation first, should be less than performing second for the first time
The intake of the front furnace of operation.
, all can be by current fire box temperature and the stove after preceding once execution first operation every time after the operation of execution first
Bore temperature is compared, to determine the change of fire box temperature.If performing first in n-th (n is the integer more than 1) to operate
Afterwards, the fire box temperature of the grate firing boiler difference identical or both with the fire box temperature that (n-1)th time performs after the first operation is permitting
Perhaps in difference range, then current intake is intake corresponding with highest fire box temperature, maintains current intake.
If after n-th (n is the integer more than 1) performs the first operation, the fire box temperature of grate firing boiler performs first less than (n-1)th
Fire box temperature after operation, and both differences beyond the difference range allowed, then (n-1)th execution first is determined after operating
Intake be intake corresponding with highest fire box temperature, by the intake of burner hearth maintain (n-1)th time perform first operate
Identified intake.
Likewise, after performing the second operation every time, all current fire box temperature can be operated with preceding once execution second
Fire box temperature afterwards is compared, to determine the change of fire box temperature.If performing the in n-th (n for integer) more than 1
After two operations, the fire box temperature of grate firing boiler with perform for (n-1)th time second operate after identical or both the difference of fire box temperature
Value is in the difference range of permission, then current intake is intake corresponding with highest fire box temperature, is maintained currently
Intake.If after n-th (n is the integer more than 1) performs the second operation, the fire box temperature of grate firing boiler is less than (n-1)th
Fire box temperature after the operation of execution second, and both differences beyond the difference range allowed, then (n-1)th execution second is operated
Identified intake is intake corresponding with highest fire box temperature afterwards, and the intake of burner hearth is maintained into (n-1)th execution
Intake determined by second operation.
The progress control method of the application grate firing boiler disclosed above, stable situation is kept in the load of grate firing boiler
Under, the second operation is first carried out to improve the intake of burner hearth, if fire box temperature rises, the air intake of burner hearth is further improved
Amount, until fire box temperature no longer rises, intake corresponding with highest fire box temperature is maintained by the intake of burner hearth, if
Scheduled time internal furnace temperature drop after the second operation is performed first, then perform the first operation to reduce the air intake of burner hearth
Amount, if fire box temperature rises, further reduces the intake of burner hearth, until fire box temperature no longer rises, by entering for burner hearth
Air quantity maintains intake corresponding with highest fire box temperature.The application progress control method disclosed above, by burner hearth temperature
Degree is as control foundation, by adjusting the intake of burner hearth, dynamically to find optimal excess air coefficient, so that layer fires
Boiler reaches optimal fired state and heat loss is minimum, improves the thermal efficiency of grate firing boiler, and then reduce grate firing boiler
Coal-fired capacity, reduces smoke discharge amount.
As a kind of embodiment, in the progress control method of the application grate firing boiler disclosed above, perform first and grasp
Make, be specially：Reduce the running frequency of air blower.When reducing the running frequency of air blower, it becomes possible to reduce and enter layer combustion pot
Air in the burner hearth of stove, that is, reduce the intake of burner hearth.
As another embodiment, in the progress control method of the application grate firing boiler disclosed above, first is performed
Operation, be specially：Reduce the running frequency of air-introduced machine.Air-introduced machine can exclude the flue gas in burner hearth, make burner hearth position certain
Negative pressure, when reducing the running frequency of air-introduced machine, can also reduce the air in the burner hearth into grate firing boiler, reduce burner hearth
Intake.
As a preferred embodiment, in the progress control method of the application grate firing boiler disclosed above, performing
First operation, be specially：Reduce the running frequency of air blower and air-introduced machine.
As a kind of embodiment, in the progress control method of the application grate firing boiler disclosed above, perform second and grasp
Make, be specially：Improve the running frequency of air blower.When improving the running frequency of air blower, it becomes possible to which increase enters layer and fires pot
Air in the burner hearth of stove, that is, improve the intake of burner hearth.
As another embodiment, in the progress control method of the application grate firing boiler disclosed above, second is performed
Operation, be specially：Improve the running frequency of air-introduced machine.Air-introduced machine can exclude the flue gas in burner hearth, make burner hearth position certain
Negative pressure, when improving the running frequency of air-introduced machine, can also increase the air in the burner hearth into grate firing boiler, improve burner hearth
Intake.
As a preferred embodiment, in the progress control method of the application grate firing boiler disclosed above, performing
Second operation, be specially：Improve the running frequency of air blower and air-introduced machine.
A kind of control system of grate firing boiler, its structure is also disclosed as shown in fig. 6, including temperature sensor 501 in the application
With controller 502.
Temperature sensor 501 is arranged in the burner hearth of grate firing boiler, the fire box temperature for detecting grate firing boiler.
Controller 502 is connected with temperature sensor 501, is used for：In the case where the load of grate firing boiler keeps stable, hold
Row first is operated, with the intake for the burner hearth for reducing grate firing boiler；If in the given time in the fire box temperature of grate firing boiler
Rise, then perform first again and operate, until the fire box temperature of grate firing boiler no longer rises, by the intake of burner hearth maintain with most
The corresponding intake of high fire box temperature.
It should be noted that the quantity of temperature sensor 501 is one or more.When control system configures multiple temperature
During sensor, the fire box temperature of the average of the temperature value that multiple temperature sensors can be detected as grate firing boiler.
The control system of grate firing boiler disclosed in the present application, using fire box temperature as control foundation, by adjusting burner hearth
Intake, dynamically to find optimal excess air coefficient, so that grate firing boiler reaches optimal fired state and heat
Loss reduction, improves the thermal efficiency of grate firing boiler, and then reduces the Coal-fired capacity of grate firing boiler, reduces smoke discharge amount.
Optionally, controller 502 is additionally operable to：After the first operation is performed, if the stove of grate firing boiler in the given time
Bore temperature declines, then performs second and operate, with the intake for the burner hearth for improving grate firing boiler；If the fire box temperature of grate firing boiler
Rise, then perform second again and operate, until the fire box temperature of grate firing boiler no longer rises, by the intake of burner hearth maintain with
The corresponding intake of highest fire box temperature.
In the case where grate firing boiler is provided with air blower and air-introduced machine, controller 502 is performing the first operating aspect, tool
Body is used for：Reduce the running frequency of at least one in air blower and air-introduced machine.
In the case where grate firing boiler is provided with air blower and air-introduced machine, controller 502 is performing the second operating aspect, tool
Body is used for：Improve the running frequency of at least one in air blower and air-introduced machine.
In addition, controller 502 is additionally operable to：According to the heating load of grate firing boiler and day Coal-fired capacity, the fortune of grate firing boiler is calculated
Line efficiency.
It should be noted that in control system disclosed in the present application, the control process of controller 502 may refer to close above
In the description of the progress control method of grate firing boiler, the control details no longer to controller 502 is repeated here.
Finally, in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of key elements not only include that
A little key elements, but also other key elements including being not expressly set out, or also include be this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except also there is other identical element in the process including the key element, method, article or equipment.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the application.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can in other embodiments be realized in the case where not departing from spirit herein or scope.Therefore, the application
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (8)
1. a kind of progress control method of grate firing boiler, it is characterised in that including：
In the case where the load of the grate firing boiler keeps stable, perform first and operate, to reduce the stove of the grate firing boiler
The intake of thorax；
If the fire box temperature of the grate firing boiler rises in the given time, first operation is performed again, until institute
The fire box temperature for stating grate firing boiler no longer rises, by the intake of the burner hearth maintain it is corresponding with highest fire box temperature enter
Air quantity.
2. progress control method according to claim 1, it is characterised in that after the operation of execution first, in addition to：
If the fire box temperature of the grate firing boiler declines in the given time, perform second and operate, fired with improving the layer
The intake of the burner hearth of boiler；
If the fire box temperature of the grate firing boiler rises in the given time, second operation is performed again, until institute
The fire box temperature for stating grate firing boiler no longer rises, by the intake of the burner hearth maintain it is corresponding with highest fire box temperature enter
Air quantity.
3. progress control method according to claim 2, it is characterised in that the grate firing boiler is configured with air blower and drawn
Blower fan；The execution first is operated, including：
Reduce the running frequency of the air blower；
Or, reduce the running frequency of the air-introduced machine；
Or, reduce the running frequency of the air blower and the air-introduced machine.
4. progress control method according to claim 3, it is characterised in that the execution second is operated, including：
Improve the running frequency of the air blower；
Or, improve the running frequency of the air-introduced machine；
Or, improve the running frequency of the air blower and the air-introduced machine.
5. a kind of control system of grate firing boiler, it is characterised in that including：
For the temperature sensor for the fire box temperature for detecting the grate firing boiler；
The controller being connected with the temperature sensor, the controller is used for：Keep stable in the load of the grate firing boiler
In the case of, perform first and operate, with the intake for the burner hearth for reducing the grate firing boiler；If the layer in the given time
The fire box temperature of combusting boiler rises, then performs first operation again, until the fire box temperature of the grate firing boiler no longer on
Rise, the intake of the burner hearth is maintained into intake corresponding with highest fire box temperature.
6. control system according to claim 5, it is characterised in that the controller is additionally operable to：
After the first operation is performed, if the fire box temperature of the grate firing boiler declines in the given time, perform second and grasp
Make, with the intake for the burner hearth for improving the grate firing boiler；If in the given time in the fire box temperature of the grate firing boiler
Rise, then second operation is performed again, until the fire box temperature of the grate firing boiler no longer rises, by the air intake of the burner hearth
Amount maintains intake corresponding with highest fire box temperature.
7. control system according to claim 6, it is characterised in that the grate firing boiler is configured with air blower and air inducing
Machine；
The controller is performing the first operating aspect, specifically for：Reduce at least one in the air blower and the air-introduced machine
Individual running frequency.
8. control system according to claim 7, it is characterised in that the controller is performing the second operating aspect, tool
Body is used for：Improve the running frequency of at least one in the air blower and the air-introduced machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710606920.1A CN107246606A (en) | 2017-07-24 | 2017-07-24 | The progress control method and control system of grate firing boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710606920.1A CN107246606A (en) | 2017-07-24 | 2017-07-24 | The progress control method and control system of grate firing boiler |
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| CN201710606920.1A Pending CN107246606A (en) | 2017-07-24 | 2017-07-24 | The progress control method and control system of grate firing boiler |
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Citations (4)
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|---|---|---|---|---|
| JPH0735312A (en) * | 1993-07-19 | 1995-02-07 | Kubota Corp | Controlling method for combustion type superheater |
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2017
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| JPH0735312A (en) * | 1993-07-19 | 1995-02-07 | Kubota Corp | Controlling method for combustion type superheater |
| CN203810367U (en) * | 2014-04-30 | 2014-09-03 | 台州市中奥特种设备检测技术服务有限公司 | Automatic excess-air-coefficient adjusting system of industrial coal-fired boiler |
| CN105627295A (en) * | 2014-10-29 | 2016-06-01 | 烟台龙源电力技术股份有限公司 | Chain-grate boiler and burning method |
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