CN107191964B - A kind of method and device of the quick optimal-search control of Thermal generation unit First air - Google Patents
A kind of method and device of the quick optimal-search control of Thermal generation unit First air Download PDFInfo
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- CN107191964B CN107191964B CN201710469937.7A CN201710469937A CN107191964B CN 107191964 B CN107191964 B CN 107191964B CN 201710469937 A CN201710469937 A CN 201710469937A CN 107191964 B CN107191964 B CN 107191964B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/20—Feeding/conveying devices
- F23K2203/201—Feeding/conveying devices using pneumatic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2239/00—Fuels
- F23N2239/02—Solid fuels
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- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The embodiment of the invention discloses a kind of method and devices of quick optimal-search control of Thermal generation unit First air, reduce each coal pulverizer primary air ratio, reduce heat primary air restriction loss, reduce primary air fan power output.A kind of method of quick optimal-search control of Thermal generation unit First air of the embodiment of the present invention includes: S1: carrying out high level selection to the minimum coal-air ratio of raw coal grinding, the minimum coal-air ratio of pulverized coal preheating and manual minimum coal-air ratio, determines that maximum number to coal rate coal pulverizer gives coal rate with corresponding；S2: coal rate is given to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection, it calculates maximum to the grinding of coal rate coal pulverizer, the primary air ratio A of pre- heat demand, determine the primary air ratio B of coal dust conveying, primary air ratio A and primary air ratio B is subjected to high level selection, obtains the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer；S3: adjustment primary air fan power output, until maximum meets minimum primary air ratio demand to the total primary air ratio of coal rate coal pulverizer.
Description
Technical field
The present invention relates to fired power generating unit automation field more particularly to a kind of quick optimizing of Thermal generation unit First air
The method and device of control.
Background technique
Boiler First air has cooperation raw coal grinding, pulverized coal conveying, preheating coal dust, provides coal powder ignition initial stage oxygen amount, shadow
The effects of boiler smoke nitrogen oxide NOx generates is rung, primary air ratio, main air intake aperture and primary wind pressure is rationally controlled, can mention
High boiler safety, energy conservation, reduction performance.
Traditionally, coal pulverizer primary air ratio and primary wind pressure are substantially by boiler factory or boiler heating power test unit according to setting
It counts coal and specific operation demand is calculated and determined.The primary air ratio and primary wind pressure determined by such method, to guarantee boiler
Based on safe operation, but it is difficult to adapt to that unit coal quality is changeable and the needs of boiler operatiopn operating condition variation, it is also difficult to adapt to thermal motor
Group energy conservation, emission reduction need.
Summary of the invention
The embodiment of the invention provides a kind of method and devices of quick optimal-search control of Thermal generation unit First air, reduce
Each coal pulverizer primary air ratio reduces heat primary air restriction loss, reduces primary air fan power output.
A kind of method of quick optimal-search control of Thermal generation unit First air provided in an embodiment of the present invention, comprising:
S1: to the minimum coal-air ratio of raw coal grinding, the minimum coal-air ratio of pulverized coal preheating and scheduled manual minimum coal-air ratio
High level selection is carried out, determines that maximum number to coal rate coal pulverizer gives coal rate with corresponding；
S2: coal rate is given to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection, is calculated maximum to coal
Rate coal pulverizer grinding, pre- heat demand primary air ratio A, determine coal dust conveying primary air ratio B, by the primary air ratio A and institute
It states primary air ratio B and carries out high level selection, obtain the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer；
S3: adjustment primary air fan power output, until maximum meets minimum primary air ratio need to the total primary air ratio of coal rate coal pulverizer
It asks.
Preferably, the step S2 is specifically included:
Coal rate is given to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection, maximum is calculated and is ground to coal rate
Coal machine grinding, pre- heat demand primary air ratio A, determine coal dust conveying primary air ratio B, by the primary air ratio A and described one
Secondary wind rate B carries out high level selection, obtains the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer, determines each coal pulverizer heat
Wind adjusts the minimum aperture that door reaches maximum flow-through rate range, and adjustment maximum reaches maximum flow-through rate to coal rate coal pulverizer hot air disperser
The minimum aperture of range.
Preferably, the step S3 is specifically included:
Maximum to coal rate coal pulverizer primary air ratio and setting value deviation is switched to primary air fan, and to go out force controller entrance inclined
Difference is contributed by the entrance deviation closed-loop control primary air fan, until maximum meet most to the total primary air ratio of coal rate coal pulverizer
Low primary air ratio demand.
Preferably, after the step S3 further include:
Other coal pulverizer hot air disperser apertures are adjusted, until other coal pulverizer primary air ratios meet the First air of corresponding coal pulverizer
Rate requirement.
Preferably, the step S1 is specifically included:
The minimum coal-air ratio of minimum coal-air ratio, pulverized coal preheating that raw coal is ground in reception and scheduled manual minimum wind coal
Than, and the minimum coal-air ratio of raw coal grinding, the minimum coal-air ratio of pulverized coal preheating and scheduled manual minimum coal-air ratio are carried out high
Value selects, the minimum coal-air ratio after exporting selection, determines that maximum number to coal rate coal pulverizer gives coal rate with corresponding.
A kind of device of the quick optimal-search control of Thermal generation unit First air provided in the embodiment of the present invention, comprising:
Determination unit, the minimum coal-air ratio of minimum coal-air ratio, pulverized coal preheating for being ground to raw coal and it is scheduled manually
Minimum coal-air ratio carries out high level selection, determines that maximum number to coal rate coal pulverizer gives coal rate with corresponding；
Acquiring unit, for giving coal rate, meter to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection
Maximum is calculated to the grinding of coal rate coal pulverizer, the primary air ratio A of pre- heat demand, determines the primary air ratio B of coal dust conveying, it will be described primary
The wind rate A and primary air ratio B carries out high level selection, obtains the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer；
The first adjustment unit, for adjusting primary air fan power output, until maximum meet to the total primary air ratio of coal rate coal pulverizer
Minimum primary air ratio demand.
Preferably, the acquiring unit specifically includes:
Computation subunit, specifically for giving coal to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection
Rate calculates maximum to the grinding of coal rate coal pulverizer, the primary air ratio A of pre- heat demand；
First determines subelement, specifically for determining the primary air ratio B of coal dust conveying；
First high level selects subelement, is specifically used for the primary air ratio A and primary air ratio B carrying out high level choosing
It selects；
First obtains subelement, specifically for obtaining the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer；
Second determines subelement, adjusts the minimum that door reaches maximum flow-through rate range specifically for each coal pulverizer hot wind of determination
Aperture；
Subelement is adjusted, specifically for the maximum minimum for reaching maximum flow-through rate range to coal rate coal pulverizer hot air disperser of adjustment
Aperture.
Preferably, the first adjustment unit specifically includes:
Switching subelement, specifically for maximum is switched to First air to coal rate coal pulverizer primary air ratio and setting value deviation
Machine goes out force controller entrance deviation；
Subelement is controlled, is specifically used for contributing by the entrance deviation closed-loop control primary air fan, until maximum give coal
The total primary air ratio of rate coal pulverizer meets minimum primary air ratio demand.
Preferably, further includes:
Second adjustment unit, for adjusting other coal pulverizer hot air disperser apertures, until other coal pulverizer primary air ratios meet
The primary air ratio requirement of corresponding coal pulverizer.
Preferably, the determination unit specifically includes:
Receiving subelement, specifically for receive the minimum coal-air ratio that raw coal is ground, pulverized coal preheating minimum coal-air ratio and
Scheduled manual minimum coal-air ratio；
Second high level selects subelement, specifically for the minimum wind coal of the minimum coal-air ratio, pulverized coal preheating that grind to raw coal
Than carrying out high level selection with scheduled manual minimum coal-air ratio；
Subelement is exported, specifically for the minimum coal-air ratio after output selection；
Third determines subelement, is specifically used for determining that maximum number to coal rate coal pulverizer gives coal rate with corresponding.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
A kind of method and device of the quick optimal-search control of Thermal generation unit First air provided in the embodiment of the present invention,
In, a kind of method of the quick optimal-search control of Thermal generation unit First air includes: S1: minimum coal-air ratio, coal to raw coal grinding
The minimum coal-air ratio of powder preheating and scheduled manual minimum coal-air ratio carry out high level selection, determine that maximum is numbered to coal rate coal pulverizer
Coal rate is given with corresponding；S2: coal rate is given to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection, is calculated most
Greatly to the grinding of coal rate coal pulverizer, the primary air ratio A of pre- heat demand, the primary air ratio B of coal dust conveying is determined, by the primary air ratio
The A and primary air ratio B carries out high level selection, obtains the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer；S3: it adjusts
Whole primary air fan power output, until maximum meets minimum primary air ratio demand to the total primary air ratio of coal rate coal pulverizer.In the present embodiment,
High level selection is carried out by the minimum coal-air ratio and manual minimum coal-air ratio of the minimum coal-air ratio, pulverized coal preheating that grind to raw coal,
Determine that maximum number to coal rate coal pulverizer gives coal rate with corresponding；Coal rate coal-grinding is given with maximum by the minimum coal-air ratio after selection
Machine is corresponding to give coal rate, calculates maximum to the grinding of coal rate coal pulverizer, the primary air ratio A of pre- heat demand, determines the one of coal dust conveying
Primary air ratio A and primary air ratio B is carried out high level selection by secondary wind rate B, obtains the maximum minimum needed to the operation of coal rate coal pulverizer
Primary air ratio；Primary air fan power output is adjusted, until maximum meets minimum primary air ratio demand to the total primary air ratio of coal rate coal pulverizer,
Each coal pulverizer primary air ratio is reduced, heat primary air restriction loss is reduced, reduces primary air fan power output, accelerates unit load and rings
It answers.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
One of the method for a kind of quick optimal-search control of Thermal generation unit First air provided in Fig. 1 embodiment of the present invention
The flow diagram of embodiment；
A kind of method of the quick optimal-search control of Thermal generation unit First air provided in Fig. 2 embodiment of the present invention it is another
The flow diagram of a embodiment；
One of the device of a kind of quick optimal-search control of Thermal generation unit First air provided in Fig. 3 embodiment of the present invention
The structural schematic diagram of embodiment；
A kind of device of the quick optimal-search control of Thermal generation unit First air provided in Fig. 4 embodiment of the present invention it is another
The structural schematic diagram of a embodiment；
A kind of method of the quick optimal-search control of Thermal generation unit First air provided in Fig. 5 embodiment of the present invention it is another
The flow diagram of a embodiment；
The primary air fan power output control principle drawing provided in Fig. 6 embodiment of the present invention；
A kind of coal pulverizer hot air disperser control principle drawing provided in Fig. 7 embodiment of the present invention.
Specific embodiment
The embodiment of the invention provides a kind of method and devices of quick optimal-search control of Thermal generation unit First air, reduce
Each coal pulverizer primary air ratio reduces heat primary air restriction loss, reduces primary air fan power output.
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
Referring to Fig. 1, a kind of side of the quick optimal-search control of Thermal generation unit First air provided in the embodiment of the present invention
One embodiment of method includes:
101, to the minimum coal-air ratio of raw coal grinding, the minimum coal-air ratio of pulverized coal preheating and scheduled manual minimum coal-air ratio
High level selection is carried out, determines that maximum number to coal rate coal pulverizer gives coal rate with corresponding；
By field testing procedure, the minimum coal-air ratio of raw coal grinding, the minimum coal-air ratio of pulverized coal preheating are determined respectively.It is former
The minimum coal-air ratio of coal grinding few, mill according to the pebble coal raw coal ingredient that includes that coal pulverizer in unit raw coal process of lapping is discharged
Coal machine dross coal total emission volumn is less, coal pulverizer outlet coal particle size meets minimum air quantity needed for technique and determines.Pulverized coal preheating
Minimum coal-air ratio reach predetermined according to the wind that exports in coal pulverizer of unit mass coal dust after grinding, powder mixture temperature
Pulverizer outlet temperature needed for minimum primary air ratio determine.Wherein First air refers in firepower electrical plant for carrying coal dust
Into the air distribution of boiler, it is divided into heat primary air and cold First air.Heat primary air is certain for guaranteeing to have when coal dust enters boiler
Temperature, ratio are big；For cold First air for adjusting coal pulverizer outlet mixture temperature, ratio is small.Such as meeting coal dust conveying minimum
There is pulverizer outlet temperature more than scheduled pulverizer outlet temperature under conditions of the minimum coal-air ratio that coal-air ratio, raw coal are ground
When, it can be suitably adjusted by increasing the method for cold primary air ratio.Minimum coal-air ratio, the coal of the raw coal grinding determining to test
The minimum coal-air ratio of powder preheating carries out big value selection, determines the minimum coal-air ratio of grinding, preheating requirement.In order to meet various coals
It grinds, preheat, conveying and the needs of various special operation conditions, system also set up the manual wind coal manually adjusted for operations staff
Than the minimum coal-air ratio of manual coal-air ratio and technique requirement carries out big value and selects, the coal-air ratio after exporting selection.Compare and determines most
It is numbered to coal rate coal pulverizer greatly and correspondence gives coal rate.
102, coal rate is given to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection, calculated maximum to coal
Rate coal pulverizer grinding, pre- heat demand primary air ratio A, determine coal dust conveying primary air ratio B, by the primary air ratio A and institute
It states primary air ratio B and carries out high level selection, obtain the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer；
According to after selection coal-air ratio and it is maximum give coal rate to coal rate coal pulverizer is corresponding, calculate maximum and give coal rate coal pulverizer
It grinds, the primary air ratio A of pre- heat demand.By field testing procedure, the primary air ratio B of coal dust conveying is determined.Coal dust conveying
Primary air ratio is calculated by coal pulverizer outlet primary air piping inner section area, First air density and First air powder feeding allows minimum wind speed
And coal pulverizer maximum is obtained to coal rate COMPREHENSIVE CALCULATING.First air powder feeding allows minimum wind speed to determine by field test, it is desirable that
Coal dust conveying is stablized in coal dust transmission process between coal pulverizer-boiler-burner, and coal pulverizer, primary air piping do not deposit
Required minimum First air wind speed.Primary air ratio A and primary air ratio B carries out high level selection, obtains maximum and transports to coal rate coal pulverizer
The minimum primary air ratio that row needs.
103, adjustment primary air fan power output, until maximum meets minimum primary air ratio need to the total primary air ratio of coal rate coal pulverizer
It asks.
Primary air fan power output is adjusted, maximum is made to meet minimum primary air ratio demand to the total primary air ratio of coal rate coal pulverizer.This
Step further include: a) by field test, determine that heat primary air door is most when every coal pulverizer hot air disperser reaches maximum ventilation rate
Small guide vane.B) by handoff functionality, maximum is switched to the corresponding minimum aperture of maximum ventilation rate to coal rate coal pulverizer hot air disperser.c)
By handoff functionality, maximum to coal rate coal pulverizer primary air ratio and setting value deviation be switched to primary air fan go out force controller
Mouth deviation, is contributed by the entrance deviation closed-loop control primary air fan, to make maximum full to the total primary air ratio of coal rate coal pulverizer
The minimum primary air ratio demand of foot.Other coal pulverizer hot air disperser apertures are adjusted, other coal pulverizer primary air ratios is made to meet corresponding coal-grinding
The primary air ratio requirement of machine.
In the present embodiment, best First air air quantity needed for each coal pulverizer according to primary air piping geometric dimension, current coal, when
Preceding to calculate determination in real time to coal rate, the control of coal pulverizer primary air ratio is more reasonable.By the way that maximum is primary to coal rate coal pulverizer heat
Air door switches to maximum through-flow aperture, then gives coal rate coal pulverizer total First air by primary air fan power output closed-loop control maximum
Rate realizes primary air fan power output control.Other coal pulverizers according to current primary wind pressure, will corresponding coal pulverizer primary air ratio control to
Corresponding primary air ratio requirements.This control mode can quickly change primary air fan power output in load increase and decrease, accelerate coal-fired
Conveying and Combustion Operation of Boilers change procedure, to accelerate unit load response process.Control mode through this embodiment, one
Secondary blower power output changes fast and ensure that maximum output coal pulverizer hot wind is in minimum throttle, has been better achieved primary
The Energy Saving Control of system.
The above is that a kind of method of quick optimal-search control of Thermal generation unit First air is described in detail, and below will
The process of a kind of method of quick optimal-search control of Thermal generation unit First air is described in detail, referring to Fig. 2, this hair
A kind of another embodiment of the method for the quick optimal-search control of Thermal generation unit First air provided in bright embodiment includes:
201, the minimum coal-air ratio of raw coal is ground in reception minimum coal-air ratio, pulverized coal preheating and scheduled manual minimum wind
Coal ratio, and the minimum coal-air ratio of raw coal grinding, the minimum coal-air ratio of pulverized coal preheating and scheduled manual minimum coal-air ratio are carried out
High level selection, the minimum coal-air ratio after exporting selection determine that maximum gives coal rate with corresponding to coal rate coal pulverizer number；
The subcritical Thermal generation unit of certain 600MW, boiler model HG-2008/17.4-YM5 are equipped with 6 sets of positive pressure blow-throughs
Formula pulverized coal preparation system, coal pulverizer model MBF24.0, primary air fan model 1788AZ/1302 type.Every coal pulverizer outlet is equipped with
4 round primary air pipings, interior caliber 0.688m.One application examples of the quick control method for improving of boiler First air: at certain
The subcritical Thermal generation unit of 600MW implements the primary air fan method of quick optimal-search control comprising step: passes through field test
Method respectively obtains powder feeding First air coal-air ratio, grinding First air coal-air ratio, pre- heat primary air coal-air ratio parameter.In order to make to control
System processed better adapts to the needs of coal varitation and changes in environmental conditions, is also provided with manual coal-air ratio signal, the coal-air ratio
Powder feeding First air coal-air ratio that signal and afore-mentioned test obtain, grinding First air coal-air ratio, pre- heat primary air coal-air ratio carry out high
Value selection.High level select after First air coal-air ratio signal as final coal-air ratio signal.Compare and determines that maximum is ground to coal rate
Coal machine number and correspondence give coal rate.
202, coal rate is given to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection, calculated maximum to coal
Rate coal pulverizer grinding, pre- heat demand primary air ratio A, determine coal dust conveying primary air ratio B, by the primary air ratio A and institute
It states primary air ratio B and carries out high level selection, obtain the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer, determine each coal-grinding
Machine hot wind adjusts the minimum aperture that door reaches maximum flow-through rate range, and adjustment is maximum to reach maximum logical to coal rate coal pulverizer hot air disperser
The minimum aperture of flow rate range；
Such as Fig. 5-Fig. 7, according to after selection coal-air ratio and it is maximum give coal rate to coal rate coal pulverizer is corresponding, calculate maximum and give
Coal rate coal pulverizer grinding, pre- heat demand primary air ratio A.By field testing procedure, the primary air ratio B of coal dust conveying is determined.
The primary air ratio of coal dust conveying is permitted by coal pulverizer outlet primary air piping inner section area, the calculating of First air density and First air powder feeding
Perhaps minimum wind speed and coal pulverizer maximum are obtained to coal rate COMPREHENSIVE CALCULATING.First air powder feeding allows minimum wind speed true by field test
It is fixed, it is desirable that coal dust conveying is stablized in the coal dust transmission process between coal pulverizer-boiler-burner, and coal pulverizer, primary air piping are not
Minimum First air wind speed needed for there is deposition.Primary air ratio A and primary air ratio B carries out high level selection, obtains maximum and gives coal rate
The minimum primary air ratio that coal pulverizer operation needs.By field test, determine that every coal pulverizer hot air disperser reaches maximum ventilation rate
When heat primary air door minimum aperture.By handoff functionality, when maximum is switched to maximum ventilation rate to coal rate coal pulverizer hot air disperser
Corresponding minimum aperture (referring to Fig. 7).
203, maximum be switched to primary air fan to coal rate coal pulverizer primary air ratio and setting value deviation go out force controller
Mouth deviation, is contributed by the entrance deviation closed-loop control primary air fan, until maximum full to the total primary air ratio of coal rate coal pulverizer
The minimum primary air ratio demand of foot；
By handoff functionality, maximum is switched to primary air fan power output to coal rate coal pulverizer primary air ratio and setting value deviation
Controller entrance deviation makes maximum pass through primary air fan power output closed loop to coal rate coal pulverizer inlet wind rate and adjusts.
204, other coal pulverizer hot air disperser apertures are adjusted, until other coal pulverizer primary air ratios meet the one of corresponding coal pulverizer
Secondary wind rate requirement.
Other coal pulverizer inlet primary air ratios are adjusted by corresponding coal pulverizer hot air disperser closed loop, make other coal pulverizer inlet wind
Rate tracks corresponding setting value.
In the present embodiment, by the way that maximum is switched to scheduled heat primary air maximum flow-through rate to coal rate coal pulverizer hot air disperser
Aperture is contributed closed loop satisfaction maximum to the quick optimizing of First air of coal rate coal pulverizer primary air ratio by primary air fan, is being met
Coal dust conveying, pulverized coal grinding and coal dust enter before burner hearth reach predetermined temperature under the premise of, reduce each coal pulverizer primary air ratio,
It reduces heat primary air restriction loss, reduce primary air fan power output.
Referring to Fig. 3, a kind of dress of the quick optimal-search control of Thermal generation unit First air provided in the embodiment of the present invention
The one embodiment set includes:
Determination unit 301, the minimum coal-air ratio and scheduled hand of minimum coal-air ratio, pulverized coal preheating for being ground to raw coal
Dynamic minimum coal-air ratio carries out high level selection, determines that maximum gives coal rate with corresponding to coal rate coal pulverizer number；
Acquiring unit 302, for giving coal rate to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection,
Maximum is calculated to the grinding of coal rate coal pulverizer, the primary air ratio A of pre- heat demand, the primary air ratio B of coal dust conveying is determined, by described one
The secondary wind rate A and primary air ratio B carries out high level selection, obtains the maximum minimum First air needed to the operation of coal rate coal pulverizer
Rate；
The first adjustment unit 303, for adjusting primary air fan power output, until maximum full to the total primary air ratio of coal rate coal pulverizer
The minimum primary air ratio demand of foot.
The above is the detailed description carried out to a kind of device of quick optimal-search control of Thermal generation unit First air, below
A kind of device of quick optimal-search control of Thermal generation unit First air will be described in detail, referring to Fig. 4, the present invention is real
Another embodiment for applying a kind of device of the quick optimal-search control of Thermal generation unit First air provided in example includes:
Determination unit 401, the minimum coal-air ratio and scheduled hand of minimum coal-air ratio, pulverized coal preheating for being ground to raw coal
Dynamic minimum coal-air ratio carries out high level selection, determines that maximum gives coal rate with corresponding to coal rate coal pulverizer number；
The determination unit 401 specifically includes:
Receiving subelement 4011, the minimum wind coal of raw coal is ground specifically for reception minimum coal-air ratio, pulverized coal preheating
Than with scheduled manual minimum coal-air ratio；
Second high level selects subelement 4012, specifically for the minimum of the minimum coal-air ratio, pulverized coal preheating that grind to raw coal
Coal-air ratio and scheduled manual minimum coal-air ratio carry out high level selection；
Subelement 4013 is exported, specifically for the minimum coal-air ratio after output selection；
Third determines subelement 4014, is specifically used for determining that maximum number to coal rate coal pulverizer gives coal rate with corresponding.
Acquiring unit 402, for giving coal rate to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection,
Maximum is calculated to the grinding of coal rate coal pulverizer, the primary air ratio A of pre- heat demand, the primary air ratio B of coal dust conveying is determined, by described one
The secondary wind rate A and primary air ratio B carries out high level selection, obtains the maximum minimum First air needed to the operation of coal rate coal pulverizer
Rate；
The acquiring unit 402 specifically includes:
Computation subunit 4021, it is corresponding to coal rate coal pulverizer specifically for passing through the minimum coal-air ratio after selecting and maximum
Coal rate is given, is calculated maximum to the grinding of coal rate coal pulverizer, the primary air ratio A of pre- heat demand；
First determines subelement 4022, specifically for determining the primary air ratio B of coal dust conveying；
First high level selects subelement 4023, is specifically used for the primary air ratio A and primary air ratio B carrying out high level
Selection；
First obtains subelement 4024, specifically for obtaining the maximum minimum First air needed to the operation of coal rate coal pulverizer
Rate；
Second determines subelement 4025, adjusts door specifically for each coal pulverizer hot wind of determination and reaches maximum flow-through rate range
Minimum aperture；
Subelement 4026 is adjusted, reaches maximum flow-through rate range to coal rate coal pulverizer hot air disperser specifically for adjustment maximum
Minimum aperture.
The first adjustment unit 403, for adjusting primary air fan power output, until maximum full to the total primary air ratio of coal rate coal pulverizer
The minimum primary air ratio demand of foot.
The first adjustment unit 403 specifically includes:
Switching subelement 4031, specifically for maximum is switched to one to coal rate coal pulverizer primary air ratio and setting value deviation
Secondary blower goes out force controller entrance deviation；
Subelement 4032 is controlled, is specifically used for contributing by the entrance deviation closed-loop control primary air fan, until maximum
Meet minimum primary air ratio demand to the total primary air ratio of coal rate coal pulverizer.
Second adjustment unit 404, for adjusting other coal pulverizer hot air disperser apertures, until other coal pulverizer primary air ratios are full
The primary air ratio requirement of the corresponding coal pulverizer of foot.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of method of the quick optimal-search control of Thermal generation unit First air characterized by comprising
S1: the minimum coal-air ratio of raw coal grinding, the minimum coal-air ratio of pulverized coal preheating and scheduled manual minimum coal-air ratio are carried out
High level selection determines that maximum number to coal rate coal pulverizer gives coal rate with corresponding；
S2: coal rate is given to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection, maximum is calculated and is ground to coal rate
Coal machine grinding, pre- heat demand primary air ratio A, determine coal dust conveying primary air ratio B, by the primary air ratio A and described one
Secondary wind rate B carries out high level selection, obtains the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer；
S3: adjustment primary air fan power output, until maximum meets minimum primary air ratio demand to the total primary air ratio of coal rate coal pulverizer.
2. the method for the quick optimal-search control of Thermal generation unit First air according to claim 1, which is characterized in that described
Step S2 is specifically included:
Coal rate is given to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection, maximum is calculated and gives coal rate coal pulverizer
It grinds, the primary air ratio A of pre- heat demand, the primary air ratio B of coal dust conveying is determined, by the primary air ratio A and the First air
Rate B carries out high level selection, obtains the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer, determines each coal pulverizer hot wind tune
Section door reaches the minimum aperture of maximum flow-through rate range, and adjustment is maximum to reach maximum flow-through rate to coal rate coal pulverizer hot wind adjusting door
The minimum aperture of range.
3. the method for the quick optimal-search control of Thermal generation unit First air according to claim 2, which is characterized in that described
Step S3 is specifically included:
Maximum is switched to primary air fan to coal rate coal pulverizer primary air ratio and setting value deviation and goes out force controller entrance deviation, is led to
Cross entrance deviation closed-loop control primary air fan power output, until it is maximum meet to the total primary air ratio of coal rate coal pulverizer it is minimum primary
Wind rate demand.
4. the method for the quick optimal-search control of Thermal generation unit First air according to claim 3, which is characterized in that described
After step S3 further include:
It adjusts other coal pulverizer hot winds and adjusts door aperture, until other coal pulverizer primary air ratios meet the First air of corresponding coal pulverizer
Rate requirement.
5. the method for the quick optimal-search control of Thermal generation unit First air according to claim 4, which is characterized in that described
Step S1 is specifically included:
The minimum coal-air ratio of minimum coal-air ratio, pulverized coal preheating that raw coal is ground in reception and scheduled manual minimum coal-air ratio, and
High level choosing is carried out to the minimum coal-air ratio of raw coal grinding, the minimum coal-air ratio of pulverized coal preheating and scheduled manual minimum coal-air ratio
It selects, the minimum coal-air ratio after exporting selection, determines that maximum number to coal rate coal pulverizer gives coal rate with corresponding.
6. a kind of device of the quick optimal-search control of Thermal generation unit First air characterized by comprising
Determination unit, the minimum coal-air ratio of minimum coal-air ratio, pulverized coal preheating for being ground to raw coal and scheduled manual minimum
Coal-air ratio carries out high level selection, determines that maximum number to coal rate coal pulverizer gives coal rate with corresponding；
Acquiring unit calculates most for giving coal rate to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection
Greatly to the grinding of coal rate coal pulverizer, the primary air ratio A of pre- heat demand, the primary air ratio B of coal dust conveying is determined, by the primary air ratio
The A and primary air ratio B carries out high level selection, obtains the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer；
The first adjustment unit, for adjusting primary air fan power output, until it is maximum meet to the total primary air ratio of coal rate coal pulverizer it is minimum
Primary air ratio demand.
7. the device of the quick optimal-search control of Thermal generation unit First air according to claim 6, which is characterized in that described
Acquiring unit specifically includes:
Computation subunit, specifically for giving coal rate to coal rate coal pulverizer is corresponding with maximum by the minimum coal-air ratio after selection,
It calculates maximum to the grinding of coal rate coal pulverizer, the primary air ratio A of pre- heat demand；
First determines subelement, specifically for determining the primary air ratio B of coal dust conveying；
First high level selects subelement, is specifically used for the primary air ratio A and primary air ratio B carrying out high level selection；
First obtains subelement, specifically for obtaining the maximum minimum primary air ratio needed to the operation of coal rate coal pulverizer；
Second determines subelement, and the minimum for reaching maximum flow-through rate range specifically for each coal pulverizer hot wind adjusting door of determination is opened
Degree；
Subelement is adjusted, adjusts the minimum that door reaches maximum flow-through rate range to coal rate coal pulverizer hot wind specifically for adjustment is maximum
Aperture.
8. the device of the quick optimal-search control of Thermal generation unit First air according to claim 7, which is characterized in that described
The first adjustment unit specifically includes:
Switching subelement goes out specifically for maximum is switched to primary air fan to coal rate coal pulverizer primary air ratio and setting value deviation
Force controller entrance deviation；
Subelement is controlled, is specifically used for contributing by the entrance deviation closed-loop control primary air fan, until maximum grind to coal rate
The total primary air ratio of coal machine meets minimum primary air ratio demand.
9. the device of the quick optimal-search control of Thermal generation unit First air according to claim 8, which is characterized in that also wrap
It includes:
Second adjustment unit adjusts door aperture for adjusting other coal pulverizer hot winds, until other coal pulverizer primary air ratios meet
The primary air ratio requirement of corresponding coal pulverizer.
10. the device of the quick optimal-search control of Thermal generation unit First air according to claim 9, which is characterized in that institute
Determination unit is stated to specifically include:
Receiving subelement, specifically for receiving the minimum coal-air ratio of minimum coal-air ratio grind to raw coal, pulverized coal preheating and making a reservation for
Manual minimum coal-air ratio；
Second high level selects subelement, the minimum coal-air ratio of minimum coal-air ratio, pulverized coal preheating specifically for being ground to raw coal and
Scheduled manual minimum coal-air ratio carries out high level selection；
Subelement is exported, specifically for the minimum coal-air ratio after output selection；
Third determines subelement, is specifically used for determining that maximum number to coal rate coal pulverizer gives coal rate with corresponding.
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| CN109894251B (en) * | 2019-03-28 | 2020-06-02 | 广东电科院能源技术有限责任公司 | Control method, device and equipment for primary air of coal-fired unit |
| CN114178036B (en) * | 2021-10-15 | 2023-05-23 | 广东红海湾发电有限公司 | Primary air quantity and primary air pressure control method for inlet of coal mill |
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| CN101078525A (en) * | 2007-06-25 | 2007-11-28 | 周振华 | Automatic optimization control method of boiler air-supply volume |
| US20100083883A1 (en) * | 2008-10-06 | 2010-04-08 | Neil Hofer | Solid Fuel Boiler Assembly |
| CN103836639B (en) * | 2013-12-31 | 2016-02-24 | 广东电网公司电力科学研究院 | A kind of primary air fan control method based on First air burner hearth differential pressure and device |
| CN104456614B (en) * | 2014-11-04 | 2017-02-15 | 大唐韩城第二发电有限责任公司 | Primary air pressure automatic optimization system and method of primary air fan of power plant boiler |
| JP2017075758A (en) * | 2015-10-16 | 2017-04-20 | 中国電力株式会社 | Primary air flow rate control system |
| CN105605608A (en) * | 2016-02-02 | 2016-05-25 | 华北电力科学研究院有限责任公司 | Method and device for determining inlet air quantities and automatic control system |
| CN106352370B (en) * | 2016-08-25 | 2018-11-06 | 邢红涛 | The air distribution control method and device of pulverized-coal fired boiler |
| CN106705117B (en) * | 2017-01-22 | 2023-07-11 | 华北电力科学研究院有限责任公司 | Primary air system of thermal power plant and start-stop control method thereof |
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