CN105205030B - The method and system of primary air measuring - Google Patents
The method and system of primary air measuring Download PDFInfo
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- CN105205030B CN105205030B CN201510618536.4A CN201510618536A CN105205030B CN 105205030 B CN105205030 B CN 105205030B CN 201510618536 A CN201510618536 A CN 201510618536A CN 105205030 B CN105205030 B CN 105205030B
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Abstract
The invention discloses a kind of method and system of primary air measuring, including：Obtain the main air intake opening value of coal pulverizer in generating set, material position value and mixing wind pressure value；Air quantity proportion function is corresponded to according to the main air intake opening value and valve opening, obtains primary air flow initial value；According to the material position value and material position factor function, material position factor to affect of the material position value to primary air flow is obtained；According to the mixing wind pressure value and blast factor function, influenced by wind pressure factor of the mixing wind pressure value to primary air flow is obtained；Using the primary air flow initial value, the material position factor to affect and the influenced by wind pressure factor, First air value is obtained；This method and system accurately can measure and calculate First air value, reach and unit allocation is become more meticulous.
Description
Technical field
The present invention relates to technical field of electricity, more particularly to a kind of method and system of primary air measuring.
Background technology
Primary air measuring is an important measuring system in coal-burning power plant, and its accuracy is directly connected to boiler vapour
The stability of the parameters such as temperature, load, feedwater.
During unit operation, the coal in boiler is sent into burner hearth by First air, and the coal for being sent into burner hearth is to pass through primary air flow
Equivalent calculate and go out, the feeding of coal is how much, directly influences the stability of boiler combustion, feedwater number, the fluctuation of steam temperature, mesh
The preceding country is using direct measurement primary air flow come the calculating to coal amount.
But reality operation in, due to being changed by unit ature of coal, coal amount number and material position height, system
The influence of the factors such as the fineness of coal of powder system coal pulverizer production, other equipment, the primary air flow directly surveyed tend not to represent
The coal amount of burner hearth is directly entered, under the big coordination control of unit, because the coal amount distortion of primary air measuring reaction causes temperature
Unstable, load fluctuation it is big.
Therefore, how accurately primary air flow to be measured, is those skilled in the art's technical issues that need to address.
The content of the invention
It is an object of the invention to provide a kind of method of primary air measuring, this method is accurately measured and calculated once
Airflow value, reach and unit allocation is become more meticulous, improve the Stability and dependability of machine set system；In addition, the present invention's is another
Purpose is to provide a kind of system of primary air measuring.
In order to solve the above technical problems, the present invention provides a kind of method of primary air measuring, including：
Obtain the main air intake opening value of coal pulverizer in generating set, material position value and mixing wind pressure value；
Air quantity proportion function is corresponded to according to the main air intake opening value and valve opening, obtains primary air flow initial value；
According to the material position value and material position factor function, material position factor to affect of the material position value to primary air flow is obtained；
According to the mixing wind pressure value and blast factor function, blast shadow of the mixing wind pressure value to primary air flow is obtained
Ring factor；
Using the primary air flow initial value, the material position factor to affect and the influenced by wind pressure factor, First air is obtained
Value.
Preferably, in addition to：
According to the main air intake opening value, the material position value and the mixing wind pressure value, using predetermined bias function, obtain
To bias；
The First air value is modified using the bias, using correction result as First air value.
Preferably, it is described according to the main air intake opening value, the material position value and the mixing wind pressure value, using predetermined
Bias function, obtaining bias includes：
According to the main air intake opening value and valve opening bias function, aperture bias is obtained；
According to the material position value and material position bias function, material position bias is obtained；
According to the mixing wind pressure value and blast bias function, blast bias is obtained；
By the aperture bias, the material position bias and the blast bias are weighted summation, are biased
Value.
Preferably, it is described obtain generating set in coal pulverizer main air intake opening value, material position value and mixing wind pressure value it
After include：
The material position value is delayed by the first predetermined delay function；And/or
The mixing wind pressure value is delayed by the second predetermined delay function.
Preferably, in addition to：
By pre-defined algorithm, air quantity proportion function, the material position factor function, the blast are corresponded to the valve opening
Factor function and the predetermined bias function are modified.
The present invention provides a kind of system of primary air measuring, including：
Sampler samples device, for obtaining the main air intake opening value of coal pulverizer in generating set, material position value and mixing wind
Pressure value；
Calculation of initial value device, for corresponding to air quantity proportion function according to the main air intake opening value and valve opening, obtain
To primary air flow initial value；
Material position factor calculator, for according to the material position value and material position factor function, obtaining the material position value to once
The material position factor to affect of air quantity；
Blast factor calculator, for according to the mixing wind pressure value and blast factor function, obtaining the mixing blast
It is worth the influenced by wind pressure factor to primary air flow；
Wind Coverage Calculation device, for utilizing the primary air flow initial value, the material position factor to affect and the influenced by wind pressure
Factor, obtain First air value.
Preferably, in addition to：
Offset calculator, for according to the main air intake opening value, the material position value and the mixing wind pressure value, utilizing
Predetermined bias function, obtains bias；
Corrected Calculation device, for being modified using the bias to the First air value, using correction result as
First air value.
Preferably, the offset calculator includes：
Aperture offset calculator, for according to the main air intake opening value and valve opening bias function, obtaining aperture
Bias；
Material position offset calculator, for according to the material position value and material position bias function, obtaining material position bias；
Blast offset calculator, for according to the mixing wind pressure value and blast bias function, obtaining blast bias；
Total offset calculator, for the aperture bias, the material position bias and the blast bias to be carried out
Weighted sum, obtain bias.
Preferably, in addition to：
Material position delayer, for the material position value to be delayed by the first predetermined delay function；And/or blast delayer,
The mixing wind pressure value is delayed by the second predetermined delay function.
Preferably, in addition to：
Function updates calculator, for by pre-defined algorithm, air quantity proportion function, the material to be corresponded to the valve opening
Position factor function, the blast factor function and the predetermined bias function are modified.
The method and system of primary air measuring provided by the present invention, including：Obtain one of coal pulverizer in generating set
Secondary throttle opening value, material position value and mixing wind pressure value；Air quantity ratio is corresponded to according to the main air intake opening value and valve opening
Function, obtain primary air flow initial value；According to the material position value and material position factor function, the material position value is obtained to primary air flow
Material position factor to affect；According to the mixing wind pressure value and blast factor function, the mixing wind pressure value is obtained to primary air flow
Influenced by wind pressure factor；Using the primary air flow initial value, the material position factor to affect and the influenced by wind pressure factor, obtain
First air value；
This method and system are all carried out by will influence the main air intake aperture of primary air measuring, material position and mixing blast
Measurement, and they are converted into accurate primary air flow, i.e., by their changing value by the factor to affect that is calculated come pair
Initial air quantity is modified；Influence of the main air intake opening value to primary air flow is not exclusively only considered, therefore, it is possible to accurate
First air value is measured and calculated, reaches and unit allocation is become more meticulous.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, 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.
The flow chart of the method for the primary air measuring that Fig. 1 is provided by the embodiment of the present invention；
The structured flowchart of the system for the primary air measuring that Fig. 2 is provided by the embodiment of the present invention.
Embodiment
The core of the present invention is to provide a kind of method of primary air measuring, and this method is accurately measured and calculated once
Airflow value, reach and unit allocation is become more meticulous, improve the Stability and dependability of machine set system；In addition, the present invention's is another
Core is to provide a kind of system of primary air measuring.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
It refer to the flow chart of the method for the primary air measuring that Fig. 1 Fig. 1 is provided by the embodiment of the present invention；This method can
With including：
Step s100, the main air intake opening value of coal pulverizer in generating set, material position value and mixing wind pressure value are obtained；
Wherein, the mixing of the material position sampler for measuring generating set coal pulverizer in generating set, measurement coal pulverizer is passed through
Blast sampler, measure coal pulverizer main air intake aperture sampler come calculate material position value, mixing wind pressure value, main air intake aperture
Value；
Wherein, mixing blast sampler includes mixing wind force samples device；Material position sampler includes giving differential pressure type material position system
System；Main air intake aperture sampler main air intake feedback sample device.
Step s110, air quantity proportion function is corresponded to according to the main air intake opening value and valve opening, obtains First air
Measure initial value；
Wherein, valve opening corresponds to the judgement for the n item factor of judgment that air quantity proportion function can input by obtaining user
Parameter, wherein n >=2；The input X of function span is mill load throttle opening scope, according to load wind in actual production
Door open range setting；The output valve of function is adjusted optimization according to practical operation situation to itself and X respective values, i.e., by using
The X of family input corresponds to the corresponding primary air flow initial value that air quantity proportion function is calculated by valve opening.
Step s120, according to the material position value and material position factor function, material position of the material position value to primary air flow is obtained
Factor to affect；
Wherein, the judgement parameter for the n item factor of judgment that material position factor function can be inputted by obtaining user, wherein n >=
2；The input X of function span is material bit value ranges, according to material position range set in actual production；The output valve root of function
Optimization is adjusted to itself and X respective values according to practical operation situation, i.e., the X inputted by user is calculated by material position factor function
Obtained corresponding material position value.
Step s130, according to the mixing wind pressure value and blast factor function, the mixing wind pressure value is obtained to First air
The influenced by wind pressure factor of amount；
Wherein, the judgement parameter for the n item factor of judgment that blast factor function can be inputted by obtaining user, wherein n >=
2；The input X of function span is mixing wind pressure value scope, according to mixing blast range set in actual production；Function
Output valve is adjusted optimization according to practical operation situation to itself and X respective values, i.e., the X inputted by user passes through blast factor
The corresponding mixing wind pressure value that function is calculated.
Wherein, step s110 does not have sequencing to step s130, and merely just citing illustrates, as long as carrying out this
Three steps, the present invention is not to being defined sequentially.
Step s140, using the primary air flow initial value, the material position factor to affect and the influenced by wind pressure factor, obtain
To First air value.
Wherein, because material position and mixing blast all have a certain impact to air quantity initial value, therefore, obtained blast is passed through
Factor to affect and material position factor to affect, air quantity initial value can be optimized, the present invention can be by by the beginning of primary air flow
Initial value, material position factor to affect and influenced by wind pressure factor are multiplied to obtain final accurate First air value.
The airflow value is actual to consider the mixing factor such as blast and material position, therefore, more accurately obtains primary air flow
Value, accurate due to First air value, therefore, the coal amount being worth to from primary air flow also can be accurate, that is, improve entrance
The accuracy of burner hearth coal amount, reaches and unit allocation is become more meticulous, and improves the Stability and dependability of machine set system.
Based on above-mentioned technical proposal, the method for primary air measuring provided in an embodiment of the present invention is a set of by devising
Complete fitting parameter, the rule run using pulverized coal preparation system, the calculating implemented to primary air flow, by pulverized coal preparation system load
Throttle opening is that main air intake aperture, pressure mix the dynamic real time datas such as blast, material position and is introduced into the control system, because
Primary air flow how much be to have direct relation with the coal amount of pulverized coal preparation system, load throttle opening, pressure, material position, in air quantity
In measurement, load throttle opening, pressure, material position etc. are entered into line function conversion, are converted into and accurate primary air flow.In the system
After putting into operation, when machine load throttle opening, pressure, material position etc. change, the measured value of primary air flow is also corresponding to be carried out in real time
Automatic change, so as to reach the primary air flow that accurately measurement is actual, data basis is established for unit cooperative operation.
The present invention is the parameter of correlation in being run by thermal power plant, by a series of logical relations, is accurately calculated
Primary air flow, reach Precise control.
Another embodiment of the present invention can also include on the basis of above-described embodiment：
According to the main air intake opening value, the material position value and the mixing wind pressure value, using predetermined bias function, obtain
To bias；
The First air value is modified using the bias, using correction result as First air value.
Wherein, according to actual conditions, in the case where needing more accurate control, not only to obtain it is various in the case of shadow
Ring factor, it is also necessary to know the bias under actual conditions, the First air value of acquisition can be entered by the bias of acquisition
Row amendment, obtain more accurately eliminating the value of biasing.
Wherein, predetermined bias function here can include valve opening bias function, material position bias function and/or blast
Bias function, i.e. this three have any one, and either any two or three have；All in the protection domain of the application, use
Family need it is several to be determined according to actual conditions, can be by three for example, if required precision of the user to First air value is very high
Individual bias function is all used.
It is wherein preferable, it is described according to the main air intake opening value, the material position value and the mixing wind pressure value, utilize
Predetermined bias function, obtaining bias can include：
According to the main air intake opening value and valve opening bias function, aperture bias is obtained；
According to the material position value and material position bias function, material position bias is obtained；
According to the mixing wind pressure value and blast bias function, blast bias is obtained；
By the aperture bias, the material position bias and the blast bias are weighted summation, are biased
Value；
Wherein, three biases are obtained, and ask by being weighted to three biases by three bigoted functions here
And computing, finally give a total bias.First air value is modified using the bias, using correction result as
First air value.Here the setting of the coefficient weighted will be configured according to actual conditions.Here do not limit.
Another embodiment of the present invention can also include on the basis of above-mentioned any embodiment：
The material position value is delayed by the first predetermined delay function；And/or
The mixing wind pressure value is delayed by the second predetermined delay function.
Wherein, after material position value here and mixing wind pressure value are obtained by collector, do not calculated subsequently directly,
But a delay is carried out by predetermined delay function first, carrying out the calculating of factor to affect and/or bias after the delay.
Whether and the time of delay here is determined according to actual conditions, and be required for can also basis into line delay
Specific service condition is determined according to user's request.
One more embodiment of the present invention can also include on the basis of above-mentioned any embodiment：
By pre-defined algorithm, air quantity proportion function, the material position factor function, the blast are corresponded to the valve opening
Factor function and the predetermined bias function are modified.
Because above-mentioned each function is all either equipment service condition or to carry out the acquisition such as testing according to actual production value
, it is likely to be updated, therefore, in order to which the moment can due to the improvement of the improvement of equipment, or computational methods
Accurate First air value is obtained, it is necessary to be modified to each function according to actual conditions.Preferably, nerve net can be utilized
Network algorithm and self-learning algorithm are modified to parameters.
Based on above-mentioned technical proposal, the method for primary air measuring provided in an embodiment of the present invention is a set of by devising
Complete fitting parameter, the rule run using pulverized coal preparation system, the calculating implemented to primary air flow, by pulverized coal preparation system load
Throttle opening is that main air intake aperture, pressure mix the dynamic real time datas such as blast, material position and is introduced into the control system, because
Primary air flow how much be to have direct relation with the coal amount of pulverized coal preparation system, load throttle opening, pressure, material position, in air quantity
In measurement, load throttle opening, pressure, material position etc. are entered into line function conversion, are converted into and accurate primary air flow.In the system
After putting into operation, when machine load throttle opening, pressure, material position etc. change, the measured value of primary air flow is also corresponding to be carried out in real time
Automatic change, so as to reach the primary air flow that accurately measurement is actual, data basis is established for unit cooperative operation.Also pass through
Factor to affect and amendment to function carry out more accurate measurement to primary air flow.
The embodiments of the invention provide the method for primary air measuring, can realize home intelligent by the above method
Gateway provides message, and the message information is handled.
The system of primary air measuring provided in an embodiment of the present invention is introduced below, primary air flow described below
The system of measurement and the method for above-described primary air measuring can be mutually to should refer to.
It refer to Fig. 2, the structured flowchart of the system for the primary air measuring that Fig. 2 is provided by the embodiment of the present invention；This is
System can include：
Sampler 100, for obtaining the main air intake opening value of coal pulverizer in generating set, material position value and mixing blast
Value；
Calculation of initial value device 200, for corresponding to air quantity proportion function according to the main air intake opening value and valve opening,
Obtain primary air flow initial value；
Material position factor calculator 300, for according to the material position value and material position factor function, obtaining the material position value to one
The material position factor to affect of secondary air quantity；
Blast factor calculator 400, for according to the mixing wind pressure value and blast factor function, obtaining the mixing wind
Influenced by wind pressure factor of the pressure value to primary air flow；
Wind Coverage Calculation device 500, for utilizing the primary air flow initial value, the material position factor to affect and the blast shadow
Factor is rung, obtains First air value.
Preferably, said system can also include：
Offset calculator, for according to the main air intake opening value, the material position value and the mixing wind pressure value, utilizing
Predetermined bias function, obtains bias；
Corrected Calculation device, for being modified using the bias to the First air value, using correction result as
First air value.
Preferably, the offset calculator 600 can include：
Aperture offset calculator, for according to the main air intake opening value and valve opening bias function, obtaining aperture
Bias；
Material position offset calculator, for according to the material position value and material position bias function, obtaining material position bias；
Blast offset calculator, for according to the mixing wind pressure value and blast bias function, obtaining blast bias；
Total offset calculator, for the aperture bias, the material position bias and the blast bias to be carried out
Weighted sum, obtain bias；
Preferably, the system can also include：
Material position delayer, for the material position value to be delayed by the first predetermined delay function；And/or blast delayer,
The mixing wind pressure value is delayed by the second predetermined delay function.
Preferably, the system can also include：
Function updates calculator, for by pre-defined algorithm, air quantity proportion function, the material to be corresponded to the valve opening
Position factor function, the blast factor function and the predetermined bias function are modified.
Wherein, the modules in above-mentioned each embodiment can be in any combination.Such as above-mentioned all devices are all present in
In the system.
Each embodiment is described by the way of progressive in specification, and what each embodiment stressed is and other realities
Apply the difference of example, between each embodiment identical similar portion mutually referring to.For system disclosed in embodiment
Speech, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part illustration
.
Professional further appreciates that, with reference to the unit of each example of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, the composition and step of each example are generally described according to function in the above description.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.Specialty
Technical staff can realize described function using distinct methods to each specific application, but this realization should not
Think beyond the scope of this invention.
Directly it can be held with reference to the step of method or algorithm that the embodiments described herein describes with hardware, processor
Capable software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), internal memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The method and system of primary air measuring provided by the present invention are described in detail above.It is used herein
Specific case is set forth to the principle and embodiment of the present invention, and the explanation of above example is only intended to help and understands
The method and its core concept of the present invention.It should be pointed out that for those skilled in the art, this is not being departed from
On the premise of inventive principle, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the present invention
In scope of the claims.
Claims (6)
- A kind of 1. method of primary air measuring, it is characterised in that including：Obtain the main air intake opening value of coal pulverizer in generating set, material position value and mixing wind pressure value；Air quantity proportion function is corresponded to according to the main air intake opening value and valve opening, obtains primary air flow initial value；According to the material position value and material position factor function, material position factor to affect of the material position value to primary air flow is obtained；According to the mixing wind pressure value and blast factor function, obtain the mixing wind pressure value to the influenced by wind pressure of primary air flow because Number；Using the primary air flow initial value, the material position factor to affect and the influenced by wind pressure factor, First air value is obtained；Also include：According to the main air intake opening value, the material position value and the mixing wind pressure value, predetermined bias letter is utilized Number, obtains bias；The First air value is modified using the bias, using correction result as First air value；Wherein, it is described according to the main air intake opening value, the material position value and the mixing wind pressure value, utilize predetermined bias letter Number, obtaining bias includes：According to the main air intake opening value and valve opening bias function, aperture bias is obtained；According to the material position value and material position bias function, material position bias is obtained；According to the mixing wind pressure value and blast bias function, blast bias is obtained；By the aperture bias, the material position bias and the blast bias are weighted summation, obtain bias.
- 2. the method as described in claim 1, it is characterised in that the main air intake aperture for obtaining coal pulverizer in generating set Include after value, material position value and mixing wind pressure value：The material position value is delayed by the first predetermined delay function；And/orThe mixing wind pressure value is delayed by the second predetermined delay function.
- 3. the method as described in claim 1, it is characterised in that also include：By pre-defined algorithm, air quantity proportion function, the material position factor function, the blast factor are corresponded to the valve opening Function and the predetermined bias function are modified.
- A kind of 4. system of primary air measuring, it is characterised in that including：Sampler, obtain the main air intake opening value of coal pulverizer in generating set, material position value and mixing wind pressure value；Calculation of initial value device, for corresponding to air quantity proportion function according to the main air intake opening value and valve opening, obtain one Secondary air quantity initial value；Material position factor calculator, for according to the material position value and material position factor function, obtaining the material position value to primary air flow Material position factor to affect；Blast factor calculator, for according to the mixing wind pressure value and blast factor function, obtaining the mixing wind pressure value pair The influenced by wind pressure factor of primary air flow；Wind Coverage Calculation device, for utilizing the primary air flow initial value, the material position factor to affect and the influenced by wind pressure factor, Obtain First air value；Also include：Offset calculator, for according to the main air intake opening value, the material position value and the mixing wind pressure value, Using predetermined bias function, bias is obtained；Corrected Calculation device, for being modified using the bias to the First air value, using correction result as once Airflow value；Wherein, the offset calculator includes：Aperture offset calculator, for according to the main air intake opening value and valve opening bias function, obtaining aperture biasing Value；Material position offset calculator, for according to the material position value and material position bias function, obtaining material position bias；Blast offset calculator, for according to the mixing wind pressure value and blast bias function, obtaining blast bias；Total offset calculator, for the aperture bias, the material position bias and the blast bias to be weighted Summation, obtains bias.
- 5. system as claimed in claim 4, it is characterised in that also include：Material position delayer, the material position value is delayed by the first predetermined delay function；And/or blast delayer, will be described mixed Wind pressure value is closed to be delayed by the second predetermined delay function.
- 6. system as claimed in claim 4, it is characterised in that also include：Function updates calculator, for by pre-defined algorithm, corresponding to air quantity proportion function to the valve opening, the material position because Number function, the blast factor function and the predetermined bias function are modified.
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| JPH09248482A (en) * | 1996-03-18 | 1997-09-22 | Ishikawajima Harima Heavy Ind Co Ltd | Coal production control apparatus of coal pulverizer |
| CN102600959A (en) * | 2012-04-05 | 2012-07-25 | 甘肃电力科学研究院 | Coordinated control system and coordinated control method for powder milling system of double-entering and double-leaving coal mill |
| CN103816987A (en) * | 2013-12-09 | 2014-05-28 | 国家电网公司 | Method for calculating powder output of double-inlet and double-outlet coal mill |
| CN103674145A (en) * | 2013-12-17 | 2014-03-26 | 上海交通大学 | Method for metering mass flow of coal as fired of coal-fired unit in real time |
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