CN108302551A - A kind of fired power generating unit furnace coal weight computational methods - Google Patents
A kind of fired power generating unit furnace coal weight computational methods Download PDFInfo
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- CN108302551A CN108302551A CN201711472826.8A CN201711472826A CN108302551A CN 108302551 A CN108302551 A CN 108302551A CN 201711472826 A CN201711472826 A CN 201711472826A CN 108302551 A CN108302551 A CN 108302551A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
- F23K2201/1006—Mills adapted for use with furnaces
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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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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of fired power generating unit furnace coal weight computational methods, a kind of fired power generating unit furnace coal weight computational methods, including switching switch is arranged according to coal pulverizer operation conditions, different counter circuits is switched to according to its practical operating status by switching switch, final furnace coal weight result of calculation is obtained after summarizing different counter circuits.The fired power generating unit furnace coal weight computational methods of the configuration double inlet and outlet coal mill of the present invention merge correlative factor, calculate more acurrate；Consider various working (start the coal pulverizer stage, stop coal pulverizer stage (blow empty or do not blow sky), unilateral operation, blow empty mill and start, do not blow empty mill and start etc.), calculates closer to reality, when operating mode changes, disturbance quantity is small；After calculating accurately, Changing load-acceleration is promoted, improves load responding ability.
Description
Technical field
The present invention relates to the calculating of fired power generating unit furnace coal weight, and in particular to a kind of thermal motor of configuration double inlet and outlet coal mill
Group furnace coal weight computational methods.
Background technology
Currently, with the fast development of global economy, energy consumption total amount rises year after year, and primary energy anxiety situation is increasingly
Seriously.Due to Regional Coal natural resources shortage, each coal-burning power plant's coal source is various, and coal inferior serves as electric coal and gradually settles.And it is double into
It is double go out coal pulverizer will be more widely used in thermal power plant to the adaptable feature of coal with it.However
The fired power generating unit for configuring double inlet and outlet coal mill, since as-fired coal calculates inaccuracy, larger unit allocation difficulty is that industry is generally acknowledged
The fact, and the requirement that power grid changes the control accuracy of thermal power generation unit with quick response network load is growing on and on.
Double inlet and outlet coal mill is gathered around there are one huge cylinder, which had not only served as the space for grinding coal dust, but also served as coal
The memory space of powder, in actual operation, the coal-supplying amount of feeder has no directly to correspond with the coal amount for entering burner hearth and close
System.In particular, during Coal pulverizer, powder outlet quantity is difficult to find that corresponding either statically or dynamically relationship with the size of coal-supplying amount.
So the coal dust amount into burner hearth cannot directly be substituted with coal-supplying amount.However, now in Large Ultra-Supercritical unit, as-fired coal
It is the important feedback magnitude of coordinated control system one to measure this parameter.Currently, the thermoelectricity of many configuration double inlet and outlet coal mills
Unit, furnace coal weight have the following problems：
Furnace coal weight can not be measured accurately, only by furnace coal weight and the theoretical coal-supplying amount of the conversion of capacity windshield plate aperture
There are when larger difference, especially unit lifting load, furnace coal weight calculate inaccuracy can cause to distribute coal amount it is inaccurate or
Or adding coal, few coal, certain negative effect can be generated to the regulation performance and principal parameter fast and stable of unit；
It opens, stopping coal pulverizer, there are prodigious deviations in the process：Traditional furnace coal weight calculates, and does not consider warm mill, paving coal, stops
Mill blows remaining coal, jumps the operating modes such as mill so that when these abnormal operation conditions occur, the calculating of as-fired coal caused compared with large disturbances,
Such as：After coal pulverizer and feeder start, need 10~20min that could establish coal pulverizer material position, coal pulverizer can be normal, stable
Ground is run；In coal pulverizer stopped process, need certain time that can remove the coal dust stored in coal pulverizer；
Be presently used for estimation furnace coal weight method mainly using capacity air force come convert, using capacity wind
Baffle opening is converted；The case where these methods have larger limitation, the former does not consider cylinder storage powder takes wind
Ability with coal dust, the latter do not consider that primary air pressure, coal dust storage situation take capacity wind the influence of powder ability but.
Invention content
The main purpose of the present invention is to provide a kind of reasonable design, dependable performance, realization is convenient, it is double to greatly improve configuration
Into it is double go out coal pulverizer the method that accurately calculates of fired power generating unit furnace coal weight.
The technical solution adopted by the present invention is：A kind of fired power generating unit furnace coal weight computational methods, including transported according to coal pulverizer
Row situation setting switching switch switches to different counter circuits according to its practical operating status by switching switch, summarizes difference
Counter circuit after obtain final furnace coal weight result of calculation, the furnace coal weight calculation formula is：
Q=[f (X2(A))*f(X3(A))+f(X2(B))*f(X3(B))]*f(X1)
Wherein, f (X1) it is material position correction factor, f (X2(A))、f(X2(B)) it is respectively the sides A/B capacity windshield plate aperture letter
Number, f (X3(A))、f(X3(B)) it is respectively the sides A/B primary air pressure correction factor, Q is calculating furnace coal weight as a result, unit is t/
h；
A coal pulverizers switching switch switching state be following three part mutually with result：
A feeders are run or the operation of B feeders, operating status result and A coal pulverizer operating status phases and, be as a result delayed
It is exported after 180 seconds；This operating mode represents coal pulverizer and has been turned on, and feeder just starts, and coal pulverizer is in the paving coal stage, actually enters stove
The coal amount of thorax is considered 0；
The operation of A feeders or B feeder operating status results export pulse in 4 minutes after negating, with A coal pulverizer operating statuses
Mutually with, then the value that negates of result with A coal-grindings position average value less than 150Pa be delayed 10 seconds after final result phase with obtain
Final result；It is wholly off that this operating mode represents feeder, and coal pulverizer also has many also in operating status, at this time in coal pulverizer
Remaining coal, practical furnace coal weight are calculated with above-mentioned furnace coal weight computational methods formula, and after 4 minutes or coal pulverizer does not have coal potential drop extremely
When 150Pa or less, it is believed that without remaining coal in coal pulverizer, result of calculation is down to 0 according to the rate of -15t/min；
A coal-grindings position average value is more than after 200Pa results are delayed 60 seconds, then with A coal pulverizer operating status phases or obtain most
Terminate fruit；This operating mode represent coal pulverizer start after, coal of having a surplus in mill tube, even if feeder does not start, into boiler coal amount still
So formula 1 is used to calculate, result of calculation is slowly switched to 1 result of calculation of formula by 0.
The present invention compared with the existing technology has the following advantages and effect：
1, the fired power generating unit furnace coal weight computational methods of present invention configuration double inlet and outlet coal mill merge correlative factor, calculate
It is more acurrate；Consider that various working (starts the coal pulverizer stage, stops the coal pulverizer stage (blow sky or do not blow sky), unilateral operation, blows sky
Grind and start, do not blow empty mill startup etc.), calculating is closer to reality, and when operating mode changes, disturbance quantity is small；After calculating accurately, promoted
Changing load-acceleration improves load responding ability.
Description of the drawings
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.
Fig. 1 is the fired power generating unit furnace coal weight computational methods furnace coal weight major parameter relational graph of the present invention；
Fig. 2 is the fired power generating unit furnace coal weight computational methods furnace coal weight computational methods logic chart of the present invention；
Fig. 3 is the fired power generating unit furnace coal weight computational methods unilateral side capacity wind of the present invention and the functional relation song of furnace coal weight
Line；
Fig. 4 is that the fired power generating unit furnace coal weight computational methods coal pulverizer material position of the present invention corrects the functional relation of furnace coal weight
Curve；
Fig. 5 is that the fired power generating unit furnace coal weight computational methods primary air pressure of the present invention corrects the functional relation song of furnace coal weight
Line；
Fig. 6 is that the fired power generating unit furnace coal weight computational methods capacity wind of the present invention and bypass wind decouple relation curve.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Embodiment 1：
With reference to figure 1 and Fig. 2, as depicted in figs. 1 and 2, a kind of fired power generating unit furnace coal weight computational methods, including according to coal-grinding
Machine operation conditions setting switching switch switches to different counter circuits according to its practical operating status by switching switch, summarizes
Final furnace coal weight result of calculation is obtained after different counter circuits, the furnace coal weight calculation formula is：
Q=[f (X2(A))*f(X3(A))+f(X2(B))*f(X3(B))]*f(X1)
Wherein, f (X1) it is material position correction factor, f (X2(A))、f(X2(B)) it is respectively the sides A/B capacity windshield plate aperture letter
Number, f (X3(A))、f(X3(B)) it is respectively the sides A/B primary air pressure correction factor, Q is calculating furnace coal weight as a result, unit is t/
h；
By taking A coal pulverizers as an example, A coal pulverizers switching switch switching state be following three part mutually with result：
A feeders are run or the operation of B feeders, operating status result and A coal pulverizer operating status phases and, be as a result delayed
It is exported after 180 seconds；This operating mode represents coal pulverizer and has been turned on, and feeder just starts, and coal pulverizer is in the paving coal stage, actually enters stove
The coal amount of thorax is considered 0；
The operation of A feeders or B feeder operating status results export pulse in 4 minutes after negating, with A coal pulverizer operating statuses
Mutually with, then the value that negates of result with A coal-grindings position average value less than 150Pa be delayed 10 seconds after final result phase with obtain
Final result；It is wholly off that this operating mode represents feeder, and coal pulverizer also has many also in operating status, at this time in coal pulverizer
Remaining coal, practical furnace coal weight are calculated with above-mentioned furnace coal weight computational methods formula, and after 4 minutes or coal pulverizer does not have coal potential drop extremely
When 150Pa or less, it is believed that without remaining coal in coal pulverizer, result of calculation is down to 0 according to the rate of -15t/min；
A coal-grindings position average value is more than after 200Pa results are delayed 60 seconds, then with A coal pulverizer operating status phases or obtain most
Terminate fruit；This operating mode represent coal pulverizer start after, coal of having a surplus in mill tube, even if feeder does not start, into boiler coal amount still
So formula 1 is used to calculate, result of calculation is slowly switched to 1 result of calculation of formula by 0.
The technical solution adopted in the present invention is：
Although the furnace coal weight of fired power generating unit of configuration double inlet and outlet coal mill cannot be measured directly, furnace coal weight it is big
It is small to have certain relationship with other relevant parameters, such as：Capacity air quantity A/B baffle openings, bypass air door A/B baffle openings, coal pulverizer
The sides A/B material position, primary air pressure and separator rotating speed etc., analyze operation mechanism on the basis of, it is qualitative obtain roughly these parameters with
The relationship of as-fired coal, as shown in table 1:
Table 1：The principal element of furnace coal weight is influenced according to the Analysis on Running Mechanism of double inlet and outlet coal mill
In upper table, × indicate that relevant pole is weak ,+weak correlation, ++ medium correlation, +++ strong correlation.
By table 1 it is recognised that if separator rotating speed is constant in the case of, larger parameter is main with furnace coal weight relationship
It is capacity wind aperture, material position and primary air pressure, furnace coal weight calculation formula can be expressed as Fig. 1, pass through a large number of experiments, analysis examination
It tests result and obtains major parameter relation function (mainly using the conversion of capacity windshield plate aperture, with primary air pressure and coal pulverizer material position
It corrects).As shown in Figure 1.
If considering to start the coal pulverizer stage, stopping situations such as coal pulverizer stage (blow sky or do not blow sky), unilateral operation, blow sky
It grinds and starts, do not blow empty mill startup etc., and by this situation involvement calculation formula, result of calculation is more accurate.
Warm mill stage (without powder startup is deposited)：
When coal pulverizer operation, and feeder is not run, and capacity air door is divulging information with cold-hot air door and warming up mill, prepares coal-grinding
Machine puts into powder operation processed, and double inlet and outlet coal mill is in during warm mill at this time, and capacity air door has certain aperture, the wind powder of mill
Space passes through certain capacity wind is had.But since coal pulverizer does not enter the formal powder stage processed also, so capacity wind is not
Coal dust is carried, the coal dust amount into burner hearth is 0.
Establish the material position stage：
After the warm mill of coal pulverizer reaches set point of temperature, operations staff can generally open First feeder, coal pulverizer
Material position establishment stage is entered, coal pulverizer, which establishes the mark that material position starts, is：Coal pulverizer is run, and arbitrary feeder is just run
10~20min in, begin with coal amount and enter in coal pulverizer mill tube.In the process, the size of capacity wind, coal-supplying amount is to entering stove
The calculating of coal amount has an impact, and still, this relationship is complex, can be with described previously with the raising of material position in mill tube
Formula (1) approximate representation furnace coal weight calculating.
Empty startup (depositing powder startup) is not blown：
When coal pulverizer fault trip or while stopping not blowing sky and depositing powder, a large amount of powder amount will be accumulated in mill tube, when next
When secondary startup coal pulverizer, even if not starting feeder, as long as there is capacity wind to be passed through, coal-grinding is run, then capacity wind will be taken
Band deposits powder and is directly entered burner hearth.This operating status has crossed material position and has established this link.Even if feeder not running, accordingly
Coal weighing is similar when furnace coal weight calculating is just run with normal material position.
The normal material position operation of coal pulverizer:
It is calculated according to above-mentioned formula (1).
Null process is blown in coal pulverizer stoppage in transit：
When coal pulverizer needs to exit pulverized coal preparation system, stop feeder first, but capacity air door also needs to keep appropriate to open
Powder of depositing in mill still through First air is blown into burner hearth by degree, and to have the function that blow sky coal pulverizer powder drum, this is and middling speed
One of maximum difference of coal pulverizer operation characteristic.The process material position can decline gradually, and respective volume wind carries under the ability of powder amount
Drop.When dropping to (level signals be less than 150Pa) to a certain degree, it is believed that coal pulverizer memory powder is almost blown sky, coal meter
Can this TV station pulverizer capacity slowly be switched to 0 when calculation.
Coal pulverizer trips：
After coal pulverizer trips, the outlet portal of all mills is closed rapidly, and the wind mill diagram diameter into burner hearth blocks rapidly, can be with
This process is simulated with the shorter process of an inertia time.That is, furnace coal weight is jumping the furnace coal weight of mill moment via one
0 is reduced to rapidly after rank inertia.Inertia time, it is mainly related with coal pipe and primary air pressure, it is practical generally about in 2-5s or so
It can ignore when engineer application.
In summary coal pulverizer operating status, furnace coal weight calculate Fig. 2 such as and state (by taking A coal pulverizers as an example), comprehensive meter
It calculates result and rational rate variation function is set, when preventing operating mode from changing, furnace coal weight calculates mutation, is disturbed to the control of coal amount
It is dynamic too big, influence unit safety operation.
According to the computational methods of Fig. 2, Logical Configuration is carried out in DCS control systems for the coal amount of each coal pulverizer.
By coal pulverizer design parameter, the functional value in calculation formula is determined, and by testing micro-adjustment.(to the north of live again
For the MGS4366 type double inlet and outlet coal mills of production)
(1) function relation curve of unilateral capacity wind and furnace coal weight is as shown in Figure 3；
(2) function relation curve of coal pulverizer material position amendment furnace coal weight is as shown in Figure 4；
(3) function relation curve of primary air pressure amendment furnace coal weight is as shown in Figure 5；
A certain proportion of control is carried out to capacity wind and bypass wind, the influence for reducing bypass wind disturbing factor is as shown in Figure 6.
Computational methods described in this specification, function curve, delay time can be different due to the difference of equipment.
The fired power generating unit furnace coal weight computational methods and Traditional calculating methods of the configuration double inlet and outlet coal mill of the present invention are (only
Consider the method for capacity air quantity or capacity windshield plate aperture；Or the scheme of conversion is measured by coal powder density) compare, fusion is related
Factor calculates more acurrate；Consider that various working (starts the coal pulverizer stage, stops the coal pulverizer stage (blow sky or do not blow sky), is unilateral
Run, blow the startup of sky mill, do not blow empty mill startup etc.), it calculates closer to reality, when operating mode changes, disturbance quantity is small；It calculates accurate
After really, Changing load-acceleration is promoted, improves load responding ability
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (1)
1. a kind of fired power generating unit furnace coal weight computational methods, which is characterized in that switch including being arranged according to coal pulverizer operation conditions
Switch switches to different counter circuits according to its practical operating status by switching switch, is obtained after summarizing different counter circuits
To final furnace coal weight result of calculation, the furnace coal weight calculation formula is：
Q=[f (X2(A))*f(X3(A))+f(X2(B))*f(X3(B))]*f(X1)
Wherein, f (X1) it is material position correction factor, f (X2(A))、f(X2(B)) it is respectively the sides A/B capacity windshield plate aperture function, f
(X3(A))、f(X3(B)) it is respectively the sides A/B primary air pressure correction factor, Q is calculating furnace coal weight as a result, unit is t/h；
A coal pulverizers switching switch switching state be following three part mutually with result：
A feeders are run or the operation of B feeders, operating status result and A coal pulverizer operating status phases and as a result delay 180 seconds
After export；This operating mode represents coal pulverizer and has been turned on, and feeder just starts, and coal pulverizer is in the paving coal stage, actually enters burner hearth
Coal amount is considered 0；
The operation of A feeders or B feeder operating status results export pulse in 4 minutes after negating, with A coal pulverizer operating status phases
With, then the value that negates of result with A coal-grindings position average value less than 150Pa be delayed 10 seconds after final result phase with obtain most
Terminate fruit；It is wholly off that this operating mode represents feeder, and coal pulverizer also has many remaining also in operating status, at this time in coal pulverizer
Coal, practical furnace coal weight are calculated with above-mentioned furnace coal weight computational methods formula, and after 4 minutes or coal pulverizer does not have coal potential drop extremely
When 150Pa or less, it is believed that without remaining coal in coal pulverizer, result of calculation is down to 0 according to the rate of -15t/min；
A coal-grindings position average value be more than 200Pa results be delayed 60 seconds after, then with A coal pulverizer operating status phases or the most termination obtained
Fruit；After this operating mode represents coal pulverizer startup, coal of having a surplus in mill tube, even if feeder does not start, the coal amount into boiler is still wanted
It is calculated with formula 1, result of calculation is slowly switched to 1 result of calculation of formula by 0.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111486472A (en) * | 2020-03-27 | 2020-08-04 | 扬州第二发电有限责任公司 | Medium-speed mill automatic start-stop control system suitable for deep peak shaving of direct-blowing coal-fired unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011032236A1 (en) * | 2009-09-21 | 2011-03-24 | Kailash & Stefan Pty Ltd | Combustion control system |
| CN103742937A (en) * | 2013-12-30 | 2014-04-23 | 广东电网公司电力科学研究院 | Coal feeding control method and system of double-inlet and double-outlet coal mill |
| CN103778343A (en) * | 2014-02-08 | 2014-05-07 | 国家电网公司 | Method for measuring instant as-fired coal amount of double-inlet double-outlet coal mill |
| JP2014137196A (en) * | 2013-01-17 | 2014-07-28 | Ube Machinery Corporation Ltd | Crushed raw material combustion system and method of controlling the same |
| CN104941783A (en) * | 2015-05-20 | 2015-09-30 | 国家电网公司 | Double-in and double-out coal mill thermal power generating unit instantaneous fuel optimization system and method |
| CN205640986U (en) * | 2016-05-06 | 2016-10-12 | 长安益阳发电有限公司 | Boiler combustion controlling means based on primary air fan |
-
2017
- 2017-12-29 CN CN201711472826.8A patent/CN108302551B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011032236A1 (en) * | 2009-09-21 | 2011-03-24 | Kailash & Stefan Pty Ltd | Combustion control system |
| JP2014137196A (en) * | 2013-01-17 | 2014-07-28 | Ube Machinery Corporation Ltd | Crushed raw material combustion system and method of controlling the same |
| CN103742937A (en) * | 2013-12-30 | 2014-04-23 | 广东电网公司电力科学研究院 | Coal feeding control method and system of double-inlet and double-outlet coal mill |
| CN103778343A (en) * | 2014-02-08 | 2014-05-07 | 国家电网公司 | Method for measuring instant as-fired coal amount of double-inlet double-outlet coal mill |
| CN104941783A (en) * | 2015-05-20 | 2015-09-30 | 国家电网公司 | Double-in and double-out coal mill thermal power generating unit instantaneous fuel optimization system and method |
| CN205640986U (en) * | 2016-05-06 | 2016-10-12 | 长安益阳发电有限公司 | Boiler combustion controlling means based on primary air fan |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111486472A (en) * | 2020-03-27 | 2020-08-04 | 扬州第二发电有限责任公司 | Medium-speed mill automatic start-stop control system suitable for deep peak shaving of direct-blowing coal-fired unit |
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