CN105588122B - A kind of fuel control method and system applied to CFBB - Google Patents
A kind of fuel control method and system applied to CFBB Download PDFInfo
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- CN105588122B CN105588122B CN201510975542.5A CN201510975542A CN105588122B CN 105588122 B CN105588122 B CN 105588122B CN 201510975542 A CN201510975542 A CN 201510975542A CN 105588122 B CN105588122 B CN 105588122B
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- Prior art keywords
- fuel control
- fuel
- temperature
- value
- control loop
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
- F23C10/30—Control devices specially adapted for fluidised bed, combustion apparatus for controlling the level of the bed or the amount of material in the bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/002—Regulating fuel supply using electronic means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a kind of fuel control method and system applied to CFBB, including：The deviation of main vapour pressure of boiler setting value and actual main vapour pressure value exports left side fuel control value and right side fuel control value respectively after boiler master PID control；The deviation of left side temperature and right side temperature after temperature PID control, exports left side temperature control value and right side temperature control value respectively with setting deviation；Left side fuel control value be added with left side temperature control value after with left side natural fuel amount after fuel PID control, output left side feeder coal-supplying amount Regulate signal；Right side fuel control value be added with right side temperature control value after with right side natural fuel amount after fuel PID control, output right side feeder coal-supplying amount Regulate signal.Beneficial effect of the present invention：Realize unilateral fuel quantity from main regulation, change traditional approach post fuel occur in unilateral fuel quantity fluctuation situation and adjust influence to opposite side bed temperature.
Description
Technical field
The present invention relates to a kind of fuel control method and system suitable for CFBB, for realizing both sides bed
The fuel distribution of warm Balance route, more particularly to a kind of balanced control for realizing both sides bed temperature in the case of fuel unusual fluctuations
System.
Background technology
CFBB have that coal adaptability is wide, high combustion efficiency, environmental performance are good, load regulation range is big and
Ash comprehensive utilization value it is high the advantages that, in recent years station boiler, old boiler transformation and burn various solid waste and
The fields such as various biomass have obtained rapid development.
Circulating fluidized bed boiler fuel control loop is to realize the key link that CFBB automatically controls.Pass through
Fuel control loop realizes the control to unit load, while fuel regulation loop is also realized to boiler left and right side bed temperature
Control.
Traditional circulating fluidized bed boiler fuel control program is：Main vapour pressure setting value and the deviation of main vapour pressure input
Boiler master PID controller, it is exported is realized to recycle stream by the feeder of left side control loop, right side control loop respectively
The control of bed temperature, right side bed temperature on the left of fluidized bed boiler.Its typical fuel control principle drawing is as shown in Figure 1.
Boiler load control instruction exports the coal amount instruction on basis, this is current unit after Function generator FX1 conversions
Fuel quantity command signal required by load.
Fuel quantity is instructed and the deviation of natural fuel amount is sent into multiplier, and number of units is run with the feeder based on automatic running
Corresponding gain coefficient is multiplied, and its output enters PID controller, and the output valve of controller refers to as the public coal amount of feeder
Order.
According to above-mentioned control program, if in the case of the feeder emergency stop valve trip of left side, it is stable and quick for maintenance boiler combustion
The influence of coal-supplying amount fluctuation is eliminated, can be increased in running status feeder coal-supplying amount, and then causes the overall coal-supplying amount in right side
Rise, quick elevated situation will inevitably occur in right side bed temperature, and this will cause left and right sides bed temperature deviation to increase, and influence
The stabilization of operating states of the units, while the rapid increase of unilateral bed temperature will also influence safe operation of the boiler.
The content of the invention
The invention aims to solve the above problems, there is provided a kind of fuel control applied to CFBB
Method and system processed, fuel control loop, the control combustion of right side bed temperature are controlled by bed temperature on the left of increasing in Fuel Control System
Material control loop increases temperature deviation PID to realize the independent control to left/right side bed temperature for left and right sides bed temperature deviation
To realize the Balance route to left/right side bed temperature.
To achieve the above object, the present invention uses following technical proposals：
A kind of fuel control method applied to CFBB, including：
Main vapour pressure of boiler setting value and the deviation of actual main vapour pressure pass through balance after boiler master PID control
Control algolithm exports left side fuel control value and right side fuel control value respectively；
The deviation of left side bed temperature and right side bed temperature after temperature PID control, exports left side respectively with setting deviation
Bed temperature correction value and right side bed temperature correction value；
The left side fuel control value is controlled after being added with left side temperature corrected value with left side natural fuel amount by fuel PID
After system, the regulating command of the coal-supplying amount of output left side feeder；
The right side fuel control value is controlled after being added with right side temperature corrected value with right side natural fuel amount by fuel PID
After system, the regulating command of the coal-supplying amount of output right side feeder.
The balancing control algorithm is that the signal averaging of boiler master output is distributed into left side fuel control value and right side
Fuel control value.
A kind of system of fuel control method using applied to CFBB, including：Boiler master loop, a left side
Side fuel control loop, right side fuel control loop and temperature adjustmemt control loop；
The boiler master loop is connected with left side fuel control loop and right side fuel control loop respectively, the temperature
Correction and Control loop is connected with left side fuel control loop and right side fuel control loop respectively；
The boiler master loop exports left and right side fuel control instruction respectively by balance controller；The temperature is repaiied
Positive control loop exports the instruction of left and right side temperature adjustmemt respectively；The left side fuel control loop receives left side fuel control and referred to
Order and the value of left side temperature control instruction, the regulating command of the coal-supplying amount of output left side feeder after PID control；The right side
Side fuel control loop receives the value of right side fuel control instruction and right side temperature control instruction, is exported after PID control right
The regulating command of the coal-supplying amount of side feeder.
Further, the left side fuel control loop includes：
First adder module, the first proportional plus integral plus derivative controller PID and the first manual operator being sequentially connected；Described
The output of one manual operator is connected with left side feeder group.
Further, the right side fuel control loop includes：
Second adder module, the second proportional plus integral plus derivative controller PID and the second manual operator being sequentially connected；Described
The output of two manual operators is connected with right side feeder group.
Further, the temperature adjustmemt control loop includes：
The 3rd proportional plus integral plus derivative controller PID being sequentially connected and the 3rd manual operator；3rd PID
Controller PID input connects numerical value generator and left and right sides temperature error signal respectively；The output of 3rd manual operator
Connection left side fuel control loop and right side fuel control loop respectively.
Preferably, the output valve of the numerical value generator is 0.
The beneficial effects of the invention are as follows：
By the way that traditional single fuel main control loop is expanded into independent fuel master control A, fuel master control B, correspond respectively to
Fuel regulation at left and right sides of CFBB.Fuel master control A, fuel master control B each independently receive higher level's boiler main
The output signal always instructed is controlled, and realizes the independent control of left and right sides fuel quantity.
The present invention realize unilateral fuel quantity from main regulation, i.e., when unilateral (left side or right side) fuel quantity occur it is larger
During fluctuation, unilateral feeder fuel quantity is adjusted by the fuel circuit on unilateral (left side or right side).This has become traditional approach
Influence of the post fuel regulation to opposite side bed temperature occurs in unilateral fuel quantity fluctuation situation.
This control program under RB operating modes and has splendid control performance under big load disturbance operating mode.This control program simultaneously
The controlled device of regulation amendment using both sides average bed temperature deviation as fuel quantity, by creating brand-new bed temperature deviation corrective loop
To realize the purpose for maintaining both sides bed temperature balanced.
Brief description of the drawings
Fig. 1 is fuel control principle schematic diagram of the present invention.
Embodiment：
The present invention will be further described with example below in conjunction with the accompanying drawings：
A kind of fuel control method applied to CFBB, pass through bed on the left of increasing in Fuel Control System
Temperature control fuel control loop, right side bed temperature control fuel control loop to realize the independent control to left/right side bed temperature, simultaneously
Increase temperature deviation PID for left and right sides bed temperature deviation to realize the Balance route to left/right side bed temperature.Specific method includes：
The deviation of main vapour pressure of boiler setting value and actual main vapour pressure value is after boiler master PID control, by flat
Account method and export left side fuel control value and right side fuel control value respectively；Balancing control algorithm is by boiler master output order
Mean allocation is into left side fuel control value and right side fuel control value.
The deviation of left side bed temperature and right side temperature after temperature PID control, exports left side respectively with setting deviation
Temperature control value and right side temperature control value；Left side fuel control value be added with left side temperature control value after with left side natural fuel
Amount is after fuel Control PID computing, the regulating command of the coal-supplying amount of output left side feeder；Right side fuel control value and right side
After the addition of temperature control value with right side natural fuel amount after fuel Control PID computing, the coal-supplying amount of output right side feeder
Regulating command.
A kind of Fuel Control System using the above method, as shown in figure 1, including：
Boiler master loop, left side fuel control loop, right side fuel control loop and temperature adjustmemt control loop；Boiler
Main control loop is connected with left side fuel control loop and right side fuel control loop respectively, temperature adjustmemt control loop respectively with a left side
Side fuel control loop connects with right side fuel control loop；
Boiler master loop exports left and right side fuel control signal by balance controller respectively；Temperature adjustmemt controls back
Road exports left and right side temperature control signals respectively；Left side fuel control loop receives left side fuel control signal and left side temperature
The value of control signal, the Regulate signal of the coal-supplying amount of output left side feeder after PID control；Right side fuel control loop connects
The value of right side fuel control signal and right side temperature control signals is received, the coal-supplying amount of output right side feeder after PID control
Regulate signal.
As a preferred embodiment, the composition of left side fuel control loop：
It is made up of the adder block Σ 1, proportional plus integral plus derivative controller PID1 and manual operator 1 being sequentially connected.
Adder block Σ 1 enters PID control after the output of balance controller is added with the output of equalized temperature loop
Device PID1 processed, the regulation of left side fuel quantity is completed by PID1 computing function, PID1 calculating output is laggard by manual operator 1
Enter each feeder corresponding to the fuel control loop of left side, fuel adjusting process is completed by the coal-supplying amount change of feeder.
As a preferred embodiment, the composition of right side fuel control loop：
It is made up of the adder block Σ 2, proportional plus integral plus derivative controller PID2, manual operator 2 being sequentially connected.
Adder block Σ 2 enters PID control after the output of balance controller is added with the output of equalized temperature loop
Device PID2 processed, the regulation of right side fuel quantity is completed by PID2 computing function, PID2 calculating output is laggard by manual operator 2
Enter each feeder corresponding to the fuel control loop of right side, fuel adjusting process is completed by the coal-supplying amount change of feeder.
To be repaiied as a preferred embodiment, present invention also adds the temperature for correcting left/right side temperature deviation
Positive control loop.The composition in temperature balance control loop：
Numerical value caused by left and right sides temperature error signal and numerical value generator is separately input to proportional plus integral plus derivative controller
PID3, proportional plus integral plus derivative controller PID3 are connected with manual operator 3.The tune of left and right sides temperature deviation is completed by controller PID3
Section, it is finally reached the purpose of left and right sides bed temperature balance.
As a preferred embodiment, numerical value caused by numerical value generator is 0.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.
Claims (4)
1. a kind of fuel control method applied to CFBB, it is characterized in that, including：
Main vapour pressure of boiler setting value and the deviation of actual main vapour pressure are controlled after boiler master PID control by balancing
Algorithm exports left side fuel control value and right side fuel control value respectively；The balancing control algorithm is by boiler master output
Signal averaging is distributed into left side fuel control value and right side fuel control value；
The deviation of left side bed temperature and right side bed temperature after temperature PID control, exports left side bed temperature respectively with setting deviation
Correction value and right side bed temperature correction value；
The left side fuel control value with left side natural fuel amount passes through fuel PID control after being added with left side temperature corrected value
Afterwards, the regulating command of the coal-supplying amount of output left side feeder；
The right side fuel control value with right side natural fuel amount passes through fuel PID control after being added with right side temperature corrected value
Afterwards, the regulating command of the coal-supplying amount of output right side feeder.
2. a kind of system using the fuel control method for being applied to CFBB as claimed in claim 1, it is special
Sign is, including：Boiler master loop, left side fuel control loop, right side fuel control loop and temperature adjustmemt control loop；
The boiler master loop is connected with left side fuel control loop and right side fuel control loop respectively, the temperature adjustmemt
Control loop is connected with left side fuel control loop and right side fuel control loop respectively；
The temperature adjustmemt control loop includes：
The 3rd proportional plus integral plus derivative controller PID being sequentially connected and the 3rd manual operator；3rd PID control parameter
Device PID input connects numerical value generator and left and right sides temperature error signal respectively；The output difference of 3rd manual operator
Connection left side fuel control loop and right side fuel control loop；The output valve of the numerical value generator is 0；
The boiler master loop exports left and right side fuel control instruction respectively by balance controller；The temperature adjustmemt control
Loop processed exports the instruction of left and right side temperature adjustmemt respectively；The left side fuel control loop receive left side fuel control instruction and
The value of left side temperature adjustmemt instruction, the regulating command of the coal-supplying amount of output left side feeder after PID control；The right side combustion
Expect that control loop receives right side fuel control instruction and the value of right side temperature adjustmemt instruction, output right side is given after PID control
The regulating command of the coal-supplying amount of coal machine.
3. a kind of system of fuel control method using applied to CFBB as claimed in claim 2, it is special
Sign is that the left side fuel control loop includes：
First adder module, the first proportional plus integral plus derivative controller PID and the first manual operator being sequentially connected；It is described first-hand
The output of behaviour's device is connected with left side feeder group.
4. a kind of system of fuel control method using applied to CFBB as claimed in claim 2, it is special
Sign is that the right side fuel control loop includes：
Second adder module, the second proportional plus integral plus derivative controller PID and the second manual operator being sequentially connected；The second-hand
The output of behaviour's device is connected with right side feeder group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510975542.5A CN105588122B (en) | 2015-12-22 | 2015-12-22 | A kind of fuel control method and system applied to CFBB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510975542.5A CN105588122B (en) | 2015-12-22 | 2015-12-22 | A kind of fuel control method and system applied to CFBB |
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| Publication Number | Publication Date |
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| CN105588122A CN105588122A (en) | 2016-05-18 |
| CN105588122B true CN105588122B (en) | 2018-02-13 |
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| CN201510975542.5A Expired - Fee Related CN105588122B (en) | 2015-12-22 | 2015-12-22 | A kind of fuel control method and system applied to CFBB |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402852B (en) * | 2016-08-31 | 2018-10-02 | 中国神华能源股份有限公司 | A method of burning coal |
| CN107525058B (en) * | 2017-09-26 | 2020-02-21 | 杭州和利时自动化有限公司 | Boiler fuel demand determining method, regulating method and system |
| CN108119909B (en) * | 2017-12-13 | 2019-03-05 | 浙江工业大学 | A kind of stalk direct combustion circulating fluidized bed boiler varying duty vapour pressure tracking and controlling method |
| CN110160081B (en) * | 2019-05-27 | 2020-10-23 | 国电科学技术研究院有限公司 | Main control feed-forward construction method and device for boiler in thermal generator set |
| CN111550777B (en) * | 2020-06-23 | 2022-05-13 | 杭州和利时自动化有限公司 | Method and system for controlling coal feeding amount of circulating fluidized bed boiler |
| CN113359442B (en) * | 2021-05-27 | 2024-01-30 | 华北电力科学研究院有限责任公司 | Coal water ratio control method and system |
| CN114704828B (en) * | 2022-05-09 | 2023-09-19 | 北京和隆优化科技股份有限公司 | CFB boiler load control method and system for blending coal slime |
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| JP2008157473A (en) * | 2006-12-20 | 2008-07-10 | Chugoku Electric Power Co Inc:The | Pressure fluidized-bed hybrid power system and method of keeping constant layer height of pressure fluidized-bed boiler |
| CN101949536A (en) * | 2010-09-14 | 2011-01-19 | 广东电网公司电力科学研究院 | Balanced coal supply control device of large circulating fluidized bed boiler |
| CN104807003A (en) * | 2015-04-22 | 2015-07-29 | 大唐武安发电有限公司 | Fuel-self-balancing-based bed temperature control system and method for circulating fluidized bed boiler |
| CN204593381U (en) * | 2015-04-14 | 2015-08-26 | 华北电力大学 | A kind of Circulating Fluidized Bed Temperature deviation looped system |
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2015
- 2015-12-22 CN CN201510975542.5A patent/CN105588122B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008157473A (en) * | 2006-12-20 | 2008-07-10 | Chugoku Electric Power Co Inc:The | Pressure fluidized-bed hybrid power system and method of keeping constant layer height of pressure fluidized-bed boiler |
| CN101949536A (en) * | 2010-09-14 | 2011-01-19 | 广东电网公司电力科学研究院 | Balanced coal supply control device of large circulating fluidized bed boiler |
| CN204593381U (en) * | 2015-04-14 | 2015-08-26 | 华北电力大学 | A kind of Circulating Fluidized Bed Temperature deviation looped system |
| CN104807003A (en) * | 2015-04-22 | 2015-07-29 | 大唐武安发电有限公司 | Fuel-self-balancing-based bed temperature control system and method for circulating fluidized bed boiler |
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