CN105841145A - Rapid load increase and decrease control system of circulating fluidized bed boiler - Google Patents
Rapid load increase and decrease control system of circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN105841145A CN105841145A CN201610395238.8A CN201610395238A CN105841145A CN 105841145 A CN105841145 A CN 105841145A CN 201610395238 A CN201610395238 A CN 201610395238A CN 105841145 A CN105841145 A CN 105841145A
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- Prior art keywords
- load
- air flow
- secondary air
- primary air
- coal
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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
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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
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses a rapid load increase and decrease control system of a circulating fluidized bed boiler. The rapid load increase and decrease control system is provided with a boiler load-coal quantity expert system, a load-primary air expert system, a load-secondary air expert system and a load prediction control system. An expert control algorithm is adopted, operating experience and the experience of operators are adopted as a knowledge base, the variable quantities of the coal quantity, the primary air volume and the secondary air volume are subjected to dynamic inference, and the aim of rapid load increase and decrease is achieved; and the change trends of loads and the bed temperature are dynamically judged through prediction control, and therefore the adding speed of the coal quantity and the adding speed of the air volumes are dynamically adjusted, and safety control and precision control over the circulating fluidized bed boiler are achieved.
Description
Technical field
The present invention relates to control system for circulating fluidized bed boiler, particularly relate to a kind of CFBB fast lifting load control system.
Background technology
The domestic cycle automatic operational percentage of fluidized-bed combustion boiler combustion control loop is low at present, even if some scene has put into automatically, but it is the most poor to the adaptation ability of changing load particularly fast lifting load, lifting load speed is slow, easily cause toning, it is extremely difficult to Expected Results, it is mainly reflected in the following aspects: 1, when ature of coal and load fluctuation, coal-supplying amount and corresponding air quantity needed for corresponding load need to change therewith, but currently without a rational load-coal amount, load-primary air flow and load-secondary air flow relation curve；2, the obvious inertia existed because of main vapour pressure and hysteresis quality, it is achieved it accurately controls to be difficult to accomplish.
In sum, fast lifting load the most important thing is conservative control wind and the speed of coal addition and variable quantity, to meet the requirement that boiler is quickly exerted oneself, it is with burning of coal speed, the time of staying and excess air coefficient in stove are related, and currently available technology cannot solve, and therefore develop native system.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of CFBB fast lifting load control system, it is achieved the fast lifting load of boiler and the accurate regulation of load.
For achieving the above object, the present invention is by the following technical solutions:
A kind of CFBB fast lifting load control system, it is characterised in that be provided with load-coal amount specialist system, load-primary air flow specialist system, load-secondary air flow specialist system and load prediction control system.
Load-coal amount specialist system
Heave amplitude according to load automatically determines coal amount to be added.The experience of operative employee is arranged, composition load-coal amount expert knowledge library, during lifting load, the setting value of input load, load-coal amount specialist system carrys out the knots modification of Dynamic Inference coal amount according to load-coal amount expert knowledge library, and constraints is the ability upper and lower bound of coal feeder.
Load-primary air flow specialist system
Heave amplitude according to load automatically determines primary air flow to be added.The experience of operative employee being arranged, form load-primary air flow expert knowledge library, during lifting load, the setting value of input primary air flow, load-primary air flow specialist system carrys out the knots modification of Dynamic Inference primary air flow according to load-primary air flow expert knowledge library.
Load-secondary air flow specialist system
Heave amplitude according to load automatically determines secondary air flow to be added.The experience of operative employee being arranged, form load-secondary air flow expert knowledge library, during lifting load, the setting value of input secondary air flow, load-secondary air flow specialist system carrys out the knots modification of Dynamic Inference secondary air flow according to load-secondary air flow expert knowledge library.
Load prediction control system
Variation tendency Real-time and Dynamic by load and bed temperature judges the deviation of load setting value and current measurement value, is adjusted coal supply, primary air flow and secondary air flow.
Due to the fact that and take above technical scheme, it has the advantage that 1, present invention introduces expert control system, using the experience of operating experience and operative employee as knowledge base, Dynamic Inference coal amount, primary air flow and the knots modification of secondary air flow, reach the purpose of fast lifting load；2, the present invention uses PREDICTIVE CONTROL dynamically to judge the variation tendency of load and bed temperature, prevents load lifting from too fast boiler is caused danger, simultaneously, it is achieved load precisely regulates.
Accompanying drawing explanation
Accompanying drawing is a kind of CFBB fast lifting load control system FB(flow block).
Detailed description of the invention
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings.
The control system of the present invention is as shown in drawings, device A is load setting value setting apparatus, device B1, B2, B3 are load-coal amount expert system control device, load-primary air flow expert system control device, load-secondary air flow expert system control device respectively, device F is load prediction controller, device C1, C2, C3 are Limestone control device, First air controller, secondary wind controller respectively, device D1, D2, D3 are coal-supplying amount executor, First air flow executor and secondary air flow executor respectively, and device E is circulating fluidized bed boiler device.
A is load setting value setting apparatus, its input is the main vapour pressure of boiler that process operator sets, and its outfan is load-coal supply expert system control device B1, load-First air expert system control device B2, load-secondary wind expert system control device B3 and setting value SV of load prediction controller F.
The output that SV end is load setting value setting apparatus A of load-coal amount expert system control device B1, outfan exports the SV2 end of Limestone control device C1.This system uses load-coal amount expert knowledge library Dynamic Inference expert algorithm.
The output that SV end is load setting value setting apparatus A of load-primary air flow expert system control device B2, outfan exports the SV2 end of Primary air flow control device C2.This system uses load-primary air flow expert knowledge library Dynamic Inference expert algorithm.
The output that SV end is load setting value setting apparatus A of load-secondary air flow expert system control device B3, outfan exports the SV2 end of secondary air flow controller C3.This system uses load-secondary air flow expert knowledge library Dynamic Inference expert algorithm.
The measured value that PV1 input is main vapour pressure of load prediction controller F, PV2 input is the measured value of bed temperature, SV input is the output of load setting value setting apparatus A, and outfan OP1, OP2 and OP3 of load prediction controller F connects the SV1 input of Limestone control device C1, the SV1 input of Primary air flow control device C2 and the SV1 input of secondary air flow controller C3 respectively.
The measured value that PV input is coal-supplying amount of Limestone control device C1, SV1 is the output OP1 of load prediction controller F, SV2 is the output of load-coal supply expert system control device B1, SV1 and SV2 sum is as the setting value of coal supply controller C1, the outfan of Limestone control device C1 exports on coal-supplying amount executor D1, and controller uses pid algorithm, and the P value of PID controller is 200-250, the span of I is 80-100, and the span of D is 50-100.
The measured value that PV input is primary air flow of Primary air flow control device C2, SV1 input is the output OP1 of load prediction controller F, SV2 input is the output of load-primary air flow expert system control device B2, SV1 and SV2 sum is as the setting value of Primary air flow control device C2, the outfan of Primary air flow control device C2 exports on primary air flow executor D2, controller uses pid algorithm, the P value of PID controller is 180-200, the span of I is 100-120, and the span of D is 50-80.
The measured value that PV input is secondary air flow of secondary air flow controller C3, SV1 input is the output OP1 of load prediction controller F, SV2 input is the output of load-secondary air flow expert system control device B3, SV1 and SV2 sum is as the setting value of secondary air flow controller C3, the outfan of secondary air flow controller C3 exports on secondary air flow executor D3, and controller uses pid algorithm, and the P value of PID controller is 150-200, the span of I is 60-80, and the span of D is 30-50.
Claims (1)
1. a CFBB fast lifting load control system, it is characterised in that be provided with load-coal amount specialist system, load-primary air flow specialist system, load-secondary air flow specialist system and load prediction control system；
Load-coal amount specialist system
Heave amplitude according to load automatically determines coal amount to be added, the experience of operative employee is arranged, composition load-coal amount expert knowledge library, during lifting load, the setting value of input load, load-coal amount specialist system carrys out the knots modification of Dynamic Inference coal amount according to load-coal amount expert knowledge library, and constraints is the ability upper and lower bound of coal feeder；
Load-primary air flow specialist system
Heave amplitude according to load automatically determines primary air flow to be added, the experience of operative employee is arranged, composition load-primary air flow expert knowledge library, during lifting load, the setting value of input primary air flow, load-primary air flow specialist system carrys out the knots modification of Dynamic Inference primary air flow according to load-primary air flow expert knowledge library；
Load-secondary air flow specialist system
Heave amplitude according to load automatically determines secondary air flow to be added, the experience of operative employee is arranged, composition load-secondary air flow expert knowledge library, during lifting load, the setting value of input secondary air flow, load-secondary air flow specialist system carrys out the knots modification of Dynamic Inference secondary air flow according to load-secondary air flow expert knowledge library；
Load prediction control system
Variation tendency Real-time and Dynamic by load and bed temperature judges the deviation of load setting value and current measurement value, is adjusted coal supply, primary air flow and secondary air flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610395238.8A CN105841145A (en) | 2016-06-07 | 2016-06-07 | Rapid load increase and decrease control system of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610395238.8A CN105841145A (en) | 2016-06-07 | 2016-06-07 | Rapid load increase and decrease control system of circulating fluidized bed boiler |
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| CN105841145A true CN105841145A (en) | 2016-08-10 |
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| CN201610395238.8A Pending CN105841145A (en) | 2016-06-07 | 2016-06-07 | Rapid load increase and decrease control system of circulating fluidized bed boiler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352330A (en) * | 2016-11-25 | 2017-01-25 | 浦北县科学技术开发中心 | Coal feeding control system of coal power generation boiler |
| CN106402854A (en) * | 2016-11-25 | 2017-02-15 | 浦北县科学技术开发中心 | Coal power generating boiler air inlet control system |
| CN111189043A (en) * | 2019-04-09 | 2020-05-22 | 北京和隆优化科技股份有限公司 | Quick and stable oxygen content control system of biomass CFB boiler |
| CN112363554A (en) * | 2020-10-15 | 2021-02-12 | 四川广安发电有限责任公司 | Thermal power generating unit air volume and air pressure decoupling control method |
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| CN111189043A (en) * | 2019-04-09 | 2020-05-22 | 北京和隆优化科技股份有限公司 | Quick and stable oxygen content control system of biomass CFB boiler |
| CN112363554A (en) * | 2020-10-15 | 2021-02-12 | 四川广安发电有限责任公司 | Thermal power generating unit air volume and air pressure decoupling control method |
| CN112363554B (en) * | 2020-10-15 | 2022-02-11 | 四川广安发电有限责任公司 | Thermal power generating unit air volume and air pressure decoupling control method |
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