CN113864812A - Intelligent optimization method and control system for boiler secondary air door - Google Patents
Intelligent optimization method and control system for boiler secondary air door Download PDFInfo
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- CN113864812A CN113864812A CN202111171181.0A CN202111171181A CN113864812A CN 113864812 A CN113864812 A CN 113864812A CN 202111171181 A CN202111171181 A CN 202111171181A CN 113864812 A CN113864812 A CN 113864812A
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- air door
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- swing angle
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005457 optimization Methods 0.000 title claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 238000012423 maintenance Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/002—Regulating air supply or draught using electronic means
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Abstract
The invention provides an intelligent optimization method and a control system for a secondary air door of a boiler, wherein the method comprises the following steps: the PID control system acquires monitoring feedback information, wherein the monitoring feedback information comprises secondary air door position feedback information and boiler burner pendulum angle position feedback information, and the PID control system comprises a PID controller and an I/P controller; the PID controller determines the real-time positions of a secondary air door of the boiler and the swing angle of a burner of the boiler according to the monitoring feedback information; setting a swing angle instruction of a boiler secondary air door and a boiler burner in a DCS, adjusting the positions of the swing angle of the boiler secondary air door and the boiler burner through an I/P controller according to the instruction set in the logic configuration of the DCS and the real-time positions of the swing angles of the boiler secondary air door and the boiler burner, and forming a closed-loop control system by secondary air door position feedback information, boiler burner swing angle position feedback information, a PID controller, the I/P controller and the DCS. The invention thoroughly eliminates the problem of inconsistency of the air door and swing angle instructions with the position feedback information, and ensures the long-period stable and safe operation of the unit.
Description
Technical Field
The invention relates to the technical field of boiler secondary air door adjustment, in particular to an intelligent optimization method and a control system for a boiler secondary air door.
Background
By investigating the conditions of secondary air doors and the swinging angle of a boiler burner of a power generation enterprise in-situ control equipment, during the project construction period of many enterprises, in order to save the project investment cost, the swing angle control of the secondary air door of the boiler and the combustor of the boiler selects a cheap non-intelligent I/P controller to control the swing angle of the air door and the combustor of the boiler, because the control mode is that the control instruction and the feedback signal are respectively and independently configured, the control schematic diagram is shown in figure 1 and belongs to open loop control, the deviation between the control signal and the feedback signal is large and exceeds the requirement of 3 percent of the regulation, when the same command signal is used for controlling the swing angles of the air doors and the boiler burner on the same layer, the feedback difference of the positions of the air doors exceeds 10%, and the four swing angles are not at the same horizontal position, so that operators cannot accurately judge the opening degrees and the swing angle positions of the air doors, and the air distribution accuracy and the superheated steam temperature control accuracy of the boiler are seriously influenced.
Disclosure of Invention
The invention provides an intelligent optimization method and a control system for a boiler secondary air door, which realize intelligent closed-loop control of the air door and the swing angle by combining an I/P controller, air door feedback, swing angle feedback and DCS control logic, and thoroughly solve the problem of inconsistent instructions and position feedback of the air door and the swing angle.
The technical scheme of the invention is as follows: an intelligent optimization method for a boiler secondary air door comprises the following steps:
the PID control system acquires monitoring feedback information, wherein the monitoring feedback information comprises secondary air door position feedback information and boiler burner pendulum angle position feedback information, and the PID control system comprises a PID controller and an I/P controller;
the PID controller determines the real-time positions of a secondary air door of the boiler and the swing angle of a burner of the boiler according to the monitoring feedback information;
setting a swing angle instruction of a boiler secondary air door and a boiler burner in a DCS, adjusting the positions of the swing angle of the boiler secondary air door and the boiler burner through an I/P controller according to the instruction set in the logic configuration of the DCS and the real-time positions of the swing angles of the boiler secondary air door and the boiler burner, and forming a closed-loop control system by secondary air door position feedback information, boiler burner swing angle position feedback information, a PID controller, the I/P controller and the DCS.
Preferably, the parameter setting in the PID controller is set to PI (proportional integral) mode, and the parameter setting is based on the principle that the damper and the swing angle do not oscillate.
Preferably, a deviation alarm value is set in the DCS, an alarm is given when the deviation of the set instruction and the position feedback information reaches the deviation alarm value, the deviation alarm value is 3%, an alarm signal is sent when the deviation value is larger than 3%, an alarm is given when the air door or the swing angle is jammed, the fault information is reminded to run staff, and the maintenance and the processing are timely contacted.
Preferably, a plurality of single-loop PID control systems are arranged in the DCS of the unit set, each secondary air door and the swing angle of the boiler burner correspond to one single-loop PID control system, and manual and automatic undisturbed switching can be achieved.
Preferably, the PID control system acquires the monitoring feedback information from the DCS system.
The invention also provides an intelligent control system for the secondary air door of the boiler, which comprises a DCS system and a plurality of single-loop PID control systems, wherein each single-loop PID control system is independently connected with the secondary air door or the swing angle of the boiler burner.
Preferably, the DCS is connected with a plurality of secondary air door position sensors and a boiler burner swing angle position sensor, and the secondary air door position and the boiler burner swing angle position are monitored in real time.
Preferably, the single-loop PID control system includes a PID controller, an I/P controller, a secondary air door or a tilt angle of the boiler burner, the PID controller, the I/P controller, the secondary air door or the tilt angle of the boiler burner form a closed loop, the PID controller obtains information of the tilt angle position of the secondary air door or the boiler burner from the DCS system, processes and analyzes the information, and adjusts the tilt angle position of the secondary air door or the boiler burner through the I/P controller.
The invention has the advantages that:
the intelligent optimization of the secondary air door and the swing angle control of the boiler burner is realized in the DCS, the intelligent closed-loop control of the air door and the swing angle is realized, the reliability and the maintainability of the swing angle control of the secondary air door and the boiler burner are improved, the workload of maintenance personnel is reduced, the control effect of an intelligent positioner is achieved or exceeded, and no cost is required for the optimization;
by optimization, the invention avoids the transformation and transformation of the secondary air door and the intelligent positioner for the swing angle of the boiler burner, saves the cost, solves the problem of inaccurate control of an I/P controller in the thermal power industry, and ensures the long-period stable and safe operation of the unit.
Drawings
FIG. 1 is a schematic diagram of a prior art control of a secondary air door of a boiler;
FIG. 2 is a schematic diagram of an intelligent control system for a secondary air door of a boiler according to the present invention.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which a person skilled in the art can, without any creative effort, fully implement the present invention.
As shown in fig. 2, the embodiment of the present invention is: an intelligent optimization method for a boiler secondary air door comprises the following steps:
the PID control system acquires monitoring feedback information, wherein the monitoring feedback information comprises secondary air door position feedback information and boiler burner pendulum angle position feedback information, and the PID control system comprises a PID controller and an I/P controller;
the PID controller determines the real-time positions of a secondary air door of the boiler and the swing angle of a burner of the boiler according to the monitoring feedback information;
setting a swing angle instruction of a boiler secondary air door and a boiler burner in a DCS, adjusting the positions of the swing angle of the boiler secondary air door and the boiler burner through an I/P controller according to the instruction set in the logic configuration of the DCS and the real-time positions of the swing angles of the boiler secondary air door and the boiler burner, forming a closed-loop control system by secondary air door position feedback information, boiler burner swing angle position feedback information, a PID controller, the I/P controller and the DCS, and realizing the consistency of the instruction and the position feedback information.
Preferably, the parameter setting in the PID controller is set to PI (proportional integral) mode, and the parameter setting is based on the principle that the damper and the swing angle do not oscillate.
Preferably, a deviation alarm value is set in the DCS, an alarm is given when the deviation of the set instruction and the position feedback information reaches the deviation alarm value, the deviation alarm value is 3%, an alarm signal is sent when the deviation value is larger than 3%, an alarm is given when the air door or the swing angle is jammed, the fault information is reminded to run staff, and the maintenance and the processing are timely contacted.
Preferably, a plurality of single-loop PID control systems are arranged in the DCS of the unit set, each secondary air door and the swing angle of the boiler burner correspond to one single-loop PID control system, and manual and automatic undisturbed switching can be achieved.
Preferably, the PID control system acquires the monitoring feedback information from the DCS system.
The invention also provides an intelligent control system for the secondary air door of the boiler, which comprises a DCS system and a plurality of single-loop PID control systems, wherein each single-loop PID control system is independently connected with the secondary air door or the swing angle of the boiler burner.
Preferably, the DCS is connected with a plurality of secondary air door position sensors and a boiler burner swing angle position sensor, and the secondary air door position and the boiler burner swing angle position are monitored in real time.
Preferably, the single-loop PID control system includes a PID controller, an I/P controller, a secondary air door or a tilt angle of the boiler burner, the PID controller, the I/P controller, the secondary air door or the tilt angle of the boiler burner form a closed loop, the PID controller obtains information of the tilt angle position of the secondary air door or the boiler burner from the DCS system, processes and analyzes the information, and adjusts the tilt angle position of the secondary air door or the boiler burner through the I/P controller.
According to the invention, the I/P controller, the air door feedback, the swing angle feedback and the DCS control logic are combined, so that the intelligent closed-loop control of the air door and the swing angle is realized, and the problem that the instructions of the air door and the swing angle are inconsistent with the position feedback is thoroughly solved.
While the preferred embodiments of the invention have been described, it is to be understood that the invention is not limited to the precise embodiments described, and that equipment and structures not described in detail are understood to be practiced as commonly known in the art; any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention by those skilled in the art can be made without departing from the technical scope of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. The intelligent optimization method for the secondary air door of the boiler is characterized by comprising the following steps of:
the PID control system acquires monitoring feedback information, wherein the monitoring feedback information comprises secondary air door position feedback information and boiler burner pendulum angle position feedback information, and the PID control system comprises a PID controller and an I/P controller;
the PID controller determines the real-time positions of a secondary air door of the boiler and the swing angle of a burner of the boiler according to the monitoring feedback information;
setting a swing angle instruction of a boiler secondary air door and a boiler burner in a DCS, adjusting the positions of the swing angle of the boiler secondary air door and the boiler burner through an I/P controller according to the instruction set in the logic configuration of the DCS and the real-time positions of the swing angles of the boiler secondary air door and the boiler burner, and forming a closed-loop control system by secondary air door position feedback information, boiler burner swing angle position feedback information, a PID controller, the I/P controller and the DCS.
2. The intelligent optimization method for the boiler secondary air door according to claim 1, wherein the parameter setting in the PID controller is set to be in a PI mode, and the parameter setting is based on the principle that the air door and the swing angle do not oscillate.
3. The intelligent optimization method for the boiler secondary air door according to claim 2, wherein a deviation alarm value is set in the DCS, an alarm is given when the deviation of the set instruction and the position feedback information reaches the deviation alarm value, the deviation alarm value is 3%, an alarm signal is given when the deviation value is larger than 3%, an air door or swing angle jamming fault alarm is given, operation personnel is reminded of fault information, and maintenance processing is timely contacted.
4. The intelligent optimization method for the boiler secondary air door according to claim 3, characterized in that a plurality of single-loop PID control systems are arranged in the DCS system of the unit set, and each secondary air door and the boiler burner swing angle correspond to one single-loop PID control system, so that manual and automatic undisturbed switching can be realized.
5. The intelligent optimization method for the boiler secondary air door according to claim 4, wherein the PID control system obtains the monitoring feedback information from the DCS system.
6. The utility model provides a boiler secondary air door intelligence control system, its characterized in that includes DCS system, a plurality of single-circuit PID control system, every single-circuit PID control system is connected with secondary air door or boiler combustor pivot angle alone.
7. The intelligent optimization method for the boiler secondary air door according to claim 6, wherein a plurality of secondary air door position sensors and boiler burner swing angle position sensors are connected to the DCS system, and the secondary air door position and the boiler burner swing angle position are monitored in real time.
8. The intelligent optimization method for the boiler secondary air door according to claim 7, wherein the single-loop PID control system comprises a PID controller, an I/P controller, a secondary air door or a boiler burner swing angle, the PID controller, the I/P controller, the secondary air door or the boiler burner swing angle form a closed loop, the PID controller obtains the information of the swing angle position of the secondary air door or the boiler burner from a DCS system, processes and analyzes the information, and the swing angle position of the secondary air door or the boiler burner is adjusted through the I/P controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111171181.0A CN113864812A (en) | 2021-10-08 | 2021-10-08 | Intelligent optimization method and control system for boiler secondary air door |
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| CN202111171181.0A CN113864812A (en) | 2021-10-08 | 2021-10-08 | Intelligent optimization method and control system for boiler secondary air door |
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| CN2711539Y (en) * | 2003-07-16 | 2005-07-20 | 北京和利时系统工程股份有限公司 | Automatic combustion adjusting system for circulating fluidized bed boiler |
| CN201476047U (en) * | 2009-08-21 | 2010-05-19 | 北京岳能科技有限公司 | Control device of boiler quadric ventilation door |
| CN101788809A (en) * | 2009-08-17 | 2010-07-28 | 杭州和利时自动化有限公司 | Coordinated control system (CCS) of large-size circulating fluidized bed boiler (CFBB) unit |
| CN104075340A (en) * | 2014-07-17 | 2014-10-01 | 烟台龙源电力技术股份有限公司 | Low-nitrogen combustion control method and system based on PLC |
| CN107152695A (en) * | 2017-05-23 | 2017-09-12 | 合肥瑞石测控工程技术有限公司 | The heating furnace visualization combustion control system and control method detected based on many reference amounts |
| CN107355812A (en) * | 2017-06-12 | 2017-11-17 | 黄秀霞 | A kind of Boiler Combustion Optimization System |
| CN110500595A (en) * | 2019-07-17 | 2019-11-26 | 光大常高新环保能源(常州)有限公司 | A method of suitable for Martin furnace waste incineration air distribution |
| US20200175435A1 (en) * | 2018-11-30 | 2020-06-04 | Doosan Heavy Industries & Construction Co., Ltd. | System and method for optimizing combustion of boiler |
| CN112555896A (en) * | 2020-12-14 | 2021-03-26 | 国家能源菏泽发电有限公司 | Intelligent analysis system and method for boiler combustion efficiency of thermal power plant |
| CN112628712A (en) * | 2021-01-11 | 2021-04-09 | 大唐黄岛发电有限责任公司 | Secondary air closed-loop optimization control system based on air door resistance coefficient |
-
2021
- 2021-10-08 CN CN202111171181.0A patent/CN113864812A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2711539Y (en) * | 2003-07-16 | 2005-07-20 | 北京和利时系统工程股份有限公司 | Automatic combustion adjusting system for circulating fluidized bed boiler |
| CN101788809A (en) * | 2009-08-17 | 2010-07-28 | 杭州和利时自动化有限公司 | Coordinated control system (CCS) of large-size circulating fluidized bed boiler (CFBB) unit |
| CN201476047U (en) * | 2009-08-21 | 2010-05-19 | 北京岳能科技有限公司 | Control device of boiler quadric ventilation door |
| CN104075340A (en) * | 2014-07-17 | 2014-10-01 | 烟台龙源电力技术股份有限公司 | Low-nitrogen combustion control method and system based on PLC |
| CN107152695A (en) * | 2017-05-23 | 2017-09-12 | 合肥瑞石测控工程技术有限公司 | The heating furnace visualization combustion control system and control method detected based on many reference amounts |
| CN107355812A (en) * | 2017-06-12 | 2017-11-17 | 黄秀霞 | A kind of Boiler Combustion Optimization System |
| US20200175435A1 (en) * | 2018-11-30 | 2020-06-04 | Doosan Heavy Industries & Construction Co., Ltd. | System and method for optimizing combustion of boiler |
| CN110500595A (en) * | 2019-07-17 | 2019-11-26 | 光大常高新环保能源(常州)有限公司 | A method of suitable for Martin furnace waste incineration air distribution |
| CN112555896A (en) * | 2020-12-14 | 2021-03-26 | 国家能源菏泽发电有限公司 | Intelligent analysis system and method for boiler combustion efficiency of thermal power plant |
| CN112628712A (en) * | 2021-01-11 | 2021-04-09 | 大唐黄岛发电有限责任公司 | Secondary air closed-loop optimization control system based on air door resistance coefficient |
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