CN109114586A - A kind of secondary air register control system and method - Google Patents
A kind of secondary air register control system and method Download PDFInfo
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- CN109114586A CN109114586A CN201810074067.8A CN201810074067A CN109114586A CN 109114586 A CN109114586 A CN 109114586A CN 201810074067 A CN201810074067 A CN 201810074067A CN 109114586 A CN109114586 A CN 109114586A
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- Prior art keywords
- controller
- actuator
- secondary air
- potentiometer
- input
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 4
- 239000012720 thermal barrier coating Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 14
- 238000009434 installation Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000006467 substitution reaction Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L13/00—Construction of valves or dampers for controlling air supply or draught
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2237/00—Controlling
- F23N2237/16—Controlling secondary air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Programmable Controllers (AREA)
Abstract
The invention discloses a kind of secondary air register control system and method, the system comprises: programmable controller, controller and actuator；Wherein, the controller is independently of the programmable controller and the actuator；It include input measurement device and output-controlling device in the programmable controller, the input measurement device and the output-controlling device are electrically connected with the controller respectively；The actuator includes potentiometer and motor, and the potentiometer and the motor are electrically connected with the controller respectively.In above system, the controller of secondary air register is independently of other equipment such as actuators, so as to which only controller part is replaced, and the other parts installation site for retaining secondary air register control system is constant, efficiently solve the problems, such as that controller stops production, can not restore in time without equipment caused by new products substitution, reduce maintenance cost simultaneously, improves repair and maintenance efficiency.
Description
The technical field is as follows:
the invention relates to the technical field of boiler optimization control combustion, in particular to a secondary air door control system and a secondary air door control method.
Background art:
the secondary air door (or called small air door) of the boiler of the thermal power plant is an important subsystem for combustion control, and is used for combustion assistance, control of the generation of low nitrogen oxides (NOx) and the like. The secondary air door electric controller and the executing device are mostly integrally installed on the furnace wall of the boiler, and the circuit board of the controller is also partially transformed into a special control cabinet.
In the process of implementing the invention, the inventor finds that as the service life increases, the circuit board of the controller gradually ages, and the controller of the secondary air door is always in a high-temperature state, so that the damage frequency is increased, and the failure rate of the controller is higher. Meanwhile, most installation positions of the secondary air door electric controller and the executing device are too narrow, the replacement is very inconvenient during overhead operation, and in addition, the problems of production halt of the existing controller, no replacement of new products and the like are solved, so that great challenges are brought to the overhaul and maintenance work of the controller.
The invention content is as follows:
the present invention is directed to a secondary damper control system and method for solving the above-mentioned problems of the prior art.
The invention is implemented by the following technical scheme:
the embodiment of the invention provides a secondary air door control system, which comprises:
a programmable controller, a controller and an actuator; wherein the controller is independent of the programmable controller and the actuator; the programmable controller comprises an input measuring device and an output control device, and the input measuring device and the output control device are respectively and electrically connected with the controller; the actuator comprises a potentiometer and a motor, and the potentiometer and the motor are respectively electrically connected with the controller.
Further, the controller comprises an input loop and a feedback loop, the output control device is electrically connected with the input loop, and the potentiometer is electrically connected with the feedback loop.
Further, the controller further comprises an output circuit, and the input measuring device is electrically connected with the output circuit.
Further, the potentiometer is disposed inside or outside the actuator.
Further, the movable metal contact of the potentiometer is connected with the secondary air door.
Further, the controller includes an overload protection device connected to the power source.
Further, the shell of the controller adopts a full-sealing structure, and the controller adopts a heat-insulating coating inner decoration.
Further, a display device is arranged outside the controller.
The embodiment of the invention provides a secondary air door control method, which is applied to a controller and comprises the following steps:
receiving an instruction from a programmable controller, and processing the instruction through an input loop to form an input signal, wherein the controller and the programmable controller are mutually independent; receiving a position signal sent by a potentiometer arranged in an actuator, processing the position signal through a feedback loop and converting the position signal into a feedback signal, wherein the controller is independent from the actuator; and comparing the input signal with the feedback signal, and generating a position control instruction for the secondary air door according to a comparison result.
Further, the method further comprises: and the motor in the actuator controls the opening and closing degree of the secondary air door through the position control command.
The invention has the advantages that:
according to the secondary air door control system and method provided by the embodiment of the invention, the controller of the secondary air door is independent of other equipment such as an actuator, so that only part of the controller can be replaced, and the mounting positions of other parts of the secondary air door control system are kept unchanged, the problem that the equipment cannot be recovered in time due to production halt of the controller and no new product replacement is solved, meanwhile, the maintenance cost is reduced, and the overhaul and maintenance efficiency is improved.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a secondary damper control system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for controlling a secondary damper according to an embodiment of the present invention.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The technical solution of the embodiment of the present invention is described in detail below.
Fig. 1 is a schematic structural diagram of a secondary damper control system according to an embodiment of the present invention. As shown in fig. 1, a secondary damper control system according to an embodiment of the present invention includes:
programmable controller 10, controller 20, and actuator 30; wherein the controller 20 is independent of the programmable controller 10 and the actuator 30; the programmable controller 10 comprises an input measuring device 110 and an output control device 120, wherein the input measuring device 110 and the output control device 120 are respectively electrically connected with the controller 20; the actuator 30 includes a potentiometer 310 and a motor 320, and the potentiometer 310 and the motor 320 are electrically connected to the controller 20, respectively.
In the embodiment of the present invention, because the controller 20 is independent from the programmable controller 10 and the actuator 30, when the controller 20 fails, only the controller 20 needs to be replaced, the installation positions of the programmable controller 10 and the actuator 30 are kept unchanged, and the wiring mode of the newly replaced controller 20 electrically connected with each device in the programmable controller 10 and the actuator 30 is kept unchanged, so that the maintenance workload is minimized, and the maintenance workload and the installation cost are reduced to the maximum extent.
Specifically, the programmable controller 10 obtains the opening/closing degree instruction of the corresponding secondary air door in the preset low-nitrogen combustion control model according to the boiler operation parameters fed back by the distributed system, where the boiler operation parameters may include load, coal quality, primary air volume, total air volume, boiler efficiency, and the like, and the distributed system may feed back at predetermined time intervals or in real time, and the embodiment of the present invention is not limited herein. The input measuring device 110 and the output control device 120 are used for realizing the transmission of signals between the programmable controller 10 and the controller 20. The resistance value of the potentiometer 310 changes with the change of the position of the secondary air door, so that the position signal of the secondary air door can be obtained through the resistance value of the potentiometer 310. The controller 20 is configured to process the opening/closing degree command and the position signal to obtain a comparison result, and control the actuator 30 according to the comparison result, that is, control the opening/closing degree of the secondary damper through the motor 320 in the actuator 30.
Optionally, the controller 20 includes an input loop to which the output control device 120 is electrically connected and a feedback loop to which the potentiometer 310 is electrically connected.
The input circuit may process the secondary damper opening and closing degree command to form an input signal recognizable by the controller 20. The feedback loop may process the secondary damper position signal for conversion to a feedback signal recognizable by the controller 20. The controller 20 compares the input signal with the feedback signal, generates a position control instruction for the secondary air door according to the positive and negative deviations, and the motor 320 in the actuator 30 controls the opening and closing degree of the secondary air door according to the position control instruction, so as to ensure that the actuator is accurately positioned to any instruction position, thereby realizing the accurate positioning of the opening and closing position of the secondary air door.
Optionally, the controller 20 further includes an output circuit to which the input measurement device 110 is electrically connected.
The controller 20 may also process the position control command through the output loop to form an output signal recognizable by the programmable controller 10, and transmit the output signal to the programmable controller 10 through the input measuring device 110, and the programmable controller 10 can determine the precise position of the current secondary damper according to the output signal, and when the precise position is in the allowable error range with the position corresponding to the opening and closing degree command of the secondary damper sent before, it indicates that the opening and closing degree of the current secondary damper is in accordance with the expectation, and no correction is needed.
Alternatively, the potentiometer 310 may be disposed in the actuator 30, or may be disposed outside the actuator 30, and the embodiment of the present invention is not limited herein. The movable metal contact of the potentiometer 310 is connected with the secondary air door, specifically, when the potentiometer 310 is disposed on the outer side of the actuator 20, the potentiometer is fixed on the outer side of the actuator 30 through a connecting bracket, and the movable metal contact thereof is connected with the secondary air door through a connecting rod, so that the resistance value of the potentiometer 310 can be changed along with the change of the position of the secondary air door.
Optionally, the controller 20 further comprises an overload protection device connected to the power supply. When the controller 20 determines that the secondary air door is stuck at present according to the processed feedback signal, the overload protection device can be automatically started, so that the power supply is automatically cut off, and the operation risk is greatly reduced.
Optionally, a display device is provided externally to the controller 20. Namely, the controller 20 is externally provided with a liquid crystal display screen and a fault code display function, so that the operator can clearly know the current operation condition through the display device, and the working efficiency is improved.
In addition, the display device facilitates more convenient positioning operation of the newly replaced controller. Specifically, pressing an A/M key in the display device for exceeding a preset time to enter a setting menu, pressing the A/M key for confirmation when U5 is-oh-, pressing the key to adjust the valve to be fully closed when the display panel displays U6, pressing the upper key to return to a point, pressing the A/M key for confirmation, and then completing the positioning of the closed position; when the display panel displays U7, when the upper key is pressed to adjust the valve to be fully opened, the key is pressed back a little, the A/M key is pressed for confirmation, and the positioning of the open position is completed. The whole process can be completed by only one worker, and the labor intensity of overhaul and maintenance personnel is reduced.
Optionally, the housing of the controller adopts a full-sealing structure, and the controller adopts a thermal insulation coating inner decoration. Because the controller part adopts full seal structure, but heat preservation degree and dust can not get into inside the controller, have reduced the high problem of fault rate. Meanwhile, the heat insulation coating can efficiently insulate heat, prevent fire and flame, insulate pressure, insulate sound and protect environment, thereby prolonging the service life of the controller.
The embodiment of the invention provides a secondary air door control system, which comprises: a programmable controller, a controller and an actuator; wherein the controller is independent of the programmable controller and the actuator; the programmable controller comprises an input measuring device and an output control device, and the input measuring device and the output control device are respectively and electrically connected with the controller; the actuator comprises a potentiometer and a motor, and the potentiometer and the motor are respectively electrically connected with the controller. In the system, the controller of the secondary air door is independent of other devices such as an actuator, so that only the controller part can be replaced, the mounting positions of other parts of the secondary air door control system are kept unchanged, the problem that the devices cannot be recovered in time due to production halt of the controller and no new product replacement is solved, the maintenance cost is reduced, and the overhauling and maintenance efficiency is improved.
FIG. 2 is a flow chart of a secondary damper control method according to an embodiment of the present invention. As shown in fig. 2, the secondary damper control method provided in the embodiment of the present invention is applied to a controller, and includes:
s201, receiving an instruction from a programmable controller, and processing the instruction through an input loop to form an input signal, wherein the controller and the programmable controller are independent.
The programmable controller obtains a corresponding opening and closing degree instruction of the secondary air door in a preset low-nitrogen combustion control model according to boiler operation parameters fed back by the distributed system, wherein the boiler operation parameters may include load, coal quality, primary air volume, total air volume, boiler efficiency and the like, the distributed system may feed back at intervals of a preset time interval or in real time, and the embodiment of the invention is not limited herein. And the controller receives the opening and closing degree instruction of the secondary air door, and processes the instruction by using an input loop in the controller to form an input signal which can be identified by the controller.
S202, receiving a position signal sent by a potentiometer arranged in the actuator, processing the position signal through a feedback loop and converting the position signal into a feedback signal, wherein the controller is independent from the actuator.
The resistance value of the potentiometer can be changed along with the change of the position of the secondary air door, so that the position signal of the secondary air door can be obtained through the resistance value of the potentiometer. The controller receives a position signal sent by a potentiometer arranged in the actuator, processes the position signal through a feedback loop, and converts the position signal into a feedback signal.
It should be noted that the controller is independent from the programmable controller and the actuator, when the controller fails, the controller is only required to be replaced, the installation positions of the programmable controller and the actuator are kept unchanged, and the wiring mode of the newly replaced controller, the programmable controller and the actuator, which are electrically connected with each device, is kept unchanged, so that the maintenance workload is minimized, and the maintenance workload and the installation cost are reduced to the maximum extent.
And S203, comparing the input signal with the feedback signal, and generating a position control instruction for the secondary air door according to the comparison result.
Specifically, the input signal and the feedback signal can be compared by a Central Processing Unit (CPU) in the controller, a position control instruction for the secondary air door is generated according to a deviation between the input signal and the feedback signal, the opening and closing degree of the actuator is controlled, and the actuator is accurately positioned to any instruction position, so that the accurate positioning of the position is realized.
Optionally, after step S203, the method further comprises: and the motor in the actuator controls the opening and closing degree of the secondary air door through the position control command.
Specifically, the controller transmits the position control instruction to the motor of the actuator, and the motor controls the opening and closing degree of the secondary air door according to the position control instruction, so that the actuator is accurately positioned to any instruction position, and the accurate positioning of the opening and closing position of the secondary air door is realized.
The embodiment of the invention provides a secondary air door control method, which comprises the following steps: receiving an instruction from a programmable controller, and processing the instruction through an input loop to form an input signal, wherein the controller and the programmable controller are mutually independent; receiving a position signal sent by a potentiometer arranged in an actuator, processing the position signal through a feedback loop and converting the position signal into a feedback signal, wherein the controller is independent from the actuator; and comparing the input signal with the feedback signal, and generating a position control instruction for the secondary air door according to a comparison result. Because the controller of the secondary air door is independent of other devices such as an actuator, the controller part can be replaced only, and the mounting positions of other parts of the secondary air door control system are kept unchanged, so that the problem that the devices cannot be recovered in time due to production halt of the controller and no new product replacement is solved, the maintenance cost is reduced, and the overhauling and maintenance efficiency is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A secondary damper control system, comprising:
a programmable controller, a controller and an actuator; wherein,
the controller is independent of the programmable controller and the actuator;
the programmable controller comprises an input measuring device and an output control device, and the input measuring device and the output control device are respectively and electrically connected with the controller;
the actuator comprises a potentiometer and a motor, and the potentiometer and the motor are respectively electrically connected with the controller.
2. The system of claim 1, wherein the controller comprises an input loop and a feedback loop, the output control device being electrically connected to the input loop, and the potentiometer being electrically connected to the feedback loop.
3. The system of claim 2, wherein the controller further comprises an output circuit, the input measurement device being electrically connected to the output circuit.
4. A system according to any of claims 1-3, wherein the potentiometer is arranged inside or outside the actuator.
5. The system of claim 4, wherein the moving metal contact of the potentiometer is connected to the secondary damper.
6. A system according to any of claims 1 to 3, wherein the controller comprises an overload protection device, the overload protection device being connected to the power supply.
7. The system of any of claims 1-3, wherein the housing of the controller is a fully sealed structure and the controller is an interior trim of a thermal barrier coating.
8. A system according to any of claims 1-3, wherein a display device is provided externally to the controller.
9. A secondary air door control method is applied to a controller and is characterized by comprising the following steps:
receiving an instruction from a programmable controller, and processing the instruction through an input loop to form an input signal, wherein the controller and the programmable controller are mutually independent;
receiving a position signal sent by a potentiometer arranged in an actuator, processing the position signal through a feedback loop and converting the position signal into a feedback signal, wherein the controller is independent from the actuator;
and comparing the input signal with the feedback signal, and generating a position control instruction for the secondary air door according to a comparison result.
10. The method of claim 9, further comprising:
and the motor in the actuator controls the opening and closing degree of the secondary air door through the position control command.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810074067.8A CN109114586A (en) | 2018-01-25 | 2018-01-25 | A kind of secondary air register control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810074067.8A CN109114586A (en) | 2018-01-25 | 2018-01-25 | A kind of secondary air register control system and method |
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| Publication Number | Publication Date |
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| CN109114586A true CN109114586A (en) | 2019-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810074067.8A Pending CN109114586A (en) | 2018-01-25 | 2018-01-25 | A kind of secondary air register control system and method |
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| CN (1) | CN109114586A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200329946Y1 (en) * | 2003-07-07 | 2003-10-17 | 김유현 | Device for air efficiently of a 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 |
| CN202511320U (en) * | 2012-03-17 | 2012-10-31 | 鞍钢集团矿业公司 | State control device for fan air door openness actuator |
| 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 |
| CN206903464U (en) * | 2017-05-26 | 2018-01-19 | 胡宗镇 | Sense automatic vertical hinged door shutter door machine |
| CN207815375U (en) * | 2018-01-25 | 2018-09-04 | 内蒙古大唐国际托克托发电有限责任公司 | A kind of secondary air register control system |
-
2018
- 2018-01-25 CN CN201810074067.8A patent/CN109114586A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200329946Y1 (en) * | 2003-07-07 | 2003-10-17 | 김유현 | Device for air efficiently of a 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 |
| CN202511320U (en) * | 2012-03-17 | 2012-10-31 | 鞍钢集团矿业公司 | State control device for fan air door openness actuator |
| 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 |
| CN206903464U (en) * | 2017-05-26 | 2018-01-19 | 胡宗镇 | Sense automatic vertical hinged door shutter door machine |
| CN207815375U (en) * | 2018-01-25 | 2018-09-04 | 内蒙古大唐国际托克托发电有限责任公司 | A kind of secondary air register control system |
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Application publication date: 20190101 |