CN104848250B - A kind of primary air pressure desired value intelligence control system and method - Google Patents
A kind of primary air pressure desired value intelligence control system and method Download PDFInfo
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- CN104848250B CN104848250B CN201510184808.4A CN201510184808A CN104848250B CN 104848250 B CN104848250 B CN 104848250B CN 201510184808 A CN201510184808 A CN 201510184808A CN 104848250 B CN104848250 B CN 104848250B
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- air pressure
- primary air
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Abstract
The invention discloses a kind of primary air pressure desired value intelligence control system and method, including the first control logic module, the second Logic control module, controller, adder and acquisition module for gathering the AGC instructions that electric energy management system sends；The outfan of the acquisition module is connected with the input of the second Logic control module, the outfan of the second Logic control module is connected with the input of adder with the outfan of the first control logic module, the outfan of adder is connected with the input of controller, and the outfan of controller is connected with the control end of hot-air damper in an air channel.The present invention can be effectively reduced the power consumption of First air.
Description
Technical field
The invention belongs to field of thermal power, is related to a kind of primary air pressure desired value intelligence control system and method.
Background technology
For the boiler of unit pulverized-coal system, in order to improve the load responding speed of application of load process, the heat of coal pulverizer
Generally in half-open (40-60 °) state in windshield plate actual motion, so that, during application of load, hot-air damper aperture continues to increase
When, primary air flow has flow to respond, and meets load responding speed.As hot-air damper is in half-open position, exist significantly
Restriction loss (1.0-2.0kpa), when boiler load is in steady statue, this restriction loss is loss, increased primary air fan
Power consumption.How to solve the contradiction between hot-air damper restriction loss and boiler load responding ability is to reduce the pass of First air power consumption
Key.
Content of the invention
It is an object of the invention to overcoming the shortcoming of above-mentioned prior art, there is provided a kind of primary air pressure desired value is intelligently controlled
System and method processed, the system and method can be effectively reduced the power consumption of First air.
For reaching above-mentioned purpose, primary air pressure desired value intelligence control system of the present invention includes controller, addition
Device, for producing the first control logic module of the preset value of benchmark primary air pressure, for producing the default of additional primary air pressure
Second Logic control module of value and the acquisition module for gathering the AGC instructions that electric energy management system sends.
Primary air pressure desired value intelligent control method of the present invention is comprised the following steps：
1) when the change of generating set load is in preset range, the first control logic module produces benchmark primary air pressure
Preset value, the second Logic control module is output as " 0 ", and controller is according to the preset value of the benchmark primary air pressure by control
In air channel, the aperture of hot-air damper is adjusting the primary air pressure size entered in boiler；
When generating set load change not in preset range when, acquisition module obtains the AGC that sends of electric energy management system
Instruction, the AGC instructions that acquisition module collection electric energy management system sends, and AGC instructions are forwarded to the second logic control
In module, the second Logic control module produces the preset value of additional primary air pressure；First control logic module produces benchmark simultaneously
The preset value of primary air pressure, the preset value of the additional primary air pressure are added by adder with the preset value of benchmark primary air pressure
Afterwards, the preset value of actual primary air pressure is obtained, and controller is according to the set-point of the actual primary air pressure by controlling an air channel
The aperture of middle hot-air damper is adjusting the primary air pressure size entered in boiler.
The invention has the advantages that：
In the course of the work, generating set is steady for primary air pressure desired value intelligence control system of the present invention and method
When constant load is moved, the preset value of primary air pressure on the basis of the preset value of actual primary air pressure, the now hot blast in an air channel
Baffle opening standard-sized sheet, at utmost reduces hot-air damper restriction loss, when the change of generating set load is not in preset range
When, the preset value of actual primary air pressure is the knot that the preset value of additional primary air pressure is added with the preset value of benchmark primary air pressure
Really, so as to quickly increase actual primary air pressure, the coal dust amount entered in boiler is improved, meeting coal amount increases the need to primary air flow
Ask, the adverse effect that brings after offsetting hot-air damper standard-sized sheet can be effectively reduced the power consumption of First air.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Wherein, 1 be acquisition module, 2 be the second Logic control module, 3 be the first control logic module, 4 be adder, 5
For controller.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail：
With reference to Fig. 1, this law primary air pressure desired value intelligence control system of the present invention includes controller 5, adder
First control logic module 3 of the preset value for the 4th, being used for producing benchmark primary air pressure, for producing the default of additional primary air pressure
Second Logic control module 2 of value and the acquisition module 1 for gathering the AGC instructions that electric energy management system sends；Described adopt
Collection module 1 outfan be connected with the input of the second Logic control module 2, the outfan of the second Logic control module 2 and
The outfan of the first control logic module 3 is connected with the input of adder 4, and the outfan of adder 4 is defeated with controller 5
Enter end to be connected, the outfan of controller 5 is connected with the control end of hot-air damper in an air channel.
Primary air pressure desired value intelligent control method of the present invention is comprised the following steps：
1) when the change of generating set load is in preset range, the first control logic module 3 produces benchmark First air
The preset value of pressure, the second Logic control module 2 are output as " 0 ", and controller 5 passes through according to the preset value of the benchmark primary air pressure
In air channel of control, the aperture of hot-air damper is adjusting the primary air pressure size entered in boiler；
When generating set load change not in preset range when, acquisition module 1 obtains the AGC that sends of electric energy management system
Instruction, the AGC instructions that the collection electric energy management system of acquisition module 1 sends, and AGC instructions are forwarded to the second logic control
In module 2, the second Logic control module 2 produces the preset value of additional primary air pressure；First control logic module 3 produces base simultaneously
The preset value of quasi- primary air pressure, the preset value of the additional primary air pressure pass through adder 4 with the preset value of benchmark primary air pressure
After addition, the preset value of actual primary air pressure is obtained, and controller 5 is according to the set-point of the actual primary air pressure by controlling once
In air channel, the aperture of hot-air damper is adjusting the primary air pressure size entered in boiler.
During generating set load is pressurized, benchmark primary air pressure constitutes varying duty with additional primary air pressure sum
During actual primary air pressure, when generating set is run in steady load, only benchmark primary air pressure works, this intermittent fever
Windshield plate aperture is close to standard-sized sheet, at utmost reduces hot-air damper restriction loss.By suitably reducing Dynamic Separation in application of load
Device rotating speed, is exerted oneself with quickly improving pulverized coal preparation system, and the short time meets demand of the load responding of boiler to entrance stove internal combustion doses.
During varying duty, by the logic optimization of dynamic separator rotating speed, entrance can be quickly improved in the starting stage
The fuel quantity of boiler, by additional primary air pressure function so that primary air flow can be improved rapidly, meeting coal amount increases to once
The demand of air quantity, the adverse effect that brings after offsetting hot-air damper standard-sized sheet.
Claims (1)
1. a kind of primary air pressure desired value intelligent control method, it is characterised in that based on primary air pressure desired value Based Intelligent Control system
System, the primary air pressure desired value intelligence control system include controller (5), adder (4), are used for producing benchmark primary air pressure
Preset value the first control logic module (3), for produce additional primary air pressure preset value the second Logic control module
(2) and for gathering the acquisition module (1) of the AGC instructions that electric energy management system sends；
The outfan of acquisition module (1) is connected with the control end of the second Logic control module (2), the second logic control mould
The outfan of the outfan of block (2) and the first control logic module (3) is connected with the input of adder (4), adder (4)
Outfan be connected with the input of controller (5), the control of hot-air damper in the outfan of controller (5) and an air channel
End is connected；
Comprise the following steps：
1) when the change of generating set load is in preset range, the first control logic module (3) produces benchmark primary air pressure
Preset value, the second Logic control module (2) is output as " 0 ", and controller (5) is logical according to the preset value of the benchmark primary air pressure
The aperture of hot-air damper in air channel of control is crossed adjusting the primary air pressure size entered in boiler；
When generating set load change not in preset range when, acquisition module (1) the collection AGC that sends of electric energy management system refers to
Order, and AGC instructions are forwarded in the second Logic control module (2), the second Logic control module (2) is produced and is added once
The preset value of blast；First control logic module (3) produces the preset value of benchmark primary air pressure, the additional primary air pressure simultaneously
Preset value be added by adder (4) with the preset value of benchmark primary air pressure after, obtain the preset value of actual primary air pressure, control
Device (5) is entered into adjust by the aperture for controlling hot-air damper in an air channel according to the set-point of the actual primary air pressure
Primary air pressure size in boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510184808.4A CN104848250B (en) | 2015-04-17 | 2015-04-17 | A kind of primary air pressure desired value intelligence control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510184808.4A CN104848250B (en) | 2015-04-17 | 2015-04-17 | A kind of primary air pressure desired value intelligence control system and method |
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| Publication Number | Publication Date |
|---|---|
| CN104848250A CN104848250A (en) | 2015-08-19 |
| CN104848250B true CN104848250B (en) | 2017-03-15 |
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| CN201510184808.4A Expired - Fee Related CN104848250B (en) | 2015-04-17 | 2015-04-17 | A kind of primary air pressure desired value intelligence control system and method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762769B (en) * | 2017-01-09 | 2018-08-14 | 大唐东北电力试验研究所有限公司 | The primary air pressure desired value decision-making technique and system contributed based on mill group |
| CN108036357A (en) * | 2017-11-30 | 2018-05-15 | 国网辽宁省电力有限公司电力科学研究院 | A kind of fired power generating unit primary air fan automatically controls optimization method |
| CN108758684A (en) * | 2018-05-09 | 2018-11-06 | 西安热工研究院有限公司 | A kind of boiler secondary air baffle opening desired value kinetic-control system and method |
| CN109681910B (en) * | 2018-12-24 | 2020-10-02 | 中国神华能源股份有限公司 | Method and device for regulating pressure |
| CN110701634A (en) * | 2019-09-18 | 2020-01-17 | 上海发电设备成套设计研究院有限责任公司 | Primary air pressure control system and control method thereof |
| CN112327778B (en) * | 2020-11-13 | 2022-08-19 | 华润电力（涟源）有限公司 | Automatic primary air pressure adjusting method for thermal power plant |
| CN112619862B (en) * | 2020-11-16 | 2022-05-17 | 中国神华能源股份有限公司国华电力分公司 | Method and system for controlling sealing wind pressure of coal mill inlet |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4205631A (en) * | 1978-10-11 | 1980-06-03 | Westinghouse Electric Corp. | Pressure limiting control for an inlet draft fan in an electric power plant |
| JPH05240422A (en) * | 1992-02-28 | 1993-09-17 | Toshiba Corp | Combustion air flow rate controller |
| CN103104931B (en) * | 2011-11-09 | 2015-11-04 | 华北电力科学研究院有限责任公司 | A kind of primary frequency modulation method based on boiler primary air pressure dynamic compensation and system |
| CN202675352U (en) * | 2012-07-20 | 2013-01-16 | 大唐信阳发电有限责任公司 | Automatic air supply control system of boiler |
| CN103047670B (en) * | 2013-01-29 | 2015-06-17 | 福州福大自动化科技有限公司 | Direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system and method thereof |
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2015
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Granted publication date: 20170315 Termination date: 20180417 |