CN101078526A - Power boiler burning optimization method and device based on infra red radiation energy signal - Google Patents
Power boiler burning optimization method and device based on infra red radiation energy signal Download PDFInfo
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- CN101078526A CN101078526A CN 200710069862 CN200710069862A CN101078526A CN 101078526 A CN101078526 A CN 101078526A CN 200710069862 CN200710069862 CN 200710069862 CN 200710069862 A CN200710069862 A CN 200710069862A CN 101078526 A CN101078526 A CN 101078526A
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Abstract
The invention discloses a burning optimal method for power station boiler based on infrared radiant energy signal and the device. It is divided into hardware and software. The hardware comprises three parts. The first part comprises near infrared radiant energy sensor installed on four corners of boiler. The near infrared radiant energy is transferred to photoelectric transition component by fibers. The photoelectric transition component is connected with the data collecting and transferring control module of lower computer. The second part comprises the data collecting and transferring control module of lower computer located in the boiler body. The third part comprises data analyzing and control signal outputting module of upper computer located in electric room. The software system is developed by Labview programming software. The near infrared radiant energy sensor is used to obtain intensity information of radiant energy in boiler and by the optimization method of artificial neutral network deviation value of radiant energy can be obtained. Then the deviation value treated by filter is transferred to the control module of DCS boiler fuel to improve coal-feeding control logic and unit response speed for loading. The running stability of steamer is insured.
Description
Technical field
The present invention relates to the power boiler burning optimization technology, be specifically related to a kind of power boiler burning optimization method and device based on near-infrared radiation energy signal.
Background technology
The Fuel Control System of quadrangle tangential circle pulverized coal firing boiler is the most complicated part in the boiler body control, 300MW and its burning of 600MW station boiler for domestic main flow are controlled usually by the fuel adjustment, air-supply is adjusted and air inducing is adjusted three parts composition, generally adopt boiler follow, the methods of operation such as turbine follow or coordination control with the variation of boiler load.No matter which kind of method of operation all needs to use " heat signal " usually as going into the feedback signal that the stove fuel quantity is regulated.Heat signal is from the variation of drum pressure and main steam flow, and from fuel quantity change to variation that burning produces heat again to the variation of drum pressure and main steam amount no matter for direct-firing still in the middle of warehouse formula boiler, it all is the inertial element of a large time delay, especially along with the increase of boiler capacity, hysteresis is more obvious.Because it delays characteristic, original control system exists not enough on the stability of real time response speed that satisfies load and main steam pressure.
Radiation of burner hearth can signal be an optimal selection signal of compensation heat signal hysteresis deficiency.From the in-depth analysis to the stove internal combustion, the radiation intensity signal has following characteristics:
1. radiant energy is the main source of furnace heat transfer, and the variation of going into stove fuel quantity or air quantity all can make radiant energy promptly change, and radiation simultaneously also can be reacted the combustion characteristics of different coals;
2. radiation intensity signal response fuel change speed is fast.The heat that fuel combustion produces at first with radiant energy with mode Medium Diffusion towards periphery, and radiant energy transmits in electromagnetic mode, does not therefore almost lag behind in time;
3. radiant energy varies with temperature significantly;
4. radiant energy signal is with the linear relationship that is varied to of stove internal combustion coal amount, air quantity, oxygen amount.
Summary of the invention
The object of the present invention is to provide power boiler burning optimization method and device based on infra red radiation energy signal.
The technical solution adopted for the present invention to solve the technical problems is:
One, a kind of power boiler burning optimization method based on infra red radiation energy signal:
Utilize near-infrared radiation to obtain radiant energy strength information in the stove by sensor, and obtain the radiant energy deviate by the artificial neural network optimal method, the deviate after then filtering being handled inserts DCS boiler oil control module, improves the coal supply control logic.
Two, a kind of power boiler burning optimization device based on infra red radiation energy signal:
Be divided into two parts of hardware and software, the hardware of system comprises three parts: first comprises the near-infrared radiation energy sensor that is installed in four jiaos in boiler, near-infrared radiation can be by Optical Fiber Transmission to photo-electric conversion element, and photo-electric conversion element links to each other with slave computer data acquisition and transmission control module; Second portion comprises slave computer data acquisition and the transmission control module that is positioned at boiler body; Third part comprises host computer data analysis and the control signal output module that is positioned at electronic room, and data acquisition and transmission control module comprise with lower module: NI CRIO-9002, NI CRIO-9101, NI CRIO-9215 and data switching exchane; Data analysis and control signal output module comprise with lower module: NI PXI-1042, NI PXI-6704, NI PXI-6259.Slave computer collects radiant energy signal in the real-time stove, be connected to data switching exchane through netting twine, NI PXI-1042 Data Control host computer utilizes the TCP/IP network, read real-time radiant energy signal and read boiler operating parameter from power plant's PI runtime database from slave computer, NI PXI-6704 output 0～20mA current signal is in Power Plant DCS System; Software systems adopt the exploitation of Labview programming software.
The beneficial effect that the present invention has is:
Utilize the infra red radiation energy signal of stove fuel combustion process emission, shift to an earlier date feedback quantity as one, insert in the DCS boiler master module, original fuel control logic based on " heat signal " is improved, improve the load responding speed of unit, overcome because the boiler main steam pressure that fuel value or fuel survey interference cause and the fluctuation of flow guarantee the stability that steam turbine moves.
Description of drawings
Fig. 1 is a radiant energy sensor installation site schematic diagram.
Fig. 2 is the apparatus structure schematic diagram.
Fig. 3 is the optimal control logical schematic.
Among the figure: 1, near-infrared radiation can sensor, and 2, optical fiber, 3, photo-electric conversion element, 4, data acquisition and transmission control module, 5, data analysis and control signal output module.
The specific embodiment
As Fig. 1, shown in Figure 2, near-infrared radiation can sensor 1 be installed in four jiaos of 35.432m height of boiler, radiation of burner hearth can be obtained by sensor 1 by near-infrared radiation, be transferred to photo-electric conversion element PDA553 by optical fiber 2, in photo-electric conversion element, export 0～10V voltage signal by BNC connector, be transferred to control centre through netting twine afterwards through conversion.NICRIO-9002 in slave computer data acquisition and the transmission control module 4 is a data acquisition slave computer on the spot, is used for the control of data acquisition and transmission, by ICP/IP protocol and host computer data analysis and 5 communications of control signal output module.Radiant energy signal in the real-time stove of slave computer input is connected to switch through netting twine, and NI PXI-1042 Data Control host computer utilizes the TCP/IP network, reads real-time radiant energy signal and reads boiler operating parameter from power plant's PI runtime database from slave computer.NI PXI-6704 is based on the analog output module of PXI interface, is input in the Power Plant DCS fuel control module obtaining the radiant energy deviate by the artificial neural network optimal method, improves the coal supply control logic.As shown in Figure 3, after heat signal was meant that fuel enters the burner hearth burning, the heat that is produced in the unit interval was steam flow signal D and drum pressure P
bThe differential signal sum.Original coal supply logic is to utilize heat signal input air pressure adjuster, air pressure standard value P before atmospheric pressure value that obtains and the machine
TCompare the back fuel trimmer is controlled, response process has very big delay.Improved coal supply logic has added through the infrared energy standard deviation value E after the processing of artificial neural network optimization method, and the time of having improved the control response process greatly, weight is provided with the size that the unit is used to control input infrared energy standard deviation value E.Wherein, the Mathematical Modeling through the infrared energy standard deviation value E after the processing of artificial neural network optimization method is as follows:
In the formula:
R
3 32Actual four jiaos of radiant energy r in the stove after three grades of filtering of-expression are handled
1, r
2, r
3, r
4The integral mean of 32 moment point, this value has been represented the input heat.
R
0-expression through the artificial neural network optimal method obtain corresponding to current operational factor x
1, x
2, x
3, x
4Deng theoretical radiant energy, this value has been represented the demand heat.
Δ R
t-represented the radiant energy control signal of output.Δ R
t＞0 expression input is greater than demand, and need reduce fuel quantity this time, otherwise then the expression input is less than demand, and need increase fuel quantity this time.
Claims (2)
1, a kind of power boiler burning optimization method based on near-infrared radiation energy signal, it is characterized in that: utilize near-infrared radiation to obtain radiant energy strength information in the stove by sensor, and obtain the radiant energy deviate by the artificial neural network optimal method, deviate after then filtering being handled inserts DCS boiler oil control module, improves the coal supply control logic.
2, a kind of power boiler burning optimization device that is used for the described method of claim 1 based on near-infrared radiation energy signal, it is characterized in that: be divided into two parts of hardware and software, the hardware of system comprises three parts: first comprises the near-infrared radiation energy sensor (1) that is installed in four jiaos in boiler, near-infrared radiation can be transferred to photo-electric conversion element (3) by optical fiber (2), and photo-electric conversion element (3) links to each other with slave computer data acquisition and transmission control module (4); Second portion comprises slave computer data acquisition and the transmission control module (4) that is positioned at boiler body; Third part comprises host computer data analysis and the control signal output module (5) that is positioned at electronic room, and data acquisition and transmission control module (4) comprise with lower module: NI CRIO-9002, NI CRIO-9101, NICRIO-9215 and data switching exchane; Data analysis and control signal output module (5) comprise with lower module: NIPXI-1042, NI PXI-6704, NI PXI-6259.Slave computer collects radiant energy signal in the real-time stove, be connected to data switching exchane through netting twine, NI PXI-1042 Data Control host computer utilizes the TCP/IP network, read real-time radiant energy signal and read boiler operating parameter from power plant's PI runtime database from slave computer, NIPXI-6704 output 0～20mA current signal is in Power Plant DCS System; Software systems adopt the exploitation of Labview programming software.
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| CNB200710069862XA CN100513880C (en) | 2007-07-03 | 2007-07-03 | Power boiler burning optimization method and device based on infra red radiation energy signal |
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| CNB200710069862XA CN100513880C (en) | 2007-07-03 | 2007-07-03 | Power boiler burning optimization method and device based on infra red radiation energy signal |
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| CN101078526A true CN101078526A (en) | 2007-11-28 |
| CN100513880C CN100513880C (en) | 2009-07-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498457B (en) * | 2009-03-02 | 2010-08-25 | 杭州电子科技大学 | Boiler combustion optimizing method |
| CN102680023A (en) * | 2012-05-24 | 2012-09-19 | 哈尔滨电机厂有限责任公司 | Portable multifunctional motor test detecting and analyzing instrument |
| CN102998979A (en) * | 2012-12-17 | 2013-03-27 | 富通集团有限公司 | Operation optimization method of medium-frequency induction heating furnace |
| CN107016176A (en) * | 2017-03-24 | 2017-08-04 | 杭州电子科技大学 | A kind of hybrid intelligent overall boiler burning optimization method |
| CN111237803A (en) * | 2020-02-27 | 2020-06-05 | 西安理工大学 | Boiler combustion control system and method based on LabVIEW |
-
2007
- 2007-07-03 CN CNB200710069862XA patent/CN100513880C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498457B (en) * | 2009-03-02 | 2010-08-25 | 杭州电子科技大学 | Boiler combustion optimizing method |
| CN102680023A (en) * | 2012-05-24 | 2012-09-19 | 哈尔滨电机厂有限责任公司 | Portable multifunctional motor test detecting and analyzing instrument |
| CN102998979A (en) * | 2012-12-17 | 2013-03-27 | 富通集团有限公司 | Operation optimization method of medium-frequency induction heating furnace |
| CN107016176A (en) * | 2017-03-24 | 2017-08-04 | 杭州电子科技大学 | A kind of hybrid intelligent overall boiler burning optimization method |
| CN111237803A (en) * | 2020-02-27 | 2020-06-05 | 西安理工大学 | Boiler combustion control system and method based on LabVIEW |
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| Publication number | Publication date |
|---|---|
| CN100513880C (en) | 2009-07-15 |
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Application publication date: 20071128 Assignee: Hangzhou Jinjiang Group Co., Ltd. Assignor: Zhejiang University Contract record no.: 2015330000163 Denomination of invention: Power boiler burning optimization method and device based on infra red radiation energy signal Granted publication date: 20090715 License type: Common License Record date: 20150616 |
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