CN201965099U - Device for measuring fly ash carbon content of boiler in power plant - Google Patents
Device for measuring fly ash carbon content of boiler in power plant Download PDFInfo
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- CN201965099U CN201965099U CN 201120094292 CN201120094292U CN201965099U CN 201965099 U CN201965099 U CN 201965099U CN 201120094292 CN201120094292 CN 201120094292 CN 201120094292 U CN201120094292 U CN 201120094292U CN 201965099 U CN201965099 U CN 201965099U
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Abstract
The utility model provides a device for measuring fly ash carbon content of a boiler in a power plant, and overcomes the problems in the prior art that the single microwave measurement of fly ash carbon content is easily affected by the change in coal quality and the change in fly ash component. The device comprises a flue working state unit, a computer-controlled fly ash carbon content analysis unit and an alarm display unit. The utility model adopts the technical scheme as follows: the flue working state unit and a boiler working state unit are connected with the computer-controlled fly ash carbon content analysis unit through a first data bus, a second data bus and a data input unit, so as to achieve the effect of collection and fusion processing of multiple signals in the flue and the boiler and complete the fly ash carbon content measurement based on the combination of microwave and radial basis function (RBF) network. Compared with the similar products, the device not only has a reasonable structure design and a high measurement speed but also can greatly improve the accuracy of real-time monitoring and measurement of the fly ash carbon content and ensure the measurement accuracy of the fly ash carbon content.
Description
Technical field
The utility model relates to a kind of unburned carbon in flue dust measurement mechanism, particularly a kind of employing microwave with based on RBF(Radical Basis Function, radial basis function) the boiler of power plant unburned carbon in flue dust measurement mechanism that combines of network also is applicable to the unburned carbon in flue dust in other relevant place of real-time monitoring.
Background technology
As everyone knows, the thermal efficiency of station boiler has reflected the size of boiler heat loss, is the important indicator of estimating boiler economic operation.And one of main loss that influences the station boiler thermal efficiency is a heat loss due to unburned carbon, the calculating of heat loss due to unburned carbon mainly depends on the size of unburned carbon in flue dust, want to realize the burning optimization of boiler, must at first realize the on-line measurement of unburned carbon in flue dust.According to the pertinent literature report, the On-line Measuring Method of existing station boiler unburned carbon in flue dust mainly contains following common several: online weighing method, optical reflection method, radiation technique, Infrared survey method and microwave absorbing method etc.Wherein the online weighing method is because of it adopts high-temperature calcination, process such as weigh, so exist Measuring Time to lag behind, real-time is poor slightly; Optical reflection method and Infrared survey method can be very big to the measuring accuracy influence because of the variation of coal, ash component.The microwave absorbing method is based on carbon in the flying dust and the microwave of specific wavelength is inhaled is to some extent proposed, this method is that present measuring speed is very fast, the higher a kind of measuring method of commercialization degree, mostly adopt during in-site measurement on boiler horizontal gas pass and fly ash sampler to be installed or microwave probe is realized, this is to use more common mounting means, name as Chinese patent CN200810243561.9 is called " fume duct fly ash carbon content monitoring device ", related a kind of so just equipment of determining unburned carbon in flue dust by the size that detects microwave loss in flue.But this method is because of only being provided with the flue work state cell of being made up of microwave launcher and microwave receiving pick-up unit in flue, adopt single microwave measurement unburned carbon in flue dust, so there is a following problem: need do demarcation with the flying dust of principal component, in case ature of coal changes, flyash ingredient changes, and then make electromagnetic wave waste difference, therefore the non-characteristic absorption that is produced can influence the reliability of determination data, causes measuring accuracy to reduce significantly even can not normally use.
The utility model content
The purpose of this utility model provides a kind of boiler of power plant unburned carbon in flue dust measurement mechanism, it has existed when having overcome existing single microwave measurement unburned carbon in flue dust is subject to the shortcomings such as influence that ature of coal changes, flyash ingredient changes, it compared with similar products, reasonable in design not only, measuring speed is fast, and improved real-time monitoring unburned carbon in flue dust measuring accuracy greatly, guaranteed the accuracy that unburned carbon in flue dust is measured.
The technical scheme that the utility model adopted is: this boiler of power plant unburned carbon in flue dust measurement mechanism comprises flue work state cell, computer-controlled unburned carbon in flue dust analytic unit and alarm indication unit, and its technical essential is: described flue work state cell is made of furnace outlet flue gas oxygen level sensor, microwave signal source, microwave transmitting terminal, microwave receiving end and microwave power detector; By the boiler load sensor, a wind pressure sensor, the secondary air pressure sensor, burner pulverized coal flow sensor, fineness of pulverized coal sensor and coal dust industrial components sensor are formed the kettleman and are made state cell, described boiler work state cell and described flue work state cell are respectively by first, two data buss and data input cell are connected to described computer-controlled unburned carbon in flue dust analytic unit, by described alarm indication unit the Calculation results of described computer-controlled unburned carbon in flue dust analytic unit are shown unburned carbon in flue dust in real time, search historical record, the prompting of unburned carbon in flue dust overload alarm; Described data input cell is made of the universal data collection card; Described computer-controlled unburned carbon in flue dust analytic unit comprises RBF network load module, RBF network work node module, RBF network dormancy node module, RBF network output module, RBF network criterion module and RBF network correcting module; Described data input cell is connected to the described RBF network load module in the described computer-controlled unburned carbon in flue dust analytic unit; Described RBF network load module is connected with described RBF network work node module; Described RBF network work node module is connected to described RBF network output module; Described RBF network output module and described RBF criterion module and alarm indication unit interconnect; Described RBF criterion module and described RBF network correcting module interconnect; Described RBF network correcting module, described RBF network work node module and described RBF network dormancy node module interconnect.
Advantage and the good effect that the utlity model has are: because boiler work state cell of the present utility model is connected computer-controlled unburned carbon in flue dust analytic unit by first and second data bus respectively with flue work state cell with data input cell, so be easy to realize many signals collecting and fusion treatment in flue and the boiler, finish and adopt microwave and the unburned carbon in flue dust measurement that combines based on the RBF network.This measurement mechanism is based on microwave measurement fume duct fly ash carbon content and RBF network technology, can with pass size, fineness of pulverized coal, coal dust industrial components (net calorific value, as received basis volatile matter, as received basis ash content and as received basis moisture), boiler load, the furnace outlet flue gas oxygen level of microwave attenuation amount behind the flue, the multiple parameters such as pulverized coal flow of blast, secondary blast and a burner merge mutually, it compared with similar products, reasonable in design not only, measuring speed is fast, and has improved the measuring accuracy of real-time monitoring unburned carbon in flue dust greatly.Simultaneously, because of computer-controlled unburned carbon in flue dust analytic unit has calculating unburned carbon in flue dust and online debugging functions based on the RBF network, so under special operation condition, when its RBF network criterion module analysis goes out unburned carbon in flue dust analytic unit fusion accuracy and is reduced to certain value, to start RBF network correcting module, after RBF network dormancy node is converted into RBF network work node, the center of the multiparameter sample of current input as it, onlinely make up new fusion mode apace, make the unburned carbon in flue dust analytic unit be applicable to the unburned carbon in flue dust measurement of any operating mode of boiler of power plant, the coal that is subject to that has existed when having avoided existing single microwave measurement unburned carbon in flue dust thus effectively changes, the problems such as influence that flyash ingredient changes have further guaranteed the precision of on-line measurement.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is a kind of flue work state cell structural representation among Fig. 1.
Fig. 3 is a kind of boiler work state cell structural representation among Fig. 1.
Sequence number explanation among the figure: 1 flue work state cell, 2 boiler work state cells, 3 first data buss, 4 data input cell, 5 computer-controlled unburned carbon in flue dust analytic units, 6 alarm indication unit, 7 second data buss, 1-1 furnace outlet flue gas oxygen level sensor, the 1-2 microwave signal source, 1-3 microwave transmitting terminal, the 1-4 flue, 1-5 microwave receiving end, the 1-6 microwave power detector, 2-1 boiler load sensor, wind pressure sensor of 2-2,2-3 secondary air pressure sensor, 2-4 burner pulverized coal flow sensor, 2-5 fineness of pulverized coal sensor, 2-6 coal dust industrial components sensor, 5-1 RBF network load module, 5-2 RBF network work node module, 5-3 RBF network dormancy node module, 5-4 RBF network output module, 5-5 RBF network criterion module, 5-6 RBF network correcting module.
Embodiment
Describe the concrete structure of the present utility model and the course of work in detail according to Fig. 1～3.This boiler of power plant unburned carbon in flue dust measurement mechanism comprises with the lower part: flue work state cell 1, boiler work state cell 2, first and second data bus 3,7, data input cell 4, parts such as computer-controlled unburned carbon in flue dust analytic unit 5 and alarm indication unit 6.Wherein:
Being installed in being used on the boiler of power plant flue gathers the flue work state cell 1 of furnace outlet flue gas oxygen level and microwave power, comprises furnace outlet flue gas oxygen level sensor 1-1, microwave signal source 1-2, microwave transmitting terminal 1-3, parts such as microwave receiving end 1-5, microwave power detector 1-6.
Be installed in the boiler work state cell 2 of collection boiler load on the boiler of power plant, blast, secondary blast, burner pulverized coal flow, fineness of pulverized coal, coal dust industrial components data such as (as received basis net calorific value, air dried basis volatile matter, air dried basis ash content and air-dried moistures), comprise parts such as boiler load sensor 2-1, wind pressure sensor 2-2, a secondary air pressure sensor 2-3, burner pulverized coal flow sensor 2-4, fineness of pulverized coal sensor 2-5, coal dust industrial components sensor 2-6.
Have the data that gather flue work state cell 1 and 2 collections of boiler work state cell, carry out the data input cell 4 of data filtering, translation function, by the universal data collection card, as formations such as PCI-1757UP or PCI-1755.By first and second data bus 3,7 and data input cell 4, the data transmission of gathering is arrived computer-controlled unburned carbon in flue dust analytic unit 5, carry out multiparameter and merge calculating and discriminatory analysis.
Have based on the calculating unburned carbon in flue dust of RBF network and the computer-controlled unburned carbon in flue dust analytic unit 5 of online debugging functions, comprise RBF network load module 5-1, RBF network work node module 5-2, RBF network dormancy node module 5-3, RBF network output module 5-4, RBF network criterion module 5-5, RBF network correcting module 5-6.Wherein RBF network load module 5-1, RBF network work node module 5-2 and RBF network output module 5-3 finish the multiparameter fusion jointly, obtain the unburned carbon in flue dust value; RBF network dormancy node module 5-3 has the function that working node is provided to RBF network work node module 5-2; RBF network criterion module 5-5 has the function that RBF network correcting module 5-6 is differentiated and whether started to the unburned carbon in flue dust measuring accuracy; RBF network correcting module 5-6 has among the adding of the node among the RBF network dormancy node module 5-3 RBF network work node module 5-2 and with the center of current input parameter as it, makes up the function of new fusion mode.This computer-controlled unburned carbon in flue dust analytic unit 5 merges the multiparameter of input with calculating and discriminatory analysis result, is transferred to alarm indication unit 6 and points out.
Functions such as alarm indication unit 6 has real-time demonstration unburned carbon in flue dust, searches historical record, the prompting of unburned carbon in flue dust overload alarm adopt common control circuit, are finished by the computing machine in the Control Room.
Flue work state cell 1, boiler work state cell 2 are connected computer-controlled unburned carbon in flue dust analytic unit 5 by second data bus 7, first data bus 3 respectively with data input cell 4.Wherein data input cell 4 is connected to the RBF network load module 5-1 in the computer-controlled unburned carbon in flue dust analytic unit; RBF network load module 5-1 is connected with RBF network work node module 5-2; RBF network work node module 5-2 is connected to RBF network output module 5-4; RBF network output module 5-4 and RBF criterion module 5-5 and alarm indication unit 6 interconnect; RBF network criterion module 5-5 and RBF network correcting module 5-6 interconnect; RBF network correcting module 5-6, RBF network work node module 5-2 and RBF network dormancy node module 5-3 interconnect.
Principle of work of the present utility model is: because the size of measured fume duct fly ash carbon content and pass flue after the size of microwave attenuation amount, the furnace outlet flue gas oxygen level, microwave power, boiler load, a blast, the secondary blast, the burner pulverized coal flow, fineness of pulverized coal and coal dust industrial components (as received basis net calorific value, the air dried basis volatile matter, air dried basis ash content and air-dried moisture) etc. parameter satisfy certain mapping relations, and computer-controlled unburned carbon in flue dust analytic unit 5 relies on the RBF network with optimal approximation performance and global optimum's characteristic just and carries out multiparameter and merge, and obtain unburned carbon in flue dust in real time, then by alarm indication unit 6 display analysis results.Because the computer-controlled unburned carbon in flue dust analytic unit 5 based on the RBF network has online debugging functions, under the special operation condition, its RBF network criterion module 5-5 analyzes the unburned carbon in flue dust measuring accuracy when being reduced to certain value, to start RBF network correcting module 5-6, computer-controlled unburned carbon in flue dust analytic unit 5 is revised, its unburned carbon in flue dust that is applicable to any operating mode of boiler of power plant is measured, guaranteed the precision of on-line measurement.
Off-line training step in the concrete course of work of the utility model is as follows:
One, gather furnace outlet flue gas oxygen level, microwave power, boiler load, blast, secondary blast, burner pulverized coal flow, fineness of pulverized coal, coal dust industrial components (as received basis net calorific value, air dried basis volatile matter, air dried basis ash content and air-dried moisture) with data such as corresponding unburned carbon in flue dust respectively as the input parameter and the desired output result of unburned carbon in flue dust analytic unit 5;
Two, parameter and the desired output result with the above-mentioned steps input deposits in the database through after the normalized, is used for the unburned carbon in flue dust analytic unit 5 of training computer control;
Three, the node center of computer-controlled unburned carbon in flue dust analytic unit 5 provides after being trained by the K means clustering algorithm;
Four, computer-controlled unburned carbon in flue dust analytic unit 5 is trained, device is finished off-line training after analysis result precision meets the requirements, and puts into on-the-spot the use.
On-line monitoring step in the concrete course of work of the utility model is as follows:
One, flue work state cell 1 and boiler work state cell 2 are respectively by flue gas oxygen content sensor 1-1, microwave power detector 1-6, boiler load sensor 2-1, a wind pressure sensor 2-2, secondary air pressure sensor 2-3, burner pulverized coal flow sensor 2-4, fineness of pulverized coal sensor 2-5 and coal dust industrial components sensor 2-6 finish the furnace outlet flue gas oxygen level, microwave power, boiler load, a blast, the secondary blast, the burner pulverized coal flow, fineness of pulverized coal, coal dust industrial components (as received basis net calorific value, the air dried basis volatile matter, air dried basis ash content and air-dried moisture) isoparametric monitoring;
Two, the parameter of above-mentioned steps monitoring is carried out with the off-line training step in after the identical normalization process, transfer to computer-controlled unburned carbon in flue dust analytic unit 5 by data input cell 4;
Three, computer-controlled unburned carbon in flue dust analytic unit 5 is analyzed to merge as calculated and unburned carbon in flue dust, and realizes showing in real time unburned carbon in flue dust, the prompting of searching historical record, unburned carbon in flue dust overload alarm by alarm indication unit 6.
Online correction step in the concrete course of work of the utility model is as follows:
One, when boiler flyash carbon content fusion error reaches certain value, RBF network criterion module 5-5 starts RBF network correcting module 5-6 the weights and the center of computer-controlled unburned carbon in flue dust analytic unit 5 is revised, otherwise computer-controlled unburned carbon in flue dust analytic unit 5 remains unchanged;
Two, during online correction, at first RBF network correcting module 5-6 adds RBF network work node module 5-2 with a node among the RBF network dormancy node module 5-3, and with the center of current input sample as it;
Three, the new samples that uses all samples of having trained then and just added, the weight coefficient matrix that the unburned carbon in flue dust analytic unit 5 of corrected Calculation machine control once more is correlated with is in order to calculate the unburned carbon in flue dust value more accurately next time;
Four, the makeover process of above-mentioned weights can be found the solution with the method for pseudoinverse.
Claims (1)
1. boiler of power plant unburned carbon in flue dust measurement mechanism, comprise flue work state cell, computer-controlled unburned carbon in flue dust analytic unit and alarm indication unit, it is characterized in that: described flue work state cell is made of furnace outlet flue gas oxygen level sensor, microwave signal source, microwave transmitting terminal, microwave receiving end and microwave power detector; By the boiler load sensor, a wind pressure sensor, the secondary air pressure sensor, burner pulverized coal flow sensor, fineness of pulverized coal sensor and coal dust industrial components sensor are formed the kettleman and are made state cell, described boiler work state cell and described flue work state cell are respectively by first, two data buss and data input cell are connected to described computer-controlled unburned carbon in flue dust analytic unit, by described alarm indication unit the Calculation results of described computer-controlled unburned carbon in flue dust analytic unit are shown unburned carbon in flue dust in real time, search historical record, the prompting of unburned carbon in flue dust overload alarm; Described data input cell is made of the universal data collection card; Described computer-controlled unburned carbon in flue dust analytic unit comprises RBF network load module, RBF network work node module, RBF network dormancy node module, RBF network output module, RBF network criterion module and RBF network correcting module; Described data input cell is connected to the described RBF network load module in the described computer-controlled unburned carbon in flue dust analytic unit; Described RBF network load module is connected with described RBF network work node module; Described RBF network work node module is connected to described RBF network output module; Described RBF network output module and described RBF criterion module and alarm indication unit interconnect; Described RBF criterion module and described RBF network correcting module interconnect; Described RBF network correcting module, described RBF network work node module and described RBF network dormancy node module interconnect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201120094292 CN201965099U (en) | 2011-04-02 | 2011-04-02 | Device for measuring fly ash carbon content of boiler in power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201120094292 CN201965099U (en) | 2011-04-02 | 2011-04-02 | Device for measuring fly ash carbon content of boiler in power plant |
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| CN201965099U true CN201965099U (en) | 2011-09-07 |
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| CN 201120094292 Expired - Fee Related CN201965099U (en) | 2011-04-02 | 2011-04-02 | Device for measuring fly ash carbon content of boiler in power plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226772A (en) * | 2011-04-02 | 2011-10-26 | 沈阳工程学院 | Device for measuring carbon content of fly ash in boiler of electric power plant |
| CN105067479A (en) * | 2015-09-01 | 2015-11-18 | 解海龙 | Method for implementing hybrid type fly ash carbon content online detection device |
| CN116542832A (en) * | 2023-03-13 | 2023-08-04 | 羚羊环保科技有限公司 | Lignite upgrading and drying environment monitoring system and method based on Internet of things |
-
2011
- 2011-04-02 CN CN 201120094292 patent/CN201965099U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226772A (en) * | 2011-04-02 | 2011-10-26 | 沈阳工程学院 | Device for measuring carbon content of fly ash in boiler of electric power plant |
| CN102226772B (en) * | 2011-04-02 | 2013-04-24 | 沈阳工程学院 | Device for measuring carbon content of fly ash in boiler of electric power plant |
| CN105067479A (en) * | 2015-09-01 | 2015-11-18 | 解海龙 | Method for implementing hybrid type fly ash carbon content online detection device |
| CN105067479B (en) * | 2015-09-01 | 2021-05-04 | 解海龙 | Implementation method of mixed fly ash carbon content online detection device |
| CN116542832A (en) * | 2023-03-13 | 2023-08-04 | 羚羊环保科技有限公司 | Lignite upgrading and drying environment monitoring system and method based on Internet of things |
| CN116542832B (en) * | 2023-03-13 | 2023-09-12 | 羚羊环保科技有限公司 | Lignite upgrading and drying environment monitoring system and method based on Internet of things |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20130402 |