CN103148509A - Method for improving thermal efficiency of industrial furnace kiln by virtue of detecting flame condition and regulating oxygen enrichment flow - Google Patents
Method for improving thermal efficiency of industrial furnace kiln by virtue of detecting flame condition and regulating oxygen enrichment flow Download PDFInfo
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- CN103148509A CN103148509A CN2013101080297A CN201310108029A CN103148509A CN 103148509 A CN103148509 A CN 103148509A CN 2013101080297 A CN2013101080297 A CN 2013101080297A CN 201310108029 A CN201310108029 A CN 201310108029A CN 103148509 A CN103148509 A CN 103148509A
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- oxygen enrichment
- thermal efficiency
- enrichment flow
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a method for improving the thermal efficiency of a combustion furnace by virtue of detecting the flame condition and regulating the oxygen enrichment flow, and the method is especially suitable for an industrial furnace kiln provided with an oxygen enrichment combustion-supporting device and can be used for improving the thermal efficiency of the industrial furnace kiln. The method comprises the following steps of: an optoelectronic signal conversion step, a signal processing step, and a signal analysis and oxygen enrichment flow regulating step. According to the method for improving the thermal efficiency, in the signal processing process, the flame intensity signal and flame flickering frequency signal of a combustor are respectively subjected to amplification treatment, so that the flame intensity signal and the flame flickering frequency signal in flame signals can be effectively identified, and the distortion phenomenon of the flame flickering frequency signal is eliminated; and by virtue of the correlation analysis on data collected during the burning process, the oxygen enrichment flow in the oxygen enrichment combustion-supporting device is regulated, fuels are fully burned, and thus the thermal efficiency of the industrial furnace kiln is improved.
Description
Technical field
The present invention relates to a kind of method that improves the combustion furnace thermal efficiency by flame detection status adjustment oxygen enrichment flow, be specially adapted to be equipped with the industrial furnace of oxygen-enriched combustion aid, improve its thermal efficiency.
Background technology
World today's energy shortage, all kinds of fossil energy prices are unprecedented soaring, a lot of big power consumer's performance of enterprises reduce greatly, seriously fettered enterprise's long term growth, especially use enterprise's phenomenon of industrial furnace more obvious, therefore improve energy utilization rate, reduce the road that energy resource consumption becomes the certainty that improves the performance of enterprises.Along with country more and more payes attention to energy-saving and emission-reduction, there have been many enterprises to be equipped with the oxygen-enriched combustion-supporting energy saver.
Along with the popularization of rich Combustion Technics, the problem of corresponding appearance is also more and more at present:
1, only emphasis utilizes advanced oxygenerating technology to obtain the oxygen rich gas of 30% left and right concentration, replaces the part combustion air with the minimizing intake, thereby reduces the heat that inert gas is taken away, and promotes burning to reach energy-conservation thereby improve simultaneously oxygen content; But do not take full advantage of these oxygen enrichment resources and increase its radiation efficiency.
During 2, due to different types of fuel combustion, the flame flicking frequency is different, flame intensity under every kind of flame flicking frequency is also different, thereby the oxygen enrichment flow that needs during different types of fuel combustion is also different, oxygen-enriched combustion aid can not according to the actual conditions adjust flux, be difficult to reach the energy-saving effect of expection.
3, it is irrational mating fully by rule of thumb the oxygen enrichment flow: burning is a very complicated chemical process, not related with burner hearth heat radiation and distribution thereof, therefore to remove to mate the oxygen enrichment flow be unscientific by visually observing flame and combustion fan air quantity, tend to like this occur: 1, the configuration of oxygen enrichment flow is excessive, causes the waste of client's cost of investment; 2, the configuration of oxygen enrichment flow is too small, does not reach the energy-saving effect of expection.
Summary of the invention
The object of the present invention is to provide a kind of method that improves the industrial furnace thermal efficiency by flame detection status adjustment oxygen enrichment flow.
The objective of the invention is to realize by following approach: a kind of method that improves the industrial furnace thermal efficiency by flame detection status adjustment oxygen enrichment flow, the method comprises the following steps:
A. photosignal conversion: use photoelectric sensor combustion flame analog signals Q0 corresponding to the combustion flame optical signal to convert to;
B. signal is processed, and comprises following substep:
A. combustion flame analog signals Q0 is carried out signal amplification, signal filtering processing, obtain processing rear signal Q1;
B. isolate the AC signal Qa that represents the flame flicking frequency and the direct current signal Qb that represents flame intensity from signal Q1;
C. the AC signal Qa that represents the flame flicking frequency and the direct current signal Qb that represents flame intensity are carried out respectively the operation amplifier processing, obtain operation amplifier and process rear respective signal QA and QB, make the value of QA and QB in identical order of magnitude scope;
D. convert QB to data signal, and carry out the data collection: obtain time series flame intensity signal discrete value X;
E. convert QA to data signal, and carry out the data collection, obtain uniformly-spaced continuous sampling value Qk; The line frequency analysis of spectrum of going forward side by side obtains time series flame flicking frequency signal Y;
C. signal analysis and adjusting oxygen enrichment flow comprises following substep:
The Y of a. variation of continuous monitoring flame intensity signal discrete value X, and flame flicking frequency signal centrifugal pump changes;
B. the time series coefficient correlation variation tendency according to two kinds of signals judges flame status: if the coefficient correlation changing value Δ Qt in the adjacent time interval and Δ Yt less than setting value, judge that oxygen-enriched content is not enough, need to increase the oxygen enrichment flow; Greater than setting value, judge that oxygen-enriched content is excessive, need to reduce the oxygen enrichment flow.
As the further optimization of this programme, in b step in the step C, whether Δ Qt and Δ Yt be less than setting value.
A kind of method that improves the industrial furnace thermal efficiency by flame detection status adjustment oxygen enrichment flow of the present invention, the difference of the Rich Oxygen Amount of needs during according to different types of fuel combustion is regulated the oxygen enrichment flow, thereby reaches the purpose of energy-saving and emission-reduction.The present invention has avoided the sort of judgement by rule of thumb in the past, and the way of coupling oxygen enrichment flow causes the energy-saving effect that the client invests to waste or do not reach expectations of customer.
The specific embodiment
A kind of method that improves the industrial furnace thermal efficiency by flame detection status adjustment oxygen enrichment flow of the present invention comprises photosignal switch process, signal treatment step, signal analysis and oxygen enrichment flow regulating step.In the present embodiment, the signal input step is converted to corresponding analog signals by the visible light photoelectric sensor to the visible wavelength sensitivity with flare up fire; The signal treatment step is completed by hardware circuit and the software program that is placed in single-chip microcomputer; Signal analysis and oxygen enrichment flow regulating step are completed by the software program that is placed in single-chip microcomputer and PLC.
The method comprises the following steps:
A. photosignal conversion: use photoelectric sensor combustion flame analog signals Q0 corresponding to the combustion flame optical signal to convert to;
B. signal is processed, and comprises following substep:
A. combustion flame analog signals Q0 is carried out signal amplification, signal filtering processing, obtain processing rear signal Q1;
B. isolate the AC signal Qa that represents the flame flicking frequency and the direct current signal Qb that represents flame intensity from signal Q1;
C. the AC signal Qa that represents the flame flicking frequency and the direct current signal Qb that represents flame intensity are carried out respectively the operation amplifier processing, obtain operation amplifier and process rear respective signal QA and QB, make the value of QA and QB in identical order of magnitude scope;
D. convert QB to data signal, and carry out the data collection: obtain time series flame intensity signal discrete value X;
E. convert QA to data signal, and carry out the data collection, obtain uniformly-spaced continuous sampling value Qk; The line frequency analysis of spectrum of going forward side by side obtains time series flame flicking frequency signal Y;
C. signal analysis and adjusting oxygen enrichment flow comprises following substep:
The Y of a. variation of continuous monitoring flame intensity signal discrete value X, and flame flicking frequency signal centrifugal pump changes;
B. the time series coefficient correlation variation tendency according to two kinds of signals judges flame status: if the coefficient correlation changing value Δ Qt in the adjacent time interval and Δ Yt less than setting value, judge that oxygen-enriched content is not enough, need to increase the oxygen enrichment flow; Greater than setting value, judge that oxygen-enriched content is excessive, need to reduce the oxygen enrichment flow.
Claims (1)
1. one kind is passed through the method that flame detection status adjustment oxygen enrichment flow improves the industrial furnace thermal efficiency, and it is characterized in that: the method comprises the following steps:
A. photosignal conversion: use photoelectric sensor combustion flame analog signals Q0 corresponding to the combustion flame optical signal to convert to;
B. signal is processed, and comprises following substep:
A. combustion flame analog signals Q0 is carried out signal amplification, signal filtering processing, obtain processing rear signal Q1;
B. isolate the AC signal Qa that represents the flame flicking frequency and the direct current signal Qb that represents flame intensity from signal Q1;
C. the AC signal Qa that represents the flame flicking frequency and the direct current signal Qb that represents flame intensity are carried out respectively the operation amplifier processing, obtain operation amplifier and process rear respective signal QA and QB, make the value of QA and QB in identical order of magnitude scope;
D. convert QB to data signal, and carry out the data collection: obtain time series flame intensity signal discrete value X;
E. convert QA to data signal, and carry out the data collection, obtain uniformly-spaced continuous sampling value Qk; The line frequency analysis of spectrum of going forward side by side obtains time series flame flicking frequency signal Y;
C. signal analysis and adjusting oxygen enrichment flow comprises following substep:
The Y of a. variation of continuous monitoring flame intensity signal discrete value X, and flame flicking frequency signal centrifugal pump changes;
B. the time series coefficient correlation variation tendency according to two kinds of signals judges flame status: if the coefficient correlation changing value Δ Qt in the adjacent time interval and Δ Yt less than setting value, judge that oxygen-enriched content is not enough, need to increase the oxygen enrichment flow; Greater than setting value, judge that oxygen-enriched content is excessive, need to reduce the oxygen enrichment flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101080297A CN103148509A (en) | 2013-04-01 | 2013-04-01 | Method for improving thermal efficiency of industrial furnace kiln by virtue of detecting flame condition and regulating oxygen enrichment flow |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101080297A CN103148509A (en) | 2013-04-01 | 2013-04-01 | Method for improving thermal efficiency of industrial furnace kiln by virtue of detecting flame condition and regulating oxygen enrichment flow |
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| CN103148509A true CN103148509A (en) | 2013-06-12 |
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| CN2013101080297A Pending CN103148509A (en) | 2013-04-01 | 2013-04-01 | Method for improving thermal efficiency of industrial furnace kiln by virtue of detecting flame condition and regulating oxygen enrichment flow |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064113A (en) * | 2017-06-13 | 2017-08-18 | 华电青岛发电有限公司 | One kind realizes burner coal dust firing quality detecting system and method using optical fiber |
| CN108613176A (en) * | 2018-05-03 | 2018-10-02 | 蓬莱市海正机械配件有限公司 | Photoelectricity merges intelligent burner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0658521A (en) * | 1992-06-12 | 1994-03-01 | Ebara Corp | Burned waste gas oxygen concentration control method in burning installation |
| CN2479357Y (en) * | 2001-05-15 | 2002-02-27 | 辛德福 | Gas boiler controller |
| CN200949838Y (en) * | 2006-04-14 | 2007-09-19 | 北京国电华源控制技术有限公司 | Boiler whirlwind oilless lighting start device |
| CN101339072A (en) * | 2008-08-12 | 2009-01-07 | 黎永前 | Flame status checking method |
| CN100489413C (en) * | 2005-01-28 | 2009-05-20 | （株）庆东Network | Boiler for detecting innormal burning situation using air pressure sensor and flame |
-
2013
- 2013-04-01 CN CN2013101080297A patent/CN103148509A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0658521A (en) * | 1992-06-12 | 1994-03-01 | Ebara Corp | Burned waste gas oxygen concentration control method in burning installation |
| CN2479357Y (en) * | 2001-05-15 | 2002-02-27 | 辛德福 | Gas boiler controller |
| CN100489413C (en) * | 2005-01-28 | 2009-05-20 | （株）庆东Network | Boiler for detecting innormal burning situation using air pressure sensor and flame |
| CN200949838Y (en) * | 2006-04-14 | 2007-09-19 | 北京国电华源控制技术有限公司 | Boiler whirlwind oilless lighting start device |
| CN101339072A (en) * | 2008-08-12 | 2009-01-07 | 黎永前 | Flame status checking method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064113A (en) * | 2017-06-13 | 2017-08-18 | 华电青岛发电有限公司 | One kind realizes burner coal dust firing quality detecting system and method using optical fiber |
| CN108613176A (en) * | 2018-05-03 | 2018-10-02 | 蓬莱市海正机械配件有限公司 | Photoelectricity merges intelligent burner |
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Application publication date: 20130612 |
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