WO2010072708A1 - Method and device for optimizing combustion in a power plant - Google Patents
Method and device for optimizing combustion in a power plant Download PDFInfo
- Publication number
- WO2010072708A1 WO2010072708A1 PCT/EP2009/067627 EP2009067627W WO2010072708A1 WO 2010072708 A1 WO2010072708 A1 WO 2010072708A1 EP 2009067627 W EP2009067627 W EP 2009067627W WO 2010072708 A1 WO2010072708 A1 WO 2010072708A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- combustion
- real
- distribution
- combustion chamber
- dimension
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
Definitions
- the invention relates to a method and a device for optimizing the combustion of fuel in a combustion chamber of a power plant in which a real concentration distribution of a substance and / or a real temperature distribution in the combustion chamber is measured.
- the basic objective is to monitor the combustion taking place in a combustion chamber of the power plant, for example a boiler with a square footprint of 10 meters by 10 meters, over the largest possible area in order to derive the necessary quantities for optimizing the combustion process can.
- absorption spectroscopy is known.
- sonic pyrometry is known. With absorption spectroscopy or sonic pyrometry, only mean values of a line in the boiler room or combustion chamber can be measured.
- the CAT measuring technique For calculating the temperature and concentration distribution in a plane of a combustion chamber from measured average values at different locations of the combustion chamber of a power plant, the CAT measuring technique, computer aided tomography, is known.
- the object is achieved by a method according to claim 1, a method according to claim 5, a device according to claim 9 and a device according to claim 10.
- Advantageous developments are described in the dependent claims.
- the inventive method for optimizing the combustion of fuel in a combustion chamber of a power plant comprises the steps of measuring a real concentration distribution of a substance in the combustion chamber in at least one dimension, evaluating the real concentration distribution and controlling the combustion of the fuel such that a symmetrical concentration distribution of the substance in the at least one dimension arises.
- the inventive method for optimizing the combustion of fuel in a combustion chamber of a power plant comprises the steps of measuring a real temperature distribution in the combustion chamber in at least one dimension, evaluating the real temperature distribution and controlling the combustion of the fuel such that a symmetrical temperature distribution arises in the at least one dimension.
- At least one index for the symmetry of the real concentration distribution and / or temperature distribution is determined, and when controlling at least one control parameter is changed as a function of the at least one code.
- a device according to the invention for optimizing the combustion of fuel in a combustion chamber of a power plant comprises a device for measuring a real temperature distribution in the combustion chamber in at least one dimension, a device for evaluating the real temperature distribution and a device for controlling the combustion of the fuel material such that a symmetrical temperature distribution in the at least one dimension arises.
- two-dimensional concentration distributions and / or temperature distributions are measured during the measurement and from this at least one one-dimensional concentration distribution or temperature distribution is calculated during the evaluation.
- the real concentration distribution and / or temperature distribution is split into several sections during evaluation and the combustion is controlled in such a way that a symmetrical concentration distribution or temperature distribution arises in each of the sections.
- an at least one-dimensional, but preferably two-dimensional distribution for the temperature and / or concentration of at least one substance is generated according to the invention on the basis of known measuring techniques. From the distribution thus measured, one-dimensional or mathematical distributions or curves along an axis or along an intercept are calculated. For the distributions, key figures are preferably determined which capture or describe the symmetry or asymmetry (skewness) of the mathematical distribution. Depending on the key figures suitable actuators, such as allocators for coal or air control valves are so dimmed that a symmetrical Vereilung arises in each axis. If several mathematical distributions exist along one axis, the considered axes are divided into suitable intercept sections and the above-mentioned optimization is then carried out for each of the sections.
- Fig. 2 shows an embodiment of the method
- a combustion chamber 10 of a not further illustrated coal power plant is shown in which burns a coal fire during operation of the coal power plant.
- the combustion chamber 10 are the fuel coal with associated fuel gases, flames 11 and exhaust gases.
- two measuring planes 12 and 14 are provided, at the edge of which are each spaced from each other measuring instruments 16.
- two of the measuring instruments 16 allow a linear measurement in the associated measuring plane 12 and 14, wherein with the aid of the measuring instruments 16 and an associated evaluation device 18 z.
- B. the concentration of the substances O2 (oxygen) and CO (carbon monoxide) can be measured.
- the temperature distribution in the associated measuring plane 12 or 14 can be determined with the measuring instruments 16 and the evaluation device 18.
- the measurement is based on a combination of measurement technology and CAT calculation.
- the evaluation device 18 is operationally coupled via a data bus 20 with an optimization device 22, an operating device 24 and a guide or control system 26. Via the operating device 24, the real concentration distributions determined by the evaluation device 18 as well as temperature distributions are used in such a way that proposals for optimizing the combustion can be made with the optimizing device 22 and these can be used in the guide device 26.
- the burning in the combustion chamber 10 flames 11 in particular in
- the optimization device 22 evaluates the measured real concentration distributions and controls the combustion in such a way that a symmetrical concentration distribution of the substances oxygen and carbon monoxide is formed in at least one axis or dimension.
- the associated method is illustrated in FIG. It comprises the step 28 of measuring the concentration distribution of at least the substances O 2 and CO in the abovementioned measurement planes 12 and 14. In step 30, the temperature distribution in these planes is determined.
- step 32 These input data are used in step 32 in order to use the concentration distributions to evaluate one-dimensional or mathematical distributions and associated key figures for the symmetry or asymmetry of the distributions. Further, the distributions or curves in step 32 are divided into several sections with their own , disassembled associated distributions.
- a step 34 on the basis of these investigations, an optimization of the combustion is carried out in such a way that symmetrical concentration and temperature distributions arise. These can be found in the exhibition levels 14 and 16 are monitored, so that a total of a closed loop for step 28 arises.
- the evaluation is based on three basic assumptions or three basic simplifications: Only direct measured values, moments and gradients of the measurements are used. In particular, the distribution tomography of the measured concentrations and temperatures is reconstructed on the basis of in particular 20 to 25 crossing points of the measurements. These direct measurements are described as feature vectors. Furthermore, the fundamental difference values between these direct measured values are used and, if desired, interim values can be determined on the basis of interpolation.
- the first to fourth moments are determined along the horizontal, the vertical and the two diagonals of each measuring field, ie each field between the crossing points.
- the moments are determined based on the profiles or distributions along each measurement direction or dimension.
- the first and second moments represent the mean and variance of a distribution.
- the third and fourth moments represent the skewness and camber of a distribution.
- the skewness is a measure of the symmetry or the lack of symmetry.
- the curvature is a measure of whether the distribution is acute or flat compared to a normal distribution or standard distribution.
- FIG. 3 shows the result of the combustion optimization thus performed. From FIG. 3 it can be clearly seen the largely symmetrical distribution of CO and O 2 in the measuring plane 12 after the optimization.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES09799346T ES2530677T3 (en) | 2008-12-22 | 2009-12-21 | Method and device for combustion optimization in a power plant |
US13/141,109 US20120058438A1 (en) | 2008-12-22 | 2009-12-21 | Method and Device for Optimizing Combustion in a Power Plant |
CN200980151076.1A CN102257325B (en) | 2008-12-22 | 2009-12-21 | For equipment and the method for Optimizing Combustion in power station |
EP09799346.3A EP2368071B1 (en) | 2008-12-22 | 2009-12-21 | Method and device for optimizing combustion in a power plant |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08172545.9 | 2008-12-22 | ||
EP08172545A EP2199679A1 (en) | 2008-12-22 | 2008-12-22 | Method and device for optimising the combustion in a power plant |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010072708A1 true WO2010072708A1 (en) | 2010-07-01 |
Family
ID=40822953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/067627 WO2010072708A1 (en) | 2008-12-22 | 2009-12-21 | Method and device for optimizing combustion in a power plant |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120058438A1 (en) |
EP (2) | EP2199679A1 (en) |
CN (1) | CN102257325B (en) |
ES (1) | ES2530677T3 (en) |
WO (1) | WO2010072708A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102032590B (en) * | 2010-12-31 | 2012-01-11 | 北京华电天仁电力控制技术有限公司 | Boiler combustion optimizing control system and optimizing control method based on accurate measurement system |
CN105444201B (en) * | 2014-09-26 | 2018-11-13 | 通用电气公司 | The method and its system of burning optimization |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4305645A1 (en) * | 1993-02-24 | 1994-08-25 | Rwe Entsorgung Ag | Procedure for the determination of characteristic properties of radical forming processes |
DE19509412A1 (en) * | 1995-03-15 | 1996-10-02 | Siemens Ag | Method and device for controlling the firing of a steam generator system |
WO1999039137A1 (en) * | 1998-01-30 | 1999-08-05 | Siemens Aktiengesellschaft | Method and device for operating an incinerator plant |
US7058617B1 (en) * | 1996-05-06 | 2006-06-06 | Pavilion Technologies, Inc. | Method and apparatus for training a system model with gain constraints |
US20060176486A1 (en) * | 2005-02-08 | 2006-08-10 | General Electric Company | Method and apparatus for optical detection for multi-phase combusion systems |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59195012A (en) * | 1983-04-20 | 1984-11-06 | Hitachi Ltd | Combustion control method |
CS236689A2 (en) * | 1989-04-17 | 1991-09-15 | Poludniowy Okreg Energetycny K | Method of combustion process automatic optimization in heating installations and equipment for this method realization |
US5790420A (en) * | 1989-12-14 | 1998-08-04 | Lang; Fred D. | Methods and systems for improving thermal efficiency, determining effluent flows and for determining fuel mass flow rates of a fossil fuel fired system |
US7865271B2 (en) * | 2006-11-02 | 2011-01-04 | General Electric Company | Methods and systems to increase efficiency and reduce fouling in coal-fired power plants |
-
2008
- 2008-12-22 EP EP08172545A patent/EP2199679A1/en not_active Withdrawn
-
2009
- 2009-12-21 ES ES09799346T patent/ES2530677T3/en active Active
- 2009-12-21 US US13/141,109 patent/US20120058438A1/en not_active Abandoned
- 2009-12-21 CN CN200980151076.1A patent/CN102257325B/en active Active
- 2009-12-21 EP EP09799346.3A patent/EP2368071B1/en active Active
- 2009-12-21 WO PCT/EP2009/067627 patent/WO2010072708A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4305645A1 (en) * | 1993-02-24 | 1994-08-25 | Rwe Entsorgung Ag | Procedure for the determination of characteristic properties of radical forming processes |
DE19509412A1 (en) * | 1995-03-15 | 1996-10-02 | Siemens Ag | Method and device for controlling the firing of a steam generator system |
US7058617B1 (en) * | 1996-05-06 | 2006-06-06 | Pavilion Technologies, Inc. | Method and apparatus for training a system model with gain constraints |
WO1999039137A1 (en) * | 1998-01-30 | 1999-08-05 | Siemens Aktiengesellschaft | Method and device for operating an incinerator plant |
US20060176486A1 (en) * | 2005-02-08 | 2006-08-10 | General Electric Company | Method and apparatus for optical detection for multi-phase combusion systems |
Also Published As
Publication number | Publication date |
---|---|
US20120058438A1 (en) | 2012-03-08 |
EP2368071B1 (en) | 2015-01-28 |
CN102257325B (en) | 2016-03-23 |
EP2199679A1 (en) | 2010-06-23 |
EP2368071A1 (en) | 2011-09-28 |
ES2530677T3 (en) | 2015-03-04 |
CN102257325A (en) | 2011-11-23 |
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