EP2368071A1 - Procédé et dispositif d'optimisation de la combustion dans une centrale - Google Patents

Procédé et dispositif d'optimisation de la combustion dans une centrale

Info

Publication number
EP2368071A1
EP2368071A1 EP09799346A EP09799346A EP2368071A1 EP 2368071 A1 EP2368071 A1 EP 2368071A1 EP 09799346 A EP09799346 A EP 09799346A EP 09799346 A EP09799346 A EP 09799346A EP 2368071 A1 EP2368071 A1 EP 2368071A1
Authority
EP
European Patent Office
Prior art keywords
combustion
real
distribution
combustion chamber
dimension
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09799346A
Other languages
German (de)
English (en)
Other versions
EP2368071B1 (fr
Inventor
Bernhard Meerbeck
Rainer Speh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP09799346.3A priority Critical patent/EP2368071B1/fr
Publication of EP2368071A1 publication Critical patent/EP2368071A1/fr
Application granted granted Critical
Publication of EP2368071B1 publication Critical patent/EP2368071B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Radiation Pyrometers (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'optimisation de la combustion de combustible dans une chambre de combustion d'une centrale. Une distribution réelle de la concentration d'une substance et/ou une distribution réelle de la température est mesurée dans la chambre de combustion dans au moins une dimension. La distribution réelle de la concentration et/ou de la température est analysée et la combustion du combustible est pilotée de manière à obtenir une distribution symétrique de la concentration et/ou de la température dans ladite au moins une dimension. Dans l'analyse, on détermine au moins un indice de symétrie de la distribution réelle de la concentration et/ou de la température et dans la commande, on modifie au moins un paramètre de commande en fonction dudit au moins un indice.
EP09799346.3A 2008-12-22 2009-12-21 Procédé et dispositif d'optimisation de la combustion dans une centrale Active EP2368071B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09799346.3A EP2368071B1 (fr) 2008-12-22 2009-12-21 Procédé et dispositif d'optimisation de la combustion dans une centrale

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08172545A EP2199679A1 (fr) 2008-12-22 2008-12-22 Procédé et dispositif d'optimisation de la combustion dans une centrale
EP09799346.3A EP2368071B1 (fr) 2008-12-22 2009-12-21 Procédé et dispositif d'optimisation de la combustion dans une centrale
PCT/EP2009/067627 WO2010072708A1 (fr) 2008-12-22 2009-12-21 Procédé et dispositif d'optimisation de la combustion dans une centrale

Publications (2)

Publication Number Publication Date
EP2368071A1 true EP2368071A1 (fr) 2011-09-28
EP2368071B1 EP2368071B1 (fr) 2015-01-28

Family

ID=40822953

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08172545A Withdrawn EP2199679A1 (fr) 2008-12-22 2008-12-22 Procédé et dispositif d'optimisation de la combustion dans une centrale
EP09799346.3A Active EP2368071B1 (fr) 2008-12-22 2009-12-21 Procédé et dispositif d'optimisation de la combustion dans une centrale

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08172545A Withdrawn EP2199679A1 (fr) 2008-12-22 2008-12-22 Procédé et dispositif d'optimisation de la combustion dans une centrale

Country Status (5)

Country Link
US (1) US20120058438A1 (fr)
EP (2) EP2199679A1 (fr)
CN (1) CN102257325B (fr)
ES (1) ES2530677T3 (fr)
WO (1) WO2010072708A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102032590B (zh) * 2010-12-31 2012-01-11 北京华电天仁电力控制技术有限公司 基于精确测量系统的锅炉燃烧优化控制系统和优化控制方法
CN105444201B (zh) * 2014-09-26 2018-11-13 通用电气公司 燃烧优化的方法及其系统

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59195012A (ja) * 1983-04-20 1984-11-06 Hitachi Ltd 燃焼制御方法
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
DE4305645C2 (de) * 1993-02-24 1996-10-02 Rwe Entsorgung Ag Verfahren zur Ermittlung charakteristischer Eigenschaften von Radikale bildenden Prozessen, Verwendung des Verfahrens und Vorrichtung zur Durchführung des Verfahrens
DE19509412C2 (de) * 1995-03-15 1997-01-30 Siemens Ag Verfahren und Vorrichtung zur Feuerungsregelung einer Dampferzeugeranlage
US7058617B1 (en) * 1996-05-06 2006-06-06 Pavilion Technologies, Inc. Method and apparatus for training a system model with gain constraints
DE59903735D1 (de) * 1998-01-30 2003-01-23 Siemens Ag Verfahren und vorrichtung zum betreiben einer verbrennungsanlage
US7324203B2 (en) * 2005-02-08 2008-01-29 General Electric Company Method and apparatus for optical detection for multi-phase combustion systems
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010072708A1 *

Also Published As

Publication number Publication date
CN102257325A (zh) 2011-11-23
EP2368071B1 (fr) 2015-01-28
US20120058438A1 (en) 2012-03-08
WO2010072708A1 (fr) 2010-07-01
ES2530677T3 (es) 2015-03-04
CN102257325B (zh) 2016-03-23
EP2199679A1 (fr) 2010-06-23

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