EP1524470B1 - Procédé pour réguler un système thermodynamique - Google Patents

Procédé pour réguler un système thermodynamique Download PDF

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Publication number
EP1524470B1
EP1524470B1 EP03023303A EP03023303A EP1524470B1 EP 1524470 B1 EP1524470 B1 EP 1524470B1 EP 03023303 A EP03023303 A EP 03023303A EP 03023303 A EP03023303 A EP 03023303A EP 1524470 B1 EP1524470 B1 EP 1524470B1
Authority
EP
European Patent Office
Prior art keywords
spectrum
flame
characteristic value
burner
corresponds
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.)
Expired - Lifetime
Application number
EP03023303A
Other languages
German (de)
English (en)
Other versions
EP1524470A1 (fr
Inventor
Peter Richter
Franz Wintrich
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.)
Powitec Intelligent Technologies GmbH
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Powitec Intelligent Technologies GmbH
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 Powitec Intelligent Technologies GmbH filed Critical Powitec Intelligent Technologies GmbH
Priority to ES03023303T priority Critical patent/ES2358585T3/es
Priority to AT03023303T priority patent/ATE497128T1/de
Priority to EP03023303A priority patent/EP1524470B1/fr
Priority to DE50313441T priority patent/DE50313441D1/de
Priority to KR1020040082147A priority patent/KR101115758B1/ko
Publication of EP1524470A1 publication Critical patent/EP1524470A1/fr
Application granted granted Critical
Publication of EP1524470B1 publication Critical patent/EP1524470B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/20—Camera viewing

Definitions

  • the invention relates to a method for controlling a thermodynamic system, having the features of the preamble of claim 1.
  • each intended conveyor feeds the burner associated with it with an unknown distribution of the mass flows and the grain spectra of the coal serving as fuel, the unknown values making precise regulation very difficult.
  • a measuring device will deduce the presence of an image of the flame for the presence of the flame.
  • the US 4,913,647 A discloses a thermodynamic system in which a valve for the fuel is provided per flame, so that the distribution of the mass flows is known in principle or can be easily determined.
  • the evaluation of "regions of interest" within an image of a flame is described in the WO 02/070953 A1 described.
  • the present invention has for its object to improve a method of the type mentioned in terms of the amount of data. This object is achieved by a method having the features of claim 1. Further advantageous embodiments are the subject of the dependent claims.
  • the application can be made in various thermodynamic systems, such as power plants, regardless of the fuel and its state of aggregation.
  • the fuel may therefore be coal, oil or gas, for example.
  • a spectrum is determined from the detected time-dependent signal, for example with a fast Fourier transformation or another mathematical method, from which five characteristic values are then determined. From the characteristic values, the com spectrum and / or the distribution of the mass flows per burner of each conveyor will be determined by multiple regression or another mathematical method. It is preferably the best possible approach to a combination of known fuel particle spectra and / or distributions of the mass flows pr.o burners each conveyor (for example, mill or pump), which are to be retired for initialization, ie the current fuel particle spectrum and / or the current distribution of mass flows.
  • the fuel particle spectrum is a grain spectrum in the case of coal, and a droplet spectrum in the case of oil. In the case of gas, only the distribution of the mass flows is determined.
  • a suitable measuring device which is used in the method according to the invention and which receives an image of the flame, has at least one diode, which respectively captures exactly one region of interest from the image of the flame, that is, confines itself to a part of the image. This reduces the to be detected and amount of data to be processed. In several areas of interest, a corresponding number of diodes are provided.
  • the diode is preferably associated with an evaluation device, in particular its own evaluation device, which then preferably determines the spectrum and the characteristic values or the. The data volume to be forwarded is then minimal.
  • the main computer can also act as the evaluation device, in which case, however, a field with data from the measuring device to the main computer is to be transmitted, which is larger in comparison with the characteristic values.
  • a video camera is preferably provided, which is preferably selectively connectable to the measuring device. After adjustment, the video camera can be removed from the measuring device, which dampens the total cost of a larger system despite several measuring devices.
  • the diode and the video camera preferably use the same optical access, for example a common borescope, to which a beam splitter is connected.
  • a corresponding thermodynamic system which is controlled by the method according to the invention, has at least one measuring device except for a furnace and at least one conveyor, in particular a mill or pump, which are assigned to at least two burners, but preferably a measuring device for each burner.
  • the fuel for a power plant is preferably coal, but other, especially solid fuels can be used, also as an admixture.
  • a power plant 1 which is an example of a thermodynamic plant
  • several bunkers 3 are provided with coarse-shaped coal concentrate, medium grain and fine grain, from which a mill 5 is charged as a conveyor.
  • a mill 5 is charged as a conveyor.
  • another fuel could be used or added.
  • the coal K discharged from the mill 5 is fed together with the primary air L P to a burner 7 in a furnace 9, each mill 5, for reasons of cost, feeding several burners 7, for example two in the drawing. At each burner 7 then forms a flame 11 in the furnace 9. Below the burner 7, the secondary air L s is blown into the furnace 9.
  • Each flame 11 is detected optically by a measuring device 15, which has a borescope 17 projecting into the oven 9, which images an image of the flame 11 into the interior of the measuring device 15.
  • a beam splitter 19 By means of a beam splitter 19, the image of the flame 11 is directed on the one hand to a selectively connected to the measuring device 15 video camera 21 and on the other hand to a diode 23, which with a sampling frequency of, for example, up to 2 kHz - and optionally adjusted spectral sensitivity - a wedding or Optionally receives high-definition signal.
  • the video camera 21 can be removed and used for the adjustment of another measuring device 15.
  • the diode 23 preferably outputs the received signal to its own evaluation device 25, which carries out a subsequently described evaluation and forwards the result to a computer 31.
  • This computer 31 is used to control the power plant 1, i. due to the results supplied by the measuring devices 15, different manipulated variables are actuated to achieve an optimization target, for example minimal emission of nitrogen oxides, for example, the coal mixture and quality fed to the mill 5, which have an influence on the grain spectrum of each burner 7, the amount of coal and the Amount of primary air and secondary air. Since different burners 7 are assigned to each mill 5, the effective manipulated variables are not all known.
  • the recorded time-dependent signal is subjected to a fast Fourier transform and a Spectrum up to about 1000 Hz obtained (sampling theorem).
  • the spectrum has an exponential decrease of intensity I in a range of about 100 to 1000 Hz and can be described in good approximation by five characteristic values.
  • An initial departure from known grain spectra and known coal mass flow distributions serves the initialization and determination of the absolute values. From a multiple regression or other approximation process with the said five values from all burners 7 over time, a best approximation to a combination of known grain spectra and known coal mass flows can be achieved, from which the quantities desired for control are determined.

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)
  • Control Of Combustion (AREA)
  • Confectionery (AREA)

Claims (3)

  1. Procédé pour régler une installation thermodynamique (1), selon lequel au moins un dispositif de transport (5) alimente en combustible à chaque fois au moins deux brûleurs (7) qui lui sont attribués et l'image d'une flamme (11) se formant est saisie et traitée sur chaque brûleur (7) présent, au moins une zone intéressante à la base de la flamme dans la zone proche du brûleur (7) étant choisie par l'image de la flamme (11) et son intensité (I) étant enregistrée comme signal dépendant du temps et étant utilisée pour le réglage, caractérisé par le fait qu'un spectre et à partir de là des valeurs caractéristiques (M1, M2, M3, M4, M5) sont déterminés à partir du signal enregistré dépendant du temps, valeurs à partir desquelles le spectre granulométrique et/ou la répartition des flux massiques sont déterminés, par une régression ou par un autre procédé mathématique, par brûleur (7) de chaque dispositif de transport (5), l'intensité (I) à la fréquence f = 0 étant la première valeur caractéristique (M1) dans le spectre et, en ce qui concerne la zone d'une chute d'intensité du spectre, une valeur de fréquence moyenne étant la seconde valeur caractéristique (M2), la position et la largeur de cette zone, la troisième valeur caractéristique (M3), le coefficient de régression, la quatrième valeur caractéristique (M4) et la dispersion la cinquième valeur caractéristique (M5).
  2. Procédé selon la revendication 1, caractérisé par le fait qu'un examen initial de spectres granulométriques connus et d'une répartition connue des flux massiques servent à l'initialisation et à la détermination des valeurs absolues.
  3. Procédé selon la revendication 2, caractérisé par le fait qu'une approche d'une combinaison des spectres granulométriques connus et de la répartition connue des flux massiques est obtenue à partir des valeurs caractéristiques (M1, M2, M3, M4, M5) de tous les brûleurs (7) par rapport au temps.
EP03023303A 2003-10-15 2003-10-15 Procédé pour réguler un système thermodynamique Expired - Lifetime EP1524470B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES03023303T ES2358585T3 (es) 2003-10-15 2003-10-15 Procedimiento para la regulación de una instalación termodinámica.
AT03023303T ATE497128T1 (de) 2003-10-15 2003-10-15 Verfahren zur regelung einer thermodynamischen anlage
EP03023303A EP1524470B1 (fr) 2003-10-15 2003-10-15 Procédé pour réguler un système thermodynamique
DE50313441T DE50313441D1 (de) 2003-10-15 2003-10-15 Verfahren zur regelung einer thermodynamischen anlage
KR1020040082147A KR101115758B1 (ko) 2003-10-15 2004-10-14 열역학적 시스템 제어 방법

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03023303A EP1524470B1 (fr) 2003-10-15 2003-10-15 Procédé pour réguler un système thermodynamique

Publications (2)

Publication Number Publication Date
EP1524470A1 EP1524470A1 (fr) 2005-04-20
EP1524470B1 true EP1524470B1 (fr) 2011-01-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03023303A Expired - Lifetime EP1524470B1 (fr) 2003-10-15 2003-10-15 Procédé pour réguler un système thermodynamique

Country Status (5)

Country Link
EP (1) EP1524470B1 (fr)
KR (1) KR101115758B1 (fr)
AT (1) ATE497128T1 (fr)
DE (1) DE50313441D1 (fr)
ES (1) ES2358585T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2313488T3 (es) 2006-04-25 2009-03-01 Powitec Intelligent Technologies Gmbh Procedimiento y bucle de regulacion para regular un proceso de combustion.
CN108445746B (zh) * 2018-01-25 2020-12-29 北京农业信息技术研究中心 一种智能投喂控制方法及装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3024401A1 (de) * 1980-06-28 1982-01-28 Steag Ag, 4300 Essen Verfahren zur gesteuerten verbrennung von festen fossilen brennstoffen, insbesondere kohlestaub
US4913647A (en) * 1986-03-19 1990-04-03 Honeywell Inc. Air fuel ratio control
DE10143548A1 (de) * 2001-06-13 2003-01-02 Powitec Intelligent Tech Gmbh Meßvorrichtung, insbesondere zur Flammenbeobachtung während eines Verbrennungsprozesses
ATE293232T1 (de) * 2001-03-02 2005-04-15 Powitec Intelligent Tech Gmbh Messvorrichtung, insbesondere zur flammenbeobachtung während eines verbrennungsprozesses

Also Published As

Publication number Publication date
ES2358585T3 (es) 2011-05-12
DE50313441D1 (de) 2011-03-10
KR101115758B1 (ko) 2012-03-06
KR20050036777A (ko) 2005-04-20
ATE497128T1 (de) 2011-02-15
EP1524470A1 (fr) 2005-04-20

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