EP1215440B1 - Procédé pour commander des brûleurs - Google Patents

Procédé pour commander des brûleurs Download PDF

Info

Publication number
EP1215440B1
EP1215440B1 EP01129735A EP01129735A EP1215440B1 EP 1215440 B1 EP1215440 B1 EP 1215440B1 EP 01129735 A EP01129735 A EP 01129735A EP 01129735 A EP01129735 A EP 01129735A EP 1215440 B1 EP1215440 B1 EP 1215440B1
Authority
EP
European Patent Office
Prior art keywords
burner
rise
gas
rate
ionization signal
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
EP01129735A
Other languages
German (de)
English (en)
Other versions
EP1215440A2 (fr
EP1215440A3 (fr
Inventor
Piet Blaauwwiekel
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.)
Garrett Motion SARL
Original Assignee
Honeywell BV
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 Honeywell BV filed Critical Honeywell BV
Publication of EP1215440A2 publication Critical patent/EP1215440A2/fr
Publication of EP1215440A3 publication Critical patent/EP1215440A3/fr
Application granted granted Critical
Publication of EP1215440B1 publication Critical patent/EP1215440B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means

Definitions

  • the invention relates to a control method for gas burners according to the preamble of claim 1. Such a method is already known from document DE-A-19 824 523.
  • Control methods for gas burners serve to provide a gas / air mixture, that is, to supply a gas flow and a combustion air flow to a burner.
  • the gas burner In order to ensure optimal and complete combustion of the fuel, namely the gas, within the gas burner, the gas burner must be supplied with a correspondingly matched gas / air mixture.
  • the ratio between the gas flow and the combustion air flow or the gas pressure and the combustion air pressure is referred to as a gear ratio.
  • the quality of the gas supplied by the gas supply - the quality of gas is defined by a so-called Wobbe index - varies, the gas / air mixture must be varied according to the quality of the gas to ensure optimum and complete combustion ,
  • control technology is known from Star.d of the art in which an ionization signal of a sensor, in particular a measuring electrode projecting into the burner flame of the gas burner, is used to adapt the gas / air mixture to different gas qualities becomes.
  • an ionization signal of a sensor in particular a measuring electrode projecting into the burner flame of the gas burner
  • the ionization signal is used over the entire operating range or operating range of the burner for adapting the gas / air mixture to different gas qualities.
  • the ionization signal is highly dependent on external influences and therefore provides no reliable information about the actual combustion conditions prevailing in the burner. Consequently, these regulatory procedures lead to an unstable and thus inadequate regulation.
  • the present invention is based on the problem to provide an improved control method for gas burners. According to the invention, the problem is solved by a control method having the features of patent claim 1.
  • the control method for gas burners involves the provision of a gas / air mixture for a burner.
  • a gas stream and a combustion air stream is supplied to the burner.
  • the ratio between gas flow and combustion air flow or the ratio between gas pressure and combustion air pressure is called the gear ratio.
  • the combustion process in the burner is monitored.
  • Information about the combustion process and thus about the existing gas quality can be obtained from the ionization signal.
  • the ionization signal is used exclusively in an area near a burner full load operation for setting the gear ratio depending on the gas quality. This range is preferably between 70% and 100% of the burner full load operation, but may also be between 60% and 100% of the burner full load operation. Outside the above-mentioned range, the gas / air mixture is regulated depending on the previously determined gear ratio.
  • the burner is driven with, in particular, 70% to 100% of the burner full load operation and during this operation, a transmission ratio taking into account the existing gas quality is determined with the aid of an ionization signal.
  • the gas / air mixture is regulated while maintaining the last determined transmission ratio.
  • the transmission ratio set during the burner full-load operation does not permit exact control since e.g. the gas quality may have changed.
  • a reference slew rate for the ionization signal is determined.
  • This reference slew rate is determined and stored for a burner with predetermined burner conditions, in particular at a predetermined temperature and standstill time of the burner.
  • the current rate of increase of the ionization signal is measured, namely, when the burner at start due to a heat request, the predetermined burner conditions.
  • This measured slew rate is compared with the reference slew rate, and when the measured slew rate deviates from the reference slew rate by a predetermined amount, a new gear ratio is set.
  • the burner is operated in the vicinity of a burner full load operation.
  • a service indicator may be activated to indicate the change to an operator.
  • the above method can be further improved by defining a reference start of the burner from certain burner conditions.
  • the invention relates to a control method for gas burners for providing a gas / air mixture.
  • the rate of rise of the ionization signal is measured when starting the burner. This measured slew rate is compared with a reference slew rate for the ionization signal, and when the measured slew rate deviates from the reference slew rate by a predetermined amount, a new gear ratio is set.

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)
  • Gas Burners (AREA)

Claims (6)

  1. Procédé de régulation pour brûleur à gaz en vue de fournir un mélange gaz/air, c'est-à-dire d'amener un courant de gaz et un courant d'air de combustion dans un brûleur, selon lequel un signal d'ionisation d'un capteur est utilisé pour adapter le mélange gaz/air à des qualités de gaz différentes, le signal d'ionisation n'est utilisé pour régler un rapport de transformation que dans une zone de charge proche d'un fonctionnement de pleine charge du brûleur, et en dehors de cette zone de pleine charge, le mélange gaz/air est régulé en fonction de ce rapport de transformation, caractérisé en ce que
    a) lors du démarrage du brûleur, la vitesse de montée du signal d'ionisation est mesurée,
    b) la vitesse de montée mesurée est comparée à une vitesse de montée de référence pour le signal d'ionisation,
    c) si la vitesse de montée mesurée est différente de la vitesse de montée de référence suivant une valeur prédéfinie, un nouveau rapport de transmission est réglé.
  2. Procédé de régulation pour brûleur à gaz selon la revendication 1, caractérisé en ce que la vitesse de montée de référence est recherchée et mise en mémoire pour un brûleur avec des conditions de brûleur prédéfinies, notamment pour une température et un temps d'arrêt du brûleur prédéfinis.
  3. Procédé de régulation pour brûleur à gaz selon la revendication 1 ou 2, caractérisé en ce que si le brûleur, en démarrant, présente en raison d'une demande de chaleur les conditions de brûleur prédéfinies, la vitesse de montée est mesurée et comparée à une vitesse de montée de référence.
  4. Procédé de régulation pour brûleur à gaz selon l'une au moins des revendications 1 à 3, caractérisé en ce que si la vitesse de montée mesurée est différente de la vitesse de montée de référence suivant une valeur prédéfinie, le brûleur fonctionne près d'un fonctionnement à pleine charge en vue de régler un nouveau rapport de transformation.
  5. Procédé de régulation pour brûleur à gaz selon l'une au moins des revendications 1 à 3, caractérisé en ce que si la vitesse de montée mesurée est différente de la vitesse de montée de référence suivant une valeur prédéfinie et si le brûleur ne peut pas fonctionner près d'un fonctionnement à pleine charge en vue de régler un nouveau rapport de transformation, un affichage de maintenance est activé.
  6. Procédé de régulation pour brûleur à gaz selon l'une au moins des revendications 1 à 5, caractérisé en ce que le signal d'ionisation est utilisé dans une plage de 70 % à 100 % du fonctionnement à pleine charge de brûleur en vue de régler le rapport de transformation.
EP01129735A 2000-12-15 2001-12-13 Procédé pour commander des brûleurs Expired - Lifetime EP1215440B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10062844 2000-12-15
DE10062844A DE10062844B4 (de) 2000-12-15 2000-12-15 Regelungsverfahren für Gasbrenner

Publications (3)

Publication Number Publication Date
EP1215440A2 EP1215440A2 (fr) 2002-06-19
EP1215440A3 EP1215440A3 (fr) 2004-06-30
EP1215440B1 true EP1215440B1 (fr) 2006-06-14

Family

ID=7667481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01129735A Expired - Lifetime EP1215440B1 (fr) 2000-12-15 2001-12-13 Procédé pour commander des brûleurs

Country Status (5)

Country Link
EP (1) EP1215440B1 (fr)
AT (1) ATE330180T1 (fr)
DE (2) DE10062844B4 (fr)
DK (1) DK1215440T3 (fr)
ES (1) ES2266080T3 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2638819A1 (fr) 1988-11-10 1990-05-11 Vaillant Sarl Procede et un dispositif pour la preparation d'un melange combustible-air destine a une combustion
DE4433425C2 (de) 1994-09-20 1998-04-30 Stiebel Eltron Gmbh & Co Kg Regeleinrichtung zum Einstellen eines Gas-Verbrennungsluft-Gemisches bei einem Gasbrenner
DE19539568C1 (de) 1995-10-25 1997-06-19 Stiebel Eltron Gmbh & Co Kg Verfahren und Schaltung zur Regelung eines Gasbrenners
DE19824523C2 (de) * 1998-06-02 2000-06-08 Honeywell Bv Regelungsverfahren für Gasbrenner
DE19831648B4 (de) * 1998-07-15 2004-12-23 Stiebel Eltron Gmbh & Co. Kg Verfahren zur funktionalen Adaption einer Regelelektronik an ein Gasheizgerät

Also Published As

Publication number Publication date
EP1215440A2 (fr) 2002-06-19
ES2266080T3 (es) 2007-03-01
DE10062844A1 (de) 2002-07-11
DK1215440T3 (da) 2006-09-04
DE10062844B4 (de) 2005-12-15
ATE330180T1 (de) 2006-07-15
EP1215440A3 (fr) 2004-06-30
DE50110141D1 (de) 2006-07-27

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