EP1309822B1 - Control method for gas burners - Google Patents

Control method for gas burners Download PDF

Info

Publication number
EP1309822B1
EP1309822B1 EP01971911A EP01971911A EP1309822B1 EP 1309822 B1 EP1309822 B1 EP 1309822B1 EP 01971911 A EP01971911 A EP 01971911A EP 01971911 A EP01971911 A EP 01971911A EP 1309822 B1 EP1309822 B1 EP 1309822B1
Authority
EP
European Patent Office
Prior art keywords
gas
ionization signal
burner
air mixture
control method
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
EP01971911A
Other languages
German (de)
French (fr)
Other versions
EP1309822A1 (en
Inventor
Enno J. Vrolijk
Derk Vegter
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
Priority to DK01971911T priority Critical patent/DK1309822T3/en
Publication of EP1309822A1 publication Critical patent/EP1309822A1/en
Application granted granted Critical
Publication of EP1309822B1 publication Critical patent/EP1309822B1/en
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
    • 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
    • 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
    • F23N2227/00—Ignition or checking
    • F23N2227/20—Calibrating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/12—Flame sensors with flame rectification current detecting means

Definitions

  • the invention relates to a control method for gas burners according to the preamble of Claim 1.
  • Control methods for gas burners serve to provide a gas / air mixture, that is, supplying a gas flow and a combustion air flow to a burner.
  • the ratio between the gas flow and the combustion air flow and the gas pressure and the combustion air pressure is called the gear ratio.
  • the quality of the gas supplied by the gas supply - the quality of Gas is defined by a so-called Wobbe index - fluctuates, must to Ensuring optimum and complete combustion of the gas / air mixture in Depending on the quality of the gas can be varied accordingly.
  • the ionization signal is adjusted over the entire operating range of the burner the gas / air mixture used to different Gasquälticianen.
  • the ionization signal At low Operating loads of the burner, the ionization signal, however, strong external influences dependent and therefore provides no reliable information about the actually in the burner prevailing combustion conditions.
  • the regulatory procedure according to the state of Technology therefore lead to an unstable and therefore insufficient regulation.
  • EP 0 962 703 A2 is a control method disclosed for gas burners. In this regulatory procedure will in an area near the burner full load operation Ionisation signal of a sensor for setting a Translation ratio used. Outside the range of burner full load operation, the gas / air mixture in Dependent on this translation ratio.
  • the present invention is based on the problem, a to provide improved control method for gas burners. According to the invention Problem solved by a control method with the features of claim 1.
  • the control method for gas burners involves the provision of a gas / air mixture for a burner.
  • the burner is a gas stream and a Supplied combustion air flow.
  • the ratio between gas flow and Combustion air flow or the ratio between gas pressure and combustion stage pressure is called the gear ratio.
  • the ionization signal is used exclusively for setting the Gear ratio used depending on the gas quality, if the Burner flame completely covers the ionization signal generating sensor.
  • This inventive feature is based on the idea that only during this Operating state or operating state of the burner, the ionization signal a reliable Statement about the combustion process supplies.
  • the condition as to whether the burner flame is the sensor generating the ionization signal completely swept or not, may e.g. with an additional optical Flame monitoring device to be checked.

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)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

The invention relates to a control method for gas burners for providing a gas-air mixture. According to the invention, the ionization signal is only used for setting the mixing ratio dependent on the gas quality when the burner flame completely sweeps over the sensor generating the ionization signal. Outside the above-mentioned range, i.e. when the burner flame does not completely sweep over the sensor generating the ionization signal, the gas-air mixture is controlled dependent on the previously determined mixing ratio.

Description

Die Erfindung betrifft eine Regelungsverfahren für Gasbrenner gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a control method for gas burners according to the preamble of Claim 1.

Regelungsverfahren für Gasbrenner dienen der Bereitstellung eines Gas/Luft-Gemisches, also dem Zuführen eines Gasstroms und eines Verbrennungsluftstroms zu einem Brenner.Control methods for gas burners serve to provide a gas / air mixture, that is, supplying a gas flow and a combustion air flow to a burner.

Um innerhalb des Gasbrenners für eine optimale und vollständige Verbrennung des Brennstoffs, nämlich des Gases, zu sorgen, muß der Gasbrenner mit einem entsprechend abgestimmten Gas/Luft-Gemisch versorgt werden. Das Verhältnis zwischen dem Gasstrom und dem Verbrennungsluftstrom bzw. dem Gasdruck und dem Verbrennungsluftdruck bezeichnet man als Übersetzungsverhältnis.To within the gas burner for optimal and complete combustion of the Fuel, namely the gas to ensure the gas burner with a corresponding tuned gas / air mixture are supplied. The ratio between the gas flow and the combustion air flow and the gas pressure and the combustion air pressure is called the gear ratio.

Da jedoch die Qualität des von der Gasversorgung bereitgestellten Gases - die Qualität von Gas wird durch einen sogenannten Wobbe-Index definiert - schwankt, muß zur Gewährleistung einer optimalen und vollständigen Verbrennung das Gas/Luft-Gemisch in Abhängigkeit von der Qualität des Gases entsprechend variiert werden.However, as the quality of the gas supplied by the gas supply - the quality of Gas is defined by a so-called Wobbe index - fluctuates, must to Ensuring optimum and complete combustion of the gas / air mixture in Depending on the quality of the gas can be varied accordingly.

Um die Qualität des bereitgestellten Gases berücksichtigen zu können, sind aus dem Stand der Technik Regelungsverfahren bekannt, bei denen ein Ionisationssignal eines Sensors, insbesondere einer in die Brennerflamme des Gasbrenners ragenden Meßelektrode, zur Anpassung des Gas/Luft-Gemisches an unterschiedliche Gasqualitäten verwendet wird. Diesbezüglich kann auf die DE-A-44 33 425, DE 39 37 290 A1 sowie DE 195 39 568 Clverwiesen werden.In order to be able to consider the quality of the provided gas, are out of the state the technology control method in which an ionization signal of a sensor, in particular a projecting into the burner flame of the gas burner measuring electrode, for Adjustment of the gas / air mixture to different gas qualities is used. In this regard, to DE-A-44 33 425, DE 39 37 290 A1 and DE 195 39 568 Cl.

Bei den bekannten, ein Ionisationssignal verwendenden Regelungsverfahren für Gasbrenner wird das Ionisationssignal über den gesamten Arbeitsbereich des Brenners zur Anpassung des Gas/Luft-Gemisches an unterschiedliche Gasquälitäten verwendet. Bei geringen Betriebslasten des Brenners ist das Ionisationssignal jedoch stark von Außeneinflüssen abhängig und liefert demzufolge keine verläßliche Auskunft über die tatsächlich im Brenner herrschenden Verbrennungsverhältnisse. Die Regelungsverfahren nach dem Stand der Technik führen demzufolge zu einer instabilen und damit unzureichenden Regelung. In the known control method for gas burners using an ionization signal the ionization signal is adjusted over the entire operating range of the burner the gas / air mixture used to different Gasquälitäten. At low Operating loads of the burner, the ionization signal, however, strong external influences dependent and therefore provides no reliable information about the actually in the burner prevailing combustion conditions. The regulatory procedure according to the state of Technology therefore lead to an unstable and therefore insufficient regulation.

In der Druckschrift EP 0 962 703 A2 ist ein Regelungsverfahren für Gasbrenner offenbart. Bei diesem Regelungsverfahren wird in einem Bereich in der Nähe des Brenner-Vollastbetriebs ein Ionisationssignal eines Sensors zur Einstellung eines Übersetzungsverhältnisses verwendet. Außerhalb des Bereichs des Brenner Volllast-Betriebs wird das Gas/Luft-Gemisch in Abhängigkeit dieses Übersetzungsverhältnisses geregelt. In the document EP 0 962 703 A2 is a control method disclosed for gas burners. In this regulatory procedure will in an area near the burner full load operation Ionisation signal of a sensor for setting a Translation ratio used. Outside the range of burner full load operation, the gas / air mixture in Dependent on this translation ratio.

Hiervon ausgehend liegt der vorliegenden Erfindung das Problem zugrunde, ein verbessertes Regelungsverfahren für Gasbrenner bereitzustellen. Erfindungsgemäß wird das Problem durch ein Regelungsverfahren mit den Merkmalen des Patentanspruchs 1 gelöst.On this basis, the present invention is based on the problem, a to provide improved control method for gas burners. According to the invention Problem solved by a control method with the features of claim 1.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus der Beschreibung.Preferred developments of the invention will become apparent from the Description.

Bei dem Regelungsverfahren für Gasbrenner geht es um die Bereitstellung eines Gas/Luft-Gemisches für einen Brenner. Hierzu wird dem Brenner ein Gasstrom und ein Verbrennungsluftstrom zugeführt. Das Verhältnis zwischen Gasstrom und Verbrennungsluftstrom bzw. das Verhältnis zwischen Gasdruck und Verbrennungstuftdruck bezeichnet man als Übersetzungsverhältnis.The control method for gas burners involves the provision of a gas / air mixture for a burner. For this purpose, the burner is a gas stream and a Supplied combustion air flow. The ratio between gas flow and Combustion air flow or the ratio between gas pressure and combustion stage pressure is called the gear ratio.

Mit Hilfe eines ein Ionisationssignal erzeugenden Sensors wird der Verbrennungsprozeß im Brenner überwacht. Aus dem Ionisationssignal können Informationen über den Verbrennungsprozeß und somit über die vorhandene Gasqualität gewonnen werden.With the help of an ionization signal generating sensor, the combustion process in Burner monitored. From the ionization signal information about the Combustion process and thus be obtained on the existing gas quality.

Erfindungsgemäß wird das Ionisationssignal ausschließlich dann zur Einstellung des Übersetzungsverhältnisses in Abhängigkeit der Gasqualität verwendet, wenn die Brennerflamme den das Ionisationssignal erzeugenden Sensor vollständig überstreicht. Diesem erfindungsgemäßen Merkmal liegt der Gedanke zugrunde, daß nur während dieses Arbeitszustands bzw. Betriebszustands des Brenners das Ionisationssignal eine zuverlässige Aussage über den Verbrennungsprozeß liefert.According to the invention, the ionization signal is used exclusively for setting the Gear ratio used depending on the gas quality, if the Burner flame completely covers the ionization signal generating sensor. This inventive feature is based on the idea that only during this Operating state or operating state of the burner, the ionization signal a reliable Statement about the combustion process supplies.

Außerhalb des obengenannten Bereichs, also wenn die Brennerflamme den das Ionisationssignal erzeugenden Sensor nicht vollständig überstreicht, wird das Gas/Luft-Gemisch in Abhängigkeit des zuvor bestimmten Übersetzungsverhältnisses geregelt.Outside the above range, so if the burner flame that the Ionization signal generating sensor is not completely swept, the gas / air mixture regulated depending on the previously determined transmission ratio.

Die Bedingung, ob die Brennerflamme den das Ionisationssignal erzeugenden Sensor vollständig überstreicht oder nicht, kann z.B. mit einer zusätzlichen optischen Flammenüberwachungs-Einrichtung überprüft werden.The condition as to whether the burner flame is the sensor generating the ionization signal completely swept or not, may e.g. with an additional optical Flame monitoring device to be checked.

Claims (1)

  1. Regulation method for gas burners for providing a gas/air mixture, specifically for supplying a gas flow and a combustion air flow to a burner, wherein an ionization signal of a sensor is used to adapt the gas/air mixture to different gas qualities,
    characterized in that
       the ionization signal is used for setting a transmission ratio only when the sensor generating the ionization signal is completely swept by the burner flame,
       outside this range, i.e. when the sensor generating the ionization signal is not completely swept by the burner flame, the gas/air mixture is regulated as a function of the previously determined transmission ratio.
EP01971911A 2000-08-16 2001-08-14 Control method for gas burners Expired - Lifetime EP1309822B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK01971911T DK1309822T3 (en) 2000-08-16 2001-08-14 Gas Burner Regulatory Procedure

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10040358 2000-08-16
DE10040358A DE10040358B4 (en) 2000-08-16 2000-08-16 Control method for gas burners
PCT/EP2001/009379 WO2002014744A1 (en) 2000-08-16 2001-08-14 Control method for gas burners

Publications (2)

Publication Number Publication Date
EP1309822A1 EP1309822A1 (en) 2003-05-14
EP1309822B1 true EP1309822B1 (en) 2005-06-01

Family

ID=7652846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01971911A Expired - Lifetime EP1309822B1 (en) 2000-08-16 2001-08-14 Control method for gas burners

Country Status (9)

Country Link
US (1) US7344373B2 (en)
EP (1) EP1309822B1 (en)
JP (1) JP2004513318A (en)
KR (1) KR20030020972A (en)
AT (1) ATE296993T1 (en)
CA (1) CA2419443C (en)
DE (2) DE10040358B4 (en)
ES (1) ES2241873T3 (en)
WO (1) WO2002014744A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10341543A1 (en) * 2003-09-09 2005-04-28 Honeywell Bv Control method for gas burners
DE102004055716C5 (en) * 2004-06-23 2010-02-11 Ebm-Papst Landshut Gmbh Method for controlling a firing device and firing device (electronic composite I)
ITPD20120030A1 (en) 2012-02-09 2013-08-10 Sit La Precisa S P A Con Socio Uni Co METHOD FOR THE CONTROL OF A BURNER OF A BOILER AND CONTROL SYSTEM OPERATING IN ACCORDANCE WITH THIS METHOD
US9249737B2 (en) * 2013-02-26 2016-02-02 General Electric Company Methods and apparatus for rapid sensing of fuel wobbe index

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2524614A1 (en) * 1982-04-02 1983-10-07 Radiotechnique Compelec METHOD USING THE RECTIFIER EFFECT OF A FLAME TO MONITOR THE MARK OF A BURNER, AND DEVICE FOR CARRYING OUT SAID METHOD
GB2159267B (en) * 1984-05-23 1987-12-16 Shell Int Research Burner with ignition device
FR2638819A1 (en) 1988-11-10 1990-05-11 Vaillant Sarl METHOD AND DEVICE FOR PREPARING A COMBUSTIBLE-AIR MIXTURE FOR COMBUSTION
US5049063A (en) * 1988-12-29 1991-09-17 Toyota Jidosha Kabushiki Kaisha Combustion control apparatus for burner
DE4433425C2 (en) 1994-09-20 1998-04-30 Stiebel Eltron Gmbh & Co Kg Control device for setting a gas-combustion air mixture in a gas burner
US5632614A (en) * 1995-07-07 1997-05-27 Atwood Industries , Inc. Gas fired appliance igntion and combustion monitoring system
DE59604283D1 (en) * 1995-10-25 2000-03-02 Stiebel Eltron Gmbh & Co Kg Method and circuit for regulating a gas burner
IT1283699B1 (en) * 1996-03-25 1998-04-30 Enrico Sebastiani ADJUSTMENT OF THE SPEED OF THE OUTLET OF THE AIR-GAS MIXTURE FROM THE FLAME OUTLETS OF GAS BURNERS
ATE202837T1 (en) * 1996-05-09 2001-07-15 Stiebel Eltron Gmbh & Co Kg METHOD FOR OPERATING A GAS BURNER
US5961314A (en) * 1997-05-06 1999-10-05 Rosemount Aerospace Inc. Apparatus for detecting flame conditions in combustion systems
DE19824523C2 (en) * 1998-06-02 2000-06-08 Honeywell Bv Control procedures for gas burners

Also Published As

Publication number Publication date
US7344373B2 (en) 2008-03-18
JP2004513318A (en) 2004-04-30
DE10040358A1 (en) 2002-03-07
ATE296993T1 (en) 2005-06-15
EP1309822A1 (en) 2003-05-14
KR20030020972A (en) 2003-03-10
ES2241873T3 (en) 2005-11-01
WO2002014744A1 (en) 2002-02-21
DE10040358B4 (en) 2006-03-30
CA2419443A1 (en) 2003-02-12
US20040096789A1 (en) 2004-05-20
CA2419443C (en) 2011-02-08
DE50106402D1 (en) 2005-07-07

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