EP4119844A1 - Dispositif brûleur et procédé permettant de faire fonctionner un dispositif brûleur - Google Patents

Dispositif brûleur et procédé permettant de faire fonctionner un dispositif brûleur Download PDF

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Publication number
EP4119844A1
EP4119844A1 EP22183499.7A EP22183499A EP4119844A1 EP 4119844 A1 EP4119844 A1 EP 4119844A1 EP 22183499 A EP22183499 A EP 22183499A EP 4119844 A1 EP4119844 A1 EP 4119844A1
Authority
EP
European Patent Office
Prior art keywords
monitoring electrode
flame
evaluation device
voltage source
burner
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.)
Pending
Application number
EP22183499.7A
Other languages
German (de)
English (en)
Inventor
Eugen Gleim
Andreas Muhlack
Martin Ries
Sven Stutzmann
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.)
Viessmann Climate Solutions SE
Original Assignee
Viessmann Climate Solutions SE
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 Viessmann Climate Solutions SE filed Critical Viessmann Climate Solutions SE
Publication of EP4119844A1 publication Critical patent/EP4119844A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • 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
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/9901—Combustion process using hydrogen, hydrogen peroxide water or brown gas as fuel

Definitions

  • the invention relates to a burner device according to the preamble of patent claim 1 and a method for operating a burner device according to the preamble of patent claim 8.
  • a burner device of the type mentioned is from the patent document DE 10 2004 059 494 A1 known.
  • This burner device consists of a burner for burning a hydrogen-containing gas mixture to form a flame and a monitoring electrode assigned to the flame with an electronic evaluation device (see there in particular paragraph [0036]).
  • This solution is a so-called reformer burner, as used in the operation of fuel cells. In this case, hydrogen-rich reformate of the fuel cell can also be fed to the burner.
  • a gas mixture is to be understood as meaning a mixture that consists at least of hydrogen and air.
  • the gas mixture can also contain, for example, methane gas or the like.
  • the mixture of hydrogen and another combustible gas such as methane gas or the like is called here and hereinafter combustible gas mixture. Together with the air, it forms the said gas mixture.
  • the object of the invention is to provide a burner device and a method for operating a burner device to improve the type mentioned above.
  • a burner device and a method for operating a burner device are to be created with which gas mixtures that at least largely or also consist solely of air and hydrogen can be burned safely.
  • the monitoring electrode is designed to be electrically connected to a DC voltage source and to a measuring resistor monitored by the electronic evaluation device.
  • the monitoring electrode is subjected to electrical voltage using a DC voltage source and is monitored using a measuring resistor which is electrically connected to the electronic evaluation device.
  • the burner device according to the invention and the method according to the invention are characterized in that instead of an AC voltage source, a DC voltage source and a measuring resistor are provided for flame monitoring. It was surprisingly found that a flame containing hydrogen or reaction products of hydrogen behaves like a classic (ohmic) electrical resistance and accordingly with the help of a simple Measuring resistor, also called shunt, can be monitored. In the aforementioned prior art, on the other hand, so-called ionization current monitoring, which is typical for burners, takes place, but this does not work due to the lack of a rectifying effect of hydrogen in burners for burning high proportions of hydrogen.
  • the direct current source, the measuring resistor and the monitoring electrode are electrically connected in series, which will be discussed in more detail below.
  • the burner device shown in the single figure initially consists in a known manner of a burner 1 for burning a hydrogen-containing gas mixture to form a flame and a monitoring electrode 2 assigned to the flame with an electronic evaluation device 3.
  • a burner 1 is used to generate a hydrogen containing gas mixture is burned to form a flame and the flame is monitored with one of these associated monitoring electrode 2 with an electronic evaluation device 3.
  • the monitoring electrode 2 is electrically connected to a DC voltage source 4 and to a measuring resistor 5 monitored by the electronic evaluation device 3 .
  • Procedurally expressed is essential for the solution according to the invention that the monitoring electrode 2 is set with a DC voltage source 4 under electrical voltage and with an electrically connected to the electronic evaluation device 3 associated measuring resistor 5 is monitored.
  • a fuel gas mixture consisting of hydrogen and another combustible gas (unlike the aforementioned gas mixture).
  • a proportion of hydrogen in the fuel gas mixture of at least 20% by volume, preferably at least 50% by volume, very particularly preferably at least 95% by volume or such a fuel gas mixture is used.
  • the burner device according to the invention and the method according to the invention for operating a burner device is also, as already explained above, provided in particular for burning gas mixtures that consist at least largely or solely of air and hydrogen as completely as possible.
  • the above stipulation that the gas mixture is formed from (the) air and the combustible gas mixture continues to apply, in which case (again striving for as complete combustion as possible) the aforementioned stipulation "to a large extent" means that the gas mixture is at least 60% by volume. consists of air and hydrogen, preferably at least 75% by volume of air and hydrogen, particularly preferably 97% by volume of air and hydrogen.
  • the burner device provision is also preferably made (cf. FIG. 1) for the DC voltage source 4, the measuring resistor 5 and the monitoring electrode 2 to be electrically connected in series.
  • the evaluation device 3 is electrically connected on the one hand to a first electrical connection 3.1 between the DC voltage source 4 and the measuring resistor 5 and on the other hand to a second electrical connection 3.2 between the measuring resistor 5 and the monitoring electrode 2.
  • the measuring resistor 5 has an electrical (total) resistance of between 3 to 7 M ⁇ , preferably 4 to 6 M ⁇ , particularly preferably 5 M ⁇ .
  • the measuring resistor 5 is particularly preferably formed from at least two partial resistors. Since different gas compositions can lead to very different resistance characteristics, it is further particularly preferred that the electrical resistance of one partial resistance is at least five hundred times greater than the electrical resistance of the other partial resistance.
  • the monitoring electrode 2 is arranged outside a reaction area of the flame, preferably at a distance of between 1 and 4 cm, particularly preferably at a distance of between 2 and 3 cm, from the reaction area of the flame.
  • the evaluation device 3 measures a voltage drop across the measuring resistor 5 . It is preferred that a current coming from the DC voltage source 4 is calculated from the voltage drop. It is also preferred that from the voltage drop An electrical resistance between the monitoring electrode 2 and an electrical reference point 6, preferably an electrical ground, is determined at the measuring resistor 5 and the current coming from the DC voltage source 4.
  • the evaluation device 3 it is preferable for the evaluation device 3 to evaluate an amount of the determined electrical resistance between the monitoring electrode 2 and the electrical reference point 6 below a predetermined value as an indication of the presence of the flame.
  • the evaluation device 3 shows an amount of the determined electrical resistance between the monitoring electrode 2 and the electrical reference point 6 in the M ⁇ range (more precisely: in the range from 1 to 999 M ⁇ ) as an indication of the presence of the flame and in the G ⁇ -Range (more precisely: in the range from 1 to 999 G ⁇ ) is evaluated as an indication of the absence of the flame.
  • the evaluation device 3 evaluates an amount of the determined electrical resistance between the monitoring electrode 2 and the electrical reference point 6 in the range from 500 to 999 k ⁇ as an indication of a flame arising from a hydrogen-free gas mixture. In addition, it is preferable for the evaluation device 3 to use an amount of the determined electrical resistance between the monitoring electrode 2 and the electrical reference point 6 in the range of up to 499 k ⁇ , depending on the size of the series resistances used in the evaluation device 3, as an indication of a short circuit between the monitoring electrode 2 and the electrical reference point 6 is evaluated.
  • the above-mentioned evaluation of the measured values for the amount of electrical resistance determined between the monitoring electrode 2 and the electrical reference point 6 is preferably output as an informational, preferably electronically processable signal from the evaluation device 3.
  • the monitoring electrode 2 is electrically charged at least temporarily and as an alternative to the DC voltage source 4 with an AC voltage source and monitored with the electronic evaluation device 3 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
EP22183499.7A 2021-07-16 2022-07-07 Dispositif brûleur et procédé permettant de faire fonctionner un dispositif brûleur Pending EP4119844A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021118406.1A DE102021118406A1 (de) 2021-07-16 2021-07-16 Brennervorrichtung und Verfahren zum Betrieb einer Brennervorrichtung

Publications (1)

Publication Number Publication Date
EP4119844A1 true EP4119844A1 (fr) 2023-01-18

Family

ID=82399557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22183499.7A Pending EP4119844A1 (fr) 2021-07-16 2022-07-07 Dispositif brûleur et procédé permettant de faire fonctionner un dispositif brûleur

Country Status (2)

Country Link
EP (1) EP4119844A1 (fr)
DE (1) DE102021118406A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040174265A1 (en) * 2003-03-07 2004-09-09 Ranco Incorporated Of Delaware Flame sense circuit and method with analog output
DE102004059494A1 (de) 2004-12-10 2006-06-22 European Fuel Cell Gmbh Verfahren zur Bestimmung einer Luftzahl bei einem Brenner für ein Brennstoffzellenheizgerät sowie Brennstoffzellenheizgerät
DE102008059516A1 (de) * 2008-11-28 2010-06-02 Owi Oel-Waerme-Institut Ggmbh Verfahren zur Messung der Umsatzrate bzw. der Reaktionsgeschwindigkeit in Flammen
EP3279992A1 (fr) * 2015-03-30 2018-02-07 Panasonic Intellectual Property Management Co., Ltd. Système de pile à combustible
WO2019122976A1 (fr) * 2017-12-21 2019-06-27 Idea S.P.A. Dispositif et procédé de régulation et de détection de flamme de brûleur à gaz
DE202020106475U1 (de) 2020-11-11 2021-01-14 Siemens Aktiengesellschaft Flammendetektion für Verbrennungsvorrichtungen
DE102019121973A1 (de) 2019-08-15 2021-02-18 Vaillant Gmbh Heizgerät für ein Gebäude

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3103940A1 (de) 1981-02-05 1982-08-12 Günter Dr.-Ing. 7405 Dettenhausen Baumbach Vorrichtung zur ueberwachung von feuerungsabgasen
DE19726169C2 (de) 1997-06-20 2003-02-27 Stiebel Eltron Gmbh & Co Kg Regeleinrichtung für einen Gasbrenner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040174265A1 (en) * 2003-03-07 2004-09-09 Ranco Incorporated Of Delaware Flame sense circuit and method with analog output
DE102004059494A1 (de) 2004-12-10 2006-06-22 European Fuel Cell Gmbh Verfahren zur Bestimmung einer Luftzahl bei einem Brenner für ein Brennstoffzellenheizgerät sowie Brennstoffzellenheizgerät
DE102008059516A1 (de) * 2008-11-28 2010-06-02 Owi Oel-Waerme-Institut Ggmbh Verfahren zur Messung der Umsatzrate bzw. der Reaktionsgeschwindigkeit in Flammen
EP3279992A1 (fr) * 2015-03-30 2018-02-07 Panasonic Intellectual Property Management Co., Ltd. Système de pile à combustible
WO2019122976A1 (fr) * 2017-12-21 2019-06-27 Idea S.P.A. Dispositif et procédé de régulation et de détection de flamme de brûleur à gaz
DE102019121973A1 (de) 2019-08-15 2021-02-18 Vaillant Gmbh Heizgerät für ein Gebäude
DE202020106475U1 (de) 2020-11-11 2021-01-14 Siemens Aktiengesellschaft Flammendetektion für Verbrennungsvorrichtungen

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DE102021118406A1 (de) 2023-01-19

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