EP4522917A1 - Verfahren zum betrieb einer brennereinrichtung - Google Patents
Verfahren zum betrieb einer brennereinrichtungInfo
- Publication number
- EP4522917A1 EP4522917A1 EP23731513.0A EP23731513A EP4522917A1 EP 4522917 A1 EP4522917 A1 EP 4522917A1 EP 23731513 A EP23731513 A EP 23731513A EP 4522917 A1 EP4522917 A1 EP 4522917A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel gas
- ignition
- capacitor
- air
- voltage curve
- 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
Links
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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
- F23Q3/008—Structurally associated with fluid-fuel burners
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- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2227/00—Ignition or checking
- F23N2227/02—Starting or ignition cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2227/00—Ignition or checking
- F23N2227/28—Ignition circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2227/00—Ignition or checking
- F23N2227/34—Continuously applied ignition cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2227/00—Ignition or checking
- F23N2227/36—Spark ignition, e.g. by means of a high voltage
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/12—Fail safe for ignition failures
Definitions
- a method of the type mentioned at the beginning is known from the document DE 10 2020 107 735 Al.
- air is pumped into a combustion chamber.
- ignition sparks are generated with an ignition device arranged in the combustion chamber flooded with air.
- a fuel gas is mixed into the air.
- 15 electrical voltage values applied to the ignition device are measured in the period from before the ignition spark is generated until after the fuel gas has been added.
- the voltage measurement is not only carried out during the presence of the ignition spark, but beforehand, in order to be able to determine from the voltage change that occurs during the measurement that this has a minimum value, and therefore that the ignition spark has a minimum quality. Or again in other words: This procedure is used to assess the quality of the ignition spark.
- the invention is based on the object of improving a method of the type mentioned at the beginning.
- a method is to be created with which (if necessary in addition to the aforementioned method) the simplest possible adjustment of the fuel gas-air mixture can be achieved, even when using a fuel gas containing hydrogen.
- the voltage values measured in the said period of time and forming a voltage curve are used to detect a combustion of at least 20 vol. —% of the fuel gas-air mixture containing hydrogen should be evaluated for the beginning of flame formation.
- the method according to the invention is characterized in that the phase of admixing the fuel gas when starting the burner device is precisely observed with regard to the electrical voltage that occurs.
- This method serves in particular to detect 15 the quality of the fuel gas and a control of the burner device based on or derived from it.
- Figure 1 shows schematically the burner device for carrying out the method according to the invention
- Figure 2 shows a voltage curve during flame formation with a small hydrogen content in the fuel gas
- Figure 3 shows a voltage curve during flame formation with a large proportion of hydrogen in the fuel gas. 5
- FIG. 1 shows a schematic representation of a burner device with which the method according to the invention can be carried out.
- air is first conveyed into a combustion chamber 1 in a known manner, in particular, 10 as shown, via the line 1.1 and the burner 1.2.
- ignition sparks are generated with an ignition device 2 (in particular electrical) which is arranged in the combustion chamber 1 flooded with air and preferably has two ignition electrodes 2.2.
- an ignition device 2 in particular electrical
- a fuel gas is mixed into the air, again via line 1.1 and burner 1.2.
- electrical voltage values present at the ignition device 2 in the physical unit “volt” are also measured. 20 Looking a little more closely, the electrical voltage in particular is measured between the aforementioned ignition electrodes 2.2.
- the voltmeter 2.3 shown schematically in FIG. 1 is used for this purpose.
- the voltage values measured in the said period of time and forming a voltage curve are evaluated to detect flame formation beginning with the combustion of the fuel gas-air mixture containing at least 20% by volume of hydrogen.
- the fuel gas contains at least 90% by volume of hydrogen.
- the voltage curve on a capacitor 2 arranged between the two electrodes 2 .2 of the ignition device 2. 1 is measured.
- the voltage curve is recorded analogue, but digitized for evaluation (in a corresponding electronic unit).
- a change in the voltage curve on the capacitor 2. 1 is taken as a sign of flame formation in the said period.
- the said change can either be a drop (as shown in Figures 2 and 3) or an increase 15 (not shown separately) in the voltage curve.
- a comparatively large gradient is present on the voltage curve of the capacitor 2. 1 as a sign of a comparatively large and 20 a comparatively small gradient on the voltage curve of the capacitor 2. 1 is taken as a sign of a comparatively small proportion of hydrogen in the fuel gas.
- Figure 2 shows the small gradient and Figure 3 shows the large gradient. 25
- a volume flow of supplied fuel gas is continuously increased starting from zero during the said period of time.
- the volume flow of fuel gas supplied is kept constant from the moment flame formation is detected, i.e. H .
- the ratio of fuel gas and air is ideally fixed at exactly the ratio at which the flame was created (optimal combustion).
- the burner is started by supplying a constant air volume flow to the combustion system.
- the ignition is then switched on, causing high-voltage discharges between the ignition electrodes 2. 1 train. Within a few milliseconds, the resulting plasma of ionized air reaches the maximum breakdown voltage.
- the ignition spark causes a voltage to act on the capacitor 2. 1, which serves as a measurement signal and in the (not shown separately) Burner controls are digitized.
- the capacitor 2. 1 has a capacitor-typical charging behavior when the ignition is switched on. To suppress electromagnetic effects, the digitized signal is filtered by software. If a "safe" ignition has been determined (see again 5 the document DE 10 2020 107 735 Al), the gas safety valve is opened and the gas control valve is moved according to the characteristic curve (gas ramp).
- thermochemical, predominantly exothermic reactions begin immediately, which lead to self-sustaining flame propagation.
- the exothermicity of the flame itself leads to a change in the conductivity at the ignition electrodes 2. 1, which reduces the breakdown voltage. This causes the capacitor to discharge, even though the ignition is switched on.
- the digitized signal also undergoes a change depending on the selected filter settings.
- threshold value level-based
- gradient-based evaluation of the signal various processes in the starting sequence such as flame detection or stopping the gas ramp can be controlled, as described in more detail above.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022111802.9A DE102022111802A1 (de) | 2022-05-11 | 2022-05-11 | Verfahren zum Betrieb einer Brennereinrichtung |
| PCT/DE2023/150009 WO2023217327A1 (de) | 2022-05-11 | 2023-05-05 | Verfahren zum betrieb einer brennereinrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4522917A1 true EP4522917A1 (de) | 2025-03-19 |
| EP4522917B1 EP4522917B1 (de) | 2026-04-22 |
Family
ID=86851338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23731513.0A Active EP4522917B1 (de) | 2022-05-11 | 2023-05-05 | Verfahren zum betrieb einer brennereinrichtung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4522917B1 (de) |
| DE (1) | DE102022111802A1 (de) |
| WO (1) | WO2023217327A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024117684A1 (de) * | 2024-06-24 | 2025-12-24 | Vaillant Gmbh | Verfahren zur Inbetriebnahme eines Heizgerätes, Heizgerät, Computerprogrammprodukt und Verwendung eines Ionisationssignals |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE502005009411D1 (de) | 2005-05-06 | 2010-05-27 | Siemens Building Tech Ag | Verfahren und Vorrichtung zur Flammenüberwachung |
| DE102010001307B4 (de) * | 2010-01-28 | 2013-12-24 | Viessmann Werke Gmbh & Co Kg | Verfahren und Vorrichtung zur auf Ionisationsstrommessung basierenden Flammenerkennung sowie Flammenüberwachungssystem |
| WO2015017018A1 (en) * | 2013-08-01 | 2015-02-05 | Carrier Commercial Refrigeration, Inc | Flame sense assembly with ground screen |
| DE102013226468A1 (de) | 2013-12-18 | 2015-06-18 | Robert Bosch Gmbh | Diagnosegerät, Zündsystem mit solch einem Diagnosegerät und Verfahren zur Überwachung eines Zündvorgangs |
| DE102019119206A1 (de) * | 2019-07-16 | 2021-01-21 | Vaillant Gmbh | Verfahren und Vorrichtung zur Anpassung der Empfindlichkeit eines Detektors zur Überwachung einer Flamme in einem Heizgerät |
| DE102020107735A1 (de) | 2020-03-20 | 2021-09-23 | Viessmann Werke Gmbh & Co Kg | Verfahren zum Betrieb einer Brennereinrichtung |
| DE102020205449A1 (de) | 2020-04-29 | 2021-11-04 | Viessmann Werke Gmbh & Co Kg | Vorrichtung und Verfahren zur Verbrennungsregelung für ein Brenngas mit anteiligem Zusatzgas |
-
2022
- 2022-05-11 DE DE102022111802.9A patent/DE102022111802A1/de active Pending
-
2023
- 2023-05-05 WO PCT/DE2023/150009 patent/WO2023217327A1/de not_active Ceased
- 2023-05-05 EP EP23731513.0A patent/EP4522917B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022111802A1 (de) | 2023-11-16 |
| EP4522917B1 (de) | 2026-04-22 |
| WO2023217327A1 (de) | 2023-11-16 |
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