EP3495735B1 - Vollvormischender gasbrenner - Google Patents

Vollvormischender gasbrenner Download PDF

Info

Publication number
EP3495735B1
EP3495735B1 EP18203648.3A EP18203648A EP3495735B1 EP 3495735 B1 EP3495735 B1 EP 3495735B1 EP 18203648 A EP18203648 A EP 18203648A EP 3495735 B1 EP3495735 B1 EP 3495735B1
Authority
EP
European Patent Office
Prior art keywords
burner
supply
guiding device
area
air mixture
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.)
Active
Application number
EP18203648.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3495735A1 (de
Inventor
Matthias Wodtke
Frank Altendorf
Thomas Ernst
Jan Heitmann
Markus Polus
Uwe Schürbrock
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.)
Vaillant GmbH
Original Assignee
Vaillant 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 Vaillant GmbH filed Critical Vaillant GmbH
Priority to PL18203648T priority Critical patent/PL3495735T3/pl
Publication of EP3495735A1 publication Critical patent/EP3495735A1/de
Application granted granted Critical
Publication of EP3495735B1 publication Critical patent/EP3495735B1/de
Priority to HRP20201568TT priority patent/HRP20201568T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F23N5/12—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
    • 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
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/60—Devices for simultaneous control of gas and combustion air
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/70—Baffles or like flow-disturbing devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F23D2203/1012—Flame diffusing means characterised by surface shape tubular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/102—Flame diffusing means using perforated plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2208/00—Control devices associated with burners
    • F23D2208/10—Sensing devices

Definitions

  • the burners must be monitored for the presence of a flame.
  • an ionization electrode is usually installed just above the burner surface. In the presence of a flame, a current flow through the flame can be measured. When the flame goes out, the flow of current stops; a control system evaluates this signal and closes the fuel gas supply.
  • the object of the invention is to create a fully premixing burner which enables a sufficient flame in the area of the ionization electrode even with very low surface loads.
  • this object is achieved by claim 1, a corresponding guide device being integrated upstream of the burner surface of a fully premixing burner, which enables an increased deflection in the direction of the ionization electrode.
  • a flow guide forming a pyramid segment is introduced in the direction of flow in front of the burner surface.
  • the flow guidance is designed in such a way that a defined proportion of the flow cross-section in the fuel gas-air path is tapped in front of the burner surface and directed to a limited outlet area of the burner surface.
  • the proportion of this exit area relative to the entire burner exit area is smaller than the proportion of the tapped entry area of the fuel gas-air mixture flow relative to the entire flow cross-section of the fuel gas-air mixture flow in the entry area of the flow guide according to the invention.
  • the flow velocity and the volume flow of the fuel gas-air mixture are increased locally.
  • An ionization current-based fuel gas-air mixture control is thus provided with a sufficiently high and stable measurement signal for control at significantly lower loads, which enables load modulations of 1:20.
  • the figures show a premix burner 1 for a fuel gas-air mixture, with a feed 2 for the fuel gas-air mixture.
  • the premix burner 12 has a cylindrical burner surface 3; A perforated inner cylinder 5 is located concentrically below it. On one side of the cylindrical burner surface 3 is the round feed 2, around which an annular burner flange 9 with the burner surface 3 and the Inner cylinder 5 is connected. Optionally, the burner flange 9 could also only be connected to the burner surface 3 or the inner cylinder 5.
  • the burner flange 9 has a notch 10. On one side of the cylindrical burner surface 3 there is an end plate 6 which closes the premix burner 1 on this side.
  • a pyramid-shaped guide device 4 is arranged in a partial area of the feed 2.
  • the guide device 4 has within the burner flange 9 an open entry area in the shape of a segment of a circle, which makes up approximately one eighth of the entry area of the feed 2.
  • the guide device 4 also has two flat surfaces 41, 42, which lead from the feed 2 to a partial area of the burner surface 3 and hereby form a pyramid segment.
  • the two surfaces 41, 42 end at the inner cylinder 5.
  • the pyramid segment covers about 1/32 of the inner cylinder 5.
  • the guide device 4 is located below the notch 10 in the burner flange 9, so that it can also be recognized from the outside where the inner guide device 4 is located.
  • the ratio of the area encompassed by the burner flange 9 in the feed 2 to the portion therein which is covered by the guide device 4 is thus 8: 1, while the ratio of the total burner surface to the portion therein which is covered by the guide device 4 is 32 : 1 is.
  • the portion of the cover at the entrance is therefore by a factor of 4 larger than at the exit, which makes it clear that a relatively large proportion is diverted from the entrance to a relatively small proportion at the exit, in particular with a homogenized flow entry into the burner, this results in a sufficient flow of the monitoring area reached.
  • the premix burner 1 is mounted in such a way that an ionization electrode 7 is located on the other side of the burner surface 3 opposite the guide device 4, in that in a device according to the exemplary embodiment, the notch 10 is located below the ionization electrode 7 in the mounted state.
  • the fuel gas-air mixture flows through the feed 2 into the cylindrical interior of the premix burner 1.
  • the perforated inner cylinder 5 ensures an even distribution of the fuel gas-air mixture on the burner surface 3. Deviating from this, the portion of the fuel gas-air mixture which flows into the guide device 4 at the feeder 2 is predominantly in the area above Burner surface 3 out.
  • the quantity of the deflection can be determined by choosing a perforation of the guide device 4. In the case of a closed guide device 4, the entire inflowing fuel gas-air mixture is directed into the region of the burner surface 3 located above it. The higher the perforation, the more fuel gas-air mixture can flow out of the guide device 4 into other areas of the burner surface 3.
  • the area of the burner surface 3 above the guide device 4 has more fuel gas-air mixture flowing through it than the rest of the burner surface 3.
  • a flame 8 is formed after ignition, which surrounds the premix burner 1.
  • the flame 8 in the area of the guide device 4 is larger than in the remaining area of the burner surface 3.
  • the surface loading above the guide device 4 is greater than in the remaining area and, with appropriate dimensions, is sufficient to remove the ionization electrode 7 arranged above to be able to deliver a sufficient signal.
  • the positioning of the guide device 4 in relation to the notch 10 could be designed as desired. It is only essential that the position of the guide device 4 can be determined in a defined manner by means of the notch 10 and that the premix burner 1 is thus positioned during installation such that the ionization electrode 7 is on the other side of the burner surface 3 opposite the guide device 4.
  • the inner cylinder 5 can be perforated or not perforated.
  • the burner surface loading is increased in a defined area of the surface of a burner for gas-fired heating devices and is thus optimized for flame monitoring.
  • measuring means for the quantitative determination of the ionization current usually ignition / ionization electrodes
  • a relatively high ionization current is measured above this burner surface area on or in the flame, which would not be measurable with a homogeneous distribution.
  • the invention ensures a stable control signal necessary for this regulation over an enlarged modulation range of the heat load.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP18203648.3A 2017-12-05 2018-10-31 Vollvormischender gasbrenner Active EP3495735B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL18203648T PL3495735T3 (pl) 2017-12-05 2018-10-31 Palnik gazowy ze wstępnym mieszaniem całkowitym
HRP20201568TT HRP20201568T1 (hr) 2017-12-05 2020-10-02 Plinski plamenik za potpuno prethodno miješanje

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017128802.3A DE102017128802A1 (de) 2017-12-05 2017-12-05 Vollvormischender Gasbrenner

Publications (2)

Publication Number Publication Date
EP3495735A1 EP3495735A1 (de) 2019-06-12
EP3495735B1 true EP3495735B1 (de) 2020-08-19

Family

ID=64048890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18203648.3A Active EP3495735B1 (de) 2017-12-05 2018-10-31 Vollvormischender gasbrenner

Country Status (6)

Country Link
EP (1) EP3495735B1 (pt)
DE (1) DE102017128802A1 (pt)
ES (1) ES2823025T3 (pt)
HR (1) HRP20201568T1 (pt)
PL (1) PL3495735T3 (pt)
PT (1) PT3495735T (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100012668A1 (it) * 2021-05-17 2022-11-17 Beckett Thermal Solutions S R L Bruciatore

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT391197B (de) * 1988-04-28 1990-08-27 Vaillant Gmbh Vorrichtung zur ueberwachung des betriebes der von gemischaustrittsoeffnungen durchsetzten brennerplatte eines flaechenbrenners
DE19912076A1 (de) 1999-03-18 2000-09-21 Kromschroeder Ag G Vormischbrenner für gasförmige Brennstoffe
DE102005056499B4 (de) * 2005-11-28 2009-04-23 Ceramat, S. Coop., Asteasu Gasbrenner
EP2177830A1 (de) * 2008-10-16 2010-04-21 Siemens Building Technologies HVAC Products GmbH Gasbrenner für eine Gas-Luft-Verbundregelung
DE202011005262U1 (de) * 2010-05-28 2011-12-22 Jaroslav Klouda Brenner mit Zündhilfe
WO2012076600A1 (en) * 2010-12-09 2012-06-14 Bekaert Combustion Technology B.V. Burner with locally fixed burner deck

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2823025T3 (es) 2021-05-05
HRP20201568T1 (hr) 2021-02-19
EP3495735A1 (de) 2019-06-12
PT3495735T (pt) 2020-10-09
PL3495735T3 (pl) 2020-11-30
DE102017128802A1 (de) 2019-06-06

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