EP0794384B1 - Petit appareil de combustion pour l'usage domestique - Google Patents

Petit appareil de combustion pour l'usage domestique Download PDF

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Publication number
EP0794384B1
EP0794384B1 EP97100752A EP97100752A EP0794384B1 EP 0794384 B1 EP0794384 B1 EP 0794384B1 EP 97100752 A EP97100752 A EP 97100752A EP 97100752 A EP97100752 A EP 97100752A EP 0794384 B1 EP0794384 B1 EP 0794384B1
Authority
EP
European Patent Office
Prior art keywords
burner
combustion device
plate
radiator plate
heated
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
EP97100752A
Other languages
German (de)
English (en)
Other versions
EP0794384A2 (fr
EP0794384A3 (fr
Inventor
Horst Dr.-Ing. Büchner
Wolfgang Prof. Dr.-Ing. Leuckel
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.)
DVGW Deutscher Verein des Gas- und Wasserfaches eV
Original Assignee
DVGW Deutscher Verein des Gas- und Wasserfaches eV
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 DVGW Deutscher Verein des Gas- und Wasserfaches eV filed Critical DVGW Deutscher Verein des Gas- und Wasserfaches eV
Publication of EP0794384A2 publication Critical patent/EP0794384A2/fr
Publication of EP0794384A3 publication Critical patent/EP0794384A3/fr
Application granted granted Critical
Publication of EP0794384B1 publication Critical patent/EP0794384B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2209/00—Safety arrangements
    • F23D2209/20—Flame lift-off / stability
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2210/00—Noise abatement

Definitions

  • the invention relates to a furnace, in particular a small furnace for domestic use, with a burner that has a variety of burner outlet openings closely adjacent to one another, through which a fuel / air mixture flows, the downstream the burner is burned.
  • Furnaces of this type can be found in gas boilers or gas heating systems or boiler, the burner usually made of a metallic or ceramic material. Because of the many Exit openings are also referred to as a "multiple port” or one "Carpet burner”. These burners are usually premixed Fuel / air mixture supplied. The burner is at least sectionally designed sieve-like and the fuel / air mixture passes through the closely adjacent burner outlet openings thus formed laminar through and is downstream in a variety of Single flames burned, the individual burner outlet openings are to be assigned. Appropriate furnaces or burners are for example described in US-A-3 805 763, DE-A-1 551 790, JP-A-08 135 914 or JP-A-01 310 217.
  • Flame / pressure vibrations can occur on such furnaces, as they are in industrial incineration plants, such as Example gas turbine combustion chambers, industrial furnaces, etc. are known. While those occurring in industrial incineration plants Pressure vibrations, however, are usually comparatively low frequencies and have high amplitudes are those described here Pressure fluctuations often occur in small furnaces characterized by high frequency but low amplitudes. In order to there is an intolerable acoustic load on these systems in the form of a pipe. To be able to eliminate this whistle by the burner or device manufacturers at great financial expense Were looking for the occurrence of these burn instabilities due to changes to the burner or the combustion chamber geometry to prevent.
  • the object of the present invention is therefore one described above To further develop the furnace so that the vibrations, that is So the whistling, under the usual operating conditions in the desired Control range of the furnace no longer occur.
  • the burner surface is heated in the area of the burner outlet openings, whereby it is connected to a supply device for hot flue gases, whereby the burner surface by heat exchange with hot, burned out Flue gases are heated, the flue gas being in a double wall.
  • Burner plate is guided into which the burner outlet openings are incorporated as through channels, so that the Cannot mix flue gases with the fresh gas mixture.
  • the invention is based on the knowledge that the flame carpet single flames not sufficiently stabilized are. In the industrial incineration plants mentioned above constructive measures are taken for this. But this is with the burners of interest here due to the large number of outlet openings, from which the fuel gas / air mixture in many individual jets leaves, not justifiable for economic reasons.
  • the heating according to the invention now increases significantly Burner surface temperature reached, which is a significant consequence Has improved ignition stability of the flame and so the ignition vibrations suppressed.
  • the burner is preferably made of a material that is sufficient when an electrical current is passed through Dimensions heated.
  • the burner surface continues warmed by heat radiation, for which purpose a radiation shield is placed in the furnace.
  • This radiation shield is both in relation to the burner surface and in relation to the usually water-cooled combustion chamber wall of hot solids.
  • the heat radiation emanating from this increases the temperature the burner surface, so that there is a uniform, significantly increases surface temperature, which is an improvement the ignition stability of the flame and the ignition vibrations suppressed. It lends itself to the radiation shield through the To heat flames or the flue gases that roam past the radiation shield. These have a temperature of approx. 1,200 - 1,400 ° C, see above that the radiation shield is at a temperature of approx. 800 - 1,000 ° C or heated above.
  • the radiation shield can be made of metallic material, for example stainless steel, or also made of ceramic material. Essential is that the material is resistant to the high temperature against oxidation etc. remains and the corresponding radiation properties a solid-state radiator with sufficient radiation emissivity developed.
  • the extraction of the flue gases is not considered from a flow point of view hampers when the radiation shield is particularly grid-shaped is.
  • the radiation shield is preferably parallel to the burner surface arranged, in embodiments in which a special radiation characteristic is necessary, but is also an inclined position of the radiation shield to the burner surface is conceivable.
  • a furnace is shown in section.
  • This furnace shows a water-cooled combustion chamber wall 1, which on this Combustion chamber wall cooling water the useful heat of the furnace wearing.
  • the temperature of the combustion chamber wall is in a range in the order of 100 ° C.
  • the combustion chamber wall is heated through hot flue gases with a temperature of about 1,200 to 1,400 ° C, which are generated by a flame carpet that is made up of composed of a large number of individual flames 2.
  • These single flames 2 arise at a variety of burner outlet openings 3, the are formed in a burner plate 4.
  • This burner plate is over a feed pipe 5 a premixed fuel gas / air mixture 6 is fed, that passes through the burner outlet openings 3 of the burner plate 4 and then burned accordingly.
  • the fuel gas / air mixture (Fresh gas mixture) itself is relatively cool, especially has about ambient temperature, the burner plate through which it flows, kept at about this temperature.
  • the burner plate 4 is heated.
  • the burner plate 4 is designed with two shells, by providing a lower shell 7 at a distance from the burner plate 4 is and the supply pipe 5 for the fuel gas / air mixture 6 closes.
  • the lower shell 7 is provided with through openings 8 which over a space 9 by means of tubes 10 to the burner outlet openings 3 are connected.
  • Through the gap 9 hot fuel gases 11 are passed through, which correspond to the fuel plate 4 heat, causing an increase in this via heat conduction the temperature of the burner surface 4a and thus for stabilization the single flame 2 or the flame carpet. Kick it here no more flame vibrations and one with previous ones Whistles frequently observed by burners are avoided in this way.
  • the hot flue gases 11 are via a line, not shown taken from the combustion chamber 12 delimited by the combustion chamber wall 1, on the bottom 13 of which the burner is arranged.
  • FIG. 2 shows additional heating for a burner plate 4 or the burner surface 4a.
  • the heating is by means of an electrical power source 14 to which the burner plate 4 connected via a corresponding connecting cable 15 and from which it is supplied with electrical current.
  • This electric current causes heating on the burner plate 4, because whose material offers a certain resistance to the current.
  • the heating of the burner surface 4a caused thereby also leads to stabilize the ignition of the individual flames forming the carpet of flames Second
  • This radiation shield is caused by hot flue gases 18 from the individual flames 2 composite flame carpet to a temperature of the order of magnitude heated from approx. 800 - 1,000 ° C.
  • the radiation shield one compared to the cooled combustion chamber wall 1 or unheated burner surface 4a significantly higher temperature and it begins to radiate energy like a hot solid, being a a certain proportion of this as a net radiation heat flow 19 onto the surface 4a of the burner 4 is emitted.
  • This radiant heat heats up the burner surface 4a accordingly, so that this too How an ignition stabilization is achieved and that already mentioned Whistling no longer occurs.
  • the radiation shield 17 is parallel to in the example shown here Burner plate 4 aligned, but it can also be compared to the burner plate if the heating is weakened the burner plate 4 by the radiation shield 17 in certain areas is desired.
  • the radiation shield 17 consists of a ceramic material that is selected for its suitability as a hot solid-state heater. It can also be made of metal.
  • the radiation shield can also be designed in the form of a lattice or rust, then by choosing an appropriate distance between the individual grid or grate spacings a distribution of heat radiation is possible according to the specific requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Inorganic Insulating Materials (AREA)
  • Pyridine Compounds (AREA)
  • Furan Compounds (AREA)

Claims (11)

  1. Appareil de combustion, en particulier petit appareil de combustion, avec un brûleur (4) comportant une pluralité d'ouvertures d'évacuation du brûleur (3) étroitement rapprochées les unes des autres, à travers lesquelles circule un mélange combustible-air (6) qui est brûlé en aval du brûleur, la surface de brûleur (4a) du brûleur (4) étant chauffée au moins dans la zone des ouvertures d'évacuation du brûleur (3), caractérisé en ce que l'appareil de combustion est pourvu d'un dispositif d'amenée des gaz brûlés chauds (11) au brûleur (4) afin de chauffer la surface de brûleur (4a), et en ce que le gaz brûlé (11) est guidé dans une plaque de brûleur à double paroi (4) comportant en guise de canal de passage (10) les ouvertures d'évacuation du brûleur (3).
  2. Appareil de combustion selon la revendication 1, caractérisé en ce que la surface de brûleur (4a) peut être chauffée à l'électricité.
  3. Appareil de combustion selon la revendication 2, caractérisé en ce que le brûleur (4) est constitué d'un matériau se réchauffant au passage d'un courant électrique.
  4. Appareil de combustion selon la revendication 1, caractérisé en ce que la surface de brûleur (4a) est disposée en vis-à-vis d'un panneau à rayonnement (17).
  5. Appareil de combustion selon la revendication 4, caractérisé en ce que le panneau à rayonnement (17) est chauffé par les flammes (2) ou leurs gaz de combustion.
  6. Appareil de combustion selon la revendication 4, caractérisé en ce que le panneau à rayonnement (17) est fabriqué à partir d'un matériau métallique.
  7. Appareil de combustion selon la revendication 4, caractérisé en ce que le panneau à rayonnement (17) est en matériau céramique.
  8. Appareil de combustion selon la revendication 4, caractérisé en ce que le panneau à rayonnement (17) a la forme d'une grille.
  9. Appareil de combustion selon la revendication 4, caractérisé en ce que le panneau à rayonnement (17) est disposé parallèlement au brûleur (4).
  10. Appareil de combustion selon la revendication 4, caractérisé en ce que le panneau à rayonnement (17) présente par rapport à la surface du brûleur (4) une position inclinée.
  11. Appareil de combustion selon la revendication 4, caractérisé en ce que le brûleur (4) est tubulaire et qu'il comporte des ouvertures d'évacuation des gaz (3), et en ce que le panneau à rayonnement (17) est conçu sous forme d'un tube ou d'un cône tronqué disposé concentriquement au brûleur (4).
EP97100752A 1996-02-08 1997-01-18 Petit appareil de combustion pour l'usage domestique Expired - Lifetime EP0794384B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19604585A DE19604585A1 (de) 1996-02-08 1996-02-08 Kleinfeuerung für den häuslichen Nutzungsbereich
DE19604585 1996-02-08

Publications (3)

Publication Number Publication Date
EP0794384A2 EP0794384A2 (fr) 1997-09-10
EP0794384A3 EP0794384A3 (fr) 1999-02-03
EP0794384B1 true EP0794384B1 (fr) 2002-11-20

Family

ID=7784859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97100752A Expired - Lifetime EP0794384B1 (fr) 1996-02-08 1997-01-18 Petit appareil de combustion pour l'usage domestique

Country Status (3)

Country Link
EP (1) EP0794384B1 (fr)
AT (1) ATE228226T1 (fr)
DE (2) DE19604585A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2310743B2 (fr) 2008-07-08 2025-08-13 Solaronics S.A. Brûleur radiant

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1551790C3 (de) * 1967-07-18 1978-03-09 Irene 4600 Dortmund-Hoerde Goch Geb. Putsch Brennerplatte aus insbesondere keramischem Material für die flammenlose Verbrennung
US3805763A (en) * 1972-08-21 1974-04-23 E Cowan Flush-mountable, self-cooling gas-fired heater
US4397631A (en) * 1980-09-08 1983-08-09 The Carlin Company Pre-mix forced draft power gas burner
FR2589555B1 (fr) * 1985-11-06 1989-11-10 Gaz De France Bruleur a gaz a air souffle
JPH01310217A (ja) * 1988-06-09 1989-12-14 Rinnai Corp 燃焼プレート
JPH08135914A (ja) * 1994-11-09 1996-05-31 Tokyo Gas Co Ltd 低ｎｏｘ ガスバーナ

Also Published As

Publication number Publication date
DE59708741D1 (de) 2003-01-02
EP0794384A2 (fr) 1997-09-10
EP0794384A3 (fr) 1999-02-03
DE19604585A1 (de) 1997-08-14
ATE228226T1 (de) 2002-12-15

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