EP0063079B1 - Positioning device for a radial burner of a condensing boiler - Google Patents

Positioning device for a radial burner of a condensing boiler Download PDF

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Publication number
EP0063079B1
EP0063079B1 EP19820400609 EP82400609A EP0063079B1 EP 0063079 B1 EP0063079 B1 EP 0063079B1 EP 19820400609 EP19820400609 EP 19820400609 EP 82400609 A EP82400609 A EP 82400609A EP 0063079 B1 EP0063079 B1 EP 0063079B1
Authority
EP
European Patent Office
Prior art keywords
burner
combustion chamber
fact
radial
water tubes
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
Application number
EP19820400609
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German (de)
French (fr)
Other versions
EP0063079A1 (en
Inventor
Jean-Claude Charron
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.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
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Application filed by Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Publication of EP0063079A1 publication Critical patent/EP0063079A1/en
Application granted granted Critical
Publication of EP0063079B1 publication Critical patent/EP0063079B1/en
Expired legal-status Critical Current

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Classifications

    • 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 
    • F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/403—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes the water tubes being arranged in one or more circles around the burner

Definitions

  • the invention relates to a radial burner for condensing boilers and more specifically relates to the positioning of the burner inside the combustion chamber.
  • the combustion chamber in this type of device contains a blown air burner whose gases are emitted radially and pass through the cylindrical layer of water tubes with which heat exchange takes place.
  • the tubes are obviously dimensioned and arranged so as to obtain a laminar gas flow, and large exchange surfaces with them.
  • These tubes are themselves housed in a sealed chamber consisting of a shell, the upper part of which communicates with a discharge duct.
  • the combustion products are therefore collected by this shell which forms an outer casing autor of the combustion chamber.
  • This shell constitutes a cylindrical box autor of the layer of water tubes centered on the same vertical axis which is also the axis of the radial burner.
  • Such an apparatus is known from FR-A-2,371,642.
  • the invention proposes a solution which avoids this drawback by using a means suitable for breaking this axial symmetry of the burner-combustion chamber to thereby avoid successive reflections of sustained sound waves.
  • the radial burner is disposed slightly off-center with respect to the axis of the chamber, so that the waves emitted do not come from this axis and therefore do not regularly reflect on the water tubes or the outer shell.
  • the sustained waves then have a damping coefficient such that the noise generated during ignition weakens very quickly.
  • the burner is engaged in an off-center orifice provided in a disc-shaped support plate fitting at the base of the combustion chamber.
  • FIG. 1 shows an exchanger delimited by a cylindrical shell 1 which rests on a lower base 2 pierced with orifices suitable for the passage of conduits 3 and 4 for the arrival and departure of water, and for the tubing 5 for admitting the gas mixture to the radial burner 6 disposed in the exchanger.
  • a cylindrical shell 1 which rests on a lower base 2 pierced with orifices suitable for the passage of conduits 3 and 4 for the arrival and departure of water, and for the tubing 5 for admitting the gas mixture to the radial burner 6 disposed in the exchanger.
  • the water tubes 7 which form a fully self-contained cylindrical sheet of the burner 6, their shape and their spacing being determined so as to have large exchange surfaces with the combustion gases.
  • Water circulates in the tubes of the sheet from a lower distributor ring 8 to an upper distributor ring 9 and vice versa, thanks to a set of baffles not shown located in the rings.
  • the air-gas mixture coming from a mixing chamber 12 is blown towards the burner by
  • the cylindrical shell is capped with a cover 11 provided with an orifice 13 for the evacuation of the burnt gases.
  • the mixing chamber 12 disposed parallel to the shell is supported on an extension of the lower base 2 and is connected to the tube 5.
  • the burner 6 is not centered in the middle of the combustion chamber but that, on the contrary, it is slightly off-center with respect to the axis of revolution BB 'of this chamber.
  • the burner support plate which is in the form of a disc 14 is provided with an orifice 15 which is off-center with respect to said axis BB '. This plate fits at the base of the combustion chamber in the lower base 2.
  • the figures represent the off-center burner on the side opposite to the mixing chamber 12, but it could also be shifted in another direction.
  • the disc 14 also serves as a support for the spark plugs 16 for ignition of the burner, which is made possible by the fact that the orifice 15 is off-center and that the plate 14 thus has a crown which is wider on one side than on the 'other and which can therefore serve as a base for said candles.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Gas Burners (AREA)

Description

L'invention a pour objet un brûleur radial pour chaudière à condensation et concerne plus précisément le positionnement du brûleur à l'intérieur de la chambre de combustion.The invention relates to a radial burner for condensing boilers and more specifically relates to the positioning of the burner inside the combustion chamber.

On sait la chambre de combustion dans ce type d'appareil renferme un brûleur à air soufflé dont les gaz sont émis radialement et traversent la nappe cylindrique de tubes d'eau avec lesquels s'effectuent les échanges thermiques. Les tubes sont évidemment dimensionnés et disposés de façon à obtenir un écoulement laminaire de gaz, et des surfaces d'échanges importantes avec eux. Ces tubes sont euxmêmes logés dans une chambre étanche constituée d'une coquille dont la partie supérieure communique avec un conduit d'évacuation. Les produits de combustion sont donc recueillis par cette coquille qui forme une enveloppe extérieure autor de la chambre de combustion. Cette coquille constitue une boîte cylindrique autor de la nappe de tubes d'eau centrés sur le même axe vertical qui est également l'axe du brûleur radial. Un tel appareil est connu du FR-A-2 371 642.We know the combustion chamber in this type of device contains a blown air burner whose gases are emitted radially and pass through the cylindrical layer of water tubes with which heat exchange takes place. The tubes are obviously dimensioned and arranged so as to obtain a laminar gas flow, and large exchange surfaces with them. These tubes are themselves housed in a sealed chamber consisting of a shell, the upper part of which communicates with a discharge duct. The combustion products are therefore collected by this shell which forms an outer casing autor of the combustion chamber. This shell constitutes a cylindrical box autor of the layer of water tubes centered on the same vertical axis which is also the axis of the radial burner. Such an apparatus is known from FR-A-2,371,642.

Cet ensemble présentant une symétrie axiale parfaite n'est pas sans présenter d'inconvénients au moment de l'allumage du brûleur car l'expansion brutale des produits de combustion avec des gradients de température très élevés, génère des vibrations de fréquence audible qui se réfléchissent parfaitement sur les parois de la boîte circulaire puis qui se réfléchissent à nouveau sur le front de flammes et ainsi de suite, entretenant par là même un bruit continu d'intensité élevée qui ne peut être admis pour des appareils à fonctionnement permanent.This assembly having perfect axial symmetry is not without presenting drawbacks when the burner is ignited because the sudden expansion of the combustion products with very high temperature gradients generates vibrations of audible frequency which are reflected perfectly on the walls of the circular box then which are reflected again on the flame front and so on, thereby maintaining a continuous noise of high intensity which cannot be admitted for devices with permanent operation.

L'invention propose une solution qui évite cet inconvénient en utilisant un moyen propre à rompre cette symétrie axiale brûleur-chambre de combustion pour éviter ainsi réflexions successives d'ondes sonores entretenues.The invention proposes a solution which avoids this drawback by using a means suitable for breaking this axial symmetry of the burner-combustion chamber to thereby avoid successive reflections of sustained sound waves.

Selon l'invention le brûleur radial est disposé de façon légèrement excentrée par rapport à l'axe de la chambre, pour que les ondes émises ne proviennent pas de cet axe et ne se réfléchissent donc pas de façon régulière sur les tubes d'eau ou la coquille extérieure. Les ondes entretenues présentent alors un coefficient d'amortissement tel que le bruit engendré lors de l'allumage faiblisse très rapidement.According to the invention, the radial burner is disposed slightly off-center with respect to the axis of the chamber, so that the waves emitted do not come from this axis and therefore do not regularly reflect on the water tubes or the outer shell. The sustained waves then have a damping coefficient such that the noise generated during ignition weakens very quickly.

Selon une caractéristique particulière de l'invention, le brûleur est engagé dans un orifice décentré prévu dans une platine-support en forme de disque s'emboîtant à la base de la chambre de combustion.According to a particular characteristic of the invention, the burner is engaged in an off-center orifice provided in a disc-shaped support plate fitting at the base of the combustion chamber.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui va suivre d'une forme de réalisation en référence aux dessins annexés qui représentent:

  • - figure 1: une vue schématique en coupe de l'échangeur et du brûleur,
  • - figure 2: une vue en coupe la ligne AA' de la figure 1.
Other characteristics and advantages of the invention will appear on reading the following description of an embodiment with reference to the appended drawings which represent:
  • - Figure 1: a schematic sectional view of the exchanger and the burner,
  • - Figure 2: a sectional view on line AA 'of Figure 1.

La partie centrale de la figure 1 montre un échangeur délimité par une coquille cylindrique 1 qui repose sur un socle inférieur 2 percé d'orifices appropriés pour le passage de conduits 3 et 4 d'arrivée et de départ d'eau, et de la tubulure 5 d'admission du mélange gazeux au brûleur radial 6 disposé dans l'échangeur. A l'intérieur de la coquille sont disposés verticalement les tubes d'eau 7 qui forment une nappe cylindrique tout autor du brûleur 6, leur forme et leur espacement étant déterminés pour présenter des surfaces d'échange importantes avec les gaz de combustion. L'eau circule dans les tubes de la nappe à partir d'un anneau répartiteur inférieur 8 vers un anneau répartiteur supérieur 9 et inversement, grâce à un jeu de chicanes non représentés localisées dans les anneaux. Le mélange air-gaz provenant d'une chambre de mélange 12 est soufflé vers le brûleur par un ventilateur 10 interposé sur la tubulure 5.The central part of FIG. 1 shows an exchanger delimited by a cylindrical shell 1 which rests on a lower base 2 pierced with orifices suitable for the passage of conduits 3 and 4 for the arrival and departure of water, and for the tubing 5 for admitting the gas mixture to the radial burner 6 disposed in the exchanger. Inside the shell are arranged vertically the water tubes 7 which form a fully self-contained cylindrical sheet of the burner 6, their shape and their spacing being determined so as to have large exchange surfaces with the combustion gases. Water circulates in the tubes of the sheet from a lower distributor ring 8 to an upper distributor ring 9 and vice versa, thanks to a set of baffles not shown located in the rings. The air-gas mixture coming from a mixing chamber 12 is blown towards the burner by a fan 10 interposed on the pipe 5.

La coquille cylindrique est coiffée d'un couvercle 11 muni d'un orifice 13 pour l'évacuation des gaz brûlés. La chambre de mélange 12 disposée parallèlement à la coquille est en appui sur un prolongement du socle inférieur 2 et se raccorde à la tubulure 5.The cylindrical shell is capped with a cover 11 provided with an orifice 13 for the evacuation of the burnt gases. The mixing chamber 12 disposed parallel to the shell is supported on an extension of the lower base 2 and is connected to the tube 5.

Les figures montrent que le brûleur 6 n'est pas centré au milieu de la chambre de combustion mais qu'il est au contraire légèrement décentré par rapport à l'axe de révolution BB' de cette chambre. A cet effet la platine-support du brûleur qui se présente sous la forme d'une disque 14 est muni d'un orifice 15 décentré par rapport audit axe BB'. Cette platine s'emboîte à la base de la chambre de combustion dans le socle inférieur 2. Les figures représentent le brûleur décentré du côté opposé à la chambre de mélange 12, mais il pourrait aussibien se trouver décalé dans un autre direction. Le disque 14 sert également de support aux bougies 16 d'allumage du brûleur ce qui est rendu possible par le fait que l'orifice 15 est décentré et que la platine 14 possède ainsi une couronne qui est plus large d'un côté que de l'autre et qui peut donc servir d'embase auxdites bougies. Par retrait de la platine 14, on enlève du même coup et de façon très simple le brûleur 6 et les bougies 16, ce qui facilite leur démontage et leur entretien.The figures show that the burner 6 is not centered in the middle of the combustion chamber but that, on the contrary, it is slightly off-center with respect to the axis of revolution BB 'of this chamber. For this purpose, the burner support plate which is in the form of a disc 14 is provided with an orifice 15 which is off-center with respect to said axis BB '. This plate fits at the base of the combustion chamber in the lower base 2. The figures represent the off-center burner on the side opposite to the mixing chamber 12, but it could also be shifted in another direction. The disc 14 also serves as a support for the spark plugs 16 for ignition of the burner, which is made possible by the fact that the orifice 15 is off-center and that the plate 14 thus has a crown which is wider on one side than on the 'other and which can therefore serve as a base for said candles. By removing the plate 14, the burner 6 and the spark plugs 16 are removed at the same time and very simply, which facilitates their disassembly and maintenance.

Ainsi réalisé, le brûleur n'est plus coaxial à l'échangeur et lors de l'allumage aussi bien qu'au cours du fonctionnement les vibrations de fréquence audible émises par le brûleur ne peuvent se réfléchir sur les parois extérieures ni sur le front de flammes et disparaissent immédiatement. L'excentration du brûleur par rapport aux tubes d'eau est évidemment limitée pour ne pas perturber l'émission radiale de flammes du côté le plus proche desdits tubes, ni provoquer de surchauffe sensible des tubes d'eau 7 dans la zone voisine.Thus produced, the burner is no longer coaxial with the exchanger and during ignition as well as during operation the vibrations of audible frequency emitted by the burner cannot be reflected on the external walls nor on the front of flames and disappear immediately. The eccentricity of the burner relative to the water tubes is obviously limited so as not to disturb the radial emission of flames on the side closest to said tubes, nor to cause significant overheating of the water tubes 7 in the neighboring area.

Claims (4)

1. A device for positioning a radial burner (6) for a condensation boiler whose flame outlet orifices are formed at the surface of a cylindrical grill with a vertical axis, received entirely within a combustion chamber defined by a cylindrical sheet of water tubes (7) having vertical axes, characterised by the fact that the radial burner (6) is disposed eccentrically with respect to the vertical axis (BB') of the combustion chamber.
2. A device according to claim 1, characterised by the fact that the burner (6) is engaged in an eccentric orifice (15) provided in a disc-shaped support plate (14) which is embedded in the base of the combustion chamber.
3. A device according to claims 1 and 2, characterised by the fact that igniters (16) of the burner are fixed on the support plate (14) on the larger side of the ring surrounding the eccentric orifice (15).
4. A device according to claim 1, characterised by the fact that the eccentricity of the burner (6) relative to the axis (BB') of the combustion chamber is limited to a distance compatible with a correct radial emission of the flames as well as with a very limited over-heating of the water tubes (7) in the neighbouring zone.
EP19820400609 1981-04-06 1982-04-02 Positioning device for a radial burner of a condensing boiler Expired EP0063079B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8106845A FR2503332B1 (en) 1981-04-06 1981-04-06 POSITIONING DEVICE FOR A RADIAL BURNER FOR A CONDENSING BOILER
FR8106845 1981-04-06

Publications (2)

Publication Number Publication Date
EP0063079A1 EP0063079A1 (en) 1982-10-20
EP0063079B1 true EP0063079B1 (en) 1984-10-31

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ID=9257040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820400609 Expired EP0063079B1 (en) 1981-04-06 1982-04-02 Positioning device for a radial burner of a condensing boiler

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EP (1) EP0063079B1 (en)
DE (1) DE3261106D1 (en)
FR (1) FR2503332B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0859210A1 (en) * 1994-06-01 1998-08-19 Caradon Ideal Limited Heat exchangers
DE102004038750A1 (en) * 2004-08-09 2006-02-23 Reisacher, Raimund, Dr.-Ing. Vineyard post

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH469234A (en) * 1967-01-12 1969-02-28 Ygnis Sa Process for burning, in particular, liquid or gaseous fuels and heating boilers for carrying out the process
FR2036987A1 (en) * 1969-04-28 1970-12-31 Barrault Rene
FR2371642A1 (en) * 1976-11-19 1978-06-16 Leblanc Sa E L M Hot water boiler for central heating - has finned surface of heat exchange arranged to keep flue gas temp. constant
US4222350A (en) * 1978-06-26 1980-09-16 Boston Gas Products, Inc. Efficient heating and domestic hot water apparatus
GB2049126A (en) * 1979-02-23 1980-12-17 Hamworthy Engineering Boiler

Also Published As

Publication number Publication date
EP0063079A1 (en) 1982-10-20
FR2503332B1 (en) 1986-05-16
FR2503332A1 (en) 1982-10-08
DE3261106D1 (en) 1984-12-06

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