EP1491818B1 - Burner with catalytic combustion in porous material and bottle equipped with the same - Google Patents

Burner with catalytic combustion in porous material and bottle equipped with the same Download PDF

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Publication number
EP1491818B1
EP1491818B1 EP04291475A EP04291475A EP1491818B1 EP 1491818 B1 EP1491818 B1 EP 1491818B1 EP 04291475 A EP04291475 A EP 04291475A EP 04291475 A EP04291475 A EP 04291475A EP 1491818 B1 EP1491818 B1 EP 1491818B1
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EP
European Patent Office
Prior art keywords
burner
zone
catalyst
catalytic combustion
peripheral surface
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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
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EP04291475A
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German (de)
French (fr)
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EP1491818A1 (en
Inventor
Corinne Gomez
Jannick Lehoux
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Produits Berger SAS
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Produits Berger SAS
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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 
    • F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D3/00—Burners using capillary action
    • F23D3/02—Wick burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/03081—Catalytic wick burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/31002—Wick burners with flame spreaders or burner hood
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/31004—Wick burners using alcohol as a fuel

Definitions

  • the present invention relates to a catalytic combustion burner made of porous material adapted to cooperate with a wick intended to supply the burner with a combustible composition which penetrates into the pores of said porous material, said burner comprising a peripheral zone which supports a catalyst and which surrounds a central zone without catalyst forming vaporization zone, the peripheral zone and the central zone being located in the upper part of the burner.
  • Such catalytic combustion burners in particular described in application WO 99/63267, conventionally have a substantially cylindrical peripheral surface.
  • the object of the present invention is therefore to overcome the aforementioned drawback of known burners and to provide a burner of the aforementioned type whose demolding is facilitated and which also has improved functional characteristics.
  • this catalytic combustion burner has a frustoconical peripheral surface which flares upwards.
  • the frustoconical structure allows easier removal of the burner without damaging the peripheral surface of the burner.
  • the frustoconical burner of the invention has a peripheral surface exchange greater dimension than that of a burner of the prior art having a peripheral surface of substantially cylindrical shape.
  • the heat exchange is greater during the implementation of a burner according to the invention, the air located near the burner, more heated, rises faster and consequently generates convection currents. more dynamic.
  • the half-angle at the top of the frustoconical peripheral surface of the burner is between 10 ° and 40 °, advantageously between 15 ° and 25 °, and preferably between 18 ° and 23 °.
  • the frustoconical peripheral surface of the burner has at least a first substantially peripheral shoulder and directed inwards and downwards to increase the diameter between a lower portion and an upper portion of the burner.
  • Such a structure makes it possible to further increase the exchange surface between the hot air and the burner and reinforces the contact between the rising hot air and at least a part of the peripheral surface of the burner, and therefore the thermal and chemical exchanges. .
  • a second aspect of the invention also relates to a catalytic combustion flask adapted to contain a liquid fuel composition and to receive, at its neck, a catalytic combustion burner adapted to cooperate with a wick dipping in said composition.
  • this bottle is equipped with a burner according to the first aspect of the invention.
  • FIGS. 1 to 5 are identified by identical reference numerals.
  • FIG. 1 shows a catalytic combustion flask 1 adapted to contain a liquid fuel composition 2 and to receive, at its upper part, a catalytic combustion burner 3 according to the invention.
  • This bottle 1 can be of any shape and has a neck 4 adapted to receive the catalytic burner 3.
  • the catalytic combustion burner 3 is made of a suitable porous material and adapted to withstand the temperatures of at least 400 ° C reached in the zone carrying the catalyst during the operation of the burner 3.
  • This material may in particular be a ceramic material, and for example prepared from kaolin or cordierite.
  • the catalytic combustion burner 3 is adapted to cooperate with a wick 5 dipping in said composition 2. This wick 5 is intended to bring to the burner 3 the fuel composition 2 which penetrates into the pores of the porous material.
  • the fuel composition 2 is a suitable fuel liquid, in accordance with the regulations in force and adapted to catalytic combustion and vaporization.
  • This combustible composition 2 may in particular be an alcohol, in particular isopropyl alcohol, and may further comprise a scented material and / or an active material.
  • the wick 5 is any known wick, for example a cotton wick.
  • the wick 5 may also be a wick of mineral material, for example a wick of mineral fibers, or a wick of porous material.
  • the catalytic combustion burner 3 may be provided at its lower part with a support (not shown) for its introduction, either directly into the neck 4 of the bottle 1, or into the central hole of a base (not shown). , the latter being adapted to be fixed at the neck 4 of the bottle 1.
  • the catalytic burner 3 has a solid structure and a frustoconical peripheral surface 3a which flares upwards.
  • This burner 3 comprises, at its upper part 3b, a peripheral zone 6, for example of annular shape, which supports a catalyst 7 and which surrounds a central zone 8 without catalyst forming vaporization zone.
  • the catalyst 7 is for example a metal belonging to group VIII of the periodic table of the elements.
  • the half-angle A at the top of the frustoconical peripheral surface 3a of the burner 3 is between 10 ° and 40 °, advantageously between 15 ° and 25 °, and preferably between 18 ° and 23 °.
  • the catalytic combustion burner 3 of FIG. 2 may be combined with a sleeve 9 so as to form a catalytic combustion system, such as the catalytic combustion system 10 shown in FIG.
  • This sleeve 9 is disposed in the extension of the lower part 3c of the burner 3.
  • This sleeve 9 is also made of a porous material, which may in particular be a ceramic material, for example prepared from kaolin or cordierite.
  • This sleeve 9 comprises a substantially axial cavity 11 adapted to grip the wick 5 in such a way that the fuel composition 2 can migrate from the pores of the upper part 9a of the sleeve 9 to the pores of the lower part 3c of the burner 3.
  • the junction between the lower parts 3c of the burner 3 and upper 9a of the sleeve 9 must be such that the migration of the fuel composition 2 of the sleeve 9 to the burner 3 is ensured. It is thus possible to provide mechanical interlocking and / or assembly by means of a porous seal.
  • FIG. 4 shows two half-views of a catalytic combustion burner 13 according to a second embodiment of the invention.
  • This burner 13 has a peripheral surface 13a of frustoconical shape which flares upwards.
  • This peripheral surface 13a has at least a first shoulder 14a, 14b substantially peripheral and directed inwardly and downwardly of said burner 13.
  • This first shoulder 14a, 14b has the effect of increasing the diameter between a lower portion 13c and an upper portion 13b of the burner 13.
  • the first shoulder 14a is formed in the substantially middle portion of the burner 13.
  • the first shoulder 14b is formed in the lower part 13c of the burner 13.
  • the first shoulder can obviously be located at a height different from those shown on the two half-views of Figure 4.
  • the deposition of the catalyst was made up to the first shoulder 14a, which thus separates the peripheral zone 16 supporting the catalyst 7 from the lower part 13c the catalyst-free burner 13 at the peripheral surface 13a of the burner 13.
  • the first shoulder 14b does not correspond to a demarcation zone for the location of the catalyst 7 at the peripheral surface 13a of the burner 13.
  • This first shoulder 14b is located in a part of the burner 13 which has no catalyst.
  • the burner 13 comprises, at least at its lower part 13c, a cavity 15 substantially axial, open downwards, adapted to receive, over all or part of its height, the upper end 5a of the wick 5 intended to bring at the burner 13 the combustible composition 2.
  • the end 5a of the wick 5 only partially fills the volume of the cavity 15 of the burner 13. However, it is quite possible to provide that this end 5a substantially completely fills said cavity 15, as in the case of the burner 23 shown in FIG.
  • the cavity 15, which opens at the lower end 3d of the burner 13, extends axially over a large part of the axial dimension of the burner 13.
  • This cavity 15 is closed, at the top 13b of the burner 13, by a wall 17.
  • the burner 13 has a substantially axial annular groove 19 extending from the upper surface 13e of the burner 13 downwards and separating the substantially annular peripheral zone 16 which supports the catalyst 7, of the central zone 18 of the upper part 13b of the burner 13.
  • this catalytic combustion burner 23 has a frustoconical peripheral surface 23a which flares upwards.
  • the upper part 23b of the burner 23 comprises an annular peripheral zone 26 supporting the catalyst 7 and surrounding a central zone 28 without catalyst, as well as a cavity 25.
  • the upper part 25a of the cavity 25 communicates with the atmosphere by the presence of at least one open channel 29 formed, for example, in the upper part 23b of the burner 23.
  • the channel 29 is located in the center of the central zone 28 and formed substantially axially.
  • This channel 29 has a cross section narrower than the cross section of the cavity 25 of the burner 23, so that the cavity 25 is closed at least partially, at the top 23b of the burner 23, by a wall 27 located in the central area 28.
  • the peripheral surface 23a has a first substantially peripheral shoulder 24 and a second substantially peripheral shoulder 30.
  • Each shoulder 24, 30 separates a portion of the burner 23, which is immediately larger and has a larger diameter, of another part of the burner 23, which is immediately below it and which is smaller in diameter.
  • this first shoulder 24 separates, at the level of the peripheral surface 23a of the burner 23, the annular peripheral zone 26 supporting the catalyst 7 of the lower part 23c of the burner 23 without catalyst 7.
  • Such a structural arrangement makes it possible to precisely determine the area of the burner 23 on which the catalyst 7 must be deposited.
  • the burners 13 and 23 shown in FIGS. 4 and 5 may be provided with a sleeve such as the sleeve 9 shown in FIG.
  • annular groove such as the annular groove 19 of FIG. 2, to separate the annular peripheral zones 6 and 26 from the central zones 8 and 28 of the burners 3 and 23, represented respectively in FIGS. part, and 5 on the other hand.
  • the upper part of the cavity 15 of the burner 13 of FIG. 4 is connected to the atmosphere by a channel, such as that represented in FIG. 5 and having the reference 29.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Wick-Type Burners And Burners With Porous Materials (AREA)
  • Spray-Type Burners (AREA)
  • Catalysts (AREA)
  • Gas Burners (AREA)

Abstract

The burner has a peripheral zone (16) which supports a catalyst (7) and surrounds a central zone (18) without the catalyst forming a vaporization zone. The zones (16, 18) are situated in an upper part (13b) of the burner. A peripheral surface (13a) in the tapered form widens out towards the top. An axial annular throat (19) extends from an upper surface (13e) and separates the zones. An independent claim is also included for a catalytic combustion flask.

Description

La présente invention concerne un brûleur à combustion catalytique en matière poreuse adapté à coopérer avec une mèche destinée à amener au brûleur une composition combustible qui pénètre dans les pores de ladite matière poreuse, ledit brûleur comportant une zone périphérique qui supporte un catalyseur et qui entoure une zone centrale sans catalyseur formant zone de vaporisation, la zone périphérique et la zone centrale étant situées dans la partie supérieure du brûleur.The present invention relates to a catalytic combustion burner made of porous material adapted to cooperate with a wick intended to supply the burner with a combustible composition which penetrates into the pores of said porous material, said burner comprising a peripheral zone which supports a catalyst and which surrounds a central zone without catalyst forming vaporization zone, the peripheral zone and the central zone being located in the upper part of the burner.

De tels brûleurs à combustion catalytique, notamment décrits dans la demande WO 99/63267, présentent de manière classique une surface périphérique de forme sensiblement cylindrique.Such catalytic combustion burners, in particular described in application WO 99/63267, conventionally have a substantially cylindrical peripheral surface.

Toutefois, la fabrication de brûleurs dotés d'une telle surface périphérique de forme sensiblement cylindrique est relativement délicate.However, the manufacture of burners with such a substantially cylindrical peripheral surface surface is relatively delicate.

En effet, lors de l'étape de démoulage, de nombreuses pièces doivent être mises au rebut, car elles présentent certaines zones fragilisées, notamment au niveau de la périphérie du brûleur.Indeed, during the demolding step, many parts must be discarded because they have some weakened areas, especially at the periphery of the burner.

Même une légère conicité, de l'ordre de 1° ou 2°, s'évasant vers le haut, conférée classiquement à la surface périphérique du brûleur, ne permet pas de répondre de manière complètement satisfaisante aux difficultés rencontrées lors du démoulage mentionnées ci-dessus.Even a slight taper, of the order of 1 ° or 2 °, flaring upwards, conventionally conferred on the peripheral surface of the burner, does not provide a completely satisfactory response to the difficulties encountered during demolding mentioned above. above.

Le but de la présente invention est donc de remédier à l'inconvénient précité des brûleurs connus et de proposer un brûleur du type précité dont le démoulage est facilité et qui présente en outre des caractéristiques fonctionnelles améliorées.The object of the present invention is therefore to overcome the aforementioned drawback of known burners and to provide a burner of the aforementioned type whose demolding is facilitated and which also has improved functional characteristics.

Selon un premier aspect de l'invention, ce brûleur à combustion catalytique présente une surface périphérique de forme tronconique qui s'évase vers le haut.According to a first aspect of the invention, this catalytic combustion burner has a frustoconical peripheral surface which flares upwards.

Il s'agit bien entendu d'une forme tronconique nettement marquée par opposition à la légère conicité précitée.This is of course a frustoconical shape clearly marked in opposition to the aforementioned slight conicity.

Ainsi, la structure tronconique permet un démoulage plus aisé du brûleur, sans détérioration de la surface périphérique du brûleur.Thus, the frustoconical structure allows easier removal of the burner without damaging the peripheral surface of the burner.

En outre, lors d'essais comparatifs de fonctionnement d'un brûleur selon l'invention avec les brûleurs de structure cylindrique de l'art antérieur, la demanderesse a pu mesurer qu'elle obtenait de meilleurs résultats en termes de destruction d'odeurs avec un flacon à combustion catalytique doté d'un brûleur de structure tronconique.In addition, during comparative tests of operation of a burner according to the invention with the cylindrical structure burners of the prior art, the Applicant was able to measure that it obtained better results in terms of odor destruction with a catalytic combustion flask provided with a frustoconical structure burner.

En effet, on comprend que, par construction et pour une hauteur de brûleur comparable, le brûleur tronconique de l'invention présente une surface périphérique d'échange de dimension plus importante que celle d'un brûleur de l'art antérieur présentant une surface périphérique de forme sensiblement cylindrique.Indeed, it is understood that, by construction and for a comparable burner height, the frustoconical burner of the invention has a peripheral surface exchange greater dimension than that of a burner of the prior art having a peripheral surface of substantially cylindrical shape.

Dans le cas d'un brûleur de surface périphérique de forme sensiblement cylindrique, l'air qui circule à proximité immédiate de la surface périphérique du brûleur s'échauffe au contact de cette surface et s'élève verticalement et parallèlement à ladite surface du brûleur. Il ne se produit donc qu'un contact léger entre cet air chaud et la surface périphérique du brûleur et ce, même dans le cas où l'on observe une légère conicité de l'ordre de 1° ou 2° conférant un très léger évasement vers le haut à un tel brûleur. Les échanges thermiques et chimiques entre la surface périphérique du brûleur et l'air sont donc limités.In the case of a substantially cylindrical peripheral surface burner, the air flowing in the immediate vicinity of the peripheral surface of the burner heats in contact with this surface and rises vertically and parallel to said surface of the burner. There is therefore only a slight contact between this hot air and the peripheral surface of the burner and this, even in the case where there is a slight taper of the order of 1 ° or 2 ° conferring a very slight flaring up to such a burner. Thermal and chemical exchanges between the peripheral surface of the burner and the air are therefore limited.

Au contraire, dans le cas d'un brûleur de même hauteur mais présentant une surface périphérique de forme tronconique, l'air chaud circulant verticalement à proximité du brûleur entre plus fortement en contact avec la surface périphérique tronconique du brûleur, favorisant ainsi les échanges thermiques et chimiques, et donc la destruction catalytique des fumées et autres composants véhiculés par cet air chaud, permettant ainsi un meilleur assainissement de l'air ambiant.On the contrary, in the case of a burner of the same height but having a peripheral surface of frustoconical shape, the hot air flowing vertically near the burner between more strongly in contact with the frustoconical peripheral surface of the burner, thereby promoting heat exchange. and chemical, and thus the catalytic destruction of fumes and other components carried by this hot air, thus allowing a better sanitation of the ambient air.

En outre, les échanges thermiques étant plus importants lors de la mise en oeuvre d'un brûleur selon l'invention, l'air situé à proximité du brûleur, plus fortement chauffé, s'élève plus rapidement et génère en conséquence des courants de convection plus dynamiques.In addition, the heat exchange is greater during the implementation of a burner according to the invention, the air located near the burner, more heated, rises faster and consequently generates convection currents. more dynamic.

On observe donc une meilleure convection des flux gazeux, tant de l'air que des gaz résultant de la vaporisation de la composition combustible, au niveau de l'environnement immédiat de la surface périphérique de forme tronconique du brûleur.There is therefore a better convection of the gas flows, both air and gases resulting from the vaporization of the fuel composition, in the immediate environment of the frustoconical peripheral surface of the burner.

De préférence, le demi-angle au sommet de la surface périphérique de forme tronconique du brûleur est compris entre 10° et 40°, avantageusement entre 15° et 25°, et préférentiellement entre 18° et 23°.Preferably, the half-angle at the top of the frustoconical peripheral surface of the burner is between 10 ° and 40 °, advantageously between 15 ° and 25 °, and preferably between 18 ° and 23 °.

Selon une version avantageuse de l'invention, la surface périphérique de forme tronconique du brûleur présente au moins un premier épaulement sensiblement périphérique et dirigé vers l'intérieur et vers le bas pour augmenter le diamètre entre une partie inférieure et une partie supérieure du brûleur.According to an advantageous version of the invention, the frustoconical peripheral surface of the burner has at least a first substantially peripheral shoulder and directed inwards and downwards to increase the diameter between a lower portion and an upper portion of the burner.

Une telle structure permet d'augmenter encore la surface d'échange entre l'air chaud et le brûleur et renforce le contact entre l'air chaud ascendant et au moins une partie de la surface périphérique du brûleur, et donc les échanges thermiques et chimiques.Such a structure makes it possible to further increase the exchange surface between the hot air and the burner and reinforces the contact between the rising hot air and at least a part of the peripheral surface of the burner, and therefore the thermal and chemical exchanges. .

Un second aspect de l'invention concerne également un flacon à combustion catalytique, adapté à contenir une composition combustible liquide et à recevoir, au niveau de son goulot, un brûleur à combustion catalytique adapté à coopérer avec une mèche trempant dans ladite composition.A second aspect of the invention also relates to a catalytic combustion flask adapted to contain a liquid fuel composition and to receive, at its neck, a catalytic combustion burner adapted to cooperate with a wick dipping in said composition.

Suivant l'invention, ce flacon est équipé d'un brûleur selon le premier aspect de l'invention.According to the invention, this bottle is equipped with a burner according to the first aspect of the invention.

D'autres particularités et avantages de la présente invention apparaîtront dans la description détaillée ci-après.Other features and advantages of the present invention will become apparent from the detailed description hereinafter.

Aux dessins annexés, donnés uniquement à titre d'exemples non limitatifs :

  • la figure 1 est une vue schématique en élévation d'un flacon équipé d'un brûleur à combustion catalytique selon un premier mode de réalisation de la présente invention ;
  • la figure 2 est une vue schématique agrandie en coupe axiale du brûleur représenté à la figure 1 ;
  • la figure 3 est une vue du brûleur représenté à la figure 2 pourvu d'un manchon ;
  • la figure 4 est une vue semblable à la figure 2 d'un second mode de réalisation du brûleur selon la présente invention et comportant deux demi-vues montrant deux variantes de positionnement du premier épaulement ; et
  • la figure 5 est une vue semblable à la figure 2 d'un troisième mode de réalisation du brûleur selon la présente invention.
In the accompanying drawings, given solely by way of non-limiting examples:
  • Figure 1 is a schematic elevational view of a bottle equipped with a catalytic burner according to a first embodiment of the present invention;
  • Figure 2 is an enlarged schematic view in axial section of the burner shown in Figure 1;
  • Figure 3 is a view of the burner shown in Figure 2 provided with a sleeve;
  • Figure 4 is a view similar to Figure 2 of a second embodiment of the burner according to the present invention and having two half-views showing two variants of positioning of the first shoulder; and
  • Figure 5 is a view similar to Figure 2 of a third embodiment of the burner according to the present invention.

Les éléments communs aux figures 1 à 5 sont identifiés par des références numériques identiques.The elements common to FIGS. 1 to 5 are identified by identical reference numerals.

Sur la figure 1, on a représenté un flacon à combustion catalytique 1 adapté à contenir une composition combustible liquide 2 et à recevoir, à sa partie supérieure, un brûleur à combustion catalytique 3 conforme à l'invention.FIG. 1 shows a catalytic combustion flask 1 adapted to contain a liquid fuel composition 2 and to receive, at its upper part, a catalytic combustion burner 3 according to the invention.

Ce flacon 1 peut être de forme quelconque et présente un goulot 4 apte à recevoir le brûleur à combustion catalytique 3.This bottle 1 can be of any shape and has a neck 4 adapted to receive the catalytic burner 3.

Le brûleur à combustion catalytique 3 est réalisé en une matière poreuse appropriée et adaptée à résister aux températures d'au moins 400°C atteintes dans la zone supportant le catalyseur pendant le fonctionnement du brûleur 3. Cette matière peut notamment être une matière céramique, et par exemple préparée à partir de kaolin ou de cordiérite.The catalytic combustion burner 3 is made of a suitable porous material and adapted to withstand the temperatures of at least 400 ° C reached in the zone carrying the catalyst during the operation of the burner 3. This material may in particular be a ceramic material, and for example prepared from kaolin or cordierite.

Le brûleur à combustion catalytique 3 est adapté à coopérer avec une mèche 5 trempant dans ladite composition 2. Cette mèche 5 est destinée à amener au brûleur 3 la composition combustible 2 qui pénètre dans les pores de la matière poreuse.The catalytic combustion burner 3 is adapted to cooperate with a wick 5 dipping in said composition 2. This wick 5 is intended to bring to the burner 3 the fuel composition 2 which penetrates into the pores of the porous material.

La composition combustible 2 est un liquide combustible approprié, conforme aux réglementations en vigueur et adapté à la combustion catalytique et à la vaporisation.The fuel composition 2 is a suitable fuel liquid, in accordance with the regulations in force and adapted to catalytic combustion and vaporization.

Cette composition combustible 2 peut notamment être un alcool, en particulier l'alcool isopropylique, et peut comprendre en outre une matière parfumée et/ou une matière active.This combustible composition 2 may in particular be an alcohol, in particular isopropyl alcohol, and may further comprise a scented material and / or an active material.

La mèche 5 est une mèche connue quelconque, par exemple une mèche en coton.The wick 5 is any known wick, for example a cotton wick.

La mèche 5 peut également être une mèche en matière minérale, par exemple une mèche en fibres minérales, ou une mèche en matière poreuse.The wick 5 may also be a wick of mineral material, for example a wick of mineral fibers, or a wick of porous material.

Le brûleur à combustion catalytique 3 peut être doté, à sa partie inférieure, d'un support (non représenté) permettant son introduction, soit directement dans le goulot 4 du flacon 1, soit dans le trou central d'une embase (non représentée), cette dernière étant adaptée à être fixée au niveau du goulot 4 du flacon 1.The catalytic combustion burner 3 may be provided at its lower part with a support (not shown) for its introduction, either directly into the neck 4 of the bottle 1, or into the central hole of a base (not shown). , the latter being adapted to be fixed at the neck 4 of the bottle 1.

Des support et embase convenant pour la fixation, sur le flacon 1, d'un tel brûleur 3 ont notamment été décrits dans la demande WO 99/63267.Support and base suitable for fixing, on the bottle 1, such a burner 3 have been described in particular in the application WO 99/63267.

Comme représenté à la figure 2, le brûleur à combustion catalytique 3 présente une structure pleine ainsi qu'une surface périphérique 3a de forme tronconique qui s'évase vers le haut.As shown in Figure 2, the catalytic burner 3 has a solid structure and a frustoconical peripheral surface 3a which flares upwards.

Ce brûleur 3 comporte, au niveau de sa partie supérieure 3b, une zone périphérique 6, par exemple de forme annulaire, qui supporte un catalyseur 7 et qui entoure une zone centrale 8 sans catalyseur formant zone de vaporisation.This burner 3 comprises, at its upper part 3b, a peripheral zone 6, for example of annular shape, which supports a catalyst 7 and which surrounds a central zone 8 without catalyst forming vaporization zone.

Le catalyseur 7 est par exemple un métal appartenant au groupe VIII du tableau de classification périodique des éléments.The catalyst 7 is for example a metal belonging to group VIII of the periodic table of the elements.

Le demi-angle A au sommet de la surface périphérique 3a de forme tronconique du brûleur 3 est compris entre 10° et 40°, avantageusement entre 15° et 25°, et préférentiellement entre 18° et 23°.The half-angle A at the top of the frustoconical peripheral surface 3a of the burner 3 is between 10 ° and 40 °, advantageously between 15 ° and 25 °, and preferably between 18 ° and 23 °.

Le brûleur à combustion catalytique 3 de la figure 2 peut être combiné à un manchon 9 de manière à former un système à combustion catalytique, tel que le système à combustion catalytique 10 représenté sur la figure 3.The catalytic combustion burner 3 of FIG. 2 may be combined with a sleeve 9 so as to form a catalytic combustion system, such as the catalytic combustion system 10 shown in FIG.

Ce manchon 9 est disposé dans le prolongement de la partie inférieure 3c du brûleur 3.This sleeve 9 is disposed in the extension of the lower part 3c of the burner 3.

Ce manchon 9 est également réalisé en une matière poreuse, qui peut notamment être une matière céramique, par exemple préparée à partir de kaolin ou de cordiérite.This sleeve 9 is also made of a porous material, which may in particular be a ceramic material, for example prepared from kaolin or cordierite.

Ce manchon 9 comporte une cavité 11 sensiblement axiale adaptée à enserrer la mèche 5 de manière telle que la composition combustible 2 peut migrer des pores de la partie supérieure 9a du manchon 9 vers les pores de la partie inférieure 3c du brûleur 3.This sleeve 9 comprises a substantially axial cavity 11 adapted to grip the wick 5 in such a way that the fuel composition 2 can migrate from the pores of the upper part 9a of the sleeve 9 to the pores of the lower part 3c of the burner 3.

La jonction entre les parties inférieure 3c du brûleur 3 et supérieure 9a du manchon 9 doit être telle que la migration de la composition combustible 2 du manchon 9 vers le brûleur 3 est assurée. On peut ainsi prévoir un emboîtement mécanique et/ou un assemblage au moyen d'un scellement poreux.The junction between the lower parts 3c of the burner 3 and upper 9a of the sleeve 9 must be such that the migration of the fuel composition 2 of the sleeve 9 to the burner 3 is ensured. It is thus possible to provide mechanical interlocking and / or assembly by means of a porous seal.

On peut également prévoir de réaliser le système à combustion catalytique 10 en une seule et unique pièce comprenant le brûleur 3 et le manchon 9.It is also possible to provide the catalytic combustion system 10 in a single piece comprising the burner 3 and the sleeve 9.

Sur la figure 4, on a représenté deux demi-vues d'un brûleur à combustion catalytique 13 selon un second mode de réalisation de l'invention.FIG. 4 shows two half-views of a catalytic combustion burner 13 according to a second embodiment of the invention.

Ce brûleur 13 présente une surface périphérique 13a de forme tronconique qui s'évase vers le haut.This burner 13 has a peripheral surface 13a of frustoconical shape which flares upwards.

Chaque demi-vue montre que cette surface périphérique 13a présente au moins un premier épaulement 14a, 14b sensiblement périphérique et dirigé vers l'intérieur et vers le bas du dit brûleur 13.Each half-view shows that this peripheral surface 13a has at least a first shoulder 14a, 14b substantially peripheral and directed inwardly and downwardly of said burner 13.

Ce premier épaulement 14a, 14b a pour effet d'augmenter le diamètre entre une partie inférieure 13c et une partie supérieure 13b du brûleur 13.This first shoulder 14a, 14b has the effect of increasing the diameter between a lower portion 13c and an upper portion 13b of the burner 13.

Sur la demi-vue de gauche, le premier épaulement 14a est ménagé dans la partie sensiblement médiane du brûleur 13.On the left half-view, the first shoulder 14a is formed in the substantially middle portion of the burner 13.

Sur la demi-vue de droite, le premier épaulement 14b est ménagé dans la partie inférieure 13c du brûleur 13.On the half-view on the right, the first shoulder 14b is formed in the lower part 13c of the burner 13.

Le premier épaulement peut bien évidemment être situé au niveau d'une hauteur différente de celles représentées sur les deux demi-vues de la figure 4.The first shoulder can obviously be located at a height different from those shown on the two half-views of Figure 4.

Comme représenté sur la demi-vue de gauche, le dépôt du catalyseur a été réalisé jusqu'au premier épaulement 14a, qui sépare donc la zone périphérique 16 supportant le catalyseur 7 de la partie inférieure 13c du brûleur 13 dépourvue de catalyseur, au niveau de la surface périphérique 13a du brûleur 13.As shown in the left half-view, the deposition of the catalyst was made up to the first shoulder 14a, which thus separates the peripheral zone 16 supporting the catalyst 7 from the lower part 13c the catalyst-free burner 13 at the peripheral surface 13a of the burner 13.

Au contraire, sur la demi-vue de droite, le premier épaulement 14b ne correspond pas à une zone de démarcation pour la localisation du catalyseur 7 au niveau de la surface périphérique 13a du brûleur 13. Ce premier épaulement 14b est situé dans une partie du brûleur 13 qui ne comporte pas de catalyseur.On the contrary, on the half-view on the right, the first shoulder 14b does not correspond to a demarcation zone for the location of the catalyst 7 at the peripheral surface 13a of the burner 13. This first shoulder 14b is located in a part of the burner 13 which has no catalyst.

Le brûleur 13 comporte, au moins au niveau de sa partie inférieure 13c, une cavité 15 sensiblement axiale, ouverte vers le bas, adaptée à recevoir, sur tout ou partie de sa hauteur, l'extrémité supérieure 5a de la mèche 5 destinée à amener au brûleur 13 la composition combustible 2.The burner 13 comprises, at least at its lower part 13c, a cavity 15 substantially axial, open downwards, adapted to receive, over all or part of its height, the upper end 5a of the wick 5 intended to bring at the burner 13 the combustible composition 2.

Comme montré sur la figure 4, l'extrémité 5a de la mèche 5 ne remplit que partiellement le volume de la cavité 15 du brûleur 13. Il est cependant tout à fait possible de prévoir que cette extrémité 5a remplisse sensiblement entièrement ladite cavité 15, comme dans le cas du brûleur 23 représenté à la figure 5.As shown in FIG. 4, the end 5a of the wick 5 only partially fills the volume of the cavity 15 of the burner 13. However, it is quite possible to provide that this end 5a substantially completely fills said cavity 15, as in the case of the burner 23 shown in FIG.

Sur la représentation de la figure 4, la cavité 15, qui débouche à l'extrémité inférieure 3d du brûleur 13, s'étend axialement sur une grande partie de la dimension axiale du brûleur 13.In the representation of FIG. 4, the cavity 15, which opens at the lower end 3d of the burner 13, extends axially over a large part of the axial dimension of the burner 13.

Cette cavité 15 est fermée, au niveau de la partie supérieure 13b du brûleur 13, par une paroi 17.This cavity 15 is closed, at the top 13b of the burner 13, by a wall 17.

Comme représenté à la figure 4, et de façon classique, le brûleur 13 présente une gorge annulaire 19 sensiblement axiale s'étendant depuis la surface supérieure 13e du brûleur 13 vers le bas et séparant la zone périphérique 16 sensiblement annulaire qui supporte le catalyseur 7, de la zone centrale 18 de la partie supérieure 13b du brûleur 13.As represented in FIG. 4, and in a conventional manner, the burner 13 has a substantially axial annular groove 19 extending from the upper surface 13e of the burner 13 downwards and separating the substantially annular peripheral zone 16 which supports the catalyst 7, of the central zone 18 of the upper part 13b of the burner 13.

Cette structure particulière de la partie supérieure 13b d'un tel brûleur 13 munie d'une gorge annulaire 19 a notamment été décrite dans le brevet EP 0 277 875 B1 au nom de la demanderesse.This particular structure of the upper part 13b of such a burner 13 provided with a groove Annular 19 has in particular been described in patent EP 0 277 875 B1 in the name of the applicant.

Sur la figure 5, on a représenté un brûleur à combustion catalytique selon un troisième mode de réalisation de l'invention.In Figure 5, there is shown a catalytic combustion burner according to a third embodiment of the invention.

Comme dans les figures précédentes, ce brûleur à combustion catalytique 23 présente une surface périphérique 23a de forme tronconique qui s'évase vers le haut.As in the previous figures, this catalytic combustion burner 23 has a frustoconical peripheral surface 23a which flares upwards.

La partie supérieure 23b du brûleur 23 comporte une zone périphérique annulaire 26 supportant le catalyseur 7 et entourant une zone centrale 28 sans catalyseur, ainsi qu'une cavité 25.The upper part 23b of the burner 23 comprises an annular peripheral zone 26 supporting the catalyst 7 and surrounding a central zone 28 without catalyst, as well as a cavity 25.

La partie supérieure 25a de la cavité 25 communique avec l'atmosphère par la présence d'au moins un canal 29 ouvert, ménagé par exemple dans la partie supérieure 23b du brûleur 23.The upper part 25a of the cavity 25 communicates with the atmosphere by the presence of at least one open channel 29 formed, for example, in the upper part 23b of the burner 23.

Sur la présente figure 5, le canal 29 est situé au centre de la zone centrale 28 et ménagé sensiblement axialement. Toutefois, rien n'interdit d'envisager d'autres dispositions pour ce canal 29, en particulier la disposition particulière représentée à la figure 8 du document WO 99/63267.In the present Figure 5, the channel 29 is located in the center of the central zone 28 and formed substantially axially. However, nothing precludes consideration of other arrangements for this channel 29, in particular the particular arrangement shown in FIG. 8 of WO 99/63267.

Ce canal 29 présente une section transversale plus étroite que la section transversale de la cavité 25 du brûleur 23, de sorte que la cavité 25 est fermée au moins partiellement, au niveau de la partie supérieure 23b du brûleur 23, par une paroi 27 située dans la zone centrale 28.This channel 29 has a cross section narrower than the cross section of the cavity 25 of the burner 23, so that the cavity 25 is closed at least partially, at the top 23b of the burner 23, by a wall 27 located in the central area 28.

La surface périphérique 23a comporte une premier épaulement 24 sensiblement périphérique ainsi qu'un second épaulement 30 sensiblement périphérique.The peripheral surface 23a has a first substantially peripheral shoulder 24 and a second substantially peripheral shoulder 30.

Chaque épaulement 24, 30 sépare une partie du brûleur 23, qui lui est immédiatement supérieure et qui présente un plus grand diamètre, d'une autre partie du brûleur 23, qui lui est immédiatement inférieure et qui est de diamètre plus réduit.Each shoulder 24, 30 separates a portion of the burner 23, which is immediately larger and has a larger diameter, of another part of the burner 23, which is immediately below it and which is smaller in diameter.

Comme représenté sur la figure 5, ce premier épaulement 24 sépare, au niveau de la surface périphérique 23a du brûleur 23, la zone périphérique annulaire 26 supportant le catalyseur 7 de la partie inférieure 23c du brûleur 23 dépourvue de catalyseur 7.As shown in FIG. 5, this first shoulder 24 separates, at the level of the peripheral surface 23a of the burner 23, the annular peripheral zone 26 supporting the catalyst 7 of the lower part 23c of the burner 23 without catalyst 7.

Un tel agencement structurel permet de déterminer précisément la zone du brûleur 23 sur laquelle doit être déposée le catalyseur 7.Such a structural arrangement makes it possible to precisely determine the area of the burner 23 on which the catalyst 7 must be deposited.

On aurait aussi pu prévoir de déposer le catalyseur 7 jusqu'au niveau du second épaulement 30.It could also have been expected to deposit the catalyst 7 to the level of the second shoulder 30.

Bien entendu, la présente invention n'est pas limitée aux modes de réalisation de brûleur que l'on vient de décrire, et on peut apporter à ceux-ci de nombreux changements et modifications sans sortir du domaine de l'invention.Of course, the present invention is not limited to the burner embodiments that have just been described, and can be made to them many changes and modifications without departing from the scope of the invention.

On peut notamment combiner de manière quelconque les différentes caractéristiques structurelles des brûleurs décrits ci-dessus.In particular, the various structural characteristics of the burners described above can be combined in any way.

On peut en particulier doter les brûleurs 13 et 23 représentés aux figures 4 et 5 d'un manchon tel que le manchon 9 représenté à la figure 3.In particular, the burners 13 and 23 shown in FIGS. 4 and 5 may be provided with a sleeve such as the sleeve 9 shown in FIG.

On peut également prévoir une gorge annulaire, telle que la gorge annulaire 19 de la figure 2, pour séparer les zones périphériques annulaires 6 et 26 des zones centrales 8 et 28 des brûleurs 3 et 23, représentés respectivement aux figures 2 et 3 d'une part, et 5 d'autre part.It is also possible to provide an annular groove, such as the annular groove 19 of FIG. 2, to separate the annular peripheral zones 6 and 26 from the central zones 8 and 28 of the burners 3 and 23, represented respectively in FIGS. part, and 5 on the other hand.

De même, on peut prévoir que la partie supérieure de la cavité 15 du brûleur 13 de la figure 4 soit reliée à l'atmosphère par un canal, tel que celui représenté à la figure 5 et comportant la référence 29.Similarly, it can be provided that the upper part of the cavity 15 of the burner 13 of FIG. 4 is connected to the atmosphere by a channel, such as that represented in FIG. 5 and having the reference 29.

On peut également donner aux parties inférieures 3c, 13c et 23c des brûleurs 3, 13 et 23 toute forme appropriée facilitant leur mise en place et leur maintien sur le goulot 4 du flacon 1, soit au moyen ou non d'un support et/ou au moyen ou non d'une embase.It is also possible to give the lower parts 3c, 13c and 23c burners 3, 13 and 23 any suitable form facilitating their installation and their holding on the neck 4 of the bottle 1, either by means or not of a support and / or by means or not of a base.

On rappelle que es support et embase convenant pour la fixation, sur le flacon 1, d'un tel brûleur 3, 13, 23 ont notamment été décrits dans la demande WO 99/63267.It is recalled that the support and base suitable for fixing, on the bottle 1, such a burner 3, 13, 23 have in particular been described in the application WO 99/63267.

Claims (8)

  1. Catalytic combustion burner made from a porous material designed to cooperate with a wick (5) intended to conduct a combustible composition (2) to the burner (3, 13, 23), which composition penetrates into the pores of the said porous material, the said burner (3, 13, 23) comprising a peripheral zone (6, 16, 26) that supports a catalyst (7) and that surrounds a central zone (8, 18, 28) with no catalyst forming a vaporization zone, the peripheral zone (6, 16, 26) and the central zone (8, 18, 28) being located in the upper part (3b, 13b, 23b) of the burner (3, 13, 23), characterized in that the said burner (3, 13, 23) has a peripheral surface (3a, 13a, 23a) of upwardly flaring frustoconical shape.
  2. Burner according to Claim 1, characterized in that the half-angle (A) at the apex of the frustoconical peripheral surface (3a, 13a, 23a) is between 10° and 40°, advantageously between 15° and 25° and preferably between 18° and 23°.
  3. Burner according to Claim 1 or 2, characterized in that the peripheral surface (13a, 23a) of the burner (13, 23) has at least one first shoulder (14a, 14b, 24) substantially around the periphery and facing inwards and downwards in order to increase the diameter between a lower part and an upper part of the burner (13, 23).
  4. Burner according to Claim 3, characterized in that the said first shoulder (14a, 24) separates the peripheral zone (16, 26) supporting the catalyst (7) from the catalyst-free lower part (13c, 23c) of the burner (13, 23).
  5. Burner according to any one of Claims 1 to 4, characterized in that the burner (13) also comprises a substantially axial annular groove (19) extending downwards from the upper surface (13e) of the burner (13) and separating the peripheral zone (16) from the central zone (18).
  6. Burner according to any one of Claims 1 to 5, characterized in that the burner (13, 23) comprises, in its lower part (13c, 23c), a substantially axial cavity (15, 25) open at the bottom and designed to accommodate, over all or part of its height, the upper end (5a) of the wick (5) and at least partially closed at the upper part (13b, 23b) of the burner (13, 23), by a wall (17, 27).
  7. Burner according to Claim 6, characterized in that the upper part (25a) of the cavity (25) communicates with the atmosphere through at least one open channel (29), for example formed in the upper part (23b) of the burner (23).
  8. Catalytic combustion flask, designed to contain a combustible liquid composition (2) and to be fitted, in its neck (4), with a catalytic combustion burner (3, 13, 23) designed to cooperate with a wick (5) dipping into the said composition (2), characterized in that it is provided with a burner (3, 13, 23) according to any one of Claims 1 to 7.
EP04291475A 2003-06-27 2004-06-11 Burner with catalytic combustion in porous material and bottle equipped with the same Expired - Lifetime EP1491818B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0307765 2003-06-27
FR0307765A FR2856775B1 (en) 2003-06-27 2003-06-27 CATALYTIC COMBUSTION BURNER IN POROUS MATERIAL AND BOTTLE EQUIPPED WITH SUCH A BURNER

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EP1491818A1 EP1491818A1 (en) 2004-12-29
EP1491818B1 true EP1491818B1 (en) 2006-08-23

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US (1) US7241136B2 (en)
EP (1) EP1491818B1 (en)
JP (1) JP3814601B2 (en)
KR (1) KR100717614B1 (en)
CN (1) CN1271368C (en)
AT (1) ATE337522T1 (en)
CA (1) CA2470072C (en)
DE (2) DE04291475T1 (en)
ES (1) ES2238209T3 (en)
FR (1) FR2856775B1 (en)
HK (2) HK1056485A2 (en)
MY (1) MY136766A (en)
PT (1) PT1491818E (en)
SG (1) SG126733A1 (en)
TW (1) TWI232918B (en)

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FR2856775B1 (en) 2003-06-27 2005-08-19 Prod Berger CATALYTIC COMBUSTION BURNER IN POROUS MATERIAL AND BOTTLE EQUIPPED WITH SUCH A BURNER
KR100727624B1 (en) * 2005-06-14 2007-06-13 주식회사 아이파워 Catalyst heater without combustion and noise
US20070202450A1 (en) * 2006-02-08 2007-08-30 The Board Of Regents, The University Of Texas System Catalytic burner for combustion of liquid fuels
FR2905165B1 (en) * 2006-08-23 2008-10-10 Prod Berger Soc Par Actions Si CATALYTIC COMBUSTION BURNER HAVING A PARTICULAR BIT AND BOTTLE EQUIPPED WITH SUCH A BURNER.
FR2905164B1 (en) * 2006-08-23 2012-12-21 Prod Berger SILICON CARBIDE COMPOSITION FOR CATALYTIC COMBUSTION BURNER IN POROUS MATERIAL.
FR2905163B1 (en) * 2006-08-23 2008-10-17 Prod Berger Soc Par Actions Si CATALYTIC COMBUSTION BURNER, BURNER SUPPORT DEVICE, AND BURNER - BURNER DEVICE WITH EVENTS.
US10041669B2 (en) * 2006-10-12 2018-08-07 Stonewick, Llc Catalytic burner
WO2008045546A2 (en) * 2006-10-12 2008-04-17 Stonewick, Inc. Catalytic burner
FR2950257B1 (en) 2009-09-22 2012-01-20 Prod Berger ASSEMBLY FOR DIFFUSION OF A COMPOSITION IN THE AIR
GB201321309D0 (en) * 2013-12-03 2014-01-15 Ashleigh & Burwood A Catalytic fragrance burner assembly and a method of manufacture thereof
PT2896407T (en) * 2014-01-15 2019-01-11 Dc & Bv France Holding Sas An apparatus for diffusing a chemical substance
US11877687B2 (en) 2015-07-27 2024-01-23 The United States Of America As Represented By The Secretary Of The Army Heater and cookware for flameless catalytic combustion
US10584869B2 (en) 2015-07-27 2020-03-10 The United States Of America As Represented By The Secretary Of The Army Heater
KR101953846B1 (en) 2016-09-30 2019-03-06 대한민국 flask
FR3061543B1 (en) * 2016-12-30 2019-08-23 Produits Berger CATALYTIC COMBUSTION BURNER IN POROUS MATERIAL WITH OPTIMIZED OPERATING PERFORMANCE AND FLASK EQUIPPED WITH SUCH A BURNER
JP1614249S (en) * 2017-02-13 2018-09-25
FR3090420B1 (en) 2018-12-21 2020-12-11 Berger Produits PROCESS FOR DEPOSITING A CATALYST ON THE SURFACE OF A CATALYTIC COMBUSTION BURNER

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FR2856775B1 (en) 2005-08-19
CA2470072A1 (en) 2004-12-27
CA2470072C (en) 2008-08-19
KR20050005706A (en) 2005-01-14
DE602004002037T2 (en) 2007-02-15
US7241136B2 (en) 2007-07-10
TWI232918B (en) 2005-05-21
US20050037309A1 (en) 2005-02-17
HK1072098A1 (en) 2005-08-12
ES2238209T1 (en) 2005-09-01
ATE337522T1 (en) 2006-09-15
DE04291475T1 (en) 2005-06-23
PT1491818E (en) 2006-12-29
JP2005016925A (en) 2005-01-20
MY136766A (en) 2008-11-28
CN1271368C (en) 2006-08-23
TW200500572A (en) 2005-01-01
DE602004002037D1 (en) 2006-10-05
ES2238209T3 (en) 2007-04-16
CN1576693A (en) 2005-02-09
SG126733A1 (en) 2006-11-29
FR2856775A1 (en) 2004-12-31
HK1056485A2 (en) 2004-01-30
EP1491818A1 (en) 2004-12-29
JP3814601B2 (en) 2006-08-30
KR100717614B1 (en) 2007-05-15

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