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EP2491307A2 - Radiating burner having enhanced performance and method for improving the performance of a radiating burner - Google Patents

Radiating burner having enhanced performance and method for improving the performance of a radiating burner

Info

Publication number
EP2491307A2
EP2491307A2 EP10785484A EP10785484A EP2491307A2 EP 2491307 A2 EP2491307 A2 EP 2491307A2 EP 10785484 A EP10785484 A EP 10785484A EP 10785484 A EP10785484 A EP 10785484A EP 2491307 A2 EP2491307 A2 EP 2491307A2
Authority
EP
European Patent Office
Prior art keywords
inlet
mixture
combustion support
radiant burner
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10785484A
Other languages
German (de)
French (fr)
Other versions
EP2491307B1 (en
Inventor
Stéphane CARPENTIER
David Dupuis
Armelle Cessou
Pierre Vervisch
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.)
Engie SA
Original Assignee
GDF Suez SA
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 GDF Suez SA filed Critical GDF Suez SA
Publication of EP2491307A2 publication Critical patent/EP2491307A2/en
Application granted granted Critical
Publication of EP2491307B1 publication Critical patent/EP2491307B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • 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 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F23C99/001—Applying electric means or magnetism to combustion
    • 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
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate

Definitions

  • the invention relates generally to the field of infrared radiation heating.
  • the invention relates, in a first aspect, to a radiant burner designed to be powered in operation by a mixture of air and fuel gas flow, this burner comprising a body defining a combustion chamber and provided with a inlet for the mixture, a porous combustion support sealing the chamber in an unsealed manner and disposed downstream of the inlet in the flow direction of the mixture, and a distribution metal grid disposed between the inlet of the mixture and the support of combustion.
  • Infrared radiation heating traditionally uses one or other of the two sources of energy that constitute electricity on the one hand and the fuel gas on the other hand.
  • the fuel gas has the advantage of greater ease of storage than electricity but, on the other hand, has a lower efficiency for the production of heat by infrared radiation.
  • the present invention aims to provide a means for increasing the performance of a radiant gas burner.
  • the radiant burner of the invention conforms to the generic definition given by the preamble above is essentially characterized in that the body is made of a dielectric material, in that the burner further comprises an electric generator, first and second electrodes, and first and second galvanic connections, in that the electrical generator is adapted to deliver in operation, between first and second terminals, a voltage having a DC component at least equal to 5 kV, in that the first electrode is disposed on the distribution grid, in that the second electrode is arranged on the combustion support, and in that the first and second galvanic connections respectively connect the first and second electrodes to the first and second terminals of the generator.
  • the first electrode comprises at least one metal point disposed on the distribution grid and oriented along an axis pointing towards the combustion support.
  • the second electrode may be disposed on the combustion support, have the shape of a recessed surface, such as a ring or a window, and surround the axis of the tip.
  • the combustion support may suitably be made of ceramic or metal, the body being for example made of ceramic, and the second electrode of stainless steel.
  • the electrical generator is designed to deliver in operation a DC voltage of between 15 kV and 25 kV.
  • the burner of the invention may also comprise a baffle disposed in the body and a metal pipe, the duct channeling the mixture and opening into the body through said inlet, and this inlet being covered at least partially and unsealed by the baffle .
  • the first terminal of the electrical generator is at ground potential
  • the first galvanic connection comprises a metal cable connecting the metal pipe to the potential of the earth, and a wire connecting the metal pipe to the ground. distribution grid.
  • the invention also relates to a method for improving the efficiency of a radiant burner designed to be fed in operation by a mixture of air and fuel gas flow, this burner comprising a body delimiting a combustion chamber and provided with a inlet for the mixture, a porous combustion support sealing the chamber in an unsealed manner and disposed downstream of the inlet in the flow direction of the mixture, and a distribution grid disposed between the inlet of the mixture and the combustion support
  • this method comprising an operation of creating an electric field in the combustion chamber by applying an electrical potential difference of at least 5 kV between the combustion support and the distribution grid.
  • the invention relates in particular to a radiant burner designed to be fed in operation by a flow F of air mixture and fuel gas.
  • Such a burner typically comprises a body 1, a porous combustion support 2, and a distribution metal grid 3.
  • the body 1, which delimits a combustion chamber 10, is provided with an inlet 11 for mixing.
  • the combustion support 2 closes the chamber 10 in an unsealed manner, and is disposed downstream of the inlet 11 in the direction of the flow F of the mixture.
  • the metal distribution grid 3 is arranged between the inlet 10 of the mixture and the combustion support 2.
  • the body 1 is made of a dielectric material, for example ceramic, and the burner further comprises an electric generator 4, two electrodes 51 and 52, and two galvanic connections 61 and 62.
  • the electric generator 4 which comprises two terminals 41 and 42, is designed to deliver between its terminals, in operation, a voltage having a DC component at least equal to 5 kV.
  • this electrical generator delivers in operation a DC voltage of between 15 kV and 25 kV and typically of the order of 20 kV.
  • the first electrode 51 is disposed on the distribution grid 3, and the second electrode 52, for example made of stainless steel, is arranged on the combustion support 2.
  • the function of the galvanic connections 61 and 62 is to connect the electrodes 51 and 52 respectively to the terminals 41 and 42 of the generator 4.
  • the first electrode 51 consists of a metal tip 51 disposed on the distribution grid 3 and oriented along an axis pointing towards the combustion support 2.
  • the second electrode 52 which has the shape of a recessed surface such as a ring or a window, is arranged on the combustion support 2 and surrounds the axis of the tip 51.
  • the electrodes 51 and 52 may however take other forms.
  • the first electrode 51 may take the form of a plurality of tips, and the shapes of the electrodes 51 and 52 may be interchanged.
  • the combustion support 2 may be made of metal or ceramic, for example cordierite.
  • the burner advantageously also comprises a baffle 7 disposed in the body 1, and a metal pipe 8 may form or include a venturi (not shown) for producing the air / fuel gas mixture.
  • This mixture is channeled into the chamber 10 through the pipe 8 which opens into the body 1 through the inlet 11, this inlet 11 being covered at least partially and unsealed by the deflector 7.
  • the first terminal 41 of the electric generator 4 is at ground potential
  • the first galvanic connection 61 comprises, for example, a cable metal 611 connecting the metal pipe 8 to the potential of the earth, and a wire 612 connecting the metal pipe 8 to the distribution grid 3.
  • a metal grid distribution 3 dimensions 140 mm x 140 mm; this grid was perforated with holes 3 mm in diameter and arranged the chamber 10 at a distance of 50 mm with respect to the inlet 11;
  • a metal pipe 8 provided with a venturi (not shown);
  • an electrode 51 consisting of a metal point disposed in the center of the distribution grid 3;
  • a metal electrode 52 of stainless steel having the shape of a recessed surface such as a ring or a window, being disposed on the contour of the combustion support 2 and being connected to the terminal 42 high voltage generator by a cable 62;

Landscapes

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

Abstract

The invention particularly relates to a method for improving the performance of a radiating burner designed to be supplied during operation by means of a flow (F) comprising a mixture of air and combustible gas; said burner includes a body (1) defining a combustion chamber (10) and provided with an inlet (11) for the mixture; a porous wicking agent (2) closes off the chamber (10) in a non-sealing manner and is arranged downstream of the inlet (11) in the direction of flow (F) of the mixture; and a distribution grid (3) is arranged between the mixture inlet (10) and the wicking agent (2). The method according to the invention includes an operation which comprises creating an electric field in the combustion chamber (10) by applying an electric potential difference of at least 5 kV between the wicking agent (2) and the distribution grid (3).

Description

BRULEUR RADIANT A RENDEMENT ACCRU , ET PROCEDE  RADIANT BURNER WITH INCREASED YIELD AND METHOD

D ' AMELIORATION DU RENDEMENT D ' UN BRULEUR RADIANT . L'invention concerne, de façon générale, le domaine du chauffage par rayonnement infrarouge.  IMPROVING THE EFFICIENCY OF A RADIANT BURNER. The invention relates generally to the field of infrared radiation heating.

Plus précisément, l'invention concerne, selon un premier aspect, un brûleur radiant conçu pour être alimenté en fonctionnement par un flux de mélange d'air et de gaz combustible, ce brûleur comprenant un corps délimitant une chambre de combustion et doté d'une entrée pour le mélange, un support de combustion poreux fermant la chambre de façon non étanche et disposé en aval de l'entrée dans le sens du flux du mélange, et une grille métallique de répartition disposée entre l'entrée du mélange et le support de combustion.  More specifically, the invention relates, in a first aspect, to a radiant burner designed to be powered in operation by a mixture of air and fuel gas flow, this burner comprising a body defining a combustion chamber and provided with a inlet for the mixture, a porous combustion support sealing the chamber in an unsealed manner and disposed downstream of the inlet in the flow direction of the mixture, and a distribution metal grid disposed between the inlet of the mixture and the support of combustion.

Le chauffage par rayonnement infrarouge utilise traditionnellement l'une ou l'autre des deux sources d'énergie que constituent l'électricité d'une part et le gaz combustible d'autre part.  Infrared radiation heating traditionally uses one or other of the two sources of energy that constitute electricity on the one hand and the fuel gas on the other hand.

Chacune de ces deux sources d'énergie (électricité et gaz combustible) présente des avantages spécifiques qui, selon les circonstances, peuvent conduire à en préférer une à l'autre. Par exemple, le gaz combustible présente l'avantage d'une plus grande facilité de stockage que l'électricité mais, en revanche, a un rendement plus faible pour la production de chaleur par rayonnement infrarouge .  Each of these two sources of energy (electricity and fuel gas) has specific advantages that, depending on the circumstances, may lead to prefer one to the other. For example, the fuel gas has the advantage of greater ease of storage than electricity but, on the other hand, has a lower efficiency for the production of heat by infrared radiation.

Dans ce contexte, la présente invention a pour but de proposer un moyen permettant d'augmenter le rendement d'un brûleur radiant à gaz combustible.  In this context, the present invention aims to provide a means for increasing the performance of a radiant gas burner.

A cette fin, le brûleur radiant de l'invention, par ailleurs conforme à la définition générique qu'en donne le préambule ci-dessus, est essentiellement caractérisé en ce que le corps est réalisé dans un matériau diélectrique, en ce que le brûleur comprend en outre un générateur électrique, des première et deuxième électrodes, et des première et deuxième liaisons galvaniques, en ce que le générateur électrique est conçu pour délivrer en fonctionnement, entre des première et deuxième bornes, une tension présentant une composante continue au moins égale à 5 kV, en ce que la première électrode est disposée sur la grille de répartition, en ce que la deuxième électrode est disposée sur le support de combustion, et en ce que les première et deuxième liaisons galvaniques relient respectivement les première et deuxième électrodes aux première et deuxième bornes du générateur. For this purpose, the radiant burner of the invention, moreover, conforms to the generic definition given by the preamble above is essentially characterized in that the body is made of a dielectric material, in that the burner further comprises an electric generator, first and second electrodes, and first and second galvanic connections, in that the electrical generator is adapted to deliver in operation, between first and second terminals, a voltage having a DC component at least equal to 5 kV, in that the first electrode is disposed on the distribution grid, in that the second electrode is arranged on the combustion support, and in that the first and second galvanic connections respectively connect the first and second electrodes to the first and second terminals of the generator.

Dans un mode de réalisation préféré de l'invention, la première électrode comprend au moins une pointe métallique disposée sur la grille de répartition et orientée suivant un axe pointant vers le support de combustion.  In a preferred embodiment of the invention, the first electrode comprises at least one metal point disposed on the distribution grid and oriented along an axis pointing towards the combustion support.

Dans ce cas, la deuxième électrode peut être disposée sur le support de combustion, avoir la forme d'une surface évidée, telle qu'un anneau ou une fenêtre, et entourer l'axe de la pointe.  In this case, the second electrode may be disposed on the combustion support, have the shape of a recessed surface, such as a ring or a window, and surround the axis of the tip.

Le support de combustion peut adéquatement être réalisé en céramique ou en métal, le corps étant quant à lui par exemple réalisé en céramique, et la deuxième électrode en acier inoxydable.  The combustion support may suitably be made of ceramic or metal, the body being for example made of ceramic, and the second electrode of stainless steel.

En pratique, il est souhaitable que le générateur électrique soit conçu pour délivrer en fonctionnement une tension continue comprise entre 15 kV et 25 kV. Le brûleur de l'invention peut aussi comprendre un déflecteur disposé dans le corps et une conduite métallique, la conduite canalisant le mélange et débouchant dans le corps par ladite entrée, et cette entrée étant couverte au moins partiellement et de façon non étanche par le déflecteur. In practice, it is desirable that the electrical generator is designed to deliver in operation a DC voltage of between 15 kV and 25 kV. The burner of the invention may also comprise a baffle disposed in the body and a metal pipe, the duct channeling the mixture and opening into the body through said inlet, and this inlet being covered at least partially and unsealed by the baffle .

Il est également judicieux de prévoir que la première borne du générateur électrique soit au potentiel de la terre, et que la première liaison galvanique comprenne un câble métallique reliant la conduite métallique au potentiel de la terre, et un fil métallique reliant la conduite métallique à la grille de répartition.  It is also wise to provide that the first terminal of the electrical generator is at ground potential, and that the first galvanic connection comprises a metal cable connecting the metal pipe to the potential of the earth, and a wire connecting the metal pipe to the ground. distribution grid.

L'invention concerne également un procédé pour améliorer le rendement d'un brûleur radiant conçu pour être alimenté en fonctionnement par un flux de mélange d'air et de gaz combustible, ce brûleur comprenant un corps délimitant une chambre de combustion et doté d'une entrée pour le mélange, un support de combustion poreux fermant la chambre de façon non étanche et disposé en aval de l'entrée dans le sens du flux du mélange, et une grille de répartition disposée entre l'entrée du mélange et le support de combustion, ce procédé comprenant une opération consistant à créer un champ électrique dans la chambre de combustion en appliquant une différence de potentiel électrique d'au moins 5 kV entre le support de combustion et la grille de répartition.  The invention also relates to a method for improving the efficiency of a radiant burner designed to be fed in operation by a mixture of air and fuel gas flow, this burner comprising a body delimiting a combustion chamber and provided with a inlet for the mixture, a porous combustion support sealing the chamber in an unsealed manner and disposed downstream of the inlet in the flow direction of the mixture, and a distribution grid disposed between the inlet of the mixture and the combustion support this method comprising an operation of creating an electric field in the combustion chamber by applying an electrical potential difference of at least 5 kV between the combustion support and the distribution grid.

D'autres caractéristiques et avantages de l'invention ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence au dessin annexé, dont l'unique figure est un schéma représentant, en coupe axiale, un brûleur conforme à un mode de réalisation possible de 1 ' invention . Other characteristics and advantages of the invention will emerge clearly from the description which is given hereinafter, by way of indication and in no way limiting, with reference to the appended drawing, the sole figure of which is a diagram showing, in axial section, a burner according to a possible embodiment of the invention.

Comme annoncé précédemment, l'invention concerne notamment un brûleur radiant conçu pour être alimenté en fonctionnement par un flux F de mélange d'air et de gaz combustible .  As previously announced, the invention relates in particular to a radiant burner designed to be fed in operation by a flow F of air mixture and fuel gas.

Un tel brûleur comprend typiquement un corps 1, un support de combustion poreux 2, et une grille métallique de répartition 3.  Such a burner typically comprises a body 1, a porous combustion support 2, and a distribution metal grid 3.

Le corps 1, qui délimite une chambre de combustion 10, est doté d'une entrée 11 pour le mélange.  The body 1, which delimits a combustion chamber 10, is provided with an inlet 11 for mixing.

Le support de combustion 2 ferme la chambre 10 de façon non étanche, et est disposé en aval de l'entrée 11 dans le sens du flux F du mélange.  The combustion support 2 closes the chamber 10 in an unsealed manner, and is disposed downstream of the inlet 11 in the direction of the flow F of the mixture.

La grille métallique de répartition 3 est quant à elle disposée entre l'entrée 10 du mélange et le support de combustion 2.  The metal distribution grid 3 is arranged between the inlet 10 of the mixture and the combustion support 2.

Selon l'invention, le corps 1 est réalisé dans un matériau diélectrique, par exemple en céramique, et le brûleur comprend en outre un générateur électrique 4, deux électrodes 51 et 52, et deux liaisons galvaniques 61 et 62.  According to the invention, the body 1 is made of a dielectric material, for example ceramic, and the burner further comprises an electric generator 4, two electrodes 51 and 52, and two galvanic connections 61 and 62.

Le générateur électrique 4, qui comporte deux bornes 41 et 42, est conçu pour délivrer entre ses bornes, en fonctionnement, une tension présentant une composante continue au moins égale à 5 kV.  The electric generator 4, which comprises two terminals 41 and 42, is designed to deliver between its terminals, in operation, a voltage having a DC component at least equal to 5 kV.

De préférence, ce générateur électrique délivre en fonctionnement une tension continue comprise entre 15 kV et 25 kV et typiquement de l'ordre de 20 kV.  Preferably, this electrical generator delivers in operation a DC voltage of between 15 kV and 25 kV and typically of the order of 20 kV.

La première électrode 51 est disposée sur la grille de répartition 3, et la deuxième électrode 52, par exemple réalisée en acier inoxydable, est disposée sur le support de combustion 2. The first electrode 51 is disposed on the distribution grid 3, and the second electrode 52, for example made of stainless steel, is arranged on the combustion support 2.

Enfin, les liaisons galvaniques 61 et 62 ont pour fonction de relier respectivement les électrodes 51 et 52 aux bornes 41 et 42 du générateur 4.  Finally, the function of the galvanic connections 61 and 62 is to connect the electrodes 51 and 52 respectively to the terminals 41 and 42 of the generator 4.

Dans le mode de réalisation illustré, la première électrode 51 est constituée d'une pointe métallique 51 disposée sur la grille de répartition 3 et orientée suivant un axe pointant vers le support de combustion 2.  In the illustrated embodiment, the first electrode 51 consists of a metal tip 51 disposed on the distribution grid 3 and oriented along an axis pointing towards the combustion support 2.

La deuxième électrode 52, qui a la forme d'une surface évidée telle qu'un anneau ou une fenêtre, est quant à elle disposée sur le support de combustion 2 et entoure l'axe de la pointe 51.  The second electrode 52, which has the shape of a recessed surface such as a ring or a window, is arranged on the combustion support 2 and surrounds the axis of the tip 51.

Les électrodes 51 et 52 peuvent cependant prendre d'autres formes.  The electrodes 51 and 52 may however take other forms.

Par exemple, la première électrode 51 peut prendre la forme d'une pluralité de pointes, et les formes des électrodes 51 et 52 peuvent être interverties.  For example, the first electrode 51 may take the form of a plurality of tips, and the shapes of the electrodes 51 and 52 may be interchanged.

Le support de combustion 2 peut être réalisé en métal ou en céramique, par exemple en cordiérite.  The combustion support 2 may be made of metal or ceramic, for example cordierite.

Comme le montre la figure, le brûleur comprend avantageusement aussi un déflecteur 7 disposé dans le corps 1, ainsi qu'une conduite métallique 8 pouvant former ou comprendre un venturi (non représenté) permettant de produire le mélange air / gaz combustible.  As shown in the figure, the burner advantageously also comprises a baffle 7 disposed in the body 1, and a metal pipe 8 may form or include a venturi (not shown) for producing the air / fuel gas mixture.

Ce mélange est canalisé jusque dans la chambre 10 par la conduite 8 qui débouche dans le corps 1 par l'entrée 11, cette entrée 11 étant couverte au moins partiellement et de façon non étanche par le déflecteur 7.  This mixture is channeled into the chamber 10 through the pipe 8 which opens into the body 1 through the inlet 11, this inlet 11 being covered at least partially and unsealed by the deflector 7.

De préférence, la première borne 41 du générateur électrique 4 est au potentiel de la terre, et la première liaison galvanique 61 comprend par exemple un câble métallique 611 reliant la conduite métallique 8 au potentiel de la terre, et un fil métallique 612 reliant la conduite métallique 8 à la grille de répartition 3. Preferably, the first terminal 41 of the electric generator 4 is at ground potential, and the first galvanic connection 61 comprises, for example, a cable metal 611 connecting the metal pipe 8 to the potential of the earth, and a wire 612 connecting the metal pipe 8 to the distribution grid 3.

La présence d'un champ électrique dans la chambre de combustion 10, obtenu en appliquant une différence de potentiel électrique d'au moins 5 kV entre le support de combustion 2 et la grille de répartition 3, permet d'augmenter le rendement du brûleur radiant.  The presence of an electric field in the combustion chamber 10, obtained by applying an electric potential difference of at least 5 kV between the combustion support 2 and the distribution grid 3, makes it possible to increase the efficiency of the radiant burner .

Des essais ont été effectués avec un brûleur radiant comprenant les éléments suivants : Tests have been carried out with a radiant burner comprising the following elements:

- un corps 1 en céramique de type Usinit 1100;  a ceramic body 1 of the Usinit 1100 type;

- un support de combustion 2 en céramique vierge de type cordiérite à structure en nid d'abeille à 62 cellules par centimètre carré, de dimensions 150 mm x 150 mm x 15 mm;  a virgin cordierite type ceramic honeycomb 2 combustion support of 62 cells per square centimeter, of dimensions 150 mm × 150 mm × 15 mm;

une grille métallique de répartition 3, de dimensions 140 mm x 140 mm; cette grille était perforée de trous de 3 mm de diamètre et disposée la chambre 10 à une distance de 50 mm par rapport à l'entrée 11;  a metal grid distribution 3, dimensions 140 mm x 140 mm; this grid was perforated with holes 3 mm in diameter and arranged the chamber 10 at a distance of 50 mm with respect to the inlet 11;

- un déflecteur métallique 7 de dimensions 30 mm x 40 mm disposé sur le fond de la chambre 10;  - A metal baffle 7 of dimensions 30 mm x 40 mm disposed on the bottom of the chamber 10;

- une conduite métallique 8 dotée d'un venturi (non illustré) ;  a metal pipe 8 provided with a venturi (not shown);

- un générateur électrique 4 délivrant une tension continue de 15 kV;  an electric generator 4 delivering a DC voltage of 15 kV;

- une électrode 51 constituée d'une pointe métallique disposée au centre de la grille de répartition 3;  an electrode 51 consisting of a metal point disposed in the center of the distribution grid 3;

une électrode métallique 52 en acier inoxydable, ayant la forme d'une surface évidée telle qu'un anneau ou une fenêtre, étant disposée sur le contour du support de combustion 2 et étant reliée à la borne 42 de haute tension du générateur par un câble 62; a metal electrode 52 of stainless steel, having the shape of a recessed surface such as a ring or a window, being disposed on the contour of the combustion support 2 and being connected to the terminal 42 high voltage generator by a cable 62;

un câble métallique 611 reliant la conduite métallique 8 au potentiel de la terre, auquel était également reliée la borne de masse 41 du générateur 4; et  a wire rope 611 connecting the metal pipe 8 to the potential of the earth, which was also connected to the ground terminal 41 of the generator 4; and

- un fil métallique 612 reliant la conduite métallique a metal wire 612 connecting the metal pipe

8 à la grille de répartition 3. 8 to the distribution grid 3.

Le gain de rendement constaté sur ces essais et résultant de l'application d'un champ électrique est de l'ordre de The gain in efficiency found on these tests and resulting from the application of an electric field is of the order of

Claims

REVENDICATIONS . CLAIMS. 1. Brûleur radiant conçu pour être alimenté en fonctionnement par un flux (F) de mélange d'air et de gaz combustible, ce brûleur comprenant un corps (1) délimitant une chambre de combustion (10) et doté d'une entrée (11) pour le mélange, un support de combustion poreux (2) fermant la chambre (10) de façon non étanche et disposé en aval de l'entrée (11) dans le sens du flux (F) du mélange, et une grille métallique de répartition (3) disposée entre l'entrée (10) du mélange et le support de combustion (2), caractérisé en ce que le corps (1) est réalisé dans un matériau diélectrique, en ce que le brûleur comprend en outre un générateur électrique (4), des première et deuxième électrodes (51, 52), et des première et deuxième liaisons galvaniques (61, 62), en ce que le générateur électrique (4) est conçu pour délivrer en fonctionnement, entre des première et deuxième bornes (41, 42), une tension présentant une composante continue au moins égale à 5 kV, en ce que la première électrode (51) est disposée sur la grille de répartition (3), en ce que la deuxième électrode (52) est disposée sur le support de combustion (2), et en ce que les première et deuxième liaisons galvaniques (61, 62) relient respectivement les première et deuxième électrodes (51, 52) aux première et deuxième bornes (41, 42) du générateur ( 4 ) . A radiant burner adapted to be fed in operation by a flow (F) for mixing air and combustible gas, said burner comprising a body (1) delimiting a combustion chamber (10) and having an inlet (11). ) for mixing, a porous combustion support (2) sealing the chamber (10) in an unsealed manner and disposed downstream of the inlet (11) in the flow direction (F) of the mixture, and a metal grid of distribution (3) arranged between the inlet (10) of the mixture and the combustion support (2), characterized in that the body (1) is made of a dielectric material, in that the burner further comprises an electric generator (4), first and second electrodes (51, 52), and first and second galvanic links (61, 62), in that the electrical generator (4) is adapted to deliver in operation between first and second terminals (41, 42), a voltage having a DC component at least equal to 5 kV, in that the first electrode (51) is arranged on the distribution grid (3), in that the second electrode (52) is arranged on the combustion support (2), and in that the first and second second galvanic links (61, 62) respectively connect the first and second electrodes (51, 52) to the first and second terminals (41, 42) of the generator (4). 2. Brûleur radiant suivant la revendication 1, caractérisé en ce que la première électrode (51) comprend au moins une pointe métallique (51) disposée sur la grille de répartition (3) et orientée suivant un axe pointant vers le support de combustion (2) . 2. Radiant burner according to claim 1, characterized in that the first electrode (51) comprises at least one metal point (51) disposed on the distribution grid (3) and oriented along an axis pointing towards the combustion support (2). 3. Brûleur radiant suivant la revendication 2, caractérisé en ce que la deuxième électrode (52) est disposée sur le support de combustion (2), a la forme d'une surface évidée, telle qu'un anneau ou une fenêtre, et entoure l'axe de la pointe (51) .  Radiant burner according to Claim 2, characterized in that the second electrode (52) is arranged on the combustion support (2) in the form of a recessed surface, such as a ring or a window, and surrounds the axis of the tip (51). 4. Brûleur radiant suivant l'une quelconque des revendications précédentes, caractérisé en ce que le support de combustion (2) est réalisé en céramique ou en métal .  4. Radiant burner according to any one of the preceding claims, characterized in that the combustion support (2) is made of ceramic or metal. 5. Brûleur radiant suivant l'une quelconque des revendications précédentes, caractérisé en ce que le corps (1) est réalisé en céramique.  5. radiant burner according to any one of the preceding claims, characterized in that the body (1) is made of ceramic. 6. Brûleur radiant suivant l'une quelconque des revendications précédentes, caractérisé en ce que le générateur électrique (4) est conçu pour délivrer en fonctionnement une tension continue comprise entre 15 kV et 25 kV.  6. radiant burner according to any one of the preceding claims, characterized in that the electric generator (4) is designed to deliver in operation a DC voltage between 15 kV and 25 kV. 7. Brûleur radiant suivant l'une quelconque des revendications précédentes, caractérisé en ce que la deuxième électrode (52) est réalisée en acier inoxydable.  7. radiant burner according to any one of the preceding claims, characterized in that the second electrode (52) is made of stainless steel. 8. Brûleur radiant suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend en outre un déflecteur (7) disposé dans le corps (1) et une conduite métallique (8), la conduite (8) canalisant le mélange et débouchant dans le corps par ladite entrée (11), et cette entrée (11) étant couverte au moins partiellement et de façon non étanche par le déflecteur (7) .  8. radiant burner according to any one of the preceding claims, characterized in that it further comprises a baffle (7) disposed in the body (1) and a metal pipe (8), the pipe (8) channeling the mixture and opening into the body through said inlet (11), and this inlet (11) being covered at least partially and unsealed by the deflector (7). 9. Brûleur radiant suivant la revendication 8, caractérisé en ce que la première borne (41) du générateur électrique (4) est au potentiel de la terre, et en ce que la première liaison galvanique (61) comprend un câble métallique (611) reliant la conduite métallique (8) au potentiel de la terre, et un fil métallique (612) reliant la conduite métallique (8) à la grille de répartition (3) . Radiant burner according to Claim 8, characterized in that the first terminal (41) of the electric generator (4) is at the earth potential, and in that the first galvanic connection (61) comprises a wire rope (611) connecting the metal pipe (8) to the earth potential, and a wire (612) connecting the metal pipe (8) to the distribution grid (3). 10. Procédé d'amélioration du rendement d'un brûleur radiant conçu pour être alimenté en fonctionnement par un flux (F) de mélange d'air et de gaz combustible, ce brûleur comprenant un corps (1) délimitant une chambre de combustion (10) et doté d'une entrée (11) pour le mélange, un support de combustion poreux (2) fermant la chambre (10) de façon non étanche et disposé en aval de l'entrée (11) dans le sens du flux (F) du mélange, et une grille de répartition (3) disposée entre l'entrée (10) du mélange et le support de combustion (2), ce procédé comprenant une opération consistant à créer un champ électrique dans la chambre de combustion (10) en appliquant une différence de potentiel électrique d'au moins 5 kV entre le support de combustion (2) et la grille de répartition (3) .  10. A method for improving the efficiency of a radiant burner designed to be fed in operation by a flow (F) for mixing air and fuel gas, said burner comprising a body (1) defining a combustion chamber (10). ) and having an inlet (11) for mixing, a porous combustion support (2) sealing the chamber (10) in an unsealed manner and disposed downstream of the inlet (11) in the flow direction (F) ) of the mixture, and a distribution grid (3) disposed between the inlet (10) of the mixture and the combustion support (2), which method comprises an operation of creating an electric field in the combustion chamber (10) by applying an electrical potential difference of at least 5 kV between the combustion support (2) and the distribution grid (3).
EP10785484.6A 2009-10-22 2010-10-20 Radiating burner having enhanced performance and method for improving the performance of a radiating burner Active EP2491307B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0957405A FR2951808B1 (en) 2009-10-22 2009-10-22 RADIANT BURNER WITH INCREASED YIELD, AND METHOD FOR IMPROVING THE YIELD OF A RADIANT BURNER
PCT/FR2010/052242 WO2011048337A2 (en) 2009-10-22 2010-10-20 Radiating burner having enhanced performance and method for improving the performance of a radiating burner

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EP2491307A2 true EP2491307A2 (en) 2012-08-29
EP2491307B1 EP2491307B1 (en) 2015-07-22

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EP (1) EP2491307B1 (en)
CN (1) CN102549338B (en)
CA (1) CA2772699C (en)
ES (1) ES2551003T3 (en)
FR (1) FR2951808B1 (en)
PT (1) PT2491307E (en)
WO (1) WO2011048337A2 (en)

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Also Published As

Publication number Publication date
WO2011048337A3 (en) 2012-02-16
CA2772699A1 (en) 2011-04-28
CA2772699C (en) 2018-02-20
ES2551003T3 (en) 2015-11-13
EP2491307B1 (en) 2015-07-22
FR2951808B1 (en) 2011-11-18
US20120231398A1 (en) 2012-09-13
CN102549338A (en) 2012-07-04
WO2011048337A2 (en) 2011-04-28
CN102549338B (en) 2014-08-20
FR2951808A1 (en) 2011-04-29
US9618199B2 (en) 2017-04-11
PT2491307E (en) 2015-11-12

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