EP1055084B1 - Method for heating products in an enclosure and burner for carrying out the method - Google Patents

Method for heating products in an enclosure and burner for carrying out the method Download PDF

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Publication number
EP1055084B1
EP1055084B1 EP99900951A EP99900951A EP1055084B1 EP 1055084 B1 EP1055084 B1 EP 1055084B1 EP 99900951 A EP99900951 A EP 99900951A EP 99900951 A EP99900951 A EP 99900951A EP 1055084 B1 EP1055084 B1 EP 1055084B1
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EP
European Patent Office
Prior art keywords
burner
region
chamber
oxidizer
outlet
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EP99900951A
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German (de)
French (fr)
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EP1055084A1 (en
Inventor
Celso Zerbinatti
Dominique 8 résidence des Pépinières ROBILLARD
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LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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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 
    • 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/006—Combustion apparatus characterised by the shape of the combustion chamber the chamber being arranged for cyclonic 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
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other

Definitions

  • the invention relates to a method of heating products in an enclosure itself heated by burner (s) and more particularly a process for heating products including glassmakers to work, and a burner for setting work of this process.
  • glass products must be taken in a broad sense including in particular the glassware and glassware products crystal.
  • the enclosures internally have a general shape approximately cylindrical of revolution and their wall is crossed outlet (x) or is housed an end portion of a burner.
  • the ports are distributed along the length of the enclosure along one or more generators of the cylinder, and they go right through the wall not radially but in a direction allowing a connection almost tangent from an inner side wall of the quill to the inner wall of the enclosure approximately cylindrical.
  • Burners with the end part housed in such openers are generally of a type known as “tube in tube”, that is to say that they have a structure coaxial bitubes of generally cylindrical shape (see eg US-A-5,199,866); these burners heat the enclosure locally, the distribution of the enclosure in the refractory lining of the wall being very inhomogeneous, the hottest region being the one that is in alignment with the longitudinal axis of the workman and immediately around.
  • the implementation of so-called "multi-hole” burners do not seem to have led so far reliably to better heating homogeneity of the inner wall of the enclosure.
  • the invention therefore aims to create a process and a burner thanks to which the internal wall of the enclosure is homogeneously heated and offering good safety of implementation.
  • the object of the invention is to design a burner providing a flame likely to adapt to the shape of the inner wall of the enclosure.
  • the method and the burner according to the invention can also be used for a lot of other applications, and one can in particular consider maintaining the glass temperature at the distributors, known in the technique under the name of "feeders”, glass ovens, as well as the areas of rolling, re-burning, and cutting of the glass, without the presence of "darts”.
  • the invention relates to a method of heating of products in an enclosure by means of at least a flame produced by a burner housed at least partially in a housing in a wall of the enclosure possibly through an added workman, process in which an entry region is introduced from the burner separate streams of combustible gas under pressure and oxidizing gas under pressure, it is transmitted in the burner separately these two gas streams at separate chambers by means of which the respective pressures of the two gas streams, we evacuate towards a burner outlet region the gases from the chambers balancing into two separate currents, and we project the two pressurized gas streams out of the burner in pairs respective separate and adjacent outlet slots provided in the exit region, in the form of two streams adjacent laminaria, in a flame, to mix the two gas only partially in the flame so that this presents a flame profile having a region where the oxidizer is in excess and which in turn determines a oxidative enclosure region and at least one region where the oxidizer is in default and which in turn determines a reducing enclosure region.
  • the invention also relates to a burner for production of a flame in a heating chamber of produced from two gas streams from a region burner outlet, comprising two separate inlet channels for combustible gas respectively under pressure and for an oxidizing gas under pressure, at least two separate balancing chambers respectively for the fuel and oxidizer and one connected to the channel inlet for fuel and the other to the inlet channel for the oxidizer, and two separate outlet channels respectively for fuel and for oxidizer and connected one to the room for the fuel and the other to the room for the oxidizer, opening out of the burner into the outlet region of it by two adjacent slots, at least the two outlet channels being separated by a partition having opposite walls delimiting respectively the outlet channel for fuel and outlet channel for fuel the oxidizer with a respective burner wall opposite the partition.
  • the position of the burners can be turned upside down so that the relative position of the flame region where the oxidizer is in excess and the flame region where the oxidizer is in default is reversed.
  • balancing chambers are made up of cascading compartments connected by conduits facilitate pressure balancing and avoid formation of a so-called "pointed" flame.
  • the burner shown in Figure 1 in section longitudinal by a plane which is generally vertical when the burner equips a cylindrical enclosure whose axis central extends horizontally as shown schematically in Figure 4, externally approximately the shape of a parallelepiped, two of which parallel edges are replaced by bevels.
  • This burner is intended to be traversed by a stream of pressurized combustible gas and a stream of oxidizing gas under pressure brought into its inlet region by separate supply lines, and out of suitably by separate orifices arranged in its exit region, according to the invention, without having been previously mixed.
  • the burner has two channels input 1, 2 separate for fuel and for the oxidizer, opening into one of the burner faces (entrance face), to which two rooms are connected respective 3, 4 pressure balancing also separate, or two separate groups of balancing chambers.
  • the inlet channels open into their respective balancing chamber, they have a section narrowed to determine an abutment shoulder for the end of their supply line.
  • Two separate output channels 5, 6 respectively for the fuel and for the oxidizer are connected the first to chamber 3 for fuel and the second to room 4 for the oxidizer. These channels lead out of the burner, in the outlet region thereof, in pairs orifices in the form of two adjacent slots 7, 8 made in the opposite side of the burner and parallel to the entry face (exit face).
  • the burner is preferably made up of several pieces assembled and then includes two half-burners arranged one for the passage of fuel and the other for the passage of the oxidizer.
  • an intermediate piece 9 is inserted between the two half-burners to serve as a partition between them, which allows at least the channels of outlet 5, 6 in the form of recesses in the faces in look of the two burners, and as in the figures, also compartments 3A, 3B, 4A, 4B of chambers 3, 4 pressure balancing.
  • the two half-burners being placed opposite with their corresponding recesses opposite, the channels of exit 5, 6 and possibly the compartments of the rooms 3, 4 are delimited on one side by a wall of the partition 9 and on the opposite side by a wall of the half-burner, which extend to the exit face, in the exit region of the burner.
  • the balancing chambers 3, 4 have several compartments, here two compartments 3A, 3B, 4A, 4B, are succeeding upstream downstream of the housing and connected by conduits 3C, 3D.
  • the walls of the partition 9 are approximately planar and parallel, and the same is true the wall of each chamber 3, 4 and each channel of outlet 5, 6 which is opposite the partition.
  • this facing wall may be inclined, and especially that of the outlet channel can converge in the partition 9 in the direction of the outlet face; in these conditions, the general directions of the two output channels are very slightly convergent.
  • the height of the slots 7, 8 is of the order of a tenth from millimeter to a few millimeters and in general in the range from 0.2 to 5.0 mm; it is preferably in the range from 0.4 to 3.0 mm, for example 0.4 to 1.5 mm for a fuel consisting of natural gas and 1 mm to 3.0 mm for a oxidizer consisting of oxygen.
  • the slits extend a few centimeters, and generally over most of the length of the exit face, for example 160 mm for a long face of 170 mm.
  • Obtaining a suitable flame is also related to the ratio between the length of each output channel and the height of the corresponding slot.
  • a "length of report channel / slot height" "equal to at least approximately 20 seems necessary to properly evacuate each of the two gas streams in the flame.
  • Compartments 3A, 3B, 4A, 4B of the two chambers of each half-burner are here of general shape parallelepipedic and of approximately equal dimensions, namely fifteen millimeters upstream downstream and one ten millimeters high; compartments extend approximately the same distance as the canals of exit 5, 6.
  • the conduits 3C, 4C connecting the compartments have a length of a few millimeters, for example 2 to 3 mm, and a section of a few square millimeters, for example 3 to 10 mm 2 ; they are distributed approximately regularly over the width of the compartments, and here there are 8 conduits 3C, 4C at a pitch of about twenty millimeters.
  • these dimensions correspond to an example application and can be modified in such a way so that the pressure balancing chambers 3, 4 fulfill their role of avoiding the passage preferential fluids below the inlet, and at provide a uniform "knife" flame whose profile is straight.
  • conduits 3C, 4C are away from the corresponding output channel 5, 6, and particular of the partition 9; preferably they extend in a region between two compartments so as to make communicate these near their wall belonging to the half-burner; advantageously, they are constituted by cylindrical drilling approximately tangent to this wall.
  • the bevels 10 connect the outlet face of the burner respectively to the faces parallel to the partition.
  • the angle ⁇ of each beveled face 10 relative to the face parallel to the partition to which it ends is approximately 30 °.
  • the presence of the bevels 10 makes it possible to insert the burner at least partially in a housing provided in a wall of the enclosure or in an added opener housed in the enclosure, itself presenting interior faces 11 inclined going converging towards the interior of the enclosure by determining between the bevels 10 of the burner and the interior surfaces 11 of the housing of the enclosure or the outlet, at least one channel and preferably two channels 12 respective where we introduce by induction one or two outside air flow (s) towards the interior of the enclosure. If the dimensions and angles are suitably chosen, the air flow induced by effect Venturi between burner bevel and housing, both streams of pressurized gas projected out of the burner allows noticeable cooling of it in its region of exit.
  • each bevel 10 of the outer surface of the burner and the face interior 11 of the housing opposite is about ten degrees, and the burner outlet face is set back at the interior of the accommodation, from a distance of approximately the range from a few tenths of a millimeter to ten millimeters.
  • the burner can be housed directly in the refractory wall of the enclosure or in an attached piece serving as a workman; this second solution allows the control of the wear of this part, which is consumable.
  • this burner structure allows, thanks to the shape of the slots 7, 8, to obtain a flat flame; moreover, an appropriate dimensioning such as those which have been given by way of example allows this flame to be obtained either soft and asymmetrical.
  • the flame 14 follows the shape inner circular of the enclosure by defining therein on one side an oxidizing zone 15 and on the other a zone reducing 16.
  • the oxidizer is introduced from the side from the center of the enclosure 13, and the fuel from the side of the wall, we obtain in the enclosure an oxidizing central region allowing optimal treatment of glass or crystal articles.
  • the fuel is trapped between the oxygen slide and the wall, which allows its complete combustion. This reduces oxide emissions of carbon to the room where the enclosure is located.
  • the flame asymmetry reduces production nitrogen oxides.
  • the externally symmetrical structure of the burner allows you to turn it face to face in its housing therefore to reverse the oxidizing region and the region reducing in the enclosure, which offers great flexibility of use since it allows to create at will above glass a reducing or oxidizing atmosphere.
  • the invention can be implemented for maintaining the temperature of the so-called dispensers "feeders" for glass ovens, which are currently heated generally by air-fuel burners which have a high consumption (they work with cold air), which generate a great volatilization of the glass and in particular borosilicates, which have a corrosive action, which have a operation can be dangerous because it is premix burners, which emit large amounts of harmful gases in the room.

Description

L'invention concerne un procédé de chauffage de produits dans une enceinte elle-même chauffée par brûleur(s) et plus particulièrement un procédé de chauffage de produits notamment verriers à travailler, et un brûleur pour la mise en oeuvre de ce procédé.The invention relates to a method of heating products in an enclosure itself heated by burner (s) and more particularly a process for heating products including glassmakers to work, and a burner for setting work of this process.

Dans ce contexte, l'expression "produits verriers" doit être prise dans un sens large englobant notamment les produits du domaine de la verrerie et ceux du domaine de la cristallerie.In this context, the expression "glass products" must be taken in a broad sense including in particular the glassware and glassware products crystal.

Pour un certain nombre d'applications, notamment le réchauffage de verrerie ou de cristallerie, les enceintes présentent intérieurement une forme générale approximativement cylindrique de révolution et leur paroi est traversée d'ouvreau(x) ou est logée une partie d'extrémité d'un brûleur. Dans le cas général où l'enceinte doit être chauffée par plusieurs brûleurs, les ouvreaux sont répartis sur la longueur de l'enceinte le long d'une ou de plusieurs génératrices du cylindre, et ils traversent la paroi de part en part non pas radialement mais dans une direction permettant un raccordement presque tangent d'une paroi latérale interne de l'ouvreau à la paroi interne de l'enceinte approximativement cylindrique.For a number of applications, including the reheating of glassware or crystal glassware, the enclosures internally have a general shape approximately cylindrical of revolution and their wall is crossed outlet (x) or is housed an end portion of a burner. In the general case where the enclosure must be heated by several burners, the ports are distributed along the length of the enclosure along one or more generators of the cylinder, and they go right through the wall not radially but in a direction allowing a connection almost tangent from an inner side wall of the quill to the inner wall of the enclosure approximately cylindrical.

Les brûleurs dont la partie d'extrémité est logée dans de tels ouvreaux sont généralement d'un type dit "tube dans tube", c'est-à-dire qu'ils présentent une structure bitubes coaxiale de forme générale cylindrique (voir p. ex. US-A-5 199 866); ces brûleurs chauffent l'enceinte de manière localisée, la répartition de l'enceinte dans le revêtement d'interne réfractaire de la paroi étant très inhomogène, la région la plus chaude étant celle qui est dans l'alignement de l'axe longitudinal de l'ouvreau et immédiatement autour. La mise en oeuvre de brûleurs dits "multi-trous" ne semble pas avoir mené jusqu'ici de manière fiable à une meilleure homogénéité de chauffage de la paroi intérieure de l'enceinte.Burners with the end part housed in such openers are generally of a type known as "tube in tube ", that is to say that they have a structure coaxial bitubes of generally cylindrical shape (see eg US-A-5,199,866); these burners heat the enclosure locally, the distribution of the enclosure in the refractory lining of the wall being very inhomogeneous, the hottest region being the one that is in alignment with the longitudinal axis of the workman and immediately around. The implementation of so-called "multi-hole" burners do not seem to have led so far reliably to better heating homogeneity of the inner wall of the enclosure.

L'invention a donc pour but de créer un procédé et un brûleur grâce auxquels la paroi interne de l'enceinte est chauffée de manière homogène et présentant une bonne sécurité de mise en oeuvre.The invention therefore aims to create a process and a burner thanks to which the internal wall of the enclosure is homogeneously heated and offering good safety of implementation.

Pour atteindre ce but, l'objet de l'invention consiste à concevoir un brûleur fournissant une flamme susceptible de s'adapter à la forme de la paroi interne de l'enceinte.To achieve this object, the object of the invention is to design a burner providing a flame likely to adapt to the shape of the inner wall of the enclosure.

Le procédé et le brûleur selon l'invention peuvent également être utilisés pour un grand nombre d'autres applications, et on peut notamment envisager le maintien du verre en température au niveau des distributeurs, connus dans la technique sous le nom de "feeders", des fours à verre, ainsi que les domaines du laminage, du rebrûlage, et du découpage du verre, sans présence de "dards".The method and the burner according to the invention can also be used for a lot of other applications, and one can in particular consider maintaining the glass temperature at the distributors, known in the technique under the name of "feeders", glass ovens, as well as the areas of rolling, re-burning, and cutting of the glass, without the presence of "darts".

A cette fin, l'invention concerne un procédé de chauffage de produits dans une enceinte au moyen d'au moins une flamme produite par un brûleur logé au moins partiellement dans un logement ménagé dans une paroi de l'enceinte éventuellement par l'intermédiaire d'un ouvreau rapporté, procédé dans lequel on introduit dans une région d'entrée du brûleur des courants séparés de gaz combustible sous pression et de gaz comburant sous pression, on transmet dans le brûleur de manière séparée ces deux courants de gaz à des chambres séparées au moyen desquelles on équilibre les pressions respectives des deux courants de gaz, on évacue vers une région de sortie du brûleur les gaz des chambres d'équilibrage en deux courants séparés, et on projette les deux courants de gaz sous pression hors du brûleur par deux fentes de sortie respectives séparées et adjacentes ménagées dans la région de sortie, sous la forme de deux courants laminaires adjacents, dans une flamme, pour mélanger les deux gaz de manière seulement partielle dans la flamme afin que celle-ci présente un profil de flamme ayant une région où le comburant est en excès et qui détermine ainsi de son côté une région d'enceinte oxydante et au moins une région où le comburant est en défaut et qui détermine ainsi de son côté une région d'enceinte réductrice.To this end, the invention relates to a method of heating of products in an enclosure by means of at least a flame produced by a burner housed at least partially in a housing in a wall of the enclosure possibly through an added workman, process in which an entry region is introduced from the burner separate streams of combustible gas under pressure and oxidizing gas under pressure, it is transmitted in the burner separately these two gas streams at separate chambers by means of which the respective pressures of the two gas streams, we evacuate towards a burner outlet region the gases from the chambers balancing into two separate currents, and we project the two pressurized gas streams out of the burner in pairs respective separate and adjacent outlet slots provided in the exit region, in the form of two streams adjacent laminaria, in a flame, to mix the two gas only partially in the flame so that this presents a flame profile having a region where the oxidizer is in excess and which in turn determines a oxidative enclosure region and at least one region where the oxidizer is in default and which in turn determines a reducing enclosure region.

Grâce au fait qu'à l'intérieur du brûleur, les deux courants de gaz sont séparés, les risques de retour de flamme dans le brûleur et ainsi d'explosion sont notablement réduits. Thanks to the fact that inside the burner, the two gas currents are separated, the risks of flashback in the burner and so explosion are significantly reduced.

Le procédé selon l'invention peut de plus présenter une ou plusieurs des caractéristiques suivantes :

  • on projette les deux courants de gaz sous pression hors du brûleur dans une enceinte intérieurement de forme générale approximativement cylindrique, transversalement et approximativement tangentiellement pour que la flamme épouse la forme circulaire intérieure de l'enceinte en définissant dans celle-ci d'un côté une région oxydante et de l'autre une région réductrice ;
  • on introduit également dans l'enceinte, par au moins un canal déterminé entre une face extérieure du brûleur et une face intérieure du logement de l'enceinte ou de l'ouvreau, un courant d'air induit par les deux courants de gaz sous pression projetés hors du brûleur ;
  • on introduit également dans l'enceinte, par deux canaux déterminés chacun entre une face extérieure du brûleur et une face intérieure du logement de l'enceinte ou de l'ouvreau, deux courants d'air induits de part et d'autre des deux courants de gaz respectivement combustible et comburant adjacents.
The method according to the invention can also have one or more of the following characteristics:
  • the two streams of pressurized gas are projected out of the burner into an enclosure of generally roughly cylindrical general shape, transversely and approximately tangentially so that the flame conforms to the interior circular shape of the enclosure by defining therein on one side a oxidizing region and on the other a reducing region;
  • also introduced into the enclosure, by at least one determined channel between an outer face of the burner and an inner face of the housing of the enclosure or of the outlet, a current of air induced by the two streams of gas under pressure thrown out of the burner;
  • two air currents induced on either side of the two currents are also introduced into the enclosure, by two determined channels each between an outer face of the burner and an inner face of the enclosure of the enclosure or of the outlet respectively adjacent combustible and oxidizing gas.

L'invention concerne également un brûleur pour la production d'une flamme dans une enceinte de chauffage de produits à partir de deux courants de gaz issus d'une région de sortie du brûleur, comportant deux canaux d'entrée séparés respectivement pour un gaz combustible sous pression et pour un gaz comburant sous pression, au moins deux chambres d'équilibrage séparées respectivement pour le combustible et pour le comburant et reliées l'une au canal d'entrée pour le combustible et l'autre au canal d'entrée pour le comburant, et deux canaux de sortie séparés respectivement pour le combustible et pour le comburant et reliés l'un à la chambre pour le combustible et l'autre à la chambre pour le comburant, débouchant hors du brûleur dans la région de sortie de celui-ci par deux fentes adjacentes, au moins les deux canaux de sortie étant séparés par une cloison présentant des parois opposées délimitant respectivement le canal de sortie pour le combustible et le canal de sortie pour le comburant avec une paroi du brûleur respective opposée à la cloison. The invention also relates to a burner for production of a flame in a heating chamber of produced from two gas streams from a region burner outlet, comprising two separate inlet channels for combustible gas respectively under pressure and for an oxidizing gas under pressure, at least two separate balancing chambers respectively for the fuel and oxidizer and one connected to the channel inlet for fuel and the other to the inlet channel for the oxidizer, and two separate outlet channels respectively for fuel and for oxidizer and connected one to the room for the fuel and the other to the room for the oxidizer, opening out of the burner into the outlet region of it by two adjacent slots, at least the two outlet channels being separated by a partition having opposite walls delimiting respectively the outlet channel for fuel and outlet channel for fuel the oxidizer with a respective burner wall opposite the partition.

Grâce à cette structure, la position des brûleurs peut être retournée sens dessus-dessous de telle sorte que la position relative de la région de la flamme où le comburant est en excès et de la région de la flamme où le comburant est en défaut soit inversée.Thanks to this structure, the position of the burners can be turned upside down so that the relative position of the flame region where the oxidizer is in excess and the flame region where the oxidizer is in default is reversed.

Le brûleur selon l'invention peut de plus présenter une ou plusieurs des caractéristiques suivantes :

  • chaque chambre d'équilibrage comporte au moins deux compartiments se succédant d'amont en aval du brûleur et reliés par des conduits ;
  • les conduits s'étendent dans une région entre deux compartiments en faisant communiquer ceux-ci à proximité d'une paroi du brûleur opposée à une cloison entre les chambres respectivement pour le combustible et pour le comburant ;
  • les parois de la cloison sont approximativement planes et parallèles ;
  • la paroi de chaque canal de sortie qui est opposée à une paroi de la cloison est approximativement plane et parallèle à cette paroi de la cloison ;
  • la paroi de chaque canal de sortie qui est opposée à une paroi de la cloison s'étend en direction de la région de sortie en convergeant très légèrement avec cette paroi de la cloison ;
  • les canaux de sortie s'étendent vers la région de sortie dans des directions très légèrement convergentes ;
  • les fentes présentent une hauteur de l'ordre du dixième de millimètre à quelques millimètres ;
  • les fentes présentent une longueur de plusieurs centimètres ;
  • les chambres comportent des compartiments approximativement parallélépipédiques ;
  • il a extérieurement approximativement la forme d'un parallélépipède présentant au moins deux biseaux et comportant une face dans laquelle débouchent les deux canaux d'entrée et une face qui lui est approximativement parallèle dans laquelle s'étendent les deux fentes adjacentes les deux biseaux raccordant la face présentant les fentes respectivement à deux faces parallèles à la cloison ;
  • le rapport longueur du canal de sortie/hauteur de la fente correspondante est au moins approximativement égal à 20.
The burner according to the invention can also have one or more of the following characteristics:
  • each balancing chamber has at least two successive compartments from upstream to downstream of the burner and connected by conduits;
  • the conduits extend in a region between two compartments by communicating the latter near a wall of the burner opposite to a partition between the chambers respectively for the fuel and for the oxidant;
  • the walls of the partition are approximately flat and parallel;
  • the wall of each outlet channel which is opposite a wall of the partition is approximately flat and parallel to this wall of the partition;
  • the wall of each outlet channel which is opposite a wall of the partition extends in the direction of the outlet region, converging very slightly with this wall of the partition;
  • the outlet channels extend towards the outlet region in very slightly convergent directions;
  • the slots have a height of the order of a tenth of a millimeter to a few millimeters;
  • the slots have a length of several centimeters;
  • the rooms include approximately parallelepipedic compartments;
  • externally it has approximately the shape of a parallelepiped having at least two bevels and comprising a face into which the two inlet channels open and a face which is approximately parallel to it in which the two adjacent slots extend the two bevels connecting the face having the slots respectively with two faces parallel to the partition;
  • the ratio of the length of the outlet channel / height of the corresponding slot is at least approximately equal to 20.

Le fait que les chambres d'équilibrage soient constituées de compartiments en cascades reliés par des conduits facilite l'équilibrage des pressions et évite la formation d'une flamme dite "pointue".The fact that the balancing chambers are made up of cascading compartments connected by conduits facilitate pressure balancing and avoid formation of a so-called "pointed" flame.

D'autres caractéristiques et avantages de l'invention ressortiront de la description qui va suivre d'une forme de réalisation de l'invention donnée à titre d'exemple non limitatif et illustrée par les dessins joints dans lesquels :

  • la figure 1 est une section longitudinale schématique d'un brûleur selon l'invention, montrant le positionnement de celui-ci dans la paroi de l'enceinte de chauffage,
  • la figure 2 est une vue schématique de face du brûleur de la figure 1,
  • la figure 3 est une vue schématique de dessus du brûleur de la figure 1, et
  • la figure 4 est une section transversale schématique d'une enceinte de chauffage montrant le fonctionnement selon le procédé selon l'invention, du brûleur des figures 1 à 3.
Other characteristics and advantages of the invention will emerge from the description which follows of an embodiment of the invention given by way of nonlimiting example and illustrated by the accompanying drawings in which:
  • FIG. 1 is a schematic longitudinal section of a burner according to the invention, showing the positioning of the latter in the wall of the heating enclosure,
  • FIG. 2 is a schematic front view of the burner of FIG. 1,
  • FIG. 3 is a schematic top view of the burner of FIG. 1, and
  • FIG. 4 is a schematic cross section of a heating enclosure showing the operation according to the method according to the invention, of the burner of FIGS. 1 to 3.

Le brûleur représenté sur la figure 1 en section longitudinale par un plan qui est généralement vertical lorsque le brûleur équipe une enceinte cylindrique dont l'axe central s'étend horizontalement comme représenté schématiquement sur la figure 4, a extérieurement approximativement la forme d'un parallélépipède dont deux arêtes parallèles sont remplacées par des biseaux.The burner shown in Figure 1 in section longitudinal by a plane which is generally vertical when the burner equips a cylindrical enclosure whose axis central extends horizontally as shown schematically in Figure 4, externally approximately the shape of a parallelepiped, two of which parallel edges are replaced by bevels.

Ce brûleur est destiné à être parcouru par un courant de gaz combustible sous pression et par un courant de gaz comburant sous pression amenés dans sa région d'entrée par des conduites d'alimentation séparées, et à les évacuer de manière appropriée par des orifices séparés agencés dans sa région de sortie, selon l'invention, sans avoir été préalablement mélangés.This burner is intended to be traversed by a stream of pressurized combustible gas and a stream of oxidizing gas under pressure brought into its inlet region by separate supply lines, and out of suitably by separate orifices arranged in its exit region, according to the invention, without having been previously mixed.

A cette fin, le brûleur comporte deux canaux d'entrée 1, 2 séparés, respectivement pour le combustible et pour le comburant, débouchant dans l'une des faces du brûleur (face d'entrée), auxquels sont reliées deux chambres respectives 3, 4 d'équilibrage des pressions également séparées, ou deux groupes séparés de chambres d'équilibrage. Dans la région où les canaux d'entrée débouchent dans leur chambre d'équilibrage respective, ils présentent une section rétrécie afin de déterminer un épaulement de butée pour l'extrémité de leur conduite d'alimentation.To this end, the burner has two channels input 1, 2 separate for fuel and for the oxidizer, opening into one of the burner faces (entrance face), to which two rooms are connected respective 3, 4 pressure balancing also separate, or two separate groups of balancing chambers. In the region where the inlet channels open into their respective balancing chamber, they have a section narrowed to determine an abutment shoulder for the end of their supply line.

Deux canaux de sortie 5, 6 séparés respectivement pour le combustible et pour le comburant sont reliés le premier à la chambre 3 pour le combustible et le second pour la chambre 4 pour le comburant. Ces canaux débouchent hors du brûleur, dans la région de sortie de celui-ci, par deux orifices sous la forme de deux fentes 7, 8 adjacentes réalisées dans la face du brûleur opposée et parallèle à la face d'entrée (face de sortie).Two separate output channels 5, 6 respectively for the fuel and for the oxidizer are connected the first to chamber 3 for fuel and the second to room 4 for the oxidizer. These channels lead out of the burner, in the outlet region thereof, in pairs orifices in the form of two adjacent slots 7, 8 made in the opposite side of the burner and parallel to the entry face (exit face).

Sur le plan pratique, le brûleur est de préférence constitué en plusieurs pièces assemblées et comporte alors deux demi-brûleurs agencés l'un pour le passage du combustible et l'autre pour le passage du comburant.On a practical level, the burner is preferably made up of several pieces assembled and then includes two half-burners arranged one for the passage of fuel and the other for the passage of the oxidizer.

Avantageusement, une pièce intercalaire 9 est insérée entre les deux demi-brûleurs pour servir de cloison entre eux, ce qui permet de réaliser au moins les canaux de sortie 5, 6 sous la forme d'évidements dans les faces en regard des deux brûleurs, et comme sur les figures, également des compartiments 3A, 3B, 4A, 4B des chambres 3, 4 d'équilibrage de pression.Advantageously, an intermediate piece 9 is inserted between the two half-burners to serve as a partition between them, which allows at least the channels of outlet 5, 6 in the form of recesses in the faces in look of the two burners, and as in the figures, also compartments 3A, 3B, 4A, 4B of chambers 3, 4 pressure balancing.

Les deux demi-brûleurs étant mis en vis-à-vis avec leurs évidements correspondants en regard, les canaux de sortie 5, 6 et éventuellement les compartiments des chambres 3, 4 sont délimités d'un côté par une paroi de la cloison 9 et du côté opposé par une paroi du demi-brûleur, qui s'étendent jusqu'à la face de sortie, dans la région de sortie du brûleur.The two half-burners being placed opposite with their corresponding recesses opposite, the channels of exit 5, 6 and possibly the compartments of the rooms 3, 4 are delimited on one side by a wall of the partition 9 and on the opposite side by a wall of the half-burner, which extend to the exit face, in the exit region of the burner.

Les chambres d'équilibrage 3, 4 comportent plusieurs compartiments, ici deux compartiments 3A, 3B, 4A, 4B, se succédant d'amont en aval du boítier et reliés par des conduits 3C, 3D. The balancing chambers 3, 4 have several compartments, here two compartments 3A, 3B, 4A, 4B, are succeeding upstream downstream of the housing and connected by conduits 3C, 3D.

De préférence, les parois de la cloison 9 sont approximativement planes et parallèles, et il en est de même de la paroi de chaque chambre 3, 4 et de chaque canal de sortie 5, 6 qui est en vis-à-vis de la cloison. Cependant, en variante, cette paroi en vis-à-vis peut être inclinée, et notamment celle du canal de sortie peut converger dans la cloison 9 en direction de la face de sortie ; dans ces conditions, les directions générales des deux canaux de sortie sont très légèrement convergentes.Preferably, the walls of the partition 9 are approximately planar and parallel, and the same is true the wall of each chamber 3, 4 and each channel of outlet 5, 6 which is opposite the partition. However, in variant, this facing wall may be inclined, and especially that of the outlet channel can converge in the partition 9 in the direction of the outlet face; in these conditions, the general directions of the two output channels are very slightly convergent.

La hauteur des fentes 7, 8 est de l'ordre du dixième de millimètre à quelques millimètres et en général dans la gamme de 0,2 à 5,0 mm ; elle est de préférence dans la gamme de 0,4 à 3,0 mm, par exemple 0,4 à 1,5 mm pour un combustible constitué par du gaz naturel et 1 mm à 3,0 mm pour un comburant constitué par de l'oxygène.The height of the slots 7, 8 is of the order of a tenth from millimeter to a few millimeters and in general in the range from 0.2 to 5.0 mm; it is preferably in the range from 0.4 to 3.0 mm, for example 0.4 to 1.5 mm for a fuel consisting of natural gas and 1 mm to 3.0 mm for a oxidizer consisting of oxygen.

Les fentes s'étendent sur quelques centimètres, et généralement sur la plus grande partie de la longueur de la face de sortie, par exemple 160 mm pour une face longue de 170 mm.The slits extend a few centimeters, and generally over most of the length of the exit face, for example 160 mm for a long face of 170 mm.

La hauteur des fentes est choisie en fonction :

  • du combustible, le rapport des hauteurs étant dans le rapport de la stoechiométrie,
  • de la puissance mise en jeu,
  • de la vitesse d'éjection des gaz qui est choisie selon l'aspect de flamme désiré, la flamme étant d'autant plus courte que la vitesse d'éjection est élevée.
The height of the slots is chosen according to:
  • of the fuel, the ratio of the heights being in the ratio of the stoichiometry,
  • of the power involved,
  • the gas ejection speed which is chosen according to the desired flame aspect, the flame being shorter the higher the ejection speed.

L'obtention d'une flamme convenable est également liée au rapport entre la longueur de chaque canal de sortie et la hauteur de la fente correspondante. Un rapport "longueur de canal/hauteur de fente" égal approximativement à 20 au moins semble nécessaire pour évacuer de manière correcte chacun des deux courants de gaz dans la flamme.Obtaining a suitable flame is also related to the ratio between the length of each output channel and the height of the corresponding slot. A "length of report channel / slot height "equal to at least approximately 20 seems necessary to properly evacuate each of the two gas streams in the flame.

Les compartiments 3A, 3B, 4A, 4B des deux chambres de chaque demi-brûleur sont ici de forme générale parallélépipèdique et de dimensions approximativement égales, à savoir une quinzaine de millimètres d'amont en aval et une dizaine de millimètres de haut ; les compartiments s'étendent approximativement sur la même distance que les canaux de sortie 5, 6. Compartments 3A, 3B, 4A, 4B of the two chambers of each half-burner are here of general shape parallelepipedic and of approximately equal dimensions, namely fifteen millimeters upstream downstream and one ten millimeters high; compartments extend approximately the same distance as the canals of exit 5, 6.

Les conduits 3C, 4C reliant les compartiments ont une longueur de quelques millimètres, par exemple 2 à 3 mm, et une section de quelques millimètres carrés, par exemple 3 à 10 mm2 ; ils sont répartis approximativement régulièrement sur la largeur des compartiments, et ici on a 8 conduits 3C, 4C à un pas d'une vingtaine de millimètres.The conduits 3C, 4C connecting the compartments have a length of a few millimeters, for example 2 to 3 mm, and a section of a few square millimeters, for example 3 to 10 mm 2 ; they are distributed approximately regularly over the width of the compartments, and here there are 8 conduits 3C, 4C at a pitch of about twenty millimeters.

Cependant, ces dimensions correspondent à un exemple d'application particulier et peuvent être modifiées de telle sorte que les chambres 3, 4 d'équilibrage des pressions remplissent leur rôle consistant à éviter le passage préférentiel des fluides à l'aplomb de l'entrée, et à permettre d'obtenir en sortie une flamme "couteau" homogène dont le profil est droit.However, these dimensions correspond to an example application and can be modified in such a way so that the pressure balancing chambers 3, 4 fulfill their role of avoiding the passage preferential fluids below the inlet, and at provide a uniform "knife" flame whose profile is straight.

Pour les mêmes raisons, les conduits 3C, 4C sont éloignés du canal de sortie 5, 6 correspondant, et en particulier de la cloison 9 ; de préférence, ils s'étendent dans un région entre deux compartiments de manière à faire communiquer ceux-ci à proximité de leur paroi appartenant au demi-brûleur ; avantageusement, ils sont constitués par des forages cylindriques approximativement tangents à cette paroi.For the same reasons, conduits 3C, 4C are away from the corresponding output channel 5, 6, and particular of the partition 9; preferably they extend in a region between two compartments so as to make communicate these near their wall belonging to the half-burner; advantageously, they are constituted by cylindrical drilling approximately tangent to this wall.

Les biseaux 10 relient la face de sortie du brûleur respectivement aux faces parallèles à la cloison. L'angle  de chaque face en biseau 10 par rapport à la face parallèle à la cloison à laquelle elle aboutit est d'environ 30°.The bevels 10 connect the outlet face of the burner respectively to the faces parallel to the partition. The angle  of each beveled face 10 relative to the face parallel to the partition to which it ends is approximately 30 °.

La présence des biseaux 10 permet d'insérer le brûleur au moins partiellement dans un logement ménagé dans une paroi de l'enceinte ou dans un ouvreau rapporté logé dans l'enceinte, présentant lui-même des faces intérieures 11 inclinées allant en convergeant en direction de l'intérieur de l'enceinte en déterminant entre les biseaux 10 du brûleur et les surfaces intérieures 11 du logement de l'enceinte ou de l'ouvreau, au moins un canal et de préférence deux canaux 12 respectifs par où on introduit par induction un ou deux courant(s) d'air extérieur en direction de l'intérieur de l'enceinte. Si les dimensions et les angles sont convenablement choisis, le courant d'air induit par effet Venturi entre biseau du brûleur et logement, par les deux courants de gaz sous pression projetés hors du brûleur permet un refroidissement notable de celui-ci dans sa région de sortie.The presence of the bevels 10 makes it possible to insert the burner at least partially in a housing provided in a wall of the enclosure or in an added opener housed in the enclosure, itself presenting interior faces 11 inclined going converging towards the interior of the enclosure by determining between the bevels 10 of the burner and the interior surfaces 11 of the housing of the enclosure or the outlet, at least one channel and preferably two channels 12 respective where we introduce by induction one or two outside air flow (s) towards the interior of the enclosure. If the dimensions and angles are suitably chosen, the air flow induced by effect Venturi between burner bevel and housing, both streams of pressurized gas projected out of the burner allows noticeable cooling of it in its region of exit.

Dans l'exemple choisi, l'angle ' entre chaque biseau 10 de la surface extérieure du brûleur et la face intérieure 11 du logement en regard est d'une dizaine de degrés, et la face de sortie du brûleur est en retrait à l'intérieur du logement, d'une distance comprise environ dans la gamme de quelques dizièmes de millimètres à une dizaine de millimètres.In the example chosen, the angle  'between each bevel 10 of the outer surface of the burner and the face interior 11 of the housing opposite is about ten degrees, and the burner outlet face is set back at the interior of the accommodation, from a distance of approximately the range from a few tenths of a millimeter to ten millimeters.

Comme on l'a vu, le brûleur peut être logé directement dans la paroi réfractaire de l'enceinte ou dans une pièce rapportée faisant office d'ouvreau ; cette deuxième solution permet le contrôle de l'usure de cette pièce, qui est consommable.As we have seen, the burner can be housed directly in the refractory wall of the enclosure or in an attached piece serving as a workman; this second solution allows the control of the wear of this part, which is consumable.

En conclusion, cette structure de brûleur permet, grâce à la forme des fentes 7, 8, d'obtenir une flamme plate ; de plus, un dimensionnement approprié tel que ceux qui ont été donnés à titre d'exemple permet d'obtenir que cette flamme soit molle et dissymétrique.In conclusion, this burner structure allows, thanks to the shape of the slots 7, 8, to obtain a flat flame; moreover, an appropriate dimensioning such as those which have been given by way of example allows this flame to be obtained either soft and asymmetrical.

Le processus mis en oeuvre grâce à cette structure est le suivant : on introduit dans la région d'entrée du brûleur des courants séparés de gaz combustible sous pression et de gaz comburant sous pression, et on transmet dans le brûleur de manière séparée ces deux courants de gaz à des chambres 3, 4 séparées au moyen desquels on équilibre les pressions respectives des deux courants de gaz ; puis on évacue vers une région de sortie du brûleur les gaz des chambres d'équilibrage en deux courants séparés, et on projette les deux courants de gaz sous pression hors du brûleur par deux fentes de sortie 7, 8 respectives séparées et adjacentes ménagées dans la région de sortie, sous la forme de deux courants laminaires adjacents, dans la flamme ; ainsi, on mélange seulement partiellement les deux gaz dans la flamme, et celle-ci présente un profil ayant une région où le comburant est en excès et qui détermine de son côté une région oxydante dans l'enceinte, et une région où le comburant est en défaut ce qui détermine de son côté une région réductrice dans l'enceinte. The process implemented thanks to this structure is as follows: we introduce in the entry region of burner separate streams of pressurized combustible gas and oxidizing gas under pressure, and we transmit in the burner separately these two gas streams at separate bedrooms 3, 4 by means of which the respective pressures of the two gas streams; then we discharges gases to the burner outlet region balancing chambers in two separate streams, and we projects the two streams of pressurized gas out of the burner by two respective separate outlet slots 7, 8 and adjacent to the exit region in the form of two adjacent laminar currents in the flame; so we only partially mixes the two gases in the flame, and this one has a profile having a region where the oxidizer is in excess and which in turn determines a region oxidizing in the enclosure, and a region where the oxidant is in defect which in turn determines a reducing region in the enclosure.

Ainsi, si l'on projette les deux courants de gaz sous pression hors du brûleur dans une enceinte 13 intérieurement de forme générale approximativement cylindrique, transversalement et approximativement tangentiellement (figure 4), la flamme 14 épouse la forme circulaire intérieure de l'enceinte en définissant dans celle-ci d'un côté une zone oxydante 15 et de l'autre une zone réductrice 16.So if we project the two gas streams under pressure outside the burner in an enclosure 13 internally of general shape approximately cylindrical, transversely and approximately tangentially (figure 4), the flame 14 follows the shape inner circular of the enclosure by defining therein on one side an oxidizing zone 15 and on the other a zone reducing 16.

Par exemple, si le comburant est introduit du côté du centre de l'enceinte 13, et le combustible du côté de la paroi, on obtient dans l'enceinte une région centrale oxydante permettant de traiter dans des conditions optimales les articles en verre ou en cristal. En revanche, le combustible est piégé entre la lame d'oxygène et la paroi, ce qui permet sa combustion complète. Ainsi, on réduit les émissions d'oxyde de carbone vers le local où se trouve l'enceinte. De plus, la dissymétrie de la flamme assure une réduction de la production des oxydes d'azote.For example, if the oxidizer is introduced from the side from the center of the enclosure 13, and the fuel from the side of the wall, we obtain in the enclosure an oxidizing central region allowing optimal treatment of glass or crystal articles. However, the fuel is trapped between the oxygen slide and the wall, which allows its complete combustion. This reduces oxide emissions of carbon to the room where the enclosure is located. In addition, the flame asymmetry reduces production nitrogen oxides.

On notera que la structure extérieurement symétrique du brûleur permet de retourner celui-ci face pour face dans son logement donc d'inverser la région oxydante et la région réductrice dans l'enceinte, ce qui offre une grande souplesse d'utilisation puisqu'elle permet de créer à volonté au-dessus du verre une atmosphère réductrice ou oxydante.Note that the externally symmetrical structure of the burner allows you to turn it face to face in its housing therefore to reverse the oxidizing region and the region reducing in the enclosure, which offers great flexibility of use since it allows to create at will above glass a reducing or oxidizing atmosphere.

Bien entendu, l'invention pourra être adaptée à des applications particulières.Of course, the invention can be adapted to specific applications.

Par exemple, on pourra mettre l'invention en oeuvre pour le maintien en température des distributeurs dits "feeders" des fours à verre, qui sont actuellement chauffés généralement par des brûleurs aéro-combustibles qui ont une consommation importante (ils fonctionnent à l'air froid), qui génèrent une grande volatilisation du verre et en particulier des borosilicates, qui ont une action corrosive, qui ont un fonctionnement pouvant être dangereux car il s'agit de brûleurs à prémélange, et qui émettent de grandes quantités de gaz nocifs dans le local.For example, the invention can be implemented for maintaining the temperature of the so-called dispensers "feeders" for glass ovens, which are currently heated generally by air-fuel burners which have a high consumption (they work with cold air), which generate a great volatilization of the glass and in particular borosilicates, which have a corrosive action, which have a operation can be dangerous because it is premix burners, which emit large amounts of harmful gases in the room.

Claims (16)

  1. Method of heating products in a chamber (13) by means of a flame (14) produced by a burner at least partly housed in a housing made in a wall of the chamber, possibly via a mounted quarl, in which method separate streams of pressurized combustible gas and pressurized oxidizer gas are introduced into an entry region of the burner, the two gas streams are transmitted separately in the burner to separate chambers (3, 4) by means of which the respective pressures of the two gas streams are balanced, the gases from the balancing chambers are removed to an exit region of the burner as two separate streams, the two pressurized gas streams are expelled from the burner via two separate and adjacent respective outlet slots (7, 8) made in the exit region, in the form of two adjacent laminar flows, into the flame (14), in order for the two gases to be mixed only partially in this flame so that the latter exhibits a flame profile having a region in which the oxidizer is in excess and which thus in turn determines an oxidizing chamber region and at least one region in which the oxidizer is deplete and which thus in turn determines a reducing chamber region.
  2. Method according to Claim 1, characterized in that the two pressurized gas streams are expelled from the burner into a chamber (13), which internally is of approximately cylindrical overall shape, transversely and approximately tangentially so that the flame (14) follows the internal circular shape of the chamber, thus defining in the latter, an oxidizing region (15) on one side and a reducing region (16) on the other.
  3. Method according to either of Claims 1 and 2, characterized in that an air stream, induced by the two pressurized gas streams expelled from the burner, is also introduced into the chamber via at least one channel (12) defined between an outer face (10) of the burner and an inner face (11) of the housing in the chamber or in the quarl.
  4. Method according to any one of Claims 1 to 3, characterized in that two air streams induced on each side of the two adjacent gas streams, namely the fuel and the oxidizer streams respectively, are also introduced into the chamber via two channels (12), each channel being defined between an outer face (10) of the burner and an inner face (11) of the housing in the chamber or in the quarl.
  5. Burner for producing a flame (14) in a chamber (13) for heating products derived from two gas streams emanating from an outlet region of the burner, comprising two separate inlet channels (1, 2), for a pressurized combustible gas and for a pressurized oxidizer gas respectively, at least two separate balancing chambers (3, 4), for the fuel and for the oxidizer respectively, one of the said two balancing chambers being connected to the inlet channel for the fuel and the other chamber being connected to the inlet channel for the oxidizer, and two separate outlet channels (5, 6), for the fuel and for the oxidizer respectively, one of the two outlet channels being connected to the chamber (3) for the fuel and the other being connected to the chamber (4) for the oxidizer, emerging from the burner in the outlet region of the latter via two adjacent slots (7, 8), at least the two outlet channels (5, 6) being separated by a partition (9) having opposed walls defining the outlet channel (5) for the fuel and the outlet channel (6) for the oxidizer, respectively, with a respective wall of the burner on the opposite side from the partition.
  6. Burner according to Claim 5, characterized in that each balancing chamber (3, 4) comprises at least two compartments (3A, 3B, 4A, 4B) which follow one another from the upstream to the downstream of the burner and are connected via ducts (3C, 4C).
  7. Burner according to Claim 6, characterized in that the ducts (3C, 4C) lie in a region between two compartments, making the latter communicate with each other near a wall of the burner on the opposite side from a partition (9) between the chambers (3, 4) for the fuel and for the oxidizer, respectively.
  8. Burner according to any one of Claims 5 to 7, characterized in that the walls of the partition (9) are approximately plane and parallel.
  9. Burner according to any one of Claims 5 to 8, characterized in that the wall of each outlet channel (5, 6) which is on the opposite side from a wall of the partition (9) is approximately plane and parallel to this wall of the partition.
  10. Burner according to any one of Claims 5 to 8, characterized in that the wall of each outlet channel (5, 6) which is on the opposite side from a wall of the partition (9) extends in the direction of the outlet region, converging very slightly on this wall of the partition.
  11. Burner according to any one of Claims 5 to 8, or 10, characterized in that the outlet channels (5, 6) extend towards the outlet region in very slightly convergent directions.
  12. Burner according to any one of Claims 5 to 11, characterized in that the slots (7, 8) have a height of the order of one tenth of a millimetre to a few millimetres.
  13. Burner according to any one of Claims 5 to 12, characterized in that the slots (7, 8) have a length of several centimetres.
  14. Burner according to any one of claims 5 to 13, characterized in that the chambers (3, 4) comprise approximately parallelepipedal compartments (3A, 3B, 4A, 4B).
  15. Burner according to any one of Claims 5 to 14, characterized in that externally it has approximately the shape of a parallelepiped with at least two bevels (10) and having a face in which the two inlet channels (1, 2) emerge and a face which is approximately parallel to it, in which the two adjacent slots (7, 8) lie, the two bevels (10) joining the face having the slots (7, 8) respectively to two faces parallel to the partition (9).
  16. Burner according to any one of Claims 5 to 15, characterized in that the ratio of the length of the outlet channel to the height of the corresponding slot is at least approximately 20.
EP99900951A 1998-02-10 1999-01-19 Method for heating products in an enclosure and burner for carrying out the method Expired - Lifetime EP1055084B1 (en)

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FR9801556A FR2774745B1 (en) 1998-02-10 1998-02-10 PROCESS FOR HEATING PRODUCTS IN AN ENCLOSURE AND BURNER FOR THE IMPLEMENTATION OF THIS PROCESS
FR9801556 1998-02-10
PCT/FR1999/000092 WO1999041548A1 (en) 1998-02-10 1999-01-19 Method for heating products in a chamber and burner for implementing said method

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Families Citing this family (3)

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GB9930562D0 (en) * 1999-12-23 2000-02-16 Boc Group Plc Partial oxidation of hydrogen sulphide
GB2449267A (en) * 2007-05-15 2008-11-19 Alstom Technology Ltd Cool diffusion flame combustion
EP3715713A1 (en) * 2019-03-26 2020-09-30 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Compact flame-curtain burner, method for operating the burner and use of the method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199866A (en) * 1992-03-30 1993-04-06 Air Products And Chemicals, Inc. Adjustable momentum self-cooled oxy/fuel burner for heating in high temperature environments

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE413283C (en) * 1925-05-05 Faconeisen Walzwerk L Mannstae Gas firing for steam boilers and rotating drums
DE8528265U1 (en) * 1985-10-04 1985-12-19 Messer Griesheim Gmbh, 6000 Frankfurt External mixing fuel gas-oxygen burner
US5302112A (en) * 1993-04-09 1994-04-12 Xothermic, Inc. Burner apparatus and method of operation thereof
DE19704802A1 (en) * 1997-02-08 1998-08-13 Ruhrgas Ag Device and method for burning fuel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199866A (en) * 1992-03-30 1993-04-06 Air Products And Chemicals, Inc. Adjustable momentum self-cooled oxy/fuel burner for heating in high temperature environments

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WO1999041548A1 (en) 1999-08-19
FR2774745A1 (en) 1999-08-13
DE69900591D1 (en) 2002-01-24
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EP1055084A1 (en) 2000-11-29
BR9907802A (en) 2000-10-17
CZ20002795A3 (en) 2001-08-15
DE69900591T2 (en) 2002-07-18
FR2774745B1 (en) 2000-03-17
ES2169941T3 (en) 2002-07-16
CZ297869B6 (en) 2007-04-18
CN1290333A (en) 2001-04-04

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