EP0893651A1 - Burner for liquid and gaseous fuel with low nitric oxyde emission - Google Patents
Burner for liquid and gaseous fuel with low nitric oxyde emission Download PDFInfo
- Publication number
- EP0893651A1 EP0893651A1 EP98430018A EP98430018A EP0893651A1 EP 0893651 A1 EP0893651 A1 EP 0893651A1 EP 98430018 A EP98430018 A EP 98430018A EP 98430018 A EP98430018 A EP 98430018A EP 0893651 A1 EP0893651 A1 EP 0893651A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- air supply
- liquid
- orifices
- hearth
- 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
Links
Images
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
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
- F23D17/002—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
-
- 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
- F23C2202/00—Fluegas recirculation
- F23C2202/20—Premixing fluegas with fuel
-
- 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
- F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
- F23C2900/09002—Specific devices inducing or forcing flue gas recirculation
Definitions
- the present invention relates to fuel burners liquids and gases with low emission of nitrogen oxides.
- the main application of the invention is its use for burn both liquid and gaseous fuel while reducing the formation of nitrogen oxides for each of these fuel, which burner is intended to be mounted in the wall an enclosure such as the combustion chamber or hearth of an oven or a boiler.
- the problem posed is in fact to be able to produce a burner which either truly mixed, i.e. both liquid fuel and gaseous fuel, capable of operating separately or in combination time, and in which the formation of nitrogen oxides as well of origin thermal than fuel for gas and for liquid, i.e. minimized with performance you can't get with any device known to date.
- a solution to the problem posed is a fuel burner liquid and gaseous comprising a central duct and orifice primary air supply, fuel injection means liquid in a hearth and arranged inside said central orifice in the axis of the latter, a flame stabilizer arranged coaxially to inside this central orifice, at least one orifice for supplying secondary air located outside the fuel injection means liquids and the central primary air port, and injection means gaseous fuels arranged in a ring between the means of liquid fuel injection and the at least orifice in secondary air supply; according to the invention this burner comprises a recirculation circuit for the smoke from the hearth by suctioning it outside the at least secondary air supply port and reinjection into the hearth at the injection means of the gaseous fuel.
- the flue gas recirculation circuit according to the present invention comprises at least one common exchange wall thermal with the air supply and distribution circuit secondary, which allows such fumes to be cooled before they are reinjected into the hearth and therefore improves the performance of the burner.
- the staging of air in addition to that of the gas supply although not specifically necessary for a such fuel, however, improves its performance: indeed also reduces the production of combustible nitrogen oxide in addition to that of thermal origin, the production of which is also reduced by recirculating the fumes and by staging the injection of fuel itself.
- Figure 1 is a simplified sectional view along II 'of the figure 2 and passing through the longitudinal axis XX 'of the burner according to the invention.
- Figure 2 is a front view of the burner of Figure 1 from inside the foyer.
- Such a burner comprises in a known manner as described in patent application EP774620, a conduit with a central orifice supply of primary air 4, injection means 8 of liquid fuel in the hearth 2 and arranged inside said orifice 4 central in the axis of the latter, a flame stabilizer 5 disposed coaxially inside this central opening 4, and at least one opening 13 secondary air supply located outside the means 8 for injecting liquid fuel and the central primary air port 4; means 7 for injecting gaseous fuel are furthermore, arranged, but here without being optional since necessary, in a crown between the injection means 8 of liquid fuel and the at least orifice 13 for supplying secondary air.
- Said orifice 13 for secondary air supply perhaps consisting of a single annular passage or consisting of several supply conduits also arranged along the same diameter in a ring, outside said injection means 7, 8, gaseous and liquid fuels respectively.
- said liquid and gaseous fuel burner comprises a ring 3 1 made of refractory material comprising all of the air supply, fuel injection and recirculation of smoke, it is mounted through the refractory wall 1 of the hearth 2 so that its front face, through which open said orifices, is projecting relative thereto.
- the secondary air supply is produced by multiple orifices 13 which are placed peripherally staggered between the smoke extraction orifices 14 in the hearth 2; these suction orifices 14 can themselves be replaced by a only peripheral annular passage, but the arrangement in orifices multiple placed in staggered rows avoids sucking in air secondary in said smoke suction orifices and conversely to prevent this secondary air supply prevents said fumes from being sucked in to be recirculated in the head of the burner.
- Said means 7 for injecting gaseous fuel and said means for re-injecting the fumes which are preferably therefore coaxial and have their orifices 9 combined, are located in a ring device around the fuel flame stabilizer 5 liquid.
- the injection means 7 of the gaseous fuel can be, on the one hand, separate feeding rods arranged in a ring around the means 8 for injecting the liquid fuel such as shown in Figure 1; said injection rods 7 can be located in the primary air supply duct 4, or be replaced by nozzles mounted on a single ring also arranged peripherally in a ring around the injection means 8 of the liquid fuel, and supplied by a single supply rod 7.
- these can have multiple orifices thus creating several independent flames in the hearth 2 which can be either directed parallel to the axis XX 'of the burner, either divergent and oriented towards the secondary air supply orifices 13 for improve the combustion of said liquid fuel after a first combustion phase with primary air; such a divergence of flames, being less necessary in terms of fuel gaseous.
Abstract
Description
La présente invention a pour objet des brûleurs à combustibles liquides et gazeux à faible émission d'oxydes d'azote.The present invention relates to fuel burners liquids and gases with low emission of nitrogen oxides.
L'application principale de l'invention est son utilisation pour brûler à la fois un combustible liquide et un combustible gazeux tout en diminuant la formation d'oxydes d'azote pour chacun de ces combustibles, lequel brûleur étant destiné à être monté dans la paroi d'une enceinte telle que la chambre de combustion ou foyer d'un four ou d'une chaudière.The main application of the invention is its use for burn both liquid and gaseous fuel while reducing the formation of nitrogen oxides for each of these fuel, which burner is intended to be mounted in the wall an enclosure such as the combustion chamber or hearth of an oven or a boiler.
On connaít certes divers types de brûleurs dans lesquels la disposition des différents circuits d'alimentation et d'injection sont conçus pour diminuer au maximum la formation d'oxydes d'azote NO, NO2, mais qui sont en général conçus pour brûler essentiellement un seul combustible de base soit liquide soit gazeux.We certainly know various types of burners in which the arrangement of the various supply and injection circuits are designed to minimize the formation of nitrogen oxides NO, NO 2 , but which are generally designed to essentially burn a only basic fuel, either liquid or gaseous.
On peut citer pour cela par exemple, les demandes de brevet déposées par le même présent demandeur telles que, pour ce qui concerne un brûleur à combustible gazeux, la demande de brevet FR2718222 publiée le 6 octobre 1995 sur "des perfectionnements de brûleurs à combustible gazeux à très faible émission d'oxydes d'azote" ; dans l'introduction de cette demande de brevet, on rappelle, comme pour la présente invention, que les oxydes d'azote sont dûs à deux origines différentes qui sont, l'une basée sur l'oxydation de l'azote de l'air de combustion lui-même (appelé oxyde d'azote thermique) qui est celui essentiellement produit avec les combustibles gazeux, et l'autre due à l'oxydation des composés azotés existant dans le combustible au cours de la pyrolyse à l'intérieur de la flamme (appelé oxyde d'azote combustible) et qui concerne essentiellement les combustibles liquides. Ainsi dans le cas de la demande de brevet rappelée ci-dessus qui s'applique à des combustibles gazeux, il a été principalement recherché de diminuer l'oxyde d'azote thermique, d'une part en diminuant la température de la flamme par un étagement de la combustion grâce à des arrivées séparées de combustible et d'autre part, en réduisant la teneur en oxygène de la flamme en recombinant et recirculant les fumées produites dans le foyer avec l'air de combustion suivant une disposition particulière des orifices d'injection.We can cite for this, for example, patent applications filed by the same present applicant such as, for what relates to a gas fuel burner, the patent application FR2718222 published on October 6, 1995 on "improvements to gaseous fuel burners with very low emission of nitrogen oxides "; in the introduction to this patent application, we recall, as for the present invention, that the nitrogen oxides are due to two different origins which are, one based on the oxidation of nitrogen from the combustion air itself (called thermal nitrogen oxide) which is the one mainly produced with gaseous fuels, and the other due to the oxidation of nitrogen compounds existing in the fuel at during pyrolysis inside the flame (called nitrogen oxide fuel) and which mainly concerns liquid fuels. Thus in the case of the patent application mentioned above which applies to gaseous fuels, it has been mainly researched to reduce thermal nitrogen oxide, on the one hand by reducing the flame temperature by staging the combustion by means of separate fuel and secondly by reducing the content in flame oxygen by recombining and recirculating the fumes produced in the hearth with combustion air according to a layout particular injection ports.
Dans d'autres demandes de brevet telles que la demande EP774620 intitulée "Brûleur à combustible liquide ou gazeux à très faible émission d'oxydes d'azote", l'objectif principal est de réduire l'oxyde d'azote combustible surtout pour une utilisation avec du combustible fluide en utilisant, d'une part des dispositifs d'étagement d'alimentation en air, et d'autre part en séparant l'injection du combustible en plusieurs flammes indépendantes et divergentes pour qu'elles reçoivent un flux d'air additionnel après une première phase de combustion grâce à l'étagement d'alimentation de l'air ; dans cette demande de brevet, il est certes mentionné qu'on peut rajouter également des cannes de combustible gazeux, mais le brûleur ne comporte pas de dispositif spécifique pour réduire l'oxyde d'azote thermique, ce qui rend un tel dispositif moins efficace dans une utilisation mixte.In other patent applications such as EP774620 entitled "Very low emission liquid or gaseous fuel burner of nitrogen oxides ", the main objective is to reduce nitrogen oxide fuel especially for use with fluid fuel in using, on the one hand, air supply staging devices, and on the other hand by separating the fuel injection into several flames independent and divergent so that they receive an air flow additional after a first combustion phase thanks to the staging air supply; in this patent application it is certainly mentioned that we can also add fuel rods gas, but the burner does not have a specific device for reduce thermal nitrogen oxide, which makes such a device less effective in mixed use.
Le problème posé est en effet de pouvoir réaliser un brûleur qui soit vraiement mixte c'est à dire à la fois à combustible liquide et à combustible gazeux, pouvant fonctionner séparément ou en même temps, et dans lequel la formation d'oxydes d'azote aussi bien d'origine thermique que combustible pour le gaz et pour le liquide, soit minimisée avec des performances que l'on n'obtient avec aucun dispositif connu à ce jour.The problem posed is in fact to be able to produce a burner which either truly mixed, i.e. both liquid fuel and gaseous fuel, capable of operating separately or in combination time, and in which the formation of nitrogen oxides as well of origin thermal than fuel for gas and for liquid, i.e. minimized with performance you can't get with any device known to date.
Une solution au problème posé est un brûleur à combustible liquide et gazeux comprenant un conduit et orifice central d'alimentation en air primaire, des moyens d'injection de combustible liquide dans un foyer et disposés à l'intérieur dudit orifice central dans l'axe de ce dernier, un stabilisateur de flammes disposé coaxialement à l'intérieur de cet orifice central, au moins un orifice d'alimentation en air secondaire situé à l'extérieur des moyens d'injection de combustibles liquides et de l'orifice central d'air primaire, et des moyens d'injection de combustibles gazeux disposés en couronne entre les moyens d'injection de combustibles liquides et le au moins orifice en alimentation en air secondaire ; selon l'invention ce brûleur comporte un circuit de recirculation des fumées du foyer par aspiration de celles-ci à l'extérieur du au moins orifice d'alimentation en air secondaire et réinjection dans le foyer au niveau des moyens d'injection du combustible gazeux. A solution to the problem posed is a fuel burner liquid and gaseous comprising a central duct and orifice primary air supply, fuel injection means liquid in a hearth and arranged inside said central orifice in the axis of the latter, a flame stabilizer arranged coaxially to inside this central orifice, at least one orifice for supplying secondary air located outside the fuel injection means liquids and the central primary air port, and injection means gaseous fuels arranged in a ring between the means of liquid fuel injection and the at least orifice in secondary air supply; according to the invention this burner comprises a recirculation circuit for the smoke from the hearth by suctioning it outside the at least secondary air supply port and reinjection into the hearth at the injection means of the gaseous fuel.
On remarquera qu'une telle solution emprunte une partie des éléments décrits et connus dans la demande de brevet EP774620 qui peut être considéré comme l'art antérieur le plus proche, et dans lequel on a combiné un circuit de recirculation des fumées du foyer qui était connu par ailleurs tel que la demande de brevet FR2718222 mais suivant une disposition spécifique permettant d'obtenir un véritable brûleur mixte, alors que les dispositifs précédents, utilisant la recirculation des fumées, étaient dédiés aux seuls brûleurs à combustibles gazeux. En particulier, on notera dans les modes de réalisation décrits ci-après, que l'aspiration des fumées est réalisée extérieurement à tout conduit d'injection de combustible et d'air. De plus, suivant un mode de réalisation préférentiel, le circuit de recirculation des fumées du foyer suivant la présente invention comporte au moins une paroi commune d'échange thermique avec le circuit d'alimentation et de distribution en air secondaire, ce qui permet de refroidir de telles fumées avant qu'elles ne soient réinjectées dans le foyer et donc améliore les performances du brûleur.It will be noted that such a solution borrows part of the elements described and known in patent application EP774620 which can be considered the closest prior art, and in which there is combined a recirculation circuit of the smoke from the hearth which was known moreover such as patent application FR2718222 but according to a specific arrangement for obtaining a real mixed burner, whereas the previous devices, using smoke recirculation, were dedicated only to gaseous fuel burners. In particular, it will be noted in the embodiments described below, that the aspiration smoke is produced outside any injection pipe of fuel and air. In addition, according to one embodiment preferential, the flue gas recirculation circuit according to the present invention comprises at least one common exchange wall thermal with the air supply and distribution circuit secondary, which allows such fumes to be cooled before they are reinjected into the hearth and therefore improves the performance of the burner.
Le résultat est de nouveaux brûleurs mixtes à combustibles liquides et gazeux, et non pas liquides ou gazeux, qui offrent des caractéristiques de réduction d'oxyde d'azote à la fois thermique et combustible, combinant ainsi les effets de l'ensemble des demandes de brevet telles que celles citées ci-dessus, avec de plus un effet résultant supplémentaire puisque permettant de faire fonctionner un tel brûleur, non seulement avec l'un des combustibles gazeux ou liquides, mais également avec les deux en même temps, tout en limitant la production d'azote des deux sources de combustible. De tels brûleurs sont également utilisables avec une seule des deux sources de combustible en faisant alors bénéficier à celle-ci des dispositions d'alimentation qui sont destinées à l'origine à l'autre combustible mais qui ne peuvent être que bénéfique également pour l'autre. En particulier, pour un usage en brûleur de gaz seul, l'étagement de l'air en plus de celui de l'alimentation en gaz, bien que non spécifiquement nécessaire pour un tel combustible, en améliore cependant la performance : en effet on réduit également la production d'oxyde d'azote combustible en plus de celui d'origine thermique, dont la production est diminuée par ailleurs grâce à la recirculation des fumées et par l'étagement de l'injection du combustible lui-même. The result is new combination fuel burners liquids and gases, not liquids or gases, which provide nitrogen oxide reduction characteristics both thermal and fuel, thus combining the effects of all the demands for patents such as those cited above, with further effect additional since allowing to operate such a burner, not only with one of the gaseous or liquid fuels, but also with both at the same time, while limiting production nitrogen from both fuel sources. Such burners are can also be used with only one of the two fuel sources then making it benefit from the feeding provisions which are originally intended for the other fuel but which cannot be that also benefits the other. In particular, for use in gas burner only, the staging of air in addition to that of the gas supply, although not specifically necessary for a such fuel, however, improves its performance: indeed also reduces the production of combustible nitrogen oxide in addition to that of thermal origin, the production of which is also reduced by recirculating the fumes and by staging the injection of fuel itself.
On pourrait citer d'autres avantages de la présente invention mais ceux cités ci-dessus en montrent déjà suffisamment pour en prouver la nouveauté et l'intérêt.One could cite other advantages of the present invention but those cited above already show enough to prove the novelty and interest.
La description et les figures ci-après représentent un exemple de réalisation de l'invention mais n'ont aucun caractère limitatif : d'autres réalisations sont possibles dans le cadre de la portée de l'étendue de cette invention, en particulier en utilisant des systèmes d'alimentation en air primaire ainsi qu'en combustibles gazeux etc... différents.The description and the figures below represent an example of realization of the invention but have no limiting character: others achievements are possible within the scope of the scope of this invention, especially using power systems in primary air as well as in gaseous fuels etc ... different.
La figure 1 est une vue en coupe simplifiée suivant II' de la figure 2 et passant par l'axe XX' longitudinal du brûleur suivant l'invention.Figure 1 is a simplified sectional view along II 'of the figure 2 and passing through the longitudinal axis XX 'of the burner according to the invention.
La figure 2 est une vue de face du brûleur de la figure 1 depuis l'intérieur du foyer.Figure 2 is a front view of the burner of Figure 1 from inside the foyer.
Un tel brûleur comprend d'une manière connue telle que décrite
dans la demande de brevet EP774620, un conduit à orifice central
d'alimentation 4 en air primaire, des moyens d'injection 8 de
combustible liquide dans le foyer 2 et disposés à l'intérieur dudit orifice
4 central dans l'axe de ce dernier, un stabilisateur de flamme 5 disposé
coaxialement à l'intérieur de cet orifice central 4, et au moins un orifice
13 d'alimentation en air secondaire situé à l'extérieur des moyens
d'injection 8 de combustible liquide et de l'orifice central d'air primaire
4 ; des moyens d'injection 7 de combustible gazeux sont en outre,
disposés, mais ici sans être en option puisque nécessaires, en couronne
entre les moyens d'injection 8 de combustible liquide et le au moins
orifice 13 d'alimentation en air secondaire.Such a burner comprises in a known manner as described
in patent application EP774620, a conduit with a central orifice
supply of primary air 4, injection means 8 of
liquid fuel in the
Ledit orifice 13 d'alimentation en air secondaire peut-être
constitué par un passage annulaire unique ou constitué de plusieurs
conduits d'alimentation également disposés suivant un même diamètre
en couronne, à l'extérieur desdits moyens d'injection 7, 8,
respectivement des combustibles gazeux et liquides.Said
Tel que représenté sur les figures 1 et 2, le dit brûleur à
combustible liquide et gazeux suivant l'invention, comporte un anneau
31 en matériau réfractaire comprenant l'ensemble des orifices
d'alimentation en air, d'injection de combustible et de recirculation des
fumées, celui-ci est monté à travers la paroi réfractaire 1 du foyer 2 de
telle façon que sa face avant, à travers laquelle débouchent lesdits
orifices, soit en saillie par rapport à celle-ci. As shown in FIGS. 1 and 2, said liquid and gaseous fuel burner according to the invention comprises a
Suivant les figures jointes, l'alimentation en air secondaire est
réalisée par des orifices multiples 13 qui sont placés périphériquement
en quinconce entre les orifices 14 d'aspiration des fumées dans le foyer
2 ; ces orifices 14 d'aspiration peuvent être eux-mêmes remplacés par un
seul passage annulaire périphérique, mais la disposition en orifices
multiples placés en quinconce permet d'éviter de réaspirer l'air
secondaire dans lesdits orifices d'aspiration de fumées et
réciproquement d'éviter que cette alimentation d'air secondaire
empêche lesdites fumées d'être aspirées pour être recirculées dans la tête
du brûleur.According to the attached figures, the secondary air supply is
produced by
Par contre, suivant l'invention, ces deux fluides s'échangent leurs calories, mais à l'intérieur du brûleur, grâce en particulier à au moins une paroi 101 commune séparant :
- d'une part un
caisson 10 de distribution des dites fumées recirculées, alimenté d'un côté par les orifices d'aspiration 11 desdites fumées dans lefoyer 2, et réinjectant celles-ci, après donc refroidissement, dans desconduits 9 de réinjection dans le foyer, à travers lesquels débouchent également les moyens d'injection 7 du combustible gazeux, - d'autre part, un caisson de
distribution 14 de l'air secondaire, qui d'un côté est alimenté par un conduit d'alimentation 12 et d'un autre côté, après donc réchauffement de cet air secondaire, injecte celui-ci dans le foyer par lesorifices 13 tels que définis précédemment.
- on the one hand a
box 10 for distributing said recirculated fumes, supplied on one side by thesuction orifices 11 of said fumes in thehearth 2, and reinjecting these, after cooling, inconduits 9 for reinjection into the hearth, through which also the injection means 7 of the gaseous fuel open, - on the other hand, a
distribution box 14 for the secondary air, which on one side is supplied by asupply duct 12 and on the other hand, after this secondary air has therefore warmed up, injects it into the hearth through theorifices 13 as defined above.
Lesdits moyens d'injection 7 de combustible gazeux et lesdits
moyens de réinjection des fumées qui de manière préférentielle sont
donc coaxiaux et ont leurs orifices 9 confondus, sont situés en couronne
périphérique autour du stabilisateur de flammes 5 du combustible
liquide.Said means 7 for injecting gaseous fuel and said
means for re-injecting the fumes which are preferably
therefore coaxial and have their
Pour créer un étagement de l'arrivée d'air par rapport à la flamme
du combustible liquide, l'ensemble des orifices d'injection de ce
combustible ainsi que de ceux du combustible gazeux, et d'alimentation
en air primaire débouche au fond d'une cuvette 6 ; celle-ci est disposée
en creux par rapport à la paroi réfractaire 3 qui l'entoure et à travers
laquelle débouchent lesdits orifices 13 d'alimentation en air secondaire
et sont aspirées également les fumées du foyer 2. Ladite cuvette peut
être de différentes formes, telle qu'en coupe suivant la figure 1 en tronc
de cône, et tel que du reste ceci est décrit dans la demande de brevet
EP774620.To create a staging of the air intake relative to the flame
liquid fuel, all of the injection ports of this
fuel as well as those of gaseous fuel, and feed
in primary air opens at the bottom of a
Les moyens d'injection 7 du combustible gazeux peuvent être,
d'une part des cannes d'alimentation séparées disposées en couronne
autour des moyens d'injection 8 du combustible liquide telles que
représentées sur la figure 1 ; lesdites cannes d'injection 7 peuvent être
situées dans le conduit 4 d'alimentation en air primaire, ou être
remplacées par des buses montées sur un seul anneau disposé également
périphériquement en couronne autour du moyen d'injection 8 du
combustible liquide, et alimentées par une seule canne d'alimentation 7.The injection means 7 of the gaseous fuel can be,
on the one hand, separate feeding rods arranged in a ring
around the
En ce qui concerne les moyens d'injection 8 du combustible
liquide, ceux-ci peuvent comporter des orifices multiples créant ainsi
plusieurs flammes indépendantes dans le foyer 2 qui peuvent être soit
dirigées parallèlement à l'axe XX' du brûleur, soit divergentes et
orientées vers les orifices d'alimentation 13 en air secondaire pour
améliorer la combustion dudit combustible liquide après une première
phase de combustion avec l'air primaire ; une telle divergence de
flammes, étant moins nécessaire en ce qui concerne le combustible
gazeux.Regarding the fuel injection means 8
liquid, these can have multiple orifices thus creating
several independent flames in the
D'autres améliorations et dispositifs complémentaires pourraient être rajoutés sur un tel brûleur suivant l'invention, en utilisant des caractéristiques déjà décrites dans les demandes de brevet précédentes du même demandeur telles que celles citées en introduction : de tels compléments de caractéristiques étant déjà décrits dans ces demandes de brevet, n'ont pas besoin d'être repris dans la présente description mais ne pourraient en aucun cas être considérés comme étant des perfectionnements brevetables, puisque tout homme du métier connaissant l'ensemble de cet art antérieur, pourrait apporter de telles améliorations sans sortir du cadre de la présente demande de brevet et sans faire preuve d'activité inventive.Other improvements and complementary devices could be added to such a burner according to the invention, using features already described in previous patent applications from the same applicant such as those cited in the introduction: such additional features already described in these requests for patent, need not be repeated in this description but cannot in any case be considered as patentable improvements, since any person skilled in the art knowing all of this prior art, could bring such improvements without going beyond the scope of this patent application and without showing inventive step.
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9709594A FR2766557B1 (en) | 1997-07-22 | 1997-07-22 | LIQUID AND GASEOUS FUEL BURNERS WITH LOW EMISSION OF NITROGEN OXIDES |
| FR9709594 | 1997-07-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0893651A1 true EP0893651A1 (en) | 1999-01-27 |
| EP0893651B1 EP0893651B1 (en) | 2002-11-20 |
Family
ID=9509725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19980430018 Expired - Lifetime EP0893651B1 (en) | 1997-07-22 | 1998-07-10 | Burner for liquid and gaseous fuel with low nitric oxyde emission |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0893651B1 (en) |
| DE (1) | DE69809502T2 (en) |
| FR (1) | FR2766557B1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001063176A1 (en) * | 2000-02-24 | 2001-08-30 | John Zink Company, L.L.C. | LOW NOx EMISSIONS BURNER ASSEMBLY AND METHOD FOR REDUCING THE NOx CONTENT OF FURNACE FLUE GAS |
| EP2314921A2 (en) | 2009-10-21 | 2011-04-27 | Fives Pillard | Method of operating a boiler |
| WO2015154969A1 (en) * | 2014-04-10 | 2015-10-15 | Sofinter S.P.A. | Burner |
| CN107606613A (en) * | 2017-09-27 | 2018-01-19 | 西安交通大学 | The low nitrogen rotational flow gas-fired combustor of flue gas recirculation built in gas-air Accurate Classification |
| CN111853775A (en) * | 2019-04-29 | 2020-10-30 | 上海全颉环境设备有限公司 | Burner head with internal recirculation and burner comprising such a burner head |
| CN115264533A (en) * | 2022-07-24 | 2022-11-01 | 哈尔滨工程大学 | Natural gas coaxial staged combustion chamber adopting center ignition and combustion method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3217779A (en) * | 1963-07-18 | 1965-11-16 | Zink Co John | Gas and liquid fuel burner combination |
| FR2378236A1 (en) * | 1977-01-21 | 1978-08-18 | Ward Trevor | SELF-RECOVERING BURNER |
| FR2468833A1 (en) * | 1979-11-02 | 1981-05-08 | Hague Int | RECYCLING BURNER AND METHOD OF IMPLEMENTING SAID BURNER |
| DE3327597A1 (en) * | 1983-07-30 | 1985-02-07 | Deutsche Babcock Werke AG, 4200 Oberhausen | METHOD AND BURNER FOR BURNING LIQUID OR GASEOUS FUELS WITH REDUCED NOX PRODUCTION |
| EP0229231A2 (en) * | 1986-01-13 | 1987-07-22 | Deutsche Babcock Werke Aktiengesellschaft | Burner for the combustion of fuels with reduced production of nitric oxides |
| EP0348646A2 (en) * | 1988-06-30 | 1990-01-03 | Deutsche Babcock Energie- Und Umwelttechnik Aktiengesellschaft | Burner |
| US5092761A (en) * | 1990-11-19 | 1992-03-03 | Exxon Chemical Patents Inc. | Flue gas recirculation for NOx reduction in premix burners |
| US5284438A (en) * | 1992-01-07 | 1994-02-08 | Koch Engineering Company, Inc. | Multiple purpose burner process and apparatus |
| EP0675321A1 (en) * | 1994-03-29 | 1995-10-04 | ENTREPRISE GENERALE DE CHAUFFAGE INDUSTRIEL PILLARD. Société anonyme dite: | Gas burners with very low nitrogen oxide emissions |
| US5458481A (en) * | 1994-01-26 | 1995-10-17 | Zeeco, Inc. | Burner for combusting gas with low NOx production |
| EP0774620A1 (en) | 1995-11-14 | 1997-05-21 | ENTREPRISE GENERALE DE CHAUFFAGE INDUSTRIEL PILLARD. Société anonyme dite: | Liquid or gaseous fuel burner with very low nitric oxides emission |
-
1997
- 1997-07-22 FR FR9709594A patent/FR2766557B1/en not_active Expired - Fee Related
-
1998
- 1998-07-10 EP EP19980430018 patent/EP0893651B1/en not_active Expired - Lifetime
- 1998-07-10 DE DE1998609502 patent/DE69809502T2/en not_active Expired - Lifetime
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3217779A (en) * | 1963-07-18 | 1965-11-16 | Zink Co John | Gas and liquid fuel burner combination |
| FR2378236A1 (en) * | 1977-01-21 | 1978-08-18 | Ward Trevor | SELF-RECOVERING BURNER |
| FR2468833A1 (en) * | 1979-11-02 | 1981-05-08 | Hague Int | RECYCLING BURNER AND METHOD OF IMPLEMENTING SAID BURNER |
| DE3327597A1 (en) * | 1983-07-30 | 1985-02-07 | Deutsche Babcock Werke AG, 4200 Oberhausen | METHOD AND BURNER FOR BURNING LIQUID OR GASEOUS FUELS WITH REDUCED NOX PRODUCTION |
| EP0229231A2 (en) * | 1986-01-13 | 1987-07-22 | Deutsche Babcock Werke Aktiengesellschaft | Burner for the combustion of fuels with reduced production of nitric oxides |
| EP0348646A2 (en) * | 1988-06-30 | 1990-01-03 | Deutsche Babcock Energie- Und Umwelttechnik Aktiengesellschaft | Burner |
| US5092761A (en) * | 1990-11-19 | 1992-03-03 | Exxon Chemical Patents Inc. | Flue gas recirculation for NOx reduction in premix burners |
| US5284438A (en) * | 1992-01-07 | 1994-02-08 | Koch Engineering Company, Inc. | Multiple purpose burner process and apparatus |
| US5458481A (en) * | 1994-01-26 | 1995-10-17 | Zeeco, Inc. | Burner for combusting gas with low NOx production |
| EP0675321A1 (en) * | 1994-03-29 | 1995-10-04 | ENTREPRISE GENERALE DE CHAUFFAGE INDUSTRIEL PILLARD. Société anonyme dite: | Gas burners with very low nitrogen oxide emissions |
| FR2718222A1 (en) | 1994-03-29 | 1995-10-06 | Pillard Ent Gle Chauffage Indl | Improvements in gas fuel burners with very low nitrogen oxide emissions. |
| EP0774620A1 (en) | 1995-11-14 | 1997-05-21 | ENTREPRISE GENERALE DE CHAUFFAGE INDUSTRIEL PILLARD. Société anonyme dite: | Liquid or gaseous fuel burner with very low nitric oxides emission |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001063176A1 (en) * | 2000-02-24 | 2001-08-30 | John Zink Company, L.L.C. | LOW NOx EMISSIONS BURNER ASSEMBLY AND METHOD FOR REDUCING THE NOx CONTENT OF FURNACE FLUE GAS |
| EP2314921A2 (en) | 2009-10-21 | 2011-04-27 | Fives Pillard | Method of operating a boiler |
| WO2015154969A1 (en) * | 2014-04-10 | 2015-10-15 | Sofinter S.P.A. | Burner |
| CN106415127A (en) * | 2014-04-10 | 2017-02-15 | 索斐特公司 | Burner |
| RU2689654C2 (en) * | 2014-04-10 | 2019-05-28 | Софинтер С.П.А. | Burner |
| CN106415127B (en) * | 2014-04-10 | 2020-09-15 | 索斐特公司 | Burner with a burner head |
| CN107606613A (en) * | 2017-09-27 | 2018-01-19 | 西安交通大学 | The low nitrogen rotational flow gas-fired combustor of flue gas recirculation built in gas-air Accurate Classification |
| CN111853775A (en) * | 2019-04-29 | 2020-10-30 | 上海全颉环境设备有限公司 | Burner head with internal recirculation and burner comprising such a burner head |
| CN115264533A (en) * | 2022-07-24 | 2022-11-01 | 哈尔滨工程大学 | Natural gas coaxial staged combustion chamber adopting center ignition and combustion method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69809502T2 (en) | 2003-07-17 |
| FR2766557A1 (en) | 1999-01-29 |
| EP0893651B1 (en) | 2002-11-20 |
| DE69809502D1 (en) | 2003-01-02 |
| FR2766557B1 (en) | 1999-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1144915B1 (en) | Burner-type apparatus and fuel combustion method | |
| EP1907754B1 (en) | Method and installation for unsupported lean fuel gas combustion, using a burner and related burner | |
| EP0675321B1 (en) | Gas burners with very low nitrogen oxide emissions | |
| EP1342955A1 (en) | Injection system for air-fuel mixture in a combustion chamber | |
| FR2535018A1 (en) | PULVERIZED CHARCOAL BURNER | |
| EP0984223B1 (en) | Combustion process for burning a fuel | |
| BE719847A (en) | ||
| EP0850200A1 (en) | METHOD AND DEVICE FOR REDUCING NOx EMISSION IN A GLASS FURNACE | |
| EP0242249B1 (en) | Burner with low polluting-gas emission | |
| EP0893651B1 (en) | Burner for liquid and gaseous fuel with low nitric oxyde emission | |
| EP0225344A1 (en) | Burner for liquid fuel boiler with combustion gas recycling circuit | |
| FR2706020A1 (en) | Combustion chamber assembly, in particular for a gas turbine; comprising separate combustion and vaporization zones. | |
| EP1074790B1 (en) | Burner with exhaust recirculation | |
| FR2514864A1 (en) | BURNER HEAD FOR COMBUSTION OF SOLID FUELS | |
| EP0313469A1 (en) | Gas burner for heating an air stream or other oxidant gas | |
| FR2695457A1 (en) | Gas burners for heating and heating water supplies - has venturi tubes each having injectors and supplying common parallel rectangular burners with perforated burner ramps | |
| WO2000040901A1 (en) | Device for improving gas fuel burning | |
| EP0094890A1 (en) | Boiler using solid fuel of the tube radiation furnace type, method for the transformation of a boiler and device for carrying it out | |
| EP1172607B1 (en) | Gas burner with increased power | |
| FR1449478A (en) | Improvements made to liquid fuel burners | |
| CA2972650C (en) | Solid-fuel combustion chamber | |
| EP0214010A1 (en) | Burner with a gasifying stage for a heating device, and heating device comprising such a burner | |
| EP0549416A1 (en) | Grid burner and heating installation comprising same | |
| CA3233988A1 (en) | Device for injecting dihydrogen and air | |
| EP0967437A1 (en) | Improvement to combustion apparatus with several combustion air inlet ducts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| 17P | Request for examination filed |
Effective date: 19990630 |
|
| AKX | Designation fees paid |
Free format text: DE ES GB IT |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): DE ES FR GB IT |
|
| RAX | Requested extension states of the european patent have changed |
Free format text: RO PAYMENT 19990927 |
|
| 17Q | First examination report despatched |
Effective date: 20010329 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT |
|
| AX | Request for extension of the european patent |
Free format text: RO PAYMENT 19990927 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20021120 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REF | Corresponds to: |
Ref document number: 69809502 Country of ref document: DE Date of ref document: 20030102 |
|
| GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 20021120 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030529 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20030821 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20090731 Year of fee payment: 12 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090710 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20110331 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100802 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20090728 Year of fee payment: 12 |
|
| PGRI | Patent reinstated in contracting state [announced from national office to epo] |
Ref country code: IT Effective date: 20110616 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20130717 Year of fee payment: 16 |
|
| PGRI | Patent reinstated in contracting state [announced from national office to epo] |
Ref country code: IT Effective date: 20110616 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 69809502 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150203 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 69809502 Country of ref document: DE Effective date: 20150203 |