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EP0862018A1 - Device for mounting a burner in a gas duct - Google Patents

Device for mounting a burner in a gas duct Download PDF

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Publication number
EP0862018A1
EP0862018A1 EP98430005A EP98430005A EP0862018A1 EP 0862018 A1 EP0862018 A1 EP 0862018A1 EP 98430005 A EP98430005 A EP 98430005A EP 98430005 A EP98430005 A EP 98430005A EP 0862018 A1 EP0862018 A1 EP 0862018A1
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EP
European Patent Office
Prior art keywords
burner
duct
head
outside
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98430005A
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German (de)
French (fr)
Other versions
EP0862018B1 (en
Inventor
Jean Claude Pillard
Jacques Pizant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Entreprise Generale de Chauffage Industriel Pillard SA
Original Assignee
Entreprise Generale de Chauffage Industriel Pillard SA
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Publication of EP0862018A1 publication Critical patent/EP0862018A1/en
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Publication of EP0862018B1 publication Critical patent/EP0862018B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • 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
    • F23C5/02—Structural details of mounting
    • F23C5/06—Provision for adjustment of burner position during operation
    • 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
    • F23C5/02—Structural details of mounting
    • 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
    • F23D14/24—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 at least one of the fluids being submitted to a swirling motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel gaseous or liquid fuel

Definitions

  • the subject of the present invention is a device for mounting burners in a gas pipe in which it circulates and which require burners to operate in atmospheres containing little oxygen.
  • the technical sector of the invention is the field of manufacture and assembly of combustion apparatus using liquid and / or gaseous fuels.
  • burners in afterburner gas exhaust ducts arranged after the gas turbines and upstream of boilers of recovery of cogeneration units: such burners allow raise the temperature of the turbine gases to 1800 ° C by example and thereby increase the efficiency of said boilers. Moreover, they make it possible to operate said boilers with air fresh oxidizer when the turbines are stopped.
  • the sheaths in which the gases to be heated or reheated circulate are several meters wide and high, usually around 6 m, also knowing that the exhaust gases from the turbines are already about 500 ° C or more, to work on such burner heads, you must therefore stop the circulation of hot air and wait for the cooling of the assembly before being able to enter the sheath to access said burners.
  • the problem is thus to be able to intervene on heads of burners comprising at least one fuel injection pipe liquid, possibly also with gas injection pipes, placed along the same axis and inside conduits where a gas to be heated or reheated, in order to be able to repair, modify or simply clean said injection nozzles without having to stopping said circulation of gas in said conduit for too long.
  • a solution to the problem posed is a device for mounting a such a burner inside a gas pipe and comprising at least a fuel injection nozzle with a nose placed in the head of said burner along an axis parallel to that of said duct; following the invention said injection rod is located inside a sheath supply of air outside the duct to the burner head, is integral, which sheath is arranged transversely to the axis of said conduit; and said cane nose located at the end of a bent part thereof, is movable along said axis of the burner by relative to a guide orifice integral with said burner head which it is capable of being disengaged by displacement, from outside the duct and inside the barrel, the injection rod, which is then completely extractable to and from outside the duct.
  • the entire head of the burner and its air supply sleeve are extractable also transversely and out of the duct from outside of this, in particular thanks to at least one hollow post, vertical or inclined and preferably less than 45 ° relative to the vertical; this post is disposed in said duct, suspended from its upper part and supporting horizontal raceways on which are laid support and guide means of said burner head; said vertical or inclined hollow support pole is thus cooled by air circulation inside its own volume by pulling effect natural or by forced ventilation.
  • the invention also comprises at least two flaps arranged on the side on the other side of the burner head, tilting around transverse axes audit led and whose shapes, compatible with those inside the duct and the outer ones of the burner head, ensure in position closed the reduction of the gas passage section through at least that of the burner head; preferably said flaps and their axes are also hollow and connected to a vertical or inclined hollow duct, as the vertical or inclined hollow post supporting said heads burners, to also ensure circulation cooling of internal air by natural draft effect or by ventilation.
  • Such flaps make it possible to reduce the cross section of the gases to be heated especially when it is fresh combustion air, and not afterburner gases from gas turbines when these are by example stopped.
  • burner mounting devices placed inside a gas pipe such as those exhaust from gas turbines: these devices solve the problem installed without having the disadvantages of burners known to date, since on the one hand they make it possible to extract the injection rod (s) from liquid fuel from outside the duct without having to exit the entire burner and therefore practically without stopping the circulation of gas to be heated, and on the other hand to extract the entire the burner head itself quickly enough without having to wait for the sheath cooling; this limits the downtime of installations, especially those of post-combustion cogeneration gas turbines for which production losses are then the more important the longer the stop; following this invention these downtimes are reduced to the absolute minimum by making such easily accessible and removable burners which presents a very important interest in the development of such units in all industries.
  • the present invention can be adapted to all types of burners such as those described by way of exemplary embodiment in the figures below; the design of these burners is taken from that described in patent FR2570473 filed in 1984 by the same applicant that the present invention the company EGCI PILLARD and describing parallel flow gas burners with a rosette and a means of hanging flames.
  • Figure 1 is a cross-sectional view of a gas circulation in which a burner mounted according to the device of the present invention.
  • Figure 2 is an enlarged view of the burner of Figure 1 following the same axis.
  • FIG. 3 is a top view in partial section of the burner Figure 2.
  • Figure 4 is a sectional view along IV, IV 'of the gas pipe of figure 1.
  • Figure 5 is a sectional view along V, V 'of the same conduit Figure 1 gas.
  • Figures 4 and 5 in fact show a section of the gas conduit 1 27 flowing inside thereof and which is of course connected on these inlet and outlet faces to a sheath which can be connected upstream to a gas turbine and downstream to a recovery boiler;
  • Figure 1 is a view from the upstream part with a burner head 2 1 in the operating position inside the duct 1 and a second head 2 2 not shown since completely extracted from the duct with the installation of a false door 7 2 or guillotine closing the extraction passage section of said head 2 2 and making it possible to operate the installation without this burner 2 2 .
  • a vertical or inclined hollow post 20 is placed in the duct and suspended from its upper part: this vertical post 1 can expand downwards by crossing the lower part of the sheath 1 thanks to a cable gland 20 2 hot gases and thus leaving free the expansion of said post 20 which can be isolated and internally cooled by an outside air circulation 21 1 in natural draft or by ventilation.
  • Said vertical post 20 1 supports the horizontal raceways 22 on which are placed support and guide means 23 such as one or more rollers disposed at the bottom of said head 2 of the burner and having a corresponding shape and cooperating with that of the selected raceways 22.
  • the latter can bear and be maintained on plates integral with the post 20 while remaining free to expand longitudinally relative to these plates; optionally these raceways, preferably in number 2, can also consist of hollow support tubes, insulated like the support post 20 and cooled by internal air circulation.
  • the burners used comprise in a known manner at least a fuel injection nozzle 3, the nose 5 of which is disposed in the head 2 of said burner along an axis XX 'parallel to that of said line 1: according to the invention, said injection pipe 3 is located at the inside of a sheath 6 for supplying air outside the duct 1, the head 2 of the burner with which it is integral; said sheath is arranged along an axis YY 'transverse to that of said conduit 1; and said nose 5 of the rod 3, located at the end of a bent part 4 thereof, is movable along the axis XX 'relative to a guide hole 14 integral with said burner head 2 from which it is capable of being released by displacement of the injection rod 3, from outside the duct 1 and inside the sleeve 6.
  • the injection rod is associated for example with a rotating shaft 8 for maneuvering from the outside of the duct 1, located in the sheath 6, parallel to the rod 3 and carrying at least at its distal end a gear 9 2 which comes to cooperate with a rack 10; the latter being located at the end 16 of the sleeve 6 on the side of the head 2 of the burner, the rotation of said gear 9 by the operating shaft 8 causes its movement and that of the injection rod 3 along this rack 10 for engaging and disengaging the nose 5 of the rod 3 relative to the head 2 of the burner.
  • the injection pipe is shown in Figure 3 in operating position in solid lines 4, 3a and extractability position in dotted lines 4 b, 3 b.
  • Another gear 9 1 or any end piece making it possible to engage an operating key such as a square or a hexagon, is located at the other end of the shaft 8 remaining outside the conduit 1 and makes it possible to ensure the setting in rotation of this shaft 8.
  • said rod is integral with a centering guide 11 lateral keeping it at a constant distance along the walls of the sheath 6 which are parallel; this guide 11 or the bent part 4 of the rod 3 can be a support on a stop 30 disposed along said walls in order to maintain the longitudinal position of said rod 3 inside the sheath 6, until the nose 5 injection located at the end of the bent part 4 of the injection rod 3 is guided and properly positioned in the orifice 14 of the injection head which in the case of the examples of the figures is a single central orifice arranged along the axis XX 'of the burner.
  • Said burner head 2 also comprises a shutter 16 of the end of the sheath 6 opening laterally along the axis XX 'and downstream of the gas circulation 27 in a shell 16 1 itself closed by a plate stabilizer 13 comprising orifices, such as tangential slots or holes parallel to the axis XX ′ or inclined, for the outlet of external air supplied by said sheath 6, and said orifice 14 for guiding the injection nose 5.
  • a external cylinder 12 surrounds at least said ferrule 16 1 and the stabilizing plate 13.
  • the surface of the useful gas passage section 27 inside of said cylinder 12 is equal to 20 to 50% of the useful cross-sectional area of the duct 1 in which said burner is located, said percentage being in fact to be considered in proportion to gas in stoichiometric air.
  • said burner head 2 comprises blades 15 for rotating the gas, fixed around the ferrule 16 1 for air outlet 16 at the end of the sleeve 6, and injection nozzles 17 for gaseous fuel disposed through and between said blades 15 along axes parallel to that of the duct 1, or convergent or divergent.
  • Said inclined blades 15 may be surrounded by a cylindrical hoop 28 delimiting a peripheral ring 31 with the outer cylinder 12.
  • This said outer cylinder 12 is an air director which can be possibly convergent and diverge respectively at its upstream orifice 12 1 and its downstream orifice 12 2 .
  • Said injection lances 17 of gaseous fuels passing through said inclined fins 15 inject the gas downstream from the plane of the front face of the stabilizing plate 13.
  • the assembly constituted by said inclined blades 15, forming a rosette, constitute with said stabilizing plate 13 the flame catcher as described in the previously cited patent FR 2570473.
  • Said gas fuel lances 17 may be in number any represented here in number of 6 and come to be connected on at least one gas manifold 18, which can be toroidal in shape revolution as shown in Figure 3 and thus constituted upstream converging openings of said cylinder 12; said collector 18 is connected to the outside by a fuel gas supply tube 19.
  • the axis YY 'of the sleeve 6 is arranged perpendicular to the axis XX 'of the burner and the duct 1 but it could be tilted at any other angle transverse, preferably between 45 and 90 ° relative to the axis of said conduit.
  • the invention also comprises at least two flaps 24 arranged on either side of the burner head 2, tilting around axes 25 transverse to that of said conduit 1 and whose shapes, compatible with that inside the duct 1 and that outside the head 2 of the burner, ensure in the closed position the reduction of the section of passage of the gas through at least that of the head 1 of the burner.
  • said flaps 24 and their axes 25 are hollow and connected to a vertical pipe 26 also hollow; all of these parts internal hollow which can also be connected to the hollow post vertical 20 support for the burner heads 2.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Gas Burners (AREA)
  • Control Of Combustion (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Combustion Of Fluid Fuel (AREA)

Abstract

The apparatus comprises a fuel injection tube (3) with its tip located in the head (2) of the burner along an axis parallel to that of the duct. The injection tube is situated inside a sleeve (6) which delivers air from outside the duct to the burner head, to which it is fixed, and is situated transversely relative to the axis of the duct. The tip of the tube, situated at the end of a bend in the tube, can be moved along the axis of the duct in relation to a guide aperture in the head. The tube itself can be completely removed from the duct, and is linked to a rotary shaft (8) with a pinion (92) on its end engaging with a rack (10) on the end of the sleeve.

Description

La présente invention a pour objet un dispositif de montage de brûleurs dans un conduit de gaz dans lequel circule celui-ci et qui nécessitent des brûleurs destinés à fonctionner dans les atmosphères contenant peu d'oxygène.The subject of the present invention is a device for mounting burners in a gas pipe in which it circulates and which require burners to operate in atmospheres containing little oxygen.

Le secteur technique de l'invention est le domaine de la fabrication et du montage d'appareil à combustion utilisant des combustibles liquides et/ou gazeux.The technical sector of the invention is the field of manufacture and assembly of combustion apparatus using liquid and / or gaseous fuels.

Une des applications principales de l'invention est le montage de brûleurs dans des conduits d'évacuation de gaz de postcombustion disposés après les turbines à gaz et en amont de chaudières de récupération d'unité de cogénération : de tels brûleurs permettent de rehausser la température des gaz de turbines jusqu'à 1800° C par exemple et d'augmenter ainsi le rendement desdites chaudières. De plus, ils permettent de faire fonctionner lesdites chaudières avec de l'air comburant frais quand les turbines sont à l'arrêt.One of the main applications of the invention is the mounting of burners in afterburner gas exhaust ducts arranged after the gas turbines and upstream of boilers of recovery of cogeneration units: such burners allow raise the temperature of the turbine gases to 1800 ° C by example and thereby increase the efficiency of said boilers. Moreover, they make it possible to operate said boilers with air fresh oxidizer when the turbines are stopped.

D'autres applications sont également possibles pour le réchauffage de gaines gazeuses notamment à faible taux d'oxygène tel que dans les installations de réchauffage de fumées...Other applications are also possible for reheating gaseous sheaths, in particular with a low oxygen content such as in smoke heating systems ...

Il existe à ce jour quatre types de brûleurs correspondant aux applications ci-dessus ; soit si on les classe par leur mode de construction :

  • les brûleurs à rampes utilisant uniquement le gaz comme seul combustible et qui sont disposés d'une manière fixe à l'intérieur de ladite gaine de gaz à chauffer ;
  • les brûleurs à rampes à gaz et à fuel oil léger comprenant des rampes à gaz fixes comme précédemment et qui viennent s'intercaler entre des têtes de combustion pour le fuel léger, tels que ceux décrits dans la demande de brevet FR 2285574 ; l'ensemble de ces rampes et têtes sont solidaires et ne permettent pas d'utiliser du fuel lourd qui ne peut pas être réparti d'une façon homogène entre les différentes têtes, l'équilibrage sans comptage de débit de fuel oil lourd étant quasiment impossible avec précision du fait du risque de figeage, des écarts de perte de charge en fonction des longueurs des lignes d'alimentation et des différences de hauteur des brûleurs. C'est pour cela que dans les brûleurs à fuel oil lourd il n'est en général utilisé qu'une seule canne d'injection centrale ;
  • les brûleurs latéraux ou extérieurs, dont l'axe de la flamme est perpendiculaire ou incliné par rapport au sens d'écoulement des gaz à réchauffer, c'est-à-dire à l'axe d'écoulement principal de la gaine ou du conduit (dont le terme anglais dans ce domaine technique est "duct"). Cette disposition permet de placer le ou les brûleurs à l'extérieur de la gaine à condition de protéger la flamme d'axe sécant, soit en la plaçant dans un logement complètement extérieur à la gaine, le brûleur ne réchauffant pas alors directement les gaz mais jouant le rôle de générateur de gaz chauds, soit en disposant la flamme à l'intérieur de la gaine et en la protégeant par une sorte de déflecteur intérieur pour écarter les gaz à réchauffer de cette flamme transversale, afin d'éviter qu'elle ne soit trop perturbée et ne produise une trop grande quantité d'imbrûlés. Cette disposition présente cependant de multiples inconvénients notamment : il est difficile d'adapter exactement la dimension de la flamme ou des flammes aux dimensions de la gaine ; la chaudière de récupération située en aval du ou des brûleurs ne récupère pas le rayonnement des flammes, d'où une perte de rendement obligeant un surdimensionnement ; les flammes transversales sont toujours plus ou moins perturbées par l'écoulement des gaz à réchauffer qui ont un faible taux d'oxygène ce qui provoque des imbrûlés ; les cotés de la gaine peuvent être détériorés par la proximité des extrémités de flamme ;
  • les brûleurs que l'on peut qualifier "d'inducts" puisque disposés entièrement à l'intérieur d'une gaine de circulation de gaz (voir ci-dessus l'origine du mot "duct") ; ce mode d'installation qui est celui utilisé pour les brûleurs de la présente invention, présente l'axe d'écoulement du brûleur parallèle à celui d'écoulement de la gaine ; le nombre des brûleurs ainsi installés est faible, en général toujours égal ou inférieur à 6 et même de préférence 2 ; ils sont alimentés en combustibles liquide ou gazeux par des conduits reliés au coté de la gaine. Ces brûleurs ont d'une part beaucoup plus de possibilité que ceux des deux premiers modes de construction cités ci-dessus puisqu'ils permettent d'utiliser indifféremment tous types de combustibles qu'ils soient liquide, léger, lourd ou gazeux, et d'autre part donnent des résultats de combustion supérieurs à ceux décrits dans le troisième mode décrits ci-dessus du fait de leur positionnement beaucoup plus logique dans l'axe et vers le centre de la gaine ; par contre contrairement aux brûleurs latéraux ou extérieurs, mais comme ceux des deux premiers modes cités, ils sont d'accès très difficile et pour les démonter, les modifier ou les réparer il est nécessaire d'entrer dans la gaine. Ceci n'est pas trop gênant pour des brûleurs à rampes à gaz seul ou même à fuel léger, car les risques d'avoir à opérer des réglages et à effectuer des opérations d'entretien sur de telles rampes sont plus réduits que quand on utilise du fuel oil lourd. Cependant, l'utilisation de gaz spéciaux, tels que des gaz hydrogénés ou entraínant des particules liquides tels que les gaz de raffinerie, nécessite de pouvoir accéder également pour démontage et entretien aux injecteurs de gaz.
To date, there are four types of burners corresponding to the above applications; either if we classify them by their construction method:
  • ramp burners using only gas as the sole fuel and which are arranged in a fixed manner inside said gas sheath to be heated;
  • gas burners and light fuel oil burners comprising fixed gas burners as above and which are interposed between combustion heads for light fuel oil, such as those described in patent application FR 2285574; all of these ramps and heads are integral and do not allow the use of heavy fuel which cannot be distributed in a homogeneous manner between the different heads, balancing without counting the flow of heavy fuel oil being almost impossible precisely because of the risk of freezing, pressure drop differences as a function of the lengths of the supply lines and differences in height of the burners. This is why in heavy fuel oil burners, in general, only one central injection nozzle is used;
  • lateral or external burners, the axis of the flame of which is perpendicular or inclined with respect to the direction of flow of the gases to be heated, i.e. the main flow axis of the sheath or duct (whose English term in this technical field is "duct"). This arrangement makes it possible to place the burner (s) outside the sheath provided that the flame of the secant axis is protected, either by placing it in a housing completely external to the sheath, the burner then not directly heating the gases but playing the role of generator of hot gases, either by placing the flame inside the sheath and by protecting it with a kind of internal deflector to separate the gases to be heated from this transverse flame, in order to prevent it from is too disturbed and does not produce too much unburnt material. However, this arrangement has numerous drawbacks, in particular: it is difficult to exactly adapt the size of the flame or flames to the dimensions of the sheath; the recovery boiler located downstream of the burner (s) does not recover the radiation from the flames, resulting in a loss of efficiency requiring oversizing; the transverse flames are always more or less disturbed by the flow of the gases to be heated which have a low oxygen rate which causes unburnt; the sides of the sheath can be damaged by the proximity of the flame ends;
  • the burners which can be described as "inducts" since they are placed entirely inside a gas circulation sheath (see above the origin of the word "duct"); this installation mode, which is that used for the burners of the present invention, has the flow axis of the burner parallel to that of the flow of the sheath; the number of burners thus installed is small, in general always equal to or less than 6 and even preferably 2; they are supplied with liquid or gaseous fuels by conduits connected to the side of the sheath. These burners have on the one hand much more possibility than those of the first two modes of construction cited above since they make it possible to use indifferently all types of fuel whether they are liquid, light, heavy or gaseous, and on the other hand give combustion results superior to those described in the third mode described above due to their much more logical positioning in the axis and towards the center of the sheath; on the other hand unlike the side or external burners, but like those of the first two modes mentioned, they are very difficult to access and to disassemble, modify or repair it is necessary to enter the sheath. This is not too annoying for burners with gas burners alone or even with light fuel, because the risks of having to make adjustments and carry out maintenance operations on such burners are lower than when using heavy fuel oil. However, the use of special gases, such as hydrogenated gases or entraining liquid particles such as refinery gases, requires access to disassembly and maintenance also to the gas injectors.

Or les gaines dans lequel circule les gaz à chauffer ou à réchauffer ont plusieurs mètres de large et de haut, couramment de l'ordre de 6 m, aussi sachant que les gaz d'échappement des turbines sont déjà à environ 500° C ou plus, pour intervenir sur de telles têtes de brûleurs, il faut donc arrêter la circulation d'air chaud et attendre le refroidissement de l'ensemble avant de pouvoir pénétrer dans la gaine pour accéder auxdits brûleurs.Or the sheaths in which the gases to be heated or reheated circulate are several meters wide and high, usually around 6 m, also knowing that the exhaust gases from the turbines are already about 500 ° C or more, to work on such burner heads, you must therefore stop the circulation of hot air and wait for the cooling of the assembly before being able to enter the sheath to access said burners.

Le problème posé est ainsi de pouvoir intervenir sur des têtes de brûleurs comportant au moins une canne d'injection de combustible liquide, avec également éventuellement des cannes d'injection de gaz, placées suivant le même axe et à l'intérieur de conduits où circule un gaz à chauffer ou à réchauffer, afin de pouvoir réparer, modifier ou simplement nettoyer lesdites cannes d'injection et cela sans avoir à arrêter trop longtemps ladite circulation de gaz dans ledit conduit.The problem is thus to be able to intervene on heads of burners comprising at least one fuel injection pipe liquid, possibly also with gas injection pipes, placed along the same axis and inside conduits where a gas to be heated or reheated, in order to be able to repair, modify or simply clean said injection nozzles without having to stopping said circulation of gas in said conduit for too long.

Une solution au problème posé est un dispositif de montage d'un tel brûleur à l'intérieur d'un conduit de gaz et comprenant au moins une canne d'injection de combustible dont le nez est disposé dans la tête dudit brûleur suivant un axe parallèle à celui dudit conduit ; suivant l'invention ladite canne d'injection est située à l'intérieur d'un fourreau d'alimentation, en air extérieur au conduit, de la tête du brûleur dont il est solidaire, lequel fourreau est disposé transversalement par rapport à l'axe dudit conduit ; et ledit nez de la canne situé à l'extrémité d'une partie coudée de celle-ci, est mobile suivant ledit axe du brûleur par rapport à un orifice de guidage solidaire de ladite tête de brûleur dont il est apte à être dégagé par déplacement, depuis l'extérieur du conduit et à l'intérieur du fourreau, de la canne d'injection, qui est alors complètement extractible vers et depuis l'extérieur du conduit.A solution to the problem posed is a device for mounting a such a burner inside a gas pipe and comprising at least a fuel injection nozzle with a nose placed in the head of said burner along an axis parallel to that of said duct; following the invention said injection rod is located inside a sheath supply of air outside the duct to the burner head, is integral, which sheath is arranged transversely to the axis of said conduit; and said cane nose located at the end of a bent part thereof, is movable along said axis of the burner by relative to a guide orifice integral with said burner head which it is capable of being disengaged by displacement, from outside the duct and inside the barrel, the injection rod, which is then completely extractable to and from outside the duct.

Dans un mode préférentiel de réalisation l'ensemble de la tête du brûleur et de son fourreau d'alimentation en air sont extractibles également transversalement et hors du conduit depuis l'extérieur de celui-ci, grâce en particulier à au moins un poteau creux, vertical ou incliné et de préférence de moins de 45° par rapport à la verticale ; ce poteau est disposé dans ledit conduit, suspendu à sa partie supérieure et supportant des chemins de roulement horizontaux sur lesquels sont posés des moyens d'appui et de guidage de ladite tête du brûleur ; ledit poteau vertical ou incliné creux support est ainsi refroidi par circulation d'air à l'intérieur de son propre volume par effet de tirage naturel ou par ventilation forcée.In a preferred embodiment, the entire head of the burner and its air supply sleeve are extractable also transversely and out of the duct from outside of this, in particular thanks to at least one hollow post, vertical or inclined and preferably less than 45 ° relative to the vertical; this post is disposed in said duct, suspended from its upper part and supporting horizontal raceways on which are laid support and guide means of said burner head; said vertical or inclined hollow support pole is thus cooled by air circulation inside its own volume by pulling effect natural or by forced ventilation.

Suivant un mode de réalisation préférentiel le dispositif suivant l'invention comporte également au moins deux volets disposés de part et d'autre de la tête du brûleur, basculant autour d'axes transversaux audit conduit et dont les formes, compatibles avec celles intérieures du conduit et celles extérieures de la tête du brûleur, assurent en position fermée la réduction de la section de passage du gaz à travers au moins celle de la tête du brûleur ; de préférence lesdits volets et leurs axes sont également creux et reliés à un conduit vertical ou incliné creux, comme le poteau vertical ou incliné creux support desdites têtes des brûleurs, afin d'en assurer également le refroidissement par circulation d'air interne par effet de tirage naturel ou par ventilation.According to a preferred embodiment, the following device the invention also comprises at least two flaps arranged on the side on the other side of the burner head, tilting around transverse axes audit led and whose shapes, compatible with those inside the duct and the outer ones of the burner head, ensure in position closed the reduction of the gas passage section through at least that of the burner head; preferably said flaps and their axes are also hollow and connected to a vertical or inclined hollow duct, as the vertical or inclined hollow post supporting said heads burners, to also ensure circulation cooling of internal air by natural draft effect or by ventilation.

De tels volets permettent de réduire la section de passage des gaz à chauffer en particulier quand il s'agit d'air comburant frais, et non des gaz de postcombustion de turbines à gaz quand celles-ci sont par exemple arrêtées.Such flaps make it possible to reduce the cross section of the gases to be heated especially when it is fresh combustion air, and not afterburner gases from gas turbines when these are by example stopped.

Le résultat est de nouveaux dispositifs de montage de brûleurs dits "inducts" placés à l'intérieur d'un conduit de gaz tels que ceux d'échappement de turbines à gaz : ces dispositifs répondent au problème posé sans avoir les inconvénients des brûleurs connus à ce jour, puisque d'une part ils permettent d'extraire la ou les cannes d'injection de combustible liquide depuis l'extérieur de la gaine sans avoir à sortir l'ensemble du brûleur et sans donc pratiquement d'arrêt de la circulation de gaz à réchauffer, et d'autre part d'extraire l'ensemble de la tête de brûleur elle-même assez rapidement sans avoir à attendre le refroidissement de la gaine ; ceci limite la durée d'arrêt des installations, surtout celles de cogénération en postcombustion de turbines à gaz pour lesquelles les pertes de production sont alors d'autant plus importantes que l'arrêt est long ; suivant la présente invention ces temps d'arrêt sont réduits au strict minimum en rendant de tels brûleurs aisément accessibles et démontables ce qui présente un intérêt très important pour le développement de telles unités dans toutes industries.The result is new so-called burner mounting devices "inducts" placed inside a gas pipe such as those exhaust from gas turbines: these devices solve the problem installed without having the disadvantages of burners known to date, since on the one hand they make it possible to extract the injection rod (s) from liquid fuel from outside the duct without having to exit the entire burner and therefore practically without stopping the circulation of gas to be heated, and on the other hand to extract the entire the burner head itself quickly enough without having to wait for the sheath cooling; this limits the downtime of installations, especially those of post-combustion cogeneration gas turbines for which production losses are then the more important the longer the stop; following this invention these downtimes are reduced to the absolute minimum by making such easily accessible and removable burners which presents a very important interest in the development of such units in all industries.

De plus, la présente invention peut être adaptée à tous types de brûleurs tels que ceux décrits à titre d'exemple de réalisation dans les figures ci-après ; la conception de ces brûleurs est reprise de celle décrite dans le brevet FR2570473 déposé en 1984 par le même déposant que la présente invention la société EGCI PILLARD et décrivant des brûleurs à gaz à écoulement parallèle comportant une rosace et un moyen d'accrochage de flammes.In addition, the present invention can be adapted to all types of burners such as those described by way of exemplary embodiment in the figures below; the design of these burners is taken from that described in patent FR2570473 filed in 1984 by the same applicant that the present invention the company EGCI PILLARD and describing parallel flow gas burners with a rosette and a means of hanging flames.

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. La description et les figures ci-après représentent donc un exemple de réalisation de l'invention mais n'a aucun caractère limitatif : d'autres réalisations sont possibles dans le cadre de la portée de l'étendue de cette invention en particulier comme indiqué ci-dessus en changeant le type de brûleur.One could cite other advantages of the present invention but those cited above already show enough to prove the novelty and interest. The description and the figures below represent therefore an embodiment of the invention but has no character limiting: other realizations are possible within the scope of the scope of this invention in particular as stated above by changing the type of burner.

La figure 1 est une vue en coupe transversale d'un conduit de circulation de gaz dans lequel est disposé un brûleur monté suivant le dispositif de la présente invention.Figure 1 is a cross-sectional view of a gas circulation in which a burner mounted according to the device of the present invention.

La figure 2 est une vue agrandie du brûleur de la figure 1 suivant le même axe.Figure 2 is an enlarged view of the burner of Figure 1 following the same axis.

La figure 3 est une vue de dessus en coupe partielle du brûleur de la figure 2.Figure 3 is a top view in partial section of the burner Figure 2.

La figure 4 est une vue en coupe suivant IV,IV' du conduit de gaz de la figure 1.Figure 4 is a sectional view along IV, IV 'of the gas pipe of figure 1.

La figure 5 est une vue en coupe suivant V,V' du même conduit de gaz de la figure 1.Figure 5 is a sectional view along V, V 'of the same conduit Figure 1 gas.

Les figures 4 et 5 représentent en fait un tronçon du conduit 1 de gaz 27 circulant à l'intérieur de celui-ci et qui est bien sur raccordé sur ces faces d'entrée et de sortie à une gaine pouvant être reliée en amont à une turbine à gaz et en aval à une chaudière de récupération ; la figure 1 est une vue depuis la partie amont avec une tête de brûleur 21 en position de fonctionnement à l'intérieur du conduit 1 et une deuxième tête 22 non représentée puisque extraite complètement du conduit avec mise en place d'une fausse porte 72 ou guillotine obturant la section de passage d'extraction de ladite tête 22 et permettant de faire fonctionner l'installation sans ce brûleur 22.Figures 4 and 5 in fact show a section of the gas conduit 1 27 flowing inside thereof and which is of course connected on these inlet and outlet faces to a sheath which can be connected upstream to a gas turbine and downstream to a recovery boiler; Figure 1 is a view from the upstream part with a burner head 2 1 in the operating position inside the duct 1 and a second head 2 2 not shown since completely extracted from the duct with the installation of a false door 7 2 or guillotine closing the extraction passage section of said head 2 2 and making it possible to operate the installation without this burner 2 2 .

Les moyens de manutention et d'extraction desdites têtes ne sont pas représentés sur les différentes figures puisque pouvant être réalisés par un homme du métier sans qu'il soit besoin de le décrire dans la présente invention.The means for handling and extracting said heads are not not shown in the various figures since they can be produced by a person skilled in the art without it being necessary to describe it in the present invention.

Pour permettre un telle extraction complète hors du conduit 1 et depuis l'extérieur de celui-ci, de l'ensemble de la tête 2 du brûleur et du fourreau 6 d'alimentation en air extérieur de celle-ci, tel que décrit ci-après, un poteau 20 vertical ou incliné creux est disposé dans le conduit et suspendu à sa partie supérieure : ce poteau vertical 1 peut se dilater vers le bas en traversant la partie inférieure de la gaine 1 grâce à un presse-étoupe 202 étanche aux gaz chauds et laissant ainsi libre la dilatation dudit poteau 20 qui peut être isolé et refroidi intérieurement par une circulation d'air extérieur 211 en tirage naturel ou par ventilation.To allow such complete extraction from the duct 1 and from the outside thereof, of the assembly of the head 2 of the burner and of the sleeve 6 for supplying air outside the latter, as described below. afterwards, a vertical or inclined hollow post 20 is placed in the duct and suspended from its upper part: this vertical post 1 can expand downwards by crossing the lower part of the sheath 1 thanks to a cable gland 20 2 hot gases and thus leaving free the expansion of said post 20 which can be isolated and internally cooled by an outside air circulation 21 1 in natural draft or by ventilation.

Ledit poteau vertical 201 supporte les chemins de roulement 22 horizontaux sur lesquels sont posés des moyens d'appui 23 et de guidage tel que une ou plusieurs roulettes disposées à la partie inférieure de ladite tête 2 du brûleur et ayant une forme correspondant et coopérant avec celle des chemins de roulement 22 choisis. Ces derniers peuvent s'appuyer et être maintenus sur des platines solidaires du poteau 20 tout en restant libre de se dilater longitudinalement par rapport à ces platines ; optionnellement ces chemins de roulement de préférence en nombre 2 peuvent être également constitués de tubes creux de soutien, isolés comme le poteau support 20 et refroidis par circulation d'air interne.Said vertical post 20 1 supports the horizontal raceways 22 on which are placed support and guide means 23 such as one or more rollers disposed at the bottom of said head 2 of the burner and having a corresponding shape and cooperating with that of the selected raceways 22. The latter can bear and be maintained on plates integral with the post 20 while remaining free to expand longitudinally relative to these plates; optionally these raceways, preferably in number 2, can also consist of hollow support tubes, insulated like the support post 20 and cooled by internal air circulation.

L'ensemble de la tête 2 du brûleur et de ses moyens de déplacement pour son extraction, avec l'ensemble des conduits 6, 19 la relayant avec l'extérieur, est solidaire d'une tape de fermeture 71 représentée sur la figure 1 et qui assure la continuité du conduit 1 et de son isolation 11. The assembly of the head 2 of the burner and of its displacement means for its extraction, with the set of conduits 6, 19 relaying it with the outside, is integral with a closure tape 7 1 shown in FIG. 1 and which ensures the continuity of the conduit 1 and of its insulation 1 1 .

Les brûleurs utilisés comprennent d'une manière connue au moins une canne d'injection 3 de combustible dont le nez 5 est disposé dans la tête 2 dudit brûleur suivant un axe XX' parallèle à celui dudit conduit 1 : suivant l'invention ladite canne d'injection 3 est situé à l'intérieur d'un fourreau 6 d'alimentation, en air extérieur au conduit 1, de la tête 2 du brûleur dont il est solidaire ; ledit fourreau est disposé suivant un axe YY' transversal à celui dudit conduit 1 ; et ledit nez 5 de la canne 3, situé à l'extrémité d'une partie coudée 4 de celle-ci, est mobile suivant l'axe XX' par rapport à un orifice 14 de guidage solidaire de ladite tête 2 de brûleur dont il est apte à être dégagé par déplacement de la canne d'injection 3, depuis l'extérieur du conduit 1 et à l'intérieur du fourreau 6.The burners used comprise in a known manner at least a fuel injection nozzle 3, the nose 5 of which is disposed in the head 2 of said burner along an axis XX 'parallel to that of said line 1: according to the invention, said injection pipe 3 is located at the inside of a sheath 6 for supplying air outside the duct 1, the head 2 of the burner with which it is integral; said sheath is arranged along an axis YY 'transverse to that of said conduit 1; and said nose 5 of the rod 3, located at the end of a bent part 4 thereof, is movable along the axis XX 'relative to a guide hole 14 integral with said burner head 2 from which it is capable of being released by displacement of the injection rod 3, from outside the duct 1 and inside the sleeve 6.

Pour assurer ledit déplacement et l'extraction de la canne d'injection 3 vers et depuis l'extérieur du conduit, telle que représentée sur les figure 3 et 4, la canne d'injection est associée par exemple à un arbre tournant 8 de manoeuvre depuis l'extérieur du conduit 1, situé dans le fourreau 6, parallèle à la canne 3 et portant au moins à son extrémité distale un engrenage 92 qui vient coopérer avec une crémaillère 10 ; celle-ci étant située à l'extrémité 16 du fourreau 6 du coté de la tête 2 du brûleur, la rotation dudit engrenage 9 par l'arbre de manoeuvre 8 entraíne son déplacement et celui de la canne d'injection 3 le long de cette crémaillère 10 pour engager et dégager le nez 5 de la canne 3 par rapport à la tête 2 du brûleur. La canne d'injection est représentée sur la figure 3 en position de fonctionnement en traits pleins 4a,3a et en position d'extractibilité en traits pointillés 4b, 3b. Un autre engrenage 91, ou tout embout permettant d'engager une clef de manoeuvre tel qu'un carré ou un hexagone, est situé à l'autre extrémité de l'arbre 8 restant extérieur au conduit 1 et permet d'assurer la mise en rotation de cet arbre 8.To ensure said displacement and the extraction of the injection rod 3 towards and from outside the duct, as shown in FIGS. 3 and 4, the injection rod is associated for example with a rotating shaft 8 for maneuvering from the outside of the duct 1, located in the sheath 6, parallel to the rod 3 and carrying at least at its distal end a gear 9 2 which comes to cooperate with a rack 10; the latter being located at the end 16 of the sleeve 6 on the side of the head 2 of the burner, the rotation of said gear 9 by the operating shaft 8 causes its movement and that of the injection rod 3 along this rack 10 for engaging and disengaging the nose 5 of the rod 3 relative to the head 2 of the burner. The injection pipe is shown in Figure 3 in operating position in solid lines 4, 3a and extractability position in dotted lines 4 b, 3 b. Another gear 9 1 , or any end piece making it possible to engage an operating key such as a square or a hexagon, is located at the other end of the shaft 8 remaining outside the conduit 1 and makes it possible to ensure the setting in rotation of this shaft 8.

Pour maintenir la canne d'injection 3 dans un même plan lors de son déplacement suivant la direction XX' pour que l'engrenage 92 l'entraíne régulièrement le long de la crémaillère 10, ladite canne est solidaire d'un guide de centrage 11 latéral la maintenant à distance constante le long des parois du fourreau 6 qui sont parallèles ; ce guide 11 ou la partie coudée 4 de la canne 3 peut être un appui sur une butée 30 disposée le long desdites parois afin de maintenir la position longitudinale de ladite canne 3 à l'intérieur du fourreau 6, jusqu'à ce que le nez 5 d'injection situé à l'extrémité de la partie coudée 4 de la canne d'injection 3 soit guidée et bien positionnée dans l'orifice 14 de la tête d'injection qui dans le cas des exemples des figures est un orifice unique central disposé suivant l'axe XX' du brûleur.To keep the injection rod 3 in the same plane during its displacement in the direction XX 'so that the gear 9 2 regularly drives it along the rack 10, said rod is integral with a centering guide 11 lateral keeping it at a constant distance along the walls of the sheath 6 which are parallel; this guide 11 or the bent part 4 of the rod 3 can be a support on a stop 30 disposed along said walls in order to maintain the longitudinal position of said rod 3 inside the sheath 6, until the nose 5 injection located at the end of the bent part 4 of the injection rod 3 is guided and properly positioned in the orifice 14 of the injection head which in the case of the examples of the figures is a single central orifice arranged along the axis XX 'of the burner.

Ladite tête du brûleur 2 comprend également un obturateur 16 de l'extrémité du fourreau 6 s'ouvrant latéralement suivant l'axe XX' et vers l'aval de la circulation du gaz 27 dans une virole 161 fermée elle-même par une plaque stabilisatrice 13 comportant des orifices, tels que des fentes tangentielles ou des trous parallèles à l'axe XX' ou inclinés, de sortie d'air extérieur alimenté par ledit fourreau 6, et ledit orifice 14 de guidage du nez d'injection 5. Un cylindre externe 12 entoure au moins ladite virole 161 et la plaque stabilisatrice 13.Said burner head 2 also comprises a shutter 16 of the end of the sheath 6 opening laterally along the axis XX 'and downstream of the gas circulation 27 in a shell 16 1 itself closed by a plate stabilizer 13 comprising orifices, such as tangential slots or holes parallel to the axis XX ′ or inclined, for the outlet of external air supplied by said sheath 6, and said orifice 14 for guiding the injection nose 5. A external cylinder 12 surrounds at least said ferrule 16 1 and the stabilizing plate 13.

Il est à noter que l'alimentation en air extérieur à l'intérieur dudit fourreau 6 afin d'assurer le bon fonctionnement de la tête du brûleur 2, par un apport de 3 à 10 % de l'oxygène stoechiométrique nécessaire à la combustion, le reste étant apporté par le gaz 27 à chauffer, permet également de refroidir ledit fourreau 6 placé transversalement dans le conduit 1 et recevant du gaz 27 qui peut être à plus de 500 ° C.Note that the outside air supply inside said sheath 6 in order to ensure the proper functioning of the head of the burner 2, by supplying 3 to 10% of stoichiometric oxygen necessary for combustion, the rest being supplied by gas 27 to heating, also allows to cool said sheath 6 placed transversely in the duct 1 and receiving gas 27 which can be at over 500 ° C.

La surface de la section utile de passage du gaz 27 à l'intérieur dudit cylindre 12 est égal à 20 à 50 % de la surface de section utile du conduit 1 dans lequel est situé ledit brûleur, ledit pourcentage étant en fait à considérer en proportion de gaz en air stoechiométrique.The surface of the useful gas passage section 27 inside of said cylinder 12 is equal to 20 to 50% of the useful cross-sectional area of the duct 1 in which said burner is located, said percentage being in fact to be considered in proportion to gas in stoichiometric air.

Suivant le mode de réalisation représenté sur les figures 2 ou 3, ladite tête de brûleur 2 comprend des pales 15 de mise en rotation du gaz, fixés autour de la virole 161 de sortie d'air 16 à l'extrémité du fourreau 6, et des lances d'injection 17 de combustible gazeux disposées à travers et entre lesdites pales 15 suivant des axes parallèles à celui du conduit 1, ou convergents ou divergents.According to the embodiment shown in FIGS. 2 or 3, said burner head 2 comprises blades 15 for rotating the gas, fixed around the ferrule 16 1 for air outlet 16 at the end of the sleeve 6, and injection nozzles 17 for gaseous fuel disposed through and between said blades 15 along axes parallel to that of the duct 1, or convergent or divergent.

Lesdites pales 15 inclinées peuvent être entourées d'un cerclage cylindrique 28 délimitant une couronne périphérique 31 avec le cylindre extérieur 12. Ce dit cylindre extérieur 12 est un directeur d'air qui peut être éventuellement convergent et divergent respectivement à son orifice amont 121 et son orifice aval 122. Lesdites lances d'injection 17 de combustibles gazeux traversant lesdites ailettes inclinées 15 injectent le gaz en aval du plan de la face avant de la plaque stabilisatrice 13. L'ensemble constitué par lesdites pales inclinées 15, formant une rosace, constituent avec ladite plaque stabilisatrice 13 l'accrocheur de flammes comme décrit dans le brevet cité précédemment FR 2570473.Said inclined blades 15 may be surrounded by a cylindrical hoop 28 delimiting a peripheral ring 31 with the outer cylinder 12. This said outer cylinder 12 is an air director which can be possibly convergent and diverge respectively at its upstream orifice 12 1 and its downstream orifice 12 2 . Said injection lances 17 of gaseous fuels passing through said inclined fins 15 inject the gas downstream from the plane of the front face of the stabilizing plate 13. The assembly constituted by said inclined blades 15, forming a rosette, constitute with said stabilizing plate 13 the flame catcher as described in the previously cited patent FR 2570473.

Lesdites lances à combustibles gazeux 17 peuvent être en nombre quelconque représentées ici en nombre de 6 et viennent se raccorder sur au moins un collecteur 18 de gaz, qui peut être de forme torique de révolution telle que représenté sur la figure 3 et constitué ainsi d'ouvertures amont convergentes dudit cylindre 12 ; ledit collecteur 18 est relié à l'extérieur par un tube 19 d'alimentation de gaz combustible.Said gas fuel lances 17 may be in number any represented here in number of 6 and come to be connected on at least one gas manifold 18, which can be toroidal in shape revolution as shown in Figure 3 and thus constituted upstream converging openings of said cylinder 12; said collector 18 is connected to the outside by a fuel gas supply tube 19.

De préférence comme représenté sur les figures, l'axe YY' du fourreau 6 est disposé perpendiculairement à l'axe XX' du brûleur et du conduit 1 mais il pourrait être incliné suivant tout autre angle transversal, de préférence compris entre 45 et 90 ° par rapport à l'axe dudit conduit.Preferably as shown in the figures, the axis YY 'of the sleeve 6 is arranged perpendicular to the axis XX 'of the burner and the duct 1 but it could be tilted at any other angle transverse, preferably between 45 and 90 ° relative to the axis of said conduit.

Suivant la représentation des figures 3 et 4 le dispositif suivant l'invention comporte également au moins deux volets 24 disposés de part et d'autre de la tête 2 du brûleur, basculant autour d'axes 25 transversaux par rapport à celui dudit conduit 1 et dont les formes, compatibles avec celle intérieur du conduit 1 et celle extérieur de la tête 2 du brûleur, assurent en position fermée la réduction de la section de passage du gaz à travers au moins celle de la tête 1 du brûleur.According to the representation of Figures 3 and 4 the following device the invention also comprises at least two flaps 24 arranged on either side of the burner head 2, tilting around axes 25 transverse to that of said conduit 1 and whose shapes, compatible with that inside the duct 1 and that outside the head 2 of the burner, ensure in the closed position the reduction of the section of passage of the gas through at least that of the head 1 of the burner.

De préférence lesdits volets 24 et leurs axes 25 sont creux et reliés à un conduit vertical 26 également creux ; l'ensemble de ces parties creuses internes pouvant être également reliées au poteau creux vertical 20 support des têtes de brûleurs 2.Preferably said flaps 24 and their axes 25 are hollow and connected to a vertical pipe 26 also hollow; all of these parts internal hollow which can also be connected to the hollow post vertical 20 support for the burner heads 2.

Ces moyens de circulation d'air frais interne évite une détérioration par surchauffe des différentes pièces constituant le dispositif telle que la canne d'injection 3 mobile, extractible avec ces différents éléments de manoeuvre, grâce à l'air frais passant par le fourreau 6, de même le poteau vertical creux support 20 desdites têtes de brûleurs et l'ensemble des volets mobiles 24.These internal fresh air circulation means avoid deterioration by overheating of the various parts constituting the device such as the mobile injection rod 3, extractable with these different operating elements, thanks to the fresh air passing through the sheath 6, likewise the hollow vertical post supporting 20 of said heads burners and all the movable flaps 24.

Claims (10)

Dispositif de montage de brûleurs à l'intérieur d'un conduit (1) de gaz et comprenant au moins une canne d'injection (3) de combustible dont le nez (5) est disposé dans la tête (2) dudit brûleur suivant un axe (XX') parallèle à celui dudit conduit (1), caractérisé en ce que ladite canne d'injection (3) est située à l'intérieur d'un fourreau (6) d'alimentation, en air extérieur au conduit (1), de la tête (2) du brûleur dont il est solidaire, et disposé transversalement par rapport à l'axe dudit conduit (1), et ledit nez (5) de la canne (3), situé à l'extrémité d'une partie coudée (4) de celle-ci, est mobile suivant l'axe (XX') par rapport à un orifice (14) de guidage solidaire de ladite tête (2) de brûleur, dont il est apte à être dégagé par déplacement, depuis l'extérieur du conduit (1) et à l'intérieur du fourreau (6), de la canne d'injection (3), qui est alors complètement extractible vers et depuis l'extérieur du conduit (1).Device for mounting burners inside a duct (1) of gas and comprising at least one injection pipe (3) of fuel whose nose (5) is disposed in the head (2) of said burner along an axis (XX ') parallel to that of said conduit (1), characterized in that that said injection rod (3) is located inside a sheath (6) supply of air outside the duct (1) to the burner head (2) of which it is integral, and arranged transversely with respect to the axis said conduit (1), and said nose (5) of the rod (3), located at the end of a bent part (4) thereof, is movable along the axis (XX ') by relative to a guide hole (14) integral with said head (2) of burner, from which it is capable of being disengaged by displacement, from outside the duct (1) and inside the sheath (6), the cane injection (3), which is then completely extractable to and from the outside of the duct (1). Dispositif de montage de brûleurs suivant la revendication 1, caractérisé en ce que ladite canne d'injection (3) est associée à un arbre tournant (8) de manoeuvre depuis l'extérieur du conduit (1), parallèle à la canne (3) et portant au moins à son extrémité distale un engrenage (92) qui vient coopérer avec une crémaillère (10) située à l'extrémité (16) du fourreau (6) du coté de la tête (2) du brûleur, la rotation dudit engrenage (9) par l'arbre de manoeuvre (8) entraínant son déplacement et celui de la canne d'injection (3) le long de la crémaillère (10) pour engager et dégager le nez (5) de la canne (3) par rapport à la tête (2) du brûleur.Burner mounting device according to claim 1, characterized in that said injection pipe (3) is associated with a rotating shaft (8) operating from outside the duct (1), parallel to the pipe (3) and carrying at least at its distal end a gear (9 2 ) which comes to cooperate with a rack (10) located at the end (16) of the sleeve (6) on the side of the head (2) of the burner, the rotation of said gear (9) by the operating shaft (8) causing its movement and that of the injection rod (3) along the rack (10) to engage and disengage the nose (5) of the rod (3) relative to the burner head (2). Dispositif de montage de brûleurs suivant l'une quelconque des revendications 1 ou 2, caractérisé en ce que l'ensemble de la tête (2) du brûleur et du fourreau (6) d'alimentation en air extérieur sont extractibles transversalement et hors du conduit (1) depuis l'extérieur de celui-ci.Burner mounting device according to any one claims 1 or 2, characterized in that the entire head (2) of the burner and the outside air supply sleeve (6) are extractable transversely and out of the duct (1) from the outside of it. Dispositif suivant la revendication 3, caractérisé en ce qu'il comporte au moins un poteau (20) vertical creux disposé dans ledit conduit (1), suspendu à sa partie supérieure (201) et supportant des chemins de roulement (22) horizontaux sur lesquels sont posés des moyens (23) d'appui et de guidage de ladite tête (2) du brûleur.Device according to claim 3, characterized in that it comprises at least one hollow vertical post (20) disposed in said conduit (1), suspended from its upper part (20 1 ) and supporting horizontal raceways (22) on which are placed means (23) for supporting and guiding said head (2) of the burner. Dispositif suivant l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il comporte au moins deux volets (24) disposés de part et d'autre de la tête (2) du brûleur, basculant autour d'axes (25) transversaux audit conduit (1) et dont les formes, compatibles avec celle intérieure du conduit (1) et celle extérieure de la tête (2) du brûleur, assurent en position fermée la réduction de la section de passage du gaz à travers au moins celle de la tête (1) du brûleur.Device according to any one of Claims 1 to 4, characterized in that it comprises at least two flaps (24) arranged on either side of the burner head (2), tilting around axes (25) transverse to said conduit (1) and whose shapes, compatible with that inside of the duct (1) and outside of the burner head (2), ensure in closed position the reduction of the gas passage section through at least that of the burner head (1). Dispositif suivant la revendication 5, caractérisé en ce que lesdits volets (24) et leurs axes (25) sont creux et reliés à un conduit vertical (26) également creux.Device according to claim 5, characterized in that said flaps (24) and their axes (25) are hollow and connected to a conduit vertical (26) also hollow. Dispositif de montage de brûleurs suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que ladite tête brûleur (2) comprend un obturateur (16) de l'extrémité du fourreau (6) s'ouvrant latéralement suivant l'axe (XX') dans une virole (161) fermée elle-même par une plaque stabilisatrice (13) comportant des orifices de sortie d'air et ledit orifice (14) de guidage du nez d'injection (5), et un cylindre externe (12) entourant au moins ladite virole (161) et la plaque stabilisatrice (13).Burner mounting device according to any one of claims 1 to 6, characterized in that said burner head (2) comprises a shutter (16) at the end of the sleeve (6) opening laterally along the axis ( XX ') in a ferrule (16 1 ) closed itself by a stabilizing plate (13) comprising air outlet orifices and said orifice (14) for guiding the injection nose (5), and an external cylinder (12) surrounding at least said ferrule (16 1 ) and the stabilizing plate (13). Dispositif suivant la revendication 7, caractérisé en ce que la surface de la section utile de passage de gaz à l'intérieur dudit cylindre externe (12) est égal à 20 à 50 % de la surface de section utile du conduit (1) dans lequel est situé ledit brûleur.Device according to claim 7, characterized in that the area of the useful gas passage section inside said gas external cylinder (12) is equal to 20 to 50% of the useful cross-sectional area of the duct (1) in which said burner is located. Dispositif suivant l'une quelconque des revendications 7 à 8, caractérisé en ce que ladite tête de brûleur (2) comprend des pales (15) de mise en rotation du gaz, fixées autour de la virole (161) et de sortie d'air à l'extrémité du fourreau (6), et des lances d'injection (17) de combustible gazeux disposées à travers et entre lesdites pales (15).Device according to any one of claims 7 to 8, characterized in that said burner head (2) comprises blades (15) for rotating the gas, fixed around the ferrule (16 1 ) and outlet from air at the end of the sheath (6), and injection lances (17) of gaseous fuel arranged through and between said blades (15). Dispositif de montage de brûleurs suivant l'une quelconque des revendications 1 à 9, caractérisé en ce que le fourreau (6) est disposé perpendiculairement à l'axe du conduit (1).Burner mounting device according to any one claims 1 to 9, characterized in that the sheath (6) is arranged perpendicular to the axis of the duct (1).
EP98430005A 1997-02-27 1998-02-20 Device for mounting a burner in a gas duct Expired - Lifetime EP0862018B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9702586A FR2760071B1 (en) 1997-02-27 1997-02-27 DEVICE FOR MOUNTING BURNERS IN A GAS DUCT FOR HEATING
FR9702586 1997-02-27

Publications (2)

Publication Number Publication Date
EP0862018A1 true EP0862018A1 (en) 1998-09-02
EP0862018B1 EP0862018B1 (en) 2000-11-29

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EP98430005A Expired - Lifetime EP0862018B1 (en) 1997-02-27 1998-02-20 Device for mounting a burner in a gas duct

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US (1) US5984666A (en)
EP (1) EP0862018B1 (en)
KR (1) KR100360521B1 (en)
AT (1) ATE197843T1 (en)
DE (1) DE69800407T2 (en)
ES (1) ES2152741T3 (en)
FR (1) FR2760071B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2797321B1 (en) * 1999-08-04 2001-10-26 Pillard Chauffage LOW-EMISSION NITROGEN OXIDE SMOKE RECIRCULATION BURNERS AND GAS HEATERS COMPRISING SUCH BURNERS
EP2706232A4 (en) * 2011-05-06 2015-07-22 Xiangtan Liyuan Electric Tooling Co Ltd APPARATUS FOR HEATING A WORKING FLUID OF A GAS TURBINE SOLAR ENERGY GENERATION SYSTEM

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FR2285574A1 (en) * 1974-09-20 1976-04-16 Zink Co John BURNER FOR MOUNTING IN EXHAUST GAS PIPES
FR2570473A1 (en) * 1984-09-19 1986-03-21 Pillard Chauffage Improvements to gas boilers with parallel flow comprising a rose and a flame retention baffle (hub) relating to gas boilers and independent supply of combustion air

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Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861859A (en) * 1972-07-31 1975-01-21 Sherwood William L Cooling of rotary furnace shell burner pipes and method
FR2285574A1 (en) * 1974-09-20 1976-04-16 Zink Co John BURNER FOR MOUNTING IN EXHAUST GAS PIPES
FR2570473A1 (en) * 1984-09-19 1986-03-21 Pillard Chauffage Improvements to gas boilers with parallel flow comprising a rose and a flame retention baffle (hub) relating to gas boilers and independent supply of combustion air

Also Published As

Publication number Publication date
US5984666A (en) 1999-11-16
FR2760071B1 (en) 1999-05-28
EP0862018B1 (en) 2000-11-29
ATE197843T1 (en) 2000-12-15
KR100360521B1 (en) 2003-02-25
DE69800407T2 (en) 2001-05-23
KR19980071837A (en) 1998-10-26
DE69800407D1 (en) 2001-01-04
FR2760071A1 (en) 1998-08-28
ES2152741T3 (en) 2001-02-01

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