EP0558455B1 - Brûleur, notamment brûleur à huile ou brûleur combiné huile/gaz - Google Patents

Brûleur, notamment brûleur à huile ou brûleur combiné huile/gaz Download PDF

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Publication number
EP0558455B1
EP0558455B1 EP93810115A EP93810115A EP0558455B1 EP 0558455 B1 EP0558455 B1 EP 0558455B1 EP 93810115 A EP93810115 A EP 93810115A EP 93810115 A EP93810115 A EP 93810115A EP 0558455 B1 EP0558455 B1 EP 0558455B1
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EP
European Patent Office
Prior art keywords
burner according
burner
air
deflection device
recirculation
Prior art date
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Expired - Lifetime
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EP93810115A
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German (de)
English (en)
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EP0558455A1 (fr
Inventor
Jörg Füllemann
Heinrich Boner
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Fuellemann Patent AG
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Fuellemann Patent AG
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Publication of EP0558455A1 publication Critical patent/EP0558455A1/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/006—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber the recirculation taking place in the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/005—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space with combinations of different spraying or vaporising means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/40—Mixing tubes or chambers; Burner heads

Definitions

  • the invention relates to a burner for the combustion of liquid fuels in the gaseous state, with a fuel supply, an air inlet and a deflection device which is arranged at a distance from the air inlet and which has one or more openings.
  • DE-A-1 951 752 describes a burner in which a mixture distributor body is arranged at a distance from the fuel nozzle.
  • the purpose of the mixture distributor body is to ensure that the liquid fuel, which has not yet been mixed with combustion air, is broken up by the surface of the distributor body and thereby offers the combustion air a larger surface.
  • the mixture distributor body should also act as a flame stabilizer. It is then mentioned that a complete gasification, ie a blue flame without soot formation, cannot be achieved with the previous mixture distribution bodies. A blue flame can be achieved with recirculation burners, but burners of this type are relatively complex and expensive and can only be used to a limited extent for central heating systems, since they should also work perfectly on different combustion chambers.
  • the mixture distributor body proposed by DE-A-1 951 752 has a diameter of 45 mm and has holes of 8 mm at a distance from center to center of 12 mm distributed over the entire surface. The air jet flows through these holes, as long as it does not appear on the mixture distributor body. Through the holes, the heat generated by the flame held on the mixture distributor body is passed on to the front part of the mixture distributor body, on which the partially gasified oil-air mixture impinges, because the webs remaining between the holes have a sufficiently large cross section to enable an even heat distribution or an even heat flow. This burner obviously did not meet expectations. As later in the DE-A-28 33 686 describes instability and coke build-up, which manifested themselves in the increase in noise level and pollutant emissions.
  • a mixture distributor body is provided in combination with a switching device.
  • the combustion air is directed as a hollow jet into the outer area of the mixture distributor body during start-up, whereupon a switchover takes place, so that during continuous operation the combustion air is fed as a tightly bundled full jet to the inner area of the mixture distributor body.
  • DE-A-28 33 686 discloses two different embodiments of the mixture distributor body, the first embodiment, namely the hemispherical one, being noted that in continuous operation it works the same way as the known blue burner according to DE-A-19 51 752, which is due to its poor start-up behavior and because of the coke approach could not prevail in practice.
  • the second embodiment of the mixture distributor body has a plurality of frustoconical rings arranged one behind the other, the inside diameter of the ring following downstream in each case being smaller than or equal to the outside diameter of the ring connected upstream.
  • a concentrated air jet flows tangentially around the mixture distributor body and induces strong backflows of hot combustion gases at the circular slots between the rings, which flow through and gasify the fuel sliding off the rings.
  • a relatively small part of the fuel impinging on the mixture distributor body flows together with a very small part of the combustion air through the openings in the cover into the interior of the mixture distributor body, where small yellow flames then arise, in continuous operation.
  • combustion gases are also sucked out of the combustion chamber of the boiler and flow along the mixture distributor body and heat up its surface.
  • the recirculated combustion gases are more or less hot, so that there is not always enough heat of vaporization available.
  • this type of recirculation there is also no intensive mixing with the fuel. For all these reasons, the burner cannot function properly, as has already been described in the previously mentioned literature as a disadvantage of the recirculation burner.
  • Another disadvantage of the burner according to DE 28 33 686 is that it generates a relatively large amount of thermal NOX. Because of the Coanda effect, the flow of the air-fuel mixture follows the outer wall of the mixture distributor body, which runs towards the end parallel or at an acute angle to its axis, and leaves it in a practically axial direction. The result is an elongated or, as the arrows in the drawing show, a hot flame narrowing towards the axis, which favors the formation of NOX.
  • a hollow conical or hemispherical burner bowl made of porous ceramic material is arranged within a porous ceramic combustion chamber at a distance from the fuel nozzle.
  • the yellow that appear in the cavity of the mixture distributor body or the burner bowl are particularly disadvantageous or blue flames, which are necessary to supply the heat necessary for the vaporization of fuel. These flames create a very high temperature in the narrowness of the cavity, which contributes significantly to the impermissibly high NOX production of this type of burner.
  • EP-A-0 346 284 describes a recirculation burner in which a gasification chamber and then a mixing head of a deflection device are arranged downstream of the fuel nozzle.
  • the deflection device effects a current deflection in an approximately radial direction.
  • the burner of EP-A-0 346 284 involves the evaporation of the fuel and the mixture of the (vaporized) fuel with air in separate stages.
  • the fuel is first evaporated in a gasification chamber heated by hot recirculation gases, whereupon a mixture of air and gasified fuel is generated in the mixing head.
  • This mixture can leave the mixing head through a large number of slot-shaped outlet openings.
  • the carburetor and mixing head are enclosed by a flame tube that extends approximately to the end of the deflection device and also serves to form a recirculation path to the carburetor chamber. Since, in contrast to the prior art described above, this deflection device does not serve as a carburetor, it is not heated and it is also initially not clear why it should be heated.
  • a gasification chamber for practically complete gasification of the fuel supplied is arranged between the fuel supply and the deflection device, that the deflection device only has openings for recirculation of hot combustion gases, that a flame tube is provided, which extends approximately to the end of the deflection device, whereby a recirculation path for hot combustion gases is formed in the gasification chamber, and that the deflection device is designed such that the air / gas mixture is deflected in an approximately radial direction to the end of the flame tube .
  • the flame formed in this burner has a flame root with an annular cross section, which is held stable on the inside by the deflection device and on the outside by the flame tube.
  • the reasons for the high flame stability, in contrast to the state of the art, have not yet been clarified with certainty.
  • the good gasification of the fuel before mixing with air certainly plays a role in the formation of a homogeneous mixture.
  • the precise geometric limitation of the cross-section of the flame root should also play a part in this.
  • the deflection device deflects the air / gas mixture in an approximately radial direction towards the end of the flame tube, a flame is produced which expands strongly in the radial direction. This results in a relatively low flame temperature at which the formation of nitrogen oxides is very low.
  • the deflection of the flame in the radial direction is further promoted by the suction which is effective at the flame root due to the recirculation path formed by the flame tube. Since the recirculation path is limited by the flame tube, hot combustion gases are led directly from the flame root to the combustion chamber, where they cause good gasification of the fuel before it reaches the deflection device in gaseous state. It is particularly advantageous that this recirculation is practically independent of the dimensions of the combustion chamber of the boiler.
  • the burner according to the invention proves to be quiet in operation, is very easy to service and has a large control range, about 40 percent, without the need for special mechanics.
  • the deflection device advantageously has the shape of a hollow cone, the tip of which is directed towards the outlet of the carburetor. This shape enables the deflection device to be manufactured easily and ensures good flow behavior. However, other shapes are also possible.
  • the deflection device could have the shape of a hollow spherical segment or a similar shape, the curvature being directed toward the gasification space.
  • the deflection device consists of at least two sections, two sections in each case to form the recirculation opening Are spaced from each other.
  • the respective recirculation opening is ring-shaped.
  • the deflection device With this design of the deflection device, high flame stability can be achieved.
  • the deflection device can have a number of fingers extending in a star shape approximately radially outwards.
  • the flame that forms is held and stabilized by these fingers.
  • a number of radially inwardly extending fingers can also be provided at the end of the flame tube.
  • An air screen with a preferably circular opening for supplying air into the gasification chamber is advantageously provided.
  • the air screen can be designed to generate a swirl in the air flow.
  • the flow in the gasification chamber is then approximately helical. This results in a particularly good swirling of air, hot gases and fuel. This in turn promotes gasification of the fuel droplets.
  • an electric heater is expediently arranged on the carburetor.
  • the carburetor is then heated up before the fuel supply is switched on. This avoids that unburned hydrocarbons are released to an unacceptable extent at the start of the heating process.
  • ignition can also take place without prior heating and that the carburetor is heated up by the recirculation in a short time, so that electrical heating can be dispensed with if necessary. Thanks to the recirculation of the deflection device, it is also heated up quickly, so that there is no risk of coking, even if there is no electrical one Heating is provided for preheating before switching on the fuel supply.
  • the deflection device, air panel and optionally carburetor and electric heater form a structural unit. Such a unit can be easily replaced during service work.
  • the flame tube is advantageously arranged coaxially with the carburetor. This results in a particularly expedient construction in which the recirculated hot combustion gases heat the carburetor evenly.
  • the air screen is advantageously arranged at a distance from the carburetor, the gap between the air screen and the carburetor forming a recirculation inlet. Thanks to this arrangement, it is primarily the hot recirculating gases that run along the inner wall of the carburetor, while the cold air flows more inside the carburetor. This ensures good evaporation of the fuel and prevents the fuel from re-evaporating after the burner has come to a standstill. When the burner is switched off, the carburetor is still so hot that the remaining fuel will evaporate shortly and be burned with the air that is still being pumped until the burner comes to a standstill.
  • An ignition electrode is advantageously arranged in the gasification chamber or at the inlet into the carburetor. This enables the burner to ignite gently. The ignition shock is thus almost completely prevented.
  • the burner shown schematically in FIG. 1 has a motor 8 which serves to drive the fan 9 and the fuel pump 10.
  • the fuel line 11 leads to the atomizer nozzle 13.
  • a plurality of atomizer nozzles 13, which can act individually or in combination, can also be provided.
  • the pipe 15 serves to supply air to the burner head 16.
  • the burner can be fastened to the boiler 20 by means of the flange 19.
  • the burner head 16 forms an easily replaceable structural unit, which essentially consists of the carburetor 17, the deflection device 31, the air screen 35, the electric heater 39 and, if appropriate, other parts.
  • the assembly 16 is enclosed by the flame tube 21. This is relatively short. It therefore only extends to approximately the end of the deflection device 31.
  • the space 40 between the carburetor 17 and the flame tube 21 forms a recirculation path for hot combustion gases to the inlet 41.
  • the carburetor 17 consists of a round piece of pipe and is, for example, with three feet 47 on the air screen 35 fixed by spot welding, rivets or the like. Recirculation passages 49 arise through the spaces between the feet 47.
  • the structural unit 16 is fastened to the tube 15, for example with screws.
  • a sealing ring 53 made of heat-resistant material ensures a practically airtight seal. This ensures that the air required for combustion can only flow through the air screen 35.
  • the air orifice 35 advantageously has a central circular opening 55 for supplying air to the gasification chamber 66. This opening 55 is dimensioned such that the air velocity of the air flowing through it for functioning of the burner is optimal.
  • FIGS. 10 and 11 show, in addition to the central opening 55, a large number of smaller openings 50 can also be provided, preferably coaxially therewith.
  • a rotatable disk 36 with openings 55 ′, 50 ′ that are practically congruent can also be provided coaxially with the air screen 35. By rotating the disk 36, the air flow through the openings 50 of the air screen can then be throttled or completely switched off.
  • the deflection device 31 is fastened, for example, to the carburetor 17 with three feet 32.
  • the deflection device 31 has approximately the shape of an obtuse-angled hollow cone, the tip of which confronts the outlet 42 of the carburetor 17, i.e. is directed against the gasification chamber 66.
  • the deflection device could also e.g. have a plate-like shape or an arched shape.
  • the deflection device 31 expediently has at least two sections 54, 56 which are arranged at a distance from one another in order to form an annular recirculation opening 57.
  • the deflection device 31 consists of a e.g. conical sheet metal piece, which has a plurality of dormer-shaped beads 62, which form recirculation openings 57 '.
  • Such a deflection device 31 is particularly cheap to manufacture.
  • the ignition electrode 65 projects into the gasification chamber 66.
  • the burner works as follows: When starting, the heater 39 first turns the electric heater 39 on for about switched on for two minutes. During this time, the carburetor 17 is heated to about 550 degrees Celsius. After this preheating time, the burner motor 8 is started, which drives the fan 9 for the combustion air supply and the pump 10 for the fuel supply. The oil delivered by the pump 10 is sprayed through the nozzle 13 into the carburetor 17 and wets the carburetor walls there. Thanks to the high temperature of the carburetor, the oil evaporates and is mixed with the air flowing in through opening 55. The ignition takes place through the ignition electrode 65 in the gasification chamber 66. The ignition in the gasification chamber 66 has the advantage that a pressure surge during ignition is largely avoided. So there is a soft start. The ignition is also fairly quick because when the carburettor 17 starts, the temperatures are higher than at the outlet. A blue flame is formed at the annular gap 67 between the deflection device 31 and the flame tube 21, which flame is relatively short but expands radially.
  • hot combustion gases are recirculated in two or possibly three different ways.
  • a first recirculation path leads from the flame root at the outlet 67 through the annular space 40 between the carburetor 17 and the flame tube 21 to the recirculation inlet 49 and thereby heats the carburetor 17.
  • the electric heater 39 can therefore be switched off.
  • the returned hot gases flow from the inlet 41 to the outlet 42 of the carburetor 17 again, favor the gasification and mix on the one hand with gasified fuel and on the other hand with fresh air flowing in. After a short start-up phase, practically all of the fuel droplets in the gasification chamber 66 evaporate without ever touching any components.
  • the second recirculation path which runs from the annular gap 67 into the deflection device 31 and through the recirculation opening 57. 61 leads back to the flame root at 67.
  • the deflection device 31 is heated by the hot gases in this recirculation path. As a result, coking of the deflection device 31 is avoided and a particularly stable flame is also achieved, which practically prevents the formation of CO. It has also been shown that the NOX formation is further reduced to a very low value compared to the prior art.
  • a third recirculation path can optionally take place outside the flame tube 21 from its front end to the rear end if corresponding openings 72 are provided there (FIGS. 7 to 9).
  • FIGS. 5 and 6 differs from that of FIG. 2 in particular in that the plate 58 has a number of fingers 60 which extend outward in a star shape.
  • the fingers 60 are advantageously curved in an arc. The flame is held and stabilized well by these fingers 60. This training is particularly suitable for a burner in the power range above 20 to 20,000 kilowatts.
  • Fingers 64 can also be formed on an inwardly projecting flange 66 'of the flame tube 21 (FIG. 6a) in order to hold the flame better.
  • FIG. 5 also shows that it is possible to form the flame tube 21 by means of a tube which can be used in the boiler 20.
  • the tube has spacers 75. Since the design of the burner is otherwise the same as in the exemplary embodiment in FIG. 2, reference may be made to the preceding description in this regard.
  • the exemplary embodiment according to FIG. 7 differs from that of FIGS. 5 and 6 only by the further recirculation path 72 outside the flame tube 21.
  • the embodiment according to FIG. 8 has a device 70 with wings 71 in front of the air screen 35 in order to convert the air into a helical shape before it passes through the opening 55 To move the circulation, as indicated by arrows.
  • This circulation results in particularly good gasification of the fuel in the gasification chamber 66.
  • the burner of FIG. 9 represents a simplified version of the burner according to FIGS. 2 and 3.
  • the tubular carburetor with the electric heater is missing. Again, however, there is a deflection device 31. This is attached to the air panel 35, for example, with three feet 32.
  • the deflection device can in turn be designed as previously described with reference to FIGS. 2 or 4.
  • the air diaphragm 35 is designed such that an approximately helical circulation is created in the gasification chamber 66.
  • the air diaphragm 35 has wings 71 which extend radially outward from the opening 55 and which give the air flowing into the gasification chamber 66 a swirl, as is indicated by arrows.
  • Air shutters 35 of this type are already known in the conventional atomizer burners.
  • This burner works as follows: When the burner is started, it is started to deliver the necessary combustion air.
  • the oil delivered by the pump is sprayed through the nozzle 13 into the gasification chamber 66. Ignition takes place through the ignition electrode (not shown, but see Fig. 2).
  • a flame is formed at the annular gap 67 between the deflection device 31 and the flame tube 21, which flame is relatively short but expands radially.
  • the flame has formed, thanks to the temperatures prevailing in the gasification chamber 66, practically all fuel droplets are gasified safely before they can touch any components.
  • Three processes are of particular importance, namely the braking effect by the deflection device 31, the recirculation of the hot gases and the air vortices in the gasification chamber 66.
  • Air vortices and recirculation paths are shown schematically in Fig. 9 with arrows.
  • a first recirculation path leads from the outlet 67 along the inner wall of the flame tube 21 into the vicinity of the air screen 35, where the hot gases mix with the inflowing air and cause the sprayed fuel to evaporate in the gasification chamber 66.
  • a second recirculation path leads from the annular gap 67 through the deflection device 31 into the gasification chamber 66.
  • a third recirculation path leads outside the flame tube 21 to the openings 72 in the gasification chamber 66 and also contributes to the evaporation of the fuel droplets sprayed into the gasification chamber 66.
  • the dual-fuel burner shown in FIG. 12 can optionally be operated with liquid or gaseous fuel.
  • This burner basically has the same structure as the oil burner, which was described with reference to FIGS. 2 and 3. The same reference numerals are therefore used, and reference can also be made to the preceding description.
  • a gas supply pipe 77 for gaseous fuel is provided in addition to the atomizing nozzle 13 for liquid fuel.
  • the arrangement of the mouth 79 is chosen such that the pressure of the air conveyed by the blower can practically not act on the gas pressure, which would have a negative effect on the control characteristic.
  • the distance between the mouth 79 in front of the air diaphragm 35 is advantageously five to twenty millimeters.
  • a diffuser 81 can also be provided at the mouth 75.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fats And Perfumes (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)

Claims (24)

  1. Brûleur, en particulier brûleur à mazout ou brûleur combiné mazout/gaz, pour la combustion de combustibles liquides à l'état gazeux, comportant une alimentation en combustible (11,13), une arrivée d'air (55) et un dispositif de déviation (31) qui est disposé à distance de l'arrivée d'air (55) et qui comporte une ou plusieurs ouvertures pour la recirculation de gaz de combustion chauds, caractérisé en ce qu'il est disposé, entre l'alimentation en combustible (11,13) et le dispositif de déviation (31), une chambre de gazéification (66) pour la gazéification pratiquement complète du combustible introduit, en ce qu'il est prévu un tube-foyer (21) qui s'étend à peu près jusqu'à l'extrémité du dispositif de déviation (31), et en ce que le dispositif de déviation (31) est réalisé de sorte que le mélange air/gaz soit dévié en direction approximativement radiale jusqu'à l'extrémité du tube-foyer (21), d'où il résulte qu'il est formé un trajet de recirculation pour les gaz de combustion chauds dans la chambre de gazéification (66).
  2. Brûleur selon la revendication 1, caractérisé en ce que le dispositif de déviation (31) présente à peu près la forme d'un cône creux dont la pointe est dirigée vers la chambre de gazéification (66).
  3. Brûleur selon la revendication 1, caractérisé en ce que le dispositif de déviation (31) présente à peu près la forme d'une assiette ou une forme analogue, dont le bombement convexe est dirigé vers la chambre de gazéification (66).
  4. Brûleur selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le dispositif de déviation (31) se compose d'au moins deux parties (54,56,58) qui sont disposées à distance l'une de l'autre pour la formation des ouvertures de recirculation (57,59,61).
  5. Brûleur selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le dispositif de déviation (31) présente une multiplicité d'ouvertures de recirculation (57').
  6. Brûleur selon la revendication 5, caractérisé en ce que les ouvertures de recirculation sont formées par des moulures (57'), par exemple des moulures en forme de lucarne de toit.
  7. Brûleur selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'arrivée d'air (55,71) est réalisée avec une forme telle qu'il en résulte, dans la chambre de gazéification (66), un écoulement à peu près hélicoïdal.
  8. Brûleur selon la revendication 7, caractérisé en ce que l'arrivée d'air présente un certain nombre d'ailettes fixes (71).
  9. Brûleur selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le dispositif de déviation (31) comporte une multiplicité de doigts (60) qui s'étendent en étoile vers l'extérieur en direction à peu près radiale.
  10. Brûleur selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le tube-foyer (21) comporte un certain nombre de doigts (64) qui s'étendent vers l'intérieur en direction radiale.
  11. Brûleur selon l'une quelconque des revendications 1 à 10, caractérisé en ce que le tube-foyer (21) est constitué par un tube qui peut être inséré dans la chaudière de chauffage (20).
  12. Brûleur selon l'une quelconque des revendications 1 à 11, caractérisé en ce qu'il est prévu, comme arrivée d'air, un diaphragme à air (35) comportant une ouverture (55), de préférence circulaire, pour l'entrée d'air dans la chambre de gazéification (66).
  13. Brûleur selon l'une quelconque des revendications 1 à 12, caractérisé en ce qu'il est prévu, de préférence coaxialement par rapport à l'arrivée d'air, un gazéificateur (17) de préférence tubulaire, comportant une entrée (41) et une sortie (42).
  14. Brûleur selon la revendication 13, caractérisé en ce qu'un chauffage électrique (39) est disposé sur le gazéificateur (17).
  15. Brûleur selon l'une quelconque des revendications 1 à 14, caractérisé en ce que le dispositif de déviation (31), le diaphragme à air (35) et éventuellement le gazéificateur (17) et son chauffage (39) forment une unité modulaire (16).
  16. Brûleur selon l'une quelconque des revendications 1 à 15, caractérisé en ce que le tube-foyer (21) est disposé coaxialement par rapport au gézéificateur (17).
  17. Brûleur selon l'une quelconque des revendications 1 à 16, caractérisé en ce qu'une buse de pulvérisation (13) est disposée, de préférence coaxialement par rapport au gazéificateur (17), en tant qu'alimentation en combustible.
  18. Brûleur selon l'une quelconque des revendications 12 à 17, caractérisé en ce que l'ouverture (55) est entourée par une multiplicité de plus petites ouvertures.
  19. Brûleur selon la revendication 18, caractérisé en ce qu'il est prévu, auprès du diaphragme à air (35), un disque rotatif pour l'étranglement du courant d'air à travers les plus petites ouvertures (50) du diaphragme à air (35).
  20. Brûleur selon l'une quelconque des revendications 12 à 19, caractérisé en ce que le diaphragme à air (35) est disposé à distance du gazéificateur (17), la fente entre le diaphragme à air (35) et le gazéificateur (17) constituant une entrée de recirculation (49).
  21. Brûleur selon l'une quelconque des revendications 1 à 20, caractérisé en ce qu'une électrode d'amorçage (65) est disposée dans la chambre de gazéification (66).
  22. Brûleur selon l'une quelconque des revendications 1 à 21, caractérisé en ce que l'alimentation en combustible comprend une buse de pulvérisation (13) pour un combustible liquide et un tube d'admission de gaz (77) pour un combustible gazeux.
  23. Brûleur selon la revendication 22, caractérisé en ce que l'orifice du tube d'admission de gaz (77) est disposé à distance de l'ouverture (55) du diaphragme à air (35).
  24. Brûleur selon la revendication 22 ou 23, caractérisé en ce que le tube d'admission de gaz (77) est équipé d'un diffuseur (81).
EP93810115A 1992-02-28 1993-02-22 Brûleur, notamment brûleur à huile ou brûleur combiné huile/gaz Expired - Lifetime EP0558455B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH63692 1992-02-28
CH636/92 1992-02-28

Publications (2)

Publication Number Publication Date
EP0558455A1 EP0558455A1 (fr) 1993-09-01
EP0558455B1 true EP0558455B1 (fr) 1996-09-04

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EP93810115A Expired - Lifetime EP0558455B1 (fr) 1992-02-28 1993-02-22 Brûleur, notamment brûleur à huile ou brûleur combiné huile/gaz

Country Status (8)

Country Link
US (1) US5346391A (fr)
EP (1) EP0558455B1 (fr)
AT (1) ATE142324T1 (fr)
CA (1) CA2090163A1 (fr)
CZ (1) CZ280438B6 (fr)
DE (1) DE59303606D1 (fr)
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DE10327391B3 (de) * 2003-06-18 2004-12-16 Bbt Thermotechnik Gmbh Mischeinrichtung für einen Öl- oder Gasbrenner
CH694972A5 (de) * 2004-10-22 2005-10-14 Toby Ag Vormischender Brenner mit einem zylindrischen Flammenhalter sowie Heizkessel mit einem solchen Brenner.
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Publication number Publication date
US5346391A (en) 1994-09-13
ES2094512T3 (es) 1997-01-16
HU9300515D0 (en) 1993-05-28
CZ280438B6 (cs) 1996-01-17
CA2090163A1 (fr) 1993-08-29
ATE142324T1 (de) 1996-09-15
CZ28993A3 (en) 1993-10-13
DE59303606D1 (de) 1996-10-10
HUT65222A (en) 1994-05-02
EP0558455A1 (fr) 1993-09-01

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