EP1769196A1 - Ensemble de buses de bruleur a echangeurs de chaleur integres - Google Patents

Ensemble de buses de bruleur a echangeurs de chaleur integres

Info

Publication number
EP1769196A1
EP1769196A1 EP05775824A EP05775824A EP1769196A1 EP 1769196 A1 EP1769196 A1 EP 1769196A1 EP 05775824 A EP05775824 A EP 05775824A EP 05775824 A EP05775824 A EP 05775824A EP 1769196 A1 EP1769196 A1 EP 1769196A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
burner
net
array according
characterized gekennzeich
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.)
Withdrawn
Application number
EP05775824A
Other languages
German (de)
English (en)
Inventor
Joachim A. Wünning
Joachim G. Wünning
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.)
WS Warmeprozesstechnik GmbH
Original Assignee
WS Warmeprozesstechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WS Warmeprozesstechnik GmbH filed Critical WS Warmeprozesstechnik GmbH
Publication of EP1769196A1 publication Critical patent/EP1769196A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/56—Nozzles for spreading the flame over an area, e.g. for desurfacing of solid material, for surface hardening, or for heating workpieces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/52—Methods of heating with flames
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/63—Continuous furnaces for strip or wire the strip being supported by a cushion of gas
    • 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
    • F23C5/08—Disposition of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D23/00—Assemblies of two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D91/00—Burners specially adapted for specific applications, not otherwise provided for
    • F23D91/02—Burners specially adapted for specific applications, not otherwise provided for for use in particular heating operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/30—Premixing fluegas with combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F27D2099/0053—Burner fed with preheated gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • heated nozzle fields For heating of technical heat, such as steel strips, steel bars, tubes and the like, so-called heated nozzle fields are frequently used in practice. These generate a larger number of impact blasting flames with small lateral distances, ie in narrow pitch. Due to the combination of high convective heat transfer and high temperature during combustion in the nozzle field, heat flux densities of several hundred kilowatts per square meter are achieved, ie considerably more than during radiation heating. This effect is used technically for the swelling of surfaces, in particular in the metal industry but also in other branches of industry.
  • the burner nozzle field according to the invention has a number of nozzle bodies, to each of which an air pre-heating device is assigned individually.
  • the air preheating device can be formed by a regenerator arrangement or else by a recuperator arrangement.
  • the direct individual assignment between the nozzle body and the air preheater means that air preheaters of more than 500 ° C. can be achieved. As a result, not only the efficiency is increased, but also the heat transfer, because the volume flow increases with the air preheating.
  • the nozzle bodies are arranged at a lateral distance zuein ⁇ other, which is less than 200 mm. It is preferably less than 150 mm. Ideally, it does not exceed 100 mm. Due to this narrow division, a high uniformity of the heat transfer is achieved.
  • the nozzle openings of the nozzle body are essentially axially aligned. If a plurality of nozzle openings are present, these define, for example, a slender cone, the exit direction of the nozzle openings of adjacent nozzle bodies being matched to one another in such a way that the points of impact of all the nozzle jets on the thermal material form an equidistant pattern. If a nozzle body has, for example, four nozzle openings, the pitch of the impact points on the heat well is half the pitch defined by the nozzle bodies through their lateral distances.
  • the angle, which includes the exiting jet with the nozzle longitudinal axis is preferably less than 45 °.
  • it bears at most 30 ° (corresponds to a cone angle of 60 °).
  • This can be achieved by distributing the nozzle openings on an approximately cylindrical nozzle body with a rounded end face on a rim. Due to the steep angle of incidence, on the one hand a good heat transfer and on the other hand it is achieved that a uniform flow pattern with large-scale recirculation can form in the available reaction or recirculation space.
  • the large-scale recirculation increases, on the one hand, the mass flow of the hot gas impinging on the thermal material and, on the other hand, makes it possible to form a flameless oxidation. This in turn avoids the occurrence of local temperature peaks and thus counteracts the uniform heating of the cherriesguts.
  • This measure is also the air preheating to temperatures above 500 0 C and the formation of the nozzle body so that at the nozzle opening a fuel jet emits unburned, ie substantially fuel and Air side by side before and have not yet reacted significantly mit ⁇ each other.
  • the heat transfer is mainly caused by the impact of hot gas jets, ie "impact blasting" on the heat material (forced convection) .
  • the high flow velocity of at least 50 m / s, better 100 m / s creates a jet of gas impinging on the heat, which is very high.
  • the heat transfer is higher than it could be caused by radiation at the same burner temperature, and the heat transfer is independent of the reflection properties of the heat, and it almost does not matter if the heat is metallically bright (shiny) or black (eg scale) is.
  • substantially higher burner temperatures would be required with the known disadvantages in terms of NOx production.
  • the nozzle body and the air preheater are preferably to a burner, i. combined into a structural unit, wherein meh ⁇ rere of these burners together form a nozzle array module.
  • the nozzle field module has a common air supply and a common exhaust system, for example a form of an exhaust gas collection box.
  • the burner module is designed such that the burners are at right angles to the air and exhaust gases. extending gas supply away. They can thus be pushed through a corresponding wall provided with openings. By combining the burners into a module, it becomes possible to achieve the desired narrow pitch.
  • the nozzle bodies protrude beyond the combustion chamber wall so that the nozzle openings are at some distance in front of the combustion chamber wall.
  • the nozzle openings of the nozzle bodies are preferably located at a distance of at least 50 mm, preferably at least 100 mm, in front of the combustion chamber wall in order to form the recirculation space.
  • a reaction volume is created between the individual nozzle bodies, which can be occupied by a large-scale recirculation.
  • the residence time of the gases in the combustion chamber can be increased precisely in view of the small distances between the nozzle openings and the thermal material which are intended.
  • These distances are preferably less than 200 mm. In more preferred cases, they are less than 150 mm and, at best, less than 100 mm.
  • the recirculation volume required with such small distances between the nozzle opening and the heat material, which in particular enables flameless oxidation, is created by the projection of the nozzle body beyond the combustion chamber wall.
  • Each nozzle body has at least one, preferably a plurality of nozzle openings whose exit directions define a slender cone. This cone is so slim that the nozzle jets impinge almost perpendicular to the heat.
  • the fuel / air mixture exhaust gas can be added. It is also possible to work with excess air, stoichiometric or substoichiometric. It is also possible to arrange the nozzle field both above and below the heat. In the case of surface heat, for example sheet metal, it is possible to float it on the gas cushion constructed by the nozzle field. In addition, the thermal material can be heated on both sides by corresponding burner nozzle fields.
  • the burner nozzle field according to the invention allows the rapid heating of heat.
  • the individual nozzles are arranged in rows, which are oriented obliquely with respect to the transport direction of the material. This avoids the formation of heat streaks.
  • Figure 1 shows a burner nozzle array with workpiece in one
  • Figure 2 shows the burner nozzle array of Figure 1 in one
  • FIG. 3 shows the burner nozzle field in a rear view
  • FIG. 4 shows the heated workpiece with points of impact of the nozzle jets in a schematized plan view
  • FIG. 5 shows a modified embodiment of the burner nozzle field in a longitudinal section
  • FIGS. 6 and 7 show the burner nozzle field according to FIG. 5 in different cross-sectional views
  • FIG. 8 shows the burner nozzle field according to FIG. 5 in a rear view
  • FIG. 9 illustrates the workpiece with it
  • FIG. 10 shows a nozzle field arrangement for double-sided
  • FIG. 11 shows the arrangement according to FIG. 10 in plan view
  • FIG. 12 shows a burner nozzle field arrangement for heating round workpieces in a cross-sectional view
  • FIG. 13 shows the arrangement of Figure 12 in plan view.
  • FIG. 1 illustrates a burner nozzle field 1 which serves to heat a continuous flat workpiece, for example in the form of a sheet-metal strip 2. This is illustrated separately in FIG.
  • the metal strip 2 is representative of any, with the burner nozzle 1 to be heated heat.
  • the burner nozzle field 1 includes a heat-insulating base body 3 which can also be seen from FIG. 2 and which has a trough-like recess 4 on the side facing the sheet-metal strip 2.
  • the recess 4 limiting surface 5 of the base body 3 forms the combustion chamber wall of a Brennrau ⁇ mes, which is completed by the metal strip 2.
  • the main body 3 is provided with a series of openings 6, 7, 8, 9, 10, through which burners 11, 12, 13, 14, 15 extend. Between the inner wall of the respective opening 6 to 10 and the outer cylindrical shell of each burner 11 to 15, an annular exhaust gas channel 16, 17, 18, 19, 20 is formed. As can be seen from FIG. 2 using the example of the burner 15, the exhaust duct 20 is formed between an outer tube 21 lining the opening 10 and an inner tube 22, in which a further tube 23 is held, forming a concentric annular gap. The latter defines with the inner tube an annular gap-shaped air supply channel, which is connected via a feed line 24 to a corresponding, designed as a closed ring Lucasver ⁇ divider frame 25. The exhaust passage 20 is hin ⁇ against connected to a flue 26.
  • the inner tube 22 forms a recuperator tube, on the Ab ⁇ gas and inside fresh air flow in countercurrent along. At the inlet to the combustion chamber, it narrows and carries there a ceramic nozzle body 27. This end has at least one if necessary but also several, in the present Embodiment four nozzle openings 28, 29, 30, 31 on. In FIGS. 1, 2 and 4, these are marked only by the projections of the respectively emerging burner jets 32, 33, 34, 35. Concentrically, a fuel line 36 leads into the nozzle body 27. The fuel line 36 is, as shown in Figure 3, connected to a corresponding Verteiler ⁇ line 37.
  • the air distributor frame 25 is connected to an air feed fan 38 while the exhaust box 26 may be connected to an exhaust fan 39.
  • each other defined mass flow conditions and thus defined pressure conditions can be set to the semi-open combustion chamber.
  • a line with valve 41 may be provided, for example, to allow an external exhaust gas recirculation.
  • the burners 11 to 15 are arranged at lateral intervals of, for example, only 150 mm relative to the burner longitudinal axes and form a nozzle field module 42 with the air distributor frame 25 and the exhaust box 26.
  • the jet nozzles 32 to 35 and the corresponding jet streams of the adjacent burners 11 to 14 meet at intervals t (see Figure 4) on the sheet metal strip 2, which are smaller than 150 mm, preferably smaller than 100 mm.
  • the jet streams 32 to 35 impinge on the sheet-metal strip 2 at an angle of .60 °.
  • the distance h between the end face of the respective nozzle body 27 and the sheet metal strip see FIG.
  • the burner nozzle array 1 is preferably approximately the same as the distance of the end face of the nozzle body 27 from the part of the combustion chamber wall (surface 5) aligned parallel to the sheet metal strip 2.
  • To the burner nozzle array 1 also includes a Zünd ⁇ burner 43 and a temperature probe 44, which are arranged at suitable locations of the base body 3.
  • the burner nozzle array 1 described so far operates as follows:
  • the nozzle bodies of all burners 11 to 15 are first thermally insulated from the cold workpiece. This can be done by removing the workpiece, by lateral movement of the burner nozzle array 1 or by introducing heat shields 55, 56 (FIG. 10) between the burners 11 to 15.
  • the reaction chamber including the burner 11 to 15 is brought to the desired temperature.
  • the burners 11 to 15 are activated. From the nozzle orifices, the nozzle jets 32 to 35 illustrated on the burner 15 representative of all the burners 11 to 14 emerge, which consist of a fuel / air mixture. They begin to react on the way from the nozzle body 27 to the sheet metal part 2, whereby they heat up. As is indicated in FIGS.
  • FIG. 4 illustrates the spots of incidence, ie the locations at which the burner jets 32 to 35 impinge respectively on the sheet metal strip 2 and from which the recirculation originates.
  • the reaction continues in the part of the gas flow directed away from the metal strip 2, so that hot gas flows from the combustion chamber to the burner jets 32 to 35.
  • the entire recirculation area can be used as a reaction zone.
  • the hot exhaust gases flow through the exhaust channels 16 to 20 and heat the incoming air in countercurrent.
  • the air preheating tion can thereby be more than 500 0 C, resulting in a high Wir ⁇ ciency.
  • the impact points of adjacent burners 11 to 15 are each spaced apart from one another. They form groups of four (e.g., 32 to 35) with centers of gravity at the corners of a square. The groups of four do not overlap one another.
  • FIGS. 5 to 9 The situation is different for the embodiment illustrated in FIGS. 5 to 9 with regenerative burners.
  • these differ by a larger number of regenerative burners IIa, IIb, 12a, 12b, 13a, 13b, 14a, 14b, 15a, 15b.
  • These are arranged at a smaller distance from each other and preferably in the division T. They are correspondingly slender aus ⁇ out and have in their interior a regenerator 45a, 45b, 46a, 46b, 47a, 47b, 48a, 48b, 49a, 49b on.
  • the burners IIa to 15b each have a common connection for air and exhaust gas. This is connected to the Lucasverteiler ⁇ frame 25. The latter is divided into two parts.
  • the half 25a of the air distribution frame 25 is connected to all burners IIa to 15a indicated with a.
  • the half 25b is connected to all burners IIb to 15b indicated with b.
  • the a- and b-indexed burners alternate and are arranged in a straight row.
  • the pattern of the impact spots generated by the Bren ⁇ nerstrahlen is shown in Figure 9. It has a pitch T of preferably ⁇ 150 mm to ⁇ 100 mm.
  • the landing spots of the a-indexed burners overlap or are identical to those of the b-indexed burners.
  • the burners are offset by T / 2 against the pattern of the burner impact spots. This will be with the exception of the respective two upper or lower torch impact spots in FIG. 9, the respective complete pattern of burner impact spots is achieved both with the burners IIa to 15a and with the burners IIb to 15b. They are operated alternately. For example, the switching device 51 switches over every ten seconds. For example, the flow pattern illustrated in FIG. 5 occurs with large-scale recirculation.
  • FIG. 7 illustrates the flow conditions on a currently active burner 15b whose regenerator body 49b gives off heat to the fresh air.
  • FIG. 6 illustrates the just passive burner 15a, which is currently serving the exhaust gas outlet and whose regenerator body 49a is being heated.
  • FIGS. 11 and 12 illustrate an expanded embodiment in which, for example, a horizontally oriented metal strip 2 is heated both from its upper side and from its lower side.
  • corresponding burner nozzle fields Ia, Ib are used which, as described above, are constructed from individual modules.
  • FIG. 11 illustrates the upper burner nozzle field 1 a, which consists of a total of five nozzle field modules 42 a, 42 b, 42 c, 42 d, 42 e arranged next to one another.
  • the lower burner nozzle field Ib is constructed accordingly.
  • the longitudinal axes of the nozzle array groups 42a to 42e are offset with a small acute angle, for example 10 ° or 15 °, against the direction of travel of the sheet-metal strip 2 in order to prevent the formation of heat strips.
  • the metal strip 2 can float on the gas cushion formed by the lower burner nozzle field Ib. This can be achieved in particular by matching the delivery rate of the air feed blower 38 to the delivery rate of the exhaust gas blower 39. With appropriate blower tuning (Luftspeisegebläse slightly stronger than exhaust fan) an air cushion is formed below the metal strip 2, which carries the metal strip 2. Around To avoid escape of gases from the combustion chamber, the air feed fan 38 and the exhaust fan 39 of the upper burner nozzle field Ia can be matched in opposite directions, so that a somewhat larger suction power of the exhaust fan 39 is present here.
  • the basic body 3 designed here as a furnace chamber can have a lateral slot 53 which is provided with a flap 54.
  • the heating device thus formed can be moved laterally away from the Blechstsammlung- 2, when heating of the sheet metal strip 2 is not desirable when the furnace chamber is to be heated or if maintenance work is necessary.
  • the sheet metal strip 2 can be led out laterally out of the inner space without driving the main body 3.
  • heat shields 55, 56 can be moved into the oven chamber, which shield the cold sheet metal strip 2 when the system starts up, that is to say the heat exchanger 55. thermally isolate from the burners. After the burner and the furnace chamber have been heated up, the heat shields 55, 56 are moved out of the open space again.
  • a device according to Fig. 3 has achieved the following data in the test phase:
  • Width length 1.4 m
  • Exit velocity at the nozzle opening > 50 m / s, preferably> 100 m / s
  • FIGS. 12 and 13 illustrate the application of nozzle field modules 42a, 42b, 42c, to which the description given in connection with FIGS. 1 to 4 applies, for heating a long-extended body 52, for example with a circular cross-section.
  • the burners of the nozzle field modules 42 can be aligned radially with respect to the body 52, wherein the individual burners in turn form a row extending approximately in the direction of movement of the body 52.
  • a support means 53 may be arranged to support the body 52.
  • a novel burner nozzle array 1 consists of nozzle array modules 42 which work with high air preheating on the material to be heated generate gas impingement, preferably vor ⁇ preferably less than 150 mm and in the best case less than 100 mm center distance.
  • the burners work with non-ignited gas outlet and individual air preheating.
  • the individual nozzle field modules 42 can operate in arbitrary spatial orientations. Burner nozzle arrays can be arranged behind one another to increase the output.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)

Abstract

L'invention concerne un nouvel ensemble de buses de brûleur, constitué de modules d'ensembles de buses qui fonctionnent avec un préchauffage d'air intensif et produisent des taches d'impact de gaz sur le matériau à réchauffer, la distance entre les centres desdites taches étant de préférence inférieure à 150 mm et de manière idéale inférieure à 100 mm. Les brûleurs fonctionnent avec une sortie de gaz non enflammé et un préchauffage d'air individuel. Les modules d'ensembles de buses individuels peuvent fonctionner dans n'importe quelle orientation spatiale. Ces modules d'ensembles de buses de brûleur peuvent être placés les uns derrière les autres en vue d'une meilleure efficacité.
EP05775824A 2004-07-21 2005-07-21 Ensemble de buses de bruleur a echangeurs de chaleur integres Withdrawn EP1769196A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004035276A DE102004035276A1 (de) 2004-07-21 2004-07-21 Brennerdüsenfeld mit integrierten Wärmetauschern
PCT/EP2005/007985 WO2006008169A1 (fr) 2004-07-21 2005-07-21 Ensemble de buses de bruleur a echangeurs de chaleur integres

Publications (1)

Publication Number Publication Date
EP1769196A1 true EP1769196A1 (fr) 2007-04-04

Family

ID=35276411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05775824A Withdrawn EP1769196A1 (fr) 2004-07-21 2005-07-21 Ensemble de buses de bruleur a echangeurs de chaleur integres

Country Status (4)

Country Link
US (1) US20070122756A1 (fr)
EP (1) EP1769196A1 (fr)
DE (1) DE102004035276A1 (fr)
WO (1) WO2006008169A1 (fr)

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US11585601B2 (en) * 2018-08-03 2023-02-21 Wisys Technology Foundation, Inc. Flameless impingement oven

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US20070122756A1 (en) 2007-05-31
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