EP0229231A2 - Burner for the combustion of fuels with reduced production of nitric oxides - Google Patents

Burner for the combustion of fuels with reduced production of nitric oxides Download PDF

Info

Publication number
EP0229231A2
EP0229231A2 EP86113814A EP86113814A EP0229231A2 EP 0229231 A2 EP0229231 A2 EP 0229231A2 EP 86113814 A EP86113814 A EP 86113814A EP 86113814 A EP86113814 A EP 86113814A EP 0229231 A2 EP0229231 A2 EP 0229231A2
Authority
EP
European Patent Office
Prior art keywords
burner
guide tube
air box
temperature
muffle
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
EP86113814A
Other languages
German (de)
French (fr)
Other versions
EP0229231B1 (en
EP0229231A3 (en
Inventor
Josef Gyarmati
Richard Minarik
Waldemar Hartmann
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.)
Deutsche Babcock Werke AG
Original Assignee
Leobersdorfer Maschinenfabrik GmbH
Deutsche Babcock Werke AG
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 Leobersdorfer Maschinenfabrik GmbH, Deutsche Babcock Werke AG filed Critical Leobersdorfer Maschinenfabrik GmbH
Priority to AT86113814T priority Critical patent/ATE51065T1/en
Publication of EP0229231A2 publication Critical patent/EP0229231A2/en
Publication of EP0229231A3 publication Critical patent/EP0229231A3/en
Application granted granted Critical
Publication of EP0229231B1 publication Critical patent/EP0229231B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/008—Flow control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/06041—Staged supply of oxidant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/09002—Specific devices inducing or forcing flue gas recirculation

Definitions

  • the invention relates to a burner for burning liquid and / or gaseous fuels with reduced formation of nitrogen oxides with the features of the preamble of claim 1.
  • Such a burner is known from EP-OS 0 139 085.
  • temperatures between 500 and 1100 degrees C occur due to the suction of flue gas from the combustion chamber.
  • high-temperature-resistant, metallic internals are used in the burner throat. With the fuels used and the temperatures that occur, there is a risk of high-temperature corrosion, particularly when burning sulfur-containing heavy oil.
  • the invention is based, to design the generic burner while maintaining the stepped air task in such a way that no high-temperature corrosion occurs.
  • This burner uses materials that are resistant to both oxidizing and reducing atmospheres.
  • the parts made of the temperature and corrosion-resistant material are shaped so that a staged air supply and a back suction of flue gas for the purpose of suppressing the formation of nitrogen oxides during combustion is possible.
  • the burner arrangement consists of an air box 1 through which a burner lance 2 for oil and a plurality of burner lances 3 for gas are passed.
  • the gas burner lances 3 are arranged around the oil burner lance 2.
  • An impeller 4 is slidably mounted on the oil burner lance 2.
  • the burner lances 2, 3 are surrounded by a first guide tube 5, the inlet opening of which lies within the air box 1 and the outlet opening 6 of which lies within the burner mouth, which is represented by the burner throat 7.
  • a combustion chamber 8 connects to the burner groove 7.
  • the air box 1 is separated from the burner groove 7 by a cover plate 9 through which the first guide tube 5 projects.
  • a swirl device 10 and an air guide tube 11 are provided in the rearward extension of the first guide tube 5.
  • the air guide tube 11 is axially adjustable via a linkage 12 guided to the outside. In one end position, the air guide tube 11 covers the air inlet cross section on the swirl device 10. In the other end position of the air guide tube 11, the air inlet cross section on the swirl device 10 is released and the rest of the inlet cross section covers the first guide tube.
  • a further guide tube is arranged within the burner groove 7 in the longitudinal axis of the burner at an axial distance from the outlet opening 6 of the first guide tube 5 and the cover plate 9 of the air box 1.
  • This further guide tube consists of a non-metallic, ceramic muffle 13 made of a temperature and corrosion resistant material.
  • This material can be recrystallized silicon carbide or ramming paste.
  • the muffle 13 is made up of sectors 14 which are bonded to the joints 15 with a temperature-resistant felt.
  • the sectors 14 of the muffle 13 remain freely movable with respect to one another.
  • the sectors 14 assembled in this way form a self-supporting, annular body.
  • the muffle 13 is supported by molded arms 16 on the wall of the burner groove 7 and is secured there against axial displacement. It is secured by gluing or by ceramic fasteners.
  • the muffle 13 is provided with axial passage openings 17 through which pipes 18 are passed.
  • the tubes 18 penetrate the cover plate 9 and protrude with their open end into the air box 1.
  • the other end of the tubes 18 protrudes beyond the muffle 13 and into the combustion chamber 8. This end of the tubes 18 can be beveled, the exit edge then running parallel to the spray angle 19 of the oil jet emerging from the oil burner lance 2.
  • the tubes 18 can be made from refractory ceramic, for example from aluminum silicate or from infiltrated silicon carbide. In order to be able to absorb thermal stresses, the tubes 18 are encased in the area of the penetration of the muffle 13 by a temperature-resistant felt. All ceramic inner parts of the burner are constructed in such a way that an exchange from the combustion chamber 8 is possible and that time-consuming dismantling of the air box, the fuel connection lines and others are eliminated.

Abstract

1. Burner, for the combustion of liquid and/or gaseous fuels with reduced formation of nitrous oxides, in which burner lances (2, 3) are led through an air box (1) and surrounded by a first guide tube (5), the entry opening of which for primary air is provided within the air box (1) and the exit opening (6) of which is provided within the burner throat (7), which is separated from the air box (1) by a cover plate (9), wherein a secondary air duct feed is arranged within the burner throat (7), is connected at the entry side by way of tubes (18) with the air box (1) and has an exit cross-section lying downstream of the exit cross-section (6) of the first guide tube (5) and wherein a further guide tube is provided within the burner throat (7) and arranged for the conduction of recirculating flue gases at a radial spacing from the burner throat (7) and the first guide tube (5) and at an axial spacing from the cover plate (9) of the air box (1), characterised thereby, that the further guide tube consists of a muffle (13), which is built up of non-metallic sectors (14), which are resistant to corrosion and unaffected by changes in temperature and which are movable one relative to the other and form a self-supporting annular body, and that the muffle (13) is supported and fastened at the burner throat (7) and penetrated by the tubes (18), which form the secondary air guide and are of a material which is resistant to corrosion and unaffected by changes in temperature.

Description

Die Erfindung betrifft einen Brenner zum Verbrennen von flüssigen und/oder gasförmigen Brennstoffen unter verminderter Bildung von Stickoxiden mit den Merkmalen des Oberbegriffes des Anspruches 1.The invention relates to a burner for burning liquid and / or gaseous fuels with reduced formation of nitrogen oxides with the features of the preamble of claim 1.

Ein solcher Brenner ist aus der EP-OS 0 139 085 bekannt. Durch die Rücksaugung von Rauchgas aus dem Feuerraum treten je nach der Art des Brennstoffes und der Anordnung der Brenner an der Brennerkehle Temperaturen zwischen 500 und 1100 Grad C auf. Bei dem bekannten Brenner sind in der Brennerkehle hochtemperaturbeständige, metallische Einbauten eingesetzt. Bei den verwendeten Brennstoffen und den auftretenden Temperaturen besteht insbesondere bei der Verbrennung von schwefelhaltigem Schweröl die Gefahr des Auftretens von Hochtemperaturkorrosion.Such a burner is known from EP-OS 0 139 085. Depending on the type of fuel and the arrangement of the burners on the burner throat, temperatures between 500 and 1100 degrees C occur due to the suction of flue gas from the combustion chamber. In the known burner, high-temperature-resistant, metallic internals are used in the burner throat. With the fuels used and the temperatures that occur, there is a risk of high-temperature corrosion, particularly when burning sulfur-containing heavy oil.

Die Verwendung von hochtemperaturbeständigen, keramischen Werkstoffen für die inneren Teile in Brennern ist an sich bekannt. Bei einem solchen Brenner (US-PS 43 80 429) wird Rauchgas durch einen innenliegenden Rezirkulationskanal aus dem Feuerraum angesaugt. Diesem Rauchgas wird die gesamte Verbrennungsluft innerhalb des Brenners beigemischt. Bei diesem Brenner liegen somit andere Verbrennungsverhältnisse vor als bei dem gattungsgemäßen Brenner.The use of high-temperature-resistant, ceramic materials for the inner parts in burners is known per se. In such a burner (US Pat. No. 4,380,429), flue gas is drawn in from the combustion chamber through an internal recirculation channel. All of the combustion air within the burner is mixed with this flue gas. This burner therefore has different combustion conditions than the generic burner.

Der Erfindung liegt die Aufgabe zugrunde, den gattungsgemäßen Brenner unter Beibehaltung der gestuften Luftaufgabe derart zu gestalten, daß keine Hochtemperaturkorrosion auftritt.The invention is based, to design the generic burner while maintaining the stepped air task in such a way that no high-temperature corrosion occurs.

Diese Aufgabe wird bei einem gattungsgemäßen Brenner durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved in a generic burner by the characterizing features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.

Bei diesem Brenner sind Werkstoffe verwendet, die sowohl in oxidierender als auch in reduzierender Atmosphäre beständig sind. Die aus dem temperatur- und korrosionsbeständigen Werkstoff gefertigten Teile sind so geformt, daß eine gestufte Luftaufgabe und eine Rücksaugung von Rauchgas zum Zwecke der Unterdrückung der Bildung von Stickoxiden bei der Verbrennung möglich ist.This burner uses materials that are resistant to both oxidizing and reducing atmospheres. The parts made of the temperature and corrosion-resistant material are shaped so that a staged air supply and a back suction of flue gas for the purpose of suppressing the formation of nitrogen oxides during combustion is possible.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert. Es zeigen:

  • Fig. 1 den Längsschnitt durch einen Brenner gemäß der Erfindung,
  • Fig. 2 die Ansicht auf die Muffel des Brenners in Blickrichtung A und
  • Fig. 3 den Schnitt III - III nach Fig. 2.
An embodiment of the invention is shown in the drawing and is explained in more detail below. Show it:
  • 1 shows the longitudinal section through a burner according to the invention,
  • Fig. 2 shows the view of the muffle of the burner in viewing direction A and
  • 3 shows the section III - III according to FIG. 2.

Die Brenneranordnung besteht aus einem Luftkasten 1, durch den eine Brennerlanze 2 für Öl und mehrere Brennerlanzen 3 für Gas hindurchgeführt sind. Die Gasbrennerlanzen 3 sind um die Ölbrennerlanze 2 angeordnet. Auf der Ölbrennerlanze 2 ist ein Impeller 4 verschiebbar befestigt.The burner arrangement consists of an air box 1 through which a burner lance 2 for oil and a plurality of burner lances 3 for gas are passed. The gas burner lances 3 are arranged around the oil burner lance 2. An impeller 4 is slidably mounted on the oil burner lance 2.

Die Brennerlanzen 2, 3 sind von einem ersten Führungsrohr 5 umgeben, dessen Eintrittsöffnung innerhalb des Luftkastens 1 und dessen Austrittsöffnung 6 innerhalb der Brennermündung liegt, die durch die Brennerkehle 7 dargestellt ist. An die Brennerkehle 7 schließt sich ein Feuerraum 8 an. Der Luftkasten 1 ist von der Brennerkehle 7 durch eine Deckplatte 9 getrennt, durch die das erste Führungsrohr 5 hindurchragt.The burner lances 2, 3 are surrounded by a first guide tube 5, the inlet opening of which lies within the air box 1 and the outlet opening 6 of which lies within the burner mouth, which is represented by the burner throat 7. A combustion chamber 8 connects to the burner groove 7. The air box 1 is separated from the burner groove 7 by a cover plate 9 through which the first guide tube 5 projects.

In rückwärtiger Verlängerung des ersten Führungsrohres 5 ist eine Dralleinrichtung 10 und ein Luftleitrohr 11 vorgesehen. Das Luftleitrohr 11 ist über ein nach außen geführtes Gestänge 12 axial verstellbar. In der einen Endstellung überdeckt das Luftleitrohr 11 den Lufteintrittsquerschnitt an der Dralleinrichtung 10. In der anderen Endstellung des Luftleitrohres 11 ist der Lufteintrittsquerschnitt an der Dralleinrichtung 10 freigegeben und der übrige Eintrittsquerschnitt zu dem ersten Führungsrohr überdeckt.A swirl device 10 and an air guide tube 11 are provided in the rearward extension of the first guide tube 5. The air guide tube 11 is axially adjustable via a linkage 12 guided to the outside. In one end position, the air guide tube 11 covers the air inlet cross section on the swirl device 10. In the other end position of the air guide tube 11, the air inlet cross section on the swirl device 10 is released and the rest of the inlet cross section covers the first guide tube.

Innerhalb der Brennerkehle 7 ist in der Längsachse des Brenners in einem axialen Abstand von der Austrittsöffnung 6 des ersten Führungsrohres 5 und der Deckplatte 9 des Luftkastens 1 ein weiteres Führungsrohr angeordnet.A further guide tube is arranged within the burner groove 7 in the longitudinal axis of the burner at an axial distance from the outlet opening 6 of the first guide tube 5 and the cover plate 9 of the air box 1.

Dieses weitere Führungsrohr besteht aus einer nichtmetallischen, keramischen Muffel 13 aus einem temperatur- und korrosionsbeständigen Werkstoff. Dieser Werkstoff kann rekristallisiertes Siliziumkarbid oder auch Stampfmasse sein. Die Muffel 13 ist aus Sektoren 14 aufgebaut, die an den Trennfugen 15 mit einem temperaturbeständigen Filz beklebt sind. Dabei bleiben die Sektoren 14 der Muffel 13 zueinander frei beweglich. Die so zusammengesetzten Sektoren 14 bilden einen selbsttragenden, ringförmigen Körper. Die Muffel 13 stützt sich über angeformte Arme 16 auf der Mauerung der Brennerkehle 7 ab und ist dort gegen ein axiales Verschieben gesichert. Die Sicherung erfolgt durch Verkleben oder durch keramische Befestigungselemente.This further guide tube consists of a non-metallic, ceramic muffle 13 made of a temperature and corrosion resistant material. This material can be recrystallized silicon carbide or ramming paste. The muffle 13 is made up of sectors 14 which are bonded to the joints 15 with a temperature-resistant felt. The sectors 14 of the muffle 13 remain freely movable with respect to one another. The sectors 14 assembled in this way form a self-supporting, annular body. The muffle 13 is supported by molded arms 16 on the wall of the burner groove 7 and is secured there against axial displacement. It is secured by gluing or by ceramic fasteners.

Die Muffel 13 ist mit axialen Durchtrittsöffnungen 17 versehen, durch die Rohre 18 hindurchgeführt sind. Die Rohre 18 durchdringen die Deckplatte 9 und ragen mit ihrem offenen Ende in den Luftkasten 1 hinein. Das andere Ende der Rohre 18 ragt über die Muffel 13 hinaus und in den Feuerraum 8 hinein. Dieses Ende der Rohre 18 kann abgeschrägt sein, wobei dann die Austrittskante parallel zu dem Sprühwinkel 19 des aus der Ölbrennerlanze 2 austretenden Ölstrahles verläuft.The muffle 13 is provided with axial passage openings 17 through which pipes 18 are passed. The tubes 18 penetrate the cover plate 9 and protrude with their open end into the air box 1. The other end of the tubes 18 protrudes beyond the muffle 13 and into the combustion chamber 8. This end of the tubes 18 can be beveled, the exit edge then running parallel to the spray angle 19 of the oil jet emerging from the oil burner lance 2.

Die Rohre 18 können aus feuerfester Keramik, beispielsweise aus Aluminiumsilikat oder aus infiltriertem Siliziumkarbid gefertigt sein. Um Wärmespannungen aufnehmen zu können, werden die Rohre 18 im Bereich der Durchdringung der Muffel 13 von einem temperaturbeständigen Filz umhüllt. Alle keramischen Innenteile des Brenners sind derart konstruiert, daß ein Austausch vom Feuerraum 8 aus möglich ist und daß zeitraubende Demontagen des Luftkastens, der Brennstoffanschlußleitungen und andere entfallen.The tubes 18 can be made from refractory ceramic, for example from aluminum silicate or from infiltrated silicon carbide. In order to be able to absorb thermal stresses, the tubes 18 are encased in the area of the penetration of the muffle 13 by a temperature-resistant felt. All ceramic inner parts of the burner are constructed in such a way that an exchange from the combustion chamber 8 is possible and that time-consuming dismantling of the air box, the fuel connection lines and others are eliminated.

Claims (4)

1. Brenner zum Verbrennen von flüssigen und/oder gasförmigen Brennstoffen unter verminderter Bildung von Stickoxiden, bei dem Brennerlanzen (2,3) durch einen Luftkasten (1) geführt und von einem ersten Führungsrohr (5) umschlossen sind, dessen Eintrittsöffnung innerhalb des Luftkastens (1) und dessen Austrittsöffnung (6) innerhalb der Brennerkehle (7) vorgesehen sind, die von dem Luftkasten (1) durch eine Deckplatte (9) getrennt ist, wobei innerhalb der Brennerkehle (7) eine Sekundärluftzuführung angeordnet ist, die eintrittsseitig mit dem Luftkasten (1) verbunden ist und deren Austrittsquerschnitt stromabwärts des Austrittsquerschnittes (6) des ersten Führungsrohres (5) liegt und wobei innerhalb der Brennerkehle (7) ein weiteres Führungsrohr vorgesehen ist, das in einem radialen Abstand von der Brennerkehle (7) und dem ersten Führungsrohr (5) und in einem axialen Abstand von der Deckplatte (9) des Luftkastens (1) angeordnet ist, dadurch gekennzeichnet, daß das weitere Führungsrohr aus einer nichtmetallischen, temperatur- und korrosionsbeständigen Muffel (13) besteht, die an der Brennerkehle (7) abgestützt und befestigt ist und die von mehreren, die Sekundärluftführung bildenden Rohren (18) aus einem temperatur- und korrosionsbeständigen Werkstoff durchdrungen ist.1. Burner for burning liquid and / or gaseous fuels with reduced formation of nitrogen oxides, in which burner lances (2, 3) are guided through an air box (1) and surrounded by a first guide tube (5), the inlet opening of which inside the air box ( 1) and its outlet opening (6) are provided inside the burner throat (7), which is separated from the air box (1) by a cover plate (9), a secondary air supply being arranged inside the burner throat (7), the inlet side with the air box (1) is connected and the outlet cross section of which is downstream of the outlet cross section (6) of the first guide tube (5) and a further guide tube is provided within the burner groove (7), which is at a radial distance from the burner groove (7) and the first guide tube (5) and at an axial distance from the cover plate (9) of the air box (1), characterized in that the further guide tube a non-metallic, temperature and corrosion-resistant muffle (13) which is supported and fastened to the burner groove (7) and which is penetrated by several tubes (18) which form a secondary air duct and are made of a temperature and corrosion-resistant material. 2. Brenner nach Anspruch 1, dadurch gekennzeichnet, daß die Muffel (13) aus einzelnen Sektoren (14) aufgebaut ist, die an den Trennfugen (15) mit einem temperaturbeständigen Filz beklebt sind.2. Burner according to claim 1, characterized in that the muffle (13) is made up of individual sectors (14) which are glued to the joints (15) with a temperature-resistant felt. 3. Brenner nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Rohre (18) im Bereich der Durchdringung der Muffel (13) mit einem temperaturbeständigen Filz umhüllt sind.3. Burner according to claim 1 or 2, characterized in that the tubes (18) in the area of penetration of the muffle (13) are covered with a temperature-resistant felt. 4. Brenner nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Austrittsenden der Rohre (18) parallel zu dem Sprühwinkel (19) einer zentral im Brenner angeordneten Öllanze (2) abgeschrägt sind.4. Burner according to one or more of claims 1 to 3, characterized in that the outlet ends of the tubes (18) are chamfered parallel to the spray angle (19) of an oil lance (2) arranged centrally in the burner.
EP86113814A 1986-01-13 1986-10-06 Burner for the combustion of fuels with reduced production of nitric oxides Expired - Lifetime EP0229231B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86113814T ATE51065T1 (en) 1986-01-13 1986-10-06 BURNERS FOR COMBUSTING FUELS WITH REDUCED FORMATION OF NITROUS OXIDES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3600665 1986-01-13
DE3600665A DE3600665C1 (en) 1986-01-13 1986-01-13 Burner for burning liquid and / or gaseous fuel with reduced formation of nitrogen oxides

Publications (3)

Publication Number Publication Date
EP0229231A2 true EP0229231A2 (en) 1987-07-22
EP0229231A3 EP0229231A3 (en) 1988-08-31
EP0229231B1 EP0229231B1 (en) 1990-03-14

Family

ID=6291710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113814A Expired - Lifetime EP0229231B1 (en) 1986-01-13 1986-10-06 Burner for the combustion of fuels with reduced production of nitric oxides

Country Status (3)

Country Link
EP (1) EP0229231B1 (en)
AT (1) ATE51065T1 (en)
DE (2) DE3600665C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0893651A1 (en) * 1997-07-22 1999-01-27 Entreprise Generale De Chauffage Industriel Pillard Burner for liquid and gaseous fuel with low nitric oxyde emission

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262981B (en) * 1991-12-30 1995-08-09 Ind Tech Res Inst Dual fuel low nox burner
CZ308899B6 (en) * 2020-12-22 2021-08-11 Vysoké Učení Technické V Brně Air box with flue gas recirculation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2731562A1 (en) * 1977-06-17 1978-12-21 Sonvico Ag Langnau Ing Bureau BURNERS FOR LIQUID AND / OR GASEOUS FUELS
DE3041177A1 (en) * 1979-11-02 1981-05-14 Hague International, South Portland, Me. BURNER
DE3048201A1 (en) * 1980-12-20 1982-07-08 L. & C. Steinmüller GmbH, 5270 Gummersbach Burner for nitrogen-bearing fuels, with coaxial primary air ducts - has furnace gas recirculating ducts to these ducts, pref. entering at restriction
US4347052A (en) * 1978-06-19 1982-08-31 John Zink Company Low NOX burner
US4475885A (en) * 1983-07-28 1984-10-09 Bloom Engineering Company, Inc. Adjustable flame burner

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT358702B (en) * 1975-01-27 1980-09-25 Manich Leo SWIRL BURNER FOR OIL AND / OR GAS OPERATION
DE3327597A1 (en) * 1983-07-30 1985-02-07 Deutsche Babcock Werke AG, 4200 Oberhausen METHOD AND BURNER FOR BURNING LIQUID OR GASEOUS FUELS WITH REDUCED NOX PRODUCTION

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2731562A1 (en) * 1977-06-17 1978-12-21 Sonvico Ag Langnau Ing Bureau BURNERS FOR LIQUID AND / OR GASEOUS FUELS
US4347052A (en) * 1978-06-19 1982-08-31 John Zink Company Low NOX burner
DE3041177A1 (en) * 1979-11-02 1981-05-14 Hague International, South Portland, Me. BURNER
DE3048201A1 (en) * 1980-12-20 1982-07-08 L. & C. Steinmüller GmbH, 5270 Gummersbach Burner for nitrogen-bearing fuels, with coaxial primary air ducts - has furnace gas recirculating ducts to these ducts, pref. entering at restriction
US4475885A (en) * 1983-07-28 1984-10-09 Bloom Engineering Company, Inc. Adjustable flame burner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0893651A1 (en) * 1997-07-22 1999-01-27 Entreprise Generale De Chauffage Industriel Pillard Burner for liquid and gaseous fuel with low nitric oxyde emission
FR2766557A1 (en) * 1997-07-22 1999-01-29 Pillard Chauffage LIQUID AND GASEOUS FUEL BURNERS WITH LOW EMISSION OF NITROGEN OXIDES

Also Published As

Publication number Publication date
DE3669581D1 (en) 1990-04-19
ATE51065T1 (en) 1990-03-15
DE3600665C1 (en) 1987-07-16
EP0229231B1 (en) 1990-03-14
EP0229231A3 (en) 1988-08-31

Similar Documents

Publication Publication Date Title
EP0164576B1 (en) Industrial burner for gaseous or liquid fuels
DE2323382C3 (en) Hydrogen sulfide gas burner
DE3815382C2 (en) Combustion chamber for a gas turbine engine
DE2839703A1 (en) RING-SHAPED DOUBLE BURNER
DE970426C (en) Cyclone combustion chamber for gas turbines
WO1987001434A1 (en) Device for burning oxidizable components in a carrier gas
DE2836433C2 (en) Recuperative burners for industrial furnaces
EP0108888B1 (en) Plant for the heat treatment of granular material
DE2261596C3 (en)
DE3014269C2 (en) Incinerator for the incineration of contaminants in exhaust air and waste substances
EP0229231B1 (en) Burner for the combustion of fuels with reduced production of nitric oxides
DD204299A5 (en) POWER BOILER HEATING WITH A MULTIPLE OF ENGINES
DE2734922A1 (en) METHOD AND DEVICE FOR COOLING EXHAUST MANIFOLD
DE4008692A1 (en) Forced draught oil burner mixer - has tapering tube bent radially inwards at forward end
DE3310500C2 (en) Burners for burning pulverulent fuels, in particular coal dust
DE4011190A1 (en) Recuperative burner for industrial plant
DE3210368C2 (en)
EP0451662B1 (en) Recuperative burner
EP1286115A1 (en) Thermal post-combustion installation
EP0272369A2 (en) Boiler for a low temperature heating system
DE3312353C2 (en) Pulverized coal burners
CH681386A5 (en)
DE2425528A1 (en) HOT BLAST STOVE
DE2053805A1 (en) Recuperative burner
DE3904635A1 (en) BOILER

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RHK1 Main classification (correction)

Ipc: F23D 17/00

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19881019

17Q First examination report despatched

Effective date: 19890126

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 51065

Country of ref document: AT

Date of ref document: 19900315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3669581

Country of ref document: DE

Date of ref document: 19900419

ET Fr: translation filed
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: DEUTSCHE BABCOCK WERKE AKTIENGESELLSCHAFT

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

BECN Be: change of holder's name

Effective date: 19900314

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: 732

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920901

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920924

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920929

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19920930

Year of fee payment: 7

Ref country code: BE

Payment date: 19920930

Year of fee payment: 7

Ref country code: AT

Payment date: 19920930

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19921031

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930922

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19931006

Ref country code: AT

Effective date: 19931006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19931007

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19931031

Ref country code: CH

Effective date: 19931031

Ref country code: BE

Effective date: 19931031

BERE Be: lapsed

Owner name: DEUTSCHE BABCOCK WERKE A.G.

Effective date: 19931031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19940501

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19931006

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940630

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 86113814.7

Effective date: 19940510

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051006