EP0229231B1 - 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

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Publication number
EP0229231B1
EP0229231B1 EP86113814A EP86113814A EP0229231B1 EP 0229231 B1 EP0229231 B1 EP 0229231B1 EP 86113814 A EP86113814 A EP 86113814A EP 86113814 A EP86113814 A EP 86113814A EP 0229231 B1 EP0229231 B1 EP 0229231B1
Authority
EP
European Patent Office
Prior art keywords
burner
guide tube
air box
tubes
air
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.)
Expired - Lifetime
Application number
EP86113814A
Other languages
German (de)
French (fr)
Other versions
EP0229231A2 (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 MASCHFAB AG
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 MASCHFAB AG, Deutsche Babcock Werke AG filed Critical LEOBERSDORFER MASCHFAB AG
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

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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-A 0 139 085.
  • temperatures between 500 and 1100 degrees C occur due to the suction of smoke 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.
  • a burner is known in which the flue gas cooled by the combustion air is supplied via an external line. This flue gas / combustion air mixture is fed to the burner in stages, with part of the mixture being blown into the combustion chamber via pipes which are let into the burner throat.
  • the invention is based on the object. to design the generic burner so that resistance to high temperature corrosion is given while maintaining the stepped air supply and with a simple assembly.
  • This burner uses materials that are resistant to both oxidizing and reducing atmospheres. Due to their design, the parts made of the temperature and corrosion-resistant material allow a staged air supply and a suction of smoke gas for the purpose of suppressing the formation of nitrogen oxides during combustion.
  • the ceramic inner parts of the burner are designed such that an exchange from the combustion chamber is possible, so that time-consuming dismantling of the air box and the connecting lines can be omitted.
  • 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 chamfered, 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. For warmth To be able to absorb tensions, 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)

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-A 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-A 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 smoke 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-A 4 380 429) 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-A 4,380,429), flue gas is sucked out of 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.

Aus der DE-A 2 731 562 ist ein Brenner bekannt, bei dem der Verbrennungsluft abgekühltes Rauchgas über eine externe Leitung zugeführt wird. Dieses Rauchgas-Verbrennungsluft-Gemisch wird dem Brenner gestuft aufgegeben, wobei ein Teil des Gemisches in die Brennkammer über Rohre eingeblasen wird, die in die Brennerkehle eingelassen sind.From DE-A 2 731 562 a burner is known in which the flue gas cooled by the combustion air is supplied via an external line. This flue gas / combustion air mixture is fed to the burner in stages, with part of the mixture being blown into the combustion chamber via pipes which are let into the burner throat.

Der Erfindung liegt die Aufgabe zugrunde. den gattungsgemäßen Brenner so zu gestalten, daß unter Beibehaltung der gestuften Luftaufgabe und bei einer einfachen Montage eine Beständigkeit gegen Hochtemperaturkorrosion gegeben ist.The invention is based on the object. to design the generic burner so that resistance to high temperature corrosion is given while maintaining the stepped air supply and with a simple assembly.

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 lassen aufgrund ihrer Gestaltung eine gestufte Luftaufgabe und eine Rücksaugung von Rauchgas zum Zwecke der Unterdrückung der Bildung von Stickoxiden bei der Verbrennung zu. Dabei sind die keramischen Innenteile des Brenners derart ausgebildet, daß ein Austausch vom Feuerraum aus möglich ist, so daß zeitraubende Demontagen des Luftkastens und der Anschlußleitungen entfallen können.This burner uses materials that are resistant to both oxidizing and reducing atmospheres. Due to their design, the parts made of the temperature and corrosion-resistant material allow a staged air supply and a suction of smoke gas for the purpose of suppressing the formation of nitrogen oxides during combustion. The ceramic inner parts of the burner are designed such that an exchange from the combustion chamber is possible, so that time-consuming dismantling of the air box and the connecting lines can be omitted.

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 111 - 111 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 111-111 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 ÖIbrennerlanze 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 Sprühwinkei 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 chamfered, 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. For warmth To be able to absorb tensions, 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. 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.
2. Burner according to claim 1, characterised thereby, that the individual sectors (14) have a felt, which is unaffected by changes in temperature, glued to them at the separating lines (15).
3. Burner according to claim 1 or 2, characterised thereby, that the tubes (18) are enveloped by a felt, which is unaffected by changes in temperature, in the region of penetration of the muffle (13).
4. Burner according to one or more of the claims 1 to 3, characterised thereby, that the exit ends of the tubes (18) are bevelled parallelly 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
DE3600665A DE3600665C1 (en) 1986-01-13 1986-01-13 Burner for burning liquid and / or gaseous fuel with reduced formation of nitrogen oxides
DE3600665 1986-01-13

Publications (3)

Publication Number Publication Date
EP0229231A2 EP0229231A2 (en) 1987-07-22
EP0229231A3 EP0229231A3 (en) 1988-08-31
EP0229231B1 true 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
CZ308899B6 (en) * 2020-12-22 2021-08-11 Vysoké Učení Technické V Brně Air box with flue gas recirculation

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
FR2766557B1 (en) * 1997-07-22 1999-10-22 Pillard Chauffage LIQUID AND GASEOUS FUEL BURNERS WITH LOW EMISSION OF NITROGEN OXIDES

Family Cites Families (7)

* 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
CH622081A5 (en) * 1977-06-17 1981-03-13 Sulzer Ag
US4347052A (en) * 1978-06-19 1982-08-31 John Zink Company Low NOX burner
US4380429A (en) * 1979-11-02 1983-04-19 Hague International Recirculating 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
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ308899B6 (en) * 2020-12-22 2021-08-11 Vysoké Učení Technické V Brně Air box with flue gas recirculation

Also Published As

Publication number Publication date
DE3600665C1 (en) 1987-07-16
DE3669581D1 (en) 1990-04-19
EP0229231A2 (en) 1987-07-22
ATE51065T1 (en) 1990-03-15
EP0229231A3 (en) 1988-08-31

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