EP0433554A1 - Brûleur pour la combustion de combustibles liquides ou gazeux - Google Patents

Brûleur pour la combustion de combustibles liquides ou gazeux Download PDF

Info

Publication number
EP0433554A1
EP0433554A1 EP90116229A EP90116229A EP0433554A1 EP 0433554 A1 EP0433554 A1 EP 0433554A1 EP 90116229 A EP90116229 A EP 90116229A EP 90116229 A EP90116229 A EP 90116229A EP 0433554 A1 EP0433554 A1 EP 0433554A1
Authority
EP
European Patent Office
Prior art keywords
burner
mixing
combustion
burner according
chamber
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Withdrawn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
EP90116229A
Other languages
German (de)
English (en)
Inventor
Karl Dipl.-Ing. Kündig
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.)
ELCO ENERGIESYSTEME AG
Original Assignee
ELCO ENERGIESYSTEME 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 ELCO ENERGIESYSTEME AG filed Critical ELCO ENERGIESYSTEME AG
Publication of EP0433554A1 publication Critical patent/EP0433554A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • 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
    • F23D11/40—Mixing tubes; Burner heads
    • F23D11/402—Mixing chambers downstream of the nozzle
    • 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 the combustion of liquid or gaseous fuels, consisting of an atomizer nozzle which can be supplied with the fuel via a fuel line, an air supply line for the combustion air conveyed by a fan or the like, a through a burner tube projecting into a boiler chamber formed combustion chamber and an aperture provided with a central opening.
  • a burner of this type is known under the name "DFVLR combustion system blue burner".
  • a large number of bores are machined into the burner tube in this configuration and a mixing tube is also inserted into the burner tube, by means of which the exhaust gas is introduced into the combustion air downstream of the atomizer nozzle .
  • the object of the invention is therefore to design a burner of the aforementioned type in such a way that an optimal combustion of the air-fuel mixture, which is to be formed with little energy through the controlled introduction of a large amount of exhaust gas into the supplied combustion air, above all also Already in the starting phase, in the combustion chamber is made possible and that the proportion of nitrogen oxides in the exhaust gases can be reduced to a considerable extent during the entire operating time of the burner.
  • the burner which should also be easy to adjust and regulate to the particular circumstances, should work extremely quietly and the flame should always be stable and burn out blue at a low temperature level. The construction effort required for this should be kept low, and burners should also be retrofittable in order to improve the combustion in existing plants and thus to ensure a nitrogen oxide reduction.
  • the atomizer nozzle extends through the screen and is arranged in the flow direction of the combustion air behind the screen, that the atomizer nozzle is wholly or partially surrounded by a mixing element which is connected to the atomizer nozzle and / or its casing and / or its Bracket forms a mixing chamber with an annular cross section, and that the boiler chamber is connected to the mixing chamber via one or more channels for introducing exhaust gas into the combustion chamber.
  • the mixing element concentrically with the atomizing nozzle and / or its casing and / or its holder and to form it by a sleeve inserted into or attached to the burner tube, the mixing element being provided with a diffuser on the side facing the combustion chamber can and should be arranged adjustable in the axial direction of the atomizer nozzle relative to this and / or the diaphragm.
  • the diaphragm and / or the mixing chamber can also be formed in a simple manner by internals arranged in the burner tube.
  • the atomizer nozzle in the area of the orifice with a cylindrical, preferably stepped and / or conically shaped casing, which is arranged to be adjustable in the axial direction of the orifice to change the free flow cross section of the orifice.
  • the pressure and / or the amount of combustion air supplied can also be regulated by means of a throttle valve or the like.
  • the burner tube and / or the mixing element can be arranged at an axial distance from the diaphragm, so that the channel for supplying exhaust gas into the mixing chamber is formed by the distance between these components, with the change in the flow cross section and thus the the amount of exhaust gas that can be supplied, the burner tube and / or the mixing element should be axially adjustable relative to the orifice.
  • the burner tube can also be provided in the flow direction behind the diaphragm with recesses communicating with the channels for supplying exhaust gas, for example in the form of holes and / or slots, for connecting the boiler space to the mixing chamber.
  • Optimum combustion can be achieved in particular if the cross-sectional area through which the mixing chamber can flow is dimensioned approximately 1.4-3 times larger than the free cross-sectional area of the orifice, the channels and recesses in the burner tube that can flow through the exhaust gases and connect the boiler chamber to the mixing chamber have a cross-sectional area which corresponds approximately to 0.8-2 times the free cross-sectional area of the orifice and the mixing section of the mixing chamber has an axial length which corresponds to approximately 0.5-10 times the hydraulic diameter of the mixing chamber.
  • the atomizer nozzle should be arranged at an axial distance from the end of the burner tube that is at least 1.6 times the diameter of the burner tube.
  • a large amount of exhaust gas can be controlled in a controlled manner before the combustion air flows into the combustion chamber, so that a blue-burning soot-free flame with an extremely low proportion of nitrogen oxides can be achieved in the exhaust gases; and due to the injector effect, which is caused by the combustion air flowing through the mixing chamber at high speed, the exhaust gas is sucked into it and mixed intensively with the combustion air accelerated by the orifice, an almost stoichiometric combustion of the fuel expelled from the atomizer nozzle at a low temperature level , since the burner flame is cooled by the exhaust gas, is guaranteed.
  • the flame formation in the combustion chamber is not impaired by internals.
  • the construction cost, by means of which such an optimal combustion is made possible, is extremely low, since a mixing chamber can only be formed with the help of the mixing element and a corresponding arrangement of the atomizing nozzle, which is to be connected upstream of the combustion chamber.
  • the length of the mixing section of the mixing chamber, the amounts of the combustion air to be supplied as well as the exhaust gas, as well as the flow velocities, are easily adaptable to different circumstances, so that the burner designed according to the proposal not only has a high degree of efficiency, but can also be regulated without difficulty and always an optimal design is to be achieved.
  • the burner shown in FIG. 1 and designated 1 serves for the combustion of liquid or gaseous media and essentially consists of a burner tube 11 and an atomizing nozzle 12 which, via a fuel line provided with a filter 17, by means of a pump 16 inserted therein from a storage container 14 the fuel is supplied.
  • the atomizer nozzle 12, to which an ignition electrode 18 is assigned, is supported by means of brackets 24 in an air supply line 13 to which the burner tube 11 is fastened by means of a bracket 23.
  • the air supply line 13, in which the combustion air conveyed by a fan 19 is supplied, is inserted in a wall 3 of a boiler 2, so that the burner tube 11, which surrounds a combustion chamber 20, projects into the boiler chamber 4.
  • an aperture 21 is arranged which has a central opening 22.
  • the atomizer nozzle 12 passes through the opening 22 of the orifice 21 in the burner 1 and is thus arranged behind the orifice 21 in the flow direction of the combustion air indicated by the arrow P.
  • a mixing chamber 32 is used, which is formed by a mixing element 31 arranged concentrically with the atomizing nozzle 12 in the form of a sleeve 34 and a cylindrical jacket 25 of the atomizing nozzle 12 and thus has an annular cross section.
  • the mixing chamber 32 is constantly connected to the boiler chamber 4 via an annular channel 33.
  • the sleeve 34 is inserted in an axially adjustable manner in an extension 35 of the burner tube 11, and this is also axially adjustable by means of the holder 23 relative to the diaphragm 21, so that the distances a and b between the latter and the burner tube 11 or the mixing element 31 can be easily changed. Furthermore, the flow-through cross-section of the orifice opening 22 can be changed continuously with the aid of a further cone-shaped casing 26 of the atomizing nozzle 12, and the quantity and / or the pressure of the combustion air supplied can be adjusted by means of a throttle valve 27 assigned to the fan 19.
  • the burner 51 according to FIG. 2 also consists of a burner tube 61, an atomizing nozzle 62 provided with an ignition electrode 68, an air supply line 63 formed by an extension of the burner tube 61, and an orifice 71 arranged between the latter and the burner tube 61, the opening 72 of which from the atomizing nozzle 62 is penetrated so that it is in turn arranged in the flow direction indicated by the arrow P behind the aperture 71.
  • the air supply line 63 is inserted into a wall 53 of a boiler 52, the burner tube 61, which surrounds a combustion chamber 70, thus projects into the boiler room 54 of the boiler 52.
  • a mixing element 81 is inserted into the burner tube 61, which together with a casing 66 of the atomizing nozzle 62 and its fuel supply line 65 forms a mixing chamber 82 with an annular cross section.
  • an annular channel 83 which is provided between the diaphragm 71 and the mixing element 81 designed as a sleeve 84 and is connected to the boiler chamber 54 via recesses 64 machined into the burner tube 61, the exhaust gas is released by the combustion air flowing out of the diaphragm 71 at high speed sucked in and thus introduced into the mixing chamber with little expenditure of energy and mixed there with the combustion air flowing at high speed.
  • the exhaust gas is intimately mixed with the combustion air, the degree of mixing being selectively influenced by the length of the mixing chamber 82, so that optimum combustion at a low temperature level can be achieved in the combustion chamber 70.
  • a diffuser 85 attached to the end of the mixing element 81 and / or a conical extension 86 of the mixing chamber 82 provided in the area of the atomizing nozzle 62, the flow rate of the fuel mixture can be reduced in order not to impair the flame formation.
  • the cross-sectional area that can be flowed through and designated by C should be dimensioned about 1.4-3 times larger than the free cross-sectional area A of the diaphragm 71, and the annular channel 83 should also be or the recesses 64 have a cross-sectional area B which corresponds approximately to 0.8-2 times the cross-sectional area A of the diaphragm 21.
  • its mixing section 1 should extend over an axial length which corresponds to approximately 0.5-10 times the hydraulic diameter of the mixing chamber 82.
  • the atomizing nozzle 62 should be arranged at an axial distance L in front of the end of the burner tube 61 which is at least 1.6 times larger is the diameter D of the burner tube 61.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP90116229A 1989-11-23 1990-08-24 Brûleur pour la combustion de combustibles liquides ou gazeux Withdrawn EP0433554A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3938786 1989-11-23
DE3938786A DE3938786A1 (de) 1989-11-23 1989-11-23 Brenner zur verbrennung von fluessigen oder gasfoermigen brennstoffen

Publications (1)

Publication Number Publication Date
EP0433554A1 true EP0433554A1 (fr) 1991-06-26

Family

ID=6394029

Family Applications (2)

Application Number Title Priority Date Filing Date
EP90116229A Withdrawn EP0433554A1 (fr) 1989-11-23 1990-08-24 Brûleur pour la combustion de combustibles liquides ou gazeux
EP90122073A Expired - Lifetime EP0430011B1 (fr) 1989-11-23 1990-11-19 Brûleur pour la combustion de combustibles liquides ou gazeux

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP90122073A Expired - Lifetime EP0430011B1 (fr) 1989-11-23 1990-11-19 Brûleur pour la combustion de combustibles liquides ou gazeux

Country Status (3)

Country Link
EP (2) EP0433554A1 (fr)
AT (1) ATE134259T1 (fr)
DE (2) DE3938786A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612959A1 (fr) * 1993-02-23 1994-08-31 D.W. Clysan B.V. Brûleur à venturi

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4209221A1 (de) * 1992-03-21 1993-09-23 Deutsche Forsch Luft Raumfahrt Stickoxidarmer brenner
ATE199452T1 (de) * 1993-12-18 2001-03-15 Deutsch Zentr Luft & Raumfahrt Einstellbarer blaubrenner
DE4430889A1 (de) 1993-12-18 1995-07-06 Deutsche Forsch Luft Raumfahrt Verbrennungsoptimierter Blaubrenner
DE4415717C2 (de) * 1994-05-04 2001-03-01 Man B & W Diesel Ag Brenner
DE4415676C2 (de) * 1994-05-04 2001-03-01 Man B & W Diesel Ag Brenner
DE4436912A1 (de) * 1994-10-15 1996-04-18 Broetje August Gmbh & Co Gebläsebrenner mit Brennraum und Verfahren zum Betreiben des Brenners
DE19601581A1 (de) * 1996-01-18 1997-07-24 Broetje August Gmbh & Co Verfahren zum Betreiben eines Gebläsebrenners zur Durchführung des Verfahrens
CN115638408B (zh) * 2022-10-21 2025-08-15 济宁华源热电有限公司 一种锅炉用微油点火及助燃系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB833087A (en) * 1956-10-04 1960-04-21 Petro Chem Process Company Inc A heavy fuel burner
FR1270432A (fr) * 1960-10-18 1961-08-25 Appareil pour la combustion de combustibles liquides ou gazeux suivant le principe de la recirculation
US3741166A (en) * 1972-02-10 1973-06-26 F Bailey Blue flame retention gun burners and heat exchanger systems
DE2603988A1 (de) * 1975-02-06 1976-08-19 Hultgren Karl S H Vorrichtung an einem oelbrennerkopf
JPS55107811A (en) * 1979-02-14 1980-08-19 Daido Steel Co Ltd Radiant tube heating device
GB2053447A (en) * 1979-07-09 1981-02-04 Blueray Systems Inc Blue flame burner
DE8910924U1 (de) * 1989-09-13 1989-11-02 August Brötje GmbH & Co, 2902 Rastede Brennerkopf eines Gebläsebrenners

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE543828C (de) * 1929-09-11 1932-02-10 Herzoglich Schleswig Holsteini Pressgasbrenner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB833087A (en) * 1956-10-04 1960-04-21 Petro Chem Process Company Inc A heavy fuel burner
FR1270432A (fr) * 1960-10-18 1961-08-25 Appareil pour la combustion de combustibles liquides ou gazeux suivant le principe de la recirculation
US3741166A (en) * 1972-02-10 1973-06-26 F Bailey Blue flame retention gun burners and heat exchanger systems
DE2603988A1 (de) * 1975-02-06 1976-08-19 Hultgren Karl S H Vorrichtung an einem oelbrennerkopf
JPS55107811A (en) * 1979-02-14 1980-08-19 Daido Steel Co Ltd Radiant tube heating device
GB2053447A (en) * 1979-07-09 1981-02-04 Blueray Systems Inc Blue flame burner
DE8910924U1 (de) * 1989-09-13 1989-11-02 August Brötje GmbH & Co, 2902 Rastede Brennerkopf eines Gebläsebrenners

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 4, no. 158 (M-39)(640) 5 November 1980, & JP-A-55 107811 (DAIDO TOKUSHUKO KK) 19 August 1980, *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612959A1 (fr) * 1993-02-23 1994-08-31 D.W. Clysan B.V. Brûleur à venturi

Also Published As

Publication number Publication date
EP0430011A1 (fr) 1991-06-05
DE3938786A1 (de) 1991-05-29
DE59010136D1 (de) 1996-03-28
ATE134259T1 (de) 1996-02-15
EP0430011B1 (fr) 1996-02-14

Similar Documents

Publication Publication Date Title
EP0580683B1 (fr) Bruleur, en particulier pour turbines a gaz, pour la combustion peu polluante du gaz de houille et d'autres combustibles
EP0902233B1 (fr) Buse de pulvérisation par pression combinée
EP0274630B1 (fr) Agencement pour un brûleur
EP1356236B1 (fr) Brûleur de prémélange et son mode de fonctionnement
DE1551637A1 (de) Heizvorrichtung
DE2208574A1 (de) Brennerkopf
EP0433554A1 (fr) Brûleur pour la combustion de combustibles liquides ou gazeux
DE1751491A1 (de) Brenner fuer gasfoermige und fluessige Brennstoffe
EP1030106B1 (fr) Bruleur à flamme bleue optimisant la combustion
EP0683883B1 (fr) Bruleur a flamme bleue optimisant la combustion
EP0410135B1 (fr) Brûleur pour la combustion stoechiométrique de combustible liquide ou gazeux
EP0491079B1 (fr) Tête de brûleur pour la combustion à mélange préalable d'un combustible liquide dans une installation de combustion atmosphérique
EP0809070B1 (fr) Brûleur avec recirculation des gaz d'échappement
DE2843002C2 (de) Heizölbrenner
AT395764B (de) Vormischgasbrenner
AT404399B (de) Verfahren und brenner zum verbrennen insbesondere flüssiger brennstoffe
EP0114610A1 (fr) Brûleur à combustion stoechiométrique de combustible liquide ou gazeux
DE3826279A1 (de) Gasbrenner
DE19824719C2 (de) Brenner, insbesondere Ölbrenner
EP0683884B1 (fr) Bruleur a flamme bleue ajustable
DE9000960U1 (de) Einrichtung zur stufenweisen Verbrennung eines Brennstoff-Primärluft-Gemisches
EP1489352B1 (fr) Dispositif de mélange pour un brûleur au gaz ou au fioul
DE4330082A1 (de) Brenner
DE2835335A1 (de) Brenner fuer durchlauferhitzer
DE4115814C2 (fr)

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: A1

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

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19911227