EP0816759A2 - Vormischbrenner und Verfahren zum Betrieb des Brenners - Google Patents
Vormischbrenner und Verfahren zum Betrieb des Brenners Download PDFInfo
- Publication number
- EP0816759A2 EP0816759A2 EP97810385A EP97810385A EP0816759A2 EP 0816759 A2 EP0816759 A2 EP 0816759A2 EP 97810385 A EP97810385 A EP 97810385A EP 97810385 A EP97810385 A EP 97810385A EP 0816759 A2 EP0816759 A2 EP 0816759A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- fuel
- gaseous
- flow
- interior
- 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
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
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/40—Mixing tubes or chambers; Burner heads
- F23D11/402—Mixing chambers downstream of the nozzle
-
- 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
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
- F23R3/10—Air inlet arrangements for primary air
- F23R3/12—Air inlet arrangements for primary air inducing a vortex
-
- 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
- F23C2202/40—Inducing local whirls around flame
-
- 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
- F23C2900/07002—Premix burners with air inlet slots obtained between offset curved wall surfaces, e.g. double cone burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2209/00—Safety arrangements
- F23D2209/20—Flame lift-off / stability
Definitions
- the invention relates to the field of combustion technology. It concerns a premix burner of the double cone type and a method of operating the burner.
- EP 0 321 809 B1 describes the basic structure of a burner the double-cone design known to the invention relates.
- This burner consists essentially of hollow, partial conical bodies complementing a body, with tangential air inlet slots and feeds for gaseous and liquid fuels where the central axes the hollow partial cone body is widening in the direction of flow Have a taper and in the longitudinal direction to each other run staggered.
- In the part cone bodies formed conical interior is a fuel nozzle on the burner head placed.
- the gaseous fuel becomes the combustion air flow prior to its inflow into the interior of the burner arranged along the entry slots Gas injectors supplied.
- the formation of the fuel / air mixture thus happens directly at the end of the tangential air inlet slots.
- the entry level of the combustion air and the gas entry level (perforation level) fall at this known prior art together.
- the cause of the vibrations and the extinction at comparatively fuel-rich conditions is the inadequate Flame stabilization of the burner.
- the burner will stabilized by the inner recirculation zone, which in the Head stage operation is supplied with additional fuel.
- the outer shear layer of the fuel / air mixture emerging from the burner which has a much larger contact area between fresh gas and exhaust gas compared to the inner one Recirculation zone is available, however, so far not used for stabilization.
- the invention seeks to remedy this. You have the task based on the well-known burner of the double-cone design with simple constructive means and to change it operate in such a way that additional stabilization of the Flame occurs without causing a significant increase of pollutant emission levels is coming.
- this is achieved in that one Burner according to the preamble of claim 1 in the burner sickle at least one bore is arranged, which the supply of gaseous fuel to the outer recirculation zone serves. According to the invention, this is the case with a method to operate the burner by approx. 3 up to 8% of the total gaseous fuel to the outside Recirculation zone can be mixed.
- the advantages of the invention include that the flame stability is improved, i.e. there are fewer Pressure pulsations in the flame. Also draws the burner according to the invention compared to the known one State of the art due to a lower lean extinguishing limit off so that it has an expanded operating range. By intensifying the outer reaction front Another advantage is a shortened burnout length.
- FIG. 1 shows a perspective view of the invention Burner.
- FIG. 1 shows a perspective view of the invention Burner.
- the burner consists of two hollow partial cone bodies 1, 2, which are offset from one another.
- the dislocation the respective central axes 3, 4 of the partial cone bodies 1, 2 to one another creates a mirror image arrangement on both sides each have a tangential air inlet slot 5, 6, through which the combustion air 7 in the interior 8 of the Brenners arrives.
- the two partial cone bodies 1, 2 each have a cylindrical starting part 9, 10, which also run offset to each other, so that in this area too the tangential air inlet slots 5, 6 are present.
- this cylindrical starting part 9, 10 is a nozzle 11 for Atomization of the liquid fuel 12 housed.
- the Burner can also without the cylindrical starting parts 9, 10th be designed so that it is purely conical. Then the fuel nozzle 11 is accommodated directly in the cone tip.
- the two partial cone bodies 1, 2 each have one Fuel line 13, 14, which are provided with openings 15 which are fuel injectors. Through the Fuel injectors 15 becomes gaseous fuel 16 flowing through the tangential air inlet slots 5, 6 Combustion air 7 added
- Combustion chamber side 17 has a burner as an anchor for the partial cone body 1, 2 serving front plate 18 with a Number of holes 19 through which dilution or cooling air 20 the front part of the combustion chamber 17 or its wall can be supplied.
- liquid fuel 12 is used to operate the burner, so it flows through the nozzle 11 and is in one acute angle injected into the burner interior 17, wherein a homogeneous fuel spray is established.
- the conical Liquid fuel profile 23 is of a tangentially flowing rotating combustion air flow 7 enclosed.
- concentration of the liquid fuel becomes axial 12 continuously through the mixed combustion air 7 decreased.
- the optimal fuel concentration over the Cross section is only in the area of the vertebral burst, i.e. reached in the area of the inner recirculation zone 24.
- the Ignition occurs at the top of the inner recirculation zone 24. This is in the so-called head stage operation (not shown) supplied with additional fuel. Only at this point creates a stable flame front 25.
- the flame stabilization results from an increase in the number of swirls in the direction of flow along the cone axis. The flame strikes back enters the inside of the burner under normal operating conditions not on.
- this outer recirculation zone is located 28 in the outer area of the combustion chamber 17, close the wall of the combustion chamber 21.
- the holes 27 can be in different ways in the burner sickle 26 may be arranged, for example parallel to Burner axis 22. In other embodiments, they can also at an angle to the burner axis 22 of approximately 45 ° be arranged obliquely outwards, so that the additional gaseous fuel 16 injected towards the combustion chamber wall becomes. It is particularly advantageous if the bores 27 are arranged so that the additional gaseous fuel 16 in the counter-swirl direction to the recirculation flow is introduced because then a particularly intensive mixture of the additional fuel with the recirculating exhaust gas and the resulting flame stabilization is particularly high is.
- the burner is to be operated such that only about 3 to 8% of the total gaseous fuel through the Open openings 27 into the outer recirculation zone 28. Since the cooling air 20 is already mixed in at this point and the recirculating exhaust gases are already part of theirs have given sensible heat to the front panel 18 this additional fuel addition is not worth mentioning Increase in NOx emissions. This is particularly true when the injections are small enough to stabilize to avoid at the entrance beams. After Fuel is mixed in after a certain ignition delay time Auto ignition and just before or directly on the outer shear layer of the emerging fuel / air mixture.
- the invention provides an additional external stabilization (by mini pilots), which among other things to an extension the operating range of the burner and to an increased Flame stability leads.
- FIG. 4 is a concrete embodiment in a cross section presented the invention.
- the cross section shows the area the burner exit sickle 26.
- In the sickle 26 there are 14 Positions on the circumference with an angular division of approximately 10 ° Bores 26 arranged with a diameter of 0.8 mm.
- the number and size of the bores 26 were chosen so that approx. 3% of the total fuel mass flow there and in the outer recirculation zone, not shown in Fig. 4 28 can be mixed.
- inventive Solution can also be used for burners, which consist of more than two partial cone bodies, e.g. for so-called Four-slot burner.
- the holes 27 can also both in number and in their position in the Burner sickle 26 vary. You just have to take care that the additional fuel mass flow that goes into the outer recirculation zone is mixed in, no more than accounts for approx. 8% of the total fuel.
Abstract
Description
- Fig. 1
- eine perspektivische Darstellung des Doppelkegelbrenners;
- Fig. 2
- einen Längsschnitt des Brenners mit der Brennkammer in schematischer Darstellung;
- Fig. 3
- einen Querschnitt des Brenners gemäss Fig. 1 entlang der Ebene III-III;
- Fig. 4
- einen Querschnitt des Brenners gemäss Fig. 1 entlang der Ebene IV-IV.
- 1
- Teilkegelkörper
- 2
- Teilkegelkörper
- 3
- Mittelachse von Pos. 1
- 4
- Mittelachse von Pos. 2
- 5
- tangentialer Lufteintrittsschlitz
- 6
- tangentialer Lufteintrittsschlitz
- 7
- Verbrennungsluft
- 8
- Brennerinnenraum
- 9
- zylindrischer Anfangsteil von Pos. 1
- 10
- zylindrischer Anfangsteil von Pos. 2
- 11
- Brennstoffdüse
- 12
- flüssiger Brennstoff
- 13
- Brennstoffleitung für Pos. 16
- 14
- Brennstoffleitung für Pos. 16
- 15
- Brennstoffinjektor für Pos. 16
- 16
- gasförmiger Brennstoff
- 17
- Brennraum
- 18
- Frontplatte
- 19
- Bohrung für Pos. 20
- 20
- Verdünnungs- bzw. Kühlluft
- 21
- Brennkammer
- 22
- Brennerachse
- 23
- Flüssigbrennstoffprofil
- 24
- innere Rezirkulationszone
- 25
- Flammenfront
- 26
- Brennersichel
- 27
- Bohrung
- 28
- äussere Rezirkulationszone
Claims (5)
- Brenner zum Verbrennen von flüssigen (12) und gasförmigen Brennstoffen (16), bestehend aus mindestens zwei hohlen, sich zu einem Körper ergänzenden Teilkegelkörpern (1, 2), mit tangentialen Lufteintrittsschlitzen (5, 6) und mit Zuführungen (13, 14) für gasförmige (16) und flüssige Brennstoffe (12), bei welchem die Mittelachsen (3, 4) der hohlen Teilkegelkörper (1, 2) eine in Strömungsrichtung sich erweiternde Kegelneigung aufweisen und in Längsrichtung zueinander versetzt verlaufen, wobei im von den Teilkegelkörpern (1, 2) gebildeten kegelförmigen Innenraum (8) am Brennerkopf eine Brennstoffdüse (11) für den flüssigen Brennstoff (12) plaziert ist und die Zuführungen (13, 14) für den gasförmigen Brennstoff (16) mit Brennstoffinjektoren (15) versehen sind, und die Lufteintrittsschlitze (5, 6) brennraumseitig durch eine Brennersichel (26) abgeschlossen sind, dadurch gekennzeichnet, dass in der Brennersichel (26) mindestens eine Bohrung (27) angeordnet sind, welche zur Zufuhr von gasförmigem Brennstoff (16) vorgesehen ist.
- Brenner nach Anspruch 1, dadurch gekennzeichnet, dass die mindestens eine Bohrung (27) parallel zur Brennerachse (22) angeordnet ist.
- Brenner nach Anspruch 1, dadurch gekennzeichnet, dass die mindestens eine Bohrung (27) unter einem Winkel zur Brennerachse (22), vorzugsweise von 45°, schräg nach aussen angeordnet ist.
- Verfahren zum Betrieb eines Brenners nach einem der Ansprüche 1 bis 3, wobei im Innenraum (8) des Brenners eine in Strömungsrichtung sich ausbreitende, die Wände des Innenraumes (8) nicht benetzende kegelförmige Flüssigbrennstoffsäule(23) gebildet wird, welche von einem tangential in den Brenner einströmenden rotierenden Verbrennungsluftstrom (7) umschlossen wird, und/oder dem Verbrennungsluftstrom (7) vor seiner Einströmung in den Innenraum (8) des Brenners gasförmiger Brennstoff(16) zugeführt wird, die Zündung des Gemisches erst am Ausgang des Brenners stattfindet, und im Bereich der Brennermündung durch eine innere Rezirkulationszone (24) die Flamme stabilisiert wird, dadurch gekennzeichnet, dass 3 bis 8% des Gesamtbrennstoffmassenstromes in die äussere Rezirkulationszone (28) eingemischt werden.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass der in die äussere Rezirkulationszone (28) eingemischte Brennstoff (16) entgegen zur Drallrichtung der Rezirkulationsströmung eingedüst wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19626240A DE19626240A1 (de) | 1996-06-29 | 1996-06-29 | Vormischbrenner und Verfahren zum Betrieb des Brenners |
DE19626240 | 1996-06-29 | ||
US08/865,102 US5782627A (en) | 1996-06-29 | 1997-05-29 | Premix burner and method of operating the burner |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0816759A2 true EP0816759A2 (de) | 1998-01-07 |
EP0816759A3 EP0816759A3 (de) | 1998-11-11 |
EP0816759B1 EP0816759B1 (de) | 2003-01-08 |
Family
ID=26027058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97810385A Expired - Lifetime EP0816759B1 (de) | 1996-06-29 | 1997-06-18 | Vormischbrenner und Verfahren zum Betrieb des Brenners |
Country Status (5)
Country | Link |
---|---|
US (1) | US5782627A (de) |
EP (1) | EP0816759B1 (de) |
JP (1) | JPH1061916A (de) |
CN (1) | CN1170844A (de) |
DE (1) | DE19626240A1 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19839085C2 (de) * | 1998-08-27 | 2000-06-08 | Siemens Ag | Brenneranordnung mit primärem und sekundärem Pilotbrenner |
US6672862B2 (en) | 2000-03-24 | 2004-01-06 | North American Manufacturing Company | Premix burner with integral mixers and supplementary burner system |
GB2362847A (en) * | 2000-06-02 | 2001-12-05 | Hamworthy Combustion Eng Ltd | Fuel burner nozzle |
US6360776B1 (en) * | 2000-11-01 | 2002-03-26 | Rolls-Royce Corporation | Apparatus for premixing in a gas turbine engine |
AU2003226079A1 (en) * | 2002-04-09 | 2003-10-27 | Sapias, Inc. | Asset management platform |
US6623267B1 (en) | 2002-12-31 | 2003-09-23 | Tibbs M. Golladay, Jr. | Industrial burner |
US20040202977A1 (en) * | 2003-04-08 | 2004-10-14 | Ken Walkup | Low NOx burner |
CN101069039B (zh) * | 2004-11-30 | 2011-10-19 | 阿尔斯托姆科技有限公司 | 用于在预混合燃烧器中燃烧氢气的方法和设备 |
EP1828684A1 (de) * | 2004-12-23 | 2007-09-05 | Alstom Technology Ltd | Vormischbrenner mit mischstrecke |
DE102006005386B4 (de) * | 2006-02-03 | 2009-04-09 | Uhde Gmbh | Gasbrenner mit optimierter Düsenanordnung |
US20090301054A1 (en) * | 2008-06-04 | 2009-12-10 | Simpson Stanley F | Turbine system having exhaust gas recirculation and reheat |
CN102128453A (zh) * | 2011-01-28 | 2011-07-20 | 岳阳科德科技有限责任公司 | 预燃式燃烧器 |
US8984887B2 (en) * | 2011-09-25 | 2015-03-24 | General Electric Company | Combustor and method for supplying fuel to a combustor |
CZ305842B6 (cs) * | 2014-06-13 | 2016-04-06 | Vysoké Učení Technické V Brně | Hořáková hlava injektorového stabilizačního hořáku |
US10739006B2 (en) * | 2017-03-15 | 2020-08-11 | General Electric Company | Fuel nozzle for a gas turbine engine |
US10982846B2 (en) * | 2017-06-14 | 2021-04-20 | Webster Combustion Technology Llc | Vortex recirculating combustion burner head |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0321809A1 (de) | 1987-12-21 | 1989-06-28 | BBC Brown Boveri AG | Verfahren für die Verbrennung von flüssigem Brennstoff in einem Brenner |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2302483A1 (fr) * | 1975-02-28 | 1976-09-24 | Heurtey Efflutherm | Procede et dispositif d'evaporation et d'oxydation thermique d'effluents liquides |
DE3446788A1 (de) * | 1984-12-21 | 1986-07-03 | L. & C. Steinmüller GmbH, 5270 Gummersbach | Flammenverdampfungsbrenner mit vorbrennkammer |
EP0210462B1 (de) * | 1985-07-30 | 1989-03-15 | BBC Brown Boveri AG | Dualbrenner |
US4863371A (en) * | 1988-06-03 | 1989-09-05 | Union Carbide Corporation | Low NOx high efficiency combustion process |
JP2713627B2 (ja) * | 1989-03-20 | 1998-02-16 | 株式会社日立製作所 | ガスタービン燃焼器、これを備えているガスタービン設備、及びこの燃焼方法 |
CH682952A5 (de) * | 1991-03-12 | 1993-12-15 | Asea Brown Boveri | Brenner für eine Vormischverbrennung eines flüssigen und/oder gasförmigen Brennstoffes. |
CH684962A5 (de) * | 1991-07-03 | 1995-02-15 | Asea Brown Boveri | Brenner zum Betrieb einer Brennkraftmaschine, einer Brennkammer einer Gasturbogruppe oder einer Feuerungsanlage. |
EP0548396B1 (de) * | 1991-12-23 | 1995-02-22 | Asea Brown Boveri Ag | Vorrichtung für die Vermischung zweier gasförmiger Komponenten und Brenner, in welchem diese Vorrichtung eingesetzt wird |
US5307634A (en) * | 1992-02-26 | 1994-05-03 | United Technologies Corporation | Premix gas nozzle |
DE4304213A1 (de) * | 1993-02-12 | 1994-08-18 | Abb Research Ltd | Brenner zum Betrieb einer Brennkraftmaschine, einer Brennkammer einer Gasturbogruppe oder Feuerungsanlage |
DE4411623A1 (de) * | 1994-04-02 | 1995-10-05 | Abb Management Ag | Vormischbrenner |
DE4416650A1 (de) * | 1994-05-11 | 1995-11-16 | Abb Management Ag | Verbrennungsverfahren für atmosphärische Feuerungsanlagen |
-
1996
- 1996-06-29 DE DE19626240A patent/DE19626240A1/de not_active Withdrawn
-
1997
- 1997-05-29 US US08/865,102 patent/US5782627A/en not_active Expired - Fee Related
- 1997-06-18 EP EP97810385A patent/EP0816759B1/de not_active Expired - Lifetime
- 1997-06-27 CN CN97113844.3A patent/CN1170844A/zh active Pending
- 1997-06-27 JP JP9171677A patent/JPH1061916A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0321809A1 (de) | 1987-12-21 | 1989-06-28 | BBC Brown Boveri AG | Verfahren für die Verbrennung von flüssigem Brennstoff in einem Brenner |
Also Published As
Publication number | Publication date |
---|---|
EP0816759B1 (de) | 2003-01-08 |
EP0816759A3 (de) | 1998-11-11 |
DE19626240A1 (de) | 1998-01-02 |
US5782627A (en) | 1998-07-21 |
JPH1061916A (ja) | 1998-03-06 |
CN1170844A (zh) | 1998-01-21 |
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