EP0924458B1 - Brenner - Google Patents
Brenner Download PDFInfo
- Publication number
- EP0924458B1 EP0924458B1 EP97811010A EP97811010A EP0924458B1 EP 0924458 B1 EP0924458 B1 EP 0924458B1 EP 97811010 A EP97811010 A EP 97811010A EP 97811010 A EP97811010 A EP 97811010A EP 0924458 B1 EP0924458 B1 EP 0924458B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- front plate
- relief slit
- curvature
- cone bodies
- 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
Links
- 239000000446 fuel Substances 0.000 claims description 36
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 230000008646 thermal stress Effects 0.000 claims description 4
- 230000035882 stress Effects 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims 1
- 241001156002 Anthonomus pomorum Species 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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
- 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
- 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
- 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
- F23D2211/00—Thermal dilatation prevention or compensation
-
- 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
- F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
- F23R2900/00005—Preventing fatigue failures or reducing mechanical stress in gas turbine components
Definitions
- the invention relates to the field of combustion technology. It affects a burner of the double cone type, which for example from the publication EP 0 321 809 B1 or DE 195 48 853 A1 is known.
- EP 0 321 809 B1 describes the basic structure of a premix burner Double cone design described.
- This burner consists essentially of at least two hollow partial cone bodies, which complement one another, with tangential air inlet slots and feeds for gaseous and liquid Fuels in which the central axes of the hollow partial cone bodies are in the direction of flow have widening taper and in the longitudinal direction run offset to each other.
- a fuel nozzle is placed inside the burner head.
- the gaseous Fuel will flow into the combustion airstream prior to its inflow the burner interior via gas injectors arranged along the inlet slots fed.
- the fuel / air mixture is thus formed directly at the end of the tangential air inlet slots.
- the premix burner On the combustion chamber side, the premix burner has an anchorage for the partial cone body serving front panel.
- the burner of the Double cone design due to the application of media of various kinds Temperatures high thermal voltages.
- This thermal exposure is system-related and can with regard to the thermal expansion in the direction of the burner axis only inadequate Mass to be changed.
- the invention seeks to remedy this. It is based on the task, the well-known Double-cone type burners with simple constructional means change that he is largely relieved of thermal stresses.
- a burner for burning liquid and gaseous fuels consisting essentially of at least two hollow partial cone bodies that complement one another, with tangential ones Air inlet slots and with feeds for gaseous and liquid fuels, in which the central axes of the hollow partial cone body one in the direction of flow have widening taper and in the longitudinal direction to each other run offset, whereby in the conical formed by the partial cone bodies A fuel nozzle for the liquid fuel is placed inside the burner head and the feeds for the gaseous fuel with fuel injectors are provided, and on the combustion chamber side a front plate as an anchor for the Partial cone body is arranged, said partial cone body due to different thermal stress different thermal expansions subject in the direction of the burner axis, in particular the front panel is cyclically stressed at the burner outlet, achieved in that in the Front plate locally between the areas of different axial expansion at least one relief slot is arranged in order to increase flexibility, that the partial cone bodies are not completely separated from each other, but still a material bridge remains between them
- the advantages of the invention are that the flexible design of the Connection of the areas of different axial expansions at the burner outlet Too high thermal voltages are avoided and thus the lifespan of the Brenners is increased.
- the at least one relief slot per partial cone body can either arranged integrally within the single-piece front panel be, with the necessary material bridge through outside areas the front panel itself or by means of an additional, welded to the front panel Part are formed.
- the relief slot in the front panel in the area of The partial cone body begins to meet, essentially parallel to that respective partial cone body and the closure of the relief slot in Direction of the partial cone body is curved.
- a relief slot arranged integrally within the front panel useful if the top of the relief slot with respect the main direction of extension of the relief slot in their direction is deflected at least about 180 °, the deflection in a notch Fracture mechanics considerations, the largest radius of curvature at the point of greatest tension in the front panel is placed and the wall piece over the inside of the curve a sufficiently dimensioned material bridge (not to be confused with the material bridge between the partial cone bodies) connected to the rest of the wall is. Then the slot does not lead to unwanted crack growth.
- the curvature of the relief slot end the shape of a half to three-quarter circle, an ellipse, spiral or has a similar curve because these shapes are particularly well suited To prevent crack growth.
- Fig. 1 shows a perspective view of a premix burner of the double-cone type.
- Fig. 2 is used.
- the burner consists of two hollow partial cone bodies 1, 2 which are offset from one another lie on one another.
- the two partial cone bodies 1, 2 each have a cylindrical starting part 9, 10, which also run offset from one another, so that also in this area the tangential air inlet slots 5, 6 are present.
- This cylindrical Initial part 9, 10 is a nozzle 11 for atomizing the liquid fuel 12 accommodated.
- the burner can also be used without the cylindrical starting parts 9, 10 be designed so that it is purely conical.
- the two partial cone bodies 1, 2 each have a fuel line 13, 14, which are provided with openings 15, which fuel injectors represent. Through the fuel injectors 15 gaseous fuel 16 through the tangential air inlet slots 5, 6 flowing combustion air 7 admixed.
- the burner On the combustion chamber side 17, the burner has an anchorage for the partial cone body 1, 2 serving front panel 18.
- liquid fuel 12 If liquid fuel 12 is used to operate the burner, it flows through the nozzle 11 and is at an acute angle into the burner interior 8 injected, resulting in a homogeneous fuel spray.
- the conical Liquid fuel profile 23 is rotating from a tangentially flowing Combustion air flow 7 enclosed. In the axial direction, the concentration of the liquid fuel 12 continuously through the mixed combustion air 7 reduced.
- the optimal fuel concentration across the cross section is only in Area of the vortex burst, i.e. in the area of the inner recirculation zone 24 reached.
- the ignition takes place at the tip of the inner recirculation zone 24. Only at this point does a stable flame front 25 arise.
- the flame stabilization results from an increase in the swirl number in the direction of flow along the Cone axis. The flame strikes back inside the burner normal operating conditions.
- burners of the double-cone type are known. Typical for these burners is the occurrence of thermal stresses at the burner outlet because there are areas different axial thermal expansion meet, because the firstly, outside parts of the partial cone bodies 1, 2 are less strong exposed to radiation and secondly by the inflowing air 7 and in same area supplied fuel gas 16 cooled more than the internal Areas with a higher operating temperature.
- the relief slot 30 z. B. integral within the a single part existing front panel 18 may be arranged (see Fig. 3 and 4), whereby the outer areas of the front panel connect the two parts Form material bridge, or it runs radially on a relatively short path to the edge of the front panel and the material bridge connecting the two parts is by means of an additional part welded to the front panel 31 formed (see Fig. 5).
- the tip 32 of the relief slot 30 is with respect to the main direction of propagation of the relief slot 30 in their direction by at least about Deflected 180 °, the deflection in a notch and fracture mechanics point of view generously dimensioned curvature 33 takes place, the largest Radius of curvature r at the point of greatest tension in the front plate 18 is placed and the wall piece in the interior of the curve 33 over a sufficiently dimensioned material cross section 36 connected to the rest of the wall is.
- the curvature 33 can take the form of a half to three-quarter circle (see Fig. 3), a half to three-quarter ellipse (see Fig. 4) or a spiral or similar curve (not shown).
- the Slot 30 also begins in the area where the partial cone bodies meet 1, 2.
- the relief slot 30 leads in a slight arc to relative direct path to the edge of the front panel, creating the partial cone body as well half of the front panel are cut free from each other.
- the connection in this example, between these parts is formed by a front slipped ring 31, with the partially present "collar" 37 of the front panel is welded.
- the direct connection of the areas is different thermal expansion at the burner outlet made more flexible. Thereby too high thermal voltages are avoided and the premix burner can therefore be used over a longer period of time.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Description
- Fig. 1
- eine perspektivische Darstellung des Doppelkegelbrenners;
- Fig. 2
- einen Querschnitt des Brenners gemäss Fig. 1 entlang der Ebene II-II;
- Fig. 3
- eine perspektivische Darstellung des Brenners im Bereich des Brenneraustrittes in einer ersten Ausführungsvariante der Erfindung;
- Fig. 4
- eine perspektivische Darstellung des Brenners im Bereich des Brenneraustrittes in einer zweiten Ausführungsvariante der Erfindung;
- Fig. 5
- eine perspektivische Darstellung des Brenners im Bereich des Brenneraustrittes in einer dritten Ausführungsvariante der Erfindung.
- 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
- 22
- Brennerachse
- 23
- Flüssigbrennstoffprofil
- 24
- innere Rezirkulationszone
- 25
- Flammenfront
- 30
- Entlastungsschlitz
- 31
- angeschweisstes Teil an Pos. 18 (Ring)
- 32
- Spitze von Pos. 30
- 33
- Krümmung von Pos. 30
- 34
- Schweissnaht
- 35
- Schweissnahtende
- 36
- Materialbrücke
- 37
- Kragen von Pos. 18
- r
- maximaler Krümmungsradius
Claims (8)
- Brenner zum Verbrennen von flüssigen (12) und gasförmigen Brennstoffen (16), im wesentlichen 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 brennraumseitig eine Frontplatte (18) als Verankerung für die Teilkegelkörper (1, 2) angeordnet ist, wobei besagte Teilkegelkörper (1, 2) infolge unterschiedlicher thermischer Beanspruchung unterschiedliche thermische Dehnungen in Richtung der Brennerachse (22) aufweisen, und insbesondere die Frontplatte (18) am Brenneraustritt zyklisch beansprucht ist, dadurch gekennzeichnet, dass in der Frontplatte (18) örtlich zwischen den Bereichen unterschiedlicher axialer Dehnung mindestens ein Entlastungsschlitz (30) zwecks Flexibilitätserhöhung angeordnet ist, wobei der Entlastungsschlitz (30) die Teilkegelkörper (1, 2) nicht vollständig voneinander trennt, sondern noch eine Materialbrücke zwischen ihnen verbleibt.
- Brenner nach Anspruch 1, dadurch gekennzeichnet, dass der mindestens eine Entlastungsschlitz (30) integral innerhalb der aus einem einzigen Teil bestehenden Frontplatte (18) angeordnet ist.
- Brenner nach Anspruch 1, dadurch gekennzeichnet, dass der mindestens eine Entlastungsschlitz (30) die Frontplatte ganz durchschneidet, wobei besagter Entlastungsschlitz (30) in einem leichten Bogen zum Rand der Frontplatte (18) verläuft, und die die Teile verbindende Materialbrücke durch ein zusätzliches, mit der Frontplatte verschweisstes Teil (31) gebildet ist.
- Brenner nach Anspruch 2, dadurch gekennzeichnet, dass der mindestens eine Entlastungsschlitz (30) in der Frontplatte (18) im Bereich des Zusammentreffens der Teilkegelkörper (1, 2) beginnt, im wesentlichen parallel zu dem jeweiligen Teilkegelkörper (1, 2) verläuft und der Abschluss des Entlastungsschlitzes in Richtung der Teilkegelkörper (1, 2) gekrümmt ist.
- Brenner nach Anspruch 4, dadurch gekennzeichnet, dass die Spitze (32) des Entlastungsschlitzes (30) bezüglich der Haupterstreckungsrichtung des Entlastungsschlitzes (30) in ihrer Richtung um mindestens etwa 180 ° umgelenkt ist, wobei die Umlenkung in einer nach Kerb- und Bruchmechanik-Gesichtspunkten grosszügig bemessenen Krümmung (33) erfolgt, der grösste Krümmungsradius (r) an der Stelle der grössten Spannung in der Frontplatte (18) gelegt wird und das Wandstück im Inneren des Krümmungsbogens (33) über eine ausreichend bemessene Materialbrücke (36) mit dem Rest der Wand verbunden ist.
- Brenner nach Anspruch 5, dadurch gekennzeichnet, dass die Krümmung (33) des Entlastungsschlitzes (30) die Form eines Halb- bis Dreiviertelkreises aufweist.
- Brenner nach Anspruch 5, dadurch gekennzeichnet, dass die Krümmung (33) des Entlastungsschlitzes (30) die Form einer Halb- bis Dreiviertelellipse oder ähnlicher Kurven aufweist.
- Brenner nach Anspruch 5, dadurch gekennzeichnet, dass die Krümmung (33) des Entlastungsschlitzes (30) die Form einer Spirale aufweist.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97811010A EP0924458B1 (de) | 1997-12-22 | 1997-12-22 | Brenner |
DE59708077T DE59708077D1 (de) | 1997-12-22 | 1997-12-22 | Brenner |
US09/210,741 US5980240A (en) | 1997-12-22 | 1998-12-15 | Burner |
JP36462798A JP4106144B2 (ja) | 1997-12-22 | 1998-12-22 | バーナ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97811010A EP0924458B1 (de) | 1997-12-22 | 1997-12-22 | Brenner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0924458A1 EP0924458A1 (de) | 1999-06-23 |
EP0924458B1 true EP0924458B1 (de) | 2002-08-28 |
Family
ID=8230541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97811010A Expired - Lifetime EP0924458B1 (de) | 1997-12-22 | 1997-12-22 | Brenner |
Country Status (4)
Country | Link |
---|---|
US (1) | US5980240A (de) |
EP (1) | EP0924458B1 (de) |
JP (1) | JP4106144B2 (de) |
DE (1) | DE59708077D1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2001232891A1 (en) * | 2000-02-03 | 2001-08-14 | Corning Incorporated | Refractory burner nozzle with stress relief slits |
DE10051221A1 (de) * | 2000-10-16 | 2002-07-11 | Alstom Switzerland Ltd | Brenner mit gestufter Brennstoff-Eindüsung |
JP3940705B2 (ja) * | 2003-06-19 | 2007-07-04 | 株式会社日立製作所 | ガスタービン燃焼器及びその燃料供給方法 |
EP1714081B1 (de) * | 2004-02-12 | 2008-04-09 | Alstom Technology Ltd | Vormischbrenneranordnung zum betreiben einer brennkammer sowie verfahren zum betreiben einer brennkammer |
CN101137868A (zh) * | 2005-03-09 | 2008-03-05 | 阿尔斯通技术有限公司 | 用于产生可燃燃料/气体混合物的预混燃烧器 |
FR2897144B1 (fr) * | 2006-02-08 | 2008-05-02 | Snecma Sa | Chambre de combustion de turbomachine a fentes tangentielles |
US8511089B2 (en) * | 2009-07-31 | 2013-08-20 | Rolls-Royce Corporation | Relief slot for combustion liner |
EP2327933A1 (de) * | 2009-11-30 | 2011-06-01 | Siemens Aktiengesellschaft | Brenneranordnung |
US9129778B2 (en) * | 2011-03-18 | 2015-09-08 | Lam Research Corporation | Fluid distribution members and/or assemblies |
US8794544B2 (en) | 2011-06-06 | 2014-08-05 | General Electric Company | Combustor nozzle and method for modifying the combustor nozzle |
EP2685161B1 (de) * | 2012-07-10 | 2018-01-17 | Ansaldo Energia Switzerland AG | Brenneranordnung, insbesondere für eine Gasturbine |
EP2685160B1 (de) * | 2012-07-10 | 2018-02-21 | Ansaldo Energia Switzerland AG | Multikonus-Vormischungsbrenner für eine Gasturbine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4198815A (en) * | 1975-12-24 | 1980-04-22 | General Electric Company | Central injection fuel carburetor |
CH674561A5 (de) | 1987-12-21 | 1990-06-15 | Bbc Brown Boveri & Cie | |
JPH05141657A (ja) * | 1991-11-20 | 1993-06-08 | Hitachi Ltd | ガスタービン燃焼器 |
GB2287310B (en) * | 1994-03-01 | 1997-12-03 | Rolls Royce Plc | Gas turbine engine combustor heatshield |
DE4426353A1 (de) * | 1994-07-25 | 1996-02-01 | Abb Research Ltd | Brenner |
US5479773A (en) * | 1994-10-13 | 1996-01-02 | United Technologies Corporation | Tangential air entry fuel nozzle |
DE19548853A1 (de) * | 1995-12-27 | 1997-07-03 | Abb Research Ltd | Kegelbrenner |
-
1997
- 1997-12-22 DE DE59708077T patent/DE59708077D1/de not_active Expired - Lifetime
- 1997-12-22 EP EP97811010A patent/EP0924458B1/de not_active Expired - Lifetime
-
1998
- 1998-12-15 US US09/210,741 patent/US5980240A/en not_active Expired - Lifetime
- 1998-12-22 JP JP36462798A patent/JP4106144B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59708077D1 (de) | 2002-10-02 |
US5980240A (en) | 1999-11-09 |
JP4106144B2 (ja) | 2008-06-25 |
JPH11241811A (ja) | 1999-09-07 |
EP0924458A1 (de) | 1999-06-23 |
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