EP0807787B1 - Brenner - Google Patents
Brenner Download PDFInfo
- Publication number
- EP0807787B1 EP0807787B1 EP97810221A EP97810221A EP0807787B1 EP 0807787 B1 EP0807787 B1 EP 0807787B1 EP 97810221 A EP97810221 A EP 97810221A EP 97810221 A EP97810221 A EP 97810221A EP 0807787 B1 EP0807787 B1 EP 0807787B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- fuel
- air
- overlap angle
- increases
- 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
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
- F23C7/002—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
- 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
Definitions
- the invention relates to the field of combustion technology. It concerns a double cone type burner, in which the combustion air flow before its inflow gaseous fuel is fed into the burner interior becomes.
- EP 0 321 809 B1 describes the basic structure of a burner the double-cone design known to the invention refers.
- This burner consists essentially of hollow, partial conical bodies that complement one another, 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 air entry level and the gas entry level (Perforation level) thus fall with this known one State of the art together.
- the last gas injectors along the air inlet slots are very close to in this known prior art Burner outlet and therefore also near the flame.
- the length of the pre-mixing section is therefore very high at these points in short so that the fuel coming from these is downstream last injector located is bad can mix with the air. Because of the bad premix of the fuel with air arise locally with a rich fuel / air mixture, which leads to higher flame temperatures and thus also leads to higher NOx values. Furthermore the additional load on the firing front is in these regions so high that they overheat and the material there is protected by an expensive zirconium coating must become.
- a burning that corresponds to the preamble of claim 1 is known from EP 0 641 971 A2
- the invention tries to avoid all of these disadvantages. It is based on the task of a double cone burner to create which is simply constructed and therefore is inexpensive to manufacture and in which an improved Premix the gaseous fuel from the downstream located last gas injection nozzles with the combustion air takes place, so that compared to the known prior art the NOx emissions are reduced and the burner front is thermally less stressed, so that expensive special coatings the burner front can be dispensed with.
- this is achieved in that a burner according to the preamble of claim 1 the overlap angle in Flow direction of the burner increases and at the same time Increase in the overlap angle of the distance between the fuel injectors increases from the air inlet level into the burner. The fuel injection level and the air entry level fall therefore no longer together, but the fuel injection level changes position along the burner to the air inlet level.
- the advantages of the invention include that in the area of the downstream fuel injectors Due to the increased premixing distance, the premixing of the gaseous fuel improved with the combustion air will, so the NOx emissions and the thermal load the burner front can be reduced.
- the burner stands out due to a more stable flame position and less pulsations out.
- the overlap angle in the cone tip is 0 ° and steady up to the burner front increases, the maximum overlap angle being 90 °.
- FIG. 1 shows a perspective view of the inventive Burner.
- FIG. 1 shows a perspective view of the inventive Burner.
- the two partial cone bodies 1, 2 each have a cylindrical starting part 9, 10 which also run offset to each other, so that this too Area the tangential air inlet slots 5, 6 are present are.
- In 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 Initial parts 9, 10 are designed so that it is purely conical is trained. Then the fuel nozzle 11 is directly in the Cone tip housed.
- the two partial cone bodies 1, 2 each have a fuel line 13, 14 with openings 15 are provided, which represent fuel injectors.
- the fuel injectors 15 make gaseous fuel 16 through the tangential air inlet slots 5, 6 flowing combustion
- 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, if necessary, dilution or cooling air 20 the front part of the combustion chamber 17th or whose wall can be fed.
- liquid fuel 12 is used to operate the burner, so it flows through the nozzle 11 and is in one injected acute angle 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 reduced.
- 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 backflow zone 24.
- the ignition takes place at the top of the backflow zone 24. Only at this point creates a stable flame front 25.
- the flame stabilization results from an increase in the swirl number in the direction of flow along the cone axis. The flame strikes back now does not occur inside the burner.
- the overlap two partial cone bodies 1, 2 partially, the overlap angle ⁇ in the cone tip is 0 ° (i.e. lies there no overlap before) and ⁇ then in the flow direction up to to the burner outlet, i.e. up to the front plate 18, increases continuously. 90 ° can be specified as the maximum overlap angle ⁇ become.
- the fuel injectors 15 are further upstream.
- the air inlet level 21 and the fuel injection level thus fall 22 no longer together.
- the fuel injection level 22 changes direction along the double cone burner Burner front their position to air inlet level 21 so large that ever longer pre-mixing distances from the respective Fuel injection of the gaseous fuel 16 can be reached up to the air inlet level 21.
- the flame compared to the previously known State of the art in which the partial cone bodies 1, 2 do not overlap and the fuel injection plane 22 of the Air inlet level 21 corresponds to a more stable position.
- the inventive Brenner also is less prone to pulsation. It is constructive designed quite simply (e.g. without complicated Transition pieces to extend the premix section) and therefore inexpensive to manufacture.
- 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.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Description
- Fig. 1
- einen Doppelkegelbrenner in perspektivischer Darstellung;
- Fig. 2
- einen schematischen Querschnitt des Brenners gemäss Fig. 1 entlang der Ebene II-II;
- Fig. 3
- einen schematischen Querschnitt des Brenners gemäss Fig. 1 entlang der Ebene III-III;
- Fig. 4
- einen schematischen 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
- 20
- Verdünnungs- bzw. Kühlluft
- 21
- Lufteintrittsebene
- 22
- Brennstoffinjektionsebene
- 23
- Flüssigbrennstoffprofil
- 24
- Rückströmzone
- 25
- Flammenfront
- δ
- Überlappungswinkel
Claims (2)
- 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), welche mindestens eine Lufteintrittsebene (21) in den Brenner bestimmen, 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 mit Brennstoffinjektoren (15) versehen sind, welche mindestens eine Brennstoffinjektionsebene (22) bestimmen, wobei sich die Teilkegelkörper (1, 2) zumindestens teilweise überlappen, dadurch gekennzeichnet, dass der Überlappungswinkel (δ) in Strömungsrichtung des Brenners zunimmt und gleichzeitig mit Zunahme des Überlappungswinkels (δ) der Abstand der Brennstoffinjektoren (15) von der Lufteintrittsebene (21) in den Brenner zunimmt.
- Brenner nach Anspruch 1, dadurch gekennzeichnet, dass der Überlappungswinkel (δ) in der Kegelspitze 0° beträgt und stromabwärts stetig bis zur Brennerfront (18) zunimmt, wobei der maximale Überlappungswinkel (δ) 90° beträgt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19619873A DE19619873A1 (de) | 1996-05-17 | 1996-05-17 | Brenner |
DE19619873 | 1996-05-17 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0807787A2 EP0807787A2 (de) | 1997-11-19 |
EP0807787A3 EP0807787A3 (de) | 1999-03-24 |
EP0807787B1 true EP0807787B1 (de) | 2003-05-28 |
Family
ID=7794546
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97810221A Expired - Lifetime EP0807787B1 (de) | 1996-05-17 | 1997-04-14 | Brenner |
Country Status (5)
Country | Link |
---|---|
US (1) | US5921766A (de) |
EP (1) | EP0807787B1 (de) |
JP (1) | JP3863631B2 (de) |
CN (1) | CN1117243C (de) |
DE (2) | DE19619873A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE59710380D1 (de) * | 1997-11-21 | 2003-08-07 | Alstom | Brenner für den Betrieb eines Wärmeerzeugers |
US6141954A (en) * | 1998-05-18 | 2000-11-07 | United Technologies Corporation | Premixing fuel injector with improved flame disgorgement capacity |
EP1262714A1 (de) * | 2001-06-01 | 2002-12-04 | ALSTOM (Switzerland) Ltd | Brenner mit Abgasrückführung |
DE10333671A1 (de) | 2003-07-24 | 2005-08-04 | Alstom Technology Ltd | Verfahren zur Reduktion der Nox-Emissionen einer mehrere Brenner umfassenden Brenneranordnung sowie Brenneranordnung zur Durchführung des Verfahrens |
US7097448B2 (en) * | 2004-05-07 | 2006-08-29 | Peter Chesney | Vortex type gas lamp |
WO2011085105A2 (en) | 2010-01-06 | 2011-07-14 | The Outdoor Greatroom Company Llp | Fire container assembly |
US10281140B2 (en) | 2014-07-15 | 2019-05-07 | Chevron U.S.A. Inc. | Low NOx combustion method and apparatus |
US11852319B2 (en) * | 2021-02-26 | 2023-12-26 | Armando Parra | Control means for vortex flame device |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3570471A (en) * | 1969-02-14 | 1971-03-16 | Thermo Electron Corp | Radiant tube having uniform high-temperature distribution |
EP0210462B1 (de) * | 1985-07-30 | 1989-03-15 | BBC Brown Boveri AG | Dualbrenner |
CH674561A5 (de) * | 1987-12-21 | 1990-06-15 | Bbc Brown Boveri & Cie | |
ATE124528T1 (de) * | 1990-10-17 | 1995-07-15 | Asea Brown Boveri | Brennkammer einer gasturbine. |
DE59104727D1 (de) * | 1991-12-23 | 1995-03-30 | Asea Brown Boveri | 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 |
DE4330083A1 (de) * | 1993-09-06 | 1995-03-09 | Abb Research Ltd | Verfahren zum Betrieb eines Vormischbrenners |
US5461865A (en) * | 1994-02-24 | 1995-10-31 | United Technologies Corporation | Tangential entry fuel nozzle |
DE19502796B4 (de) * | 1995-01-30 | 2004-10-28 | Alstom | Brenner |
-
1996
- 1996-05-17 DE DE19619873A patent/DE19619873A1/de not_active Withdrawn
-
1997
- 1997-04-14 EP EP97810221A patent/EP0807787B1/de not_active Expired - Lifetime
- 1997-04-14 DE DE59710156T patent/DE59710156D1/de not_active Expired - Lifetime
- 1997-05-07 US US08/852,548 patent/US5921766A/en not_active Expired - Lifetime
- 1997-05-16 CN CN97111195A patent/CN1117243C/zh not_active Expired - Lifetime
- 1997-05-16 JP JP12659797A patent/JP3863631B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59710156D1 (de) | 2003-07-03 |
CN1117243C (zh) | 2003-08-06 |
JP3863631B2 (ja) | 2006-12-27 |
CN1172227A (zh) | 1998-02-04 |
JPH1068511A (ja) | 1998-03-10 |
US5921766A (en) | 1999-07-13 |
EP0807787A3 (de) | 1999-03-24 |
EP0807787A2 (de) | 1997-11-19 |
DE19619873A1 (de) | 1997-11-20 |
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