EP0777081B1 - Vormischbrenner - Google Patents
Vormischbrenner Download PDFInfo
- Publication number
- EP0777081B1 EP0777081B1 EP96810738A EP96810738A EP0777081B1 EP 0777081 B1 EP0777081 B1 EP 0777081B1 EP 96810738 A EP96810738 A EP 96810738A EP 96810738 A EP96810738 A EP 96810738A EP 0777081 B1 EP0777081 B1 EP 0777081B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- premix burner
- burner according
- interior space
- air
- fuel
- 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
- 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
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
-
- 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 present invention relates to a premix burner according to the preamble of claim 1.
- Document EP-A-0 629 817 discloses a premix burner a perforated plate for introducing fresh air into the combustion chamber with the effect over the entire axial length of the perforated Plate to achieve an even ranch gas admixture.
- a burner which essentially consists of a cylindrical chamber, which in turn has several tangentially arranged slots, through which the combustion air inside the chamber flows.
- these slots at the transition to the interior the chamber, act in the axial direction a number of Fuel nozzles, through which preferably a gaseous one Fuel mixed with the combustion air flowing through there becomes.
- the interior of the chamber is also with provided a conical body, which is in the direction of flow tapered, being conical in the area of the tip Body more fuel nozzles for one preferably liquid fuel are provided. Downstream from the top of the cone the combustion air becomes ignition for this body brought.
- the flow in the chamber must itself be subcritical, i.e. the twist count must be here be so small that there is no vortex burst.
- the critical swirl number can be corrected by three parameters Reaching the place: By changing the width of the tangential slots, and on the other hand by an adjustment the angle of the conical body inside the chamber and by adding a central supporting air, it is swirled or untwisted. Due to the fuel injection in the area of the slots, these are severely limited in their design.
- the invention seeks to remedy this.
- the invention how it is characterized in the claims, the task lies the basis for a premix burner of the type mentioned Way to improve the quality of the mixture and the risk of reignition to eliminate during the whole operation.
- the main advantage of the invention is that that the improvement in all spin-stabilized premix burners, especially among those who avail themselves the critical swirl number to form a backflow zone work, lets apply that on the principle two or more staggered partial shells are constructed, the offset partial shells air inlet slots form the parallel, opening or closing to the burner axis run.
- FIG. 2 or 3 In order to better understand the structure of the premix burner 1 it is advantageous if also FIG. 2 or 3 can be used. Furthermore, not unnecessary to Fig. 1 The supply channels 11c are confusing and 12c according to FIG. 2 or 3 have not been shown in more detail. in the the following will be as needed in the description of FIG. 1 referred to the remaining FIGS. 2 and 3.
- the premix burner according to FIG. 1 consists of two hollow partial shells 11, 12 which are nested in one another offset from one another (cf. FIG. 2).
- the offset of the respective central axis or longitudinal axis of symmetry 11b, 12b (see FIG. 2) to one another creates a tangential air inlet slot 11a, 12a on both sides, in a mirror-image arrangement, through which a combustion mixture 15 is formed in one of the partial shells 11, 12 Interior 20 of the premix burner 1 flows.
- the configuration of these air inlet slots 11a, 12a is discussed in more detail below.
- the shells 11, 12 mentioned are cylindrical in the direction of flow.
- the flow cross section formed by the interior 20 can, however, be designed to decrease or increase in the flow direction, depending on the application, regularly or irregularly.
- a flow cross-section of the interior 20 designed as a venturi tube in the flow direction is to serve as an example here.
- the design options mentioned are not shown in any more detail, since they are readily apparent to the person skilled in the art.
- Arranged in the interior 20 is a conical inner body 13, which tapers in the direction of flow, extends far into the interior 20 and largely tapers out.
- the conical configuration of this inner body 13 is not limited to the shape shown: An outer shape of this inner body 13 as a diffuser or confuser is also possible.
- the inner body 13 is traversed by at least one bore 14, through which a liquid fuel 16 is preferably directed into the front area.
- the injection of the liquid fuel 16 in the area of the tip of the inner body 13 forms the head stage of the premix burner 1.
- the inner body 13 can easily be supplemented with a swirl generator, not shown in the figure, which supports the mixing of the injected fuel 16.
- the flow cross-section of the interior 20 experiences a cross-sectional jump via a front wall 17, the cross-section of which then forms the flow cross-section of the flame tube 21.
- the front wall 17 itself has a number of bores through which dilution air or cooling air 19 is fed to the front area of the combustion chamber 22 as required.
- the combustion mixture 15 consists of air and fuel (see FIG. 2).
- the combustion mixture 15 can also contain portions of a recirculated exhaust gas or an amount of steam. It generally applies that within the cross-sectional jump in the area of the front wall 17 a flow-like edge zone is formed, in which vortex detachments occur due to the negative pressure prevailing there, which in turn support flame stabilization.
- the previously mentioned dilution air or cold air 19 is admixed.
- the combustion mixture 15 flowing tangentially into the interior 20 creates a swirl of the medium around the inner body 13.
- a vortex burst occurs, a homogeneous fuel concentration depending on the formation of the tangential air inlet slots or on the installation of vortex generators in the area of the air inlet slots.
- the ignition takes place at the top of the return flow zone 18: only at this point can a stable flame front arise.
- a backlash of the flame into the interior 20 of the premix burner 1, as is always latent in the case of the premixing sections which have become known, while remedial action is sought there with complicated flame holders is not to be feared here for the reasons mentioned.
- combustion air is additionally preheated or enriched with one of the media mentioned, this supports the evaporation of the liquid fuel 16 brought in through the inner body 13.
- the inner body 13 With designing the inner body 13 with regard to the conical configuration and the width of the tangential air inlet slots 11a, 12a, there are narrow limits to be observed so that the desired flow field, ie the critical swirl number, of the combustion mixture 15 can be set at the outlet of the interior 20.
- the axial speed of the combustion mixture 15 within the interior 20 of the premix burner 1 can be changed by supplying an axial combustion air flow (not shown in more detail).
- the design of the premix burner 1 is furthermore excellently suitable for changing the size of the tangential air inlet slots 11a, 12a, so that a relatively large operating bandwidth can be recorded without changing the overall length of the premix burner 1.
- Fig. 2 shows the configuration of the nested Partial shells 11, 12.
- the partial shells 11, 12 can also be moved relative to one another via this plane, i.e. it is readily possible to overlap them in the Area of the tangential air inlet slots 11a, 12a accomplish.
- the tangential Air inlet slots 11a, 12a each form the outlet opening a feed channel 11c, 12c, in which detached from the interior 20, the combustion mixture 15 is formed before it flows into this interior 20.
- the feed channels 11c, 12c In enough Distance upstream of the tangential air inlet slots 11a, 12a, the feed channels 11c, 12c have vortex generators 11d, 12d on the air flowing in there 23 swirl integrally. At a reasonable distance downstream this vortex generator 11d, 12d, the injection of one is preferred gaseous fuel 24 made, with what then along the remaining route of the feed channels 11c, 12c can form the desired air / fuel mixture before this as a combustion mixture 15 in integrally the same Consistency over the entire length of the tangential air inlet slots 11a, 12a flows into the interior 20.
- the feed channels 11c, 12c shown have a largely cylindrical shape, its length and flow cross-section designed for optimal air / fuel premixing are.
- the one to be formed within the feed channels 11c, 12c Flow must be designed so that from the interior 20, if the flame front becomes unstable, There is no risk of reignition: due to the arrangement shown the vortex generator 11d, 12d opposite the fuel injection 24 there is no risk of reignition. On the transfer the central axes 11b, 12b have already been shown in FIG. 1 discussed in more detail.
- FIG. 3 shows, in contrast to FIG. 2, feed channels, which are at a reasonable distance from the tangential air inlet slots 11a, 12a have a venturi mixer 25a, 25b.
- the fuel injection 24 is at the narrowest point performed. There is also the greatest speed which ensures the best possible mixture formation is, again with the exclusion of a risk of reignition. Otherwise, the structure of FIG. 3 corresponds to that of Fig. 2.
- Fig. 4 largely corresponds to Fig. 1, here the inner body 13 expanded centrally with a stream of supporting air 26 which is a further measure to create the critical Swirl number in the right place.
- the number of shells are not on two limited. A larger number can be used without further ado. Becomes a spiral inlet of the combustion mixture 15 sought in the interior 20, this can be done easily through a single tangential air inlet slot to reach.
- Consists of the premix burner to be formed by the shells a connected pipe, so the tangential Injection into the interior through duct-like bushings through the wall thickness of this pipe.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
- Combustion Of Fluid Fuel (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19545026A DE19545026A1 (de) | 1995-12-02 | 1995-12-02 | Vormischbrenner |
DE19545026 | 1995-12-02 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0777081A2 EP0777081A2 (de) | 1997-06-04 |
EP0777081A3 EP0777081A3 (de) | 1998-10-21 |
EP0777081B1 true EP0777081B1 (de) | 2003-03-05 |
Family
ID=7779042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96810738A Expired - Lifetime EP0777081B1 (de) | 1995-12-02 | 1996-11-06 | Vormischbrenner |
Country Status (4)
Country | Link |
---|---|
US (1) | US5791894A (ja) |
EP (1) | EP0777081B1 (ja) |
JP (1) | JP3828969B2 (ja) |
DE (2) | DE19545026A1 (ja) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19640198A1 (de) * | 1996-09-30 | 1998-04-02 | Abb Research Ltd | Vormischbrenner |
US6178752B1 (en) * | 1998-03-24 | 2001-01-30 | United Technologies Corporation | Durability flame stabilizing fuel injector with impingement and transpiration cooled tip |
US6141954A (en) * | 1998-05-18 | 2000-11-07 | United Technologies Corporation | Premixing fuel injector with improved flame disgorgement capacity |
CA2383833C (en) * | 1999-09-06 | 2009-04-14 | Shell Internationale Research Maatschappij B.V. | Mixing device |
EP1292795B1 (de) * | 2000-06-15 | 2005-05-04 | ALSTOM Technology Ltd | Verfahren zum betrieb eines brenners mit gestufter vormischgas-eindüsung |
DE10029607A1 (de) * | 2000-06-15 | 2001-12-20 | Alstom Power Nv | Brenner mit gestufter Vormischgas-Eindüsung |
DE10050248A1 (de) | 2000-10-11 | 2002-04-18 | Alstom Switzerland Ltd | Brenner |
US7721726B2 (en) | 2006-01-03 | 2010-05-25 | Lg Electronics Inc. | Gas radiation burner |
KR100765283B1 (ko) * | 2006-01-06 | 2007-10-09 | 엘지전자 주식회사 | 가스복사 버너 |
US7717105B2 (en) | 2006-01-06 | 2010-05-18 | Lg Electronics Inc. | Gas radiation burner |
KR100751417B1 (ko) * | 2006-01-20 | 2007-08-23 | 엘지전자 주식회사 | 가스 버너 및 이를 이용한 히팅장치 |
US7520272B2 (en) * | 2006-01-24 | 2009-04-21 | General Electric Company | Fuel injector |
KR100793758B1 (ko) * | 2007-02-06 | 2008-01-10 | 엘지전자 주식회사 | 가스복사 버너 |
EP2220433B1 (de) | 2007-11-27 | 2013-09-04 | Alstom Technology Ltd | Verfahren und vorrichtung zur verbrennung von wasserstoff in einem vormischbrenner |
WO2009109448A1 (de) * | 2008-03-07 | 2009-09-11 | Alstom Technology Ltd | Brenneranordnung sowie anwendung einer solchen brenner-anordnung |
EP2252831B1 (de) | 2008-03-07 | 2013-05-08 | Alstom Technology Ltd | Brenneranordnung sowie anwendung einer solchen brenner-anordnung |
WO2009109454A1 (de) | 2008-03-07 | 2009-09-11 | Alstom Technology Ltd | Verfahren und brenneranordnung zum erzeugen von heissgas sowie anwendung des verfahrens |
US20110005189A1 (en) * | 2009-07-08 | 2011-01-13 | General Electric Company | Active Control of Flame Holding and Flashback in Turbine Combustor Fuel Nozzle |
KR101301729B1 (ko) * | 2010-08-11 | 2013-09-09 | (주)오선텍 | 개질기용 버너 |
JP5507422B2 (ja) * | 2010-11-16 | 2014-05-28 | 大阪瓦斯株式会社 | 予混合管状火炎バーナ |
JP5370465B2 (ja) * | 2011-11-18 | 2013-12-18 | Jfeスチール株式会社 | 長火炎バーナおよびラジアントチューブ式加熱装置 |
KR20160045737A (ko) * | 2013-08-07 | 2016-04-27 | 아벤고아 하이드로게노, 에스.에이. | 탄화수소 및 알코올 개질 시스템 용 버너, 상기 버너를 포함하는 탄화수소 및 알코올 개질 시스템 및 관련 방법 |
JP6602004B2 (ja) * | 2014-09-29 | 2019-11-06 | 川崎重工業株式会社 | 燃料噴射器及びガスタービン |
EP3133342A1 (en) * | 2015-08-20 | 2017-02-22 | Siemens Aktiengesellschaft | A premixed dual fuel burner with a tapering injection component for main liquid fuel |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE413283C (de) * | 1925-05-05 | Faconeisen Walzwerk L Mannstae | Gasfeuerung fuer Dampfkessel und Drehtrommeln | |
JPH01302015A (ja) * | 1988-05-30 | 1989-12-06 | Matsushita Electric Ind Co Ltd | 燃焼装置 |
JP2772955B2 (ja) * | 1988-07-08 | 1998-07-09 | 株式会社日本ケミカル・プラント・コンサルタント | 燃焼器用の燃料混合器 |
CH680946A5 (ja) * | 1989-12-19 | 1992-12-15 | Asea Brown Boveri | |
US5307634A (en) | 1992-02-26 | 1994-05-03 | United Technologies Corporation | Premix gas nozzle |
CH687831A5 (de) * | 1993-04-08 | 1997-02-28 | Asea Brown Boveri | Vormischbrenner. |
DE4320212A1 (de) * | 1993-06-18 | 1994-12-22 | Abb Research Ltd | Feuerungsanlage |
US5351477A (en) * | 1993-12-21 | 1994-10-04 | General Electric Company | Dual fuel mixer for gas turbine combustor |
US5461865A (en) * | 1994-02-24 | 1995-10-31 | United Technologies Corporation | Tangential entry fuel nozzle |
-
1995
- 1995-12-02 DE DE19545026A patent/DE19545026A1/de not_active Withdrawn
-
1996
- 1996-11-06 EP EP96810738A patent/EP0777081B1/de not_active Expired - Lifetime
- 1996-11-06 DE DE59610190T patent/DE59610190D1/de not_active Expired - Lifetime
- 1996-11-12 US US08/747,569 patent/US5791894A/en not_active Expired - Lifetime
- 1996-12-02 JP JP32189996A patent/JP3828969B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0777081A3 (de) | 1998-10-21 |
EP0777081A2 (de) | 1997-06-04 |
JPH09178126A (ja) | 1997-07-11 |
JP3828969B2 (ja) | 2006-10-04 |
DE19545026A1 (de) | 1997-06-05 |
US5791894A (en) | 1998-08-11 |
DE59610190D1 (de) | 2003-04-10 |
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