EP1062461A1 - Combustion chamber and method for operating a combustion chamber - Google Patents
Combustion chamber and method for operating a combustion chamberInfo
- Publication number
- EP1062461A1 EP1062461A1 EP99913091A EP99913091A EP1062461A1 EP 1062461 A1 EP1062461 A1 EP 1062461A1 EP 99913091 A EP99913091 A EP 99913091A EP 99913091 A EP99913091 A EP 99913091A EP 1062461 A1 EP1062461 A1 EP 1062461A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion chamber
- combustion
- heat shield
- burner
- 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.)
- Granted
Links
Classifications
-
- 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
- F23D14/12—Radiant burners
- F23D14/16—Radiant burners using permeable blocks
-
- 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
- F23R3/002—Wall structures
-
- 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
- F23R3/007—Continuous combustion chambers using liquid or gaseous fuel constructed mainly of ceramic components
-
- 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
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
-
- 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
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/34—Feeding into different combustion zones
- F23R3/346—Feeding into different combustion zones for staged combustion
Definitions
- the invention relates to a combustion chamber with a combustion chamber wall and with an inner lining formed from a multiplicity of heat shield elements, and to a method for operating a combustion chamber.
- EP 0 597 137 B1 describes an annular combustion chamber for a gas turbine.
- the combustion chamber is divided into a primary zone and a secondary zone.
- the primary zone and the secondary zone each have a flow-limiting wall, which are cooled independently of one another by cooling air.
- the wall of the secondary zone is double-walled. It connects to the wall of the primary zone, which is formed by a segment support for segments of a refractory lining.
- the cooling air first flows through the double-walled wall of the secondary zone, then flows through the segment carrier and the segments of the
- EP 0 576 697 B1 describes a combustion chamber of a gas turbine in which, in addition to classic burner types, catalytic burners are also used. Premix burners are used as classic burner types, with which the main combustion is carried out. The combination of these burner types results in a simpler regulation in the event of changing load states of the gas turbine.
- the object of the invention is to provide a combustion chamber which enables the supply of fuel and combustion air in a particularly simple construction.
- Another object of the invention is to provide a method for operating a combustion chamber by means of which a staged combustion is made possible in a particularly simple manner.
- the task aimed at specifying a combustion chamber is achieved by a combustion chamber with a combustion chamber wall and with an inner lining formed from a multiplicity of heat shield elements, at least one heat shield element functioning as a burner being a burner heat shield element st to which a fuel supply for supplying fuel and a combustion air supply for the supply of combustion air are connected upstream.
- a heat shield element which is part of the fireproof inner lining of the combustion chamber, is used as the burner.
- a burner heat shield element is supplied with fuel and combustion air and either discharged into the combustion chamber or burned directly in or on the heat shield element.
- a premixing chamber, into which the fuel and the combustion air can be introduced, is preferably connected upstream of the burner heat shield element. Fuel and combustion air are only fed into the premixing room, where there is a fuel-air mixture 3 is formed. This fuel-air mixture is then fed to the burner heat shield element. This results in a homogeneous fuel-air mixture that is favorable for combustion.
- the combustion chamber has an outer side, along which a fuel line preferably extends, from which fuel can be admitted into the premixing chamber.
- a fuel line could e.g. in the case of an annular combustion chamber, an annular line running around the combustion chamber wall in the circumferential direction of the annular combustion chamber, from which e.g. fuel can also be supplied in a simple manner for a plurality of burner heat shield elements which are arranged along this circumferential direction.
- a combustible gas stream can preferably be passed through the combustion chamber along an expansion direction from an inlet side to an outlet side, at least one burner being provided for a first stage of combustion, and wherein a second stage of combustion can be generated by the burner heat shield element downstream of the first stage is.
- a second stage of a two-stage combustion is implemented in a simple manner via the burner heat shield element.
- further stages of combustion can also be provided.
- Due to the two-stage or multi-stage combustion a reaction zone of the combustion is distributed over a larger volume. This results in a lower tendency to form combustion vibrations in the combustion chamber. Such combustion vibrations can cause considerable damage to the combustion chamber.
- the use of at least two burners results in a wide parameter range for controlling the combustion.
- the fuel supply to the burner heat shield element can be omitted, so that only air flows into the combustion chamber through the burner heat shield element.
- the use of the burner heat shield element results in an improved cooling capacity for cooling the inner lining of the combustion chamber, since a comparatively large amount of cooling combustion air can be fed to the burner heat shield element.
- another advantage is that the air mass flow through the first stage burner can be reduced. This has the particular consequence that the burner can be made smaller. This has the advantage, for example, that the burner can be removed in a simpler manner from a housing surrounding it.
- the burner heat shield element extends along the
- the premixing chamber is preferably located between the combustion chamber wall and the burner heat shield element, and an outlet opening is provided in the region of the second end, which connects the premixing chamber to the combustion chamber.
- the arrangement of the premixing chamber and the outlet opening arranged downstream result in a flow-related connection of the premixing chamber to the combustion chamber, which is distinguished by a particularly low flow resistance.
- Cooling air can preferably be supplied to the burner heat shield element, the cooling air being simultaneously usable as combustion air.
- the heat shield elements are frequently cooled in that cooling air is led from the outside of the combustion chamber wall, for example through bores to the rear of the heat shield elements.
- the burner heat shield element preferably has a material provided with numerous cavities, the fuel and the combustion air being able to be supplied in such a way that combustion can be generated within this material.
- a burner heat shield element represents a so-called pore burner. Fuel and combustion air are therefore burned in the cavities or pores, the material heating up. On the one hand, this leads to a good stabilization of the combustion. On the other hand, the pore structure has a strong damping effect on combustion vibrations.
- the advantage of the lower flame temperature can also be used to supply more fuel to the burner heat shield element and therefore less fuel to the burner of a first stage. This reduces the formation of such combustion vibrations, which can be caused by the burner of the first stage.
- the material is preferably a foamed ceramic, in particular zirconium oxide or silicon carbide.
- Such materials are e.g. B. can be produced in that the ceramic is introduced into a foam-forming support material and, after foaming and curing has taken place, the support material is etched away, so that a porous ceramic remains.
- the combustion chamber is preferably designed as an annular combustion chamber forming an annular space, a plurality of heat shield elements being designed as burner heat shield elements along a circumferential direction of the annular space. Most of the heat shield elements arranged along a circumferential direction are preferably designed as burner heat shield elements. This results in a uniform distribution of the second stage of combustion over the circumference of the annular combustion chamber.
- the combustion chamber is preferably used in a gas turbine, in particular in a stationary gas turbine.
- the gas turbine preferably has an output greater than 60 MW.
- the object of specifying a method is achieved by a method for operating a combustion chamber with a combustion chamber wall and with an inner lining formed from a multiplicity of heat shield elements, at least one of the heat shield elements being supplied with fuel and combustion air for combustion in the combustion chamber.
- the fuel and the combustion air are preferably first mixed, then fed to the heat shield element, then discharged into the combustion chamber and burned there.
- the fuel and the combustion air are more preferably burned within a porous structure of the heat shield element.
- a first stage of a combustion preferably takes place first, with a second stage of the combustion then taking place via the heat shield element. 7
- the method is further preferably carried out in a combustion chamber, in particular in an annular combustion chamber, of a gas turbine.
- FIG. 1 shows a longitudinal section through an annular combustion chamber of a gas turbine
- FIG. 4 shows a burner heat shield element made of a porous material.
- FIG 1 shows a longitudinal section through an annular combustion chamber 1 for a gas turbine.
- the annular combustion chamber 1 is rotationally symmetrical about an axis 2. For the sake of clarity, only one half of the longitudinal section is shown.
- the annular combustion chamber 1 has a combustion chamber wall 3.
- the combustion chamber wall 3 encloses an annular space 4.
- the inner wall of the combustion chamber wall 3 is lined with an inner lining 5.
- the inner lining 5 is formed by a multiplicity of heat shield elements 6.
- heat shield elements 6 consist, for example, of refractory ceramic.
- a burner system 7 opens into the annular combustion chamber 1. This is formed by a diffusion burner 8 and a premix burner 9, which surrounds the diffusion burner 8 in the form of an annular channel.
- the burner system 7 is arranged on an end 11 of the annular combustion chamber 1 on the burner side.
- At an end 11 opposite the burner side Above the turbine-side end 13 is a gas turbine 15 shown schematically.
- fuel 17A is supplied to the pilot burner 8.
- Combustion air 18A is also supplied to the pilot burner 8.
- the fuel 17A and the combustion air 18A are burned via a diffusion operation of the pilot burner 8 in the annular space 4 of the annular combustion chamber 1.
- a mixture of fuel 17B and combustion air 18B ignites at the flame of this combustion stabilized on the pilot burner 8 and is fed to the premix burner 9.
- the exhaust gas 20 generated by the combustion emerges from the turbine-side end 13 of the annular combustion chamber 1 and drives the gas turbine 15.
- FIG. 2 shows a section of a longitudinal section corresponding to FIG. 1 through an annular combustion chamber 1.
- One of the heat shield elements 6 is designed as a burner heat shield element 22.
- the burner heat shield element 22 is screwed onto the combustion chamber wall 3 with a screw 24.
- 22 through holes 26 are provided in the combustion chamber wall 3 behind the burner heat shield element.
- On the outside 28 of the Brennka merwand 3, a fuel line 30 is also provided.
- a through bore 32 of the combustion chamber wall 3 leads from the fuel line 30 to a premixing chamber 34, which is formed by the burner heat shield element 22 abutting the combustion chamber wall 3.
- the through holes 26 also open into the premixing chamber 34.
- the burner heat shield element 22 extends from a first end 23 to a second end 25. 9
- the burner heat shield element 22 is now used in the following manner for a second stage of combustion in the annular combustion chamber 1:
- Fuel 36 preferably natural gas
- combustion air 38 is fed to the premixing chamber 34 via the through holes 26.
- the natural gas 36 mixes with the combustion air 38.
- an outlet opening 40 is provided, which discharges the natural gas-air mixture 42 into the annular combustion chamber 1.
- the natural gas-air mixture 42 ignites in the hot annular combustion chamber 1. This forms a second stage of combustion. With this second stage, the reaction zone of the combustion taking place in the annular combustion chamber 1 is enlarged. This leads to a reduced tendency to form combustion vibrations.
- the considerable combustion air flow 38 also leads to a high cooling capacity for the burner heat shield element 22 and also for the further heat shield elements 6 located downstream of the burner heat shield element 22.
- FIG. 3 again shows an enlarged and schematic illustration of a burner heat shield element 22 arranged on the burner chamber wall 3.
- the corresponding explanations apply as for FIG. 2.
- the burner heat shield element 22 is formed from a porous material 44. It is fastened to the combustion chamber wall 3 with clips 46.
- a wall 48 is provided opposite the burner heat shield element 22 which surrounds the premixing chamber 34.
- a fuel line 30 is integrated into the wall 48. Openings 50 are also provided in the wall 48. 10 seen.
- the premixing chamber 34 is connected in terms of flow technology to the burner heat shield element 22 through perforations 26 in the combustion chamber wall 3.
- Combustion air 38 enters the premixing chamber 34 via the openings 50.
- Fuel preferably natural gas, also arrives in the premixing chamber 34 from the fuel line 30.
- the fuel-air mixture 42 passes from the premixing chamber 34 into the burner heat shield via the perforations 26. element 22.
- the fuel-air mixture 42 penetrates into the porous material 44.
- the heat in a combustion chamber ignites the fuel-air mixture 42 and burns within the pores of the porous material 44.
- the porous material 44 heats up. This leads to a particularly stable combustion.
- a combustion oscillation is suppressed by the pore structure of the porous material 44.
- the porous material 44 radiates heat. As a result, the flame temperature of the combustion within the porous material 44 is comparatively low. This in turn means that fewer nitrogen oxides are formed.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19810276 | 1998-03-10 | ||
DE19810276 | 1998-03-10 | ||
PCT/DE1999/000513 WO1999046540A1 (en) | 1998-03-10 | 1999-02-25 | Combustion chamber and method for operating a combustion chamber |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1062461A1 true EP1062461A1 (en) | 2000-12-27 |
EP1062461B1 EP1062461B1 (en) | 2003-12-03 |
Family
ID=7860355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99913091A Expired - Lifetime EP1062461B1 (en) | 1998-03-10 | 1999-02-25 | Combustion chamber and method for operating a combustion chamber |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1062461B1 (en) |
JP (1) | JP4365027B2 (en) |
DE (1) | DE59907940D1 (en) |
WO (1) | WO1999046540A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018202407A1 (en) * | 2017-05-04 | 2018-11-08 | Siemens Aktiengesellschaft | Combustion chamber |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4524902B2 (en) * | 2000-10-25 | 2010-08-18 | 株式会社Ihi | Low NOx combustor with premixed fuel injection valve |
EP1286112A1 (en) | 2001-08-09 | 2003-02-26 | Siemens Aktiengesellschaft | Premix burner and method of operating the same |
EP1460339A1 (en) * | 2003-03-21 | 2004-09-22 | Siemens Aktiengesellschaft | Gas turbine |
ATE483138T1 (en) * | 2004-01-21 | 2010-10-15 | Siemens Ag | BURNER WITH COOLED COMPONENT, GAS TURBINE AND METHOD FOR COOLING THE COMPONENT |
EP1847684A1 (en) | 2006-04-21 | 2007-10-24 | Siemens Aktiengesellschaft | Turbine blade |
EP1847696A1 (en) * | 2006-04-21 | 2007-10-24 | Siemens Aktiengesellschaft | Component for a secondary combustion system in a gas turbine and corresponding gas turbine. |
US8800293B2 (en) * | 2007-07-10 | 2014-08-12 | United Technologies Corporation | Floatwell panel assemblies and related systems |
EP2161500A1 (en) | 2008-09-04 | 2010-03-10 | Siemens Aktiengesellschaft | Combustor system and method of reducing combustion instability and/or emissions of a combustor system |
WO2019172925A2 (en) * | 2018-03-09 | 2019-09-12 | Siemens Aktiengesellschaft | Finely distributed combustion system for a gas turbine engine |
US11156164B2 (en) | 2019-05-21 | 2021-10-26 | General Electric Company | System and method for high frequency accoustic dampers with caps |
US11174792B2 (en) | 2019-05-21 | 2021-11-16 | General Electric Company | System and method for high frequency acoustic dampers with baffles |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE253189C (en) * | ||||
BE790956A (en) * | 1971-11-05 | 1973-03-01 | Penny Robert N | FLAME TUBE FOR AGAZ TURBINE ENGINE COMBUSTION CHAMBER |
US3981675A (en) * | 1974-12-19 | 1976-09-21 | United Technologies Corporation | Ceramic burner construction |
US4112676A (en) * | 1977-04-05 | 1978-09-12 | Westinghouse Electric Corp. | Hybrid combustor with staged injection of pre-mixed fuel |
US4910957A (en) * | 1988-07-13 | 1990-03-27 | Prutech Ii | Staged lean premix low nox hot wall gas turbine combustor with improved turndown capability |
FR2647534B1 (en) * | 1989-05-29 | 1991-09-13 | Europ Propulsion | REACTOR CHAMBER AND METHOD FOR THE PRODUCTION THEREOF |
DE59208831D1 (en) | 1992-06-29 | 1997-10-02 | Abb Research Ltd | Combustion chamber of a gas turbine |
EP0597137B1 (en) | 1992-11-09 | 1997-07-16 | Asea Brown Boveri AG | Combustion chamber for gas turbine |
JP3404981B2 (en) * | 1995-04-21 | 2003-05-12 | 日本鋼管株式会社 | Gas heating device |
-
1999
- 1999-02-25 JP JP2000535877A patent/JP4365027B2/en not_active Expired - Fee Related
- 1999-02-25 WO PCT/DE1999/000513 patent/WO1999046540A1/en active IP Right Grant
- 1999-02-25 EP EP99913091A patent/EP1062461B1/en not_active Expired - Lifetime
- 1999-02-25 DE DE59907940T patent/DE59907940D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9946540A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018202407A1 (en) * | 2017-05-04 | 2018-11-08 | Siemens Aktiengesellschaft | Combustion chamber |
Also Published As
Publication number | Publication date |
---|---|
JP4365027B2 (en) | 2009-11-18 |
DE59907940D1 (en) | 2004-01-15 |
WO1999046540A1 (en) | 1999-09-16 |
EP1062461B1 (en) | 2003-12-03 |
JP2002506193A (en) | 2002-02-26 |
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