US20090139235A1 - Catalytically Stabilized Gas Turbine Combustor - Google Patents
Catalytically Stabilized Gas Turbine Combustor Download PDFInfo
- Publication number
- US20090139235A1 US20090139235A1 US11/949,069 US94906907A US2009139235A1 US 20090139235 A1 US20090139235 A1 US 20090139235A1 US 94906907 A US94906907 A US 94906907A US 2009139235 A1 US2009139235 A1 US 2009139235A1
- Authority
- US
- United States
- Prior art keywords
- gas turbine
- turbine combustor
- combustion
- nozzle
- combustion nozzle
- 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.)
- Abandoned
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Classifications
-
- 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
- F23R3/40—Continuous combustion chambers using liquid or gaseous fuel characterised by the use of catalytic means
-
- 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
- F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
- F23C13/04—Apparatus in which combustion takes place in the presence of catalytic material characterised by arrangements of two or more catalytic elements in series connection
-
- 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
- F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
- F23C13/06—Apparatus in which combustion takes place in the presence of catalytic material in which non-catalytic combustion takes place in addition to catalytic combustion, e.g. downstream of a catalytic element
-
- 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
- F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
- F23C13/08—Apparatus in which combustion takes place in the presence of catalytic material characterised by the catalytic material
Definitions
- the present application further provides for operating a gas turbine combustor with a central combustion nozzle and a number of outer combustion nozzles.
- the method includes the steps of positioning a catalyst within the central combustion nozzle and modulating a fuel-air mixture exiting the central combustion nozzle to a temperature range of about 1000 to about 1500 degrees Fahrenheit (about 538 to about 816 degrees Celsius).
- High temperature metal alloys are preferred, particularly alloys composed of iron, nickel, and/or cobalt, in combination with aluminum, chromium, and/or other alloying materials.
- High temperature nickel alloys are especially preferred.
- Other materials that may be used include ceramics, metal oxides, intermetallic materials, carbides, and nitrides.
- Metallic substrates are most preferred due to their excellent thermal conductivity, allowing effective backside cooling of the catalyst layer 250 . Other materials and configurations may be used herein.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
Abstract
A gas turbine combustor. The gas turbine combustor may include a central combustion nozzle with a catalyst therein and a number of outer combustion nozzles surrounding the central combustion nozzle.
Description
- The present application relates generally to gas turbine engines and more particularly relates to a combustor for a gas turbine that is catalytically stabilized.
- At temperatures above about 2800 degrees Fahrenheit (about 1538 degrees Celsius), the oxygen and nitrogen present in the air combine to form nitrogen oxides (NO and NO2, collectively known as NOx.) As a result, modem low emission gas turbines generally use a very lean, premixed flame for low NOx combustion. Operational boundaries include “Lean Blow Out” (“LBO”), which may result in a partial or a complete blowout of the flame in one or more combustors. Another boundary is acoustic pressure oscillations or combustion dynamics. These combustion dynamics may influence the operability or durability of the combustion system as a whole. As a result, it may be necessary to tune individually each gas turbine to remain operational while still satisfying emissions controls. Tuning, however, can influence not only the time required for commissioning, but also may be needed to address ambient or load variations.
- Both the LBO and combustion dynamics boundaries can be influenced by providing a stable anchoring flame for the combustor. In older low NOx combustors, this anchoring flame may be provided by a piloting diffusion flame. This type of pilot, however, may cause NOx emissions to be higher than desired or permitted. Specifically, the use of a diffusion pilot makes it difficult to reach the desired single digit NOx emissions in modem gas turbines with high firing temperatures.
- Thus, there is a desire for a more stable anchoring flame for low NOx combustors. Such a stable anchoring flame should reduce blow out tendency, increased hot section life, relax tuning requirements, and enhance the low NOx operating range.
- The present application thus provides a combustor for a gas turbine. The gas turbine combustor may include a central combustion nozzle with a catalyst therein and a number of outer combustion nozzles surrounding the central combustion nozzle.
- The present application further provides for operating a gas turbine combustor with a central combustion nozzle and a number of outer combustion nozzles. The method includes the steps of positioning a catalyst within the central combustion nozzle and modulating a fuel-air mixture exiting the central combustion nozzle to a temperature range of about 1000 to about 1500 degrees Fahrenheit (about 538 to about 816 degrees Celsius).
- The present application further provides for a gas turbine combustor. The gas turbine combustor may include a catalytic combustion nozzle with a catalyst therein and a number of non-catalytic combustion nozzles positioned about the catalytic combustion nozzle.
- These and other features of the present application will become apparent to one of ordinary skill in the art upon review of the following detailed description when taken in conjunction with the several drawings and the appended claims.
-
FIG. 1 is a side cross-section view of a gas turbine engine showing portions of a combustor, a compressor, and a turbine. -
FIG. 2 is a front plan view of a dry low NOx combustor as is described herein. -
FIG. 3 is a side cross-sectional view of a catalytic combustor as is described herein. - Referring now to the drawings, in which like numerals refer to like elements throughout the several views,
FIG. 1 shows a portion of agas turbine engine 100. Generally described, thegas turbine engine 100 includes acompressor 110. Thecompressor 110 compresses an incoming airflow. The airflow is then discharged to acombustor 120. Thecombustor 120 includes a number ofcombustion cans 130. The compressed air and fuel are ignited in thecombustion cans 130 and used to drive aturbine section 140. In theturbine section 140, the energy of the hot combustion gases is converted into mechanical work. Some of the work is used to drive thecompressor 110 via ashaft 150 with the remainder being available to drive a load such as a generator. By way of example, thegas turbine engine 100 may be a 7FA+e utility gas turbine engine available from General Electric Company of Schenectady, N.Y. Other types ofgas turbine engines 100 with acombustor 120 may be used herein. - The
combustor 120 may be a dry low NOx (“DLN”) combustor also available from General Electric Company of Schenectady, N.Y. Specifically, thecombustor 120 may be known as a DLN 2.6 combustor. As is shown inFIG. 2 , a DLN 2.6combustor 160 includes afirst nozzle 170 and five (5) surrounding outer nozzles, asecond nozzle 180, athird nozzle 190, afourth nozzle 200, afifth nozzle 210, and asixth nozzle 220. Any number of nozzles may be used herein. Thefirst nozzle 170 may be fueled separately from the outer nozzles 180-220. Thefirst nozzle 170 therefore may have aseparate manifold 175 as compared to the outer nozzles 180-220. The fuel-air ratio of thefirst nozzle 170 thus can be modulated relative to the outer nozzles 180-220. The outer nozzles 180-200 may be identical with thefirst nozzle 170 being similar but with a simplified geometry so as to fit within the available space. Emission goals of about nine (9) ppm NOx and CO over about a fifty percent (50%) load range may be possible. Other types and configurations ofcombustors 160 may be used herein. -
FIG. 3 shows acatalytic combustor 230 as is described herein. Thecatalytic combustor 230 may be largely identical to the DLN 2.6combustor 160 described above but with thefirst nozzle 170 replaced with acatalytic nozzle 240. Thecatalytic nozzle 240 may include one or morecatalyst layers 250 positioned therein. Other configurations of thecatalytic combustor 230 and thecatalytic nozzle 240 may be used herein. - The
catalyst layer 250 may include as an active ingredient precious metals, Group VIII noble metals, base metals, metal oxides, or any combination thereof. Elements such as zirconium, vanadium, chromium, manganese, copper, platinum, palladium, osmium, iridium, rhodium, cerium, lanthanum, other elements of the lanthanide series, cobalt, nickel, iron, and the like may be used. Thecatalyst layer 250 may be applied directly to a substrate or to an intermediate bond coat or washcoat composed of alumina, silica, zirconia, titania, magnesia, other refractory metal oxides, or any combination thereof. The catalyst-coated substrate may be fabricated from any of various high temperature materials. High temperature metal alloys are preferred, particularly alloys composed of iron, nickel, and/or cobalt, in combination with aluminum, chromium, and/or other alloying materials. High temperature nickel alloys are especially preferred. Other materials that may be used include ceramics, metal oxides, intermetallic materials, carbides, and nitrides. Metallic substrates are most preferred due to their excellent thermal conductivity, allowing effective backside cooling of thecatalyst layer 250. Other materials and configurations may be used herein. - The
catalytic nozzle 240 may be a nozzle sold under the designation “RCL” by Precision Combustion, Inc. of New Haven, Conn. Other types ofcatalytic nozzles 240 may be used herein. Only a fraction of the fuel may be reacted such that the internal temperature of thenozzle 240 may be kept within an acceptable range. A mixture of air, unreacted fuel, combustion products, and highly reactive partial combustion products may be injected by thenozzle 240 into a combustion stream. The mixture ideally would be in the temperature range of about 1000 to about 1500 degrees Fahrenheit (about 538 to about 816 degrees Celsius). When the stream fromcatalytic nozzle 240 is injected into the swirling mixture of fuel and air provided by the outer nozzles 180-220, this relatively hot, highly reactive gas stream should provide a stable anchor to the premix flame. The outer nozzles 180-220 thus may be modulated to a lower operating temperature. - The relatively low temperature of the partially reacted gases should produced very little NOx by the pilot flame. The gases from the
nozzle 240 are not intended to ignite the mixture within thecombustor 230 but only to provide a stable anchor for the flame once ignited. By providing this relatively low temperature anchor, operability may be improved and combustion dynamics reduced without adversely impacting NOx emissions. - Several or all of the outer nozzles 180-220 also may be replaced with the
catalytic nozzle 240. This replacement offers the possibility of obtaining significantly lower NOx emission levels beyond that achievable by conventional lean premix combustors. Any number or configuration ofcatalytic nozzles 240 may be used herein. - It should be apparent that the foregoing relates only to the preferred embodiments of the present application and that numerous changes and modifications may be made herein by one of ordinary skill in the art without departing from the general spirit and scope of the invention as defined by the following claims and the equivalents thereof.
Claims (19)
1. A gas turbine combustor, comprising:
a central combustion nozzle;
the central combustion nozzle comprising a catalyst therein; and
a plurality of outer combustion nozzles surrounding the central combustion nozzle.
2. The gas turbine combustor of claim 1 , wherein the plurality of outer combustion nozzles comprises five (5) combustion nozzles.
3. The gas turbine combustor of claim 1 , wherein the central combustion nozzle comprises a central combustion nozzle manifold.
4. The gas turbine combustor of claim 1 , wherein the catalyst comprises precious metals, Group VIII noble metals, base metals, metal oxides, or a combination thereof.
5. The gas turbine combustor of claim 1 , wherein the catalyst comprises zirconium, vanadium, chromium, manganese, copper, platinum, palladium, osmium, iridium, rhodium, cerium, lanthanum, other elements of the lanthanide series, cobalt, nickel, or iron.
6. The gas turbine combustor of claim 1 , wherein the central combustion nozzle comprises a combustion stream in a temperature range of about 1000 to about 1500 degrees Fahrenheit (about 538 to about 816 degrees Celsius).
7. The gas turbine combustor of claim 1 , wherein one or more of the plurality of outer combustion nozzles comprise a catalyst therein.
8. The gas turbine combustor of claim 1 , wherein the catalyst comprises one or more catalyst layers.
9. A method operating a gas turbine combustor with a central combustion nozzle and a plurality of outer combustion nozzles, comprising:
positioning a catalyst within the central combustion nozzle; and
modulating a fuel-air mixture exiting the central combustion nozzle to a temperature range of about 1000 to about 1500 degrees Fahrenheit (about 538 to about 816 degrees Celsius).
10. The method of claim 9 , further comprising modulating a fuel-air mixture exiting the plurality of outer combustion nozzles to a temperature less than about 1000 to about 1500 degrees Fahrenheit (about 538 to about 816 degrees Celsius).
11. The method of claim 9 , further comprising positioning a catalyst within one or more of the outer combustion nozzles.
12. A gas turbine combustor, comprising:
a catalytic combustion nozzle;
the catalytic combustion nozzle comprising a catalyst therein; and
a plurality of non-catalytic combustion nozzles positioned about the catalytic combustion nozzle.
13. The gas turbine combustor of claim 12 , wherein the catalytic combustion nozzle comprise a central combustion nozzle and wherein the plurality of non-catalytic combustion nozzles comprise a plurality of non-catalytic nozzles surrounding the central combustion nozzle.
14. The gas turbine combustor of claim 12 , wherein the catalytic combustion nozzle comprises a catalytic combustion nozzle manifold.
15. The gas turbine combustor of claim 12 , wherein the catalyst comprises precious metals, Group VIII noble metals, base metals, metal oxides, or a combination thereof.
16. The gas turbine combustor of claim 12 , wherein the catalyst comprises zirconium, vanadium, chromium, manganese, copper, platinum, palladium, osmium, iridium, rhodium, cerium, lanthanum, other elements of the lanthanide series, cobalt, nickel, or iron.
17. The gas turbine combustor of claim 12 , wherein the catalytic combustion nozzle comprises a combustion stream in a temperature range of about 1000 to about 1500 degrees Fahrenheit (about 538 to about 816 degrees Celsius).
18. The gas turbine combustor of claim 12 , further comprises a plurality of catalytic combustion nozzles.
19. The gas turbine combustor of claim 12 , wherein the catalyst comprises one or more catalyst layers.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/949,069 US20090139235A1 (en) | 2007-12-03 | 2007-12-03 | Catalytically Stabilized Gas Turbine Combustor |
DE102008037608A DE102008037608A1 (en) | 2007-12-03 | 2008-11-27 | Catalytically stabilized gas turbine burner |
JP2008303591A JP2009139084A (en) | 2007-12-03 | 2008-11-28 | Catalytically stabilized gas turbine combustor |
CH01872/08A CH698218A2 (en) | 2007-12-03 | 2008-12-01 | Catalytically stabilized gas turbine combustor. |
CNA2008101836547A CN101451718A (en) | 2007-12-03 | 2008-12-03 | Catalytically stabilized gas turbine combustor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/949,069 US20090139235A1 (en) | 2007-12-03 | 2007-12-03 | Catalytically Stabilized Gas Turbine Combustor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090139235A1 true US20090139235A1 (en) | 2009-06-04 |
Family
ID=40586022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/949,069 Abandoned US20090139235A1 (en) | 2007-12-03 | 2007-12-03 | Catalytically Stabilized Gas Turbine Combustor |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090139235A1 (en) |
JP (1) | JP2009139084A (en) |
CN (1) | CN101451718A (en) |
CH (1) | CH698218A2 (en) |
DE (1) | DE102008037608A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090223225A1 (en) * | 2006-12-19 | 2009-09-10 | Kraemer Gilbert O | Method and apparatus for controlling combustor operability |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2397222A1 (en) | 2010-06-17 | 2011-12-21 | Sachtleben Chemie GmbH | Titanium dioxide with an amount of ZrO2, method for its manufacture and use |
US9494086B2 (en) * | 2014-02-28 | 2016-11-15 | General Electric Company | Systems and methods for improved combined cycle control |
CN109000278A (en) * | 2018-06-04 | 2018-12-14 | 新奥能源动力科技(上海)有限公司 | Burner and gas turbine |
CN109000277A (en) * | 2018-06-04 | 2018-12-14 | 新奥能源动力科技(上海)有限公司 | Burner and gas turbine |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4432207A (en) * | 1981-08-06 | 1984-02-21 | General Electric Company | Modular catalytic combustion bed support system |
US5440872A (en) * | 1988-11-18 | 1995-08-15 | Pfefferle; William C. | Catalytic method |
US5924275A (en) * | 1995-08-08 | 1999-07-20 | General Electric Co. | Center burner in a multi-burner combustor |
US6339925B1 (en) * | 1998-11-02 | 2002-01-22 | General Electric Company | Hybrid catalytic combustor |
US6358040B1 (en) * | 2000-03-17 | 2002-03-19 | Precision Combustion, Inc. | Method and apparatus for a fuel-rich catalytic reactor |
US6748745B2 (en) * | 2001-09-15 | 2004-06-15 | Precision Combustion, Inc. | Main burner, method and apparatus |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2774557B2 (en) * | 1989-03-30 | 1998-07-09 | 財団法人電力中央研究所 | Combustor for catalytic combustion type gas turbine |
JP2004361035A (en) * | 2003-06-06 | 2004-12-24 | Mitsubishi Heavy Ind Ltd | Gas turbine combustor |
-
2007
- 2007-12-03 US US11/949,069 patent/US20090139235A1/en not_active Abandoned
-
2008
- 2008-11-27 DE DE102008037608A patent/DE102008037608A1/en not_active Withdrawn
- 2008-11-28 JP JP2008303591A patent/JP2009139084A/en not_active Withdrawn
- 2008-12-01 CH CH01872/08A patent/CH698218A2/en not_active Application Discontinuation
- 2008-12-03 CN CNA2008101836547A patent/CN101451718A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4432207A (en) * | 1981-08-06 | 1984-02-21 | General Electric Company | Modular catalytic combustion bed support system |
US5440872A (en) * | 1988-11-18 | 1995-08-15 | Pfefferle; William C. | Catalytic method |
US5924275A (en) * | 1995-08-08 | 1999-07-20 | General Electric Co. | Center burner in a multi-burner combustor |
US6339925B1 (en) * | 1998-11-02 | 2002-01-22 | General Electric Company | Hybrid catalytic combustor |
US6358040B1 (en) * | 2000-03-17 | 2002-03-19 | Precision Combustion, Inc. | Method and apparatus for a fuel-rich catalytic reactor |
US6394791B2 (en) * | 2000-03-17 | 2002-05-28 | Precision Combustion, Inc. | Method and apparatus for a fuel-rich catalytic reactor |
US6752623B2 (en) * | 2000-03-17 | 2004-06-22 | Precision Combustion, Inc. | Method and apparatus for a fuel-rich catalytic reactor |
US6748745B2 (en) * | 2001-09-15 | 2004-06-15 | Precision Combustion, Inc. | Main burner, method and apparatus |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090223225A1 (en) * | 2006-12-19 | 2009-09-10 | Kraemer Gilbert O | Method and apparatus for controlling combustor operability |
US7841180B2 (en) * | 2006-12-19 | 2010-11-30 | General Electric Company | Method and apparatus for controlling combustor operability |
Also Published As
Publication number | Publication date |
---|---|
CH698218A2 (en) | 2009-06-15 |
JP2009139084A (en) | 2009-06-25 |
CN101451718A (en) | 2009-06-10 |
DE102008037608A1 (en) | 2009-06-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GENERAL ELECTRIC COMPANY, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DAVIS, LEWIS BERKLEY, JR.;BALEVIC, DAVID JUSTIN;LIPINSKI, JOHN JOSEPH;REEL/FRAME:020184/0496;SIGNING DATES FROM 20071102 TO 20071130 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |