EP0863364A2 - Heat-recovery boiler provided with divergent duct - Google Patents
Heat-recovery boiler provided with divergent duct Download PDFInfo
- Publication number
- EP0863364A2 EP0863364A2 EP98200705A EP98200705A EP0863364A2 EP 0863364 A2 EP0863364 A2 EP 0863364A2 EP 98200705 A EP98200705 A EP 98200705A EP 98200705 A EP98200705 A EP 98200705A EP 0863364 A2 EP0863364 A2 EP 0863364A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- recovery boiler
- profiles
- divergent duct
- conveyance
- 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.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/30—Exhaust heads, chambers, or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
- F22B1/1815—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines using the exhaust gases of gas-turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/30—Arrangement of components
- F05D2250/32—Arrangement of components according to their shape
- F05D2250/324—Arrangement of components according to their shape divergent
Definitions
- the present invention relates to a heat-recovery boiler provided with a divergent duct between the outlet of a turbine and the inlet of a boiler.
- Boilers of the above type utilize the heat of the exhaust gases from the gas turbine, which are conveyed to the heat-recovery boiler by means of a so-called divergent duct.
- a so-called divergent duct which may be 15 to 20 m long, is provided between the outlet duct of the gas turbine, having a diameter of approximately 5 to 6 meters, and the heat-recovery boiler.
- this aim is achieved in that the covering wall of the divergent duct that runs from the top of the boiler to the top of the outlet of the gas turbine has an inclination which forms an angle ( ⁇ ) greater than 45° and up to 75° with respect to the horizontal plane, and that the inclined wall of the divergent duct is connected to the top of the outlet of the gas turbine through a wall which is shaped like an arc.
- aerodynamic profiles for conveying the gas stream are provided which are arranged in succession and in adjacent rows.
- the angle ( ⁇ ) assumes a value between 62° and 65°.
- burners which can be orientated and adapted with respect to the direction of flow of the hot gas stream inside the divergent duct and downstream of the aerodynamic profiles that are optionally present.
- the aerodynamic conveyance profiles have an arc-like configuration on their leading edge, and the part of the metal plates directed towards the inlet of the heat-recovery boiler is formed by converging conduction plates which cover an angle ( ⁇ ) of approximately 20°.
- the bottom wall of the divergent duct is inclined with respect to the horizontal plane.
- the metal plates of the aerodynamic profile have a concave/convex shape in order to efficiently open out the stream of hot gases directed towards the boiler.
- the outlet of a gas turbine is connected to the inlet 2 of a heat-recovery boiler, by using for this purpose a divergent duct, generally designated by the reference numeral 3.
- the divergent duct 3 is advantageously provided by means of a frame-like structure.
- the hot gases are fed from the outlet 1 of the turbine in the direction indicated by the arrow 102 in order to enter the heat-recovery boiler 2 in the direction indicated by the arrow 110.
- the bottom wall 6 is inclined with respect to the horizontal plane by an angle ( ⁇ ) of approximately 15° in order to join with the inlet of the heat-recovery boiler.
- the covering wall 7 has an angle ( ⁇ ) which is greater than 45° and up to 75°, preferably approximately 62-65° with respect to the horizontal plane 100.
- a portion 8 made of metal plate and having an arc-like shape is provided between the outlet 1 and the inclined covering wall 7.
- the radius of curvature R of the arc-shaped wall 8 corresponds to a value of 0.5-0.8 times the vertical dimension of the inlet of the divergent duct.
- the internal internal space 9 of the divergent duct 3 accommodates, proximate to the region formed by the arc-shaped plate 8, a plurality of aerodynamic conveyance profiles designated by the reference numeral 10.
- the aerodynamic conveyance profiles 10 that run through the internal space 9 are arranged along arc-shaped segments having the same center 101 as the radius of curvature that forms the profile of the arc-shaped plate 8.
- the aerodynamic profiles 10 are arranged in groups and sequentially along arc-like paths 103, 104, 105 and 106 whose radii increase from the center 101 in order to uniformly diffuse the stream of hot gases in the divergent duct.
- the aerodynamic conveyance profiles 10, which run lengthwise along the internal space 9, are supported by the walls 4 and 5 so as to allow an angular adjustment, allowing to adapt the angle of attack of the profile with respect to the stream, so as to achieve the different degrees of deflection of the hot fumes in the entire divergent duct.
- reheaters 20, 21, 22 and 23 Downstream of the aerodynamic profiles 10, inside the internal space 9, reheaters 20, 21, 22 and 23 are provided and, according to the invention, these burners can be adjusted angularly in an operating position, so that their flame is aligned with the lines of flow of the hot gas stream, as defined by the conveyance profiles 10.
- the burner 20 is arranged so that its centerline axis is at approximately 57° with respect to the horizontal plane, while the axis of the burner 21 is arranged at 45° with respect to the horizontal plane and the axis of the burner 22 is arranged at 31° with respect to the horizontal plane.
- the conveyance profiles 10 are composed of a tube 30 having a circular cross-section, the rounded part 31 whereof is directed towards the incoming gas stream, designated by the reference numeral 102.
- the remaining part of the tube 30 is covered by two conduction plates 32 and 33, the free ends whereof are joined at the point 34.
- the plates 32 and 33 are sized so as to cover an angle ( ⁇ ) of approximately 20°.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Incineration Of Waste (AREA)
- Paper (AREA)
Abstract
Description
Claims (10)
- A heat-recovery boiler provided with a divergent duct which runs from the outlet of a turbine to the inlet of a boiler, characterized in that the covering wall (7) of the divergent duct (3), which runs from the top of the boiler (2) to the top of the outlet of the gas turbine (1), is inclined at an angle (α) which is greater than 45° and up to 75° with respect to the horizontal plane (100), and in that the inclined wall (7) of the divergent duct (3) is connected to the top of the outlet (1) of the gas turbine by means of an arc-shaped wall (8).
- A heat-recovery boiler according to claim 1, characterized in that on the inside (9) of the divergent duct (3), in the region lying adjacent to the arc-shaped wall (8), aerodynamic gas stream conveyance profiles (10) are provided which are arranged in succession and in adjacent rows (103, 104, 105, 106).
- A heat-recovery boiler according to one or more of the preceding claims, characterized in that the angle (α) is between 62° and 65°.
- A heat-recovery boiler according to one or more of the preceding claims, characterized in that on the inside (9) of the divergent duct (3) and downstream of the sets of aerodynamic conveyance profiles (10) a plurality of burners (20, 21, 22, 23) is provided, and in that the burners (20, 21, 22, 23) are provided so that their angular position can be adjusted.
- A heat-recovery boiler according to one or more of the preceding claims, characterized in that the aerodynamic conveyance profiles (10) have an arc-like shape (30, 31), on the edge (102) first affected by the hot gas stream, and in that the wall of the plates (10) that is directed towards the inlet (110) of the heat-recovery boiler (2) is formed by converging conduction plates (32, 33) covering an angle (γ) of approximately 20°.
- A heat-recovery boiler according to one or more of the preceding claims, characterized in that the conveyance profiles (10) have a concave/convex shape for their edges (200, 201).
- A heat-recovery boiler according to one or more of the preceding claims, characterized in that the radius of curvature (R) of the arc-shaped wall (8) corresponds to a radius which is 0.5-0.8 times the height of the inlet of the divergent duct (3).
- A heat-recovery boiler according to one or more of the preceding claims, characterized in that the aerodynamic conveyance profiles (10) are arranged along arc-shaped segments (103, 104, 105, 106) which have a single center (101) for their radius of curvature (R) and in that the different paths (103, 104, 105, 106) have progressively greater curvature radii.
- A heat-recovery boiler according to one or more of the preceding claims, characterized in that the conveyance profiles (10) cross the internal space (9) of the divergent duct (3) along its width and in that the aerodynamic profiles (10) are supported by the walls (4, 5) so as to allow angular adjustment and orientation.
- A heat-recovery boiler according to one or more of the preceding claims, characterized in that the aerodynamic conveyance profiles (10) are composed of a tube (30) having a circular cross-section and the round part (31) whereof is directed towards the incoming gas stream (102), and in that the remaining part of the tube (30) is covered by two conducting plates (32, 33), whose free ends are joined and cover an angle (γ).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI970509 | 1997-03-07 | ||
ITMI970509 IT1290579B1 (en) | 1997-03-07 | 1997-03-07 | RECOVERY BOILER, WITH DIVERGENT CONDUCT. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0863364A2 true EP0863364A2 (en) | 1998-09-09 |
EP0863364A3 EP0863364A3 (en) | 1999-07-28 |
Family
ID=11376329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98200705A Withdrawn EP0863364A3 (en) | 1997-03-07 | 1998-03-06 | Heat-recovery boiler provided with divergent duct |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0863364A3 (en) |
IT (1) | IT1290579B1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2224101A1 (en) * | 2009-02-27 | 2010-09-01 | Siemens Aktiengesellschaft | Gas turbine |
EP2325559A1 (en) | 2009-11-19 | 2011-05-25 | NEM Power-Systems, Niederlassung Deutschland der NEM B.V. Niederlande | System for influencing an exhaust gas flow |
WO2011028356A3 (en) * | 2009-09-03 | 2011-07-21 | Alstom Technology Ltd. | Apparatus and method for close coupling of heat recovery steam generators with gas turbines |
US20120174586A1 (en) * | 2011-01-07 | 2012-07-12 | Braden Manufacturing, Llc | Duct with transition section for turbine exhaust |
US9291177B2 (en) | 2010-06-01 | 2016-03-22 | Esg Mbh | Duct having flow conducting surfaces |
WO2016209365A1 (en) * | 2015-06-22 | 2016-12-29 | Saudi Arabian Oil Company | Flow distribution device and method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5110560A (en) * | 1987-11-23 | 1992-05-05 | United Technologies Corporation | Convoluted diffuser |
US5431009A (en) * | 1993-12-21 | 1995-07-11 | Combustion Engineering, Inc. | Heat recovery steam generator inlet duct |
US5555718A (en) * | 1994-11-10 | 1996-09-17 | Combustion Engineering, Inc. | Method and apparatus for injecting reactant for catalytic reduction in a gas turbine combined cycle system |
US5642614A (en) * | 1993-12-30 | 1997-07-01 | Combustion Engineering, Inc. | Gas turbine combined cycle system |
-
1997
- 1997-03-07 IT ITMI970509 patent/IT1290579B1/en active IP Right Grant
-
1998
- 1998-03-06 EP EP98200705A patent/EP0863364A3/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5110560A (en) * | 1987-11-23 | 1992-05-05 | United Technologies Corporation | Convoluted diffuser |
US5431009A (en) * | 1993-12-21 | 1995-07-11 | Combustion Engineering, Inc. | Heat recovery steam generator inlet duct |
US5642614A (en) * | 1993-12-30 | 1997-07-01 | Combustion Engineering, Inc. | Gas turbine combined cycle system |
US5555718A (en) * | 1994-11-10 | 1996-09-17 | Combustion Engineering, Inc. | Method and apparatus for injecting reactant for catalytic reduction in a gas turbine combined cycle system |
Non-Patent Citations (1)
Title |
---|
BAUVER W P ET AL: "Gas turbine heat recovery steam generator system performance improvement through gas flow optimization" 6TH INTERNATIONAL CONFERENCE ON GAS TURBINES IN COGENERATION AND UTILITY INDUSTRIAL AND INDEPENDENT POWER GENERATION - 1992 ASME COGEN-TURBO;HOUSTON, TX, USA SEP 1-3 1992, vol. 7, 1992, pages 303-310, XP002103649 ASME Int Gas Turbine Inst Publ IGTI;American Society of Mechanical Engineers, International Gas Turbine Institute (Publication) IGTI 1992 Publ by ASME, New York, NY, USA * |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2224101A1 (en) * | 2009-02-27 | 2010-09-01 | Siemens Aktiengesellschaft | Gas turbine |
WO2011028356A3 (en) * | 2009-09-03 | 2011-07-21 | Alstom Technology Ltd. | Apparatus and method for close coupling of heat recovery steam generators with gas turbines |
RU2620309C2 (en) * | 2009-09-03 | 2017-05-24 | Дженерал Электрик Текнолоджи Гмбх | Device and method for heat recovery steam generator close conjunction with gas turbine |
US10001272B2 (en) | 2009-09-03 | 2018-06-19 | General Electric Technology Gmbh | Apparatus and method for close coupling of heat recovery steam generators with gas turbines |
EP2325559A1 (en) | 2009-11-19 | 2011-05-25 | NEM Power-Systems, Niederlassung Deutschland der NEM B.V. Niederlande | System for influencing an exhaust gas flow |
WO2011060935A1 (en) * | 2009-11-19 | 2011-05-26 | Nem Power-Systems | Assembly for influencing an exhaust gas flow |
US9291342B2 (en) | 2009-11-19 | 2016-03-22 | Nem Power-Systems | Arrangement for influencing an exhaust gas flow |
US9291177B2 (en) | 2010-06-01 | 2016-03-22 | Esg Mbh | Duct having flow conducting surfaces |
US20120174586A1 (en) * | 2011-01-07 | 2012-07-12 | Braden Manufacturing, Llc | Duct with transition section for turbine exhaust |
WO2016209365A1 (en) * | 2015-06-22 | 2016-12-29 | Saudi Arabian Oil Company | Flow distribution device and method |
US10280772B2 (en) | 2015-06-22 | 2019-05-07 | Saudi Arabian Oil Company | Flow distribution device and method |
US10563527B2 (en) | 2015-06-22 | 2020-02-18 | Saudi Arabian Oil Company | Flow distribution device and method |
Also Published As
Publication number | Publication date |
---|---|
IT1290579B1 (en) | 1998-12-10 |
EP0863364A3 (en) | 1999-07-28 |
ITMI970509A1 (en) | 1998-09-07 |
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