WO1994017320A2 - Exhaust system for combustion gases for a gas turbine - Google Patents
Exhaust system for combustion gases for a gas turbine Download PDFInfo
- Publication number
- WO1994017320A2 WO1994017320A2 PCT/US1994/001044 US9401044W WO9417320A2 WO 1994017320 A2 WO1994017320 A2 WO 1994017320A2 US 9401044 W US9401044 W US 9401044W WO 9417320 A2 WO9417320 A2 WO 9417320A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust
- valve means
- exhaust pipe
- pipe
- branch pipe
- Prior art date
Links
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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/052—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with pivoted closure members, e.g. butterfly valves
Definitions
- the invention relates to an exhaust system for combustion gases from a gas turbine or the like, wherein one end of an exhaust pipe is connected to said gas
- the object of the invention is to obtain an exhaust system of the above kind, wherein the above drawback of the known exhaust systems can be overcome.
- Figure 1 shows a vertical cross section through an embodiment of the invention with one position of the value elements shown in phantom.
- the figure shows a housing 1 which forms part of an exhaust pipe, through which combustion gases from a gas turbine or the like can be exhausted in the direction according to the arrow A to a heat exchanger or the like (not shown). Seen in the direction of flow of the combustion gases according to arrow A further pipe parts (not shown) are thereby connected upstream and downstream of the housing I to opposite flanges 2 and 3 having openings of square, rectangular regular or other suitable section.
- the housing 1 is provided with a further exhaust opening 4 of substantially rectangular or square section, which is bounded by a flange 5, to which a branch pipe
- branch pipe 6 is connected, said branch pipe in the illustrated embodiment extending perpendicularly to the longitudinal axis of the exhaust pipe. Exhaust gases flow through branch pipe 6 in the direction of Arrow B.
- the housing 1 At its bottom side the housing 1 is provided with a recessed chamber 8 defining a space 7, in which a valve-shaped shut-off means 9 is located. This chamber is outside the main exhaust path.
- the valve-shaped shut-off means can be pivoted counter-clockwise, as seen in the Figure, through an angle ⁇ of ⁇ 55° about a pivot axis 10, from the position illustrated in the Figure to the position 9' shown in phantom or dotted lines. Said pivoting is limited by stops 11 secured to the walls of the housing 1.
- a pivot axis 12 which extends parallel to the pivot axis 10, is provided near the upper side of the housing 1 , downstream of the passage 4, seen in the Figure.
- a valve means 13 connected to the pivot axis 12 is pivotabie counter-clockwise through an angle ⁇ of ⁇ 70°, from the horizontal position shown in full lines in the Figure to the position 13' shown in dotted lines. Said pivoting to position 13' is limited by stops 14 secured to the walls of the housing 1.
- valve means 9 and 13 close the passage through the housing 1 , and thus the passage through the exhaust channel downstream of the opening 4 in the housing 1.
- a pivot axis 15 extending parallel to the pivot axes 10 and 12 is journalied in the housing at the upstream side of the opening 4, near the connection of the branch pipe 6 to the opening 4.
- a further valve means 16 is connected to said pivot axis 15, which valve means can be pivoted counter-clockwise through 90°, from the horizontal position shown in full lines in the Figure to the position 161 shown in dotted lines, in which the valve means 16 is at least largely located within the exhaust 5 pipe 6, extending parallel to a boundary wall of the exhaust pipe 6 thereby.
- Valve means 16 has an outer surface 20 which is designed to from a near continuous surface with the outer surface 21 of valve mean 13. This near continuous extension of the outer surface provide for a more laminar flow of exhaust gases in direction A through the exhaust pipe when the branch pipe is sealed.
- a guide piece 17 located under the pivot axis 15 is constructed in such a manner that a boundary wall of said guide piece 17 forms a guiding surface 18.
- the construction of the guiding surface 18 is such that one end 19 of said guiding surface joins the inner boundary wall (not shown) of a pipe section of the exhaust pipe connecting to the upstream end of the housing 1 of the exhaust pipe.
- valve means 16 shown in full lines the passage through the exhaust pipe is entirely open and the valve means 16 and 13 close the passage in the direction of the branch pipe 6, whereby the boundary surfaces of the valve means 16 and 13 directed towards the interior of the passage of the exhaust pipe are at least substantially in line and in line with the boundary walls of the parts of the exhaust pipe connecting to the housing 1 and said boundary surface of the valve means 16 bounds said guiding surface 18 near the end 19 of the guiding surface 18.
- valve means 9 and 13 In the positions 9' and 13' of the valve means 9 and 13 shown in dotted lines said valve means close the passage through the exhaust pipe, whilst the passage in the direction of the branch pipe 6 is released thereby, since the valve means 16 has been pivoted to position 16', so that the combustion gases can be exhausted through the branch pipe 6 in the direction according to arrow B.
- valves 9 and 13 in the positions 9' and 13', whereby the valve means 13' located nearest the branch pipe 6 includes a larger angle with the longitudinal axis of the exhaust pipe than the valve means 9', which is arranged in the part of the exhaust pipe remote from the branch pipe 6.
- the two valves form a guiding surface for the flow of the gases which extends more or less parallel to the guiding surface 18.
- the two valves 9" and 13' thereby form a multiple slope surface for redirecting the exhaust flow towards the branch pipe 6. This multiple slope surface can cooperate with guiding surface 18 by having a similar aerodynamic slope.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Exhaust Silencers (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention relates to an exhaust system for combustion gases from a gas turbine or the like, wherein one end of an exhaust pipe (1) is connected to a gas turbine. The other end of the exhaust pipe is connected to a heat exchanger, and a branch pipe (6), which extends transversely to the exhaust pipe, is connected to the exhaust pipe. A valve (13, 9, 16) is pivotable about a pivot axis (12, 10, 15) extending transversely to the longitudinal direction of the exhaust pipe, between a first position, in which said valve extends at least substantially parallel to the longitudinal axis of the exhaust pipe and the end of the branch pipe connecting to the exhaust pipe is closed, and a second position, in which the branch pipe is in open communication with the exhaust pipe and the exhaust pipe downstream of the branch pipe is closed. The pivot axis of at least a portion of said valve means is arranged near the downstream side of the branch pipe, whilst upstream of said pivot axis a curved guiding surface is provided.
Description
EXHAUST SYSTEM FOR COMBUSTION GASES FOR A GAS TURBINE
BACKGROUND OF THE INVENTION
With known exhaust systems for application in conjunction with gas turbine undesirable vortexes are created near the connection of the branch pipe to the exhaust pipe, in particular upstream of the branch pipe, when the combustion gases 5 from the gas turbine or the like must be exhausted through the branch pipe. Such vortexes have an adverse effect on the exhaust of the combustion gases through the branch pipe, and thus also on the efficiency of the gas turbine or the like.
The invention relates to an exhaust system for combustion gases from a gas turbine or the like, wherein one end of an exhaust pipe is connected to said gas
10 turbine or the like, whilst the other end of the exhaust pipe is connected to a heat exchanger or the like, and a branch pipe, which extends transversely to the exhaust pipe, is connected to the exhaust pipe, whereby at least one valve means is disposed near the connection of the branch pipe to the exhaust pipe, and at least a portion of the valve means is pivotable about a pivot axis extending transversely to the
15 longitudinal direction of the exhaust pipe, between a first position, in which said valve means extends at least substantially parallel to the longitudinal axis of the exhaust pipe and the end of the branch pipe joined to the exhaust pipe is closed, and a second position, in which the branch pipe is in open communication with the exhaust pipe and the exhaust pipe downstream of the branch pipe is closed.
20 The object of the invention is to obtain an exhaust system of the above kind, wherein the above drawback of the known exhaust systems can be overcome.
According to the invention this can be achieved in that the pivot axis of at least a portion of said valve means is arranged near the downstream side of the branch pipe, whilst upstream of said pivot axis a curved guiding surface is provided, which
25 extends from one of its ends joining the nearby boundary wall of the part of the exhaust pipe located upstream of the branch pipe in the direction of the interior of the
; branch pipe.
When using the construction according to the invention an even deflection of
^ the combustion gases from the exhaust pipe into the branch pipe is obtained with 30 greater resulting efficiency.
The invention will be explained in more detail hereafter with reference to an embodiment of the construction according to the invention illustrated in the accompanying figure.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows a vertical cross section through an embodiment of the invention with one position of the value elements shown in phantom.
The figure shows a housing 1 which forms part of an exhaust pipe, through which combustion gases from a gas turbine or the like can be exhausted in the direction according to the arrow A to a heat exchanger or the like (not shown). Seen in the direction of flow of the combustion gases according to arrow A further pipe parts (not shown) are thereby connected upstream and downstream of the housing I to opposite flanges 2 and 3 having openings of square, rectangular regular or other suitable section.
The housing 1 is provided with a further exhaust opening 4 of substantially rectangular or square section, which is bounded by a flange 5, to which a branch pipe
6 is connected, said branch pipe in the illustrated embodiment extending perpendicularly to the longitudinal axis of the exhaust pipe. Exhaust gases flow through branch pipe 6 in the direction of Arrow B.
At its bottom side the housing 1 is provided with a recessed chamber 8 defining a space 7, in which a valve-shaped shut-off means 9 is located. This chamber is outside the main exhaust path. The valve-shaped shut-off means can be pivoted counter-clockwise, as seen in the Figure, through an angle α of ± 55° about a pivot axis 10, from the position illustrated in the Figure to the position 9' shown in phantom or dotted lines. Said pivoting is limited by stops 11 secured to the walls of the housing 1.
A pivot axis 12, which extends parallel to the pivot axis 10, is provided near the upper side of the housing 1 , downstream of the passage 4, seen in the Figure. A valve means 13 connected to the pivot axis 12 is pivotabie counter-clockwise through an angle β of ± 70°, from the horizontal position shown in full lines in the Figure to the position 13' shown in dotted lines. Said pivoting to position 13' is limited by stops 14 secured to the walls of the housing 1.
It will be apparent that in the positions 9' and 13' of the two valve means 9 and 13 shown in dotted lines said valve means close the passage through the housing 1 ,
and thus the passage through the exhaust channel downstream of the opening 4 in the housing 1.
A pivot axis 15 extending parallel to the pivot axes 10 and 12 is journalied in the housing at the upstream side of the opening 4, near the connection of the branch pipe 6 to the opening 4. A further valve means 16 is connected to said pivot axis 15, which valve means can be pivoted counter-clockwise through 90°, from the horizontal position shown in full lines in the Figure to the position 161 shown in dotted lines, in which the valve means 16 is at least largely located within the exhaust 5 pipe 6, extending parallel to a boundary wall of the exhaust pipe 6 thereby. Valve means 16 has an outer surface 20 which is designed to from a near continuous surface with the outer surface 21 of valve mean 13. This near continuous extension of the outer surface provide for a more laminar flow of exhaust gases in direction A through the exhaust pipe when the branch pipe is sealed. This provides for a more efficient system with less energy loss. As is furthermore apparent from the Figure a guide piece 17 located under the pivot axis 15 is constructed in such a manner that a boundary wall of said guide piece 17 forms a guiding surface 18. The construction of the guiding surface 18 is such that one end 19 of said guiding surface joins the inner boundary wall (not shown) of a pipe section of the exhaust pipe connecting to the upstream end of the housing 1 of the exhaust pipe.
From said end 19 the curved guiding surface 18 gradually extends in the direction of the branch pipe, as will be apparent from Figure 1. The pivot axis 15 is thereby located behind the curved guiding surface, seen from the exhaust pipe in a direction parallel to the longitudinal axis of the branch pipe. It will be apparent that in the positions of the various valve means 9, 13 and
16 shown in full lines the passage through the exhaust pipe is entirely open and the valve means 16 and 13 close the passage in the direction of the branch pipe 6, whereby the boundary surfaces of the valve means 16 and 13 directed towards the interior of the passage of the exhaust pipe are at least substantially in line and in line with the boundary walls of the parts of the exhaust pipe connecting to the housing 1 and said boundary surface of the valve means 16 bounds said guiding surface 18 near the end 19 of the guiding surface 18.
In the positions 9' and 13' of the valve means 9 and 13 shown in dotted lines said valve means close the passage through the exhaust pipe, whilst the passage in the direction of the branch pipe 6 is released thereby, since the valve means 16 has
been pivoted to position 16', so that the combustion gases can be exhausted through the branch pipe 6 in the direction according to arrow B.
In practice it has become apparent that the curved guiding surface 18 contributes towards an even deflection of the flow of the combustion gases from the exhaust pipe into the branch pipe.
This even deflection of the flow is also supported by the above-described arrangement of the valves 9 and 13 in the positions 9' and 13', whereby the valve means 13' located nearest the branch pipe 6 includes a larger angle with the longitudinal axis of the exhaust pipe than the valve means 9', which is arranged in the part of the exhaust pipe remote from the branch pipe 6. In this manner the two valves form a guiding surface for the flow of the gases which extends more or less parallel to the guiding surface 18. The two valves 9" and 13' thereby form a multiple slope surface for redirecting the exhaust flow towards the branch pipe 6. This multiple slope surface can cooperate with guiding surface 18 by having a similar aerodynamic slope.
Claims
1. An exhaust system for combustion gases comprising: an exhaust pipe having first and second ends for transport of exhaust gas from said first end towards said second end; branch pipe communicating with said exhaust pipe intermediate said first and second ends; first valve means pivotable about a pivot axis extending generally transversely to the longitudinal direction of the exhaust pipe between a first position in which said valve means extends at least substantially parallel to the longitudinal axis of said exhaust pipe when the end of the branch pipe communicating with the exhaust is closed and a second position in which said branch pipe is in open communication with said exhaust pipe and the exhaust pipe downstream of the branch pipe is closed, said pivot axis of at lest a portion of said valve means disposed near the upstream side of said branch pipe.
2. An exhaust system according to claim 1 further comprising curved flow guiding surface extending from the upstream wall of said exhaust pipe towards the interior of said branch pipe for aiding the redirection of exhaust gas flow from said exhaust pipe towards said branch pipe.
3. The exhaust system according to claim 1 further comprising: second valve means pivotable about a pivot axis parallel to the pivot axis of said first valve means whereby said second valve means can be pivoted from a position closing the branch pipe in cooperation with said first valve means to a second position into the interior of the exhaust pipe for aiding in the closing of said exhaust pipe.
4. The exhaust system according to claim 3 further comprising: third valve means pivotable from a first position allowing passage of exhaust through the exhaust pipe to a second position whereby said third valve means closes the passage through the said exhaust pipe in cooperation with said second valve means.
5. The exhaust system according to claim 4 wherein said third valve means is pivotable about a pivot axis extending parallel to the pivot axis of said other valve means from a spaced located outside the passage of the exhaust pipe to a position inside the exhaust pipe.
6. The exhaust system according to claim 4 wherein said third valve means forms a smaller angle with the longitudinal axis of said exhaust pipe than the angle formed with the longitudinal axis of said exhaust pipe by said second valve means when said second and third valve means cooperate to close said exhaust pipe.
7. The exhaust system according to claim 4 wherein said second valve means is journalled by way of a pivot shaft in a housing forming part of the exhaust pipe.
8. An exhaust system according to claim 2 wherein said first valve means, in its position closing said branch pipe, joins the curved guiding surface upstream of the branch pipe so as to aid laminar flow of the exhaust gas past the branch pipe.
9. An exhaust system for combustion gases from a gas turbine comprising: an exhaust pipe having first and second ends for transport of exhaust gas from said first end toward said second end; branch pipe communicating with said exhaust pipe intermediate said first and second ends; first valve means pivotable about a pivot axis extending generally transversely to the longitudinal direction of the exhaust pipe between a first position in which said valve means extends at least substantially parallel to the longitudinal axis of said exhaust pipe when the end of the branch pipe communicating with the exhaust is closed and a second position in which said branch pipe is an open communication with said exhaust pipe and the exhaust pipe downstream of the branch pipe is closed, said pivot axis of said first valve means being disposed near the upstream side of said branch pipe; second valve means pivotable about an axis parallel to the pivot axis of said first valve means or by said second valve means can be pivoted from a position closing the branch pipe in cooperation with said first valve means to a second position into the interior of the exhaust pipe for aiding in the closing of said exhaust pipe; third valve means pivotable from a first position allowing passage of exhaust through the exhaust pipe to a second position whereby said third valve means closes the passage through said exhaust pipe in cooperation with said second valve means; curve flow guiding surface extending from the upstream wall of said exhaust pipe towards the interior of said branch pipe for aiding in the redirection of exhaust gas flow from said exhaust pipe toward said branch pipe when said branch pipe is in open communication with said exhaust pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9300173A NL9300173A (en) | 1993-01-28 | 1993-01-28 | Exhaust system for combustion gases from a gas turbine or the like. |
| NL9300173 | 1993-01-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1994017320A2 true WO1994017320A2 (en) | 1994-08-04 |
| WO1994017320A3 WO1994017320A3 (en) | 1994-09-15 |
Family
ID=19861991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1994/001044 WO1994017320A2 (en) | 1993-01-28 | 1994-01-27 | Exhaust system for combustion gases for a gas turbine |
Country Status (2)
| Country | Link |
|---|---|
| NL (1) | NL9300173A (en) |
| WO (1) | WO1994017320A2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0773403A1 (en) * | 1995-11-10 | 1997-05-14 | Asea Brown Boveri Ag | Power plant |
| DE19915888A1 (en) * | 1999-04-08 | 2000-10-19 | Zimmermann & Jansen Gmbh | Fluid catalytic cracking system and flap valve for such |
| CN102425686A (en) * | 2011-10-11 | 2012-04-25 | 无锡市华通电力设备有限公司 | Bypass reversing baffle plate for waste heat boiler |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3331394A (en) * | 1964-11-23 | 1967-07-18 | Ingersoll Rand Co | Gas valve |
| US5002121A (en) * | 1988-09-13 | 1991-03-26 | Stober + Morlock Warmekraft Gesellschaft Mbh | Device at the output side of a gas turbine |
-
1993
- 1993-01-28 NL NL9300173A patent/NL9300173A/en not_active Application Discontinuation
-
1994
- 1994-01-27 WO PCT/US1994/001044 patent/WO1994017320A2/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3331394A (en) * | 1964-11-23 | 1967-07-18 | Ingersoll Rand Co | Gas valve |
| US5002121A (en) * | 1988-09-13 | 1991-03-26 | Stober + Morlock Warmekraft Gesellschaft Mbh | Device at the output side of a gas turbine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0773403A1 (en) * | 1995-11-10 | 1997-05-14 | Asea Brown Boveri Ag | Power plant |
| DE19915888A1 (en) * | 1999-04-08 | 2000-10-19 | Zimmermann & Jansen Gmbh | Fluid catalytic cracking system and flap valve for such |
| CN102425686A (en) * | 2011-10-11 | 2012-04-25 | 无锡市华通电力设备有限公司 | Bypass reversing baffle plate for waste heat boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| NL9300173A (en) | 1994-08-16 |
| WO1994017320A3 (en) | 1994-09-15 |
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