CN106287816B - A kind of dry low emissions burner - Google Patents
A kind of dry low emissions burner Download PDFInfo
- Publication number
- CN106287816B CN106287816B CN201610662575.9A CN201610662575A CN106287816B CN 106287816 B CN106287816 B CN 106287816B CN 201610662575 A CN201610662575 A CN 201610662575A CN 106287816 B CN106287816 B CN 106287816B
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- China
- Prior art keywords
- boss portion
- hole
- body part
- spray boom
- dry low
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Classifications
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- 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
- F23R3/38—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising rotary fuel injection means
-
- 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
- F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
- F23R2900/03343—Pilot burners operating in premixed mode
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
Abstract
The present invention relates to the designs of gas turbine dry low emission combustor to lead, in particular to a kind of dry low emissions burner.Dry low emissions burner includes: casing；Cyclone has body part and first boss portion, and forms the first annular interior cavity open at one end between the inner wall of casing and the outer wall of body part, offers the first groove and the second groove arranged side by side in the axial direction on body part outer wall；First through hole and the second through-hole are provided in the first groove；Third through-hole is provided in the second groove；Fuel nozzle has second boss portion annular in shape, main fuel spray boom, fuel spray boom on duty, center cold air baffle and taper sheath；Burner inner liner is coaxially set in one end end in cyclone body portion backwards to first boss portion.Dry low emissions burner of the invention can effectively realize that fuel mixes and stablize burning with the good of air, can prevent tempering problem common in premixed combustion.
Description
Technical field
The present invention relates to the designs of gas turbine dry low emission combustor to lead, in particular to a kind of dry low emissions burning
Device.
Background technique
Dry low emissions combustion technology has broad application prospects on industry gas turbine, is reducing pollutant emission
Aspect is with good performance, is the technical way that gas turbine field meets related environmental regulation both at home and abroad.It is external
Many manufacturers have formed respective unique dry low emissions combustion technology, these technologies have become domestic gas turbine into
The main threshold for entering market, taking part in international competition.Therefore, dry low emissions combustion technology with independent intellectual property rights is researched and developed,
For breaking external monopolization, gas turbine industry development in China's is pushed to be of great significance.
Further, it for current dry low emissions combustion technology, still remains and main problem packet to be solved
Include: the mixing of fuel in combustion chamber and air is not sufficiently good, and burning is caused to be not sufficiently stable；Often occurs tempering shape when premixed combustion
Condition.
Summary of the invention
The object of the present invention is to provide a kind of dry low emissions burners, to solve at least one above-mentioned technical problem.
The technical scheme is that
A kind of dry low emissions burner, comprising:
Casing, it is cylindrical；
Cyclone, including cylindrical body part and be co-axially located at described body part one end it is annular in shape first
Boss portion, the body part of the cyclone are co-axially located inside the casing, and pass through the first boss portion and the machine
Casket one end end part seal is fixedly connected, and is formed between the inner wall of the casing and the outer wall of the body part open at one end
First annular interior cavity offers the first groove and the second groove arranged side by side in the axial direction on the body part outer wall；Institute
It states and radially offers multiple spaced first through hole in the first groove, also offer one second in the axial direction
Through-hole；One third through-hole is radially offered in second groove；
Fuel nozzle has second boss portion annular in shape, main fuel spray boom, fuel spray boom on duty, center cold air gear
Plate and taper sheath；The second boss portion is connect with first boss portion co-axial seal, and in the second boss portion
Portion is formed with the second annular cavity, and second annular cavity has fuel inlet end；The main fuel spray boom is fixed at
In the second boss portion, one end is connected to second annular cavity, and the other end runs through second through-hole in the axial direction,
It extend into first groove, the main fuel spray boom opens up fourth hole corresponding with the first through hole position；Institute
Center cold air baffle is stated to be co-axially located in the body part of the cyclone, and with the body part and the second boss portion
Constitute third annular cavity；The fuel spray boom on duty sequentially passes through the second boss along second boss portion central axis
Portion and the center cold air baffle, extend into the body part of the cyclone；The taper sheath passes through one end from the center
The side backwards to the second boss portion of cold air baffle, is coaxially set in outside described value class fuel spray boom, and with described the
Two boss portions be tightly connected, between other end end and the fuel spray boom outer ring surface on duty have annular gap, and it is described in
The fifth hole for the third annular cavity to be connected to the taper sheath inner cavity is offered on heart cold air baffle；Described
Three through-holes are connected to the third annular cavity；
Burner inner liner is coaxially set in one end end in the cyclone body portion backwards to the first boss portion.
Optionally, the first boss portion is bolted with the second boss portion.
Optionally, the junction in the second boss portion and the first boss portion is provided with sealing ring.
Optionally, the fourth hole on the main fuel spray boom is two rows, and two rows of fourth holes are in the axial direction simultaneously
Column setting, and two rows of fourth holes are respectively positioned on the one side towards the first through hole of the main fuel spray boom.
Optionally, first groove is identical as second number of recesses, and is spaced apart.
Optionally, the quantity of the fifth hole is multiple, and using the center of circle of the center cold air baffle as the center of circle, is in ring
Shape distribution.
Optionally, it is logical to be uniformly provided with multiple six for one end end backwards to the second boss portion of the taper sheath
Hole.
Invention effect:
Dry low emissions burner of the invention can effectively realize that fuel mixes and stablize burning with the good of air,
It can prevent tempering problem common in premixed combustion.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of dry low emissions burner of the present invention；
Fig. 2 is the cross-sectional view of dry low emissions burner of the present invention；
Fig. 3 is the structural schematic diagram of cyclone in dry low emissions burner of the present invention；
Fig. 4 is the structural schematic diagram of fuel nozzle in dry low emissions burner of the present invention；
Fig. 5 is the structural schematic diagram of taper sheath end in dry low emissions burner of the present invention；
Fig. 6 be fuel in dry low emissions burner of the present invention, air flowing with mix schematic diagram；
Fig. 7 be in dry low emissions burner of the present invention the flowing of the fuel, air of cyclone part with mix schematic diagram.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label indicate same or similar element or element with the same or similar functions.Described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to use
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.Under
Face is described in detail the embodiment of the present invention in conjunction with attached drawing.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as protecting the present invention
The limitation of range.
1 to Fig. 7 the present invention is described in further details with reference to the accompanying drawing.
The present invention provides a kind of dry low emissions burner, may include casing 4, cyclone 1, fuel nozzle 2 and
Burner inner liner 5.
Casing 4 is cylindrical, can be known a variety of suitable structures.
Cyclone 1 include cylindrical body part 11 and be co-axially located at 11 one end of body part it is annular in shape first
Boss portion 12.
Body part 11 is co-axially located inside casing 4, and passes through bolt by first boss portion 12 and 4 one end end of casing
It is sealedly and fixedly connected；And the first annular interior cavity 13 open at one end is formed between the inner wall of casing 4 and the outer wall of body part 11,
Offer the first groove 14 and the second groove 15 arranged side by side in the axial direction on 11 outer wall of body part；The edge in the first groove 14
Radial direction offers multiple spaced first through hole 141, also offers second through-hole 142 in the axial direction；?
Second groove 15 radially offers one third through-hole 151.Wherein, the quantity of the first groove 14 and the second groove 15
It is identical, and particular number can according to need and carry out suitable selection；It is preferably each setting 6 in the present embodiment, 6 first recessed
The quantity of the second groove of slot 14 and 6 15 is staggered side by side.
Fuel nozzle 2 has second boss portion 21 annular in shape, main fuel spray boom 22, fuel spray boom 23 on duty, center
Cold air baffle 24 and taper sheath 25.Wherein, fuel nozzle 2 takes cell cube to design, and is connected between cyclone 1,
It maintains easily, replace and repairs.
Second boss portion 21 is connect with 12 co-axial seal of first boss portion, it is preferable that first boss portion 12 and second boss
Portion 21 is attached by bolt, and junction is provided with sealing ring 3；Further, it is formed with inside second boss portion 21
Second annular cavity 26, the second annular cavity 26 have fuel inlet end 261.
Main fuel spray boom 22 is fixed in second boss portion 21, and one end is connected to the second annular cavity 26, the other end
Run through the second through-hole 142 in the axial direction, extend into the first groove 14, main fuel spray boom 22 opens up and first through hole 141
Set corresponding fourth hole 221.Equally, it is this reality depending on the quantity of the first groove 14 that main fuel spray boom 22, which is quantity,
Applying example is preferably 6.And the quantity of the fourth hole 221 on main fuel spray boom 22 equally can according to carrying out suitable setting,
It is preferably two rows of in the present embodiment, it is set side by side in the axial direction, and two rows of fourth holes 221 are respectively positioned on main fuel spray boom 22
On one side towards first through hole 141.
Center cold air baffle 24 is co-axially located in the body part of cyclone 1, and with body part 11 and second boss portion
21 constitute third annular cavity 27.Fuel spray boom 23 on duty is one, and along second boss portion, 21 central axis sequentially passes through second
Boss portion 21 and center cold air baffle 24, extend into the body part of cyclone 1.
One end of taper sheath 25 is coaxially set on duty from the side backwards to second boss portion 21 of center cold air baffle 24
It outside fuel spray boom 23, and is tightly connected with second boss portion 21, between other end end and 23 outer ring surface of fuel spray boom on duty
It is offered with annular gap 251, and on center cold air baffle 24 for connecting third annular cavity 27 and 25 inner cavity of taper sheath
Logical fifth hole 241.Wherein, the quantity of fifth hole 241, which can according to need, is set as multiple, and with center cold air baffle
24 center of circle is the center of circle, annular in shape to be distributed.
Further, one end end backwards to second boss portion 21 of taper sheath 25 is uniformly provided with multiple 6th through-holes 252；
In addition, third through-hole 151 is connected to third annular cavity 27.Wherein, the quantity of the 6th through-hole 252, which can according to need, is fitted
The selection of conjunction, preferably 2 rows, every row 18 in the present embodiment.
Burner inner liner 5 is coaxially set in one end end on 1 body part of cyclone backwards to first boss portion 12.Further, exist
On one end end in first boss portion 12 and at 5 link position of burner inner liner, multiple 7th through-holes 16 are additionally provided with, multiple seven is logical
Hole 16 can be to be multiple rows of, and the 7th through-hole 16 in every row is uniformly distributed circumferentially；It is preferably 1 row in the present embodiment, estimates 32.
In dry low emissions burner of the invention, air can be flowed into through the first groove 14 on cyclone 1, with main combustion
Expect that blending (referring specifically to shown in Fig. 7) occurs for the fuel that fourth hole 221 flows out on spray boom 22；Fuel-air after blending is mixed
It closes object and flows into shape between 25 outer wall of taper sheath and 11 inner wall of body part of cyclone 1 through the tangential first through hole 141 on cyclone 1
At premixer, continuesd to mix in premixer uniformly and rotate outflow, exported (lower end port in Fig. 6) in premixer and formed back
It flows area and stablizes burning, main fuel can be made to mix well with air, reach the good uniformity.
Further, the spray-hole of 23 bottom of fuel spray boom on duty directly injects fuel into the reflux into premixer outlet
Area has the function of stablizing flame with the mode combustion of diffusion combustion.The circulation area streamwise of the premixer gradually becomes
Greatly, the air capacity gradually increased is adapted to, premixes indoor irregular flowing to eliminate, while avoiding the fuel gas return-flow in recirculating zone
To premixer, to prevent from burning in premixer.
In addition, air through the radial third through-hole 151 on cyclone 1, the fifth hole 241 on center cold air baffle 24 into
The inner cavity for entering taper sheath 25 flows out through the 6th through-hole 252 of cooling air air inlet and annular gap 251, can reduce wall surface at this
Neighbouring fuel concentration prevents from being tempered along wall surface.Further, air is also through the cooling air air inlet the 7th on cyclone 1
Through-hole 16 flows along wall surface tangentially into premixer, reduces fuel concentration herein, prevent from being tempered along wall surface.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be with the scope of protection of the claims
It is quasi-.
Claims (7)
1. a kind of dry low emissions burner characterized by comprising
Casing (4), it is cylindrical；
Cyclone (1) including cylindrical body part (11) and is co-axially located at the body part (11) one end in annulus
The first boss portion (12) of shape, it is internal that the body part (11) is co-axially located at the casing (4), and passes through the first boss
Portion (12) is fixedly connected with the casing (4) one end end part seal, and in the inner wall of the casing (4) and the body part (11)
Outer wall between form the first annular interior cavity (13) open at one end, opened up in the axial direction on the body part (11) outer wall
There are the first groove (14) and the second groove (15) arranged side by side；Multiple are radially offered in first groove (14)
Every the first through hole (141) of setting, second through-hole (142) is also offered in the axial direction；In second groove (15)
Radially offer one third through-hole (151)；
Fuel nozzle (2), have second boss portion (21) annular in shape, main fuel spray boom (22), fuel spray boom on duty (23),
Center cold air baffle (24) and taper sheath (25)；The second boss portion (21) and first boss portion (12) co-axial seal
Connection, and be formed with the second annular cavity (26) inside the second boss portion (21), the second annular cavity (26) tool
There are fuel inlet end (261)；The main fuel spray boom (22) is fixed on the second boss portion (21), one end with it is described
Second annular cavity (26) connection, the other end run through second through-hole (142) in the axial direction, extend into first groove
(14) in, the main fuel spray boom (22) opens up fourth hole (221) corresponding with the first through hole (141) position；Institute
Center cold air baffle (24) is stated to be co-axially located in the body part of the cyclone (1), and with the body part (11) and institute
It states second boss portion (21) and constitutes third annular cavity (27)；The fuel spray boom (23) on duty is along the second boss portion (21)
Central axis sequentially passes through the second boss portion (21) and the center cold air baffle (24), extend into the cyclone (1)
Body part in；One end of the taper sheath (25) is from the center cold air baffle (24) backwards to the second boss portion (21)
Side, it is external to be coaxially set in described value class fuel spray boom (23), and be tightly connected with the second boss portion (21), it is another
Holding between end and fuel spray boom (23) outer ring surface on duty has annular gap (251), and the center cold air baffle
(24) fifth hole for the third annular cavity (27) to be connected to the taper sheath (25) inner cavity is offered on
(241)；The third through-hole (151) is connected to the third annular cavity (27)；
Burner inner liner (5) is coaxially set in one end end on the cyclone (1) body part backwards to the first boss portion (12)
Portion.
2. dry low emissions burner according to claim 1, which is characterized in that the first boss portion (12) with it is described
Second boss portion (21) is bolted.
3. dry low emissions burner according to claim 1 or 2, which is characterized in that the second boss portion (21) with
The junction of the first boss portion (12) is provided with sealing ring (3).
4. dry low emissions burner according to claim 1, which is characterized in that on the main fuel spray boom (22)
Four through-holes (221) are two rows, are set side by side in the axial direction, and two rows of fourth holes (221) are respectively positioned on the main fuel
On the one side towards the first through hole (141) of spray boom (22).
5. dry low emissions burner according to claim 1, which is characterized in that first groove (14) and described the
Two grooves (15) quantity is identical, and is spaced apart.
6. dry low emissions burner according to claim 1, which is characterized in that the quantity of the fifth hole (241)
It is annular in shape to be distributed to be multiple, and using the center of circle of the center cold air baffle (24) as the center of circle.
7. dry low emissions burner according to claim 1, which is characterized in that the taper sheath (25) backwards to described
One end end in second boss portion (21) is uniformly provided with multiple 6th through-holes (252).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610662575.9A CN106287816B (en) | 2016-08-12 | 2016-08-12 | A kind of dry low emissions burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610662575.9A CN106287816B (en) | 2016-08-12 | 2016-08-12 | A kind of dry low emissions burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106287816A CN106287816A (en) | 2017-01-04 |
| CN106287816B true CN106287816B (en) | 2019-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610662575.9A Active CN106287816B (en) | 2016-08-12 | 2016-08-12 | A kind of dry low emissions burner |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654537B (en) * | 2018-12-07 | 2020-10-09 | 中国航发沈阳发动机研究所 | Central fuel nozzle |
| CN109611891B (en) * | 2018-12-16 | 2020-11-06 | 中国航发沈阳发动机研究所 | Dry low-emission combustor |
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| US5244380A (en) * | 1991-03-12 | 1993-09-14 | Asea Brown Boveri Ltd. | Burner for premixing combustion of a liquid and/or gaseous fuel |
| US6082111A (en) * | 1998-06-11 | 2000-07-04 | Siemens Westinghouse Power Corporation | Annular premix section for dry low-NOx combustors |
| US6192688B1 (en) * | 1996-05-02 | 2001-02-27 | General Electric Co. | Premixing dry low nox emissions combustor with lean direct injection of gas fule |
| US20030014975A1 (en) * | 2001-06-29 | 2003-01-23 | Mitsubishi Heavy Industries, Ltd. | Gas turbine combustor |
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| CN101769531A (en) * | 2008-12-30 | 2010-07-07 | 通用电气公司 | DLN dual fuel primary nozzle |
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| CN102563698A (en) * | 2010-12-06 | 2012-07-11 | 通用电气公司 | Method for operating an air-staged diffusion nozzle |
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| CN106287816A (en) | 2017-01-04 |
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