CN107806647A - A kind of premix of gas-turbine combustion chamber nozzle on duty - Google Patents
A kind of premix of gas-turbine combustion chamber nozzle on duty Download PDFInfo
- Publication number
- CN107806647A CN107806647A CN201711135243.6A CN201711135243A CN107806647A CN 107806647 A CN107806647 A CN 107806647A CN 201711135243 A CN201711135243 A CN 201711135243A CN 107806647 A CN107806647 A CN 107806647A
- Authority
- CN
- China
- Prior art keywords
- circulation road
- duty
- nozzle
- turning circulation
- inward
- 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.)
- Pending
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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
- F23R3/28—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
- 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
- F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
A kind of premix of gas-turbine combustion chamber nozzle on duty, including：Bore cover, outward turning circulation road, inward turning circulation road and fuel nozzle on duty, wherein described cone cover is arranged on the front end of the outward turning circulation road and forms a horn opening, the rear end of the outward turning circulation road is stretched into the fore-end of the inward turning circulation road and forms a hemi-closure space, the fuel nozzle on duty is arranged in the inward turning circulation road, the outward turning circulation road and the inward turning circulation road all have a multiple rotation launder channels being uniformly distributed circumferentially, and multiple rotation launder channels on the inward turning circulation road, which are arranged on, not to be extended on the part of the outward turning circulation road.The outlet fuel air of the premix nozzle on duty of the present invention is well mixed, and flame peak temperature is low, is advantageous to expand the load range of nozzle on duty, and reduces NOx emission.
Description
Technical field
The present invention relates to gas turbine technology field, the especially a kind of premix of gas-turbine combustion chamber nozzle on duty.
Background technology
Nitrogen oxides includes nitrous oxide, nitric oxide and nitrogen dioxide etc..Nitrogen oxides is dirty as main air
Contaminate one of thing, the main reason for causing to poison to animals and plants, and forming acid rain, acid mist and photochemical fog.Gas turbine
As important power-equipment, on the one hand need to improve constantly combustor exit temperature to lift gas turbine proficiency, the opposing party
Face needs to reduce discharged nitrous oxides in wider condition range simultaneously.
Existing main flow natural gas heavy duty gas turbine uses poor premixed combustion technology more.Under the low operating mode of poor lean premixed combustor easily
Generation combustion instability, flame is stablized using nozzle on duty more, general nozzle on duty uses diffusion flame, when combustion chamber is in
During low operating mode, the diffusion flame that divergent nozzle is formed can produce substantial amounts of NOx, combustion chamber NOx emission during so as to cause low operating mode
It is not up to standard.NOx emission can be further reduced using premixed flame is on duty, is widened between the Low Emission Zone of combustion chamber.But premix is on duty
The problems such as flame easily causes to be tempered and causes nozzle wall surface high temperature, it is crucial for how designing premix nozzle on duty.
The content of the invention
(1) technical problems to be solved
In view of this, it is a primary object of the present invention to provide a kind of premix of gas-turbine combustion chamber nozzle on duty, use
To improve the stability of recirculating zone, reduce flame peak temperature, the NOx emission of low working condition lower combustion chamber is reduced.
(2) technical scheme
The invention provides a kind of premix of gas-turbine combustion chamber nozzle on duty, including：Bore cover, outward turning circulation road, interior
Swirl channel and fuel nozzle on duty, tubaeform opened wherein the cone cover is arranged on the front end of the outward turning circulation road and forms one
Mouthful, the rear end of the outward turning circulation road is stretched into the fore-end of the inward turning circulation road and forms a hemi-closure space, institute
State fuel nozzle on duty to be arranged in the inward turning circulation road, the outward turning circulation road and the inward turning circulation road all had along week
To equally distributed multiple rotation launder channels, multiple rotation launder channels on the inward turning circulation road, which are arranged on, not to be extended into outside described
On the part of swirl channel.
Preferably, the premix nozzle on duty is located at head of combustion chamber center.
Preferably, the outlet of the cone cover is concordant with main combustion unit nozzle.
Preferably, the axis coinciding of the outward turning circulation road, the inward turning circulation road and the fuel nozzle on duty.
Preferably, the half angle θ of the cone cover1Span be 28 ° -38 °, it is described cone cover height H1Value model
It is contour stealth outside diameter of passage D to enclose21.0-2.0 times.
Preferably, the proportion of the area of inward turning circulation road and inward turning circulation road and the area sum of outward turning circulation road is
50%-80%.
Preferably, the distance and inward eddy outside diameter of passage D of inward eddy channel outlet distance cone cover root1Relation be：
2.0D1≥H2≥0.0D1。
Preferably, the fuel jet orifice of fuel nozzle on duty and the distance H of inward eddy channel outlet3With inward eddy outside diameter of passage
D1Relation be：3.0D1≥H3≥1.0D1。
Preferably, inward turning circulation road has M rotation launder channel, and the rotation launder channel has tangential swirl angle θ2, its
Middle M >=4,60 ° >=θ2>=30 °, it is preferable that the cross-sectional area sum and the cross-sectional area of inward turning circulation road of M rotation launder channel
Proportion：0.9-1.1.
Preferably, outward turning circulation road has N number of rotation launder channel, and the rotation launder channel has tangential swirl angle θ3, its
Middle N >=4,60 ° >=θ3>=30 °, it is preferable that the cross-sectional area sum and the cross-sectional area of outward turning circulation road of N number of rotation launder channel
Proportion：0.9-1.1.
Preferably, fuel nozzle on duty has K fuel jet orifice, along the circumference uniform distribution of fuel nozzle on duty.
(3) beneficial effect
It can be seen from the above technical proposal that the premix nozzle on duty of the gas-turbine combustion chamber of the present invention have it is following beneficial
Effect：
(1) relative to nozzle on duty is spread, premix jet expansion fuel-air on duty and be well mixed, flame peak temperature
It is low, be advantageous to expand the load range of nozzle on duty, and reduce NOx emission；
(2) due to the presence for having cone to cover, nozzle return area stabilization on duty is premixed, outside is air, is advantageous to protection cone cover；
(3) it is compact that nozzle arrangements on duty are premixed, existing diffusion nozzle arrangements on duty can be directly replaced, be easy to practical application
And operation.
Brief description of the drawings
Fig. 1 is the structural representation according to the premix nozzle on duty of the embodiment of the present invention；
Fig. 2 is the profile of inward turning circulation road；
Fig. 3 is the profile of outward turning circulation road.
Description of reference numerals：
100- premixes nozzle on duty；
110- cone covers；120- outward turning circulation roads；
130- inward turning circulation roads；140- fuel nozzles on duty；
150- revolves launder channel；160- fuel jet orifices.
θ1- cone cover half angle；θ2- inward turning circulation road tangential swirl angle；θ3- outward turning circulation road tangential swirl angle；H1- cone cover
Height；H2- inward eddy channel outlet and the distance of cone cover root；H3- fuel jet orifice and the distance of inward eddy channel outlet；D1-
Inward eddy outside diameter of passage；D2- contour stealth outside diameter of passage.
Embodiment
The present invention on the premise of combustion efficiency of combustion chamber and chamber performance is ensured, by optimize nozzle on duty can compared with
Ultralow discharged nitrous oxides are realized in wide load range, can especially reduce the low operating mode lower combustion chamber NOx in combustion chamber discharge,
Premix nozzle arrangements on duty are compact, suitable for the burning of natural gas, producing synthesis gas from coal and other medium-Btu syngas.
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.
Referring to Fig. 1-Fig. 3, case study on implementation of the present invention provides a kind of premix nozzle 100 on duty, including：Cone cover 110, outward turning
Circulation road 120, inward turning circulation road 130 and fuel nozzle on duty 140.Wherein cone cover 110 is arranged on the front end of outward turning circulation road 120
And a horn opening is formed, stretch into rear end and the formation one of outward turning circulation road 120 fore-end of inward turning circulation road 130
Hemi-closure space, fuel nozzle 140 on duty are arranged in inward turning circulation road 130, outward turning circulation road 120 and inward turning circulation road 130
All there are multiple rotation launder channels 150 for being uniformly distributed circumferentially, multiple rotation launder channels 150 on inward turning circulation road 130 are set
Put on the part of outward turning circulation road 120 is not extended into.
Premix nozzle 100 on duty and be located at head of combustion chamber center.Put down with main combustion unit nozzle the outlet of cone cover 110
Together.
The axis coinciding of outward turning circulation road 120, inward turning circulation road 130 and fuel nozzle on duty 140.
The half angle θ of cone cover 1101Span be 28 ° -38 °, cone cover 110 height H1Span be contour stealth
Outside diameter of passage D2Relation be：1.0D2≤H1≤2.0D2。
The area of inward turning circulation road 130 and inward turning circulation road 130 and the proportion of the area sum of outward turning circulation road 120
For 50%-80%.
The distance and inward eddy outside diameter of passage D of inward eddy channel outlet distance cone cover root1Relation be：2.0D1≥H2≥
0.0D1。
In order to prevent being tempered, the fuel jet orifice of fuel nozzle 140 on duty and the distance H of inward eddy channel outlet3With inward turning
Circulation road outer diameter D1Relation be：3.0D1≥H3≥1.0D1。
As shown in Fig. 2 inward turning circulation road 130 has M rotation launder channel 150, rotation launder channel 150 has tangential swirl
Angle θ2, inward turning circulation road 130 is connected by revolving launder channel 150 with air collecting chamber, wherein, tangential swirl angle θ2Meet：30°≤
θ2≤ 60 °, M >=4, it is preferable that the cross-sectional area sum and the cross-sectional area of inward turning circulation road 130 of M rotation launder channel
Proportion：0.9-1.1.
As shown in figure 3, outward turning circulation road 120 has N number of rotation launder channel 150, rotation launder channel has tangential swirl angle
θ3, outward turning circulation road 120 is connected by revolving launder channel 150 with air collecting chamber, wherein, tangential swirl angle θ3Meet：30°≤θ3
≤ 60 °, N >=4, it is preferable that the cross-sectional area sum and the cross-sectional area of outward turning circulation road 120 of N number of rotation launder channel
Proportion：0.9-1.1.
Fuel nozzle 140 on duty has K fuel jet orifice 160, along the circumference uniform distribution of fuel nozzle 140 on duty.According to fuel quantity
Size determines the diameter of K and fuel jet orifice 160, and in general the span of the diameter of fuel jet orifice 160 is 1mm-4mm.
In one embodiment, it is 80m/s~120m/s to set and premix nozzle mixed gas outlet speed on duty, and fuel nozzle is fast
Spend for 120m/s~300m/s.Air in fuel and inward turning circulation road is carried out after quickly mixing, then with outward turning circulation road
Air mix again, gaseous mixture is inside premixing nozzle cone cover and its rear portion forms the stable flame in recirculating zone, outward turning circulation road
Air can cooling cone cover, while inward turning circulation road can also be cooled down.For relative diffusion burning, premixed flame reduces fire
Flame peak temperature, NOx emission can be reduced.
For a variety of industrial fuel gas such as natural gas, producing synthesis gas from coal, ignition delay time, flame that can be according to fuel gas
The fuel characteristics such as spread speed, fuel value adjustment blending distance H3, inner channel exports and the distance H of cone cover2And swirl angle
Degree etc., can adapt to a variety of industrial fuel gas.
It should be noted that in accompanying drawing or specification text, the implementation that does not illustrate or describe is affiliated technology
Form known to a person of ordinary skill in the art, is not described in detail in field.In addition, above-mentioned definition to each element and not only limiting
The various concrete structures mentioned in embodiment, shape, those of ordinary skill in the art simply can be changed or replaced to it
Change, such as：
(1) other constructions can also be used by premixing nozzle on duty, as long as identical function can be completed；
(2) demonstration of the parameter comprising particular value can be provided herein, but these parameters are worth accordingly without being definitely equal to, and
It is that can be similar to analog value in acceptable error margin or design constraint；
(3) direction term mentioned in embodiment, such as " on ", " under ", "front", "rear", "left", "right" etc., only it is ginseng
The direction of accompanying drawing is examined, is not used for limiting the scope of the invention；
(4) consideration that above-described embodiment can be based on design and reliability, the collocation that is mixed with each other uses or and other embodiment
Mix and match uses, i.e., the technical characteristic in different embodiments can freely form more embodiments.
Particular embodiments described above, the purpose of the present invention, technical scheme and beneficial effect are carried out further in detail
Describe in detail it is bright, should be understood that the foregoing is only the present invention specific embodiment, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc., it should be included in the guarantor of the present invention
Within the scope of shield.
Claims (10)
1. a kind of premix of gas-turbine combustion chamber nozzle on duty, including：Bore cover, outward turning circulation road, inward turning circulation road and on duty
Fuel nozzle, wherein the cone cover is arranged on the front end of the outward turning circulation road and forms a horn opening, the inward eddy
The rear end of the outward turning circulation road is stretched into the fore-end of passage and forms a hemi-closure space, the fuel nozzle on duty
It is arranged in the inward turning circulation road, the outward turning circulation road and the inward turning circulation road are all more with being uniformly distributed circumferentially
Individual rotation launder channel, multiple rotation launder channels on the inward turning circulation road are arranged on the part for not extending into the outward turning circulation road
On.
2. nozzle on duty is premixed as claimed in claim 1, it is characterised in that：The premix nozzle on duty is located at head of combustion chamber
Center, the outlet of the cone cover are concordant with main combustion unit nozzle.
3. nozzle on duty is premixed as claimed in claim 1, it is characterised in that：The outward turning circulation road, the inward turning circulation road
With the axis coinciding of the fuel nozzle on duty.
4. nozzle on duty is premixed as claimed in claim 1, it is characterised in that：The half angle θ of the cone cover1Span be
28 ° -38 °, the height H of the cone cover1Span be contour stealth outside diameter of passage D21.0-2.0 times.
5. nozzle on duty is premixed as claimed in claim 1, it is characterised in that：The area of the inward turning circulation road and the inward turning
The proportion of the area sum of circulation road and the outward turning circulation road is 50%-80%.
6. nozzle on duty is premixed as claimed in claim 1, it is characterised in that：Inward eddy channel outlet distance cone cover root away from
From with inward eddy outside diameter of passage D1Relation be：2.0D1≥H2≥0.0D1。
7. nozzle on duty is premixed as claimed in claim 1, it is characterised in that：The fuel jet orifice of the fuel nozzle on duty with it is interior
The distance H of swirl channel outlet3With inward eddy outside diameter of passage D1Relation be：3.0D1≥H3≥1.0D1。
8. nozzle on duty is premixed as claimed in claim 1, it is characterised in that：Inward turning circulation road has M rotation launder channel, institute
Stating rotation launder channel has tangential swirl angle θ2, wherein M >=4,60 ° >=θ2>=30 °, the cross-sectional area sum of M rotation launder channel
With the proportion of the cross-sectional area of the inward turning circulation road：0.9-1.1.
9. nozzle on duty is premixed as claimed in claim 1, it is characterised in that：Outward turning circulation road has N number of rotation launder channel, institute
Stating rotation launder channel has tangential swirl angle θ3, wherein N >=4,60 ° >=θ3>=30 °, the cross-sectional area sum of N number of rotation launder channel
With the proportion of the cross-sectional area of the outward turning circulation road：0.9-1.1.
10. nozzle on duty is premixed as claimed in claim 1, it is characterised in that：The fuel nozzle on duty has K fuel spray
Hole, along the circumference uniform distribution of fuel nozzle on duty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711135243.6A CN107806647A (en) | 2017-11-15 | 2017-11-15 | A kind of premix of gas-turbine combustion chamber nozzle on duty |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711135243.6A CN107806647A (en) | 2017-11-15 | 2017-11-15 | A kind of premix of gas-turbine combustion chamber nozzle on duty |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107806647A true CN107806647A (en) | 2018-03-16 |
Family
ID=61580360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711135243.6A Pending CN107806647A (en) | 2017-11-15 | 2017-11-15 | A kind of premix of gas-turbine combustion chamber nozzle on duty |
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| CN (1) | CN107806647A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386831A (en) * | 2018-04-26 | 2018-08-10 | 中国科学院工程热物理研究所 | natural gas boiler burner |
| CN109654537A (en) * | 2018-12-07 | 2019-04-19 | 中国航发沈阳发动机研究所 | A kind of central fuel nozzle |
| CN110836383A (en) * | 2019-11-15 | 2020-02-25 | 中国科学院工程热物理研究所 | High-temperature flue gas generator and control method thereof |
| CN111735077A (en) * | 2019-03-25 | 2020-10-02 | 中国航发湖南动力机械研究所 | Flame tube device, combustion chamber and engine |
| CN114754378A (en) * | 2022-06-13 | 2022-07-15 | 成都中科翼能科技有限公司 | Gas turbine combustor structure |
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| CN101644435A (en) * | 2008-08-08 | 2010-02-10 | 通用电气公司 | Lean direct injection diffusion tip and related method |
| CN102486311A (en) * | 2010-11-30 | 2012-06-06 | 通用电气公司 | System and method for premixer wake and vortex filling for enhanced flame-holding resistance |
| CN106016362A (en) * | 2016-05-16 | 2016-10-12 | 中国科学院工程热物理研究所 | Gas turbine engine mild combustor and control method thereof |
| CN207471590U (en) * | 2017-11-15 | 2018-06-08 | 中国科学院工程热物理研究所 | A kind of premix of gas-turbine combustion chamber nozzle on duty |
-
2017
- 2017-11-15 CN CN201711135243.6A patent/CN107806647A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030061815A1 (en) * | 2001-09-29 | 2003-04-03 | Young Craig Douglas | Threaded combustor baffle |
| CN101644435A (en) * | 2008-08-08 | 2010-02-10 | 通用电气公司 | Lean direct injection diffusion tip and related method |
| CN102486311A (en) * | 2010-11-30 | 2012-06-06 | 通用电气公司 | System and method for premixer wake and vortex filling for enhanced flame-holding resistance |
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| CN207471590U (en) * | 2017-11-15 | 2018-06-08 | 中国科学院工程热物理研究所 | A kind of premix of gas-turbine combustion chamber nozzle on duty |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386831A (en) * | 2018-04-26 | 2018-08-10 | 中国科学院工程热物理研究所 | natural gas boiler burner |
| CN108386831B (en) * | 2018-04-26 | 2023-11-21 | 中国科学院工程热物理研究所 | Natural gas boiler burner |
| CN109654537A (en) * | 2018-12-07 | 2019-04-19 | 中国航发沈阳发动机研究所 | A kind of central fuel nozzle |
| CN111735077A (en) * | 2019-03-25 | 2020-10-02 | 中国航发湖南动力机械研究所 | Flame tube device, combustion chamber and engine |
| CN110836383A (en) * | 2019-11-15 | 2020-02-25 | 中国科学院工程热物理研究所 | High-temperature flue gas generator and control method thereof |
| CN110836383B (en) * | 2019-11-15 | 2021-10-26 | 中国科学院工程热物理研究所 | High-temperature flue gas generator and control method thereof |
| CN114754378A (en) * | 2022-06-13 | 2022-07-15 | 成都中科翼能科技有限公司 | Gas turbine combustor structure |
| CN114754378B (en) * | 2022-06-13 | 2022-08-19 | 成都中科翼能科技有限公司 | Gas turbine combustor structure |
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