CN105180214B - A kind of dual fuel nozzle of incendivity low-BTU gas and cyclone integral structure - Google Patents
A kind of dual fuel nozzle of incendivity low-BTU gas and cyclone integral structure Download PDFInfo
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- CN105180214B CN105180214B CN201510607830.5A CN201510607830A CN105180214B CN 105180214 B CN105180214 B CN 105180214B CN 201510607830 A CN201510607830 A CN 201510607830A CN 105180214 B CN105180214 B CN 105180214B
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Abstract
It is an object of the invention to provide a kind of dual fuel nozzle of incendivity low-BTU gas and cyclone integral structure, including fuel injection system, gas injection system, hydrocyclone system, oil line pipe, oil circuit packing ring, oil circuit spring, oil circuit cyclone is sequentially connected and all in working connection outer wall, gas path pipe is connected with gas circuit outer wall and is arranged on the outside of working connection outer wall, gas path pipe, gas circuit outer wall and working connection outer wall constitute gas channels, the end of gas channels sets one to enclose swirl vane, the outside of the circle swirl vane sets cyclone housing, swirl vane is hollow-core construction, the trailing edge of swirl vane sets blade trailing edge spray-hole, the windward side of swirl vane sets blade windward side spray-hole.The dual fuel nozzle of the present invention is that fuel oil can be used as fuel, and the low-BTU gas rich in non-combustible gas can be used again as fuel, can overheavy firing effect, the stable burning of the gaseous fuel under big flow can be met again.
Description
Technical field
The present invention relates to the fuel injection device of a kind of gas turbine, specifically gas turbine.
Background technology
With the exhaustion of global fossil fuel, the substitutability fuel of search for oil is extremely urgent, with technology
Develop, the low calorific value gas fuel rich in non-combustible gas such as oven gas, rubbish landfill gas, mine gas gas is increasingly becoming combustion gas
The available fuel of turbine, but there is problems with when using the gas：1) the larger combustion field of gaseous fuel flow velocity is difficult
Tissue；2) easily occur rich in inert gas burning unstable or even flame-out；3) gas turbine needs to use liquid fuel to be opened
It is dynamic.Therefore, gas-turbine combustion chamber must be transformed using low-BTU gas as combustion engine fuel.
Nozzle as the critical component in combustion chamber, its performance directly influence burning Indoor Flow Field tissue, efficiency of combustion,
The problems such as flame failure limit.Simultaneously when using low-BTU gas, there are a variety of different combustion types in combustion chamber：1) combustion fluid
Body fuel；2) combustion of liquid fuel oil is while re-injection water vapour；3) combustion of liquid fuel oil burns simultaneously is rich in the low-heat of inert gas
It is worth gaseous fuel；4) low calorific value gas fuel of the burning rich in inert gas.
In conventional patent, a part is the dual fuel nozzle of the only gaseous fuel of the different calorific values of incendivity, a part
Only it is the dual fuel nozzle of acylic motion device, and gaseous fuel needs to enter combustion chamber by multiple passages, causes nozzle arrangements
It is complicated.And because the flow using the low-BTU gas rich in non-combustible gas is larger, the miscibility of conventional dual fuel nozzle
Can be poor, it is difficult tissue burning.
The content of the invention
In the case of oil circuit nozzle and cyclone physical dimension is not changed, while meeting combustion
Liquid fuel, re-injection water vapour and burn gas fuel are burnt, and the same of burning can be stablized when gas fuel flow rate is larger
When ensure higher efficiency of combustion, while a kind of incendivity low heat value of the target of low emission can be realized in re-injection water vapour
The dual fuel nozzle of gas and cyclone integral structure.
The object of the present invention is achieved like this：
A kind of dual fuel nozzle of incendivity low-BTU gas of the present invention and cyclone integral structure, it is characterized in that：Bag
Include fuel injection system, gas injection system, hydrocyclone system, the fuel injection system include oil line pipe, oil circuit packing ring,
Working connection outer wall, oil circuit spring, oil circuit cyclone, gas injection system include gas path pipe, gas circuit outer wall, hydrocyclone system bag
Include cyclone housing, swirl vane；Oil line pipe, oil circuit packing ring, oil circuit spring, oil circuit cyclone are sequentially connected and all installed
In working connection outer wall, gas path pipe is connected with gas circuit outer wall and is arranged on outside the outside of working connection outer wall, gas path pipe, gas circuit
Wall and working connection outer wall constitute gas channels, and the end of gas channels sets one to enclose swirl vane, the outside of the circle swirl vane
Cyclone housing is set, and swirl vane is hollow-core construction, and the trailing edge of swirl vane sets blade trailing edge spray-hole, swirl vane
Windward side sets blade windward side spray-hole.
The present invention can also include：
1st, cyclone housing exterior walls are the constant straight pipe type structure of diameter, and cyclone inner walls are what diameter gradually increased
Divergent type structure.
2nd, the setting angle of swirl vane is 35 ° of -55 ° of degree, and swirl vane number is 12-15 pieces, blade trailing edge spray-hole
With a diameter of 0.3-0.6mm of blade windward side spray-hole, it is shaped as circular hole, square hole, elliptical aperture, star-like hole；Blade is windward
Face spray-hole is made up of 6-10 rows, and arrangement mode is arranged, is staggered for in-line arrangement, radial arrangement, and often row is 8-14；Blade
Trailing edge spray-hole is arranged for 1-2, and often row has 5-13, and arrangement mode is that in-line arrangement arranges or is staggered.
3rd, when fuel is fuel oil, fuel oil is injected into by oil line pipe into oil circuit cyclone by cyclone housing
Burnt in combustion chamber, during re-injection water vapour, water vapour enters hydrocyclone system by gas channels, respectively from blade windward
Face spray-hole and blade trailing edge spray-hole are injected into combustion chamber through cyclone housing；When fuel is gaseous fuel, gas combustion
Material enters hydrocyclone system through gas channels, and gaseous fuel is divided into two-way afterwards, and gaseous fuel sprays through blade windward side all the way
Hole forms the injection that liquidates with the air in cyclone equipment shell body, and another road gaseous fuel enters combustion chamber through blade trailing edge spray-hole；
When fuel is gaseous fuel and fuel oil, fuel oil essence oil line pipe is injected into combustion into oil circuit cyclone by cyclone housing
Burn interior to be burnt, gaseous fuel enters hydrocyclone system through gas channels, and gaseous fuel is divided into two-way afterwards, all the way gas
Fuel forms the injection that liquidates through the air in blade windward side spray-hole and cyclone equipment shell body, and another road gaseous fuel is through blade tail
Edge spray-hole enters combustion chamber.
Advantage of the invention is that：The present invention does not change oil circuit nozzle and cyclone physical dimension, can be to combustion chamber
Combustion chamber is transform as suitable for low calorie fuels of the burning rich in inert gas in the case of changing minimum.By to double fuel
Nozzle and cyclone carry out integrated design, keep not changing the contour dimension of oil circuit nozzle and cyclone, by swirler blades
Hollow blade is designed to, and gas circuit spray-hole is opened up on hollow swirl vane, gaseous fuel is divided into two-way, strengthens mixing all the way
Mixed, overheavy firing effect makes burning more complete；Strengthen eddy flow effect all the way, increase recirculating zone shortens the length of flame, makes combustion chamber
Outlet temperature is more uniform.Gas system can also reduce burning room temperature by re-injection water vapour in combustion of liquid fuel simultaneously
Degree, so as to reduce NOxDischarge.
Brief description of the drawings
Fig. 1 is stereogram of the invention；
Fig. 2 is sectional view of the invention.
Embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
With reference to Fig. 1~2, the present invention is using a kind of dual fuel nozzle of incendivity low-BTU gas knot integrated with cyclone
Structure, the integral structure is made up of gas injection system, fuel injection system, cyclone.Its technical characterstic is in combustion of liquid
During fuel, fuel is sprayed by fuel system；In re-injection water vapour, water vapour is met through gas injection system positioned at swirler blades
The spray-hole of wind face and trailing edge is injected into combustion chamber；In burn gas fuel, gaseous fuel is divided into two-way, and a route is located at
The spray-hole of swirler blades windward side ejects to strengthen the blending with air, spray of the route positioned at swirler blades trailing edge
Perforation injection is burnt with producing eddy flow to stablize.
The dual fuel nozzle for the incendivity low-BTU gas that the present invention is designed mainly includes gas with cyclone integral structure
Body spraying system 100, fuel injection system 200 and the part of cyclone 300 3, wherein gas injection system are included by gas circuit pipe
Gas channels and blade trailing edge spray-hole 7 and blade windward side spray-hole that road 9, gas circuit outer wall 11 are constituted with working connection outer wall 12
The gas jetting hole of 8 compositions.Fuel injection system include oil line pipe 1, oil circuit packing ring 2, oil circuit spring 3, oil circuit cyclone 6,
Oil circuit cyclone housing 10, oil circuit outer wall 12.Cyclone includes swirl vane 13, cyclone circuit 5, cyclone housing 4.
The dual fuel nozzle for the incendivity low-BTU gas that the present invention is designed is to spray gas with cyclone integral structure
Penetrate system 100, fuel injection system 200 and the part of cyclone 300 3 and carry out integrated design, three parts are common for interdependence
With design, the gas flow area specially in gas injection system be by burn gas fuel when the flow of gaseous fuel determine
It is fixed, and then determine the number and the blade angle of arrangement, thus decision cyclone of the spray-hole in gas injection system
Degree and lobe numbers, while the blade angle degree and number of cyclone, can act on combustion field, and then influence gaseous fuel again
Combustion process, influence in turn can stablize the maximum gas fuel flow rate of burning, therefore will be to incendivity low-BTU gas
Dual fuel nozzle carries out integrated design with cyclone.
The dual fuel nozzle for the incendivity low-BTU gas that the present invention is designed and cyclone group in cyclone integral structure
Part includes gas circuit outer wall 11, swirl vane 13, cyclone circuit 5, cyclone housing 4, and the cyclone is integrally using the side of casting
Formula is processed, and the internal diameter of cyclone circuit 5 is gradually increased to divergent type structure；The external diameter of cyclone shell body 4 keeps not being changed into straight tube
Type structure；Swirler blades are the gas that hollow blade and connection are made up of gas path pipe 9, gas circuit outer wall 11 with working connection outer wall 12
Paths, the setting angle of swirl vane is 35 ° of -55 ° of degree, and swirl vane number is 12-15 pieces；Gaseous fuel/water vapour warp
Gas channels enter after hollow swirl vane 13 spray-hole 7 for passing through spray-hole 8 and blade trailing edge positioned at swirl vane windward side
Combustion chamber is injected into, wherein spray-hole 8 serves the blending strengthened between gaseous fuel and air and acted on；Spray-hole 7 is played
Strengthen the effect of combustion chamber inward eddy, the method that two-way enters combustion chamber is divided into by this pure gas runner, compared to
The thinking that traditional dual fuel nozzle is separately designed with cyclone, the present invention can be both played between the burning of reinforcement gas and air
Blending effect enhances burning, and the swirl strength in strengthen burning room is served again and stabilizes burning, while having accomplished that structure is tight
Gather, it is rationally distributed.Swirler blades windward with trailing edge hole using electric spark mode processed by face, a diameter of 0.3-0.6mm, spray
The shape of perforation can be circular hole, square hole, elliptical aperture, star-like hole etc.；Spray-hole 8 positioned at blade windward side is made up of 6-10 rows,
The arrangement mode of spray-hole is arranged, is staggered for in-line arrangement, radial arrangement, and often row is 8-14；Positioned at the spray of blade trailing edge
Perforation 7 is arranged for 1-2, and often row has 5-13, and arrangement mode is that in-line arrangement arranges or is staggered.Gas path pipe 9 is circular straighttube
Be all straight tube gas circuit outer wall 11 between linked using screw thread.Oil circuit outer wall 12 is fit into cyclone center baffle
After oil circuit mounting surface, the two is fixed using welding manner.Oil circuit cyclone housing 10, oil circuit cyclone 6, oil circuit spring 3, oil circuit
Packing ring 2 is fastened to be fit into inside oil circuit outer wall 12 successively and fixed, and oil piping system is held out against by oil line pipe 1, oil line pipe 1 and oil
Use and be screwed between road outer wall 12.
The dual fuel nozzle of incendivity low-BTU gas designed by the present invention is worked with cyclone integral structure
Journey is as follows：
1) when the dual fuel nozzle of the incendivity low-BTU gas designed by the present invention only makes with cyclone integral structure
During with fuel oil as fuel, fuel oil is injected into combustion chamber by oil circuit inwall 1 into oil circuit cyclone 6 to be burnt.
After flameholding, combustion chamber can be entered by gas injection system re-injection water vapour, specially high-temperature water vapor passes through gas circuit
Outer wall 9,11 enters in hollow swirl vane with the gas paths that working connection outer wall 12 is constituted, and is met from positioned at swirler blades
The spray-hole 8 in wind face and the spray-hole 7 of blade trailing edge are injected into combustion chamber, to reach reduction ignition temperature, so that the row of reduction
The purpose put.
2) when the dual fuel nozzle of the incendivity low-BTU gas designed by the present invention only makes with cyclone integral structure
During with gaseous fuel as fuel, the gas channels that gaseous fuel is constituted via gas circuit outer wall 9,11 and working connection outer wall 12 enter
In hollow swirler blades, now gaseous fuel is divided into two-way, and gaseous fuel is via blade windward side spray-hole 8 and eddy flow all the way
Air in device passage forms the injection that liquidates, and strengthens blending, reformation gas and air formation is premixed gas or half premix gas entrance
Burning is participated in combustion chamber；Another road gaseous fuel is injected into combustion chamber via blade trailing edge spray-hole 7, portion gas combustion
The cyclonic action that material is produced plays the effect of stable flame overheavy firing.
3) when the incendivity low-BTU gas designed by the present invention dual fuel nozzle and cyclone integral structure simultaneously
During using gaseous fuel and liquid fuel, fuel oil enters oil circuit cyclone 6 by oil circuit inwall 1 and is injected into progress in combustion chamber
Burning.The gas channels that gaseous fuel is constituted via gas circuit outer wall 9,11 and working connection outer wall 12 enter hollow swirler blades
Interior, now gaseous fuel is divided into two-way, and gaseous fuel is via the air in blade windward side spray-hole 8 and swirler passages all the way
Formation liquidates injection, strengthens blending, reformation gas is entered with air formation premix gas or half premix gas and combustion is participated in combustion chamber
Burn, high-temperature region is formed on head and strengthens evaporation of the liquid fuel on head；Another road gaseous fuel is via blade trailing edge spray-hole 7
Combustion chamber is injected into, the cyclonic action that the portion gas fuel is produced, and produce recirculating zone and play stable flame overheavy firing
Effect, while liquid fuel can contribute to the abundant burning of liquid fuel by abundant atomization and vaporization in the recirculating zone.
The present invention can be realized using above technical scheme is ensureing that oil circuit nozzle and cyclone physical dimension are constant
In the case of, by the dual fuel nozzle to incendivity low-BTU gas and cyclone integrated design, only with a gas
Fuel flow channel come realize water vapour re-injection, rich in non-combustible gas low calorie fuels burning, by using dual fuel nozzle with
The thinking of cyclone integrated design, gas injection system is opened up in hollow swirler blades, and gas is divided into two-way enters
Enter combustion chamber, the spray-hole that gas is passed through positioned at swirler blades windward side all the way enters combustion chamber, strengthens gaseous fuel and air
Blending effect, overheavy firing；Gas burning all the way enters combustion chamber via the spray-hole positioned at cyclone trailing edge, strengthens eddy flow
Effect, plays a part of stable burning.Because the invention strengthens the blending of gaseous fuel and air, while it is strong to enhance eddy flow
Degree increases recirculating zone, therefore the invention contributes to the more thoroughly complete of burning, makes CO discharge reductions.Simultaneously the present invention due to
There is gas injection system, fuel injection system simultaneously, therefore combustion of liquid fuel, gaseous fuel and liquid combustion can be met
The situation of material and gaseous fuel multifuel combustion.Because the invention is when using liquid fuel combustion, gas channels reinjected water can be passed through
Steam enters interior during burning, declines ignition temperature, therefore the invention is provided simultaneously with reducing the advantage of NOx emission.
Gas channels are coaxially arranged with liquid fuel passage, and gaseous fuel sprays from the gaseous fuel of hollow swirler blades
Combustion chamber is injected into hole and participates in burning；Liquid fuel is injected into combustion chamber by oil circuit and participates in burning, is using liquid
During fuel combustion, water vapour can be sprayed by fuel gas passage and enter combustion chamber.
Swirler blades are hollow blade.
Gas is divided into two-way and enters combustion chamber in gas injection system, all the way via positioned at the windward side of swirl vane；One
Road is via the trailing edge positioned at swirler blades.
Gas fuel orifice is respectively on the windward side and trailing edge of swirl vane.
Claims (3)
1. a kind of dual fuel nozzle of incendivity low-BTU gas and cyclone integral structure, it is characterized in that：Including fuel oil spray
Penetrate system, gas injection system, hydrocyclone system, the fuel injection system includes oil line pipe, oil circuit packing ring, outside working connection
Wall, oil circuit spring, oil circuit cyclone, gas injection system include gas path pipe, gas circuit outer wall, and hydrocyclone system includes cyclone
Housing, swirl vane；Oil line pipe, oil circuit packing ring, oil circuit spring, oil circuit cyclone are sequentially connected and all installed in working connection
In outer wall, gas path pipe is connected with gas circuit outer wall and is arranged on the outside of working connection outer wall, gas path pipe, gas circuit outer wall and main oil
Road outer wall constitutes gas channels, and the end of gas channels sets one to enclose swirl vane, and the outside of the circle swirl vane sets eddy flow
Device housing, swirl vane is hollow-core construction, and the trailing edge of swirl vane sets blade trailing edge spray-hole, and the windward side of swirl vane is set
Put blade windward side spray-hole；
Cyclone housing exterior walls are the constant straight pipe type structure of diameter, and cyclone inner walls are the flaring type that diameter gradually increases
Structure.
2. a kind of dual fuel nozzle of incendivity low-BTU gas according to claim 1 and cyclone integral structure,
It is characterized in that：The setting angle of swirl vane be 35 ° -55 ° degree, swirl vane number be 12-15 pieces, blade trailing edge spray-hole and
A diameter of 0.3-0.6mm of blade windward side spray-hole, it is shaped as circular hole, square hole, elliptical aperture or star-like hole；Blade windward side
Spray-hole is made up of 6-10 rows, and arrangement mode is arranged, is staggered for in-line arrangement, radial arrangement, and often row is 8-14；Blade tail
Edge spray-hole is arranged for 1-2, and often row has 5-13, and arrangement mode is that in-line arrangement arranges or is staggered.
3. a kind of dual fuel nozzle of incendivity low-BTU gas according to claim 1 or 2 knot integrated with cyclone
Structure, it is characterized in that：When fuel is fuel oil, fuel oil is injected into by oil line pipe into oil circuit cyclone by cyclone housing
Enter in combustion chamber and burnt, during re-injection water vapour, water vapour enters hydrocyclone system by gas channels, is met respectively from blade
Wind face spray-hole and blade trailing edge spray-hole are injected into combustion chamber through cyclone housing；When fuel is gaseous fuel, gas
Fuel enters hydrocyclone system through gas channels, and gaseous fuel is divided into two-way afterwards, and gaseous fuel sprays through blade windward side all the way
Perforation forms the injection that liquidates with the air in cyclone equipment shell body, and another road gaseous fuel enters through blade trailing edge spray-hole to burn
Room；When fuel is gaseous fuel and fuel oil, fuel oil is injected into through oil line pipe into oil circuit cyclone by cyclone housing
Enter in combustion chamber and burnt, gaseous fuel enters hydrocyclone system through gas channels, gaseous fuel is divided into two-way afterwards, all the way
Gaseous fuel forms the injection that liquidates through the air in blade windward side spray-hole and cyclone equipment shell body, and another road gaseous fuel is through leaf
Piece trailing edge spray-hole enters combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510607830.5A CN105180214B (en) | 2015-09-23 | 2015-09-23 | A kind of dual fuel nozzle of incendivity low-BTU gas and cyclone integral structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510607830.5A CN105180214B (en) | 2015-09-23 | 2015-09-23 | A kind of dual fuel nozzle of incendivity low-BTU gas and cyclone integral structure |
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| Publication Number | Publication Date |
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| CN105180214A CN105180214A (en) | 2015-12-23 |
| CN105180214B true CN105180214B (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510607830.5A Active CN105180214B (en) | 2015-09-23 | 2015-09-23 | A kind of dual fuel nozzle of incendivity low-BTU gas and cyclone integral structure |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110420768B (en) * | 2018-12-04 | 2024-04-30 | 西安成立航空制造有限公司 | Swirler for nozzle |
| CN113251439B (en) * | 2021-06-24 | 2021-11-16 | 成都中科翼能科技有限公司 | Double-stage co-rotating head device for dual-fuel gas turbine |
| CN114543118B (en) * | 2022-02-21 | 2023-04-25 | 中国航发贵阳发动机设计研究所 | Centrifugal starting nozzle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203010676U (en) * | 2012-12-24 | 2013-06-19 | 哈尔滨汽轮机厂有限责任公司 | Unit nozzle for mass-flow medium-and-low heat value fuel |
| CN103175221A (en) * | 2013-03-19 | 2013-06-26 | 哈尔滨工程大学 | Gas-assisted dual-fuel nozzle used for chemical regenerative cycle |
| CN205208630U (en) * | 2015-09-23 | 2016-05-04 | 哈尔滨工程大学 | Dual fuel nozzle and swirler integral structure of low -BTU gas can burn |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6898938B2 (en) * | 2003-04-24 | 2005-05-31 | General Electric Company | Differential pressure induced purging fuel injector with asymmetric cyclone |
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2015
- 2015-09-23 CN CN201510607830.5A patent/CN105180214B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203010676U (en) * | 2012-12-24 | 2013-06-19 | 哈尔滨汽轮机厂有限责任公司 | Unit nozzle for mass-flow medium-and-low heat value fuel |
| CN103175221A (en) * | 2013-03-19 | 2013-06-26 | 哈尔滨工程大学 | Gas-assisted dual-fuel nozzle used for chemical regenerative cycle |
| CN205208630U (en) * | 2015-09-23 | 2016-05-04 | 哈尔滨工程大学 | Dual fuel nozzle and swirler integral structure of low -BTU gas can burn |
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