CN204176682U - Gas-turbine combustion chamber premixed fuel nozzle - Google Patents

Gas-turbine combustion chamber premixed fuel nozzle Download PDF

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Publication number
CN204176682U
CN204176682U CN201420561818.6U CN201420561818U CN204176682U CN 204176682 U CN204176682 U CN 204176682U CN 201420561818 U CN201420561818 U CN 201420561818U CN 204176682 U CN204176682 U CN 204176682U
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China
Prior art keywords
centrum
fuel
gas
combustion chamber
fuel pipe
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Active
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CN201420561818.6U
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Chinese (zh)
Inventor
张珊珊
刘小龙
查筱晨
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Beijing Huatsing Gas Turbine and IGCC Technology Co Ltd
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Beijing Huatsing Gas Turbine and IGCC Technology Co Ltd
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Priority to CN201420561818.6U priority Critical patent/CN204176682U/en
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Abstract

The utility model relates to gas turbine technology field, and specifically disclose a kind of gas-turbine combustion chamber premixed fuel nozzle, comprising: centrum, centrum is hollow structure, fuel channel centered by the cavity of centrum; Diversion shell, diversion shell is enclosed within the periphery of centrum and coaxially arranged with centrum, is annular air channel between diversion shell and centrum; Radial fuel pipe, radial fuel pipe is arranged radially between centrum and diversion shell; Secondary centrum, secondary centrum to be arranged on radial fuel pipe and to be arranged in parallel with centrum, and secondary centrum is hollow structure, and the cavity of secondary centrum is by radial fuel pipe and center fuel channel connection, and secondary centrum is provided with fuel orifice.The utility model can pass through the flowing of conservative control fuel and air, produces good mixing effect, forms steady flame in nozzle downstream.

Description

Gas-turbine combustion chamber premixed fuel nozzle
Technical field
The utility model relates to gas turbine technology field, particularly relates to a kind of gas-turbine combustion chamber premixed fuel nozzle.
Background technology
Traditional gas-turbine combustion chamber adopts diffusion combustion technology, and its pollutant emission, especially discharged nitrous oxides is higher.The combustion chamber of premixed combustion technology is adopted to be used for gas turbine power generation, belong to one of clean energy technology, can while meeting generation load requirement, effectively reduce the discharge of pollutant, this wherein gas-turbine combustion chamber nozzle design for tissue burning, reduce pollutant emission particularly important.
At present, in the prior art of premixing nozzle, nozzle rear easily exists and is attached to solid wall surface and the stable whirlpool group of extended stationary periods in hybrid channel, causes the generation of tempering phenomenon, burns nozzle head, had a strong impact on reliability and the security of gas turbine.
Utility model content
(1) technical problem that will solve
The purpose of this utility model is to provide a kind of gas-turbine combustion chamber premixed fuel nozzle, solid wall surface and the stable whirlpool group of extended stationary periods in hybrid channel is attached to because nozzle rear easily exists to overcome in prior art, the problem of the generation tempering phenomenon caused, thus ensure that nozzle head is not burnt, also ensure that the safety and reliability of gas turbine.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of gas-turbine combustion chamber premixed fuel nozzle, comprising:
Centrum, described centrum is hollow structure, fuel channel centered by the cavity of described centrum;
Diversion shell, described diversion shell is enclosed within the periphery of described centrum and coaxially arranged with described centrum, is annular air channel between described diversion shell and described centrum;
Radial fuel pipe, described radial fuel pipe is arranged radially between described centrum and diversion shell;
Secondary centrum, described secondary centrum to be arranged on described radial fuel pipe and to be arranged in parallel with described centrum, described secondary centrum is hollow structure, and the cavity of described secondary centrum, by described radial fuel pipe and described center fuel channel connection, described secondary centrum is provided with fuel orifice.
Preferably, described radial fuel pipe is multiple, and multiple described radial fuel pipe is uniformly distributed circumferentially, and each described radial fuel pipe is provided with corresponding secondary centrum.
Preferably, described radial fuel pipe is 5 ~ 10.
Preferably, the epicentral fuel orifice of described pair is multiple, and multiple described fuel orifice circumferentially and/or axial arranged.
Preferably, the sectional area of described center fuel passage is 1.5 ~ 4 with the ratio of total circulation area of described fuel orifice.
Preferably, the arrival end of described diversion shell is provided with the closing in of outward extending loudspeaker.
(3) beneficial effect
Gas-turbine combustion chamber premixed fuel nozzle of the present utility model has the following advantages: centrum and secondary centrum effectively can guide air-flow, avoid being formed in nozzle mixing section being attached to solid wall surface and resting on the whirlpool group in mixing section for a long time, avoid tempering, generation in flame; Uniform fuel can spray in air duct by fuel orifice, forms good mixing effect, and then promotes the combustion stability of nozzle downstream combustion zone, reduces the discharge of nitrogen oxide simultaneously; Loudspeaker close up and can play the effect of current stabilization to air, improve the VELOCITY DISTRIBUTION in air duct, improve the mixing effect of fuel and air.This gas-turbine combustion chamber premixed fuel nozzle arrangements advantages of simple of the present utility model, versatility is good, is easy to promote the use of.
Accompanying drawing explanation
Fig. 1 is the section plan of the gas-turbine combustion chamber premixed fuel nozzle of the utility model embodiment;
Fig. 2 is the three-dimensional cutaway view of the gas-turbine combustion chamber premixed fuel nozzle of the utility model embodiment.
In figure, 1: center fuel passage; 2: annular air channel; 3: centrum; 4: diversion shell; 5: radial fuel pipe; 6: secondary centrum; 7: fuel orifice; 8: loudspeaker close up.
Detailed description of the invention
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but can not be used for limiting scope of the present utility model.
As shown in Figure 1, 2, the gas-turbine combustion chamber premixed fuel nozzle of the present embodiment comprises:
Centrum 3, centrum 3 is axial hollow structure, fuel channel 1 centered by the cavity of centrum 3;
Diversion shell 4, diversion shell 4 is enclosed within the periphery of centrum 3 and coaxially arranged with centrum 3, is annular air channel 2 between diversion shell 4 and centrum 3;
Radial fuel pipe 5, radial fuel pipe 5 is arranged radially between centrum 3 and diversion shell 4;
Secondary centrum 6, secondary centrum 6 to be arranged on radial fuel pipe 5 and to be arranged in parallel with centrum 3, namely the axis of secondary centrum 6 and the axis of centrum 3 parallel to each other, secondary centrum 6 is axial hollow structure, the cavity of secondary centrum 6 is communicated with center fuel passage 1 by radial fuel pipe 5, and secondary centrum 6 is provided with fuel orifice 7.
Radial fuel pipe 5 is multiple, and multiple radial fuel pipe 5 is uniformly distributed circumferentially, and each radial fuel pipe 5 is provided with corresponding secondary centrum 6, in the present embodiment, radial cartridge 5 is preferably 5 ~ 10.
Fuel orifice 7 on secondary centrum 6 is multiple, and multiple fuel orifice 7 circumferentially and/or axial arranged, can be that to be uniformly distributed also can be uneven distribution according to certain rules.
The sectional area of center fuel passage 1 is preferably 1.5 ~ 4 with the ratio of total circulation area of fuel orifice 8.
The arrival end (i.e. front end) of diversion shell 2 is provided with the outward extending loudspeaker closing in 8 of certain length, and loudspeaker closing in 8 can play the effect of current stabilization to air, improve the VELOCITY DISTRIBUTION in annular air channel 2, improves the mixing effect of fuel and air.
The operation principle of the gas-turbine combustion chamber premixed fuel nozzle of the present embodiment is: gas fuel enters axial center fuel passage 1, radial fuel pipe 5 is entered by the perforate of centrum 3 wall, enter secondary centrum 6 from the perforate of radial fuel pipe 5 wall again, spray from fuel orifice 7; Air is walked around loudspeaker and is closed up 8, enters annular air channel 2, mixes after radial fuel pipe 5 with fuel; Through the fuel and air mixture of even blending, flow to the downstream of annular air channel 2 vertically, under the effect of centrum 3 and secondary centrum 6, flow regime is improved, and eliminates tempering and stays the generation of flame.
Gas-turbine combustion chamber premixed fuel nozzle of the present utility model has the following advantages: centrum and secondary centrum effectively can guide air-flow, avoid being formed in nozzle mixing section being attached to solid wall surface and resting on the whirlpool group in mixing section for a long time, avoid tempering, generation in flame; Uniform fuel can spray in air duct by fuel orifice, forms good mixing effect, and then promotes the combustion stability of nozzle downstream combustion zone, reduces the discharge of nitrogen oxide simultaneously; Loudspeaker close up and can play the effect of current stabilization to air, improve the VELOCITY DISTRIBUTION in air duct, improve the mixing effect of fuel and air.This gas-turbine combustion chamber premixed fuel nozzle arrangements advantages of simple of the present utility model, versatility is good, is easy to promote the use of.
Embodiment of the present utility model provides for the purpose of example and description, and is not exhaustively or by the utility model be limited to disclosed form.Many modifications and variations are apparent for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present utility model and practical application are better described, and enables those of ordinary skill in the art understand the utility model thus design the various embodiments with various amendment being suitable for special-purpose.

Claims (6)

1. a gas-turbine combustion chamber premixed fuel nozzle, is characterized in that, comprising:
Centrum, described centrum is hollow structure, fuel channel centered by the cavity of described centrum;
Diversion shell, described diversion shell is enclosed within the periphery of described centrum and coaxially arranged with described centrum, is annular air channel between described diversion shell and described centrum;
Radial fuel pipe, described radial fuel pipe is arranged radially between described centrum and diversion shell;
Secondary centrum, described secondary centrum to be arranged on described radial fuel pipe and to be arranged in parallel with described centrum, described secondary centrum is hollow structure, and the cavity of described secondary centrum, by described radial fuel pipe and described center fuel channel connection, described secondary centrum is provided with fuel orifice.
2. gas-turbine combustion chamber premixed fuel nozzle according to claim 1, is characterized in that, described radial fuel pipe is multiple, and multiple described radial fuel pipe is uniformly distributed circumferentially, and each described radial fuel pipe is provided with corresponding secondary centrum.
3. gas-turbine combustion chamber premixed fuel nozzle according to claim 2, is characterized in that, described radial fuel pipe is 5 ~ 10.
4. gas-turbine combustion chamber premixed fuel nozzle according to claim 2, is characterized in that, the epicentral fuel orifice of described pair is multiple, and multiple described fuel orifice circumferentially and/or axial arranged.
5. gas-turbine combustion chamber premixed fuel nozzle according to claim 1, is characterized in that, the sectional area of described center fuel passage is 1.5 ~ 4 with the ratio of total circulation area of described fuel orifice.
6. according to the gas-turbine combustion chamber premixed fuel nozzle in claim 1-5 described in any one, it is characterized in that, the arrival end of described diversion shell is provided with outward extending loudspeaker and closes up.
CN201420561818.6U 2014-09-26 2014-09-26 Gas-turbine combustion chamber premixed fuel nozzle Active CN204176682U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420561818.6U CN204176682U (en) 2014-09-26 2014-09-26 Gas-turbine combustion chamber premixed fuel nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420561818.6U CN204176682U (en) 2014-09-26 2014-09-26 Gas-turbine combustion chamber premixed fuel nozzle

Publications (1)

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CN204176682U true CN204176682U (en) 2015-02-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104315540A (en) * 2014-09-26 2015-01-28 北京华清燃气轮机与煤气化联合循环工程技术有限公司 Premixing fuel spray nozzle of combustion chamber of gas turbine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104315540A (en) * 2014-09-26 2015-01-28 北京华清燃气轮机与煤气化联合循环工程技术有限公司 Premixing fuel spray nozzle of combustion chamber of gas turbine
CN104315540B (en) * 2014-09-26 2018-05-25 北京华清燃气轮机与煤气化联合循环工程技术有限公司 Gas-turbine combustion chamber premixes fuel nozzle

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Premixing fuel spray nozzle of combustion chamber of gas turbine

Effective date of registration: 20161104

Granted publication date: 20150225

Pledgee: Tsinghua Holdings Co., Ltd.

Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd.

Registration number: 2016990000853

PLDC Enforcement, change and cancellation of contracts on pledge of patent right or utility model
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20191211

Granted publication date: 20150225

Pledgee: Tsinghua Holdings Co., Ltd.

Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd.

Registration number: 2016990000853

PC01 Cancellation of the registration of the contract for pledge of patent right