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Fuel injector and gas turbine

A fuel injection device and fuel technology, which are applied to gas fuel burners, burners, combustion chambers, etc., can solve the problems of reduced combustion stability, increased component cost, combustion vibration, etc., and achieve the effect of suppressing lengthening.

Active Publication Date: 2019-12-06
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the pre-mixing tube becomes longer, the cost of components may increase, or combustion stability may decrease, resulting in combustion vibration

Method used

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  • Fuel injector and gas turbine
  • Fuel injector and gas turbine
  • Fuel injector and gas turbine

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0091] Next, a fuel injection device and a gas turbine according to a first embodiment of the present invention will be described based on the drawings.

[0092] figure 1 It is a configuration diagram showing a schematic configuration of a gas turbine according to an embodiment of the present invention.

[0093] Such as figure 1 As shown, the gas turbine 100 of this embodiment includes a compressor 51 , a plurality of combustors 52 and a turbine 53 .

[0094] The compressor 51 generates compressed air A by compressing the outside air Ao. The compressor 51 has a compressor rotor 56 , a compressor chamber 57 and a plurality of compressor stationary blade cascades 58 .

[0095] The compressor rotor 56 rotates about the gas turbine axis Ar. The compressor rotor 56 has a compressor rotor shaft 59 and a plurality of compressor moving blade cascades 60 . The compressor rotor shaft 59 extends along the gas turbine axis Ar. A plurality of compressor moving blade cascades 60 are a...

no. 2 approach

[0137] Next, a second embodiment of the present invention will be described based on the drawings. The fuel injection device of the second embodiment differs from the fuel injection device 1 of the first embodiment described above only in the structure of the guide portion. Therefore, citing figure 2 The same reference numerals will be assigned to the same parts as those in the first embodiment described above, and overlapping descriptions will be omitted.

[0138] The fuel injection device of the second embodiment includes a fuel supply pipe 8 , a plurality of premixing pipes 202 , an upstream side plate 3 , a downstream side plate 4 , and an outer side wall 5 as in the first embodiment.

[0139] Figure 5 is the second embodiment of the present invention and Figure 4 Quite a graph.

[0140] Such as Figure 5 As shown, the premixing tube 202 is formed along the axis direction Da (refer to figure 2 ) Extended cylindrical shape. The premixing tube 202 includes a tube ...

no. 3 approach

[0152] Next, a third embodiment of the present invention will be described based on the drawings. The fuel injection device of the third embodiment differs from the first and second embodiments only in the structure of the guide portion. Therefore, citing figure 2 , the same reference numerals will be assigned to the same parts as those in the second embodiment, and repeated descriptions will be omitted.

[0153] Figure 7 is the third embodiment of the present invention and Figure 4 Quite a graph.

[0154] Such as Figure 7 As shown, the premixing pipe 302 of the fuel injection device according to the third embodiment includes a pipe main body 21 and a guide portion 22 .

[0155] The end 2a of the pipe main body 21 at the upstream side Da1 (refer to figure 2 ) includes a through-hole 23 that communicates the internal space S1 and the external space S2.

[0156] The guide part 22 guides the air A introduced into the internal space S1 of the pipe main body 21 through ...

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Abstract

A fuel injector and a gas turbine are provided. The fuel injector includes a premix tube (2), a fuel introduction unit, and a downstream side plate. The premix tube (2) includes a tube body (21) and aguide part (22). In the tube body (21), a through-hole (23) which allows communication between an internal space and an external space (S2) is formed at an upstream side end part (2a) on a side closeto the inlet port (2A). The guide part (22) extends from an end part (23a) of the through-hole (23) in a circumferential direction centered on an axis (A2) of the premix tube (2) to intersect both the circumferential direction and an axial direction (Da) in which the axis (A2) extends.

Description

technical field [0001] The present invention relates to a fuel injection device and a gas turbine. Background technique [0002] Fuel injection devices such as gas turbines and boilers often supply a mixture gas in which compressed air and fuel gas have been mixed in advance to the combustor. [0003] Patent Document 1 discloses a fuel injection device that injects a mixture of compressed air and fuel gas from a plurality of injection holes regularly formed on a circular substrate. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent Laid-Open No. 2016-080214 [0007] In the fuel injection device described in Patent Document 1, it is desirable to uniformly mix compressed air and fuel gas in order to achieve low NOx (nitrogen oxides). Specifically, it is preferable that the compressed air and the fuel gas are uniformly mixed before reaching the plurality of injection holes of the fuel injection device. [0008] However, when...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/28F23R3/38
CPCF23R3/286F23R3/38F23D14/62
Inventor 多田胜义
Owner MITSUBISHI HEAVY IND LTD
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