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A nozzle and a gas turbine

A technology of nozzles and fuels, applied in the direction of combustion chambers, combustion methods, combustion equipment, etc., can solve the problems of complex processing and connection, difficult maintenance and replacement, and inability to guarantee the combustion efficiency of premixed flames, and achieves easy realization, simple structure, and improved The effect of fire stabilization performance

Active Publication Date: 2018-06-05
CHINA UNITED GAS TURBINE TECH CO LTD
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Problems solved by technology

This method only improves the stability of the local recirculation zone from the perspective of aerodynamics, and only has a certain effect on the stability of the premixed flame, and due to the nature of premixed combustion, this method cannot reliably improve the flame stabilization performance of the nozzle , and it cannot guarantee that the premixed flame has higher combustion efficiency under lower load; in addition, from the perspective of processing technology, the structural processing and connection of the inner layer baffle of this premixed nozzle is relatively complicated, and it is not easy to maintain and replace

Method used

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  • A nozzle and a gas turbine
  • A nozzle and a gas turbine
  • A nozzle and a gas turbine

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Embodiment Construction

[0027] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0028] In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer" , "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention. In addition, t...

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Abstract

The invention relates to the technical field of power equipment, in particular to a nozzle and a gas turbine. The nozzle includes a central body, an annular wall and a swirl device; a peripheral mixing channel is formed between the annular wall and the central body, a central body mixing channel is opened inside the central body, and independent premixed fuel channels are also provided on the central body And the diffusion fuel channel, the premixed fuel channel injects fuel to the central body mixing channel and the peripheral mixing channel respectively to form a fuel-air mixture, and the diffusion fuel channel directly injects fuel to the flame cylinder axial direction, and finally forms a diffusion combustion in the middle at the outlet of the nozzle. Both the flame and the inner and outer layers are in the flame form of a premixed combustion flame. Under the action of diffusion combustion, the flame stability and combustion efficiency of the nozzle are greatly improved under lower load; at the same time, due to the structural improvement mainly at the outlet of the nozzle, the structure can be easily processed and maintained.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a nozzle and a gas turbine, in particular to a nozzle with an interlayer diffusion flame. Background technique [0002] With the energy shortage and the world's attention to environmental protection issues, countries have increasingly strict requirements on gas turbine combustor emissions and combustion efficiency. Generally, gas turbines are required to maintain a low level of combustion chamber emissions in the 50% and above load range. , while maintaining high combustion efficiency. In order to achieve the purpose of low emission, premixed combustion technology is widely used. Therefore, the nozzle needs to realize the pre-mixing of fuel and air, and form a fuel-air mixture at the outlet of the nozzle that is uniformly mixed and has a certain speed, and then enters the flame tube to participate in combustion. [0003] Since the fuel injected from the nozzle burns in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23R3/38
Inventor 付镇柏张珊珊查筱晨
Owner CHINA UNITED GAS TURBINE TECH CO LTD
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