Gas turbine low-pollution combustion chamber single-vortex head structure

A gas turbine, low-pollution technology, applied in combustion chambers, continuous combustion chambers, combustion methods, etc., can solve the problems of head structure spontaneous combustion, oscillating combustion, head outlet tempering, etc., to reduce the risk of spontaneous combustion and improve mixing uniformity Speed, the effect of increasing speed

Active Publication Date: 2018-01-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: the risk of oscillating combustion, the occurrence of flashbacks a

Method used

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  • Gas turbine low-pollution combustion chamber single-vortex head structure
  • Gas turbine low-pollution combustion chamber single-vortex head structure
  • Gas turbine low-pollution combustion chamber single-vortex head structure

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Embodiment Construction

[0027] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0028] The solution adopted by the present invention to solve the technical problem is: a lean-burn premixed single-swirl head solution for a low-pollution combustion chamber of a ground gas turbine fueled by natural gas, including a central swirling air supply part, a central natural gas supply gas part, non-swirling air supply part on the outer wall, natural gas supply part on the outer wall, natural gas-air mixing chamber, head outlet convergence section, head mixed gas outlet. The central swirling air part includes axial flow swirler, swirler blade, central swirling air inlet, and swirler outlet baffle; the central natural gas supply part includes central natural gas inlet, central natural gas injection boss, central natural gas Injection hole: The air passes through the cyclone to generate a swirl flow, then accelerates through the converging section of the ...

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Abstract

The invention relates to a gas turbine low-pollution combustion chamber single-vortex head structure. Firstly, central vortex air and central natural gas are mixed, and outer wall non-vortex air and outer wall natural gas are mixed. After that, the vortex air, the non-vortex air, the central natural gas and the outer wall natural gas are further mixed in a natural gas-air mixing cavity, the mixinguniformity of the natural gas and air can be improved, generation of hot spots can be avoided, and generation of nitric oxide is effectively lowered. By means of the gas supply mode of combination ofcentral vortex and outer wall non-vortex, the vortex intensity of head outlet airflow can be lowered, and the risk of occurrence of oscillation combustion is also lowered. By means of the combinationof the central natural gas and outer wall natural gas, the NOx-CO proportion can be improved, and flame stability is facilitated. A head outlet convergence section can improve the speed of natural gas-air mixed airflow, and tempering is effectively prevented. A tangential gas inlet small hole in the outer wall of a whirlcone can lower the risk of spontaneous combustion occurring inside the head structure.

Description

technical field [0001] The invention belongs to the head structure of a combustion chamber of a gas turbine, and relates to a single-swirl head structure of a low-pollution combustion chamber of a gas turbine, in particular to a lean-burn premixed single-swirl head scheme of a low-pollution combustion chamber using natural gas as fuel. Background technique [0002] In recent years, as environmental problems such as smog and global warming have become increasingly serious and people's awareness of environmental protection has become stronger, the requirements for pollutant emissions from aero-engines and ground gas turbines have become more and more stringent, especially for ground gas turbines. emissions requirements are more stringent. At present, in most cases, the pollutant emission requirements for ground gas turbines fueled by natural gas are: NO x <25ppm, CO<50ppm (converted to exhaust gas concentration 15%O 2 The ppm value below), and requires any operating po...

Claims

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Application Information

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IPC IPC(8): F23R3/14F23R3/28
Inventor 索建秦孙付军梁红侠黎明李乐于涵
Owner NORTHWESTERN POLYTECHNICAL UNIV
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