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Premixing duty nozzle of combustion chamber of gas turbine

A technology for on-duty nozzles and gas turbines, applied in combustion chambers, continuous combustion chambers, combustion methods, etc., can solve the problems of high temperature and tempering of the nozzle wall surface, achieve low flame peak temperature, reduce NOx emissions, and facilitate application and operation

Inactive Publication Date: 2018-03-16
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the premixed duty flame is easy to cause flashback and high temperature on the nozzle wall. How to design the premixed duty nozzle is the key

Method used

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  • Premixing duty nozzle of combustion chamber of gas turbine
  • Premixing duty nozzle of combustion chamber of gas turbine
  • Premixing duty nozzle of combustion chamber of gas turbine

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Embodiment Construction

[0032] On the premise of ensuring the combustion efficiency and performance of the combustion chamber, the invention can realize ultra-low nitrogen oxide emission in a wide load range by optimizing the nozzle on duty, especially can reduce the NOx emission of the combustion chamber under the low working condition of the combustion chamber , the premix duty nozzle has a compact structure and is suitable for the combustion of natural gas, coal-to-synthesis gas and other low-to-medium calorific value synthesis gases.

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0034] see Figure 1-Figure 3 , the embodiment of the present invention provides a premix duty nozzle 100 , including: a cone 110 , an outer swirl passage 120 , an inner swirl passage 130 and a duty fuel nozzl...

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Abstract

The invention discloses a premixing duty nozzle of a combustion chamber of a gas turbine. The premixing duty nozzle comprises a cone cover, an outer vortex channel, an inner vortex channel and a dutyfuel nozzle; the cone cover is arranged at the front end of the outer vortex channel and thus a horn-shaped opening is formed; the front end of the inner vortex channel partly stretches into the rearend of the outer vortex channel and a semi-closed space is formed; the duty fuel nozzle is formed in the inner vortex channel; the outer vortex channel and the inner vortex channel are each provided with a plurality of vortex groove channels evenly distributed in the circumferential direction; and the multiple vortex groove channels in the inner vortex channel are formed in the part, not stretching into the outer vortex channel, of the inner vortex channel. A fuel and air are mixed uniformly at an outlet of the premixing duty nozzle, the flame peak temperature is low, the load range of the premixing duty nozzle can be extended advantageously, and NOx emissions are reduced.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to a premixed duty nozzle of a combustion chamber of a gas turbine. Background technique [0002] Nitrogen oxides include nitrous oxide, nitrogen monoxide, and nitrogen dioxide. Nitrogen oxides, as the main air pollutants, can cause poisonous damage to animals and plants, and are also one of the main causes of acid rain, acid fog and photochemical smog. Gas turbine is an important power equipment. On the one hand, it is necessary to continuously increase the outlet temperature of the combustion chamber to improve the efficiency of the gas turbine. On the other hand, it is necessary to reduce the emission of nitrogen oxides in a wider range of working conditions. [0003] Most of the existing mainstream natural gas heavy-duty gas turbines use lean premixed combustion technology. Lean premixed combustion chambers are prone to combustion instability under low working conditions,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/38F23R3/28
CPCF23R3/283F23R3/286F23R3/38
Inventor 熊燕郑祥龙刘耘州张哲巅肖云汉
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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