Fuel nozzle of gas turbine

Abstract

The invention provides a fuel nozzle of a gas turbine. The fuel nozzle comprises a cylindrical center body, an outer wall surface, an annular gas channel, a swirl vane, a support sleeve, a mounting flange, a rear cover plate, a main fuel pipe and an on-duty fuel pipe, wherein the annular gas channel is arranged between the outer wall surface and the center body; the swirl vane is arranged in the annular gas channel; a fuel channel and a first fuel tank communicated with the surface of the swirl vane are arranged in the wall of the support sleeve; a second fuel tank is arranged in the mountingflange; the rear cover plate is provided with a first fuel pipe interface and a second fuel pipe interface; the main fuel pipe is connected with the first fuel pipe interface and the second fuel tank;and the on-duty fuel pipe is connected with the second fuel pipe interface and a flow guide pipe. According to the invention, the main fuel pipe and the on-duty fuel pipe are introduced, and when thedistance between the interface of the nozzle on a combustion chamber and a gas turbine shell is larger, fuel and air are well mixed, so that low-pollution energy-saving and environment-friendly combustion is realized, and the fuel nozzle can be applied to a ground gas turbine with strict pollutant emission limitation; and the nozzle also has the advantages of simple structure, convenience in disassembly and maintenance and low manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to a gas turbine fuel nozzle. Background technique [0002] A gas turbine is a heat engine that uses continuously flowing gas as a working medium to drive the impeller to rotate at high speed and convert the thermal energy of the fuel into mechanical work. A typical gas turbine includes three major components: a compressor, a combustor, and a turbine. Among them, the fuel nozzle is an important part of the combustion chamber of the gas turbine, and its function is to inject fuel into the combustion chamber to release energy, and then output power through the turbine. [0003] At present, with the gradual improvement of environmental protection standards, the industry's restrictions on pollutant emissions from gas turbines, especially ground gas turbines, are becoming more and more stringent. In order to reduce nitrogen oxides (NO x ) and other pollutants, dry low-pollution c...

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Problems solved by technology

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a gas turbine fuel nozzle, which is used to solve the problems of poor fuel mixing performance and inconvenient disassembly of fuel nozzles with large aspect ratios in the prior art

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