Nozzle head for gas turbine and nozzle for gas turbine

Abstract

The invention provides a nozzle head for a gas turbine and a nozzle for the gas turbine. The nozzle head for the gas turbine comprises a body. The body comprises an input section, a premixing section and an output section which are connected in the axial direction of the body, and the input section is provided with an air conveying channel and a fuel conveying channel. The premixing section is provided with a first fuel conveying cavity communicating with the fuel conveying channel and premixing channels communicating with the air conveying channel, the first fuel conveying cavity is adjacent to the side wall face of the premixing section and communicates with the premixing channels, and the output section is provided with ejection cavities communicating with the premixing channels and ejection holes communicating with the ejection cavities. The ejection cavities comprise a first ejection cavity sections which are staggered with the premixing channels. The nozzle head for the gas turbine has the advantages of being high in flame stabilizing capacity and capable of cooling the body.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to a nozzle head for a gas turbine and a nozzle for a gas turbine. Background technique [0002] In the development process of gas turbine dry low NOx (DLN) combustion system, pollutants, flame stability, dynamic pressure characteristics and cooling technology are several aspects that affect each other, although the stable flame is a better way to stabilize the flame , but too much introduction of purge air to cool the nozzle head of the combustion chamber will reduce the stability of the nozzle head (that is, the stability of the flame). However, if the amount of blowing air introduced is small, although it has little effect on the flame stabilization ability of the nozzle head, the cooling protection of the nozzle head is not enough, which may easily cause damage to the nozzle head. Contents of the invention [0003] The present invention aims to solve one of the technical...

AI Technical Summary

Problems solved by technology

[0002] During the development of gas turbine dry low NOx (DLN) combustion system, pollutants, flame stability, dynamic pressure characteristics and cooling technology are several aspects that influence each other , although stabilizing the flame is a better way to stabilize the flame, but too much introduction of blowing air to cool the nozzle head of the combustion chamber will reduce the stability of the nozzle head (that is, stabilizing the flame)

However, if the amount of cleaning blowing air introduced is small, although it has little effect on the flame stabilization ability of the nozzle head, the cooling protection of the nozzle head is not enough, and it is easy to cause damage to the nozzle head

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