Central region combustor with staged combustion function

A technology of staged combustion and central zone, applied in the combustion chamber, combustion method, combustion equipment, etc., can solve the problem that the combustion chamber is difficult to meet the requirements of high outlet temperature, and achieve the improvement of premix uniformity, optimization of emission performance, and flame temperature distribution. uniform effect

Inactive Publication Date: 2015-12-23
AECC SHENYANG ENGINE RES INST
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a central zone burner with staged combustion to solve the problem that the current combustion chamber is difficult to meet the high outlet temperature requirement

Method used

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  • Central region combustor with staged combustion function
  • Central region combustor with staged combustion function
  • Central region combustor with staged combustion function

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Embodiment Construction

[0044] The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0045] reference figure 1 As shown, the existing central zone combustor 40 is roughly shown, which includes a central body assembly 41 and a nozzle assembly 42. The central body assembly 41 includes a central cylinder 43, a central outer wall 44 and a primary cyclone 45. The central cylinder 43 includes a central swirler 46, an inner cylinder front wall 47, and an inner cylinder rear wall 48, which are fixedly connected back and forth by welding to form a main fuel passage 56 for sufficient premixing of fuel and air. The primary cyclone 45 is welded to the outer side of the downstream end of the inner cylinder front wall 47 of the central cylinder 43 to cool the central body asse...

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Abstract

The invention relates to the field of low-emission combustion chambers, in particular to a central region combustor with the staged combustion function. The problem that the requirement for the high outlet temperature can hardly be met by a combustion chamber can be solved. The central region combustor comprises a central body assembly and a nozzle assembly. The central body assembly is provided with a central barrel, an outer central body wall and a first-stage cyclone. A main fuel channel is formed between a nozzle shell and the central barrel. An auxiliary fuel channel is formed between the outer central body wall and the central barrel. The nozzle assembly is provided with the nozzle shell and a fuel spray rod. The nozzle shell is provided with a fuel path. The fuel spray rod is provided with main fuel injection holes and auxiliary fuel injection holes. Auxiliary fuel through holes corresponding to the auxiliary fuel injection holes one to one are formed in the central barrel. By the adoption of the central region combustor, the emission performance of a combustion chamber at the high flame temperature can be optimized; and due to the additional arrangement of the auxiliary fuel channel, the impact effect of cooling air on a downstream central backflow region is eliminated, and instable combustion and reduction of combustion efficiency of a central region are prevented.

Description

Technical field [0001] The invention relates to the field of dry low-emission combustion chambers, in particular to a staged combustion central zone burner. Background technique [0002] As we all know, the inlet temperature of the turbine will affect the efficiency of the gas turbine engine. Therefore, as the power and efficiency requirements of the gas turbine engine continue to increase, the turbine inlet temperature requirements also gradually increase, resulting in an increase in the heat load of the turbine and an increase in NOx emissions from the combustion chamber. . [0003] In recent years, the country has paid more attention to the control of air pollution, and national laws and regulations have imposed stricter restrictions on NOx emissions from gas turbines. The key to controlling the NOx emissions of gas turbines is to control the flame temperature in the combustion zone. The dry low-emission combustion technology uses lean premixed combustion to reduce the flame te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/28
Inventor 王正阳陈明禄李洁周建华马宏宇
Owner AECC SHENYANG ENGINE RES INST
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