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A combined premixer for gas turbine

A gas turbine, combined technology, applied in the direction of combustion chamber, combustion method, combustion equipment, etc., can solve the problems of unstable combustion of full premixed combustion, unstable combustion of premixed nozzles, easy tempering, etc., and achieve the benefit of gas dispersion The effect of mixing, design difficulty and production difficulty is low, and stability is improved

Active Publication Date: 2021-09-07
成都中科翼能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of unstable combustion of pre-mixing nozzles in the prior art, this solution provides a combined pre-mixer for gas turbines, which is equipped with on-duty pre-mixing nozzles, which can be used during the start-up of the gas turbine according to the needs of the combustion stage. Supplementary gas is used to generate a stable diffusion combustion flame, which solves the problem of unstable combustion and easy tempering or quenching during the start-up phase of fully premixed combustion. The structure is simple and easy to maintain

Method used

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  • A combined premixer for gas turbine
  • A combined premixer for gas turbine
  • A combined premixer for gas turbine

Examples

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Embodiment 1

[0036] Such as Figure 1-4 As shown, this embodiment designs a combined premixer for gas turbines, the purpose of which is to avoid the problems of easy tempering and flameout in the starting state of the premixer by increasing diffusion combustion. The combined premixer in this embodiment includes components such as a premixing nozzle and a connecting body 3 .

[0037] The premix nozzle is connected to a connection body 3 for fixing the premix nozzle to the combustor head of the gas turbine.

[0038] The premixing nozzle includes an outer casing 13, swirl vanes 11 and a central cone 12; a premixing channel is arranged in the outer casing 13, and the central cone 12 is arranged at the center of the premixing channel; the premixing channel is used for gas Pre-mixing with air; a plurality of swirl blades 11 for air swirl are arranged between the central cone 12 and the outer shell 13, and an air inlet 133 is arranged on the air intake side of the pre-mixing channel, and the pre...

Embodiment 2

[0042] Such as Figure 1-4 As shown, this embodiment designs a combined premixer for gas turbines. The purpose is to use the combination of premixing nozzles to solve the problems of difficult installation and maintenance, production and design of existing premixers. The combined premixer in this embodiment can be combined on the structure in Example 1, and can also be a combination of a new structure.

[0043] The combined premixer in this embodiment includes components such as a premixing nozzle and a connecting body 3 .

[0044] A plurality of premixing nozzles are connected side by side on the connecting body 3, and the connecting body 3 is used to fix each premixing nozzle to the head of the combustion chamber of the gas turbine.

[0045] The premixing nozzle includes an outer casing 13, swirl vanes 11 and a central cone 12; a premixing passage is provided in the outer casing 13, and the central cone 12 is arranged at the center of the premixing passage; the premixing pa...

Embodiment 3

[0049] Such as Figure 1-4 As shown, this embodiment designs a combined premixer for gas turbines, the purpose of which is to use the way of spraying gas from the position of the swirl blade 11 of the gas small hole 43 to improve the mixing degree of the premixed gas. In this embodiment The combined type premixer in can be combined on the structure in embodiment 1 or 2, also can be to adopt new structure.

[0050] The combined premixer in this embodiment includes components such as a premixing nozzle and a connecting body 3 .

[0051] A plurality of premixing nozzles are connected side by side on the connecting body 3, and the connecting body 3 is used to fix each premixing nozzle to the head of the combustion chamber of the gas turbine.

[0052] The premixing nozzle includes an outer casing 13, swirl vanes 11 and a central cone 12; a premixing passage is provided in the outer casing 13, and the central cone 12 is arranged at the center of the premixing passage; the premixing...

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Abstract

The invention belongs to the technical field of gas turbines, and in particular relates to a combined premixer for gas turbines, which includes a premixing nozzle and a connecting body. The premixing nozzle includes an outer casing, a swirl vane and a central cone; A premixing channel is provided, and the central cone is arranged at the center of the premixing channel; the premixing channel is used for premixing gas and air; there are multiple swirl blades between the central cone and the outer casing; the premixing The nozzle is mounted on the connecting body and is used to fix the premix nozzle to the combustion chamber head of the gas turbine; on the central cone of the premix nozzle on duty there is a second gas passage which can feed into the combustion chamber For the gas used for diffusion combustion, the on-duty premix nozzle and the main combustion premix nozzle are installed in combination. When the gas turbine is started, the on-duty premix nozzle will supplement the gas according to the combustion stage, so as to improve the combustion stability in the start-up stage and reduce backfire or Quenching occurs.

Description

technical field [0001] The invention belongs to the technical field of gas turbines, and in particular relates to a combined premixer for gas turbines. Background technique [0002] Gas turbine is a device with good cleanliness and high efficiency. It has the advantages of small size and low weight. It is widely used in power generation, independent energy system, mechanical drive and other fields. [0003] However, during the operation of the gas turbine, nitrogen oxides (NO x ), carbon monoxide (CO) and unburned hydrocarbons (UHC) and other pollutants are mainly related to the temperature of the combustion flame in the combustion chamber, the equivalence ratio, the intake pressure and the uniformity of mixing of gas and air. [0004] In recent years, low-emission combustion technology has developed rapidly, and various new technologies have emerged continuously. A number of low-emission combustion technologies have been developed, and various low-pollution combustion cham...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23R3/28F23R3/38
CPCF23R3/286F23R3/38
Inventor 颜腾冲王龙范珍涔陈柳君代茂林杨治刘宝琪王梁丞赵汝伟
Owner 成都中科翼能科技有限公司