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Apparatus and method for a combustor

A technology of burners and combustion chambers, applied in the direction of combustion methods, combustion equipment, burners, etc.

Inactive Publication Date: 2011-11-09
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Incomplete combustion of fuel produces increased CO emissions that can exceed emission limits
Therefore, minimum operating levels may need to be as high as 40-50% of design base load in existing de-rated operating modes to comply with CO and NOx emission limits

Method used

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  • Apparatus and method for a combustor
  • Apparatus and method for a combustor
  • Apparatus and method for a combustor

Examples

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Embodiment Construction

[0041] Reference will now be made in detail to embodiments of the invention, one or more examples of which are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. The same or similar symbols are used in the drawings and descriptions to refer to the same or similar components of the present invention.

[0042] Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.

[0043] f...

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PUM

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Abstract

The invention relates to an apparatus and a method for a combustor. The combustor (14) includes an end cover (22), a combustion chamber (28) downstream of the end cover (22), and nozzles (24) disposed radially in the end cover (22). A fixed shroud (36) surrounds at least one of the nozzles (24) and extends downstream into the combustion chamber (28). The shroud includes an inner wall surface (38) and an outer wall surface (40). A method for operating a combustor (14) includes flowing compressed working fluid through nozzles (32, 34) into a combustion chamber (28), flowing fuel through each nozzle (32) in a first subset of the nozzles (32, 34) into the combustion chamber (28), and igniting the fuel from each nozzle (32) in the first subset of nozzles (32, 34) in the combustion chamber (28). In addition, the method includes extending into the combustion chamber (28) a separate fixed shroud (36) around each nozzle (34) in a second subset of the nozzles (32, 34) and isolating fuel to each nozzle (34) in the second subset of nozzles (32, 34).

Description

technical field [0001] The present invention generally relates to combustors for gas turbines. Specifically, the present invention describes and enables the implementation of a combustor with multiple fuel nozzles that can be operated in various turndown regimes to reduce fuel consumption. Background technique [0002] Gas turbines are widely used in commercial operations for power generation. The gas turbine compresses ambient air, mixes fuel with the compressed air, and ignites the mixture to produce high-energy combustion gases that pass through the turbine to perform work. The turbine may drive an output shaft connected to a generator to generate electrical current, which is then supplied to the grid. Turbines and generators must operate at a relatively constant speed, regardless of power generation, to produce electrical current at the desired frequency. [0003] Gas turbines are typically designed to operate most efficiently at or near a designed base load. Often, ...

Claims

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Application Information

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IPC IPC(8): F23D11/36F23D14/76
CPCF23R3/34
Inventor A·瓦利夫S·蔡尔德斯S·梅什科夫
Owner GENERAL ELECTRIC CO