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Method and apparatus for injecting steam in a gas turbine

A gas turbine and steam technology, applied in the direction of gas turbine devices, mechanical equipment, machines/engines, etc., can solve the problems of reducing flame stability, lack of power increase of steam injection technology, etc.

Active Publication Date: 2016-04-13
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The power gain of steam injection technology is reduced by reduced flame stability and increased unwanted emissions, lack of steam flow guidance and contingencies generated, and uneven mixing of injected steam with compressor exhaust gas inside the turbine casing or cladding advantage

Method used

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  • Method and apparatus for injecting steam in a gas turbine
  • Method and apparatus for injecting steam in a gas turbine
  • Method and apparatus for injecting steam in a gas turbine

Examples

Experimental program
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Embodiment Construction

[0014] First refer to figure 1 , shows a gas turbine combustor, generally designated 10, comprising an outer cladding or shell 12, a flow sleeve 14, and a combustor liner 16 disposed substantially centrally within the flow sleeve 14 and defining a combustion chamber 18 . A transition piece or duct 20 is coupled to the aft or downstream end of combustor liner 16 and supplies hot combustion gases to a first turbine section or stage represented by first stator vanes or nozzles 22 . At the forward end of the combustor 10 , an end cover 24 supports a plurality of fuel nozzles 26 that project into the combustion chamber 18 . End cover 24 includes the head or forward end of the combustor and supplies purge air and fuel to fuel nozzles 26 while supplying compressor exhaust air into the forward end of liner 16 to communicate with the Fuel mix supplied. As is well known, in certain gas turbine engines a plurality of combustors 10 are arranged in an annular array about the turbine rot...

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PUM

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Abstract

A gas turbine includes a plurality of combustors within an outer turbine shell, arranged about a rotor of the gas turbine, each combustor having a combustion chamber defined by a liner with an end cover at a forward end supporting at least on fuel nozzle. A transition piece is connected to an aft end of the liner for supplying hot combustion gases to a first stage of the gas turbine. At least one steam injection rake projects radially into said outer turbine shell and is provided with one or more steam injection nozzles for emitting steam to be mixed with compressor discharge air flowing about the transition pieces within the outer shell.

Description

technical field [0001] The present invention relates generally to gas turbine combustion technology, and more particularly, to the injection of steam into gas turbine combustors for reducing combustion temperatures and increasing generated power output. Background technique [0002] Steam injection is a technique used in gas turbine combustion systems to increase the power output of the turbine. More specifically, the combustion process in gas turbines typically results in the formation of nitrogen oxides (NOx), which are considered atmospheric pollutants. In the past, steam or water was injected into the combustor in order to reduce the flame temperature and thus the rate of NOx formation. In current steam injection arrangements for can-annular combustors, the steam is upstream of the annular array of combustor liners, and in the general area of ​​the transition piece (which directs the hot combustion gases to the first turbine stage), The direct injection passes through ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D9/02F02C3/30F01D25/14
CPCF01D9/023F01D25/14F02C3/30F05D2270/082
Inventor S.M.凯鲁林J.哈珀J.C.巴茨D.A.利森科
Owner GENERAL ELECTRIC CO