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Metering of diluent flow in combustor

A technology of burners and diluents, applied in the direction of burners, gas fuel burners, combustion chambers, etc., can solve problems such as bursting and burner operability problems

Inactive Publication Date: 2010-06-09
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excess diluent flows along the fuel nozzle and causes operability problems in the combustor, such as blowout

Method used

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  • Metering of diluent flow in combustor
  • Metering of diluent flow in combustor
  • Metering of diluent flow in combustor

Examples

Experimental program
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Effect test

Embodiment Construction

[0018] figure 1 Shown in is the burner 10 . The combustor 10 includes a baffle 12 having six baffle holes 14 through which six fuel nozzles 16 extend, eg, one fuel nozzle 16 extends through one baffle hole 14 . Although figure 1 Six fuel nozzles 16 are shown in , but it should be appreciated that other numbers of fuel nozzles 16 may be utilized. For example, the combustor 10 may include one fuel nozzle 16 or four fuel nozzles 16 . Such as figure 2 As shown in , the baffle 12 and cover ring 18 define a plenum 20 through which diluent flow 22 passes through an array of holes 24 in the cover ring 18 (eg Figure 4 (best shown in ) is directed into the gas chamber 20. In certain embodiments, diluent stream 22 may include steam or other diluents such as nitrogen.

[0019] At each fuel nozzle 16, such as figure 2 As shown in , a collar 26 is disposed at the baffle bore 14 between the baffle 12 and the fuel nozzle 16 . exist figure 2 In the preferred embodiment, the collar...

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Abstract

Disclosed is a combustor (10) including a baffle plate (12) having at least one through baffle hole (14) and at least one fuel nozzle (16) extending through the at least one baffle hole (14). A circumferentially adjustable collar (26) is located at the at least one baffle hole (14) between the baffle plate (12) and the at least one fuel nozzle (16). A plurality of openings (46) at the collar (26) are configured to meter a flow of diluent (22) between the baffle hole (14) and the at least one fuel nozzle (16). Further disclosed is a method for providing diluent (22) to a combustor (10) including providing a plurality of openings (46) disposed at a circumferentially adjustable collar (26) between a baffle plate (12) and at least one fuel nozzle (16) extending through a through hole in the baffle plate (12). The diluent (22) is flowed through the plurality of openings (46) toward at least one flow channel (56) in the at least one fuel nozzle (16).

Description

technical field [0001] The present invention generally relates to burners. More specifically, the invention relates to measuring diluent flow at fuel nozzles of combustors. Background technique [0002] A combustor typically includes one or more fuel nozzles that introduce fuel or a mixture of fuel and air into the combustor where it is ignited. In some combustors, the fuel nozzles extend through holes provided in the combustor's baffle. In these burners, it is often preferred to introduce a volume of diluent, usually nitrogen or steam, into the burner to reduce NO X exhaust and / or increase the output of the burner. Diluent is forced from the chamber through the gap between the baffle and each fuel nozzle. The diluent then flows along the perimeter of the fuel nozzle, with a portion of the diluent entering the fuel nozzle through holes located in the fuel nozzle's air collar. However, the gap between the baffle and the fuel nozzle varies due to the accumulation of assem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/00F23D14/48F23D11/00F23D11/38
CPCF23R3/286F23R3/10F23R3/04F23R3/002F23R3/283
Inventor J·E·巴顿J·D·贝里M·A·哈利J·D·范西罗
Owner GENERAL ELECTRIC CO