Injector apparatus and reheat combustor

Patent metadata

Field	Value
Publication number	US-2016169519-A1
Application number	US-201414567768-A
Country	US
Kind code	A1
Filing date	Dec 11, 2014
Priority date	Dec 11, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

Aspects of the present disclosure provide an apparatus including: an injector in fluid communication with an aft section of a reheat combustor in a power generation system, the aft section being positioned downstream of a combustion reaction zone in the reheat combustor, and positioned upstream of a turbine stage of the power generation system, wherein the turbine stage includes a turbine nozzle and a turbine blade row; and a conduit in fluid communication with the injector, wherein the conduit delivers at least one of a fuel from a fuel supply line and a carrier gas to the injector.

First claim

1 . An apparatus comprising:
a reheat combustor in a power generation system; an injector embedded within a surface of the reheat combustor and in fluid communication with an aft section of the reheat combustor, the aft section being positioned downstream of a combustion reaction zone in the reheat combustor, and positioned upstream of a turbine nozzle of the power generation system; and a conduit in fluid communication with the injector, wherein the conduit delivers at least one of a fuel and a carrier gas to the injector.

2 . The apparatus of claim 1 , further comprising at least one valve positioned between a fuel supply line and the conduit for controlling an amount of the fuel delivered from the fuel supply line to the injector.

3 . The apparatus of claim 2 , wherein the fuel supply line is in fluid communication with a mixing duct of the reheat combustor, and the at least one valve diverts at most approximately thirty percent of the fuel from the fuel supply line to the injector.

4 . The apparatus of claim 2 , further comprising:
a controller operatively connected to the at least one valve; and a sensor in communication with the controller for determining one of an inlet temperature of the reheat combustor, an outlet temperature of the reheat combustor, and an emissions output of the reheat combustor; wherein the controller is configured to adjust a position of the at least one valve based on one of the inlet temperature of the reheat combustor, the outlet temperature of the reheat combustor, and the emissions output of the reheat combustor.

5 . The apparatus of claim 1 , wherein a separation distance between the injector and a throat section of the turbine nozzle allows the fuel to ignite and react within the reheat combustor before entering a throat section of the turbine nozzle.

6 . The apparatus of claim 1 , wherein the conduit delivers the fuel and the carrier gas to the injector.

7 . The apparatus of claim 6 , wherein a mass ratio of the carrier gas to the fuel in the injector is between approximately one-to-one and approximately five-to-one.

8 . An apparatus comprising:
a turbine nozzle positioned downstream of a reheat combustor; an injector located embedded within a surface of the turbine nozzle; and a conduit in fluid communication with the injector, wherein the conduit delivers at least one of a fuel and a carrier gas to the injector.

9 . The apparatus of claim 8 , further comprising at least one valve between a fuel supply line and the conduit for controlling an amount of the fuel provided from the fuel supply line to the injector.

10 . The apparatus of claim 9 , wherein the fuel supply line is in fluid communication with a mixing duct positioned upstream of the turbine nozzle, and the at least one valve diverts at most approximately thirty percent of the fuel from the fuel supply line to the injector.

11 . The apparatus of claim 9 , further comprising:
a controller operatively connected to the at least one valve; and a sensor in communication with the controller for determining one of an inlet temperature of the reheat combustor, the outlet temperature of the reheat combustor, and an emissions output of the reheat combustor; wherein the controller is configured to adjust a position of the at least one valve based on one of the inlet temperature of the reheat combustor, an outlet temperature of the reheat combustor, and the emissions output of the reheat combustor.

12 . The apparatus of claim 8 , wherein a separation distance between the injector embedded within the surface of the turbine nozzle and a throat section of the turbine nozzle causes the fuel to ignites and reacts before entering the throat section of the turbine nozzle.

13 . The apparatus of claim 8 , wherein the conduit delivers the fuel and the carrier gas to the injector.

14 . The apparatus of claim 8 , wherein the injector is oriented on the surface of the turbine nozzle substantially in opposition to a direction of a fluid flow against the turbine nozzle.

15 . A reheat combustor comprising:
a reaction chamber positioned downstream of a mixing duct and upstream of a turbine nozzle of a power generation system, wherein the reaction chamber includes a fore section and an aft section, and wherein an air and a first portion of a fuel delivered from the mixing duct combust in the fore section of the reaction chamber; and an injector embedded within a surface of one of a wall of the reaction chamber and the turbine nozzle, wherein the injector delivers at least one of a carrier gas and a second portion of the fuel to the aft section of the reaction chamber.

16 . The reheat combustor of claim 15 , further comprising:
a conduit in fluid communication with the injector and a fuel supply line, wherein the fuel supply line is further in fluid communication with the mixing duct; and at least one valve positioned between the fuel supply line and the conduit for controlling an amount of the second portion of the fuel provided from the fuel supply line to the injector.

17 . The reheat combustor of claim 16 , wherein the at least one valve diverts at most approximately thirty percent of the fuel from the fuel supply line to the injector as the second portion of the fuel.

18 . The reheat combustor of claim 16 , further comprising:
a controller operatively connected to the at least one valve; and a sensor in communication with the controller for determining one of an inlet temperature of the reaction chamber, an outlet temperature of the reaction chamber, and an emissions output of the reaction chamber; wherein the controller is configured to adjust a position of the at least one valve based on one of the inlet temperature of the reaction chamber, the outlet temperature of the reaction chamber, and the emissions output of the reaction chamber.

19 . The reheat combustor of claim 15 , wherein a separation distance between the injector embedded within the turbine nozzle and a throat section of the turbine nozzle allows the fuel to ignites and reacts before entering the throat section of the turbine nozzle.

20 . The reheat combustor of claim 15 , further comprising an air conduit in fluid communication with the injector and the reaction chamber, wherein the air conduit delivers a carrier gas to the injector, and the carrier gas comprises unreacted air from one of an external air supply and a combustor in fluid communication with the power generation system.

Assignees

• Gen Electric

Inventors

• Davis Jr Lewis Berkley
• Foster Gregory Thomas
• Graham Kaitlin Marie
• Venkataraman Krishnakumar
• Widener Stanley Kevin

Classifications

• F23N2223/08

  Microprocessor; Microcomputer · CPC title

• F23N2241/20

  Gas turbines · CPC title

• F23N2223/04

  Memory · CPC title

• F23N1/00

  Regulating fuel supply · CPC title

• F23N5/003

  using detectors sensitive to combustion gas properties (F23N5/02, F23N5/18 - F23N5/26 take precedence) · CPC title