Injector apparatus and reheat combustor

Patent metadata

Field	Value
Publication number	US-10094570-B2
Application number	US-201414567768-A
Country	US
Kind code	B2
Filing date	Dec 11, 2014
Priority date	Dec 11, 2014
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

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

What is claimed is:

1. An apparatus comprising:
a turbine nozzle positioned downstream of a reheat combustor, wherein the turbine nozzle defines a throat separating an aft portion of the reheat combustor from a subsequent turbine stage of a power generation system;
at least one nozzle injector embedded within a surface of the turbine nozzle and oriented substantially in opposition to a direction of a fluid flow from the reheat combustor, and positioned downstream from another fuel injector in fluid communication with the reheat combustor, wherein the at least one nozzle injector is in fluid communication with a single reaction zone within the reheat combustor;
a conduit in fluid communication with the at least one nozzle injector, wherein the conduit delivers at least one of a fuel and a carrier gas to the at least one nozzle injector;
a valve between a fuel supply line to the reheat combustor and the conduit for controlling an amount of the fuel provided from the fuel supply line to the at least one nozzle injector;
a controller operatively connected to the valve;
a temperature sensor in communication with the controller for measuring an inlet temperature of the reheat combustor; and
an emissions sensor in communication with the controller for measuring an emissions output of the reheat combustor,
wherein the controller adjusts a position of the valve to increase an amount of fuel in the conduit in response to the inlet temperature exceeding a temperature tolerance, or the emissions output of the reheat combustor exceeding an emissions tolerance.

2. The apparatus of claim 1 , wherein the fuel supply line is in fluid communication with a mixing duct positioned upstream of the turbine nozzle, and the valve diverts at most approximately thirty percent of the fuel from the fuel supply line to the at least one nozzle injector.

3. The apparatus of claim 1 , wherein a separation distance between the at least one nozzle injector and the throat causes the fuel to ignite before entering the subsequent turbine stage.

4. The apparatus of claim 1 , wherein the conduit delivers the fuel and the carrier gas to the at least one nozzle injector.

5. A reheat combustor comprising:
a reaction chamber positioned downstream of a mixing duct and upstream of a turbine nozzle to a subsequent turbine stage 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;
at least one nozzle injector positioned on the turbine nozzle to the subsequent turbine stage and oriented substantially in opposition to a direction of a fluid flow from the reaction chamber, and positioned downstream from another fuel injector in fluid communication with the reaction chamber, wherein the at least one nozzle injector delivers a carrier gas and a second portion of the fuel to the aft section of the reaction chamber and wherein the turbine nozzle to the subsequent turbine stage defines a throat separating the aft section of the reaction chamber from the subsequent turbine stage of the power generation system, and wherein the at least one nozzle injector is in fluid communication with a single reaction zone within the reaction chamber; and
a conduit in fluid communication with the at least one nozzle injector and a fuel supply line, wherein the fuel supply line is in fluid communication with the mixing duct, and wherein the conduit delivers the carrier gas and the second portion of the fuel to the at least one nozzle injector;
a valve 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 at least one nozzle injector;
a controller operatively connected to the valve;
a temperature sensor in communication with the controller for measuring an inlet temperature of the reheat combustor; and an emissions sensor in communication with the controller for measuring an emissions output of the reheat combustor, wherein the controller adjusts a position of the valve to increase an amount of fuel in the conduit in response to the inlet temperature exceeding a temperature tolerance, or the emissions output of the reheat combustor exceeding an emissions tolerance.

6. The reheat combustor of claim 5 , wherein the valve diverts at most approximately thirty percent of the fuel from the fuel supply line to the at least one nozzle injector as the second portion of the fuel.

7. The reheat combustor of claim 5 , wherein a separation distance between the at least one nozzle injector and the throat allows the fuel to ignite and react before entering the subsequent turbine stage.

8. The reheat combustor of claim 5 , further comprising an air conduit in fluid communication with the at least one nozzle injector and the reaction chamber, wherein the air conduit delivers a carrier gas to the at least one nozzle 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

• F23N2241/20

  Gas turbines · CPC title

• F23N2223/04

  Memory · CPC title

• F23N2223/08

  Microprocessor; Microcomputer · CPC title

• F23R3/34 Primary

  Feeding into different combustion zones · CPC title

• F23R2900/03341

  Sequential combustion chambers or burners · CPC title