Injector apparatus with reheat combustor and turbomachine

Patent metadata

Field	Value
Publication number	US-10094571-B2
Application number	US-201414567791-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

Embodiments of the present disclosure provide an apparatus including: a first injector located on a surface of a turbine nozzle of a turbine stage positioned downstream of a reheat combustor, wherein the turbine stage includes the turbine nozzle and a turbine blade row; a second injector located on a wall of the reheat combustor; and at least one conduit in fluid communication with each of the first injector and the second injector, wherein the at least one conduit delivers at least one of a fuel from a fuel supply line and a carrier gas to an aft section of the reheat combustor through at least one of the first injector and the second injector, and wherein the aft section is positioned downstream of a combustion reaction zone in the reheat combustor.

First claim

What is claimed is:

1. An apparatus comprising:
a reheat combustor including a fore section and an aft section, the aft section being positioned downstream of a combustion reaction zone in the reheat combustor;
a turbine nozzle of a turbine stage positioned downstream of the reheat combustor, wherein the turbine nozzle defines a throat separating the aft section of the reheat combustor from the turbine stage of a power generation system;
a first injector embedded within a surface of the turbine nozzle, oriented substantially in opposition to a direction of a fluid flow from the reheat combustor, wherein the first injector is in fluid communication with a single reaction zone within the reheat combustor;
at least one first conduit in fluid communication between a fuel supply line and the first injector, and including a first valve;
a second injector embedded within a wall of the reheat combustor, upstream of the first injector, and in fluid communication with the at least one first conduit;
a controller operatively connected to the first valve of the at least one conduit;
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 first valve to adjust an amount of fuel in the at least one first conduit delivered to the first or second injector, 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 of the reheat combustor, and the at least one first valve is configured to divert at most approximately thirty percent of the fuel from the fuel supply line to the first or second injector.

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

4. The apparatus of claim 1 , wherein a mass ratio of a carrier gas to the fuel in one of the first injector and the second injector is between approximately one-to-one and approximately five-to-one.

5. A reheat combustor comprising:
a reaction chamber positioned between a mixing duct and a turbine nozzle of a turbine stage positioned downstream of the reaction chamber, wherein the reaction chamber includes a fore section and an aft section, 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 wherein the turbine nozzle defines a throat separating the aft section of the reaction chamber from the turbine stage of a power generation system;
a first injector embedded within a surface of the turbine nozzle, oriented substantially in opposition to a direction of a fluid flow from the reaction chamber, wherein the first injector is in fluid communication with a single reaction zone within the reheat combustor, and wherein the first injector delivers a first portion of a carrier gas and a second portion of the fuel to the aft section of the reaction chamber;
a second injector extending through a wall of the reaction chamber, and positioned upstream from the first injector, wherein the second injector delivers a second portion of the carrier gas and a third portion of the fuel to the aft section of the reaction chamber;
at least one first conduit in fluid communication between a fuel supply line and the first and second injectors, wherein the at least one first conduit includes a first valve;
a controller operatively connected to the first valve of the at least one first conduit;
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 first valve to adjust an amount of the second and third portions of the fuel, 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 , further comprising a splitting valve between the at least one conduit and the first and second injectors for controlling amounts of the second and the third portions of the fuel delivered to the first injector and the second injector.

7. The reheat combustor of claim 5 , wherein a separation distance between the turbine nozzle and one of the first and second injectors allows the fuel to ignite and fully react within the aft section of the reaction chamber before entering a throat section of the turbine nozzle.

8. The reheat combustor of claim 5 , wherein the carrier gas comprises unreacted air from one of an external air supply and a compressor in fluid communication with the reaction chamber.

9. The reheat combustor of claim 5 , wherein a mass ratio of the carrier gas to the fuel in one of the first injector and the second injector is between approximately one-to-one and approximately five-to-one.

10. An apparatus comprising:
a turbine nozzle positioned downstream of a reheat combustor of a power generation system, wherein the turbine nozzle defines a throat separating the reheat combustor from a turbine stage of the power generation system;
a reaction chamber of the reheat combustor positioned upstream of the turbine nozzle, wherein the reaction chamber includes a fore section and an aft section, and wherein an air and a first portion of a fuel combust in the fore section of the reaction chamber;
a fuel supply line in fluid communication with a first injector for injecting a second portion of the fuel and a carrier gas from a surface of the turbine nozzle into the aft section of the reaction chamber, wherein the first injector is oriented substantially in opposition to a direction of a fluid flow from the reheat combustor, positioned downstream from a second fuel injector in fluid communication with the reheat combustor, and wherein the fuel supply line is in fluid communication with a single reaction zone within the reheat combustor, through the injector;
at least one fuel valve positioned within the fuel supply line;
a controller operatively connected to the at least one fuel valve;
a temperature sensor in communication with the controller measuring an inlet temperature of the reaction chamber; an emissions sensor in communication with the controller for measuring an emissions output of the reaction chamber, wherein the controller adjusts a position of the at least one fuel valve to adjust an amount of the second portion of the fuel in response to the inlet temperature exceeding a temperature tolerance, or the emissions output of the reaction chamber exceeding an emissions tolerance.

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

• F23N5/003

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

• F02C9/28

  Regulating systems responsive to plant or ambient parameters, e.g. temperature, pressure, rotor speed (F02C9/30 - F02C9/38, F02C9/44 take precedence) · CPC title