Systems and methods for addition of fuel additives to control turbine corrosion

Patent metadata

Field	Value
Publication number	US-11814972-B2
Application number	US-202117338010-A
Country	US
Kind code	B2
Filing date	Jun 3, 2021
Priority date	Jun 3, 2021
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

A system comprises a gas turbine engine including a compressor, combustor, gas turbine, the combustor including a plurality of late lean fuel injectors; and wash system configured to be attached to and in fluid communication with the a plurality of late lean fuel injectors of the combustor. The wash system includes a water source supplying water; a first fluid source supplying a first fluid; a mixing chamber in communication with the water source and first fluid source; a water pump to pump water to the mixing chamber; a first fluid pump to pump the first fluid to the mixing chamber; a fluid line in fluid communication with the mixing chamber and at least one of the plurality of late lean fuel injectors so fluid from the mixing chamber is injected into the combustor at late lean fuel injectors. The wash system is operated with the gas turbine engine off-line.

First claim

What is claimed is:

1. A gas turbine engine system, comprising:
a gas turbine engine, the gas turbine engine including a compressor, a combustor, and a gas turbine, the combustor including a plurality of late lean fuel injectors supplied with a secondary fuel to an interior of the combustor, the plurality of late lean fuel injectors distal to a head end of the combustor, adjacent to an upstream side of the gas turbine, and configured to supply the secondary fuel in a direction substantially transverse to a longitudinal direction of the combustor; and
a wash system configured to be attached to and in fluid communication with the plurality of late lean fuel injectors of the combustor, the wash system including:
a water source supplying water;
a first fluid source supplying a first fluid;
a mixing chamber in communication with the water source and the first fluid source;
a water pump configured to pump the water to the mixing chamber;
a first fluid pump configured to pump the first fluid to the mixing chamber;
a fluid line configured to be in fluid communication with the mixing chamber and at least one of the plurality of late lean fuel injectors such that a fluid from the mixing chamber including the water, the first fluid, or a mixture thereof is injected into the combustor at at least one of the plurality of late lean fuel injectors,
wherein the wash system is operated with the gas turbine engine in an off-line mode.

2. The gas turbine engine system of claim 1 , wherein the first fluid source includes a detergent source, and wherein the first fluid includes a detergent.

3. The gas turbine engine system of claim 1 , wherein the first fluid source includes an anti-static solution source, and wherein the first fluid includes an anti-static solution.

4. The gas turbine engine system of claim 1 , wherein the first fluid source supplies a mixture of demineralized/deionized water and at least one of magnesium (Mg), yttrium (Y), or detergent.

5. The gas turbine engine system of claim 4 , wherein the mixture of demineralized/deionized water and magnesium (Mg) Mg), yttrium (Y), or detergent removes vanadium from internal components of the gas turbine engine.

6. The gas turbine engine system of claim 4 , wherein the mixture of demineralized/deionized water and magnesium (Mg), yttrium (Y), or detergent is provided as a solution or as a foam.

7. The gas turbine engine system of claim 1 , wherein the mixing chamber includes one or more angled counter flow nozzles therein, the one or more angled counter flow nozzles extending into the mixing chamber at an angle with respect to a central axis of the mixing chamber and configured to inject the first fluid at the angle in a direction counter to a flow of the water in the mixing chamber.

8. The gas turbine engine system of claim 1 , wherein the water source is in communication with the mixing chamber via a water source line and the water pump.

9. The gas turbine engine system of claim 1 , wherein the first fluid source is in communication with the mixing chamber via a first fluid source line and the first fluid pump.

10. The gas turbine engine system of claim 1 , further including a controller, the controller being in operative communication with the water pump and the first fluid pump, wherein the controller is configured to regulate flow of the water and the first fluid through the fluid line to at least one of the plurality of late lean fuel injectors.

11. The gas turbine engine system of claim 10 , wherein the controller further includes at least one flow control valve positioned in the fluid line, the at least one flow control valve is in communication with the controller for enabling actuation of the at least one flow control valve between at least open and closed positions, the actuation caused by the controller.

12. The gas turbine engine system of claim 10 , wherein the controller further includes at least one flow sensor positioned in the fluid line, the at least one flow sensor in communication with the controller for sensing flow in the fluid line.

13. A method of washing an off-line gas turbine engine, the gas turbine engine including a compressor, a combustor, a gas turbine, the combustor including a plurality of late lean fuel injectors distal to a head end of the combustor, adjacent to an upstream side of the gas turbine, and supplied with secondary fuel to an interior of the combustor, the plurality of late lean fuel injectors configured to supply the secondary fuel in a direction substantially transverse to a longitudinal direction of the combustor, the method including:
supplying water from a water source to a mixing chamber of a wash system;
supplying a first fluid from a first fluid source to the mixing chamber of the wash system;
supplying the water and first fluid to the mixing chamber including pumping water from the water source and pumping the first fluid from the first fluid source; and
injecting fluid from the mixing chamber to at least one of the plurality of late lean fuel injectors while the gas turbine engine is off-line.

14. The method of claim 13 , wherein the first fluid source includes a detergent source, and wherein the first fluid includes a detergent.

15. The method of claim 13 , wherein the first fluid source includes an anti-static solution source, and wherein the first fluid includes an anti-static solution.

16. The method of claim 13 , wherein the first fluid source includes a mixture of demineralized/deionized water and at least one of magnesium (Mg), yttrium (Y), or detergent.

17. The method of claim 16 , wherein the injecting causes removal of vanadium from internal components of the gas turbine engine by the mixture of demineralized/deionized water and magnesium (Mg), yttrium (Y), or detergent.

18. The method of claim 16 , wherein the mixture of demineralized/deionized water and magnesium (Mg), yttrium (Y), or detergent is a solution or a foam.

19. The method of claim 13 , wherein the mixing chamber includes one or more angled counter flow nozzles therein, the one or more angled counter flow nozzles extending into the mixing chamber at an angle with respect to a central axis of the mixing chamber to inject the first fluid at the angle in a direction counter to a flow of the water in the mixing chamber, further including mixing the water and the first fluid using the one or more angled counter flow nozzles.

20. The method of claim 13 , wherein the gas turbine engine further includes a controller, the controller in operative communication with the water pump, the first fluid pump, and the fluid line, and further including regulating a flow of the water and the first fluid through the fluid line to the plurality of late lean fuel injectors, using the controller.

Assignees

• Gen Electric

Inventors

• Scipio Alston Ilford
• Eggart Justin Todd
• Stevens Colin Noel
• Ekanayake Sanji

Classifications

• F01D25/002 Primary

  Cleaning of turbomachines · CPC title

• B08B3/02

  Cleaning by the force of jets or sprays · CPC title

• B08B3/08

  the liquid having chemical or dissolving effect · CPC title

• B08B9/0325

  Control mechanisms therefor · CPC title

• C11D3/046

  Salts · CPC title