Gas turbine engine systems and methods for imparting corrosion resistance to gas turbine engines

Patent metadata

Field	Value
Publication number	US-9759131-B2
Application number	US-201314098924-A
Country	US
Kind code	B2
Filing date	Dec 6, 2013
Priority date	Dec 6, 2013
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

Methods and systems for imparting corrosion resistance to gas turbine engines are disclosed. Existing and/or supplemental piping is connected to existing compressor section air extraction piping and turbine section cooling air piping to supply water and anti-corrosion agents into areas of the gas turbine engine not ordinarily and/or directly accessible by injection of cleaning agents into the bellmouth of the turbine alone and/or repair methods. An anti-corrosion mixture is selectively supplied as an aqueous solution to the compressor and/or the turbine sections of the gas turbine engine to coat the gas turbine engine components therein with a metal passivation coating which mitigates corrosion in the gas turbine engine.

First claim

The invention claimed is:

1. A gas turbine engine system comprising:
a gas turbine engine, the gas turbine engine having a compressor section, a combustion system, a turbine section, compressor section air extraction piping and turbine section cooling air piping;
water supply piping, the water supply piping being in fluid communication with a supply of water;
a supply of an anti-corrosion agent comprising a polyamine corrosion inhibitor;
anti-corrosion agent supply piping, the anti-corrosion agent supply piping being in fluid communication with the supply of an anti-corrosion agent comprising the polyamine corrosion inhibitor;
a mixing chamber, the mixing chamber being in fluid communication with the water supply piping and the anti-corrosion agent supply piping, the mixing chamber being configured to receive water from the water supply piping and the anti-corrosion agent from the anti-corrosion agent supply piping to produce an anti-corrosion mixture, the anti-corrosion mixture being a mixture of the anti-corrosion agent and water; and
anti-corrosion mixture supply piping, the anti-corrosion mixture supply piping being in fluid communication with the mixing chamber and the compressor section air extraction piping and the turbine section cooling air piping to selectively supply the anti-corrosion mixture to the compressor section and/or the turbine section of the gas turbine engine, wherein the anti-corrosion mixture is introduced into the compressor section or turbine section of the gas turbine engine as an aqueous solution.

2. The gas turbine engine system of claim 1 , further comprising:
at least one pump, the at least one pump being in fluid communication with the water supply piping, the anti-corrosion agent supply piping and/or the anti-corrosion mixture supply piping; and
a control system, the control system being in operative communication with the at least one pump and the water supply piping, the anti-corrosion agent supply piping and/or the anti-corrosion mixture supply piping,
wherein the control system is configured to regulate a flow of the water, the anti-corrosion agent and/or the anti-corrosion mixture through the water supply piping, the anti-corrosion agent supply piping and/or the anti-corrosion mixture supply piping.

3. The gas turbine engine system of claim 2 , wherein the control system further comprises:
a control processor;
a control display associated with the control processor; and
at least one pressure sensor disposed in the water supply piping, the anti-corrosion agent supply piping and/or the anti-corrosion mixture supply piping, the at least one pressure sensor in data communication with the control processor, for sensing a pressure of the water, the anti-corrosion agent and/or the anti-corrosion mixture in the water supply piping, the anti-corrosion agent supply piping and/or the anti-corrosion mixture supply piping.

4. The gas turbine engine system of claim 3 , wherein the control system further comprises:
at least one flow control valve, positioned in the water supply piping, the anti-corrosion agent supply piping and/or the anti-corrosion mixture supply piping, the at least one flow control valve in communication with the control processor, for enabling actuation of the at least one flow control valve between at least open and closed positions, said actuation caused by the control processor; and
at least one flow sensor, disposed in the water supply piping, the anti-corrosion agent supply piping and/or the anti-corrosion mixture supply piping, the at least one flow sensor in communication with the control processor, for sensing the flow of water, the anti-corrosion agent and/or the anti-corrosion mixture in the water supply piping, the anti-corrosion agent supply piping and/or the anti-corrosion mixture supply piping.

5. The gas turbine engine system of claim 1 , wherein the anti-corrosion mixture is simultaneously supplied to the compressor section and the turbine section of the gas turbine engine.

6. The gas turbine engine system of claim 1 , wherein the anti-corrosion mixture supply piping further comprises:
an anti-corrosion mixture supply manifold, connected in fluid communication with the mixing chamber;
compressor section branch piping, connected in fluid communication with the anti-corrosion mixture supply manifold to supply the anti-corrosion mixture from the anti-corrosion mixture supply manifold to the compressor section of the gas turbine engine via the compressor section air extraction piping; and
turbine section branch piping connected in fluid communication with the anti-corrosion mixture supply manifold to supply the anti-corrosion mixture from the anti-corrosion mixture supply manifold to the turbine section of the gas turbine engine via the turbine section cooling air piping.

7. The gas turbine engine system of claim 6 , wherein the anti-corrosion mixture supply piping further comprises:
turbine bellmouth supply piping connected in fluid communication with the anti-corrosion mixture supply manifold to supply the anti-corrosion mixture from the anti-corrosion mixture supply manifold to a bellmouth of the gas turbine engine.

8. The gas turbine engine system of claim 6 , wherein the compressor section branch piping is in fluid communication with the anti-corrosion mixture supply manifold to supply the anti-corrosion mixture from the anti-corrosion mixture supply manifold to an aft region of the compressor section of the gas turbine engine via the compressor section air extraction piping, the aft region of the compressor section of the gas turbine engine being a 9th stage and/or a 13th stage of the compressor section of the gas turbine engine.

9. The gas turbine engine system of claim 6 , wherein the turbine section branch piping is in fluid communication with the anti-corrosion mixture supply manifold to supply the anti-corrosion mixture from the anti-corrosion mixture supply manifold to a 2nd stage and/or a 3rd stage of the turbine section of the gas turbine engine.

10. The gas turbine engine system of claim 1 , wherein the anti-corrosion agent supply is an external tank connected to and in fluid communication with the anti-corrosion agent supply piping via one or more quick disconnects.

11. The gas turbine engine system of claim 1 , further comprising:
cleaning agent supply piping, the cleaning agent supply piping being in fluid communication with a supply of a cleaning agent and the mixing chamber, the mixing chamber being configured to receive water from the water supply piping and the cleaning agent from the cleaning agent supply piping to produce a cleaning mixture; and
cleaning mixture supply piping, the cleaning mixture supply piping being in fluid communication with the mixing chamber and the compressor section air extraction piping and the turbine section cooling air piping to selectively supply the cleaning mixture to the compressor section and/or the turbine section of the gas turbine engine.

12. The gas turbine engine system of claim 11 , wherein the cleaning mixture is supplied to the compressor section and/or the turbine section of the gas turbine engine prior to the anti-corrosion mixture being supplied to the compressor section and/or the turbine section of the gas turbine engine.

13. The gas turbine engine system of claim 1 , wherein the anti-corrosion mixture is a first anti-corrosion mixture selectively supplied to the compressor section and having an anti-corrosion agent to water ratio which is different than an anti-corrosion agent to water ratio of a second anti-corrosion mixture selectively supplied to the turbine section of the gas turbine engine.

Assignees

• Gen Electric

Inventors

• Scipio Alston Ilford
• Davis Dale Joel
• Ekanayake Sanji
• Fernandez Paul Robert

Classifications

• F05D2210/20

  Properties · CPC title

• F01D25/007

  Preventing corrosion · CPC title

• F02C7/30 Primary

  Preventing corrosion {or unwanted deposits} in gas-swept spaces · CPC title

• F05D2260/95

  Preventing corrosion · CPC title

• F01D5/288

  Protective coatings for blades · CPC title