Systems and methods for mitigating the impact of vanadium in heavy fuel oil

Patent metadata

Field	Value
Publication number	US-2017191423-A1
Application number	US-201514985468-A
Country	US
Kind code	A1
Filing date	Dec 31, 2015
Priority date	Dec 31, 2015
Publication date	Jul 6, 2017
Grant date	—

Abstract

The present application provides a gas turbine engine for combusting a flow of hydrocarbon based liquid fuel with vanadium contaminants therein. The gas turbine engine may include a combustor for combusting the flow of hydrocarbon based liquid fuel, an upstream magnesium mixing system for mixing a flow of magnesium with the flow of hydrocarbon based liquid fuel, a turbine, an air extraction system in communication with the turbine, and a downstream magnesium mixing system for providing the flow of magnesium to the air extraction system.

First claim

We claim:

1 . A gas turbine engine for combusting a flow of hydrocarbon based liquid fuel with vanadium contaminants therein, comprising:
a combustor for combusting the flow of hydrocarbon based liquid fuel; an upstream magnesium mixing system for mixing a flow of magnesium with the flow of hydrocarbon based liquid fuel; a turbine; an air extraction system in communication with the turbine; and a downstream magnesium mixing system for providing the flow of magnesium to the air extraction system.

2 . The gas turbine engine of claim 1 , wherein the upstream magnesium mixing system comprises the flow of magnesium and a flow of carrier fluid.

3 . The gas turbine engine of claim 2 , wherein the upstream magnesium mixing system comprises an upstream magnesium mixing chamber.

4 . The gas turbine engine of claim 3 , wherein the upstream magnesium mixing chamber comprises an angled upstream counterflow nozzle to produce an upstream mixed magnesium flow.

5 . The gas turbine engine of claim 4 , wherein the upstream magnesium mixing system comprises a hydrocarbon based liquid fuel mixing chamber to mix the upstream mixed magnesium flow and the flow of hydrocarbon based liquid fuel.

6 . The gas turbine engine of claim 5 , wherein the hydrocarbon based liquid fuel mixing chamber comprises an angled main counterflow nozzle to produce a homogeneous flow.

7 . The gas turbine engine of claim 1 , wherein the downstream magnesium mixing system comprises the flow of magnesium and a flow of carrier fluid.

8 . The gas turbine engine of claim 7 , wherein the downstream magnesium mixing system comprises a downstream magnesium mixing chamber.

9 . The gas turbine engine of claim 8 , wherein the downstream magnesium mixing chamber comprises an angled downstream counterflow nozzle to produce a downstream mixed magnesium flow.

10 . The gas turbine engine of claim 1 , wherein the downstream magnesium mixing system comprises a vanadium sensor in communication with the flow of heavy fuel oil.

11 . The gas turbine engine of claim 1 , wherein the flow of magnesium comprises a water based magnesium sulphite emulsion.

12 . The gas turbine engine of claim 1 , wherein the air extraction system comprises compressor section air extraction piping and turbine section cooling air piping.

13 . The gas turbine engine of claim 12 , wherein the downstream magnesium mixing system is in communication with the turbine section cooling air piping.

14 . The gas turbine engine of claim 12 , wherein the turbine section cooling air piping comprises second stage turbine cooling air piping and third stage cooling air piping.

15 . A method of limiting the impact of vanadium in a flow of heavy fuel oil during combustion in a gas turbine engine, comprising:
determining a nature of the vanadium in the flow of heavy fuel oil; mixing a flow of magnesium and the flow of heavy fuel oil; combusting the mixed flow of magnesium and heavy fuel oil; and injecting a further flow of magnesium into a turbine of the gas turbine engine.

16 . A magnesium dispensing and mixing system for protecting a turbine when combusting a flow of heavy fuel oil with vanadium contaminants therein, comprising:
a vanadium sensor in communication with the flow of heavy fuel oil; a flow of magnesium; a flow of water; a magnesium mixing chamber; and an air extraction system in communication with the magnesium mixing chamber and the turbine.

17 . The magnesium mixing system of claim 16 , wherein the flow of magnesium comprises a water based magnesium sulphite emulsion.

18 . The magnesium mixing system of claim 16 , wherein the air extraction system comprises turbine section cooling air piping.

19 . The magnesium mixing system of claim 18 , wherein the turbine section piping comprises second stage turbine cooling air piping and third stage cooling air piping.

20 . The magnesium mixing system of claim 16 , further comprising a controller in communication with the vanadium sensor.

Assignees

• Gen Electric

Inventors

• Scipio Alston Ilford
• Trayhan David
• Ekanayake Sanji

Classifications

• F23K5/12

  Preparing emulsions (burners spraying an emulsion of water and fuel into the combustion space F23D11/16) · CPC title

• F23J15/003 Primary

  for supplying chemicals to fumes, e.g. using injection devices · CPC title

• F23K2300/103

  Mixing with other fluids · CPC title

• F02C3/30

  Adding water, steam or other fluids {for influencing combustion, e.g. to obtain cleaner exhaust gases (F02C7/141, F02C7/30, F01D21/00, F01K21/04, F23D11/10 take precedence)} · CPC title

• F23R2900/00004

  Preventing formation of deposits on surfaces of gas turbine components, e.g. coke deposits · CPC title