Method of reducing NOx emissions in a gas turbine engine
Patent
·
OSTI ID:6344471
A method is described for reducing NO[sub x] emissions and for eliminating stress cracking in combustion components caused by combustion in a gas turbine comprising the steps of: (a) providing a fuel nozzle body having a nozzle arranged to provide a fuel passageway, a combustion passageway and a water passageway, the water passageway located substantially centrally along a longitudinal axis of the nozzle, the combustion air passageway lying radially outwardly of the water passageway, and the fuel passageway lying adjacent and radially outwardly of the combustion air passageway; (b) injecting fuel through said fuel passageway and into a combustion chamber of a gas turbine as a first conical spray; (c) injecting water through said water passageway in said nozzle assembly coincident with said longitudinal axis into said combustion chamber as a second, finely atomized conical spray located radially inwardly of said first conical spray so as to avoid direct water impingement on hot metal surfaces within said combustion chamber; and (d) injecting combustion air through said air passageway in said nozzle assembly into said combustion chambers as a third conical spray located radially between said first and said second conical sprays, wherein the fuel, water and combustion air are mixed upon discharge from said fuel nozzle body in said combustion chamber.
- Assignee:
- General Electric Co., Schenectady, NY (United States)
- Patent Number(s):
- A; US 5228283
- Application Number:
- PPN: US 7-517349
- OSTI ID:
- 6344471
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR
AIR POLLUTION CONTROL
ATOMIZATION
CHALCOGENIDES
COMBUSTION CHAMBERS
CONTROL
CRACKS
DESIGN
DISPERSIONS
EQUIPMENT
FLUIDS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
GAS TURBINES
GASES
HYDROGEN COMPOUNDS
MACHINERY
MITIGATION
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NOZZLES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
STRESSES
TURBINES
TURBOMACHINERY
WATER
421000* -- Engineering-- Combustion Systems
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR
AIR POLLUTION CONTROL
ATOMIZATION
CHALCOGENIDES
COMBUSTION CHAMBERS
CONTROL
CRACKS
DESIGN
DISPERSIONS
EQUIPMENT
FLUIDS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
GAS TURBINES
GASES
HYDROGEN COMPOUNDS
MACHINERY
MITIGATION
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NOZZLES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
STRESSES
TURBINES
TURBOMACHINERY
WATER