Method of reducing NOx emissions in a gas turbine engine

Patent · Tue Jul 20 00:00:00 EDT 1993

OSTI ID:6344471

Sciocchetti, M B

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): US 5228283; A
• Application Number: PPN: US 7-517349
• OSTI ID: 6344471
• Resource Relation: Patent File Date: 1 May 1990
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
54 ENVIRONMENTAL SCIENCES
FUEL INJECTION SYSTEMS
DESIGN
GAS TURBINES
NITROGEN OXIDES
AIR POLLUTION CONTROL
AIR
ATOMIZATION
COMBUSTION CHAMBERS
CRACKS
FUEL-AIR RATIO
MITIGATION
MIXTURES
NOZZLES
STRESSES
WATER
CHALCOGENIDES
CONTROL
DISPERSIONS
EQUIPMENT
FLUIDS
FUEL SYSTEMS
GASES
HYDROGEN COMPOUNDS
MACHINERY
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
TURBINES
TURBOMACHINERY
421000* - Engineering- Combustion Systems
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)