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Title: Gas turbine topping combustor

Abstract

A combustor is described for burning a mixture of fuel and air in a rich combustion zone, in which the fuel bound nitrogen in converted to molecular nitrogen. The fuel rich combustion is followed by lean combustion. The products of combustion from the lean combustion are rapidly quenched so as to convert the fuel bound nitrogen to molecular nitrogen without forming NOx. The combustor has an air radial swirler that directs the air radially inward while swirling it in the circumferential direction and a radial fuel swirler that directs the fuel radially outward while swirling it in the same circumferential direction, thereby promoting vigorous mixing of the fuel and air. The air inlet has a variable flow area that is responsive to variations in the heating value of the fuel, which may be a coal-derived fuel gas. A diverging passage in the combustor in front of a bluff body causes the fuel/air mixture to recirculate with the rich combustion zone. 14 figs.

Inventors:
; ;
Issue Date:
Research Org.:
Foster Wheeler Development Corp
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
489080
Patent Number(s):
5636510
Application Number:
PAN: 8-248,742
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (United States)
DOE Contract Number:  
AC21-86MC21023
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 10 Jun 1997
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; STAGED COMBUSTION; COMBUSTORS; DESIGN; FUEL-AIR RATIO; NITROGEN OXIDES; AIR POLLUTION ABATEMENT; GAS TURBINES; TOPPING CYCLES; VORTEX FLOW; FUEL GAS; COAL GASIFICATION

Citation Formats

Beer, J, Dowdy, T E, and Bachovchin, D M. Gas turbine topping combustor. United States: N. p., 1997. Web.
Beer, J, Dowdy, T E, & Bachovchin, D M. Gas turbine topping combustor. United States.
Beer, J, Dowdy, T E, and Bachovchin, D M. Tue . "Gas turbine topping combustor". United States.
@article{osti_489080,
title = {Gas turbine topping combustor},
author = {Beer, J and Dowdy, T E and Bachovchin, D M},
abstractNote = {A combustor is described for burning a mixture of fuel and air in a rich combustion zone, in which the fuel bound nitrogen in converted to molecular nitrogen. The fuel rich combustion is followed by lean combustion. The products of combustion from the lean combustion are rapidly quenched so as to convert the fuel bound nitrogen to molecular nitrogen without forming NOx. The combustor has an air radial swirler that directs the air radially inward while swirling it in the circumferential direction and a radial fuel swirler that directs the fuel radially outward while swirling it in the same circumferential direction, thereby promoting vigorous mixing of the fuel and air. The air inlet has a variable flow area that is responsive to variations in the heating value of the fuel, which may be a coal-derived fuel gas. A diverging passage in the combustor in front of a bluff body causes the fuel/air mixture to recirculate with the rich combustion zone. 14 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {6}
}