Patent ID: 6485289
Filing Date: 2002-11-26
Classification: F23C,F23D,F23J,F23L,Y02E

Abstract:
A combustion and emissions control system of apparatus comprising a first reaction chamber, means for injecting into the first reaction chamber fuel and air in amounts which produce a first mixture having a total fuel to air equivalence ratio which is sufficiently greater than one to cause combustion and nitrogenous species decay reactions over a residence time and temperature which are sufficient to produce first combustion products comprising partially oxidized fuel, decayed levels of nitrogenous species, nitrogenous NOx reducing species and nitrogen oxides, a second reaction chamber, means for injecting into the second reaction chamber additional fuel and air in amounts which produce a second mixture having a total fuel to air equivalence ratio which is sufficiently less than one to cause combustion in the mixture over a residence time and low temperature which are sufficient to produce second combustion products mixed with a minimum amount of nitrogen oxides, means for combining the first and second combustion products into a third mixture, and means for generating burnout reactions in the third mixture over a residence time, temperature and oxygen concentrations which are sufficient to complete reaction of any remaining fuel and to promote reaction between nitrogenous reducing species and nitrogen oxides to produce an exhaust with a low amount of nitrogen oxides.