Patent ID: 6196831
Filing Date: 2001-03-06
Classification: F23C,F23D

Abstract:
A combustion process for burning a fuel, comprising the steps:simultaneously injecting at least one fuel jet and at least one main oxidizer jet into a main combustion zone, the point of injection of each at least one main oxidizer jet being a distance D from the point of injection of the fuel jet closest to the at least one main oxidizer jet, the distance D satisfying at least one of the following relations: ##EQU9##and ##EQU10##wherein D is the minimum distance between the outer edge of the at least one main oxidizer jet and the outer edge of said closest fuel jet at their respective points of injection, and A and B are the cross sectional area of the at least one main oxidizer jet and the cross sectional area of the at least one fuel jet, the cross sectional areas A and B being taken at each point of injection of the at least one main oxidizer jet and the at least one fuel jet, the injecting step being performed so as to keep the at least one fuel jet and the at least one main oxidizer jet separated until the at lest one main oxidizer jet, the at least one fuel jet, or both, has entrained a quantity of a substantially inert surrounding fluid so as to obtain substantially uniform combustion; andinjecting at least one auxiliary oxidizer jet into an auxiliary combustion zone situated upstream of the main combustion zone to stabilize the combustion in the main combustion zone, the point of injection of the at least one auxiliary oxidizer jet being arranged a distance D.sub.s away from the at least one fuel jet, D.sub.s satisfying the following relation: ##EQU11##D.sub.s being the minimum distance between the outer edge of the at least one auxiliary oxidizer jet and the outer edge of the at least one fuel jet at their respective points of injection, and A.sub.s being the cross sectional area of the at least one auxiliary oxidizer jet at its point of injection.