Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
262 words
In a burner system for burning gaseous or liquid fuel, the improved construction for minimization of the production of NOx, comprising; (a) a primary burner means comprising; 1. a liquid burner tube and means to supply liquid fuel under pressure to said liquid burner tube; said liquid burner tube closed at its distal end; said closure including a plurality of ports arranged symmetrically, each port in a radial plane, and at a selected angle A to the axis of said liquid burner tube; 2. a gaseous burner tube comprising a pair of coaxial tubes, with means to supply gas under pressure to the annular space between said two tubes; the annular space closed at the distal end; said closure including a plurality of ports arranged symmetrically, each port in a radial plane, and at a selected angle B to the axis of said gaseous burner tube; (b) means to supply combustion air around the outer surface of said gaseous burner tube; (c) secondary burner means surrounding said gaseous burner tube, and upstream a selected distance from said ports, and means to supply a selected quantity of secondary gaseous fuel to said secondary burner means to form a whirling annulus of flame about said gaseous burner tube, an annular opening between said gaseous burner tube and said secondary burner means; whereby said secondary burner means utilizes part of said combustion air to burn said secondary gaseous fuel; whereby the products of combustion of said secondary fuel burning, move with said combustion air downstream, into the zone of combustion of said primary combustion means.
Claim 2
Dependent Claim
262 words
In a burner system for burning gaseous or liquid fuel, the improved construction for minimization of the production of NOx, comprising; (a) a primary burner means comprising; 1. a liquid burner tube and means to supply liquid fuel under pressure to said liquid burner tube; said liquid burner tube closed at its distal end; said closure including a plurality of ports arranged symmetrically, each port in a radial plane, and at a selected angle A to the axis of said liquid burner tube; 2. a gaseous burner tube comprising a pair of coaxial tubes, with means to supply gas under pressure to the annular space between said two tubes; the annular space closed at the distal end; said closure including a plurality of ports arranged symmetrically, each port in a radial plane, and at a selected angle B to the axis of said gaseous burner tube; (b) means to supply combustion air around the outer surface of said gaseous burner tube; (c) secondary burner means surrounding said gaseous burner tube, and upstream a selected distance from said ports, and means to supply a selected quantity of secondary gaseous fuel to said secondary burner means to form a whirling annulus of flame about said gaseous burner tube, an annular opening between said gaseous burner tube and said secondary burner means; whereby said secondary burner means utilizes part of said combustion air to burn said secondary gaseous fuel; whereby the products of combustion of said secondary fuel burning, move with said combustion air downstream, into the zone of combustion of said primary combustion means.
Claim 3
Dependent Claim
38 words
The system as in claim 1, in which said selected quantity of secondary fuel burning comprises an energy rate in the range of 10% to 25% of the energy rate of said fuel, to said primary burner means.
Claim 4
Dependent Claim
18 words
The system as in claim 2 in which said percentages are in the range of 10% to 15%.
Claim 5
Dependent Claim
16 words
The system as in claim 2 in which said angles A and B are substantially equal.
Claim 6
Dependent Claim
77 words
The system as in claim 1 in which said secondary burner means comprises; (a) an annular plate coaxial with, and in a plane substantially perpendicular to, and surrounding and spaced from, said gaseous fuel burner tube; (b) a short cylindrical tubular flange attached and sealed to the outer circumference of said annular plate, and extending downstream thereof; and (c) means to provide a circumferential flow of gaseous fuel in the downstream angle of said secondary burner means.