Premix burner and method of operating the burner
First Claim
1. Burner for burning liquid (12) and gaseous fuels (16), comprising at least two hollow sectional cone bodies (1, 2) complementing one another to form one body, having tangential air-inlet slots (5, 6) and feeds (13, 14) for gaseous (16) and liquid fuels (12), in which burner the center axes (3, 4) of the hollow sectional cone bodies (1, 2) have a conicity widening in the direction of flow and run offset from one another in the longitudinal direction, a fuel nozzle (11) for the liquid fuel (12) being placed at the burner head in the conical interior space (8) formed by the sectional cone bodies (1, 2), and the feeds (13, 14) for the gaseous fuel (16) being provided with fuel injectors (15), and the air-inlet slots (5, 6) being closed off on a combustion-chamber side by a burner sickle (26), wherein at least one bore (27) is arranged in the burner sickle (26), which bore (27) is connected to a source of gaseous fuel (16).
2 Assignments
0 Petitions
Accused Products
Abstract
In a burner of the double-cone design, bores (27) are arranged in the burner sickle (26), via which bores (27) the gaseous fuel (16), to the extent of about 3 to 8% of the total mass fuel flow, is mixed into the outer recirculation zone (28) of the burner. This leads to additional outer stabilization of the flame and to an extended operating range of the burner.
14 Citations
5 Claims
- 1. Burner for burning liquid (12) and gaseous fuels (16), comprising at least two hollow sectional cone bodies (1, 2) complementing one another to form one body, having tangential air-inlet slots (5, 6) and feeds (13, 14) for gaseous (16) and liquid fuels (12), in which burner the center axes (3, 4) of the hollow sectional cone bodies (1, 2) have a conicity widening in the direction of flow and run offset from one another in the longitudinal direction, a fuel nozzle (11) for the liquid fuel (12) being placed at the burner head in the conical interior space (8) formed by the sectional cone bodies (1, 2), and the feeds (13, 14) for the gaseous fuel (16) being provided with fuel injectors (15), and the air-inlet slots (5, 6) being closed off on a combustion-chamber side by a burner sickle (26), wherein at least one bore (27) is arranged in the burner sickle (26), which bore (27) is connected to a source of gaseous fuel (16).
Specification