Combustion head for a burner

A combustion head for a burner, the combustion head comprising an outer sleeve (2), which has a longitudinal axis (3) and is provided with a first free end (7) connected to a pneumatic ventilation device designed to feed oxidizing air along the outer sleeve (2);

• a first feeding device (9;
• 52), which is mounted in the outer sleeve (2) in order to feed a gaseous fuel to a second free end (8) of the outer sleeve (2) and into the oxidizing air;
• at least one first swirl device (17;
• 60), which is mounted in the outer sleeve (2) so as to cause a primary flow F1 of gaseous fuel and oxidizing air to make a helical movement around and along said longitudinal axis (3);
• and at least one first feeding channel (33) with an annular shape, which is obtained between the outer sleeve (2) and the first swirl device (17;
• 60) and is pneumatically connected to the first free end (7) of the outer sleeve (2) in order to feed a secondary flow F2 of oxidizing air around the primary flow F1;
• and being characterized in that it further comprises a second feeding device (40), which is mounted on the outside of the outer sleeve (2) and is connected to a gaseous fuel source;
• wherein the first swirl device (17) has a tubular shape, is delimited by a side wall (25) extending around said longitudinal axis (3) and is further delimited by a bottom wall (26), which is substantially perpendicular to the longitudinal axis (3), wherein the first swirl device (17) has a plurality of feeding holes (27), which are obtained through the side wall (25) crosswise to said longitudinal axis (3), and a plurality of feeding channels (28), which are obtained through the bottom wall (26) and are inclined according to an angle ranging from 0° to 90° relative to the bottom wall (26).

A combustion head for a burner, the combustion head comprising an outer sleeve (2), which has a longitudinal axis (3) and is provided with a first free end (7) connected to a pneumatic ventilation device designed to feed oxidizing air along the outer sleeve (2);

• a first feeding device (9;
• 52), which is mounted in the outer sleeve (2) in order to feed a gaseous fuel to a second free end (8) of the outer sleeve (2) and into the oxidizing air;
• at least one first swirl device (17;
• 60), which is mounted in the outer sleeve (2) so as to cause a primary flow F1 of gaseous fuel and oxidizing air to make a helical movement around and along said longitudinal axis (3);
• and at least one first feeding channel (33) with an annular shape, which is obtained between the outer sleeve (2) and the first swirl device (17;
• 60) and is pneumatically connected to the first free end (7) of the outer sleeve (2) in order to feed a secondary flow F2 of oxidizing air around the primary flow F1;
• and being characterized in that it further comprises a second feeding device (40), which is mounted on the outside of the outer sleeve (2) and is connected to a gaseous fuel source;
• the combustion head further comprising a second feeding channel (39) with an annular shape, which is obtained between the outer sleeve (2) and the first feeding channel (33) and is pneumatically connected to the first free end (7) of the outer sleeve (2) so as to feed a tertiary flow F3 of oxidizing air around the primary flow F1.

A combustion head for a burner, the combustion head comprising an outer sleeve (2), which has a longitudinal axis (3) and is provided with a first free end (7) connected to a pneumatic ventilation device designed to feed oxidizing air along the outer sleeve (2);

• a first feeding device (9;
• 52), which is mounted in the outer sleeve (2) in order to feed a gaseous fuel to a second free end (8) of the outer sleeve (2) and into the oxidizing air;
• at least one first swirl device (17;
• 60), which is mounted in the outer sleeve (2) so as to cause a primary flow F1 of gaseous fuel and oxidizing air to make a helical movement around and along said longitudinal axis (3);
• and at least one first feeding channel (33) with an annular shape, which is obtained between the outer sleeve (2) and the first swirl device (17;
• 60) and is pneumatically connected to the first free end (7) of the outer sleeve (2) in order to feed a secondary flow F2 of oxidizing air around the primary flow F1;
• and being characterized in that it further comprises a second feeding device (40), which is mounted on the outside of the outer sleeve (2) and is connected to a gaseous fuel source;
• wherein the first feeding device (52) comprises a feeding duct (53), which is housed inside the outer sleeve (2), and a deflector block (56), which faces an outlet end (55) of the feeding duct (53);
• the feeding duct (53) and the deflector block (56) being arranged at a given distance from one another so as to allow the gaseous fuel to be fed through the outlet end (55).