End apparatus comprising a progressive combustion head for low nox emissions and burner comprising this end apparatus

An end apparatus (1) for a burner configured to generate a flame, comprising:

• a combustion head (2) connectable to supply means for supplying a fuel and having at least one inlet opening (3), adapted to enable a fuel to enter, and a plurality of outlet openings (4), adapted to enable an outflow of fuel;
• a comburent supply conduit (5) configured to convey a comburent to said combustion head (2) and extending between a comburent introduction opening (6) and an emission opening (7) along a main extension direction (X);
• wherein said combustion head (2) is at least partially inserted into said supply conduit (5), at the emission opening (7), so as to define a passage gap (9) between said combustion head (2) and said supply conduit (5) for a flow of comburent (C);
• characterized in that said combustion head (2) comprises:
• a plurality of outer openings (11) arranged outside said passage gap (9) according to a direction that is radial to said main extension direction (X) and configured to emit a first flow of fuel (F1) outside said flow of a comburent;
• and
• a plurality of inner openings (12) arranged at and/or inside said passage gap (9) according to a direction that is radial to said main extension direction (X), said inner openings (12) being adapted to introduce a second flow of fuel (F2′, F2″) inside said flow of a comburent.