Burner and Method of Operation

The burner of claim 29, wherein

• i) the diameter of the primary fuel exit holes (23) is defined as D0, wherein D0/D2 is between 0.04 and 0.5;
• and/or
• ii) the diameter of the purge holes (32) is defined as D1, wherein D1/D2 is between 0.04 and 0.5 and/or
• iii) the outer diameter of the ignition source (10) is defined as D2 and the inner diameter of the primary fuel conduit (20) is defined as D3, wherein D3/D2 is from 1.5 to 4.5, in particular from 2.0 to 3.0;
• and/or
• iv) the outer diameter of the ignition source (10) is defined as D2 and the inner diameter of the main oxidant conduit (30) is defined as D4, wherein D4/D2 is from 3.0 to 9.0, in particular from 3.5 to 5.5;
• and/or
• v) the outer diameter of the ignition source (10) is defined as D2 and the inner diameter of the secondary fuel conduit (40) is defined as D5, wherein D5/D2 is from 5.0 to 11.0, in particular from 5.5 to 7.0;
• and/or
• vi) the outer diameter of the ignition source (10) is defined as D2 and the distance between the centers of two secondary oxidant conduits (50) located opposite from each other in relation to the main axis (2) of the burner is defined as D6, wherein D6/D2 is from 9.0 to 22.0, in particular from 10.0 to 14.0;
• and/or
• vii) the inner diameter of the secondary fuel conduit (40) is defined as D5 and the distance between the centers of two secondary oxidant conduits (50) located opposite from each other in relation to the main axis (2) of the burner is defined as D6, wherein D6/D5 is from 1.75 to 2.5, in particular from 1.8 to 2.1;
• and/or
• viii) the diameter of the air premixing holes (27) is defined as P0, wherein P0/D2 is between 0.02 and 0.2;
• and/or
• ix) the inner diameter of the bleed holes (28) is defined as P1;
• wherein P1/D2 is between 0.05 and 0.4;
• and/or
• x) the distance between the primary fuel conduit end plane (24) and the intermediate annular conduit end plane (36) is defined as L1 and the distance between the primary fuel conduit wall (29) and the intermediate annular conduit wall (37) is defined as L4, wherein L1/L4 is from 0.5 to 2.5, in particular from 1.0 to 2.0;
• and/or
• xi) the distance between the primary fuel conduit end plane (24) and the intermediate annular conduit end plane (36) is defined as L1, the distance between the intermediate annular conduit end plane (36) and the main oxidant conduit end plane (38) is defined as L2 and the inner diameter of the primary fuel conduit (20) is defined as D3, wherein (L1+L2)/D3 is from 0.25 to 1.0, in particular from 0.4 to 0.6;
• and/or
• xii) the distance between the main oxidant conduit end plane (38) and the secondary fuel conduit end plane (46) is defined as L3, and the inner diameter of the main oxidant conduit (30) is defined as D4, wherein L3/D4 is from 0.05 to 0.25, in particular from 0.1 to 0.2;
• and/or
• xiii) wherein the distance between the primary fuel outlet (22) and the primary fuel conduit end plane (24) and/or ignition chamber end plane (26) is defined as L0 and the inner diameter of the primary fuel conduit (20) is defined as D3, wherein L0/D3 is from 0.25 to 1.0, in particular from 0.4 to 0.6;
• and/or
• xiv) the distance between two rows of bleed holes (28) measured between their centers is defined as H and the inner diameter of the bleed holes (28) is defined as P1, wherein H/P1 is from 1.25 to 2.5;
• and/or
• xv) the inner diameter of the secondary oxidant conduits (50) is defined as D7, wherein D7/D2 is between 0.15 to 1.0, in particular from 0.25 to 0.75.