Burner for a kiln

A burner for a kiln comprising

• an elongated tubular body having a longitudinal axis and a discharge end adjacent a combustion zone comprising a flame,
• at least one fuel supply pipe for transporting and ejecting fuel through a first fuel pipe outlet at the discharge end, and
• a number of high speed first primary air jet outlets for ejecting primary air, the first primary air jet outlets being located at the discharge end and being arranged, when viewed towards the discharge end, along a circular closed line, radially outwardly of the first fuel outlet and surrounding the fuel outlet,
• wherein at least one of the first primary air jet outlets comprises a single orifice outlet or a multiple orifice outlet forming a flat jet air outlet having a major axis and a minor axis, the flat jet air outlet being configured to eject a flat jet air stream in a direction which is converging relative to the longitudinal axis;
• the flat jet air stream having a flat fan pattern with a predetermined fan angle, the flat jet air stream being configured to regulate an amount of secondary air used for combusting fuel ejected through the first fuel pipe outlet;
• and, the flat jet air outlet being oriented such that its major axis is not tangent to the circular closed line when viewed towards the discharge end.

A burner for a kiln comprising

• an elongated tubular body having a longitudinal axis and a discharge end adjacent a combustion zone comprising a flame,
• at least one fuel supply pipe for transporting and ejecting fuel through a first fuel pipe outlet at the discharge end, and
• a number of high speed first primary air jet outlets for ejecting primary air, the first primary air jet outlets being located at the discharge end and being arranged, when viewed towards the discharge end, along a circular closed line, radially outwardly of the first fuel outlet and surrounding the fuel outlet,
• wherein at least one of the first primary air jet outlets comprises a single orifice outlet or a multiple orifice outlet forming a flat jet air outlet having a major axis and a minor axis, the flat jet air outlet being provided to a lower portion of the discharge end and being configured to eject a flat jet air stream having a flat fan pattern with a predetermined fan angle;
• wherein the flat jet air outlet is configured to be adjusted or set to allow secondary air to pass a barrier formed by adjacent flat jet air outlets to prevent fuel ejected through the first fuel pipe outlet from dropping out of the flame;
• and wherein the flat jet air outlet being oriented such that its major axis is not tangent to the circular closed line when viewed towards the discharge end.