Patent ID: 8057222

Claim:
A direct flame impingement burner comprising: a metal block for introducing fuel and an oxidant into a combustion zone, the block including at least two outlet nozzles extending from the metal block, wherein each of the nozzles has a set of nozzle outlet openings including at least one fuel outlet opening and at least one oxidant outlet opening, and wherein the set of outlet openings in each nozzle is identical and includes corresponding fuel and oxidant outlet openings; a unitary fuel inlet through which all fuel is supplied to the metal block and a unitary oxidant inlet through which all oxidant is supplied to the metal block; wherein the oxidant inlet is connected with at least one oxidant chamber contained within the metal block that is connected with at least one oxidant outlet opening in the set of outlet openings in each nozzle by oxidant passageways of identical length and cross-sectional area; wherein the fuel inlet is connected with at least one fuel chamber within the metal block that is connected with at least one fuel outlet opening in the set of outlet openings in each nozzle by fuel passageways of identical length and cross-sectional area; wherein the oxidant passageways and the fuel passageways are each formed as channels within the metal block; wherein the fuel inlet, the oxidant inlet, the at least one fuel chamber, the at least one oxidant chamber, and the passageways are defined by holes drilled into the metal block, and wherein at least part of the holes are sealed by metal closures on sides of the metal block; wherein respective fuel passageways have identical lengths and cross-sectional areas so that the outlet pressure of fuel is equal at all corresponding fuel outlet openings in the set of outlet openings in each of the outlet nozzles; and wherein respective oxidant passageways have identical lengths and cross-sectional areas so that the outlet pressure of oxidant is equal at all corresponding oxidant outlet openings in the set of outlet openings in each of the outlet nozzles.