Patent ID: 7051530

Claim:
A burner apparatus for burning fuel and air to a combustion gas comprising: a premixing chamber for premixing the fuel and the air with an air inlet for the air to enter said premixing chamber and having a cross-sectional area; a fuel inlet for the fuel to enter said premixing chamber; and an outlet for a mixture of the air and the fuel to exit said premixing chamber, wherein said fuel inlet is located between said air inlet and said outlet, further comprising at least one air blocking member situated at the air inlet which blocks a portion of the air flow and which cooperates with the fuel inlet to create a region having a locally enriched fuel mixture toward a wall of the burner, the locally enriched fuel mixture producing a locally higher combustion temperature effective to suppress a formation of combustion vibrations and to reduce an amount of carbon monoxide produced during combustion when compared to combustion in said burner apparatus with no such air blocking member.