Patent ID: 8573965

Claim:
A method of operating a pyrolysis heater comprising: introducing a first fuel and a first oxidant gas into the pyrolysis heater through a first wall burner positioned in a row of wall burners, wherein the first wall burner is a premix burner, the first wall burner having a first equivalence ratio, φ 1 ; and introducing at least one of the first fuel and a second fuel and at least one of the first oxidant gas and a second oxidant gas into the pyrolysis heater through a first floor burner positioned in a row of floor burners, wherein the first floor burner is a non-premix burner, the first floor burner having a second equivalence ratio, φ 2 ; wherein φ 1 <0.91<φ 2 ≦1.0. and φ 1< 0.95×φ 2 .