초록 ▼

A flat-flame burner for reheat, holding, and heat-treatment furnaces for treating iron and steel products. It has at least one fuel-injection pipe lying along the axis of the body of the burner, a combustion tunnel and a combustion-air feed, the air being distributed in and by the body. The fuel is

A flat-flame burner for reheat, holding, and heat-treatment furnaces for treating iron and steel products. It has at least one fuel-injection pipe lying along the axis of the body of the burner, a combustion tunnel and a combustion-air feed, the air being distributed in and by the body. The fuel is introduced via the injection pipe or pipes through at least one axial orifice lying in a plane close to the external plane of the combustion tunnel, into the combustion products. This produces a first dilution of the fuel in these combustion products, the fuel/combustion products mixture thus obtained being diluted further in the combustion air.

대표청구항 ▼

1. A method for mixing fuel, air and recirculating combustions gases at the head of a furnace burner, comprising the steps:locating a combustion tunnel having an outwardly flared end with an exit opening into the furnace; creating a vortex of recirculating combustion gases at the exit; positioning a

1. A method for mixing fuel, air and recirculating combustions gases at the head of a furnace burner, comprising the steps:locating a combustion tunnel having an outwardly flared end with an exit opening into the furnace; creating a vortex of recirculating combustion gases at the exit; positioning a fuel injection pipe, serving as a burner head, and axially extending through the tunnel and having an orifice sufficiently close to the tunnel exit for directly injecting fuel at low momentum exclusively into the vortex of recirculating combustion gases present at the exit, without penetrating the vortex, to form a first premixture; positioning a combustion air feed pipe to axially extend along a length of the fuel injection pipe, and located radically outward there from, for circulating air around the orifice of the fuel injection pipe thereby inducing the vortex, the air mixing with the recirculating combustion gases in a zone removed from the vortex for further diluting the first premixture in the zone and for ensuring that combustion takes place in a flame development plane in the immediate vicinity of the burner head orifice.