Assisted flameless oxidation operation and burner therefor

摘要

In a burner and method for the operation of such a burner which is provided with first fuel and air supply means for FLOX® operation and second fuel and air supply means for operation with flame combustion, a control unit is provided for controlling fuel and air supply means in such a manner that, aided by flame combustion operation, the temperature required for FLOX® operation is rapidly achieved and FLOX® operation can be maintained at least in the region directly in front of the burner so as to provide for assisted FLOX® operation of the burner already before the conditions for pure FLOX® operation are established.

主权项

1. A method for the operation of a burner (1) for heating a furnace space (2), the burner including first fuel and air supply means (11) for a flameless combustion of fuel injected into the furnace space (2) via a central fuel injection nozzle (18) and second fuel and air supply means (25) for supplying fuel and air to a combustion chamber (15) within the burner for combustion therein to produce a hot gas for heating the furnace space (2), and a control unit (14) for controlling the first and second fuel and air supply means (11, 25), the method comprising the steps of: after warm-up operation (A) of the furnace space (2) to a first temperature threshold by activation of flame combustion of the fuel and air in the combustion chamber (15), establishing a flameless combustion operation (B) of the first fuel and air supply means (11) assisted by hot combustion gas generated in the combustion chamber (15) by the combustion of the fuel and air of the second fuel and air supply means (25) and discharged via an annular discharge opening (17) extending around the central fuel injection nozzle (18) so as to form a hot gas envelop around the fuel jet injected into the furnace space (2) via the central fuel nozzle (18).