Flameless combustion burner for an endothermic reaction process

Abstract

The present invention relates to a combustion heater () for providing controlled heat (H) to an endothermic reaction process. The combustion heater comprises an integrated burner () to yield a hot burner exhaust gas () flow from burning a first fuel. The burner exhaust gas mixed with oxidant flows to a flue gas outlet along a flue gas flow path (FGP). Provided to the combustion chamber at a position outside a direct reach of flames from the burner is a secondary fuel conduit () with a plurality of nozzles () from which a second fuel () is transferred into a flow along the said flue gas flow path (FGP). The resulting combustion of the second fuel can be used to provide controlled heat to the to endothermic reaction operated in a reaction conduit () that is in thermal heat exchange with the combustion chamber.