Device and method for flame stabilization in a burner

Abstract

A device and a method for flame stabilization in a burner (), includes a burner housing at least partially enclosing a burner volume, into which may be introduced via at least one fuel line, fuel, and via at least one air feed means, air, forming an air/fuel mixture spreading in a preferred flow direction, which may be ignited in a combustion chamber () connecting downstream of the burner housing to form a stationary flame (). Upstream of the flame (), a catalyst arrangement () is provided through which an air/pilot fuel mixture (), separate from the air/fuel mixture, is flowable. The catalyst arrangement () has at least two catalyst stages which are located one behind the other in the through-flow direction, of which the catalyst stage () located upstream, the so-called POX-catalyst, is flow-washable by the air/pilot fuel mixture () with an air/pilot fuel mixture ratio λ<1, by which catalyst stage () the air/pilot fuel mixture () is partially oxidized, and of which catalyst stages the downstream catalyst stage (), the so-called FOX-catalyst, is flow-washable by a leaned air/pilot fuel mixture () with a mixture ratio λ>1, by which the leaned air/pilot fuel mixture is completely oxidized forming an inert hot gas flow ().