Preheater burner unit for a burner for the direct combustion of ammonia and recuperator burner so that

Abstract

Preheater burner unit (100) for a burner for the direct combustion of ammonia, with an outer jacket (50) and with a combustion chamber tube (30) which tapers towards a burner mouth (31) and in which at least one burner nozzle (40) is positioned, at which at least one ammonia supply line and one primary air line open, through which ammonia and fresh air are directed to the burner nozzle (40), characterized in that the ammonia supply line is led at least with a partial section of its length over the outer circumference of the combustion chamber tube (30) to the burner nozzle (40) and forms a heating channel there which contacts the outer circumference of the combustion chamber tube (30), the length of which is a multiple of the axial length of the combustion chamber tube (30).