Radiant tube burners and methods of operating same

摘要

A radiant tube burner (10) and a method of operating the same tube burner in which fuel and air are combusted as they pass through the tube (12) from one end thereof to the other, characterised in that an upstream region of the tube is heated by primary combustion in the tube of a fuel rich primary air/fuel mixture and a downstream region of the tube is heated by combustion in the tube (12) of secondary air fuel mixture by injecting secondary air into the tube at one or more downstream locations (66) intermediate the ends of the tube. The burner also comprises a system for reclamation of the heat from exhaust gases leaving the burner (10) which can be used to preheat gases entering the burner (10).