ECCENTRIC JET TYPE LOW NOx OXYFUEL BURNER

Abstract

Disclosed is an eccentric jet type low NO X oxyfuel burner for gaseous fuel, which freely controls the shape of a flame and a combustion characteristic by using an eccentric injection nozzle. The disclosed oxyfuel burner reduces an optimum mixture rate forming area in comparison with a conventional coaxial-injection, and enlarges a thin fuel area and an excessive fuel area so that partial generation of a flame with a high temperature is restricted. Therefore, an amount of generated nitrogen oxide can be minimized and the stability of a flame can be significantly improved. Particularly, the oxyfuel burner combines a fuel nozzle and an oxygen combustion nozzle having different diameters so as to use them so that it is very simple and practical to design and manufacture the oxyfuel burner.

What is claimed is: 
     
         1 . An eccentric jet type low NO X  oxyfuel burner for gaseous fuel, comprising:
 an oxygen combustion pipe inserted within a burner tile so as to be concentrically positioned respective to a central axis of the burner tile, the oxygen combustion pipe comprising an oxygen feeding pipe connected to one side portion of a circumferential surface of the oxygen combustion pipe so that oxygen is supplied through an oxygen feeding inlet provided at one end of the oxygen feeding pipe, and an oxygen combustion nozzle for injecting the supplied oxygen, provided at one end of the oxygen combustion pipe; and   a fuel combustion pipe inserted within the oxygen combustion pipe so as to be concentrically positioned respective to a central axis of the oxygen combustion pipe, the fuel combustion pipe comprising a fuel feeding pipe connected to one end of the fuel combustion pipe so that fuel is supplied through a fuel feeding inlet provided at one end of the fuel feeding pipe, and a fuel combustion nozzle provided at a same side as the oxygen combustion nozzle so as to inject fuel at a position deviating as much as a certain multiple of a set measurement from a central axis of the oxygen combustion pipe.   
     
     
         2 . The eccentric jet type low NO X  oxyfuel burner for the gaseous fuel as claimed in  claim 1 , wherein the fuel combustion pipe is capable of rotating about a central axis of the oxygen combustion pipe. 
     
     
         3 . The eccentric jet type low NO X  oxyfuel burner for the gaseous fuel as claimed in  claim 2 , wherein a rotating flange is driven by a driving means provided at one end of the oxygen combustion pipe so that the fuel combustion pipe rotates. 
     
     
         4 . The eccentric jet type low NO X  oxyfuel burner for the gaseous fuel as claimed in  claim 1 , wherein a center of the fuel combustion nozzle symmetrically moves while having a predetermined interval from a center of the oxygen combustion pipe. 
     
     
         5 . An eccentric jet type low NO X  oxyfuel burner for gaseous fuel, comprising:
 a fuel combustion pipe inserted within a burner tile so as to be concentrically positioned respective to a central axis of the burner tile, the fuel combustion pipe comprising a fuel feeding pipe connected to one side portion of a circumferential surface of the fuel combustion pipe so that fuel is supplied through a fuel feeding inlet provided at one end of the fuel feeding pipe, and a fuel combustion nozzle for injecting the supplied fuel, provided at one end of the fuel combustion pipe; and   an oxygen combustion pipe inserted within the fuel combustion pipe so as to be concentrically positioned respective to a central axis of the fuel combustion pipe, the oxygen combustion pipe comprising an oxygen feeding pipe connected to one end of the oxygen combustion pipe so that oxygen is supplied through an oxygen feeding inlet provided at one end of the oxygen feeding pipe, and an oxygen combustion nozzle provided at a same side as the fuel combustion nozzle so as to inject oxygen at a position deviating as much as a certain multiple of a set measurement from a central axis of the fuel combustion pipe.   
     
     
         6 . The eccentric jet type low NO X  oxyfuel burner for the gaseous fuel as claimed in  claim 5 , wherein the oxygen feeding pipe is capable of rotating about a central axis of the fuel feeding pipe. 
     
     
         7 . The eccentric jet type low NO X  oxyfuel burner for the gaseous fuel as claimed in  claim 6 , wherein a rotating flange is driven by a driving means provided at one end of the fuel combustion pipe so that the oxygen combustion pipe rotates. 
     
     
         8 . The eccentric jet type low NO X  oxyfuel burner for the gaseous fuel as claimed in  claim 5 , wherein a center of the oxygen combustion nozzle symmetrically moves while having a predetermined interval from a center of the fuel combustion pipe.