Alternative Fuel Burner with Plural Injection Ports

Abstract

A burner or furnace including a combustion chamber and two or more fuel injection ports. The fuel injection ports inject fuel at non-radial injection angles into the combustion chamber. Preferably, the injection ports feed fuel substantially tangentially to a cyclonic vortex in the burner or furnace during operation. Also preferably, the injection ports are angled downward 5 to 15 degrees from a plane perpendicular to an axis of the burner or furnace.

1 . A burner or furnace, comprising:
 a combustion chamber; and   two or more fuel injection ports;   wherein the fuel injection ports inject fuel at non-radial injection angles into the combustion chamber.   
   
   
       2 . A burner or furnace as in  claim 1 , wherein the injection ports feed fuel substantially tangentially to a cyclonic vortex in the burner or furnace during operation. 
   
   
       3 . A burner or furnace as in  claim 1 , wherein the injection ports are arranged in one or more pairs, with the injection ports of each pair offset from each other by 165 to 180 degrees. 
   
   
       4 . A burner or furnace as in  claim 1 , wherein the injection ports are angled from 5 to 15 degrees from a plane perpendicular to an axis of the burner or furnace. 
   
   
       5 . A burner or furnace as in  claim 1 , wherein the injection angles for all of the fuel injection ports are the same. 
   
   
       6 . A burner or furnace as in  claim 1 , wherein the injection angles for different fuel injection ports are different. 
   
   
       7 . A burner or furnace as in  claim 1 , wherein one or more of the injection angles are fixed. 
   
   
       8 . A burner or furnace as in  claim 1 , wherein one or more of the injection angles are adjustable. 
   
   
       9 . A burner or furnace as in  claim 1 , wherein a cross section of the combustion chamber is circular. 
   
   
       10 . A burner or furnace as in  claim 1 , wherein a cross section of the combustion chamber is non-circular. 
   
   
       11 . A method of burning fuels, comprising the steps of:
 starting burning in a combustion chamber; and   injecting fuel into the combustion chamber using two or more fuel injection ports;   wherein the fuel injection ports inject fuel at non-radial injection angles into the combustion chamber.   
   
   
       12 . A method as in  claim 11 , wherein the injection ports feed fuel substantially tangentially to a cyclonic vortex in the burner or furnace during operation. 
   
   
       13 . A method as in  claim 11 , wherein the injection ports are arranged in one or more pairs, with the injection ports of each pair offset from each other by 165 to 180 degrees. 
   
   
       14 . A method as in  claim 11 , wherein the injection ports are angled from 5 to 15 degrees from a plane perpendicular to an axis of the burner or furnace. 
   
   
       15 . A method as in  claim 11 , wherein the injection angles for all of the fuel injection ports are the same. 
   
   
       16 . A method as in  claim 11 , wherein the injection angles for different fuel injection ports are different. 
   
   
       17 . A method as in  claim 11 , wherein one or more of the injection angles are fixed. 
   
   
       18 . A method as in  claim 11 , wherein one or more of the injection angles are adjustable. 
   
   
       19 . A method as in  claim 11 , wherein a cross section of the combustion chamber is circular. 
   
   
       20 . A method as in  claim 11 , wherein a cross section of the combustion chamber is non-circular.