US2013095437A1PendingUtilityA1

Oxy-Fuel Furnace and Method of Heating Material in an Oxy-Fuel Furnace

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Individually held — no corporate assignee on recordPriority: Apr 5, 2011Filed: Apr 4, 2012Published: Apr 18, 2013
Est. expiryApr 5, 2031(~4.7 yrs left)· nominal 20-yr term from priority
Inventors:Gregory J. BuraginoShailesh Pradeep GangoliXiaoyi HeAleksandar Georgi Slavejkov
F23C 5/32F23L 7/007F23C 3/006Y02E20/34F23D 99/002F23D 14/58
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PatentIndex Score
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Claims

Abstract

An oxy-fuel furnace and method of heating material in an oxy-fuel furnace are disclosed. The method includes combusting oxygen and fuel with an oxy-fuel burner arrangement in the oxy-fuel furnace forming combustion gases, and maintaining a vortex including the combustion gases within a central region of an enclosure of the oxy-fuel furnace. The oxy-fuel burner arrangement includes a plurality of high momentum oxy-fuel burners arranged at an angle to generate the vortex, the angle being greater than 15 degrees but less than 75 degrees with respect to a furnace wall boundary of the enclosure, an angular velocity of greater than 0.07 radians per second, or a combination thereof. The furnace includes an oxy-fuel burner arrangement including at least two high momentum oxy-fuel burners having high shape factor nozzle geometries, and an enclosure. The vortex increases convective heating within the enclosure and uniformity of heating within the enclosure.

Claims

exact text as granted — not AI-modified
1 . A method for heating material in an oxy-fuel furnace, the method comprising:
 combusting oxygen and fuel with an oxy-fuel burner arrangement in the oxy-fuel furnace forming combustion gases; and   maintaining a vortex including the combustion gases within a central region of an enclosure of the oxy-fuel furnace;   wherein the oxy-fuel burner arrangement comprises a plurality of high momentum oxy-fuel burners arranged at an angle to generate the vortex, the angle being greater than 15 degrees but less than 75 degrees with respect to a furnace wall boundary of the enclosure.   
     
     
         2 . The method of  claim 1 , wherein at least one of the plurality of high momentum oxy-fuel burners includes a high shape factor nozzle. 
     
     
         3 . The method of  claim 1 , wherein the plurality of high momentum oxy-fuel burners includes staggered burners. 
     
     
         4 . The method of  claim 1 , wherein the plurality of high momentum oxy-fuel burners includes two burners. 
     
     
         5 . The method of  claim 1 , wherein the plurality of high momentum oxy-fuel burners includes four burners. 
     
     
         6 . The method of  claim 1 , wherein the plurality of high momentum oxy-fuel burners includes more than four burners. 
     
     
         7 . The method of  claim 1 , wherein the vortex has an angular velocity that is greater than a 0.07 radians per second. 
     
     
         8 . The method of  claim 1 , wherein the angle is between about 30 degrees and about 60 degrees. 
     
     
         9 . The method of  claim 1 , wherein the vortex induces convective heat in an area of the enclosure, the area being between about 15% and about 75% of the enclosure. 
     
     
         10 . The method of  claim 1 , wherein the vortex induces convective heat in an area of the enclosure, the area being between about 30% and about 60% of the enclosure. 
     
     
         11 . The method of  claim 1 , wherein the enclosure has a first pressure within the vortex that is less than a second pressure that is proximal to the furnace wall boundary of the enclosure. 
     
     
         12 . The method of  claim 1 , further comprising heating metal within the enclosure. 
     
     
         13 . The method of  claim 1 , further comprising heating aluminum within the enclosure. 
     
     
         14 . The method of  claim 1 , wherein the vortex increases convective heating within the enclosure. 
     
     
         15 . The method of  claim 1 , wherein the vortex increases uniformity of heating within the enclosure. 
     
     
         16 . A method for heating material in an oxy-fuel furnace, the method comprising:
 combusting oxygen and fuel with an oxy-fuel burner arrangement in the oxy-fuel furnace forming combustion gases; and   maintaining a vortex including the combustion gases within a central region of an enclosure of the oxy-fuel furnace;   wherein the vortex has an angular velocity of greater than 0.07 radians per second.   
     
     
         17 . The method of  claim 16 , wherein at least one of the plurality of high momentum oxy-fuel burners includes a non-circular nozzle geometry. 
     
     
         18 . The method of  claim 16 , wherein the plurality of high momentum oxy-fuel burners includes staggered burners. 
     
     
         19 . The method of  claim 16 , wherein the angle is greater than 15 degrees but less than 75 degrees with respect to a furnace wall boundary of the enclosure. 
     
     
         20 . An oxy-fuel furnace, comprising:
 an oxy-fuel burner arrangement including at least two high momentum oxy-fuel burners having high shape factor nozzles; and   an enclosure;   wherein the oxy-fuel burner arrangement comprises a plurality of high momentum oxy-fuel burners arranged at an angle to generate a vortex, the angle being greater than 15 degrees but less than 75 degrees with respect to a furnace wall boundary of the enclosure;   wherein the vortex increases convective heating within the enclosure and uniformity of heating within the enclosure.

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