High efficiency bio-fuel pellet and grain furnace

Abstract

A high efficiency bio-fuel pellet and corn burning furnace. The furnace has a series of augers to load the fuel into the burn pot, move the fuel through the burn pot and finally remove the ash from the system. The burn pot or combustion area as two parallel augers with counter rotating flights so as to move the combustible material towards the area between the burn pot augers and from one side of the burn pot to the other during combustion so as to prevent clumping and aid in complete combustion.

1 . A solid bio-fuel burning furnace that uses bio-fuel pellets, corn, or other similarly shaped combustible material for fuel said furnace comprising: 
 an elongate burn pot for containing said fuel during combustion said burn pot having a first and second end;    a feed auger for moving said fuel into said first end of said burn pot from outside of said burn pot; and    a first elongate auger in said burn pot for moving fuel placed in said burn pot by said feed auger from said burn pots first end to said burn pots second end during combustion.    
   
   
       2 . A solid bio-fuel burning furnace as in  claim 1  wherein said elongate burn pot is substantially U-shaped in its cross section.  
   
   
       3 . A solid bio-fuel burning furnace as in  claim 2  wherein said burn pot further defines a plurality of ventilation holes for aiding the combustion of said fuel.  
   
   
       4 . A solid bio-fuel burning furnace as in  claim 3  further comprising a second elongate auger parallel to said first elongate auger in said burn pot for moving fuel placed in said burn pot by said feed auger from said burn pots first end to said burn pots second end during combustion.  
   
   
       5 . A solid bio-fuel burning furnace as in  claim 4  wherein said first elongate auger has a counterclockwise screw component and said second elongate auger has a clockwise screw component.  
   
   
       6 . A solid bio-fuel burning furnace as in  claim 5  wherein said second end of said burn pot defines an ash exit hole.  
   
   
       7 . A solid bio-fuel burning furnace as in  claim 6  further comprising an ash auger for moving ash that passes through said ash exit hole to an ash collection box.  
   
   
       8 . A solid bio-fuel burning furnace as in  claim 7  wherein said feed auger and said first and second elongate augers and said ash auger are connected via a chain drive system.  
   
   
       9 . A solid bio-fuel burning furnace as in  claim 8  further comprising a motor for driving said chain drive system.  
   
   
       10 . A solid bio-fuel pellet and solid grain fuel burning furnace comprising: 
 an elongate burn pot for containing said fuel during combustion said burn pot having a first and second end;    a first elongate auger in said burn pot for moving fuel placed in said burn pot by said feed auger from said burn pots first end to said burn pots second end during combustion said first elongate auger having a counterclockwise screw component; and    a second elongate auger parallel to said first elongate auger in said burn pot for moving fuel placed in said burn pot by said feed auger from said burn pots first end to said burn pots second end during combustion said second elongate auger having a clockwise screw component so that said first and second auger work to move said fuel to the center of said burn pot from said burn pots first end to said burn pots second end.    
   
   
       11 . A solid bio-fuel burning furnace as in  claim 10  wherein said elongate burn pot is substantially U-shaped in its cross section.  
   
   
       12 . A solid bio-fuel burning furnace as in  claim 11  wherein said burn pot further defines a plurality of ventilation holes for aiding the combustion of said fuel and second end of said burn pot defines an ash exit hole.  
   
   
       13 . A solid bio-fuel burning furnace as in  claim 12  further comprising an ash auger for moving ash that passes through said ash exit hole to an ash collection box.  
   
   
       14 . A solid bio-fuel burning furnace as in  claim 13  further comprising a chain drive system connecting said first and second elongate augers and said ash auger.  
   
   
       15 . A solid bio-fuel burning furnace as in  claim 14  further comprising a motor for driving said chain drive system.  
   
   
       16 . A solid bio-fuel pellet and solid grain fuel burning furnace comprising: 
 an elongate burn pot for containing said fuel during combustion said burn pot having a first and second end;    a feed auger for moving said fuel into said first end of said burn pot from outside of said burn pot;    a first elongate auger in said burn pot for moving fuel placed in said burn pot by said feed auger from said burn pots first end to said burn pots second end during combustion said first elongate auger having a counterclockwise screw component; and    a second elongate auger parallel to said first elongate auger in said burn pot for moving fuel placed in said burn pot by said feed auger from said burn pots first end to said burn pots second end during combustion said second elongate auger having a clockwise screw component so that said first and second auger work to move said fuel to the center of said burn pot from said burn pots first end to said burn pots second end.    
   
   
       17 . A solid bio-fuel burning furnace as in  claim 16  wherein said elongate burn pot is substantially U-shaped in its cross section.  
   
   
       18 . A solid bio-fuel burning furnace as in  claim 17  wherein said burn pot further defines a plurality of ventilation holes for aiding the combustion of said fuel and second end of said burn pot defines an ash exit hole.  
   
   
       19 . A solid bio-fuel burning furnace as in  claim 18  further comprising an ash auger for moving ash that passes through said ash exit hole to an ash collection box.  
   
   
       20 . A solid bio-fuel burning furnace as in  claim 19  further comprising a chain drive system connecting said feed auger and said first and second elongate augers and said ash auger and a motor from driving said chain drive system.