Primary air exchange for a pulverized coal burner

Details Primary air exchange for a pulverized coal burner Primary air exchange for a pulverized coal burner

F - Mech Eng,Light,Heat,Weapons

23

L

110/52

F23L 15/00 (2006.01) F23D 1/02 (2006.01) F23K 3/02 (2006.01)

Patent

CA 1255970

-10- ABSTRACT OF THE DISCLOSURE A primary air exchange device for a burner of a pulverized fuel, such as coal, with burner including a supply line through which a primary air and pulverized fuel mixture is supplied. A separator having its inlet within the supply line is dimensioned to receive and remove approximately one half of the primary air while the remaining half of the primary air moves past the separator. Additionally approximately 90% of the pulverized fuel passes the separator while only about 10% of the pulverized fuel enters the separator along with approximately one half the primary air. This air and small quantity of fuel mixture is delivered from the separator to a nozzle where it is discharge into a burner throat of a furnace. Hot air is injected into the remaining mixture of half the primary air plus the large percentage of pulverized fuel to heat this fuel before it is injected into the furnace for ignition.

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