Apparatus and method to improve pulverizer and reduce no_...

Details Apparatus and method to improve pulverizer and reduce no_... Apparatus and method to improve pulverizer and reduce no_...

F - Mech Eng,Light,Heat,Weapons

23

K

F23K 1/04 (2006.01)

Patent

CA 2095985

An apparatus and method to improve pulverizer operation and reduce nitrogen oxide emissions from furnaces which burn pulverized coal from at least one pulverizer. A duct type burner burns a fuel in the primary air which heats the primary air supplied to the pulverizers. The combustion increases the primary air temperature and improves the drying of the coal, thus improving the pulverizer throughput and/or the fineness of the pulverized coal. Operation of the duct burner also reduces the oxygen in the primary air. The reduction in oxygen reduces the propensity of the coal to ignite in the pulverizers and cause fires or even explosions. The reduced oxygen in the primary air also reduces NOx formation.

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