F - Mech Eng,Light,Heat,Weapons – 23 – K
Patent
F - Mech Eng,Light,Heat,Weapons
23
K
F23K 3/02 (2006.01) F23C 7/00 (2006.01) F23D 17/00 (2006.01)
Patent
CA 2066376
Burner for a rotary kiln. ABSTRACT A burner for a rotary kiln consists of a central pipe (5) for introducing an oil or gas lance, a first concentric pipe (8) for introducing primary air and a second concentric pipe (1) for introducing a mixture of solid fuel and carrier air into the burning zone of the kiln. The pipes (5, 8 and 1) form mutually annular channels, the primary air channel being located inside the solid fuel/air channel and at its end facing the burning zone being provided with nozzles mounted parallel to the axis of the burner, the primary air streams from the nozzles drawing the particles of solid fuel towards the core of the flame in the burning zone to increase the combustion and to reduce the NOx-content in the kiln exhaust gases. The burner is provided with a heat exchanger (14, 18 and 20) surrounding the portion of the burner projecting into the kiln to cool the burner and to increase the primary air velocity during injection into the burning zone.
Borden Ladner Gervais Llp
F.l. Smidth & Co. A/s
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