| CPC F27B 7/10 (2013.01) [F27B 7/36 (2013.01); F27B 7/362 (2013.01); F27B 9/10 (2013.01); F27B 7/20 (2013.01); F27B 7/22 (2013.01); F27B 7/3205 (2013.01); F27B 2007/327 (2013.01); F27B 7/34 (2013.01); F27B 7/42 (2013.01); F27B 9/30 (2013.01); F27B 9/36 (2013.01); F27B 9/39 (2013.01)] | 12 Claims |
|
1. A rotary kiln, comprising:
a substantially hollow cylindrical heating tube;
a material feeding unit disposed on a first end of the heating tube;
a material collection unit disposed on a second end of the heating tube;
an inner cylinder supported at the second end of the heating tube with the inner cylinder being inserted in a central portion of the heating tube;
a plurality of branch tubes disposed inside the heating tube and circumferentially on an outer circumferential surface of the inner cylinder, each of the branch tubes branching from the inner cylinder and extending in an axial direction along an inner circumferential surface of the heating tube;
a hot air supply tube supported to be relatively rotatable with respect to the inner cylinder with the hot air supply tube being inserted in one end of the inner cylinder that extends outside the heating tube;
a drive mechanism rotating the heating tube; and
an exhaust duct being disposed outside a part of the heating tube on the first end and covering an outlet of each of the branch tubes,
wherein the branch tubes extend outside the heating tube from the part of the heating tube on the first end.
|