Externally heated rotary kiln

摘要

PROBLEM TO BE SOLVED: To provide an external heating rotary kiln capable of stably operating for a long time when carrying out a dry distillation process of an object to be heated containing a massive amount of high polymer organic matter.;SOLUTION: The external heating rotary kiln is composed of a shell rotating around an axis having a supply port of the object to be heated in one end side and a delivery opening for delivering the object in another end side, a heating furnace heating an outer side part of the shell, an exhaust tube fixed by piercing a circumferential wall of the shell and exhausting gas generated in the shell into the heating furnace, and an peeling body interlocking with rotation of the shell in the exhaust tube to peel deposits adhered to an inner face of the exhaust tube. The exhaust tube has in its both ends stoppers with bleeders holding the peeling body in the exhaust tube. The peeling body can coaxially rotate/move with the exhaust tube housing it, and it is formed by a hollow body having vent holes coaxial with the exhaust tube and ventilating dry distillation gas.;COPYRIGHT: (C)2004,JPO