| 摘要 |
PURPOSE: An exhaust gas flow pipe having a means for preventing powder adhesion is provided to improve a preventive efficiency and an energy efficiency with a simplified structure. CONSTITUTION: The pipe(11a,11b,11c), used for leading an exhaust gas to a gas disposal unit(7), has a spring(13a,13b,13c) connected to and rotated by a motor(17a,17b,17c,17d). The outer diameter of the spring is nearly the same as the inner diameter of the pipe. Therefore, by generating a mechanical friction between the spring and the pipe, it can be prevented that powder in the exhaust gas adheres to the pipe. An empty elbow box(15a,15b) may be equipped at a joint between the pipes, and a heating coil may be additionally and locally formed at a difficult place, such as a valve or a gas outlet(19), to equip the spring. Further, the preventive means composed of the spring and the motor may be used only near a connecting place(21) with the gas disposal unit(7).
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