| 摘要 |
PURPOSE:To eliminate the reduction of the heat exchanging efficiency by scraping off fine powder particles which attach and stack on the heat exchanging surface, by a method wherein scraping blade of which tip approach to the inner periphery surface of a inner tube, is fixed, and a vertically provided axis thereof is rotated in low speed. CONSTITUTION:Scraping blades 6 are fixed to protruded sustaining rods 7 of the rotating axis 3 which is provided vertically in the cylinder type inner tube 2 at the high temperature dust-containing gas flowing passage, and divided parts of the axis 3 is connected with universal joints 4. The axis 3 is rotated through the intermediary of a reduction speed driving device 8, a tork limiter 9 and a driving rotating axis 5, and scraping blades 6 approach to the inner surface of the inner tube 2 and are rotated at relatively low speed. Deposited layers which are formed of fine particles contained in gas being attached on the inner surface of the inner tube 2, are removed by the blades 6, and are flowed towards a gas output 21 floating on gas flow, and heat exchange is carried out effectively. |
