| 摘要 |
PURPOSE:To carry out a uniform agitation and mixing, by pushing down a spot at the boundary between gas and liquid, where fluids tend to stagnate, caused by the rotation of a ribbon type agitating vane in an agitation vessel, by means of a scraping vane which is twisted in a direction opposite to that of an agitating vane. CONSTITUTION:When two agitating vanes 2 having a same helical shape, which are twisted in the same direction and extended downwardly along the inner wall of an agitation vessel 1, are rotated, fluids in the vessel 1 are scraped upwardly by the agitating vanes 2 along the inner wall due to the frictional resistance, while a part of said fluids rises as high as the top of the vanes 2, most of which flows toward the central portion of the vessel 1 by head difference, with a part thereof, however, stagnating there. Since scraping vanes 3 which are twisted in a direction opposite to that of the agitating vanes 2 are secured to a rotation axis 5 with the highest portions thereof positioned higher than the highest portions of the agitating vanes, the stagnating fluids are pushed down to be mixed with other fluids. |
