| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently form a circulating flow within an entire oxidation ditch tank and successfully perform aeration, in the oxidation ditch tank having a vertical shaft type aeration stirring device. <P>SOLUTION: A baffle plate 13 is disposed on the upstream side of an impeller 11 arranged in a linear water passage 23, and a stirring flow C2 flowing toward the upstream side by rotation of the impeller 11 is guided to the downstream side by the baffle plate 13. Passage portions 14 are installed on the upper side of the baffle plate 13 so as to make water C3 scattering by the rotation of the impeller 11 and flowing toward the upstream side pass through the passage portions 14. Straightening vanes 15A are installed on the baffle plate 13 to oppose to the passage portions 14. The water C3 passed through the passage portions 14 is straightened along the outer peripheral face of the baffle plate 13 and along the rotating direction of the impeller 11 while collided with the straightening vanes 15A. While the water C3 passes through the passage portions 14 and is straightened by the straightening vanes 15A, sufficient air is taken in to the water C3. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
