| 摘要 |
<p>An agitating apparatus for a digestion tank includes a draft tube having two open ends. The draft tube is fixed in an upright direction in a digestion tank such that one open end thereof is submerged in sludge in the digestion tank. A watertight pipe is mounted in an outer wall of the digestion tank to be just above the draft tube such that the watertight pipe has an axis thereof aligned with an axis of the draft tube. An upper end of the watertight pipe protrudes outside of the outer wall of the digestion tank, a lower portion of the watertight pipe protrudes into an upper space of the digestion tank and a lower end of the watertight pipe is spaced apart from the draft tube. The agitating apparatus also includes a cover removably attached to the upper end of the watertight pipe. A watertight connection connects the draft tube and the watertight pipe to each other. An underwater agitator is inserted through the watertight pipe and is disposed in the draft tube. The underwater agitator is extractable through the watertight pipe.</p> |
