| 摘要 |
An apparatus for separating solids from liquids by sedimentation includes a covered tank in which a sediment-engaging raking structure is journaled for rotation about a central support pier. The raking structure is driven by a unit which travels about the periphery of the tank outside the enclosure. A gas-tight seal is effected between the tank, the cover and the drive unit by the combination of an annular liquid-holding launder which is fixedly supported to surround the interior of the tank, a rigid U-shaped member which connects the drive unit to the raking structure with its lower portion submerged in the liquid held in the launder, and a continuous baffle-like wall extending from the tank cover downwardly into the space bounded by the submerged portion of the U-shaped member.
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