| 摘要 |
The invention concerns an apparatus for removing sludge accumulated on the surface of liquid from a basin, which the liquid fills and through which it flows, such as a flotation clarification basin. The apparatus (10) comprises a de-sludging chute (11), which is arranged in the basin and which functions over the entire range of level variations in the basin, or a corresponding de-sludging chute structure (11, 14), the topmost edge of which functions as a discharge edge (11a) for the sludge to be removed, and devices (12, 13) for transferring the sludge (a1, a2) from the liquid's surface (w1, w2) into the de-sludging chute (11) and further from the de-sludging chute over the discharge edge (11a) into a de-sludging basin, channel or other such and out of the clarification basin. The devices (12, 13) for transferring sludge are located in connection with the de-sludging chute (11) and they comprise an elongate, rotating shaft or a similar cylinder (12), the width of which is essentially equal to the de-sludging chute (11) and which extends in the horizontal direction and which is provided with transfer elements (13) attached to it. Under the effect of the rotating motion of the cylinder or the similar shaft (12) the transfer elements (13) will transfer along with them sludge (a1, a2) from the liquid's surface (w1, w2) and further out of the basin over the discharge edge, and in the area of the de-sludging chute (11, 14) and of the entire basin they allow height variations of the liquid level caused by different flow rates. |
