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    • 9. 发明公开
    • THREE ZONE DISSOLVED AIR FLOTATION CLARIFIER WITH IMPROVED EFFICIENCY
    • DREIZONENVORRICHTUNG ZUR REINIGUNG DURCH FLOTATION MITGELÖSTERLUFT MIT VERBESSERTEM WIRKUNGSGRAD
    • EP0971856A4
    • 2000-01-26
    • EP97924519
    • 1997-04-25
    • LENOX WATER TECH INST
    • KROFTA MILOS
    • B01D17/02B01D21/00B03D1/14C02F1/24C02F1/52B01D17/035B01D21/08C02F9/00
    • B03D1/1431B01D17/0205B01D21/0027B01D21/0039B01D21/0045B01D21/01B01D21/08B01D21/20B01D21/2405B01D21/2427B01D21/2433B01D21/2444B01D21/2488B01D21/34B03D1/028B03D1/1462B03D1/1481B03D1/1487C02F1/24C02F1/52C02F2301/08
    • A compact dissolved-air-flotation (DAF) clarifier and clarification process utilize three zones for clarification which operate in sequence in a single clarifier. Raw water with suspended solids enters a flocculator at the center of an annular tank where microscopic air bubbles introduced to the inflow float flocked contaminants to form a floating sludge layer. A first clarification, calming and degassing occur here. The water then flows radially outwardly into the tank where further quiet clarification occurs. A third level of clarification occurs in a lower portion of the tank, specifically, in a set of plate-like lamellae, radial and conical, which form inclined channels where a final clarification occurs. The bottom wall of the tank has a set of apertures which allow a gravity flow of clarified water through a layer of pressurized gas to an underlying collection compartment. Level sensors control a valve in the clarified outflow line and an air bleed from the pressurized gas layer to regulate liquid levels in the clarifier. A set of rotating paddles push the sludge layer up a ramp to an inclined discharge conduit. Alternatively, a suction head with a mechanical skimmer sweeps around the tank to draw the sludge through a central hollow pipe to a discharge conduit. An offset drive operating through a belt rotates the sludge removal mechanism and the lamellae.
    • 紧凑型溶气气浮(DAF)澄清器(10,10')和澄清过程利用三个区域进行澄清,其在单个澄清池(I,II,III)中依次操作。 带有悬浮固体污染物的原水在环形罐(16)的中心进入絮凝器(14),在该环形罐(16)中引入引入流入浮体的微小气泡,使污染物形成漂浮污泥层(12)。 首先澄清(I),平静和脱气发生在这里。 然后水径向向外流入罐(16)中,在那里发生进一步的静音澄清(II)。 澄清的第三级(III)发生在罐的下部(16b)中,具体地在一组板状薄片(18),径向(18a)和圆锥形(18b)中,其形成倾斜通道(52 )发生最终澄清的地方。 罐的底壁(16c)具有一组孔(54),其允许澄清水(40)通过加压气体层(44)的重力流动到下面的收集隔室(38)。 液位传感器(100,124)控制澄清的流出管线(24)中的阀(42)和来自加压气体层的空气排出以调节澄清器中的液位。 一组旋转叶片(78)将污泥层(12)向上推动斜坡(81)到倾斜的排放导管(82)。 或者,带有机械撇渣器(84b)的抽吸头(84)扫掠罐周围以通过中央中空管(89)将污泥抽到排出管道(82')。 通过皮带(64)操作的偏移驱动器(56)使污泥移除机构(58,58')和薄片(18)旋转。