Process and apparatus for decantation of suspensions
    34.
    发明公开
    Process and apparatus for decantation of suspensions 失效
    Verfahren und Vorrichtung zum Dekantieren von Suspensionen。

    公开(公告)号:EP0422893A1

    公开(公告)日:1991-04-17

    申请号:EP90311049.2

    申请日:1990-10-09

    IPC分类号: B01D21/01 B01D21/06 B01D21/32

    摘要: A process and apparatus are useful for decanting suspensions at temperatures at and above the atmospheric boiling point of the liquid of the suspension. The apparatus is in the form of a vertically elongated vessel of high height to diameter ratio having a cylindrical upper section (10) and a bottom section (12) and arranged to be filled to a predetermined liquid level (13) in an upper region of said cylindrical section; feed means (17) for feeding a suspension into the cylindrical section in a mid-region between the bottom of the vessel and said liquid level, said feed means including means for injecting the feed under a positive pressure sufficient to overcome the hydrostatic head of the liquid in the vessel above the feed inlet; means (20) for adding a flocculant to the suspension feed; liquid outlet means (14) in an upper region of the cylindrical section at or below said liquid level for drawing off clarified liquid; solids discharge means (30) at the bottom of said vessel; means (22, 23) for controlling a slurry-clarified liquid inter­face at a predetermined level in a lower region of said cylindrical portion below the feed inlet and rotatable rake means (24) in the bottom section adapted to remold the sedimented solids and continuously expose renewed surfaces. It is particularly useful for clarifying caustic liquor containing red mud residues from the Bayer process.

    摘要翻译: 一种方法和装置可用于在悬浮液的液体的大气沸点以上的温度下倾析悬浮液。 该装置是具有高直径比的高度垂直细长的容器的形式,其具有圆柱形上部部分(10)和底部部分(12),并被布置成在上部区域中被填充到预定液位(13) 所述圆柱形部分; 进料装置(17),用于在容器的底部和所述液面之间的中间区域中将悬浮液供入到圆柱形部分中,所述进料装置包括用于在足够的正压力下喷射进料的装置,以克服容器的静压头 容器中的液体在进料口上方; 用于向悬浮饲料中添加絮凝剂的装置(20); 液体出口装置(14)在所述液面处或下方的所述圆筒形部分的上部区域中,用于抽出澄清液体; 固体排出装置(30)位于所述容器的底部; 用于在所述圆柱形部分的下部区域中的预定水平处控制浆料澄清的液体界面的装置(22,23),所述下部区域在所述进料入口下方,以及底部中的可转动的耙式装置(24),其适于重新沉积沉积的固​​体并连续暴露 更新表面。 这对于澄清含有来自拜耳法的红泥残渣的苛性液体特别有用。

    Vorrichtung zur aeroben Abwasserreinigung
    35.
    发明公开
    Vorrichtung zur aeroben Abwasserreinigung 失效
    用于无机废水净化的设备

    公开(公告)号:EP0252070A3

    公开(公告)日:1989-03-01

    申请号:EP87890153.7

    申请日:1987-07-03

    IPC分类号: C02F3/12 B01D21/06

    摘要: Bei einer Vorrichtung zur aeroben Abwasserreinigung mit einem Rundbecken und einem den Boden des Rundbeckens räumenden Rundräumer zum Austragen von Schlämmen, wobei das Belebt­schlammbecken (1) als Rundbecken mit einem Rundräumer (4) ausgebildet ist und das Nachklärbecken (2) als konzentrisch das Belebtschlammbecken (1) umgebender Ringraum ausgebildet ist und wobei der Boden (23) des Nachklärbeckens (2) höher als der Boden (25) des Belebtschlammbeckens (1) angeordnet ist und das Nachklärbecken (2) nahe seinem Boden über radiale Durchbrechungen (11) mit dem Belebtschlammbecken in Ver­bindung steht, ist auch im Nachklärbecken (2) ein Schlamm­räumer (5) angeordnet, welcher gleichachsig mit dem Schlamm­räumer (4) des Belebtschlammbeckens (1) zur Rotation antreib­bar ist.

    METHOD AND APPARATUS IN A CIRCULAR PROCESSING SPACE
    38.
    发明公开
    METHOD AND APPARATUS IN A CIRCULAR PROCESSING SPACE 审中-公开
    圆形处理空间中的方法和设备

    公开(公告)号:EP3310452A1

    公开(公告)日:2018-04-25

    申请号:EP16811080.7

    申请日:2016-05-17

    申请人: Finnchain Oy

    IPC分类号: B01D21/20 B01D21/06

    摘要: This invention relates to a method and apparatus in a circular processing space (1), such as a settling tank or a like, wherein the apparatus comprises mechanical processing means at least for guiding sludge present on a bottom of the processing space (1) out of the processing space by means of one or more bottom scrapers (2a) rotatable around a center (x) of the processing space through a bottom outlet arrangement (3) present at the bottom of the processing space, wherein the bottom scraper is coupled by its first end stationarily with an auxiliary frame (A) at the center of the processing space, wherein the bottom scraper (2a) is being moved by means of a power transmission arrangement, being in a power transmitting connection with its other end, the power transmission arrangement comprising an endless power transmission chain (5) that moves in connection with walls of the processing space (1) by influence of operating means through a drive and idle wheel arrangement (4a, 4b). The power transmission chain (5) is being moved by a power transmission arrangement that comprises at least two apart from each other placed drive wheels (4a', 4a") particularly in order to minimize strain directed to the power transmission chain (5).