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    Method and apparatus for dewatering thickened sludge
    221.
    发明授权
    Method and apparatus for dewatering thickened sludge 失效
    脱水增稠污泥的方法和装置

    公开(公告)号：US4092247A

    公开(公告)日：1978-05-30

    申请号：US753100

    申请日：1976-12-21

    Applicant: Rud Frik Madsen

    Inventor： Rud Frik Madsen

    IPC: B01D33/15 ,  B01D25/12 ,  B01D33/09 ,  B01D33/13 ,  B01D33/23 ,  B01D33/27 ,  B30B9/04 ,  B30B9/08 ,  C02F11/12 ,  C13B15/00 ,  B01D33/22 ,  C02C1/18

    CPC classification number: B30B9/042 ,  B01D25/12 ,  B01D33/23 ,  B30B9/04 ,  B01D2201/282

    Abstract: Process for dewatering thickened sludge comprising the steps of depositing thickened sludge onto a porous support, partially dewatering the thickened sludge by establishing a vacuum within said porous support, compressing the partially dewatered sludge on said porous support at a pressure of from 1 to 10 kp/cm.sup.2 to further dewater the sludge and to form a sludge cake, compressing the sludge cake on the porous support at a pressure of from 10 to 300 kp/cm.sup.2 to further dewater the sludge cake and discharging the dewatered sludge cake from the porous support.

    Abstract translation: 用于脱水增稠污泥的方法包括以下步骤：将增稠的污泥沉积到多孔载体上，通过在所述多孔载体内建立真空部分地使所述增稠污泥脱水，在所述多孔载体上以1至10kp / cm2，以进一步使污泥脱水并形成污泥饼，在10-300kp / cm2的压力下压缩多孔载体上的污泥饼，以进一步使污泥饼脱水并从多孔载体排出脱水的污泥饼。

    Microscreen drum
    223.
    发明授权
    Microscreen drum 失效
    MICROSCREEN DRUM

    公开(公告)号：US4038187A

    公开(公告)日：1977-07-26

    申请号：US654811

    申请日：1976-02-03

    Applicant: Edward P. Saffran

    Inventor： Edward P. Saffran

    IPC: B01D33/06 ,  B01D33/067

    CPC classification number: B01D33/067 ,  B01D2201/282

    Abstract: The specification discloses an improvement in rotary drum screens for the filtration of liquids which comprise (a) a drum having a central horizontal axis and a radially outer surface, (b) a plurality of microscreen grids mounted on the radially outer surface of the drum, each of the microscreen grids comprising a screen which is divided into a large number of small cells by walls which extend radially with respect to the drum, (c) means for introducing the liquid to be filtered into the interior of the drum, (d) means for rotating the drum about its central axis, (e) a backwash header mounted outside the radially outer surface of the drum, and (f) a backwash receiving trough mounted within the drum for collecting filtrate accumulated on the screen. The liquid to be filtered is introduced into the drum at one end thereof, and the drum is supported so that it is partially submerged in the filtered liquid. The improvement resides in the fact that at least some of the walls which divide the microscreen grids into cells are at least generally parallel to the central axis of the drum and extend radially outwardly from the microscreen a distance sufficient so that, during use of the rotary drum screen to filter a given liquid, the said walls retain an amount of the liquid which just has time to drain through the microscreen between the time each cell emerges from the filtered liquid and the time it arrives underneath the backwash header.

    Filter, especially for back water
    224.
    发明授权
    Filter, especially for back water 失效
    过滤，特别是回水

    公开(公告)号：US3972817A

    公开(公告)日：1976-08-03

    申请号：US584926

    申请日：1975-06-09

    Applicant: Per Jacob Moe

    Inventor： Per Jacob Moe

    IPC: B01D33/073 ,  B01D33/00 ,  B01D35/16

    CPC classification number: B01D33/073 ,  B01D2201/282

    Abstract: A filter comprising a vessel in the form of a closed drum which is rotatably mounted about a horizontal central axis, and a plurality of longitudinal, hollow, horizontal filter elements which are arranged in a ring. The filter elements extend between and are connected to the end walls of the drum for rotation about the central axis together with the drum. The peripheral surfaces of the filter elements constitute a filter surface which, upon rotation of the drum and the elements, will submerge into and emerge from the liquid to be filtered which is contained in the drum. At one end the filter elements extend through the end wall of the drum, and this end of the filter elements is open to permit unobstructed discharge of the filtrate. A blow tube with nozzle means is provided within each filter element, with the blow tube serving to remove solids deposited on the filter surface when the surface is above the liquid level in the vessel. Each filter element is rotatably mounted in the end walls of the drum, and means are provided for rotating the filter element about its longitudinal axis during the period in which the filter element is above the liquid level in the drum. A stationary through the upwardly facing opening of which lies above the liquid level, is positioned above the uppermost portion of the orbit of the filter elements for collecting and removing the solids detached from the filter surface.

    Abstract translation: 一种过滤器，其包括围绕水平中心轴线可旋转地安装的封闭鼓形式的容器和布置在环中的多个纵向，中空的水平过滤器元件。 过滤元件在滚筒的端壁之间延伸并且连接到滚筒的端壁，用于围绕中心轴线与滚筒一起旋转。 过滤元件的周边表面构成过滤器表面，该过滤器表面在滚筒和元件旋转时将浸没在容纳在滚筒中的待过滤液体中并从其中排出。 在一端，过滤器元件延伸穿过滚筒的端壁，并且过滤元件的这一端是敞开的，以允许滤液不受阻碍地排出。 在每个过滤器元件内设有带有喷嘴装置的吹管，当表面高于容器中的液位时，吹气管用于去除沉积在过滤器表面上的固体。 每个过滤器元件可旋转地安装在滚筒的端壁中，并且提供装置用于在过滤元件高于滚筒中的液面高度的时段期间围绕其纵向轴线旋转过滤元件。 通过其面向上的开口位于液面上方的固定件位于过滤器元件的轨道的最上部分上方，用于收集和移除与过滤器表面分离的固体。

    Fluid filtration and sampling
    225.
    发明授权
    Fluid filtration and sampling 失效
    流体过滤和采样

    公开(公告)号：US3926804A

    公开(公告)日：1975-12-16

    申请号：US51251574

    申请日：1974-10-07

    Applicant: PRO TECH INC

    Inventor： MCCLURE CHARLES LAIRD

    IPC: B01D29/11 ,  B01D33/06

    CPC classification number: B01D29/114 ,  B01D29/682 ,  B01D2201/282

    Abstract: Continuously self-cleaning fluid filtration is provided, especially for use in systems of fluid sampling wherein recirculation of part of the fluid filtered thereby is bypassed back through in the reverse direction to clean it. The filter has a foraminous housing that also has end ports to the exterior and has rotatable internal baffling dividing the interior into compartments communicating with the respective ports.

    Vacuum filter
    226.
    发明授权
    Vacuum filter 失效
    真空过滤器

    公开(公告)号：US3890235A

    公开(公告)日：1975-06-17

    申请号：US49065174

    申请日：1974-07-22

    Applicant: ENVIROTECH CORP

    Inventor： DAVIS STEVEN S

    IPC: B01D33/27 ,  B01D33/34

    CPC classification number: B01D33/27 ,  B01D33/48 ,  B01D33/52 ,  B01D2201/02 ,  B01D2201/282

    Abstract: An open frame rotary cylindrical filter construction is disclosed in which the rotary element is formed from a plurality of individual concave filter sectors mounted radially about a central hub. Each sector includes an elongated cone shaped basket or cup having an open mouth at its outer or base end and a restricted outlet opening inwardly from its apex. A flange is formed about the mouth of the sector and the sectors are held in place by tie rods extending radially from the hub to engage the flanges to pull the sectors toward the hub. The apex of each sector is pulled into sealing relationship with a drainage conduit leading to a filter valve at one end of the structure. The flanges of adjacent sectors combine to form a cylindrical structure supported by the tie rods and drainage conduits. Usual trunnions are provided at each end for journalling the structure for rotation.

    Abstract translation: 公开了一种开放式框架旋转圆柱形过滤器结构，其中旋转元件由围绕中心毂径向安装的多个单独的凹形过滤器部分形成。 每个扇区包括细长的锥形篮或杯，其在其外部或底端具有开口，并且从其顶点向内开口有限制的出口。 在扇形物的嘴部周围形成凸缘，并且通过从轮毂径向延伸的拉杆将部分保持就位，以接合凸缘以将扇区拉向毂。 每个扇区的顶点与排水管道被拉入密封关系，排水管道通向结构一端的过滤阀。 相邻扇区的凸缘组合形成由拉杆和排水管支撑的圆柱形结构。 通常的耳轴在每端提供用于旋转的结构。

    Filter elements for continuous filters
    227.
    发明授权
    Filter elements for continuous filters 失效
    连续过滤器的过滤器元件

    公开(公告)号：US3825124A

    公开(公告)日：1974-07-23

    申请号：US27551370

    申请日：1970-07-27

    Applicant: ENVIROTECH CORP

    Inventor： DAVIS S

    IPC: B01D33/27 ,  B01D33/34 ,  B01D33/02

    CPC classification number: B01D33/27 ,  B01D33/48 ,  B01D33/52 ,  B01D2201/02 ,  B01D2201/282

    Abstract: A plurality of concave filtering elements are fixed about the periphery of a rotary filter drum so that the mouths of the elements are open and the closed ends of the elements are directed substantially radially inward of the drum. As the drum rotates in submergence in a slurry, solids are collected in the elements by applying suction to the elements to draw the liquid therethrough; to discharge the collected solids, the elements are everted by reversing the pressure thereon.

    Noncellular rotary vacuum filter
    228.
    发明授权
    Noncellular rotary vacuum filter 失效
    非旋转式真空过滤器

    公开(公告)号：US3638797A

    公开(公告)日：1972-02-01

    申请号：US3638797D

    申请日：1970-04-23

    Applicant: KLOECKNER HUMBOLDT DEUTZ AG

    Inventor： HECKMANN WOLFGANG

    IPC: B01D33/073 ,  B01D33/06

    CPC classification number: B01D33/073 ,  B01D33/466 ,  B01D33/50 ,  B01D2201/282

    Abstract: A noncellular vacuum filter is provided in its interior with a blast chamber supplied with compressed air which is used for removing the filter cake from the outer circumference of a cylindrical filter drum. The blast chamber is formed by two telescoping sealing frames, both of which carry each a continuous flexible sealing bar extending all around the frames and which are adapted to engage the inner wall of the filter drum when the frames are radially moved outwardly by eccentrics on an eccentric shaft mounted in bearings carried by a baseplate closing the outer sealing frame opposite the side which has said sealing bar mounted thereon. A slot in the upper portion of the sealing bar attached to the inner sealing frame is in communication with apertures in said inner sealing frame so that compressed air from the blasting chamber is jetlike discharged and directed through the wall of the filter drum to remove the filter cake from the outer face of said drum.

    Abstract translation: 在其内部提供非细胞真空过滤器，其中提供有用于从圆筒形过滤鼓的外圆周去除滤饼的压缩空气的鼓风室。 鼓风室由两个可伸缩的密封框架形成，两个可伸缩的密封框架两者都带有一个连续的柔性密封条，其全部围绕框架延伸，并且当框架通过偏心件向外径向移动时适于与过滤鼓的内壁接合 偏心轴安装在由底板承载的轴承中，该基板封闭与安装有所述密封条的侧面相对的外部密封框架。 安装在内密封框架上的密封条的上部的槽口与所述内部密封框架中的孔连通，使得来自喷射室的压缩空气被喷射状排出并引导通过过滤鼓的壁以移除过滤器 从所述鼓的外表面的蛋糕。

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