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1. 发明授权

US5554281A Traveling bridge filter system and associated underdrain 失效
标题翻译：旅行桥式过滤系统及相关缺陷
公开(公告)号：US5554281A
公开(公告)日：1996-09-10
申请号：US379112
申请日：1995-01-27
申请人： Mack D. McDougald
发明人： Mack D. McDougald
IPC分类号： B01D24/00 , B01D24/46
CPC分类号： B01D24/005
摘要： A travelling bridge filtration unit includes a tank having a bottom wall, a pair of side walls and a pair of end walls arranged to provide a rectangular tank with an open top. An interior partition in the tank extends lengthwise between the pair of end walls forms a filtrate channel between the interior partition and one of the side walls, and a filter basin between the interior partition and the other of the pair of side walls, with a bed of filter media located in the filter basin. A travelling bridge is mounted on the tank for movement therealong in a lengthwise direction, the travelling bridge supporting a backwash pump and a backwash hood for movement across the filter basin in close proximity to the filter bed. A plurality of structural underdrain headers extend between the interior partition and the other of the pair of side walls, the headers having closed ends adjacent one of the side walls, and open ends extending through the interior partition in communication with the filtrate channel. The underdrain headers each further include a plurality of apertures formed along the length thereof so that filtrate flowing down through the filter media can be discharged via the headers to the filtrate channel, and so that successive portions of the bed of filter media can be backwashed with filtrate flowing into the bed via the headers and then up through the filter media to be removed via the backwash hood.
摘要翻译：行走桥过滤单元包括具有底壁，一对侧壁和一对端壁的箱体，所述一对端壁布置成提供具有敞开顶部的矩形箱体。罐中的内部分隔件在一对端壁之间纵向延伸，在内部隔板和一个侧壁之间形成滤液通道，并且在内部隔板和一对侧壁中的另一侧之间形成过滤器槽，具有床的过滤介质位于过滤池中。行进桥安装在箱体上沿长度方向运动，行进桥支撑反冲洗泵和反冲洗罩，以便在过滤床附近移动穿过过滤池。多个结构性的浅埋集管在内部隔板和一对侧壁中的另一个之间延伸，集管具有邻近一个侧壁的封闭端，以及延伸穿过与滤液通道连通的内部隔板的开口端。下划线头还包括沿其长度形成的多个孔，使得通过过滤介质向下流过的滤液可以经由集管排出到滤液通道，并且使得过滤介质床的连续部分可以用滤液通过集管流入床中，然后通过过滤介质通过反洗罩除去。

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