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公开(公告)号：EP0507414A3
公开(公告)日：1993-03-24
申请号：EP92200933.7
申请日：1992-04-01
CPC分类号： B01D24/24 , B01D24/4631
摘要： A cap (18) for filter underdrain blocks (16) is provided, wherein the cap has a porous body (36) with a top surface (38), a bottom surface (40) and downwardly extending flanges (50). The cap is installed on a filter block (16) having a plurality of orifices (34) in a top wall (24) of the filter block for channelling fluids to and from an overlying filter media. The bottom surface of the cap along with the flanges define a distribution chamber above the orifices, and the cap has a porosity such that a fine grain filter media may be placed directly on the top surface of the cap without media penetrating therethrough and clogging the underdrain blocks. The distribution chamber enhances distribution of backwash fluids throughout the filter media, and the cap eliminates the need for a separate gravel support layer to be installed between the fine grain filter media and the underdrain blocks.
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公开(公告)号：EP0562182A1
公开(公告)日：1993-09-29
申请号：EP92200867.7
申请日：1992-03-26
CPC分类号： B01D24/24 , B01D24/4626 , B01D24/4631
摘要： A filter block (10) having a plurality of exterior (12,16,18) and interior (24,26,32,34) walls defining a plurality of interior chambers, (28,30,36,38,40) said chambers including at least first and second conduits (36,40) parallel to the longitudinal axis of said block, one disposed above the other, with a third conduit (38) provided to supply gas under pressure to the upper conduit; a top exterior wall of the block having a plurality of apertures (14) distributed thereover. The interior chambers comprise separate conduits for both gas and liquid backwash flows. The interior walls defining the conduits are disposed to provide even distribution of the backwashing gas and to provide bearing support for the top wall of the block.
摘要翻译： 具有多个外部（12,16,18）和内部（24,26,32,34）壁的过滤器块（10），其限定多个内部腔室（28,30,36,38,40），所述腔室 包括平行于所述块的纵向轴线的至少第一和第二管道（36,40），一个设置在另一个上方，具有第三管道（38），其被设置成将压力下的气体供应到所述上部管道; 块的顶部外壁具有分布在其上的多个孔（14）。 内部腔室包括用于气体和液体反冲洗流的独立导管。 限定导管的内壁设置成提供反冲洗气体的均匀分布并且为块体的顶壁提供轴承支撑。
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公开(公告)号：EP0507414A2
公开(公告)日：1992-10-07
申请号：EP92200933.7
申请日：1992-04-01
CPC分类号： B01D24/24 , B01D24/4631
摘要： A cap (18) for filter underdrain blocks (16) is provided, wherein the cap has a porous body (36) with a top surface (38), a bottom surface (40) and downwardly extending flanges (50). The cap is installed on a filter block (16) having a plurality of orifices (34) in a top wall (24) of the filter block for channelling fluids to and from an overlying filter media. The bottom surface of the cap along with the flanges define a distribution chamber above the orifices, and the cap has a porosity such that a fine grain filter media may be placed directly on the top surface of the cap without media penetrating therethrough and clogging the underdrain blocks. The distribution chamber enhances distribution of backwash fluids throughout the filter media, and the cap eliminates the need for a separate gravel support layer to be installed between the fine grain filter media and the underdrain blocks.
摘要翻译： 提供了用于过滤器下划线块的盖，其中该盖具有多孔体，其具有顶表面，底表面和向下延伸的凸缘。 盖子安装在过滤块的顶壁上具有多个孔的过滤块上，用于将流体引导到上层过滤介质上和从上层过滤介质流出流体。 盖的底部表面与凸缘一起在孔口上方形成分配室，并且盖具有孔隙度，使得细颗粒过滤介质可以直接放置在盖的顶表面上，而介质不穿透其中并堵塞下划线 块。 分配室增强了反冲洗流体在整个过滤介质中的分布，并且盖消除了在细粒过滤介质和下划线块之间安装单独的砾石支撑层的需要。
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