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1.发明授权Apparatus for uniformly distributing gas and/or liquid in an underdrain lateral system 失效一种用于在横向暗渠系统的气体和/或液体的均匀分配装置
公开(公告)号：EP0582007B1
公开(公告)日：1996-02-14
申请号：EP92307111.2
申请日：1992-08-04
CPC分类号： B01D24/22 , B01D24/24 , B01D24/4626 , B01D24/4631
摘要： Underdrain lateral system, which is especially adapted for use in a gravity filter bed, includes, as its preferred embodiment, scallop-shaped laterals (26, 126) having an upper, wrapped wire, slotted screen surface (28). The screen surface supports and retains the filter media particles (118) directly, without the necessity of an underlying gravel layer, and is itself supported by channel-shaped rod members (34) which are welded to the wires (30). The web portions (36) of the channel-shaped rod members perform the function of simultaneously distributing air and water during backwashing, and include a smaller total area of apertures (38) in upper channels and a larger total area of apertures (40) in lower channels to cause a plenum (56) to be formed inside the laterals which ensures that the distribution of air and water will be uniform throughout the lateral, even if the lateral is not perfectly level. Distribution of the air and water throughout all of the laterals is made even more uniform by mounting the laterals on a header (124) and providing perforated flow tubes (122) which extend from each lateral into the header to produce an additional air plenum (135) therein.
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2.发明公开Apparatus for uniformly distributing gas and/or liquid in an underdrain lateral system 失效一种用于在横向暗渠系统的气体和/或液体的均匀分布的设备。
公开(公告)号：EP0582007A1
公开(公告)日：1994-02-09
申请号：EP92307111.2
申请日：1992-08-04
CPC分类号： B01D24/22 , B01D24/24 , B01D24/4626 , B01D24/4631
摘要： Underdrain lateral system, which is especially adapted for use in a gravity filter bed, includes, as its preferred embodiment, scallop-shaped laterals (26, 126) having an upper, wrapped wire, slotted screen surface (28). The screen surface supports and retains the filter media particles (118) directly, without the necessity of an underlying gravel layer, and is itself supported by channel-shaped rod members (34) which are welded to the wires (30). The web portions (36) of the channel-shaped rod members perform the function of simultaneously distributing air and water during backwashing, and include a smaller total area of apertures (38) in upper channels and a larger total area of apertures (40) in lower channels to cause a plenum (56) to be formed inside the laterals which ensures that the distribution of air and water will be uniform throughout the lateral, even if the lateral is not perfectly level. Distribution of the air and water throughout all of the laterals is made even more uniform by mounting the laterals on a header (124) and providing perforated flow tubes (122) which extend from each lateral into the header to produce an additional air plenum (135) therein.
摘要翻译： 暗渠横向系统，这是特别适合于用在重力过滤床，包括作为其优选实施方式，扇贝形支管（26，126）在上，缠绕的线具有，开槽屏幕表面（28）。 屏幕表面支撑和保持过滤介质颗粒（118）直接地，没有底层砾石层的必要性，并且本身由焊接到导线（30）的槽形杆件（34）支撑。 通道形杆件的腹板部分（36）执行的反洗过程中同时分配的空气和水的功能，并且包括在上通道孔径（38）的较小的总面积和孔径的更大总面积（40） 下通道，以使气室（56），以确保没有空气和水的分布将是均匀的整个侧向支管的内部形成，即使横向不是完全水平。 空气和水的分布在整个所有的支管由安装在一个头（124）的支管，并提供穿孔的流管（122），其从每个横向延伸到报头中的附加空气压力通风系统，以产生变得更加均匀（135 ）在其中。
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