Apparatus for securing underdrain filter block

    公开(公告)号:US10112128B2

    公开(公告)日:2018-10-30

    申请号:US14722553

    申请日:2015-05-27

    Abstract: An underdrain filter block for use in draining and backwashing a filtering media in a filter bed including a top wall, a pair of side walls extending from the top wall, a bottom wall extending between the pair of side walls, and a transverse wall extending from one of the pair of side walls to the other of the pair of side walls. The top wall, the pair of side walls, and the bottom wall define an upper portion and a lower portion. The lower portion includes a grout chamber positioned between the bottom wall and the transverse wall and at least one of the bottom wall and said side walls contains an opening.

    DUAL PARALLEL LATERAL WITH INTERNAL AIR DISTRIBUTION PIPE
    6.
    发明申请
    DUAL PARALLEL LATERAL WITH INTERNAL AIR DISTRIBUTION PIPE 审中-公开
    内置空气分配管双向平行

    公开(公告)号:US20150014259A1

    公开(公告)日:2015-01-15

    申请号:US14376866

    申请日:2013-02-06

    CPC classification number: B01D24/4631 B01D24/24

    Abstract: A dual parallel underdrain lateral for use in a filtration system having a filtration media includes a primary conduit extending along the underdrain lateral, which has a plurality of metering orifices for providing gas and liquid thereby; a secondary conduit, where the secondary conduit has a plurality of dispersion apertures in an upper side thereof to deliver the gas and liquid from the secondary conduit to the filtration media; and at least one gas conduit extending along the underdrain lateral, where the at least one gas conduit is connected to a gas source and is configured to provide the gas from the gas source directly to the primary conduit, or the secondary conduit, or any combination thereof.

    Abstract translation: 用于具有过滤介质的过滤系统中的双平行缺口侧面包括沿着下划线侧向延伸的主导管,其具有用于提供气体和液体的多个计量孔; 次级导管,其中次级导管在其上侧具有多个分散孔,以将气体和液体从次级导管输送到过滤介质; 以及至少一个气体导管,其沿着下划线侧向延伸,其中所述至少一个气体导管连接到气体源,并且构造成将气体从气体源直接提供到主导管或次要导管,或任何组合 其中。

    Multiple rate filter underdrain lateral gas metering plate

    公开(公告)号:US10913014B2

    公开(公告)日:2021-02-09

    申请号:US15061023

    申请日:2016-03-04

    Abstract: A filtration system has at least one underdrain lateral, a flume, and at least one metering plate. The metering plate includes a plate member with at least one opening configured to receive liquid or gas therethrough at a first flow rate during a backwash function and is configured to receive liquid or gas therethrough at a second, lower flow rate during filtration. A method of metering gas into a filtration system with a metering plate is also disclosed. The metering plate allows gas to flow into each underdrain lateral at two very different flow rates.

    Grout bridge for filter underdrain blocks

    公开(公告)号:US10478757B2

    公开(公告)日:2019-11-19

    申请号:US15485862

    申请日:2017-04-12

    Abstract: A filtration system includes a plurality of underdrain blocks arranged in a side-by-side configuration so as to define a gap therebetween, the gap configured to receive grout. Each underdrain block includes a top wall, a bottom wall, and a plurality of side walls connecting the top wall and the bottom wall. A grout bridge is arranged in the gap between adjacent underdrain blocks so as to form a grout seal between the grout bridge and adjacent side walls of the adjacent underdrain blocks. The adjacent sidewalls each include a rib, each rib defining a slot. The grout bridge is arranged in adjacent slots of the adjacent sidewalls of the adjacent underdrain blocks. A method of arranging a filtration system and a grout bridge are also disclosed.

    Gas-liquid distribution technique for water or wastewater filters using underdrains

    公开(公告)号:US10022654B2

    公开(公告)日:2018-07-17

    申请号:US14107843

    申请日:2013-12-16

    Abstract: A method of distributing gas and liquid through an underdrain system includes: a) positioning an underdrain system on a filter floor, the underdrain system comprising at least one underdrain block and filter media positioned on top of the underdrain block; b) distributing gas sufficiently evenly through the underdrain system at a rate of less than 2 scfm/ft2 by distributing a liquid at a rate of less than 2 gpm/ft2 concurrently with the gas; c) increasing the distribution rate of the liquid, or increasing the distribution rate of the liquid and the distribution rate of the gas; d) stopping the distribution of gas; e) further increasing the distribution rate of the liquid; and f) decreasing the distribution rate of the liquid. A method of distributing gas and liquid during an upflow filtration mode is also included.

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