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1.发明授权
公开(公告)号：EP0755292B1
公开(公告)日：1998-10-14
申请号：EP94917353.8
申请日：1994-05-12
CPC分类号： B01D24/24 , B01D24/4631
摘要： An apparatus and method for gas backwashing a granular media supported upon a lateral underdrain is disclosed. The lateral underdrain includes a plurality of dispersion apertures therethrough and at least one liquid return conduit extending to a discharge at a level below the dispersion apertures. The present invention provides for equal distribution of backwash gas across the entire lateral underdrain by directing backwash gas through the dispersion apertures into the granular media and directing liquid from the granular media through the liquid return conduit without obstructing backwash gas flow through said apertures from a gas pocket formed underneath said apertures.
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2.发明公开
公开(公告)号：EP0755292A1
公开(公告)日：1997-01-29
申请号：EP94917353.0
申请日：1994-05-12
CPC分类号： B01D24/24 , B01D24/4631
摘要： An apparatus and method for gas backwashing a granular media supported upon a lateral underdrain is disclosed. The lateral underdrain includes a plurality of dispersion apertures therethrough and at least one liquid return conduit extending to a discharge at a level below the dispersion apertures. The present invention provides for equal distribution of backwash gas across the entire lateral underdrain by directing backwash gas through the dispersion apertures into the granular media and directing liquid from the granular media through the liquid return conduit without obstructing backwash gas flow through said apertures from a gas pocket formed underneath said apertures.
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