Distribution and collection headers for a filter bed
OwnerDerek Colin Tolley, Asheley Derek Tolleyinventors
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Abstract
A filtration vessel has an inlet for inflow into the filtration vessel of liquid media to be filtered, a body of filter media in the filtration vessel, and a drain to receive filtered liquid media for take off from the filtration vessel. The inlet is configured to induce rotating flow about the vessel of unfiltered liquid present in the vessel; and/or, the drain is configured in backwash mode to force backwash liquid through the filter media in rotating flow about the vessel; and/or the drain includes drain limbs inclined to the horizontal and providing for draining of filtered liquid along the inclined limbs to outlet.
Claims18
A filtration apparatus for filtering liquid Including:
- a filtration vessel;
- an inlet arrangement in an upper portion of the filtration vessel for introducing liquid to be filtered into the filtration vessel, the inlet arrangement comprising a plurality of radially extending duct arms, each arm including outlet means to direct pressurized liquid downwardly and in a direction transverse to the arm, resulting in a helical downward flow;
- a body of filter media in the filtration vessel;
- and
- a drain arrangement to receive filtered liquid and remove it from the filtration vessel.
Dependencies are inferred from the claim text.