Blowing a gas into a granular filter bed
AssigneeNordic Water Products AB
InventorKurt Jonsson
Life of this patent
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Abstract
A gas is blown into a filter (1) having a granular filter bed such that the gas flows into the bed along at least one elongate free edge disposed in the bed.
Claims12
A method of blowing gas into a granular filter bed of a continuously operating filtering apparatus which comprises providing at a bottom end of the filter bed an enclosure having an open bottom and an elongate bottom edge and directing the gas outwardly from said enclosure over the length of said edge and upwardly through the bed.
Apparatus for blowing a gas into a granular filter bed of a continuously operating filter apparatus comprising an elongate hood arranged in a bottom end of the filter bed, the hood being closed upwardly and open downwardly, such as to form an elongate lower inflow edge for the gas, said edge being disposed substantially horizontally in the filter bed during operation of the filter apparatus and means for introducing gas into said hood for flow over said edge and upwardly through the filter bed.
Dependencies are inferred from the claim text.