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US 4,053,408 AGranted
Method of upflow liquid treatment
AssigneeU.S. Filter Corporation
InventorTheodore H. O'Cheskey
Life of this patent
Estimating the term…
Abstract
An upflow liquid treatment method is provided with a vibrator which is used to facilitate the settling of granular solids down through a grate used to hold the solids in a static condition during the treatment cycle when liquid to be treated is passed upwardly through the bed.
Claims3
The method of removing material from a liquid comprising the steps of
- flowing liquid up through a bed of granular solids which remove the material from the liquid,
- holding the bed of granular solids static with a grate in contact with the solids until the solids are loaded with material removed from the liquid,
- flowing liquid up through the bed at rate sufficient to cause the bed to fluidize and expand above the grate, whereby at least a portion of the material loaded in the bed while it was static is removed,
- decreasing the flow of liquid up through the expanded bed to a rate which permits granular solids to settle,
- vibrating the grate and the solids as they settle to facilitate passage of solids down through the grate and increase the packing density of the solids in the bed below the grate, and
- thereafter flowing additional liquid up through the static bed to remove material from the additional liquid.
3 more elements
Dependencies are inferred from the claim text.