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US 10,729,994 B2Granted
Rotary disc filter
AssigneeVeolia Water Solutions & Technologies Support
InventorsEmil Svensson, Kjell-Ake Svensson, Per Larsson
Life of this patent
Estimating the term…
Abstract
A disc filter includes a filtrate holding tank disposed below a series of disc-shaped filter members supported on a drum. Filtrate from the holding tank is used to backwash filter media on the disc-shaped filter members. Filtrate is discharged from the holding tank via a filtrate conduit. Bypass water is directed through a bypass conduit in the disc filter and mixed with the filtrate downstream of the filtrate holding tank. This assures that the filtrate used to backwash the filter media does not include bypass water.
Claims22
A rotary disc filter for filtering water and removing suspended solids from the water, comprising:
- a. a rotary drum for receiving water and having a plurality of openings for permitting the water to flow from the drum;
- b. an inlet for directing water into the drum;
- c. a drive for rotatively driving the rotary drum;
- d. a series of disc-shaped filter members secured around the drum for receiving water from the drum;
- e. filter media disposed on opposite sides of each disc-shaped filter member for filtering the water as the water flows from the disc-shaped filter members outwardly through the filter media to yield filtered water;
- f. a filtered water holding chamber disposed adjacent the disc-shaped filter members for receiving and holding the filtered water;
- g. a backwash system, including a pump, for pumping filtered water from the filtered water holding chamber to a series of nozzles disposed adjacent the filter media for backwashing the filter media;
- h. a filtered water conduit fluidly connected to the filtered water holding chamber and configured to receive filtered water from the filtered water holding chamber;
- i. a bypass conduit disposed on an inlet end portion of the disc filter and configured to receive bypass water that bypasses the disc-shaped filter members and configured to channel the bypass water through a portion of the disc filter;
- and
- j. wherein the bypass conduit is fluidly connected to the filtered water conduit and wherein the bypass conduit and the filtered water conduit are configured to-mix the bypass water and the filtered water prior to the filtered water and bypass water being discharged from the disc filter.
8 more elements
A rotary disc filter for removing suspended solids from water comprising:
- a. a rotary drum for receiving the water and having a plurality of openings for permitting the water to flow from the drum;
- b. a drive for rotatively driving the rotary drum;
- c. a series of disc-shaped filter members secured around the drum for receiving water from the drum;
- d. filter media disposed on opposite sides of each disc-shaped filter member for filtering the water as the water flows from the disc-shaped filter members outwardly through the filter media to yield filtered water;
- e. a filtered water holding, chamber disposed adjacent the disc-shaped filter members for receiving and holding the filtered water;
- f. a backwash system including a pump and a series of nozzles disposed adjacent the filter media for backwashing the filter media;
- g. the disc filter including an inlet end portion and a back end portion;
- h. an inlet disposed on the inlet end portion of the disc filter for directing the water into the drum;
- i. a filtered water outlet disposed on the inlet end portion of the disc filter and fluidly connected to the filtered water holding chamber and configured to discharge filtered water from the inlet end portion of the disc filter such that the water enters the inlet end portion of the disc filter and the filtered water is discharged from the inlet end portion of the disc filter;
- and
- j. a bypass conduit disposed on the inlet end portion of the disc filter.
8 more elements
A rotary disc filter for filtering water and removing suspended solids from the water, comprising:
- a. a rotary drum for receiving water and having a plurality of openings for permitting the water to flow from the drum;
- b. an inlet for directing water into the drum;
- c. a drive for rotatively driving the rotary drum;
- d. a series of disc-shaped filter members secured around the drum for receiving water from the drum;
- e. filter media disposed on opposite sides of each disc-shaped filter member for filtering the water as the water flows from the disc-shaped filter members outwardly through the filter media to yield filtered water;
- f. a filtered water holding chamber disposed adjacent the disc-shaped filter members for receiving and holding the filtered water;
- g. a backwash system, including a pump, for pumping filtered water from the filtered water holding chamber to a series of nozzles disposed adjacent the filter media for backwashing the filter media;
- and
- h. means disposed on the disc filter and exteriorly of the filtered water holding chamber for receiving filtered water from the filtered water holding chamber and for receiving bypass water that bypasses the disc-shaped filter members and mixing the bypass water with the filtered water on the disc filter to form a mixture of filtered water and bypass water and discharging the mixture from the disc filter.
6 more elements
Dependencies are inferred from the claim text.