Control device for dual flow clarifiers
AssigneeFMC Corporation
InventorsJohn C. Lodholz, P. Barry Straus
Life of this patent
Estimating the term…
Abstract
A sludge removal mechanism including concentrating members for concentrating the settled sludge in localized areas on the bottom of the tank with conduits leading from the localized areas to a collection zone. A flow control device is associated with each conduit in the collection zone and a plurality of flow control devices are simultaneously moved by a drive mechanism so that the range of flow from a plurality of localized areas in a tank are changed simultaneously.
Claims15
A sludge removal mechanism for withdrawing sludge that has settled to the bottom of a tank comprising a movable concentrating means for concentrating the settled sludge in a plurality of localized areas of the tank bottom, a collection zone located above the tank bottom for receiving settled sludge, a pair of conduits leading from each localized area to said collection zone, a movable plate in said collection zone for each of said pair of conduits and movable between positions to control flow from each localized area to said collection zone, and means for simultaneously moving all of said plates between positions so that flow from a plurality of localized areas is varied simultaneously.
In a sludge removal mechanism for withdrawing sludge that has settled to the bottom of a settling tank and depositing the sludge in a collection zone located above the bottom of the tank, said mechanism including concentrating means for concentrating the settled sludge in a plurality of localized areas on the tank bottom and conduit means including at least first and second conduits leading from each localized zone to said collection zone, the improvement comprising a flow control device in said collection zone associated with each of said first and second conduits, and drive means connected to said flow control devices for simultaneously moving each of said devices with respect to an associated conduit and varying the flow from an associated localized area.
A sludge removal mechanism for withdrawing sludge that has settled to the bottom of a settling tank and depositing said sludge in a collection zone located above the bottom of the tank, said mechanism including concentrating means for concentrating settled sludge in a plurality of localized areas on the tank bottom, at least a first conduit leading from some of said localized areas to said collection zone, a first valve element associated with each of said first conduits in said collection zone, drive means for simultaneously moving said first valve elements with respect to said conduits to vary the flow through each of said first conduits, a second conduit leading from the remainder of said localized areas to said collection zone, second valve elements associated with each of said second conduits, and further drive means for simultaneously moving said second valve elements to vary the flow through said conduits.
Dependencies are inferred from the claim text.