초록 ▼

A sludge filtration system for separating the sludge liquids from the sludge solids. A container provides a basin for receiving and holding the sludge. Within the container, a first filter assembly, positioned proximal the container bottom, defines a first filtrate cavity. The first filter assembly

A sludge filtration system for separating the sludge liquids from the sludge solids. A container provides a basin for receiving and holding the sludge. Within the container, a first filter assembly, positioned proximal the container bottom, defines a first filtrate cavity. The first filter assembly is maintained below the sludge level so that a pump, in flow communication with the first filtrate cavity, provides for vacuum evacuation of the first filtrate cavity. Placing a valve in the first filtrate discharge conduit facilitates selective vacuum evacuation or gravitational evacuation of the first filtrate cavity. A second filter assembly extends about the inside perimeter of the container cavity proximal the container side walls. In addition, the second filter assembly extends from proximal the container bottom to the container top end. The second filter assembly defines a second filtrate cavity. A second filtrate discharge conduit provides for gravitational evacuation of the second filtrate cavity. Providing a valve in the second filtrate discharge conduit and providing a second pump in flow communication therewith facilitates selective vacuum evacuation or gravitational evacuation of the second filtrate cavity. Functionally applying the aforementioned apparatus having a sludge therein provides a method of dewatering sludge.

대표청구항 ▼

A sludge filtration system comprising: a container having container side walls and a bottom constructed to receive and maintain a sludge therein; at least one first filter assembly positioned in said container; said at least one first filter assembly defining a first filtrate cavity bounded by said

A sludge filtration system comprising: a container having container side walls and a bottom constructed to receive and maintain a sludge therein; at least one first filter assembly positioned in said container; said at least one first filter assembly defining a first filtrate cavity bounded by said first filter assembly, said container side walls, said container bottom and a lower surface of a separator plate; said at least one first filter assembly constructed and positioned to be maintained below said sludge when said container contains said sludge therein; thereby facilitating maintenance of a differential pressure that is lower than the atmospheric pressure in said first filtrate cavity; a first pump means for creating a differential pressure that is lower than the atmospheric pressure in said first filtrate cavity and evacuating filtrate from said first filtrate cavity; at least one first filtrate discharge conduit providing flow communication between said first filtrate cavity and said first pump means; at least one second filter assembly positioned in said container; said at least one second filter assembly defining a second filtrate cavity bounded by said at least one second filter assembly, said container side walls, and an upper surface of said separator plate, wherein said separator plate sealingly separates said first filtrate cavity from said second filtrate cavity; and at least one second filtrate discharge conduit positioned and constructed to provide for gravitational evacuation of filtrate from said second filtrate cavity.