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US 10,434,444 B2Granted
Vacuum filter system for solid-liquid separation and process for filtering solid particles
AssigneeEnhanced Equipment LLC
InventorMohammad Hossein Baniassadi
Life of this patent
Estimating the term…
Abstract
A filter system for filtering solids includes a filtration tank for receiving a slurry containing the solids to be filtered. A filter assembly including a plurality of filter cells each having a filter medium at an exterior and a cavity at an interior is lowered into the filtration tank using a transport device carrying the filter assembly. A vacuum transfer system is connected to the filter assembly so as to transfer a vacuum to an interior of the filter cells. The vacuum transfer system is operable to perform the filtering and to retain the filtered solids while the transport device moves the filter assembly relative to the filtration tank.
Claims25
A filter system for filtering solids, the filter system comprising:
- a filtration tank for receiving a slurry containing the solids to be filtered;
- a filter assembly including a plurality of filter cells each having a filter medium at an exterior and a cavity at an interior;
- a transport device carrying the filter assembly;
- and
- a vacuum transfer system connected to the filter assembly so as to transfer a vacuum to an interior of the filter cells,
- wherein the vacuum transfer system is operable to perform the filtering and to retain the filtered solids while the transport device moves the filter assembly relative to the filtration tank, and
- wherein the vacuum transfer system is moveable with the filter assembly and includes a driven mobile pipe and a stationary pipe to transfer the vacuum to the filter cells.
4 more elements
A process of filtering solids comprising:
- moving a filter assembly into a filtration tank for receiving a slurry containing the solids to be filtered, the filter assembly including a plurality of filter cells each having a filter medium at an exterior and a cavity at an interior;
- filtering the solids;
- and
- after filtering, moving the filter assembly out of the filtration tank,
- wherein a vacuum is applied to the interior of the filter cells during the moving of the filter assembly.
2 more elements
A process for washing a filter cake comprising:
- moving a filter assembly to a first wash tank for receiving a wash liquor, the filter assembly including at least one filter cell having a filter medium at an exterior on which the filter cake is formed and a cavity at an interior, wherein a vacuum is applied to the interior of the at least one filter cell during the moving;
- and
- washing the filter cake in the first wash tank by applying the vacuum to the interior of the at least one filter cell so that the wash liquor moves through the filter cake at the exterior into the cavity.
A process for washing a filter cake comprising:
- moving a filter assembly into a first wash tank for receiving a wash liquor, the filter assembly including at least one filter cell having a filter medium at an exterior on which the filter cake is formed and a cavity at an interior;
- washing the filter cake by applying the vacuum to the interior of the at least one filter cell so that the wash liquor moves through the filter cake at the exterior into the cavity;
- and then
- after the washing, moving the filter assembly to a further wash tank and performing a second washing, wherein the wash liquor used in the first wash tank is diluted wash liquor from the further wash tank.
1 more element
A filter system for filtering solids, the filter system comprising:
- a filtration tank for receiving a slurry containing the solids to be filtered;
- a filter assembly including a plurality of filter cells each having a filter medium at an exterior and a cavity at an interior;
- a transport device carrying the filter assembly;
- and
- a vacuum transfer system connected to the filter assembly so as to transfer a vacuum to an interior of the filter cells,
- wherein the vacuum transfer system is operable to perform the filtering and to retain the filtered solids while the transport device moves the filter assembly relative to the filtration tank, and
- wherein the vacuum transfer system is connected to a liquid collector of the filter assembly via a flexible pipe, the liquid collector communicating with the interiors of the filter cells.
4 more elements
A filter system for filtering solids, the filter system comprising:
- a filtration tank for receiving a slurry containing the solids to be filtered;
- a filter assembly including a plurality of filter cells each having a filter medium at an exterior and a cavity at an interior;
- a transport device carrying the filter assembly;
- a vacuum transfer system connected to the filter assembly so as to transfer a vacuum to an interior of the filter cells;
- and
- at least first and second wash tanks for first and second wash cycles, the first wash tank being connected to a discharge pump configured to provide diluted wash liquor from the second wash tank, the second wash cycle being later than the first wash cycle,
- wherein the vacuum transfer system is operable to perform the filtering and to retain the filtered solids while the transport device moves the filter assembly relative to the filtration tank.
4 more elements
A process of filtering solids comprising:
- moving a filter assembly into a filtration tank for receiving a slurry containing the solids to be filtered, the filter assembly including a plurality of filter cells each having a filter medium at an exterior and a cavity at an interior;
- filtering the solids;
- and
- after filtering, moving the filter assembly out of the filtration tank, wherein the filter assembly is moved in a semi-continuous or continuous manner using a rotating assembly which moves from the filtration tank, to at least one wash tank, to a solids discharge location and back to the filtration tank,
- wherein a vacuum is applied to the interior of the filter cells during at least one of the filtering and the moving of the filter assembly.
2 more elements
A process of filtering solids comprising:
- moving a filter assembly into a filtration tank for receiving a slurry containing the solids to be filtered, the filter assembly including a plurality of filter cells each having a filter medium at an exterior and a cavity at an interior;
- filtering the solids;
- and
- after filtering, moving the filter assembly out of the filtration tank,
- wherein a vacuum is applied to the interior of the filter cells during at least one of the filtering and the moving of the filter assembly, wherein the filtration tank is a crystallizer, and wherein the vacuum is applied so as to facilitate growth of crystals.
2 more elements
A filter system for filtering solids, the filter system comprising:
- a filtration tank for receiving a slurry containing the solids to be filtered;
- a filter assembly including a plurality of filter cells each having a filter medium at an exterior and a cavity at an interior;
- a transport device carrying the filter assembly;
- a vacuum transfer system connected to the filter assembly so as to transfer a vacuum to an interior of the filter cells;
- a wash tank, the vacuum transfer system being continuously operable as the transport device moves the filter assembly from the filtration tank to the wash tank to retain the solids, and being operable to perform the filtering and to perform washing on the solids in the wash tank;
- and
- a vacuum separator connected to a vacuum source having at least two chambers connected to the vacuum transfer system so as to receive filtrate pulled through the filter cells during the filtering in a first chamber and diluted wash liquor pulled through the filter cells in a second chamber during the washing.
4 more elements
Dependencies are inferred from the claim text.