Abstract:
In a filtration equipment with a filtrate recovery process, in order to achieve reduction in recovery time of suspension in a tank and allow sludge such as filtration aid to be exfoliated readily from filtration elements and discharged, pressurized water is introduced into the tank which includes tubular filtration elements and a plate element provided at upper and lower locations thereof to recover the suspension as filtrate, and pressurized gas such as air or carbon dioxide is introduced into the tank from the suspension side so that water remaining on the suspension side is discharged from the tank by the pressurized gas, whereafter sludge is exfoliated from the filtration elements and then discharged to the outside of the tank.
Abstract:
A filter apparatus and coating method particularly adapted for thixotropic coating solutions and which yet permits the dead space within the housing of the filter apparatus for the secondary region to be reduced under a broad range of conditions at all times. The improved filter apparatus has a filter provided within a housing in such a way that it divides the interior of the housing into a primary region into which a coating to be filtered is supplied and a secondary region which receives the coating solution after it is filtered. The apparatus filters the coating solution just before it is coated on a flexible base. The apparatus is characterized in that the housing for the secondary region is designed in such a way that an index for measurement of the dead space within the housing satisfies the relation T/.tau.> 0.95, where .tau. is an experimentally determined dimensionless number for the indicial response time of the housing and T is a dimensionless number of theoretical time.
Abstract:
An improved triangular filter cartridge and apparatus is provided comprising a generally cylindrical vessel having a plurality of generally triangularly shaped filter cartridges disposed therein. Each triangular filter cartridge has one of its substantially flat sides slightly spaced apart from and in direct facing relationship with the inner surface of the vessel, whereby a greater number of triangular filter cartridges can be compactly disposed within said vessel to increase the filtration capacity thereof. Each filter cartridge includes a passage that is triangularly shaped in a plane perpendicular to the axial direction.
Abstract:
A filter system includes a plurality of filter assemblies coupled to a common receiving chamber. Each filter assembly is arranged so that filtered water can flow into the receiving chamber under the influence of gravity and pressure from the difference in water level on the outside of the filter assemblies and the water level within the receiving chamber as maintained by a drain or pump within the chamber. Each filter assembly includes an upright intake tube having inlet openings spaced vertically along the intake tube. A filter housing surrounds each intake tube and is spaced from the intake tube by a distance sufficient to receive a filter element between the intake tube and the housing. A cap secures the top of the filter assembly so that all water passing into one of the inlet tube openings must have first passed through the housing and the filter element. Blocking devices are used to change one filter element while the filter system continues to operate via the other filter assemblies.
Abstract:
A system for removing material from a flowing liquid, where the system includes one or more cartridges, where each cartridge has an outer permeable wall and an inner permeable wall that form a media region between the walls, where a media is disposed within at least part of the media region to remove at least a portion of the material from the flowing liquid, the cartridge also having an inner cartridge lumen in communication with the inner permeable wall, and a cartridge outlet in communication with the inner cartridge lumen; a cartridge chamber having a treatment region that houses the one or more cartridges, where the cartridge chamber also includes a chamber inlet to accept the flowing liquid, and a chamber outlet to discharge treated liquid; and an actuatable valve positioned outside the one or more cartridges, where the valve controls a flow rate of the flowing liquid within the treatment region by actuating in response to a change in a level of the liquid in the treatment region.
Abstract:
Apparatus in fluid communication with a water leg portion of a hydrocarbon-contaminated water, e.g., a water leg portion of an offshore drilling or production platform sump tank for conveying water, separated from oil, into contact with organophilic media canisters such that the hydrocarbons and other organic materials commingled with the sump tank water will be adsorbed onto the organophilic media and detected by the embedded probe in selected canisters. The canisters are provided in a plurality of stacks and are in fluid communication with a header disposed at the bottom of the vessel housing the various stacks of canisters. Solids that do not pass through the canisters are accumulated at the bottom of the vessel and easily drained through a drain port. The water will pass through the media and will be conveyed back to the ocean water without contamination. At some point in time, the organophilic media will become “spent” and at a certain “spent level”, the saturated condition of the organomedia will be electronically detected by the embedded probe and alarm/control panel. The alarm indicates that the “spent” organophilic media should be replaced with fresh media or the spent media regenerated.
Abstract:
Apparatus in fluid communication with a water leg portion of a hydrocarbon-contaminated water, e.g., a water leg portion of an offshore drilling or production platform sump tank for conveying water, separated from oil, into contact with organophilic media canisters such that the hydrocarbons and other organic materials commingled with the sump tank water will be adsorbed onto the organophilic media and detected by the embedded probe in selected canisters. The canisters are provided in a plurality of stacks and are in fluid communication with a header disposed at the bottom of the vessel housing the various stacks of canisters. Solids that do not pass through the canisters are accumulated at the bottom of the vessel and easily drained through a drain port. The water will pass through the media and will be conveyed back to the ocean water without contamination. At some point in time, the organophilic media will become nullspentnull and at a certain nullspent levelnull, the saturated condition of the organomedia will be electronically detected by the embedded probe and alarm/control panel. The alarm indicates that the nullspentnull organophilic media should be replaced with fresh media or the spent media regenerated.
Abstract:
A filtering apparatus comprises: a pressure vessel; a plurality of filter elements arranged within the pressure vessel, the filter elements each having an upper end, a lower end and a side wall; filling bodies positioned within the filter elements; a first conduit for introducing compressed gas into the pressure vessel; a second conduit for transporting unfiltered liquid to and from the pressure vessel; and a third conduit for removing filtrate from the pressure vessel and transporting back-flushing liquid to and from the filter elements, the third conduit positioned proximate to a bottom portion of the pressure vessel and attached to the lower ends of the filter elements, such that the third conduit provides a support structure for the filter elements and the back-flushing liquid introduced via the third conduit fills the filter elements in a direction from the lower ends toward the upper ends, the volume of back-flushing liquid introduced into the filter elements limited by the filling bodies. A method of operating the filtering apparatus is also disclosed.
Abstract:
An improved triangular filter cartridge and apparatus is provided comprising a generally cylindrical vessel having a plurality of generally triangularly shaped filter cartridges disposed therein. Each triangular filter cartridge has one of its substantially flat sides slightly spaced apart from and in direct facing relationship with the inner surface of the vessel, whereby a greater number of triangular filter cartridges can be compactly disposed within said vessel to increase the filtration capacity thereof.