摘要:
A rotating filter apparatus is disclosed having a stack of sintered filter discs mounted on a vertical, rotatable hollow shaft and located within a chamber, the shaft having a plurality of radial openings therein to the hollow bore of the shaft. Unfiltered fluid is introduced under pressure to a tangential entry port in the same direction as disc rotation. The shaft is rotated at a speed sufficient to create a water boundry on the surface to aid the filtering of particles. The clean filtered fluid flows inwardly through the discs and down through the shaft, while the unfiltered fluid and the solid particles, or sludge materials, descend in the chamber to the bottom of a concentration chamber, which includes inwardly slanted sidewalls. The free-flowing sludge flows out of an outlet connection, with the more solid sludge taken out either through a hydrocyclone or a tapered auger connection. The clean fluid is taken out of a discharge chamber surrounding the bottom of the shaft, the bottom of the shaft being angularly slotted to create a suction on the shaft at this location. Cartridge seals provide mounting for the shaft and periodic back pulsing is provided to dislodge lodged particles from the discs.
摘要:
A serum and cell separating and dispensing device comprising an elongated tubular vessel partitioned throughout its length forming two distinct compartments containing vent orifices on either side. One opened end of the vessel is fitted with a resilient element containing a larger and smaller orifice which houses a small and large pore filter respectively. These orifices communicate with the two compartments respectively. At the opposite end of the vessel are two small tubular vessels extending from and communicating with the compartments formed by the partition. Blood drawn in an evacuated collection tube such as Becton Dickinson's vacutainer is centrifuged after clotting. The device is forced into the opened end of the collection tube and pressed downwardly. The resilient element forms an air trap by touching the inner wall of the collection tube and serum is forced through the orifices containing the filters. Due to the pore size of the filters and the size of the orifices, serum and cells become located within the separate compartments. One may tilt the assembly in one direction allowing drops of serum to be dispensed whereas turning the assembly in another direction allows dispensing of cells. In this manner blood samples from patients may be dispensed for crossmatching purposes without using the usual droppers. At the same time integrity of patients identification is maintained.
摘要:
Process for dewatering thickened sludge comprising the steps of depositing thickened sludge onto a porous support, partially dewatering the thickened sludge by establishing a vacuum within said porous support, compressing the partially dewatered sludge on said porous support at a pressure of from 1 to 10 kp/cm.sup.2 to further dewater the sludge and to form a sludge cake, compressing the sludge cake on the porous support at a pressure of from 10 to 300 kp/cm.sup.2 to further dewater the sludge cake and discharging the dewatered sludge cake from the porous support.
摘要:
A device for treating oil used in potato chip frying apparatus comprises a housing which has a passage for the circulation of the oil therethrough and with a filter extending completely across the passage which has openings for the passage of the oil for circulating it back to the fryer. A rectifying plate is pivotally mounted across the passage and positioned in the oil stream ahead of the filter. The plate defines a means for deflecting the oil immediately ahead of the filter so that the full flow pressure of the oil does not impinge directly against the filter.
摘要:
A cell for placing solid matter on a piece of slide glass in such a manner that it is rotated in a centrifugal separator, which is formed integrally by mold forming of synthetic resin thereby to be disposable, and a base plate of a cell portion has an elasticity so as to be easily engaged with a hook provided on a holder in which the base plate is held.
摘要:
A cytocentrifuge especially suitable for centrifugation of materials requiring handling under conditions of containment is characterized by a plurality of holders each adapted to retain an individual sample chamber in juxtaposition to a receiving surface with interposed filter/seal and removable as a unit from the rotating carrier of the machine. The holder is preferably adapted to be supported tiltingly by the carrier so as only under centrifugal force to permit a sample to contact the receiving surface and while this is perpendicular to the centrifugal load on the sample. The carrier is preferably an apertured plate removable from a drive hub for cleansing and sterilization, and the drive hub forms part of a sealable head assembly of containment bowl and removable cover, the head assembly being removable as a unit for loading/unloading under containment conditions.
摘要:
A filter apparatus has an elongated shaft, a plurality of filtering elements mounted on the shaft and spaced from one another in direction of elongation of the latter, and means for cleaning the filtering elements. The cleaning means includes a source of cleaning medium under elevated pressure and a plurality of nozzle elements communicating with this source. The nozzle elements face toward surfaces of filtering material provided on the filter elements and are turnable relative to these surfaces. The cleaning medium is ejected from the nozzle elements at a pressure between substantially 5 and 100 bar toward the surfaces of the filtering material of the filter elements so that the cleaning medium removes a cake deposited during a filtering process from the surfaces of the filtering material and thereupon also cleans the filtering material of the filter elements.
摘要:
A water intake screen installation has a traveling water screen unit, that is positioned between a water intake and a stream of water flowing in a channel, to strain a quantity of water diverging from the channel stream towards the water intake. The screen unit includes an endless belt strainer in the form of a loop and a drive for revolving the strainer. The strainer has a screening surface, that extends in a predetermined direction of stream flow in the channel and in an upwardly direction. Means are provided for directing a backwash current, through the screening surface, towards the stream of water flowing in the channel, at an elevation below the stream surface. Material, such as refuse and aquatic life, retained on the screening surface can be dislodged by the backwash current. This current forces such material backwardly from the screening surface, into the stream of water flowing in the channel, to be carried away therewith. Also disclosed is a method of straining water from a stream with the above described screening installation that enables water to be drawn from the stream without the removal of aquatic life and refuse.
摘要:
Pumps or other fluids handling devices are protected from contaminants in the fluids by alternately presenting localized portions of a filter media to the flow paths of fluids entering and leaving the device to filter out the contaminants from the fluids entering the device and to flush out the filter media with the fluids leaving the device. In a preferred embodiment, a continuous revolving filter intersects the inlet and discharge passages of a pump to divert contaminant particles in the fluid from the pump inlet to the pump outlet without allowing the particles to pass through the pump, and concurrently backwashing the filter element by pressurized fluid from the pump.
摘要:
A mud slurry cleaning method including steps of distributing a mud slurry across an inclined primary separation screen, vibrating the primary screen through selected movement, cycle and frequency to screen out the liquid and selected particles, concurrently changing the geometric shape of the openings of the primary screen through each vibration cycle to free particles as might tend to lodge while concurrently impacting the primary screen at many spaced apart impact points to loosen particles tending to lodge, cyclonically separating the screened mud into a finally cleaned slurry and a thickened slurry including particles originally included in the original slurry, mixing the thickened slurry with a portion of the screened slurry to form a liquified slurry, distributing the liquified slurry across an inclined gleaning screen, and vibrating the gleaning screen as above described to screen out liquid and desired particles while concurrently changing the geometric shape of the openings of the screen and concurrently impacting the screen to loosen particles as above described. Mixing the clean slurry from the hydrocyclone separators with the liquid coming through the gleaned screen for return for use in the wellbore. Also discloses specialized apparatus used in the method.