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US 4,279,760 AGranted
Process and apparatus for continuous cake filteration under pressure
OwnerSamuroh Yamamotoinventor
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OwnerSamuroh Yamamotoinventor
Estimating the term…
The present invention utilizes a closed-type vessel comprising a filtering chamber, at least one perforated filter cylinder a portion of which is positioned within the filtering chamber, said filter cylinder being rotatable at any desired speed and having a filtering surface covered with a filter cloth, and a squeezing roll and sealing roll which engage with said filter cylinder through the filter cloth at all times to define a sealing and operating wall. Any sewage to be treated is supplied under pressure to the filtering chamber and filtered through the filter cloth at the filtering surface of the filter cylinder. Filter cake deposited on the filter cloth is continuously transferred to the outer periphery of the squeeze roll and then separated therefrom outside the filtering chamber by any suitable means such as a scraper.
A process for continuous pressure filtration comprising rotating at least one perforated filter cylinder in a vessel so that at least a portion of the filter cylinder defines in part a filtering chamber and another part of the filtering chamber is defined by said vessel, said filter cylinder having a filtering surface covered with a filter medium, sealing said filtering chamber in at least two locations by at least two sealing and squeezing rolls between said filter cylinder and the walls of said vessel, disposing each of said sealing and squeezing rolls at a position at least partially below the upper level of said filtering chamber, supplying raw slurry under pressure to said filtering chamber, effecting pressure filtration through said filter medium on said filter cylinder, continuously removing filter cake from the filter cylinder by utilizing at least one of said sealing and squeezing rolls, discharge said filter cake externally of said filtering chamber, and removing the filtered liquid from the inside of said filter cylinder.
A process for continuous pressure filtration comprising rotating at least one perforated filter cylinder about a vertical axis in a vessel so that at least a portion of the filter cylinder defines in part a filtering chamber and another part of the filtering chamber is defined by said vessel, said filter cylinder having a filtering surface covered with a filter medium, sealing said filtering chamber in at least two locations by at least two sealing and squeezing rolls rotatable about vertical axes between said filter cylinder and the walls of said vessel, supplying raw slurry under pressure to said filtering chamber, effecting pressure filtration through said filter medium on said filter cylinder, continuously removing filter cake from the filter cylinder by utilizing at least one of said sealing and squeezing rolls, discharge said filter cake externally of said filtering chamber, and removing the filtered liquid from the inside of said filter cylinder.
Apparatus for continuous pressure filtration comprising a closed-type filter vessel defining in part a filtering chamber, at least one perforated filtering cylinder rotatably mounted in said vessel such that a portion of said filtering cylinder extends into said filtering chamber and the remaining portion extends externally of said filtering chamber, means for rotating said filtering cylinder, said filtering cylinder having a filtering surface covered with a filter medium, at least two sealing and squeezing roller means rotatably mounted on said vessel and each in contact at different locations with said filter medium on said filtering cylinder and in contact with said vessel, each of said sealing and squeezing roller means being disposed and arranged such that said contact with said filter medium and said vessel provides a closed and sealed filtering chamber which is operable to receive under pressure slurry to be filtered, each of said different contact locations between said sealing and squeezing roller means and said filter medium being disposed, at least partially, below the upper level of said sealed filtering chamber, said filter medium transferring filter cake to said sealing and squeezing roller means, supply means for supplying under pressure said slurry to be filtered to said closed and sealed filtering chamber, said supply means comprising at least one slurry tank and a duct means connecting said slurry tank to said filtering chamber, cake discharging means located externally of said filtering chamber for discharging filter cake from said sealing and squeezing roller means, and outlet means for exhausting filtered liquid which passes through said filter medium and the perforated filtering cylinder.
Apparatus for continuous pressure filtration comprising a closed-type filter vessel defining in part a filtering chamber, at least one perforated filtering cylinder mounted in said vessel for rotation about a vertical axis and disposed such that a portion of said filtering cylinder extends into said filtering chamber and the remaining portion extends externally of said filtering chamber, means for rotating said filtering cylinder, said filtering cylinder having a filtering surface covered with a filter medium, at least two sealing and squeezing roller means rotatably mounted on said vessel for rotation about vertical axes and each in contact at different locations with said filter medium on said filtering cylinder and in contact with said vessel, each of said sealing and squeezing roller means being disposed and arranged such that said contact with said filter medium and said vessel provides a closed and sealed filtering chamber which is operable to receive under pressure slurry to be filtered, said filter medium transferring filter cake to said sealing and squeezing roller means, supply means for supplying under pressure said slurry to be filtered to said closed and sealed filtering chamber, cake removing means located externally of said filtering chamber for removing filter cake from said sealing and squeezing roller means, and outlet means for exhausting filtered liquid which passes through said filter medium and the perforated filtering cylinder.
Apparatus for continuous pressure filtration comprising a closed-type filter vessel defining in part a filtering chamber, at least one perforated filtering cylinder mounted in said vessel for rotation about a horizontal axis and disposed such that a portion of said filtering cylinder extends into said filtering chamber and the remaining portion extends externally of said filtering chamber, means for rotating said filtering cylinder, said filtering cylinder having a filtering surface covered with a filter medium, at least two sealing and squeezing roller means rotatably mounted on said vessel for rotation about horizontal axes and each in contact at different locations with said filter medium on said filtering cylinder and in contact with said vessel, each of said sealing and squeezing roller means being disposed and arranged such that said contact with said filter medium and said vessel provides a closed and sealed filtering chamber which is operable to receive under pressure slurry to be filtered, said filter medium transferring filter cake to said sealing and squeezing roller means, supply means for supplying under pressure said slurry to be filtered to said closed and sealed filtering chamber, cake removing means located externally of said filtering chamber for removing filter cake from said sealing and squeezing roller means, and outlet means for exhausting filtered liquid which passes through said filter medium and the perforated filtering cylinder.
Dependencies are inferred from the claim text.