US2834474A - Strainer apparatus - Google Patents

Strainer apparatus Download PDF

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Publication number
US2834474A
US2834474A US429308A US42930854A US2834474A US 2834474 A US2834474 A US 2834474A US 429308 A US429308 A US 429308A US 42930854 A US42930854 A US 42930854A US 2834474 A US2834474 A US 2834474A
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Prior art keywords
strainer
face
doctor
filtrate
solid material
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US429308A
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Jalkanen Matti Johannes
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Repola Oy
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Rauma Repola Oy
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
    • B01D29/036—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting ring shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
    • B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/668—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with valves, e.g. rotating valves for coaxially placed filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
    • B01D29/86—Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
    • B01D33/17—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with rotary filtering tables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/466—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/04—Flat screens

Definitions

  • the present invention relates to strainer apparatus. More particularly, the invention relates to counter cu'rrent wash towers, counter-current thickener towers or countercurrentbleaching towers adapted for treating sjlurries of fibrous matter such as a suspension of material as pulp and paper stock.
  • the present invention relates to a strainer apparatus which comprises, in combination, strainer means having a first face on which a suspension ofsolid material to be strained is deposited, the filtrate passing in one direction through the strainer means to the second face thereof and a deposit of solid material remaining on the first face of the strainer means, doctor means arranged adjacent the first face of the strainer means and having a cleaning edge extending along the same, moving means moving one of the means relative to the other with the cleaning edge of the doctor means movingrelative to and along the first face of the strainer means, and loosening means for forcing filtrate which has passed in the onedirection through the strainer means back in the opposite direction from the second face through thestrainer means to the first face thereof and in front of the cleaning edge of the doctor means, the loosening means being mounted in a position fixed relative to the doctor means for forcing filtrate out ofthe first face of the strainer means at a constant distance from the cleaning edge of the doctor means duringmovement thereof relative to the strainer means, so-as
  • either the doctor means may be rotated relative to a stationary strainer means, or the strainer means may be rotated relative to a fixeddoctor-means.
  • the strainer means in the device constructed in-accordance with the invention is preferably formed with wall portions enclosing the second face thereof soas to form a plurality of cells communicating with different portions of the first face thereof, the loosening means including conduit means communicating successivelywith the plurality of cells during relative movement of the strainer means and the doctor means.
  • a filtrate chamber is preferably arranged adjacent the strainermeans for collecting the filtrate passing therethrough, the loosening means being connected to the filtrate chamber for reintroducing a portion of the filtrate therein back througl the strainer means, and the filtrate chamber having an outlet for discharging the remainder of the filtrate.
  • Fig. 1 is a diagrammatic view illustrating the cleaning principle in accordance with the invention
  • Fig. 2 is a vertical sectional view of one embodiment of an apparatus constructed in accordance with the invention.
  • Fig. 3 is a horizontal sectional view taken along the line III-III of Fig. 2;
  • Fig. 4 is a horizontalsectional view taken along the line lV-lV of Fig. 2;
  • Fig. 5 is a vertical sectional view taken along the line VV of Fig. 2;
  • Fig. 6 is a vertical sectional view of another embodiment of the invention.
  • Fig. 7 is a horizontal sectional view taken along the line VlI--VII of Fig. 6;
  • Fig. 8 is a vertical sectional view of still another embodiment ofthe invention.
  • a strainer wall In and a doctor means 4a there is shown in the latter figure a strainer wall In and a doctor means 4a, the strainer wall 1a being movable in the direction of the arrow a relative to the doctor means 4a.
  • a slurry receiving container means 2a Arranged on one side of the strainer wall 1a is a slurry receiving container means 2a in which there is shown thickened solid matter tin-deposited on the upper face of strainer wall 1a.
  • a slurry inlet 5a serves to conduct slurry into the container 2a and beneath the doctor means 40, via inlet channel 17a.
  • a filtrate collecting chamber 3a On the other side of strainer wall 1a there is arranged a filtrate collecting chamber 3a, having an outlet 6a connected thereto and a-conduit in which pump 7a is arranged for returning part of the filtrate back to the strainer wall 1a via a shoe or spout member 8a.
  • one part of the liquid collecting in the chamber 3a is discharged to the outside via outlet 6a, while a second part of the liquid is reintroduced in reverse flow by means of the pump 7a and the spout member 8a into the slurry container 2a through that portion of the strainer wall 1a which is positioned directly in front of the leading edge 15a of the doctor means 4a, as is shown by arrows c.
  • the strainer walll within thetower 18 is stationary while the spout member. 8 for distributing the recycled cleaning liquid and the doctor means 4 are arranged for movement with the rotatable vertical shaft 10 which is provided with agitator arms 23.
  • the strainer wall 1 rests on supporting walls 19 arranged so as to form a series of cells 12 under the strainer wall 1.
  • the strained liquid passing through strainer wall 1 is adapted to be conducted through the cells 12 into the filtrate collecting chamber 3 which is also located beneath the strainer wall 1 and is encircled by the filtrate collecting cells 12, the filtrate chamber 3 having apertures 22 in the wall thereof communicating with the individual cells for the passage of liquid therethrough.
  • the spout member 8 is arranged to rotate with the shaft 10 and to communicate with the filtrate collecting chamber 3 via the tubular lower end 28 of the shaft 10, the pump 7, the pressure pipe 27 and the suction pipe 26. Spout member 8 during such rotation moves within the chamber 3 so that each of the cells 12 consecutively communicates via the apertures 22 with the outlet end of the spout member 8, while the rest of the cells 12 all communicate with the collecting chamber 3.
  • doctor means 4 when viewed in plan is sector-shaped.
  • the leading part of doctor means 4 consists of an inclined surface 15 serving as a blade or doctor proper and a top surface 4b, the surfaces 15 and 4b with strainer wall 1 defining an inlet channel 17 within the doctor means 4 for accommodating the slurry.
  • an annular slurry inlet duct 13 is arranged in the bottom part of tower 18 above the strainer wall 1.
  • Inlet conduit serves to introduce slurry into the duct 13, from which it is discharged through slot 14 in the bottom part of duct 13 into the slurry inlet channel 17 within doctor means 4, as indicated by arrow d in Fig. 3.
  • a projecting member 16 is secured to the periphery of doctor means 4 and during rotation of the doctor means serves to guide the movement of fresh slurry introduced into annular duct 13 underneath doctor means 4.
  • doctor means 4 passes further over the strainer wall 1, thickened fibrous matter will remain deposited on the strainer wall and is subjected to the pressure of the pulp already in the tower 18, and liquid will continue to separate therefrom and pass into filtrate chamber 3 for the reason that when doctor means 4 moves forward, previously deposited matter will glide along and over the top surface of doctor means 4 until it drops over the trailing edge of the doctor means and settles upon the new layer of matter issuing from the inlet channel 17 within the doctor means 4.
  • the annular duct 13 may be replaced by an inlet pipe arranged to pass through vertical shaft 10 and terminating in the inlet channel 17 of doctor means 4.
  • the strainer wall 1 is secured to the drive shaft 10 and arranged to rotate relative to the stationary doctor means 4 and the ture 24 so that during rotation of the strainer Wall 1' 4 together with its supporting structure 19' each cell 12' will consecutively communicate with the spout member 8', While the remainder of the cells 12 will concurrently communicate with the filtrate collecting chamber 3 which encircles the apertured cell portions.
  • one part of'the filtrate collected in chamber 3 is discharged to the outside via pipe 6', while a second part of the filtrate is recycled, by means of the pump 7' and the spout member 8', in the manner previously described through the strainer wall 1 into the slurry container.
  • Fresh slurry is introduced via the inlet conduit 5' directly into the inlet channel 17' of the doctor means, the slurry passing therefrom into the container means 2, because the rotatably mounted strainer wall 1' renders the annular slurry inlet duct 13 superfluous.
  • the embodiment shown in Fig. 8 differs from the one shown in Figs. 2-5 in that the filtrate collecting cells 12" which are located underneath the strainer wall 1" are connected by conduits 24" to a separate filtrate collecting chamber 3".
  • the advantageof this embodiment resides in the relative simplicity of its construction, the arrangement of the parts thereof rendering it easy to manipulate and maintain in operation.
  • the strainer wall means may be arranged in a manner other than as described above, as, for instance, by utilizing as a strainer wall a cylindrical screen'arranged in a vertical position within the container means.
  • the doctor means is advantageously arranged within the cylindrical screen while recycled liquid under pressure is re-introduced into the cylindrical screen through ducts arranged between the the screen cylinder and the filtrate collecting chamber.
  • the invention also contemplates the arrangement of the strainer means in the upper portion of the container means, or, if the container means is horizontal, the strainer means could be arranged in one end of the container means while any suitable means is employed for producing the pressure differences required for liquid transfer.
  • the invention also contemplates the use of one or more doctor means as well as a plurality of spout members arranged to cooperate with one and the same strainer structure and the associated parts.
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and'having a horizontal first upwardly directed face on which a suspension of solid material to asses-74 be strained is deposited, the filtrate passing'in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other With said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for forcing filtrate which has passed in said one direction through said strainer means back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining .on said first face of said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first-face of said strainer means; and loosening means for forcing filtrate which has passed in said one'direction through said strainer means back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning'edge of said doctor means during movement thereof relative to said strainer means,
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said doctor means relative to said strainer means with said cleaning edge of said doctor means moving relative to and along said firstface of said strainer means; and loosening means for forcing filtrate which has passed in said one direction through said strainer means back in the opposite direction from said second face through said strainer means to said first face thereof andin front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the clean ing edge of said doctor means during movement thereof relative tosaid strainer means, so as
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through. said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said strainer means relative to said doctor means with said cleaning edge of said doctor means moving relative to and along said firstface of said strainer means; and loosening means for forcing filtrate which has passed in said one direction through said strainer means back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means, during movement thereof relative to said strainer means, so as to
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said-strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor
  • a strainer apparatus in combination, an upright municating with different portions of the first face thereof; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving meansmoving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, and pump means in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communication with said conduit means, so
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom'of said container and having a horizontal first upwardly directed face on which a suspension of solid material to, be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on whicha suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof spasm and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same;moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative and along said first face of said strainer means; loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said doctor means relative to said strainer means with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said strainer means relative to said doctor means withsaid cleaning edge of said doctor means moving relative to and along said first face ofsaid strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means beingmounted in a position relative to
  • an upright containerg strainer means arranged-near the bottom of said container and having a horizontal first upwardly directedfaceon which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said-strainer means to the second face thereof and a deposite of strained solid materialremaining on said first face of said strainer means, said strainer means having wallportions enclosing said second face thereof and forming therewith aplurality of cells communicating-with'diiferent portions of the first face thereof; stationary filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctormeans arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said doctor means realtive to said strainer means with said cleaning-edge of-said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through saidstrainer means and forcing
  • said loosening means being mounted in a position relative to said doctonmeans for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means,-said loosening means comprising conduit meanshaving an outlet portion rotatable with said doctor means and-communicating at its inlet end with said catingsuccessively with said plurality of cells during relative movement of said strainer means andsaid doctormeans, and pump mean: in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communication with said rotatable outlet portion of said conduit means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strainedsolid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face.
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom 'of said container and having a horizontal first upwardly directed face on which a suspension of solid-material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said-strainer means, said strainer means having Wall portions enclosing saidsecond face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; stationmy filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said doctor means relative to said strainer means with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means;'loosen .ing means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of saidcontainer and having a horizontal first upwardly directed face on which a suspension of solid material to'be strained is deposited, the filtrate passing in one direction through said strainer means'to the second face thereof anda deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; stationary filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged adjacent said first face of said strainer filtrate chamber means and at its outlet end communimeans and having a cleaning edge extending along the same; rotating means rotating said strainer means relative to said doctor means with saidcleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; stationary filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said strainer means relative to said doctor means with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means; container means extending around said first face of said strainer means for receiving a suspension of solid material to be deposited on said strainer means; inlet means connected to said container means for introducing a suspension of solid material therein; doctor means arranged in said container means adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; loosening means for forcing a portion of the filtrate which has passed in said one direction through said strainer means back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means; container means extending around said first face of said strainer means for receiving a suspension of solid material to be deposited on said strainer means; inlet means connected to said container means for introducing a suspension of solid material therein; doctor means arranged in said container means adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; filtrate chamber means for receiving filtrate from said strainer means; loosening means for forcing a portion of the filtrate in said filtrate chamber means which has passed in said one direction through said strainer means back in the opposite direction from said second
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardlydirected face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on saidfirstface of saidstrainermeans, said strainer means having Wall portions enclosing said second face thereof and forming therewiLh a plurality of cells communicating with different portions of the first face thereof; container means extending around'said first'face of said strainer means for receiving a suspensionof solid material to be deposited on said strainer means; inlet meansconnected to said container means for introducing a suspension of solid material therein; doctor means arranged in said container means adjacent said first face of said strainer means and having acleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; loosening means for receiving a
  • said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face; and outlet means for discharging the remainder of said filtrate.
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; container means extending around said first face of said strainer means for receiving a suspension of soild material to be deposited on said strainer means; inlet means connected to said container means for introducing a suspension of solid material therein; doctor means arranged in said container means adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said doctor means relative to said strainer means with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; loosening means for receiving a portion of the filtrate which
  • -In-a'strainer apparatus in combination, an upright container; strainer means arranged nearthe bottom of said container and having a horizontal'first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passin'g'in one direction through said strainer means to the second face thereof-anda deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; container means extending around said first faceof said strainer-means forreceiving a suspension" of solid material to be deposited on said strainer means; inlet means connected to said container means for introducing a suspension of solid material therein; doctor means arranged in said container means adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said strainer means relative to said doctor means with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; loose
  • a strainer apparatus in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having Wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; container means extending around said first face of said strainer means for receiving a suspension of solid material to be deposited on said strainer means; inlet means connected to said container means for introducing a suspension of solid material therein; filtrate chamber means arranged adjacent said strainer means communicating With said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged in said container means adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative
  • said loosening means comprising conduit means communicating at its inlet end with said filtrate chamber means and at its outlet end communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, and pump means in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communication with said conduit means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face; and outlet means connected to said filtrate chamber means for discharging the remainder of said filtrate.

Description

May 13, 1958 M. J. JALKANEN STRAINER APPARATUS 4 Sheets-Sheet 2 Filed y 12. 1954 FlG.4
STRAINER APPARATUS Matti Johannes Jalkanen, Rauma, Finland, assigno'rto Rauma-Repola y, Rauma, Finland Application May 12, 1954, Serial No. 429,308 Claims priority, application Finland May 28, 1953 20 Claims. (Cl. fill- 408) The present invention relates to strainer apparatus. More particularly, the invention relates to counter cu'rrent wash towers, counter-current thickener towers or countercurrentbleaching towers adapted for treating sjlurries of fibrous matter such as a suspension of material as pulp and paper stock.
Washer and thickener devices of the above type are disclosed in applicants co-pending application, Serial No. 324,934, filed December 9, 1952, now Patent No. 2,802,- 572, of which this application is a continuation-impart, the present invention being an improvement on' such types of Washers and thickeners.
it is an object of the present invention to provide strainer devices in apparatus of. the above types inwhich means are provided for freeing the strainer of deposited solid material which tends to clog the strainer.
It is another object of the present invention to provide for improved straining in apparatus of the above types.
With the above objects in view, the present invention relates to a strainer apparatus which comprises, in combination, strainer means having a first face on which a suspension ofsolid material to be strained is deposited, the filtrate passing in one direction through the strainer means to the second face thereof and a deposit of solid material remaining on the first face of the strainer means, doctor means arranged adjacent the first face of the strainer means and having a cleaning edge extending along the same, moving means moving one of the means relative to the other with the cleaning edge of the doctor means movingrelative to and along the first face of the strainer means, and loosening means for forcing filtrate which has passed in the onedirection through the strainer means back in the opposite direction from the second face through thestrainer means to the first face thereof and in front of the cleaning edge of the doctor means, the loosening means being mounted in a position fixed relative to the doctor means for forcing filtrate out ofthe first face of the strainer means at a constant distance from the cleaning edge of the doctor means duringmovement thereof relative to the strainer means, so-asto thereby loosen the deposit ofsolid material on the first face of the strainer means.
in accordance with the invention,-either the doctor means may be rotated relative to a stationary strainer means, or the strainer means may be rotated relative to a fixeddoctor-means.
The strainer means in the device constructed in-accordance with the invention is preferably formed with wall portions enclosing the second face thereof soas to form a plurality of cells communicating with different portions of the first face thereof, the loosening means including conduit means communicating successivelywith the plurality of cells during relative movement of the strainer means and the doctor means.
In accordance with the invention, a filtrate chamber is preferably arranged adjacent the strainermeans for collecting the filtrate passing therethrough, the loosening means being connected to the filtrate chamber for reintroducing a portion of the filtrate therein back througl the strainer means, and the filtrate chamber having an outlet for discharging the remainder of the filtrate.
The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:
Fig. 1 is a diagrammatic view illustrating the cleaning principle in accordance with the invention;
Fig. 2 is a vertical sectional view of one embodiment of an apparatus constructed in accordance with the invention;
Fig. 3 is a horizontal sectional view taken along the line III-III of Fig. 2;
Fig. 4 is a horizontalsectional view taken along the line lV-lV of Fig. 2;
Fig. 5 is a vertical sectional view taken along the line VV of Fig. 2;
Fig. 6 is a vertical sectional view of another embodiment of the invention;
Fig. 7 is a horizontal sectional view taken along the line VlI--VII of Fig. 6; and
Fig. 8 is a vertical sectional view of still another embodiment ofthe invention. A
' Referring now to the drawings, and particularly to Fig. 1, there is shown in the latter figure a strainer wall In and a doctor means 4a, the strainer wall 1a being movable in the direction of the arrow a relative to the doctor means 4a. Arranged on one side of the strainer wall 1a is a slurry receiving container means 2a in which there is shown thickened solid matter tin-deposited on the upper face of strainer wall 1a. A slurry inlet 5a serves to conduct slurry into the container 2a and beneath the doctor means 40, via inlet channel 17a. On the other side of strainer wall 1a there is arranged a filtrate collecting chamber 3a, having an outlet 6a connected thereto and a-conduit in which pump 7a is arranged for returning part of the filtrate back to the strainer wall 1a via a shoe or spout member 8a.
When slurry is introduced via inlet 5a intothe inlet channel 17a and therefrom into the container means 2a,
liquid will pass through the strainer wall 1a into the filtrate collecting chamber 3a as indicated by arrows 17, while solid matter, e. g., fibrous material, will thicken and form a layer on the surface of the strainer wall In.
In accordance with the invention, one part of the liquid collecting in the chamber 3a is discharged to the outside via outlet 6a, while a second part of the liquid is reintroduced in reverse flow by means of the pump 7a and the spout member 8a into the slurry container 2a through that portion of the strainer wall 1a which is positioned directly in front of the leading edge 15a of the doctor means 4a, as is shown by arrows c. When the pump pressure is so selected that it always overcomes the pressure prevailing in the slurry container 2a,'-the recycled cleaning liquid will be forced through the strainer wall portion in front of the leading edge 15a, and in doing this it will lift the solid matter collected thereon onto the leading edge 15a of doctor means 4a, and from this point the solid material will slide over the top surface of the doctor means and upon the fresh slurry fed continuously onto the clean portion of the strainer wall 1a.
In the embodiment shown in Figs. 2-5, the strainer walll within thetower 18 is stationary while the spout member. 8 for distributing the recycled cleaning liquid and the doctor means 4 are arranged for movement with the rotatable vertical shaft 10 which is provided with agitator arms 23. The strainer wall 1 rests on supporting walls 19 arranged so as to form a series of cells 12 under the strainer wall 1. The strained liquid passing through strainer wall 1 is adapted to be conducted through the cells 12 into the filtrate collecting chamber 3 which is also located beneath the strainer wall 1 and is encircled by the filtrate collecting cells 12, the filtrate chamber 3 having apertures 22 in the wall thereof communicating with the individual cells for the passage of liquid therethrough.
The spout member 8 is arranged to rotate with the shaft 10 and to communicate with the filtrate collecting chamber 3 via the tubular lower end 28 of the shaft 10, the pump 7, the pressure pipe 27 and the suction pipe 26. Spout member 8 during such rotation moves within the chamber 3 so that each of the cells 12 consecutively communicates via the apertures 22 with the outlet end of the spout member 8, while the rest of the cells 12 all communicate with the collecting chamber 3.
As shown more clearly in Fig. 3, the doctor means 4 when viewed in plan is sector-shaped. The leading part of doctor means 4 consists of an inclined surface 15 serving as a blade or doctor proper and a top surface 4b, the surfaces 15 and 4b with strainer wall 1 defining an inlet channel 17 within the doctor means 4 for accommodating the slurry. For the purpose of introducing slurry into the inlet channel 17, an annular slurry inlet duct 13 is arranged in the bottom part of tower 18 above the strainer wall 1. Inlet conduit serves to introduce slurry into the duct 13, from which it is discharged through slot 14 in the bottom part of duct 13 into the slurry inlet channel 17 within doctor means 4, as indicated by arrow d in Fig. 3. A projecting member 16 is secured to the periphery of doctor means 4 and during rotation of the doctor means serves to guide the movement of fresh slurry introduced into annular duct 13 underneath doctor means 4.
The above-described apparatus operates as follows:
When a slurry ,or other suspension of solid material, e. g., pulp stock, is fed into the doctor means 4, it spreads within the container formed by tower 18 upon strainer wall 1 while liquid separates therefrom through the strainer wall 1 and passes therethrough via cells 12 into the filtrate collecting chamber 3. The most effective liquid separation and deposition of fibrous matter occurs at that portion of the strainer wall which is cleaned by the doctor blade 15, and the filtered liquid issues from under doctor blade 15 when the same moves forward along the strainer wall 1. When the doctor means 4 passes further over the strainer wall 1, thickened fibrous matter will remain deposited on the strainer wall and is subjected to the pressure of the pulp already in the tower 18, and liquid will continue to separate therefrom and pass into filtrate chamber 3 for the reason that when doctor means 4 moves forward, previously deposited matter will glide along and over the top surface of doctor means 4 until it drops over the trailing edge of the doctor means and settles upon the new layer of matter issuing from the inlet channel 17 within the doctor means 4.
The annular duct 13 may be replaced by an inlet pipe arranged to pass through vertical shaft 10 and terminating in the inlet channel 17 of doctor means 4.
In the embodiment shown in Figs. 6 and 7, the strainer wall 1 is secured to the drive shaft 10 and arranged to rotate relative to the stationary doctor means 4 and the ture 24 so that during rotation of the strainer Wall 1' 4 together with its supporting structure 19' each cell 12' will consecutively communicate with the spout member 8', While the remainder of the cells 12 will concurrently communicate with the filtrate collecting chamber 3 which encircles the apertured cell portions.
As in the first-described embodiment, here also one part of'the filtrate collected in chamber 3 is discharged to the outside via pipe 6', while a second part of the filtrate is recycled, by means of the pump 7' and the spout member 8', in the manner previously described through the strainer wall 1 into the slurry container. Fresh slurry is introduced via the inlet conduit 5' directly into the inlet channel 17' of the doctor means, the slurry passing therefrom into the container means 2, because the rotatably mounted strainer wall 1' renders the annular slurry inlet duct 13 superfluous.
The embodiment shown in Fig. 8 differs from the one shown in Figs. 2-5 in that the filtrate collecting cells 12" which are located underneath the strainer wall 1" are connected by conduits 24" to a separate filtrate collecting chamber 3". The advantageof this embodiment resides in the relative simplicity of its construction, the arrangement of the parts thereof rendering it easy to manipulate and maintain in operation.
The embodiment shown in the drawings and described above are given only by way of example merely to illustrate the concept involved in the invention, and it is to be understood that the invention is not limited to the .embodiments shown. Thus, for example, the strainer wall means may be arranged in a manner other than as described above, as, for instance, by utilizing as a strainer wall a cylindrical screen'arranged in a vertical position within the container means. In such a form, the doctor means is advantageously arranged within the cylindrical screen while recycled liquid under pressure is re-introduced into the cylindrical screen through ducts arranged between the the screen cylinder and the filtrate collecting chamber.
The invention also contemplates the arrangement of the strainer means in the upper portion of the container means, or, if the container means is horizontal, the strainer means could be arranged in one end of the container means while any suitable means is employed for producing the pressure differences required for liquid transfer. The invention also contemplates the use of one or more doctor means as well as a plurality of spout members arranged to cooperate with one and the same strainer structure and the associated parts.
It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of apparatus for treating suspensions of solid matter differing from the types described above.
While the invention has been illustrated and described 'as embodied in a strainer apparatus for treating slurry, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of present invention. I Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications Without omitting features that, from the standpoint of prior art, fairly constitute essential characteristicsof the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.
What-is claimed as new and desired to be secured by Letters Patent is:
I 1. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and'having a horizontal first upwardly directed face on which a suspension of solid material to asses-74 be strained is deposited, the filtrate passing'in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other With said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for forcing filtrate which has passed in said one direction through said strainer means back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face.
2. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining .on said first face of said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first-face of said strainer means; and loosening means for forcing filtrate which has passed in said one'direction through said strainer means back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning'edge of said doctor means during movement thereof relative to said strainer means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal front face.
3. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said doctor means relative to said strainer means with said cleaning edge of said doctor means moving relative to and along said firstface of said strainer means; and loosening means for forcing filtrate which has passed in said one direction through said strainer means back in the opposite direction from said second face through said strainer means to said first face thereof andin front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the clean ing edge of said doctor means during movement thereof relative tosaid strainer means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accu- 6 mulates in said upright container to'apply pressure to the suspension of solid materialdeposited on said horizontal first face.
4. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through. said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said strainer means relative to said doctor means with said cleaning edge of said doctor means moving relative to and along said firstface of said strainer means; and loosening means for forcing filtrate which has passed in said one direction through said strainer means back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means, during movement thereof relative to said strainer means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face.
5. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said-strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means infront of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means communicating successively with said plurality of cells during relative movement of said strainer means and said doctor'rneans,
so' as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright containe to apply pressure to the suspension of solid material deposited on said horizontal first face.
6. In a strainer apparatus, in combination, an upright municating with different portions of the first face thereof; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving meansmoving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, and pump means in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communication with said conduit means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face.
7. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom'of said container and having a horizontal first upwardly directed face on which a suspension of solid material to, be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means communicating at its inlet end with said filtrate chamber means and at its outlet end communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, and pump means in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communication with said conduit means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face.
8. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on whicha suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof spasm and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same;moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative and along said first face of said strainer means; loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means communicating at its inlet end with said filtrate chamber means for receiving a portion of the filtrate therefrom and at its outlet end communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, and pump means in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communication with said conduit means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face; and outlet means communicating with said filtrate chamber means for discharging the remainder of the filtrate therefrom.
9. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said doctor means relative to said strainer means with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for or facing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means having an outlet portion rotatable with said doctor means and communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, and pump means in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communication with said rotatable outlet portion of said conduit means, so as to thereby loosen said deposit of solid material on said 9 first face ofsaid strainer means whereby the strained solid-material accumulates in said upright container to apply pressure to the suspensir; n of solid material deposited on said horizontal first face.
10. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said strainer means relative to said doctor means withsaid cleaning edge of said doctor means moving relative to and along said first face ofsaid strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means beingmounted in a position relative to said doctor means for forcing filtrate out of said first face of saidstrainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising stationary conduit means communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, and pump means in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communication with said conduit means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container-to apply pressure to the suspension of solid material deposited on said horizontal first face.
11. In a strainer apparatus, in combination, an upright containerg strainer means arranged-near the bottom of said container and having a horizontal first upwardly directedfaceon which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said-strainer means to the second face thereof and a deposite of strained solid materialremaining on said first face of said strainer means, said strainer means having wallportions enclosing said second face thereof and forming therewith aplurality of cells communicating-with'diiferent portions of the first face thereof; stationary filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctormeans arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said doctor means realtive to said strainer means with said cleaning-edge of-said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through saidstrainer means and forcing it back in the opposite direction from said second face through said strainer means to. said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctonmeans for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means,-said loosening means comprising conduit meanshaving an outlet portion rotatable with said doctor means and-communicating at its inlet end with said catingsuccessively with said plurality of cells during relative movement of said strainer means andsaid doctormeans, and pump mean: in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communication with said rotatable outlet portion of said conduit means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strainedsolid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face.
12. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom 'of said container and having a horizontal first upwardly directed face on which a suspension of solid-material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said-strainer means, said strainer means having Wall portions enclosing saidsecond face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; stationmy filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said doctor means relative to said strainer means with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means;'loosen .ing means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in-front of said cleaning edge of'said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means having an outlet portion rotatable with said doctor means and communicating at its inlet and with said fiitrate chamber means for receiving the portion of the filtrate therefrom and at its outlet end communicating successively with said plurality ofcells during relative movement ofsaid strainer means and said doctor means, and pump means in said conduit means for forcing the filtrate received by said conduit means back through said strainermeans via the respective cell in communication with said rotatable outlet portion of said conduit means so as to thereby loosen said deposit of solid material on said first'face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face;'
and outlet means communicating with said filtrate chamber means for discharging the remainder of the filtrate therefrom.
13. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of saidcontainer and having a horizontal first upwardly directed face on which a suspension of solid material to'be strained is deposited, the filtrate passing in one direction through said strainer means'to the second face thereof anda deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; stationary filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged adjacent said first face of said strainer filtrate chamber means and at its outlet end communimeans and having a cleaning edge extending along the same; rotating means rotating said strainer means relative to said doctor means with saidcleaning edge of said doctor means moving relative to and along said first face of said strainer means; and loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising stationary conduit means communicating at its inlet end with said filtrate chamber means and at its outlet end communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, and pump means in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communication with said conduit means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face.
14. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; stationary filtrate chamber means arranged adjacent said strainer means communicating with said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said strainer means relative to said doctor means with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; loosening means for receiving filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising stationary conduit means communicating at its inlet end with said filtrate chamber means for receiving a portion of the filtrate therefrom and at its outlet end communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, and pump means in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communicating with said conduit means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the sus: pension of solid material deposited on said horizontal first face; and outlet means communicating with said filtrate chamber means for discharging the remainder of the filtrate therefrom.
15. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means; container means extending around said first face of said strainer means for receiving a suspension of solid material to be deposited on said strainer means; inlet means connected to said container means for introducing a suspension of solid material therein; doctor means arranged in said container means adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; loosening means for forcing a portion of the filtrate which has passed in said one direction through said strainer means back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, so as to thereby loosen said deposit of solid material on said first face of said strainer means; and outlet means for discharging the remainder of said filtrate whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face.
16. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means; container means extending around said first face of said strainer means for receiving a suspension of solid material to be deposited on said strainer means; inlet means connected to said container means for introducing a suspension of solid material therein; doctor means arranged in said container means adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; filtrate chamber means for receiving filtrate from said strainer means; loosening means for forcing a portion of the filtrate in said filtrate chamber means which has passed in said one direction through said strainer means back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, so as to thereby loosen said deposit of solid material on said first face of said strainer means; and outlet means connected to said filtrate chamber means for discharging the remainder of said filtrate therein whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited 'on said horizontal first place.
17. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardlydirected face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on saidfirstface of saidstrainermeans, said strainer means having Wall portions enclosing said second face thereof and forming therewiLh a plurality of cells communicating with different portions of the first face thereof; container means extending around'said first'face of said strainer means for receiving a suspensionof solid material to be deposited on said strainer means; inlet meansconnected to said container means for introducing a suspension of solid material therein; doctor means arranged in said container means adjacent said first face of said strainer means and having acleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; loosening means for receiving a portion of the filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means,
said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face; and outlet means for discharging the remainder of said filtrate.
18. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; container means extending around said first face of said strainer means for receiving a suspension of soild material to be deposited on said strainer means; inlet means connected to said container means for introducing a suspension of solid material therein; doctor means arranged in said container means adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said doctor means relative to said strainer means with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; loosening means for receiving a portion of the filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face; and outlet means for discharging the remainder of said filtrate,
19. -In-a'strainer apparatus,in combination, an upright container; strainer means arranged nearthe bottom of said container and having a horizontal'first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passin'g'in one direction through said strainer means to the second face thereof-anda deposit of strained solid material remaining on said first face of said strainer means, said strainer means having wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; container means extending around said first faceof said strainer-means forreceiving a suspension" of solid material to be deposited on said strainer means; inlet means connected to said container means for introducing a suspension of solid material therein; doctor means arranged in said container means adjacent said first face of said strainer means and having a cleaning edge extending along the same; rotating means rotating said strainer means relative to said doctor means with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; loosening means for receiving a portion of the filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosening means being mounted ina position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face; and outlet means for discharging the remainder of said filtrate.
20. In a strainer apparatus, in combination, an upright container; strainer means arranged near the bottom of said container and having a horizontal first upwardly directed face on which a suspension of solid material to be strained is deposited, the filtrate passing in one direction through said strainer means to the second face thereof and a deposit of strained solid material remaining on said first face of said strainer means, said strainer means having Wall portions enclosing said second face thereof and forming therewith a plurality of cells communicating with different portions of the first face thereof; container means extending around said first face of said strainer means for receiving a suspension of solid material to be deposited on said strainer means; inlet means connected to said container means for introducing a suspension of solid material therein; filtrate chamber means arranged adjacent said strainer means communicating With said cells thereof for receiving filtrate passing through said strainer means; doctor means arranged in said container means adjacent said first face of said strainer means and having a cleaning edge extending along the same; moving means moving one of said means relative to the other with said cleaning edge of said doctor means moving relative to and along said first face of said strainer means; loosening means for receiving a portion of the filtrate which has passed in said one direction through said strainer means and forcing it back in the opposite direction from said second face through said strainer means to said first face thereof and in front of said cleaning edge of said doctor means, said loosen-.
ing means being mounted in a position relative to said doctor means for forcing filtrate out of said first face of said strainer means in front of the cleaning edge of said doctor means during movement thereof relative to said strainer means, said loosening means comprising conduit means communicating at its inlet end with said filtrate chamber means and at its outlet end communicating successively with said plurality of cells during relative movement of said strainer means and said doctor means, and pump means in said conduit means for forcing the filtrate received by said conduit means back through said strainer means via the respective cell in communication with said conduit means, so as to thereby loosen said deposit of solid material on said first face of said strainer means whereby the strained solid material accumulates in said upright container to apply pressure to the suspension of solid material deposited on said horizontal first face; and outlet means connected to said filtrate chamber means for discharging the remainder of said filtrate.
References Cited in the file of this patent UNITED STATES PATENTS Powell Nov. 8, Bird Dec. 26, Malone Ian. 16, Brown Feb. 27, McNeal Oct. 6, Wanner et a1. Jan. 6, MacNeil Feb. 9, Selensky July 3,
FOREIGN PATENTS Germany Oct. 15, Great Britain Aug. 14,
US429308A 1953-05-28 1954-05-12 Strainer apparatus Expired - Lifetime US2834474A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3074561A (en) * 1957-12-02 1963-01-22 Merz Engineering Inc Filtering mechanism
US3131145A (en) * 1962-03-12 1964-04-28 Rosaen Filter Co Fluid filtering device
US3275151A (en) * 1965-07-19 1966-09-27 S P Kinney Engineering Inc Disc-type strainer
US3425557A (en) * 1966-04-04 1969-02-04 Universal Filters Inc Backwash means for dual filter elements
US3994810A (en) * 1975-07-28 1976-11-30 Brunswick Corporation Onstream backflush filter
US4376705A (en) * 1980-09-19 1983-03-15 Nippon Dyeing Machine Manufacturing Co. Ltd. Filtering and drying apparatus
US4582603A (en) * 1983-12-24 1986-04-15 Taprogge Gesellschaft Mbh Apparatus for the mechanical cleaning of a cold-water stream
US4867879A (en) * 1984-05-25 1989-09-19 Taprogge Gesellschaft Mbh Pipeline sieve with a suction removal device
US6177022B1 (en) 1998-01-28 2001-01-23 James Benenson, Jr. Self-cleaning fuel oil strainer
US6517722B1 (en) 1998-01-28 2003-02-11 James Benenson, Jr. Self cleaning fuel oil strainer
US20030111430A1 (en) * 1998-01-28 2003-06-19 James Benenson Self cleaning water filter
US20080173594A1 (en) * 2004-05-23 2008-07-24 Rosenmund Vta Ag Method and Device For Removal of Residual Products
DE102011107043A1 (en) * 2011-07-09 2013-01-10 Sergio Brandolisio Filter device and method
CN111005252A (en) * 2019-12-20 2020-04-14 中冶美利云产业投资股份有限公司 Equipment and method for producing high-bulk anti-myopia paper
US20220105450A1 (en) * 2013-11-08 2022-04-07 Andrew R. Hicks Rotary Vacuum and Screen System and Methods for Separating Solids and Liquids

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218034B1 (en) * 1985-08-19 1988-11-17 INTERATOM Gesellschaft mit beschränkter Haftung Purification of filter plates
FI88536C (en) * 1987-07-02 1995-05-24 Ahlstroem Oy Foerfarande och anordning Foer pumpning av hoegkonsistent massa

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE251932C (en) *
US485983A (en) * 1892-11-08 Construction and laying of subaqueous tunnels
US1012974A (en) * 1911-05-15 1911-12-26 Charles S Bird Pulp-saver.
US1212978A (en) * 1916-09-30 1917-01-16 Joseph E Malone Pulp saving and washing machine.
US1446448A (en) * 1921-06-06 1923-02-27 John W Brown Continuously-operating air-pressure filter
US1826361A (en) * 1930-03-17 1931-10-06 Andale Co Rotary strainer
GB397471A (en) * 1932-02-13 1933-08-14 Serck Radiators Ltd Improvements relating to oil and other liquid or fluid filters
US2268788A (en) * 1939-02-24 1942-01-06 Socony Vacuum Oil Co Inc Method of operating wax filters
US2310587A (en) * 1942-07-24 1943-02-09 George L Macneill Self-cleaning strainer
US2379754A (en) * 1940-08-01 1945-07-03 Standard Oil Dev Co Method of washing rotating drum filters

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430135A (en) * 1943-10-20 1947-11-04 Alpha Cellulose Corp Pulp washer

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE251932C (en) *
US485983A (en) * 1892-11-08 Construction and laying of subaqueous tunnels
US1012974A (en) * 1911-05-15 1911-12-26 Charles S Bird Pulp-saver.
US1212978A (en) * 1916-09-30 1917-01-16 Joseph E Malone Pulp saving and washing machine.
US1446448A (en) * 1921-06-06 1923-02-27 John W Brown Continuously-operating air-pressure filter
US1826361A (en) * 1930-03-17 1931-10-06 Andale Co Rotary strainer
GB397471A (en) * 1932-02-13 1933-08-14 Serck Radiators Ltd Improvements relating to oil and other liquid or fluid filters
US2268788A (en) * 1939-02-24 1942-01-06 Socony Vacuum Oil Co Inc Method of operating wax filters
US2379754A (en) * 1940-08-01 1945-07-03 Standard Oil Dev Co Method of washing rotating drum filters
US2310587A (en) * 1942-07-24 1943-02-09 George L Macneill Self-cleaning strainer

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3074561A (en) * 1957-12-02 1963-01-22 Merz Engineering Inc Filtering mechanism
US3131145A (en) * 1962-03-12 1964-04-28 Rosaen Filter Co Fluid filtering device
US3275151A (en) * 1965-07-19 1966-09-27 S P Kinney Engineering Inc Disc-type strainer
US3425557A (en) * 1966-04-04 1969-02-04 Universal Filters Inc Backwash means for dual filter elements
US3994810A (en) * 1975-07-28 1976-11-30 Brunswick Corporation Onstream backflush filter
US4376705A (en) * 1980-09-19 1983-03-15 Nippon Dyeing Machine Manufacturing Co. Ltd. Filtering and drying apparatus
US4582603A (en) * 1983-12-24 1986-04-15 Taprogge Gesellschaft Mbh Apparatus for the mechanical cleaning of a cold-water stream
US4867879A (en) * 1984-05-25 1989-09-19 Taprogge Gesellschaft Mbh Pipeline sieve with a suction removal device
US6666976B2 (en) 1998-01-28 2003-12-23 James Benenson, Jr. Self cleaning water filter
US20040159617A1 (en) * 1998-01-28 2004-08-19 James Benenson Self-cleaning water filter
US20030052067A1 (en) * 1998-01-28 2003-03-20 James Benenson Self-cleaning fuel oil strainer
US20030111430A1 (en) * 1998-01-28 2003-06-19 James Benenson Self cleaning water filter
US6177022B1 (en) 1998-01-28 2001-01-23 James Benenson, Jr. Self-cleaning fuel oil strainer
US6676834B1 (en) 1998-01-28 2004-01-13 James Benenson, Jr. Self-cleaning water filter
US6712981B2 (en) 1998-01-28 2004-03-30 James Benenson, Jr. Method of cleaning a cylindrical water strainer utilizing reverse flow and ultrasonic energy
US6517722B1 (en) 1998-01-28 2003-02-11 James Benenson, Jr. Self cleaning fuel oil strainer
US6821444B2 (en) 1998-01-28 2004-11-23 James Benenson, Jr. Self-cleaning fuel oil strainer
US6861004B2 (en) 1998-01-28 2005-03-01 James Benenson, III Self-cleaning water filter
US20080173594A1 (en) * 2004-05-23 2008-07-24 Rosenmund Vta Ag Method and Device For Removal of Residual Products
US7473375B2 (en) * 2004-05-23 2009-01-06 Rosenmund Vta Ag Method and device for removal of residual products
DE102011107043A1 (en) * 2011-07-09 2013-01-10 Sergio Brandolisio Filter device and method
US20220105450A1 (en) * 2013-11-08 2022-04-07 Andrew R. Hicks Rotary Vacuum and Screen System and Methods for Separating Solids and Liquids
CN111005252A (en) * 2019-12-20 2020-04-14 中冶美利云产业投资股份有限公司 Equipment and method for producing high-bulk anti-myopia paper
CN111005252B (en) * 2019-12-20 2021-08-03 中冶美利云产业投资股份有限公司 Equipment and method for producing high-bulk anti-myopia paper

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