US3929061A - Water extraction method and apparatus - Google Patents

Water extraction method and apparatus Download PDF

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Publication number
US3929061A
US3929061A US547059A US54705975A US3929061A US 3929061 A US3929061 A US 3929061A US 547059 A US547059 A US 547059A US 54705975 A US54705975 A US 54705975A US 3929061 A US3929061 A US 3929061A
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United States
Prior art keywords
chamber
moisture
press
pulp
elements
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Expired - Lifetime
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US547059A
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English (en)
Inventor
David Dugmore Banks
Francis Mcmanus
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LEF BISHOP Ltd
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Scapa Engineering Ltd
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Assigned to LEF BISHOP LIMITED reassignment LEF BISHOP LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SCAPA ENGINEERING LIMITED
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
    • B30B9/06—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams co-operating with permeable casings or strainers

Definitions

  • ABSTRACT Apparatus and method for extracting water from pulp and of providing a pressed block of pulp said apparatus comprising a press chamber, opposed moisture permeable press elements at respective opposite ends of said chamber, feed means adapted to introduce a predetermined quantity of moisture containing material into the chamber, the press chamber being movable between a first position wherein the opposed moisture permeable elements are arranged in generally vertically spaced relationship, and a second position wherein the said elements are in generally horizontally spaced relationship, in which position the pressed block is discharged from the press chamber.
  • the method includes the steps of constraining the pulp between the opposed moisture-permeable elements, pressing the pulp to extract moisture therefrom whilst the chamber is disposed horizontally, and ejecting the resultant pressed black from the chamber.
  • WATER EXTRACTION METHOD AND APPARATUS The invention concerns water extraction methods, and apparatus for use in practising the same.
  • waste disposal systems One of the problems encountered in waste disposal systems is the difficulty in handling and storing the pulped waste, particularly where this has a relatively high reclaim value, such as waste paper, a typical instance being used trading stamps which have to be pulped for security reasons and in connection with which normal baling or incineration is an unacceptable alternative.
  • stamps when pulped for destruction, still contain about 80 percent water by weight and a denser bulk with lower moisture content is desirable. It is convenient to reduce the pulp to blocks or bricks which can be easily handled and stacked neatly for storage.
  • the primary object of the present invention is to provide a method of and a means for pressing pulp into block form.
  • a method of extracting water from pulp and of providing a pressed block of pulp includes the steps of charging a generally vertically disposed press chamber from above with moisture-containing pulp, constraining the pulp between opposed moisture permeable elements arranged at the top and bottom of the said chamber, rotating the press chamber from its generally vertical disposition into a generally horizontal disposition, pressing the pulp to extract moisture therefrom whilst the chamber is disposed horizontally, and ejecting the resultant pressed block from the chamber.
  • the constraining of the pulp between the opposed moisture permeable elements may be accompanied by an initial moisture extraction step.
  • the invention also includes apparatus for practising the method as aforesaid which comprises a press chamber, opposed moisture permeable elements at respective opposite ends of the said chamber, at least one such element being movably mounted for adjustment relative to the other element to vary the separation of the elements for providing access to the chamber in the direction of movement of the element and for compressing material positioned between the said elements, and feed means adapted to introduce a predetermined quantity of moisture-containing material into the chamber for support by that moisture-permeable element arranged in opposed disposition relative to the aforementioned such element, the said press chamber being movable between a first position wherein the opposed moisture-permeable elements are arranged in generally vertically spaced relationship, in which position the chamber is charged with moisture containing material, and a second position wherein the said elements are in generally horizontally spaced relationship,
  • said tray is aligned with the chute, and a discharge position, wherein the tray is aligned with the press chamber.
  • a plurality of press chambers will be provided in side-byside disposition there being respective moisture-permeable elements and feed means for each such press chamber.
  • FIG. 1 is an end elevation, partly in section, of a multiple-position press means constructed in accordance with the present invention
  • FIG. 2 is a front elevation of theapparatus shown in FIG. 15 v r
  • FIG. 3 is a plan view of the multiple position press means of FIGS. 1 and 2 and I g
  • FIG. 4 is a diagrammatic illustration, drawn to a larger scale, of a typical moisture-permeable element as used in the apparatus.
  • apparatus for extracting moisture from moisture-containing materials comprises a plurality of press units 11 arranged in banks at opposite sides of a machine framework 12, the said press-units 11 being connected with a common supply hopper 13, as will hereafter become apparent.
  • the press-units 11 are of a like kind and each consists of a sleeve-like press-chamber body 14 of generally rectangular transverse cross-section mounted for pivotal motion about a horizontal axis 1-5 under the control of a piston and cylinder means 16 coupled between a fixed point 17 on the machine framework 12 and a lug 18 mounted on the said body 14, the press-chamber body 14 having a press-chamber 19 therein, two pressplates 20, 21 arranged in opposed disposition and movable axially of the press body under the control of respective piston and cylinder means 22, 23, and a feed means 24 including a feed tray 25 adapted to receive material to be pressed from a supply thereof and to deliver the same to the press-chamber.
  • each press-unit 11 is initially arranged with the axis of the press-chamber 19 thereof arranged generally vertically, the press-plates 20, 21 being in vertically spaced opposed disposition and respectively defining the top and the bottom of the press-chamber.
  • the upper press-plate 20, as seen in FIG. 1, is movable into or out of engagement with the top of the presschamber body 14, whilst the lower press-plate 21 is movable axially of such body to compress material within the press-chamber 19 against the upper press-plate 20.
  • Each press-plate 20, 21 is of the form shown diagrammatically in FIG. 4, and comprises a hollow body 26 of a transverse cross-section to correspond with that of the press-chamber, the front face 26a of the plate being provided with apertures 27 therein for drainage purposes and being covered by a suitable filter element 28 secured to the body in any convenient manner.
  • the apertures 27 are inclined such that with the unit 11 pivoted so that the axis of the filter chamber is generally horizontal the apertures are inclined downwardly and inwardly of the hollow body.
  • a drainage opening 29 is provided at the bottom of the hollow body.
  • the feed means 24 for each unit comprises a generally vertical feed chute 30 extending downwardly from the common hopper 13, the feed tray 25 aforesaid which is movable to or from alignment with the chute 30 at the lower end thereof, a closure means 31 formed register with the feed chute 30 into alignment with the integrally with the-tray and movable therewith to close the lower end of the chute as the tray is moved away from its position of alignment therewith, and a piston and cylinder arrangement 32 adapted to move the tray between its position of alignment with the chute 30 and a position of alignment with the press-chamber 19.
  • the tray 25 is open-bottomed and moves in contact 'witha fixed, horizontal support surface 33, the said surface extending to a position directly adjacent to the press-chamber body 14 and in horizontal alignment with the top of the press-chamber.
  • the transverse cross-sectional dimensions of the tray correspond to those of the lower end of the feed chute 30, which feed chute is of increasing cross-section towardsits lower end, and the capacity of the tray is selected having regard to the volume of the presschamber and to thesize of the charge to be fed thereto.
  • the closure means 31 comprises a plate extending rearwardly from the tray and in horizontal alignment withi the top thereof, the said plate having a cutting edge 34 at its forward extremity to preclude trapping of material under processing between the front lower edge of the chute 35 and the corresponding rear upper edge 36 of the 'tray'.
  • a cutting edge could be providedat the from lower edge of the chute.
  • the piston and cylinder means 32 is supported on the machine framework in horizontal disposition, partially underlying the plate defining the closure means 31 aforesaid, and the piston 37 thereof is secured to a lug 38 extending rearwardly from the back of the tray.
  • Actuation of the piston and cylinder means 32 serves to move the tray 25 forwardly from its position of alignment with the lower end of the chute across the top of the press-chamber and into alignment therewith.
  • the open bottom of the tray is put in communication with the press-chamber and the contents of the tray fall, under gravity, into the chamber, the flowability characteristics of the material under processing being such that there is no significant forward movement of the contents of the tray, and thus no continuing filling of the tray, as the material falls into the chamber.
  • a conveyor means 40 is provided in front of each of the banks of press-units l l, the said conveyor means 40 serving to receive blocks 41 ejected from the presschamber and to transfer the same for collection and disposal.
  • the conveyor means 40 is of generally open-work form to allow of the ready drainage of water falling thereon from the unit upon the pivoting thereof back to its vertical disposition.
  • the uppermost press-plate 20 is retracted to provide for the movement of the tray across the top of the chamber, whilst the lowermost press-plate 21 is at the bottom of the chamber so as to form a closure thereto.
  • the uppermost press-plate 20 On retraction of the tray, the uppermost press-plate 20 is moved downwardly under the control of its piston and cylinder means 22 into engagement with the top of the press-chamber body 14, thus to close the chamber 19, and the unit 11 is pivoted forwardly, to the dotted position shown, by actuation of the piston and cylinder means 16. Actuation of the piston and cylinder means 23 of the lower press-plate 21 axially of the presschamber 19 to compress the material therein. Expressed moisture passes through the filter elements 28 at the front faces of the press-plates to the interior of the hollow bodies 26 which define. such plates, and drains from such bodies through the drainage openings 29 therein. 5
  • the upper pressure-plate 20 is retracted and the lower press-plate 21 ejects the block 41 of compressed, dewatered pulp onto the conveyor.
  • the unit-11 is moved back to its generally vertical disposition after the block 41 has been moved along the conveyor 40 and out of register with the unit, any water draining from the faces of the press-plates during the pivoting motion thereof passing through the reticulate conveyor and thereby away from the pressed blocks.
  • the feed tray will have been recharged from the hopper, and the cycle of operation is repeated.
  • each bank of press units is pivoted between vertical and horizontal positions by a respective common piston and cylinder means.
  • the feed hopper comprises an annular bottom plate 42 having an upstanding wall 43 about the periphery thereof, a rotatable cone-shaped core 44 to the hopper arranged coaxially with the bottom plate 42, and a plurality of paddles 45 secured to the core 44 and extending generally radially thereof.
  • the bottom plate, 42 is apertured in register with the tops of the feed chutes, the apertures 46 being in two banks of four, to correspond to the banks of pressunits.
  • the cone-shaped core 44 is mounted on suitable support means 47 for rotation about the axis of the cone, and a drive means 48 is provided to effect such rotation.
  • the paddles 45.are .of cranked form the upper region 45a beingsecured to the core and the lower, or blade region 45b extending across the trough to sweep the bottom thereof.
  • the blade region At its lower edge the blade region has nylon brushes, not shown, in contactwith the bottom of the trough.
  • the invention in connection with a multiple-chamber machine, a single chamber arrangement may be found adequate in some cases. If a multiple-chamber machine is required, then the chambers may be arranged other than in banks. If required, the units may be angularly spaced about a common centre and pivoted individually. The units may be operated in sequence, if desired.
  • a method of extracting water from pulp and of providing a pressed block of pulp including the steps of charging a generally vertically disposed press-chamber from above with moisture-containing pulp, constraining the pulp between opposed moisture-permeable elements arranged at the top and bottom of the said chamber, rotating the press-chamber from its generally vertical disposition into a generally horizontal disposition, pressing the pulp to extract moisture therefrom whilst the chamber is disposed horizontally, and ejecting the resultant pressed block from the chamber.
  • Apparatus for extracting water from pulp and of providing a pressed block of pulp comprising a presschamber, opposed moisture-permeable elements at respective opposite ends of the said chamber, at least one such element being movably mounted for adjustment relative to the other element to vary the separation of the elements for providing access to the chamber in the direction of movement of the element and for compressing material positioned between the said elements, and feed means adapted to introduce a predetermined quantity of moisture-containing material into the chamber for support by that moisture-permeable element arranged in opposed disposition relative to the aforementioned such element, the said press-chamber being movable between a first position wherein the opposed moisture-permeable elements are arranged in generally vertically spaced relationship, in which position the chamber is charged with moisture-containing material, and a second position wherein the said elements are in generally horizontally spaced relationship, in which position the pressed block is discharged from the chamber.
  • both moisture-permeable elements are movable in the axial direction the the press-chamber, that element defining the bottom of the chamber in the vertical mode of the chamber being adapted to eject the pressed block from the chamber on completion of the pressing operation.
  • the feed means comprises a filling tray movable transversely of a feed chute between a load position, wherein the said tray is aligned with the chute, and a discharge position, wherein the tray is aligned with the press-chamber, the said tray being adapted to receive moisture-containing material from the feed chute.
  • the tray further includes a closure means cooperable with the feed chute for sealing the same in the discharge position of the tray.
  • each moisture-permeable element comprises a hollow body having an apertured front face thereto and a filter element extending across the said front face.
  • Apparatus as claimed in claim 3 including a plurality of press-chambers and respective moisturepermeable elements and feed means therefor.
  • Apparatus as claimed in claim 13, including a common hopper to which the individual said feed means are connected.
  • Apparatus as claimed in claim 14 including a rotator arranged co-axially with and rotatable relative to the said hopper, the said rotator comprising a cone shaped core and a plurality of paddles extending radially outwardly thereof, the said paddles being shaped and dimensioned to displace material lying on the floor of the hopper on rotation relative to the hopper.
  • Apparatus as claimed in claim 3, further including pressure fluid operated piston and cylinder means adapted for effecting movement of the or each presschamber between first and second positions thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Treatment Of Sludge (AREA)
US547059A 1974-02-08 1975-02-04 Water extraction method and apparatus Expired - Lifetime US3929061A (en)

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Application Number Priority Date Filing Date Title
GB597074A GB1454952A (en) 1974-02-08 1974-02-08 Water extraction method and apparatus

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US (1) US3929061A (ja)
JP (1) JPS50142469A (ja)
CA (1) CA1014414A (ja)
GB (1) GB1454952A (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0016271A1 (en) * 1978-03-22 1980-10-01 Signet Corporation Process and apparatus for consolidating an aqueous coal slurry and obtaining clean water. Slugs obtained by consolidating the coal slurry
US4232600A (en) * 1976-12-06 1980-11-11 Societe Civile Hydromer Process and apparatus for treating matter comprising a solid phase and a liquid or pasty phase
US4303412A (en) * 1979-03-27 1981-12-01 Baikoff Eugene M A Method and apparatus for compressively separating waste material
US5251552A (en) * 1991-06-11 1993-10-12 Jacques Gourdol Press for heterogeneous waste
FR3032907A1 (fr) * 2015-02-19 2016-08-26 Environnemental Sediments Treat Presse de traitement de sediments preleves sur un fond d'un milieu aqueux
CH711512A1 (de) * 2015-09-10 2017-03-15 Dissolvetech Ag Entwässerungsverfahren.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151939A (en) * 1983-11-28 1985-07-31 Dravo Corp Apparatus and process for the dewatering of fine granular materials

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US761686A (en) * 1902-02-08 1904-06-07 Michael Kirshner Apparatus for extracting oil.
US1771526A (en) * 1923-12-26 1930-07-29 Fred S Carver Filter and fluid-eduction means for presses
US3501890A (en) * 1966-11-07 1970-03-24 Hunt Co J B Method and apparatus for packaging compressible material
US3722403A (en) * 1969-10-29 1973-03-27 Int Dynetics Corp Compacting apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US761686A (en) * 1902-02-08 1904-06-07 Michael Kirshner Apparatus for extracting oil.
US1771526A (en) * 1923-12-26 1930-07-29 Fred S Carver Filter and fluid-eduction means for presses
US3501890A (en) * 1966-11-07 1970-03-24 Hunt Co J B Method and apparatus for packaging compressible material
US3722403A (en) * 1969-10-29 1973-03-27 Int Dynetics Corp Compacting apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232600A (en) * 1976-12-06 1980-11-11 Societe Civile Hydromer Process and apparatus for treating matter comprising a solid phase and a liquid or pasty phase
EP0016271A1 (en) * 1978-03-22 1980-10-01 Signet Corporation Process and apparatus for consolidating an aqueous coal slurry and obtaining clean water. Slugs obtained by consolidating the coal slurry
US4303412A (en) * 1979-03-27 1981-12-01 Baikoff Eugene M A Method and apparatus for compressively separating waste material
US5251552A (en) * 1991-06-11 1993-10-12 Jacques Gourdol Press for heterogeneous waste
FR3032907A1 (fr) * 2015-02-19 2016-08-26 Environnemental Sediments Treat Presse de traitement de sediments preleves sur un fond d'un milieu aqueux
CH711512A1 (de) * 2015-09-10 2017-03-15 Dissolvetech Ag Entwässerungsverfahren.

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GB1454952A (en) 1976-11-10
CA1014414A (en) 1977-07-26
JPS50142469A (ja) 1975-11-17

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AS Assignment

Owner name: LEF BISHOP LIMITED, UNITED KINGDOM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SCAPA ENGINEERING LIMITED;REEL/FRAME:005211/0235

Effective date: 19890914