US3126819A - Wehner - Google Patents

Wehner Download PDF

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Publication number
US3126819A
US3126819A US3126819DA US3126819A US 3126819 A US3126819 A US 3126819A US 3126819D A US3126819D A US 3126819DA US 3126819 A US3126819 A US 3126819A
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United States
Prior art keywords
housing
band
drum
partitions
spaced
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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English (en)
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/10—Screens in the form of endless moving bands
    • 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
    • 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
    • B30B9/24—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 an endless pressing band
    • B30B9/242—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 an endless pressing band comprising compartments which are recurrently constricted and expanded

Definitions

  • the invention starts from a known construction of an endless dewatering band in which the continuously moved band surface is subdivided by partitions which fold down to form ⁇ a succession of troughs.
  • the lateral shutting of of these troughs is effected by a stationary housing in which Ithe band runs while closing them.
  • These foldable partitions 'are pressed progressively on to the band surace by stationary guides which 'approach the band in its running direction, while lat the same time squeezing together and effecting further dew-atering of the material which is present in the troughs and which has previously undergone some dewatering through the permeable band surface.
  • This known construction of -a dewatering band is improved by the present invention as regards the etliciency achievable 'both quantitatively ⁇ and as regards the degree of dewatering lachieved, and its possible uses are widened by a simpliication of the entire construction.
  • the invention provides the possibility of exerting on the partly dewatered solid constituents of the sludge a pressure effect which is considerably better than with the hitherto known bands, and above all of simplifying and making reliable the process of emptying the trough compartments which in the known arrangements was difficult and did not always proceed with the desired completeness.
  • This method of guiding the outer bands is possible in a specially simple Way, as in the known construction, by impressing vibrations on the band in a direction transversely to its plane by appropriate arrangement or construction of the said guide rollers, or alternatively by using cams or the like, by which the course of the dcwatering process is promoted.
  • the inner band may also be led over, or be provided with, such cams or the like for producing vibrations.
  • the entirely closed construction lof the compartments makes it possible, in contr-ast to the known construction, to 'allow the band to run on edge about a veri arent tical drum or combination of drums. There is then obtained an entirely new possibility for discharging the dewatered material, which can now take place by the action of gravitational force for which purpose nothing else is necessary than the provision of discharge openings in the housing at a suitable place 'at which the re-erection of the compartments has taken place after passing the guides which fold down the pocket walls.
  • the parti-tions and also the upper covers of the compartments consist of rigid material
  • they may be provided in a specially advantageous Way with spring inserts which Iact to assist the -re-.crection of the partitions and consequently the opening up of the compartments.
  • the same result can be achieved by providing the side edges of the partitions with lugs which engage with guide rails or grooves in the housing wall in recesses of the partitions which follow such a course that the partitions are successively erected.
  • the inner band like the outer band, may consist Iof a material which is rigid in lateral direction but exible, as for example spring sheet steel. It is then necessary to provide sealing means at the side edges of the bands against the housing. Such seals, which for the purpose may be made lip-like, are also necessary especially between the horizontal walls of the housing and the edges of the walls of the compartments which slide along inside them.
  • the whole arrangement is mounted on a permeable bottom plate of the housing so that water can leave at any point.
  • the drum, the housing, or the drum and the housing may also be made permeable.
  • the band preferably runs over two spaced drums, one of which is driven.
  • the pressure producing a dewatering action which is eX- erted on the material in the pockets during the phase while the pocket spaces are passing the constricted region, can be regulated by making at least one drum displaceable in the ⁇ lateral direction so that it can bc moved towards or away from the wall of the housing concerned.
  • the drum running in this region with a resilient mounting in known manner.
  • the outer guide wall may be made springily flexible.
  • the dewatering effect can be improved by connecting the housing and/or the drum (which is then permeable) to a source of reduced pressure.
  • FIGURE 1 is a partly sectional side elevation of a rst embodiment of the new dewatering band
  • FIGURE 2 is a plan corresponding to FIGURE 1, and
  • FIGURE 3 is a view, similar to FIGURE 2, of a second embodiment.
  • I is the inner band, placed on edge, and 2 is the outer band also placed on edge. Partitions 3 between the bands 1 and 2 form, with the bands, compartments or pocket spaces 4.
  • the outer band 2 in the embodiment shown is guided on rollers 6 provided on the inner wall of the housing.
  • the inner band runs round the drum and a driven or guide roller 14 arranged at a distance therefrom.
  • the entire arrangement is surrounded by a housing 13 which in the region shown on the left in FIGURE 2 runs at first concentric to the drum 5 at a distance determined by the height of the partitions between the inner and outer bands so that the pocket spaces 4 here have a rectangular cross-section. Then this distance diminishes progressively to such an extent that, as may clearly be seen at d', in FIGURE 2, the pocket spaces passing the narrowing intermediate space are decreased to a minimum by progressive folding down of the partitions.
  • the distance between successive partitions remains always the same, i.e. the boundaries of the compartments carry out movements like the displacement of an articulated parallelogram.
  • the shaft '7 of the drum 5 may be laterally displaceable so that it may assume for example the positions 7 and 7 corresponding to a more or less diminished volumetric capacity of the collapsed pocket spaces during passage through the constriction'.
  • the numeral 12 merely indicates diagrammatically an apparatus which assists the action of gravity in the emptying of the compartments.
  • This apparatus may be means for producing a compressed air jet or an ejecting plunger.
  • FIGURE 3 shows the possibility of impressing'vibrations on a band constructed in principle in the same way as that above described, and in fundamentally the same way as is described in German printed application (DAS) No. 1,097,381.
  • the circumference of the drum 5 is given a cam-like profile and the inner band 1 has a corresponding counter-profile.
  • the numeral 16 indicates the flexible mounting of the drum-in the embodiment shown the support thereof by a spring-in consequence of which the gap in the region of the constriction automatically widens if a larger body passes through it.
  • the resiliently sprung construction of the housing wall in this region indicated at 17 serves the same purpose.
  • the filtering effect of the dewatering band according to the invention may be utilised in ⁇ a specially advantagous way by adding, in known manner, wetting and occulating agents to the sludge.
  • a dewatering apparatus a housing having at least spaced upper and lower walls and a side wall extending therebetween; a first drum mounted in said housing for rotation about a vertical axis; a second drum mounted in said housing for rotation about a vertical axis and spaced laterally from said first drum; a dewatering band fitting closely the upper and lower walls of said housing and extending over said drums, said band having a continuous inner member and an outwardly spaced continuous outer member, and a series of spaced partitions respectively connecting said inner and outer members; at least a portion of the peripheral surface of said first drum and an adjacent portion of the side wall of said housing defining a constricted region therebetween; said partitions being adapted to fold down progressively as said band is moved through the constricted region between said rst drum and an adjacent portion of the side wall of said housing and continuously between the upper and lower walls of said housing in sealing contact therewith, whereby the compartments formed by the partitions are closed by the side walls of said housing which positively guide the folding down movement of

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Treatment Of Sludge (AREA)
  • Paper (AREA)
US3126819D 1961-03-17 Wehner Expired - Lifetime US3126819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW29667A DE1153694B (de) 1961-03-17 1961-03-17 Entwaesserungsband

Publications (1)

Publication Number Publication Date
US3126819A true US3126819A (en) 1964-03-31

Family

ID=7599290

Family Applications (1)

Application Number Title Priority Date Filing Date
US3126819D Expired - Lifetime US3126819A (en) 1961-03-17 Wehner

Country Status (6)

Country Link
US (1) US3126819A (enrdf_load_stackoverflow)
BE (1) BE615172A (enrdf_load_stackoverflow)
DE (1) DE1153694B (enrdf_load_stackoverflow)
FR (1) FR1334325A (enrdf_load_stackoverflow)
GB (1) GB949698A (enrdf_load_stackoverflow)
NL (1) NL275918A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631794A (en) * 1970-04-22 1972-01-04 Albert Wehner Apparatus for condensing and squeezing a medium
US4062474A (en) * 1975-05-09 1977-12-13 Helma Lampl Apparatus for metered feeding of poorly flowable materials

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106992A1 (de) * 1981-02-25 1982-12-02 Nordischer Maschinenbau Rud. Baader GmbH + Co KG, 2400 Lübeck "presspassierverfahren fuer nahrungsmittel"

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2313996A (en) * 1938-09-26 1943-03-16 Clasinus P E Hoolhorst Drum press
DE1097381B (de) * 1955-12-30 1961-01-19 Albert Wehner Entwaesserungsband

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2313996A (en) * 1938-09-26 1943-03-16 Clasinus P E Hoolhorst Drum press
DE1097381B (de) * 1955-12-30 1961-01-19 Albert Wehner Entwaesserungsband

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631794A (en) * 1970-04-22 1972-01-04 Albert Wehner Apparatus for condensing and squeezing a medium
US4062474A (en) * 1975-05-09 1977-12-13 Helma Lampl Apparatus for metered feeding of poorly flowable materials

Also Published As

Publication number Publication date
NL275918A (enrdf_load_stackoverflow)
FR1334325A (fr) 1963-08-09
GB949698A (en) 1964-02-19
DE1153694B (de) 1963-09-05
BE615172A (fr) 1962-07-02

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