US3792656A - Pressing device for the removal of water from cellulose or the like - Google Patents

Pressing device for the removal of water from cellulose or the like Download PDF

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Publication number
US3792656A
US3792656A US00238450A US3792656DA US3792656A US 3792656 A US3792656 A US 3792656A US 00238450 A US00238450 A US 00238450A US 3792656D A US3792656D A US 3792656DA US 3792656 A US3792656 A US 3792656A
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United States
Prior art keywords
rollers
dehydrated
pairs
press
pressing station
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Expired - Lifetime
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US00238450A
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English (en)
Inventor
O Heissenberger
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Andritz AG
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Andritz AG
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Publication date
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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
    • B30B9/24—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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • D21F1/80—Pulp catching, de-watering, or recovering; Re-use of pulp-water using endless screening belts

Definitions

  • ABSTRACT Foreign Application Pri it D t This invention relates to an improvement in a pressing Apr. 5 1971 Austria 2890/71 device for the removal of water from nd materials particularly cellulose or similar fibrous material, com- 52 US. on /118, 100/154, 162/358 prising a Preliminary Pressing Swim and a mm 51 Int. (:1 B30b 9/24, B30b 5/04 Pressing Station including Pairs PP' and lower 58 Field of Search 100/151-154 horizontal rollers between which a Sheet Web Of 119 material to be dehydrated is passed, on a sieve 01' be- 314 5 3, 5 5 51 144/581 tween two sieves.
  • the improvement comprises a lower roller mounted ahead of the paired upper rollers in a [56] References Cited staggered manner in the traveling direction of the UNITED STATES PATENTS sieve, in at least one of said preliminary and main pressing stations. 403,744 5/1889 Flood 162/314 502,523 8/1893 Lockstaedt 100/151 9 Claims, 2 Drawing Figures 1 D l a ⁇ v 15 I
  • PAIENTED EB 1 Sam 1 0r 2 PRE S SING DEVICE FOR THE REMOVALOF WATER FROM CELLULOSE OR THE LIKE large extent is further dehydrated between pairs of rollers in a preliminary squeezing station and in a main pressing or squeezing station.
  • the present invention has the object of counteracting this disadvantage.
  • the lower roller of one pair of rollers is arranged or offset ahead, compared with or with respect to the upper rollerthereof in the direction of travel of the sieve.
  • the upper roller is set back as compared with and with respect to the lower roller and the sheet or web of material is pressed against the upper roller only by means of the sieve, and will be squeezed out only later in the roller gap between the upper roller and the lower roller, the danger of a penetration into the sheet of water being pushed back by the upper roller is increased, such that part of the improvement of the drainage or dehydration which has been achieved by the forwardly-shifted setting or arrangement of the lower roller is again canceled out.
  • This phenomenon may be counteracted, in accordance with the present invention, in that, in the preliminary pressing or squeezing station and/or in the main pressing or squeezing station, the sheet of material is guided in an ascending fashion, and transverse channels are disposed in front of the upper rollers, whose front edges touch the sheet of material or the upper sieve.
  • the front edges of the transverse channels preferably extend into the catchment gap of the upper rollers.
  • the forward setting or arrangement of the lower rollers may be so selected, for example, that the resulting looping angle of the upper roller in the preliminary pressing or squeezing station amounts to 5 20, preferably approximately I0", and in the main pressing or squeezing station 10 45, preferably approximately 30.
  • the present invention is primarily suitable for the removal of water from cellulose or similar fibrous material; but it also may be employed for the removal of water from non-fibrous substances, such as for example mud, or foodstuffs.
  • FIG. 1 is a view of a cellulose dehydrating machine
  • FIG. 2 illustrates the preliminary pressing or squeezing station and the main pressing or squeezing station at an enlarged scale.
  • the fibrous material to be dehydrated is conveyed or fed between two endless sieves, namely the lower sieve l and the upper sieve 2, to the cellulose dehydrating machine.
  • Reference numeral 3 designates the sheet or web of material to be dehydrated or freed from water.
  • the sheet of material 3 passes first through the wet portion or station A in which the water is suctioned off, and then travels into or reaches the registering portion or station B in which a first squeezing-out of the moisture is effected between pairs of rollers. Thereupon, the material passes into the preliminary pressing or squeezing station C where a further squeezing-out of the water takes place between pairs of rollers. In the adjacent main pressing or squeezing station D, the liquid is squeezed out between two rollers, with a great amount of pressure, up to an admissible residual part.
  • FIG. 2 illustrates the preliminary pressing or squeezing station C and the main pressing or squeezing station D at an enlarged scale.
  • the sheet or web of material 3 positioned between the lower sieve l and the upper sieve 2 is passed through between the pairs of rollers 6, 7 in the preliminary pressing or squeezing station C.
  • the lower roller has been identified therein with reference numeral 6 while the upper roller has been identified with reference numeral 7.
  • the lower rollers 6 are mounted ahead or forwardly offset as compared with and with respect to the coordinated upper rollers 7 in the traveling direction of the sieve, as indicated by the arrow 8.
  • the material rests against the upper roller 7 within the area between the roller gap 9 and the running-up point 10, which will result in a looping angle or around the upper roller.
  • This looping angle a is between 5 and 20, depending upon the extent of the forwardly shifted or staggered arrangement of the lower roller, and preferably may amount to approximately 10.
  • transverse channels 11 are provided for whose front edges 12 touch the sheet of material 3 and/or the upper sieve 2, if the latter is employed.
  • the water being held back or dammed up on the upper side of the sheet of material 3, and respectively the upper sieve 2 is laterally carried off, and a penetration thereof into the sheet of material 3 is thus prevented.
  • the front edges 12 of the transverse channels 11 extend into the catchment gap 13 of the upper rollers, as indicated in the drawings.
  • the lower main squeezing or pressing roller 14 mounted ahead or pre-set as compared to the upper main pressing or squeezing roller 15 in the traveling direction 8 of the sheet of material 3.
  • the roller gap between the lower roller 14 and the upper roller 15 has been designated with reference numeral 16 whereas the running-up point of the upper sieve 2 and, respectively, the sheet of material 3 on the upper roller has been identified with reference numeral 17.
  • This looping angle B may be from to 45 and preferably is approximately 30.
  • a press for dehydrating materials including a preliminary pressing station and a main pressing station in which the material to be dehydrated is passed through a sieve or between two sieves and between at least two pairs of horizontally-disposed rollers defining at least one of said preliminary pressing station and said main pressing station and each consisting of an upper roller and a lower roller, the improvement comprising each successive pair of said pairs of rollers, with respect to the direction of the path of travel of said material to be dehydrated, being disposed at a height greater than the height of the next previous pair of said pairs of rollers in a manner to form a gradually ascending path of travel of said material to be dehydrated which forms an acute angle with a horizontal plane and said lower roller of each of said pairs of rollers being offset from andforward of said upper roller of said pair of rollers, with respect to said direction of travel of said material to be dehydrated, to form an acute angle a between a line through the center of said upper roller and perpendicular to said material to be dehydrated and a line
  • trough means are disposed behind the upper rollers of the pairs of rollers, with respect to the direction of travel of the material to be dehydrated, and the front edges of said trough means are in contact with one of said material to be dehydrated and an upper sieve of the two sieves.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
US00238450A 1971-04-05 1972-03-27 Pressing device for the removal of water from cellulose or the like Expired - Lifetime US3792656A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT289071A AT313044B (de) 1971-04-05 1971-04-05 Presse für die Entwässerung von Stoffen, insbesondere Zellstoff od.dgl. Fasermaterial

Publications (1)

Publication Number Publication Date
US3792656A true US3792656A (en) 1974-02-19

Family

ID=3541920

Family Applications (1)

Application Number Title Priority Date Filing Date
US00238450A Expired - Lifetime US3792656A (en) 1971-04-05 1972-03-27 Pressing device for the removal of water from cellulose or the like

Country Status (11)

Country Link
US (1) US3792656A (enrdf_load_stackoverflow)
JP (1) JPS5319202Y2 (enrdf_load_stackoverflow)
AT (1) AT313044B (enrdf_load_stackoverflow)
CA (1) CA963720A (enrdf_load_stackoverflow)
CH (1) CH530811A (enrdf_load_stackoverflow)
DD (1) DD95755A5 (enrdf_load_stackoverflow)
DE (1) DE2150793C3 (enrdf_load_stackoverflow)
FR (1) FR2133432A5 (enrdf_load_stackoverflow)
GB (1) GB1379954A (enrdf_load_stackoverflow)
IT (1) IT952470B (enrdf_load_stackoverflow)
SE (1) SE385928B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218970A (en) * 1978-02-17 1980-08-26 Maschinenfabrik Andritz Aktiengesellschaft Compression rollers for dehydration equipment
US4909851A (en) * 1982-07-31 1990-03-20 Ciba-Geigy Corporation Pigment compositions
US6676807B2 (en) * 2001-11-05 2004-01-13 Kimberly-Clark Worldwide, Inc. System and process for reducing the caliper of paper webs
CN100389953C (zh) * 2004-09-22 2008-05-28 泉州市丰泽华兴建筑机械设备有限公司 固液分离机
US20100032384A1 (en) * 2008-08-07 2010-02-11 William Harris Moss Method for improving belt press dewatering

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60176897U (ja) * 1984-04-25 1985-11-22 市川毛織株式会社 汚泥の脱水装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US403744A (en) * 1889-05-21 Joseph t
US502523A (en) * 1893-08-01 Press
US714679A (en) * 1902-02-27 1902-12-02 Levi B Eberly Belt-and-roller press.
US1483562A (en) * 1921-02-14 1924-02-12 Karlstad Mekaniska Ab Rotary pressing apparatus
US2783689A (en) * 1954-02-22 1957-03-05 Helge N Skoldkvist Arrangement for removing of water in press section of machines for forming a felted pulp web
US3274924A (en) * 1965-11-29 1966-09-27 Walker Douglas Pringle Apparatus for dewatering pulpy material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US403744A (en) * 1889-05-21 Joseph t
US502523A (en) * 1893-08-01 Press
US714679A (en) * 1902-02-27 1902-12-02 Levi B Eberly Belt-and-roller press.
US1483562A (en) * 1921-02-14 1924-02-12 Karlstad Mekaniska Ab Rotary pressing apparatus
US2783689A (en) * 1954-02-22 1957-03-05 Helge N Skoldkvist Arrangement for removing of water in press section of machines for forming a felted pulp web
US3274924A (en) * 1965-11-29 1966-09-27 Walker Douglas Pringle Apparatus for dewatering pulpy material

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218970A (en) * 1978-02-17 1980-08-26 Maschinenfabrik Andritz Aktiengesellschaft Compression rollers for dehydration equipment
US4909851A (en) * 1982-07-31 1990-03-20 Ciba-Geigy Corporation Pigment compositions
US6676807B2 (en) * 2001-11-05 2004-01-13 Kimberly-Clark Worldwide, Inc. System and process for reducing the caliper of paper webs
CN100389953C (zh) * 2004-09-22 2008-05-28 泉州市丰泽华兴建筑机械设备有限公司 固液分离机
US20100032384A1 (en) * 2008-08-07 2010-02-11 William Harris Moss Method for improving belt press dewatering
US7964105B2 (en) * 2008-08-07 2011-06-21 William Harris Moss Method for improving belt press dewatering

Also Published As

Publication number Publication date
JPS5319202Y2 (enrdf_load_stackoverflow) 1978-05-22
DE2150793C3 (de) 1975-07-03
GB1379954A (en) 1975-01-08
DD95755A5 (enrdf_load_stackoverflow) 1973-02-12
FR2133432A5 (enrdf_load_stackoverflow) 1972-11-24
DE2150793A1 (de) 1972-11-23
AT313044B (de) 1974-01-25
JPS5293704U (enrdf_load_stackoverflow) 1977-07-13
SE385928B (sv) 1976-07-26
DE2150793B2 (de) 1974-11-28
CA963720A (en) 1975-03-04
IT952470B (it) 1973-07-20
CH530811A (de) 1972-11-30

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