US3086454A - Continuously operating press apparatus - Google Patents

Continuously operating press apparatus Download PDF

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Publication number
US3086454A
US3086454A US15950A US1595060A US3086454A US 3086454 A US3086454 A US 3086454A US 15950 A US15950 A US 15950A US 1595060 A US1595060 A US 1595060A US 3086454 A US3086454 A US 3086454A
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United States
Prior art keywords
press
cylinder
members
liquid
drum
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Expired - Lifetime
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US15950A
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English (en)
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Asplund Arne Johan Arthur
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
    • 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
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
    • 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
    • B30B9/20—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 rotary pressing members, other than worms or screws, e.g. rollers, rings, discs
    • B30B9/207—Roller-and-ring presses

Definitions

  • the product desired to be recovered by the pressing operation may be constituted of either the liquid or the suspended solid material or both the liquid and the material.
  • This last-mentioned result is desired, for example, in the production of chemical or semi-chemical cellulose pulp wherein a suspension of fibers in water is formed which water also contains valuable chemicals. After separation of the two components said chemicals are recovered by an evaporation process.
  • one of the rotatable press members is mounted eccentrically within the other rotatable press member in such a manner as to form an interspace between said members having a crescent-shaped cross-section.
  • the shaft of the inner press member is displaced eccentrically in relation to the shaft of the outer press member and also in relation to the direction of relative rotation in such a manner as to cause the minimum interspace or the nip to be located above the horizontal plane through the first-mentioned shaft and on that side of the apparatus Where the members during rotation are moving upwards.
  • the two press members are radially displaceable relatively to one another in order to allow adjustment of the magnitude of the nip, and suitably the direction of the displacement is horizontal.
  • FIG. 3 is an end elevation of the press apparatus seen from the right to the left of FIG. 1, some parts of the apparatus being shown in section taken on line III-III of said figure.
  • FIG. 4 is a diagrammatic and part-sectional view of a device for adjustment of the position of the inner press member.
  • FIG. 5 is a sectional view similar to that shown in FIG. 2 through a press apparatus constructed according to a slightly modified embodiment of the invention.
  • reference numeral 10 denotes a casing or frame of a press enclosing two substantially cylindrical press members generally denoted by 12 and 14, respectively.
  • the inner member 12 will hereinafter be designated as the cylinder 12 and the outer member 14 as the drum 14.
  • the cylinder '12 is rigidly connected with centrally mounted journals 16 and 18, respectively, carrying bearings denoted by 20 and 21, respectively.
  • the drum 14 is supported externally by preferably three pairs of rolls 22, 24 and 26 adapted to co-operate with two bearing rings 28 shrunk on the external surface of the drum. The rolls are in pairs carried on shafts 29, 30
  • the cylinder 12 is mounted radially inside the drum 14, the mounting of both said parts being carried out in such a manner as to position their axes ecceutrically relatively to one another. They are driven to rotate in the same direction counter-clockwise according to the arrow 24 in FIGS. 2 and 5 with the same or possibly slightly different speeds of their circumferential screen surfaces which speed may be a few revolutions per minute. During this movement the spacing between two opposite points on their cylindrical surfaces varies and attains a maximum value at the so-calledgap indicated at 36 in FIGS. 2 and 5 and a minimum value at a diametrically opposite point the so-called nip 38.
  • a transmission member formed in the embodiment shown as a chain 40 passes over a sprocket 42 rigidly secured to the shaft 30 of the rolls 24.
  • a chain 46 passes so that two of the three pairs of rolls in the illustrated embodiments are driven.
  • the cylinder 12 is suitably driven from the same power source as the drum by means of a chain 48 passing over a sprocket 50 carried on a shaft 52 which in turn is mounted in the frame 10.
  • a furtherspro'cket 54 Secured to the shaft '52 is a furtherspro'cket 54 which by means of a chain 58 is in driving connection with a sprocket 56 rigidly secured onto the journal 16 of the cylinder 12.
  • the sprocket 50 is preferably located vertically below the center of the larger sprocket 56.
  • the relation between the gap 36 and the nip 38 is variable due to means being provided to displace the parts 12 and 14 relatively to one another.
  • the cylinder 12 is displaceable horizontally within the frame 10.
  • Said frame is on each side provided with an aperture bounded at its top and its base by straight guides 60 or a cover 62 provided on said guides and made of a material with suitable gliding properties such :as Teflon.
  • Blocks 64, 65 are mounted with their inner surface on the external ring of the bearings 20 and 21, respectively, and they are on their outer surface provided with straight guide faces intended for co-operation with the guides 60, 62.
  • covers 66, 68 Provided on either side of both bearings and the guide members are covers 66, 68 having a rectangular outer contour.
  • the horizontal displacement of the cylinder 12 is effected by hydraulic power in a manner which shall be described more in detail further below in this specification.
  • the interspace 69 the cross-section of which is crescentshaped and which viewed in the direction of rotation extends from adjacent the gap 36 to the nip 38 between the cylinder 12 and the drum 14 is laterally closed by stationary shield plates 70.
  • Said shield plates are sealed towards the suitably fiat lateral end faces of the cylinder and the drum by sealing members 72 and 74, respectively, and are adjusted relatively to said sealing members by means of screws 76. It is of substantial importance that the sealings fit as exactly as possible so as to reduce leaking out of fibrous material to a minimum.
  • the fibrous suspension to be treated in the press apparatus is introduced into the cross-sectionally crescent-shaped interspace 69 suitably from both sides thereof through a conduit 78 opening through the shield plate 70.
  • the interspace 69' is closed above the gap 36 or the supply conduit 78 by means of a partition wall 80. Since the gap 36 varies in size the partition wall 80 must be capable of performing its sealing function in spite of the varying spacing between the cylindrical screen surfaces of the cylinder and the drum. This is accomplished in the embodiments shown by tongues 82 made of rubber or Teflon and engaging the cylindrical surfaces in consideration.
  • Said slots 98 are arranged, as will be seen from FIG. 1, in groups displaced relatively one another both axially and peripherally in order to avoid inappropriate weakening of the sleeve.
  • the expelled liquid continues its flow through the channels 94 to the discharge apertures 96.
  • Located at the base part of the press is a collecting trough 100 with a drain 102 for recovery of the liquid to be treated further.
  • the inner cylinder 12 may be formed with surfaces of substantially the same kind as those of the drum 14 for separating and collecting the expelled liquid.
  • the cylindrical inner Wall of the cylinder 12 is thus formed of a screen 104 supported by a sleeve 106, which latter is provided with a great number of shallow grooves 108 communicating with the interior of the sleeve by means of groups of axial slots 110. Said slots open into pockets 1'12 limited by mutually parallel walls or partitions 114 and radially projecting walls or partitions 116 having foot-like prolongations .118.
  • the number of pockets 112 around the circumference is eight but may, of course, be any other suitable number.
  • the individual pockets are thus separated from one another both in the axial and in the peripheral directions.
  • radial bores 120 Adjacent the hub they communicate through radial bores 120 with an axial inner bore 122 extending through the cylinder and its two journals 16 and 18.
  • the bore 122 may be subdivided by means of an elongated partition member 123 participating in the rotation and divided into eight channels one for each row of pockets 112 so as to prevent any overflow of liquid between the various radial rows of pockets.
  • a stationary drain conduit 124 opening into the trough 100 is connected to one or both journals.
  • the suspension which in the case envisaged is assumed to consist of pulp fibers contained in a liquid containing chemicals in a concentration of solid particles of about 5 to 15 percent, for example, is introduced through the conduit or conduits 78 into the interspace 69 between the cylinder 12 and the drum 14. If desired the supply may be effected under superatmospheric pressure such as several kilograms per square centimeter, for example. While the cylinder and the drum slowly rotate in the direction indicated by the arrow 34, the liquid will be expressed through the two screens 84 and 104. The perforations of the screen may have so large diameter as one or several millimeters, since pulp fibers immediately deposit over the perforations during the initial part of the pressing operation and thereby form a kind of filter.
  • each of the bearings 20, 21 supporting the inner cylinder 12 is subjected to the action of a hydraulic servo-motor denoted by 130 and 132, respectively (see FIGS. 3 and 4).
  • Each of said servo-motors has a cylinder within which a plunger denoted by 134 and 136, respectively, is displaceable.
  • the plunger may house a central tap 138 having some capacity of automatic re-adjustment relative said plunger.
  • Oil is supplied to the plunger chamber of the servo-motors by conduits 140 and 142, respectively.
  • an annular groove 144 and a drain 146 may be provided in the casing of the servo-motor.
  • the pressure acting on the cylinder 12 is automatically adjusted according to the distribution of the material to be separated within the interspace 69 in the axial direction thereof. If, for example, when starting the press more material has collected at one side of the interspace than at its other side, the cylinder at that side, which has received less material, will have a tendency to greater displacement than the other side. If thus the cylinder 12 is loaded more at its right side than at its left side viewed in the plane of FIG. 4, the plunger 136 will immediately meet a strong counter-pressure while the plunger 134 will have a tendency to displace the cylinder, so as to tend to cause an inclination thereof. Such inclination must, however, be counter-acted inter alia because the sealing between the shield plates 70 and the cylinder would be impaired.
  • pistons 166 and 168 are operative to actuate the bearings 20 and 21, respectively, but in a direction opposite to the direction of actuation by the plungers 134 and 136. Since the pistons 166, 168 have a smaller diameter than the plungers 134, 136 the force by which the first-mentioned pistons actuate the cylinder 12 is less than the force exerted by the last-mentioned plungers as long as both the pistons and the plungers are subjected to the same specific oil pressure.
  • valve casing is formed with chambers 170, 172, 174 and 176, which all are in connection with a conduit system 178, 180 which in turn is in open communication with the sump 150 for which reason no pressure can be built up in said chambers.
  • a spring member 182 tends to push the body 148 to the left in the plane of FIG. 4.
  • a prolongation 184 of the body 148 projects from the casing of the valve and supports one end of a lever arm 186 mounted pivotally rotatable about a journal 188 formed on a bar 190.
  • the other end of said lever arm 186 is articulated with one end of a bar 194, the other end of which is inserted into the block 65 of the bearing 21.
  • Another lever arm 196 is pivotably mounted in the stationary point 198 and by its one end articulated with the bar 190 and by its other end with a bar 200 extending to the block 64 of the other bearing 20.
  • the roller 12 is displaceable in the horizontal plane in accordance with the description given hereinbefore and that the nip 38 is angularly displaced upwardly the further advantage is obtained that a larger pressure component is obtained than would be available if the nip would coincide with the plane of attack of the pressure. Since the driving sprocket is located below the bearings 20, 21 the cylinder 12 is capable of performing its displacement movements in the horizontal direction without any disturbing influence on the transfer of the driving force through the chain 58. The sprocket 60 will only swing over a minor angle in both directions from a central position which displacement is tolerable without any disadvantage.
  • the channel When a channel 208 during the rotation is covered by the slide 202, the channel is closed and at the same time the outer opening of the tube 206 arrives at or adjacent the nip 38.
  • the pockets 112 communicate through channels 210, 212 formed in the hub of the cylinder 12 and the shaft 204, respectively, with the interior of the slide 202 when the pockets pass through the upper part of the press where the removal of the compressed solid material is effected. It is obvious that the channels 208 and the channels 210, 212 are axially displaced in relationship to one another.
  • a cleaning may be accomplished by conducting a gas stream, preferably air under pressure or steam, through the holes 96 when these move past the nip and before they have passed the horizontal plane.
  • the space between the sleeve 86 and the outer wall of the drum should in such a structure be provided with partition walls subdividing said space into separate pockets, seen in the axial direction. Similar means may be provided for cleaning of the holes in the screen of the inner cylinder.
  • the pressure medium is introduced through a slide provided in the central bore of the inner cylinder which may resemble the member 202 though this latter has two passages.
  • a press constructed according to claim 1 and characterised by the fact that control members are provided to co-operate with the inner press member in a manner to distribute the pressure in the axial extension of space between the press members so that the one of the firstmentioned servo motors which displaces its end of the inner press member more than the other is partly or totally unloaded.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Milling Processes (AREA)
  • Filtration Of Liquid (AREA)
US15950A 1959-03-23 1960-03-18 Continuously operating press apparatus Expired - Lifetime US3086454A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE276259 1959-03-23

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US3086454A true US3086454A (en) 1963-04-23

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US15950A Expired - Lifetime US3086454A (en) 1959-03-23 1960-03-18 Continuously operating press apparatus

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Country Link
US (1) US3086454A (fi)
BE (1) BE588942A (fi)
CH (1) CH388264A (fi)
DE (1) DE1427413A1 (fi)
ES (1) ES256622A1 (fi)
FI (1) FI40092C (fi)
GB (1) GB952456A (fi)
NL (1) NL249681A (fi)
NO (1) NO121931B (fi)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3220340A (en) * 1962-09-28 1965-11-30 Ekstroems Maskinaffaer Ab Apparatus for dewatering liquid-containing material composition, preferably fibrous pulp suspensions
US3342124A (en) * 1964-03-20 1967-09-19 Ekstroems Maskinaffaer Ab Apparatus for dewatering and rinsing hydrous substances
US3878698A (en) * 1971-12-14 1975-04-22 Karlstad Mekaniska Ab Apparatus for forming and washing a fibrous web
US4499823A (en) * 1982-05-24 1985-02-19 S.I.C.A. Pulposec de Chevrieres Continuous press, in particular for pressing beet pulp and other juice-containing materials
US4566381A (en) * 1983-02-15 1986-01-28 Kone Oy Drum press for separating liquid from solid substance
US5699573A (en) * 1992-11-05 1997-12-23 Finbark Oy Method and pulp washing machine for washing of pulp or any corresponding material
AT15733U1 (de) * 2017-05-22 2018-05-15 Rudnick & Enners Maschinen Und Anlagenbau Gmbh Vorrichtung zur Entwässerung von Feststoffen

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL186950C (nl) * 1978-04-06 1991-04-16 Ici Spa Inrichting voor het continu uitpersen van vloeistofhoudend materiaal, in het bijzonder zaden of vruchten.
JPH0763873B2 (ja) * 1991-12-20 1995-07-12 富国工業株式会社 回転篩
US5433849A (en) * 1993-09-15 1995-07-18 Lyco Manufacturing, Inc. Double drum waste water screen

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374046A (en) * 1940-04-25 1945-04-17 Stacom Process Corp Method of disintegrating cellulosecontaining structures
US2682832A (en) * 1950-07-05 1954-07-06 Extraction Inc Apparatus for removal of juice from citrus fruit
US2715871A (en) * 1954-02-04 1955-08-23 Candian Internat Paper Company Pulp press
US2764869A (en) * 1954-08-19 1956-10-02 Origins Inc Means for synchronizing the travel of two or more traveling work elements
US2795184A (en) * 1953-06-16 1957-06-11 Robert P Graham Internal drum dejuicing press
US2978976A (en) * 1959-01-21 1961-04-11 Cincinnati Shaper Co Level control for press brakes and the like
US3000294A (en) * 1957-10-01 1961-09-19 Lowe Edison Filter press

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374046A (en) * 1940-04-25 1945-04-17 Stacom Process Corp Method of disintegrating cellulosecontaining structures
US2682832A (en) * 1950-07-05 1954-07-06 Extraction Inc Apparatus for removal of juice from citrus fruit
US2795184A (en) * 1953-06-16 1957-06-11 Robert P Graham Internal drum dejuicing press
US2715871A (en) * 1954-02-04 1955-08-23 Candian Internat Paper Company Pulp press
US2764869A (en) * 1954-08-19 1956-10-02 Origins Inc Means for synchronizing the travel of two or more traveling work elements
US3000294A (en) * 1957-10-01 1961-09-19 Lowe Edison Filter press
US2978976A (en) * 1959-01-21 1961-04-11 Cincinnati Shaper Co Level control for press brakes and the like

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3220340A (en) * 1962-09-28 1965-11-30 Ekstroems Maskinaffaer Ab Apparatus for dewatering liquid-containing material composition, preferably fibrous pulp suspensions
US3342124A (en) * 1964-03-20 1967-09-19 Ekstroems Maskinaffaer Ab Apparatus for dewatering and rinsing hydrous substances
US3878698A (en) * 1971-12-14 1975-04-22 Karlstad Mekaniska Ab Apparatus for forming and washing a fibrous web
US4499823A (en) * 1982-05-24 1985-02-19 S.I.C.A. Pulposec de Chevrieres Continuous press, in particular for pressing beet pulp and other juice-containing materials
US4566381A (en) * 1983-02-15 1986-01-28 Kone Oy Drum press for separating liquid from solid substance
US5699573A (en) * 1992-11-05 1997-12-23 Finbark Oy Method and pulp washing machine for washing of pulp or any corresponding material
AT15733U1 (de) * 2017-05-22 2018-05-15 Rudnick & Enners Maschinen Und Anlagenbau Gmbh Vorrichtung zur Entwässerung von Feststoffen

Also Published As

Publication number Publication date
DE1427413A1 (fi) 1969-07-03
NO121931B (fi) 1971-04-26
ES256622A1 (es) 1960-09-16
BE588942A (fr) 1960-07-18
FI40092B (fi) 1968-06-28
NL249681A (fi)
GB952456A (en) 1964-03-18
CH388264A (de) 1965-02-28
FI40092C (fi) 1968-10-10

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