WO2010036192A1 - Appareil destiné à laver et/ou épaissir une pâte à papier - Google Patents

Appareil destiné à laver et/ou épaissir une pâte à papier Download PDF

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Publication number
WO2010036192A1
WO2010036192A1 PCT/SE2009/051057 SE2009051057W WO2010036192A1 WO 2010036192 A1 WO2010036192 A1 WO 2010036192A1 SE 2009051057 W SE2009051057 W SE 2009051057W WO 2010036192 A1 WO2010036192 A1 WO 2010036192A1
Authority
WO
WIPO (PCT)
Prior art keywords
press
press roll
pair
adjusting device
pulp
Prior art date
Application number
PCT/SE2009/051057
Other languages
English (en)
Inventor
Fredrik Pontén
Johan Bylander
Original Assignee
Metso Paper, Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Metso Paper, Inc. filed Critical Metso Paper, Inc.
Priority to CN2009801382975A priority Critical patent/CN102165116A/zh
Priority to EP09816526.9A priority patent/EP2331746A4/fr
Priority to CA2735982A priority patent/CA2735982A1/fr
Publication of WO2010036192A1 publication Critical patent/WO2010036192A1/fr

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Classifications

    • 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
    • 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
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • D21C9/06—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in filters ; Washing of concentrated pulp, e.g. pulp mats, on filtering surfaces
    • 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

Definitions

  • the present invention relates to an apparatus for washing and/or dewater- ing pulp
  • a first press roll and a second press roll each press roll being rotatable about an axis of rotation and having a permeable outer surface, and a vat in which the press roils are installed.
  • the press rolls define a press nip between them, in which press nip the pulp is pressed, and the apparatus is arranged to feed the pulp in the direction of rotation of the press rolls through the press nip.
  • the apparatus comprises a first pair of bearing housings provided with bearings in which the ends of the first press roll are jour ⁇ alled, and each bearing housing of the first pair and the first press roll are movable in relation to the second press roll to vary the press nip.
  • the apparatus also comprises a second pair of bearing housings provided with bearings in which the ends of the second press roll are journalled.
  • a roll press When producing cellulose-based products, a roll press is frequently used for washing and dewateri ⁇ g the cellulose-based pulp.
  • the pulp is passed between two co-operating press rolls installed in the roll press, the press rolls having a perforated outer surface, a so called mantle surface, whereby the outer surface is permeable to liquid pressed out of the pulp, and the pulp is pressed in the roll nip, or the press nip, between the press rolls, whereby liquid is pressed out of the pulp.
  • the roll press also includes one or more washing zones prior to the press nip.
  • the lateral movement of the second press roll is attained by friction rails, normally made of a plastic material, on which the bearing housings, provided with bearings in which the laterally movable second press roll is journalled, rest and slide.
  • the linear load is determined by measuring the load on the bearing housings of the movable second press roll. The load cells used for determining the linear load are thus situated between the sliding bearing housings and the casing housing the press rolls, often behind the sliding bearing housings in their direction of motion/sliding.
  • the bearing housings, the end casing members, or gables, to which the bearing housings are attached, and the region between the sliding bearing housings and the casing housing where the load ceil is positioned in prior art are exposed to the heat from the vat.
  • vat temperature there is also a temperature change in the region of the load cell.
  • the object of the present invention is thus to provide an improved processing of pulp in an apparatus for washing and/or d ⁇ watering pulp comprising two rotatable press rolls,
  • each bearing housing of the first pair and the opposite bearing housing of the sec- ond pair are connected to each other by an adjusting device, which adjusting device is adapted to force the first press roll away from and towards the second press roll, respectively, and that the adjusting device is connected to at least one measuring member adapted to provide measurement values by means of which the linear load acting on the pulp in the press nip is determined,
  • the at least one measuring member for measuring the forces acting on the bearing housing is situated at a position where the influence of the heat from the vat and the resulting heat changes is minimal, whereby the performance of the measuring member is radically improved and gives an accurate measurement of the forces acting on the bearing housing, and consequently, the linear load acting on the pulp in the press nip can be more accurately and efficiently determined.
  • the adjusting device is advantageously controlled by a control system, or a control device, which controls the processing of the apparatus by setting one or several variable operating parameters, which setting is based on measurements and determinations of several control parameters, inter alia the linear load.
  • the at least one measuring member is advantageously connected to the control system, or the control device which may comprises a processing means, e.g. a CPU (Central Processing Unit).
  • the apparatus comprises determination means for deter- mining the linear toad based on the measurement values.
  • the determination means are adapted to take into account design parameters which are specific for the design of the overall apparatus, for example the geometry of the bearing housings, the vat pressure profile etc., or the determination means can be calibrated based on pre- vious measurements on the apparatus.
  • the adjusting device is directly connected, or directly at-
  • the at least one measuring member is mounted to the adjusting device.
  • the at least one measuring member comprises at least one force sensor
  • the adjusting device is attached to the bearing housing of one of the pairs by a first set of complementary attachment means, and said first set comprises the at least one force sensor for measuring forces acting on that set of complementary attachment means to determine the linear load acting on the
  • each bearing housing of the first pair and the opposite bearing housing of the second pair are connected to each other by an adjusting device, which adjusting device is adapted to force the first press roll away from and towards the second press roll, respectively, that the adjusting device is attached to the bearing housing of one of the pairs by a first set of complementary attachment means ! and that said first set comprises at least one force sensor for measuring forces acting on that set of complementary attachment means to determine the linear load acting on the pulp in the press nip.
  • the attachment means of the first set comprise an attachment element and at least one recess which the attachment element engages, and the attachment element Is provided with said at least one force sensor. Tests performed by the inventors of the present invention have shown that this position of the force sensor is especially advantageous in order to accurately determine the
  • the at least one force sensor is included in a cylindrical load cell, and the attachment element is cylindrical and houses the load cell. This embodiment provides for an efficient installation of force sensors at the above-mentioned location.
  • the attachment element and the recess are pivotable in relation to each other. Tests performed by the inventors have shown that this ar ⁇
  • the adjusting device is pivotaliy attached to the bearing housing of one of the pairs via a first pivot axis by the first set and piv ⁇ ta ⁇ y attached to the bearing housing of the other pair via a second pivot axis by a second set of complementary attachment means, and the first and second pivot axes are displaced in relation to the axes of rotation of the press rolls.
  • each bearing housing of the first pair is pivotabie about a third pivot axis which is displaced in relation to the axis of rotation of the first press roll and in relation to the first and second pivot axes, and the bearing housings of the first pair are adapted to move the first press roll in relation to the second press roii by pivoting about their third pivot axes, in addition to the source of errors because of the wear on the friction rails, the inventors of the present invention have also found that the force of the friction between the rails
  • friction rails can be excluded, there is no longer a need for repfacing worn out friction rails by new friction rails, which also reduces the costs for maintenance, since no stop of the roll press is necessary because of any change of friction rails.
  • the adjusting device is attached to the bearing housing of the first pair by said first set of complementary attachment means. Tests performed by the inventors have shown that this position of the force sensor, i.e. in connection with the pivotabie bearing housing, is advantageous in order to accu-
  • the apparatus comprises a casing which houses said vat and the two press rolls, and each bearing housing of the first pair is pivotally attached to the casing via its third pivot axis.
  • This pivota ⁇ y attachment can be ef- fected by a first means and a second means which are complementary to each other and pivotable In relation to each other, where the bearing housing of the first pair is provided with said first means and the casing is provided with said second means.
  • a pin can be provided on the casing and a recess can be provided in the bearing housing, which recess is complementary to and engaged by the pin.
  • the pin and recess are pivotable in relation each other about the third pivot axis.
  • the bearing housing could be provided with the pin and the casing could be provided with the recess.
  • the vat pressure tends to elevate the movable press roll in an upward direction.
  • the weight of the end casing members i.e. the ga- bles, of the apparatus, must be great so that the casing can withstand the forces of the vat pressure on the laterally movable press roll.
  • the innovative attachment of the first press roll to the casing, advantageously to the end casing members, via the third pivot axis balances the upward force originating from the vat pressure, and the casing including the end casing members can be manufactured using less material, providing end casing members and a casing of a reduced weight which still efficiently withstand the forces originating from the vat pressure.
  • the adjusting device is in the form of a pneumatic or hydraulic driving device and comprises a housing adapted to contain fluid
  • the at least one measuring member comprises at least one pressure sensor for measur- ing the pressure of the fluid provided to the housing to determine the linear load acting on the pulp in the press nip.
  • the pressure measuring equipment can be easily mounted to the apparatus, even to apparatuses already manufactured and installed on site.
  • the fluid can be a gas or a liquid, for example oil, but other fluids for the driving device may also be used.
  • the at least one pressure sensor is adapted to measure the pressure of a fluid situated in the housing of the adjusting device.
  • the measurement values of the pressure of a fluid situated in the housing are advan- tageous for determining the linear load.
  • the at least one pressure sensor can be adapted to measure the pressure of a fluid situated in a fluid-carrying line which connects the housing to a fluid reservoir.
  • the housing houses a piston which divides the inner space of the housing into a first chamber and a second chamber
  • the at least one pressure sensor is adapted to measure the pressure of the fluid of both the first chamber and the second chamber.
  • the at least one pressure sensor can be adapted to measure the pressure of a fluid situated in a fluid-carrying first line which connects the first chamber to a fluid reservoir and the pressure of a fluid situated in a fluid-carrying second line which connects the second chamber to a fluid reservoir.
  • the apparatus may also comprise determination means adapted to determine the difference between the fluid pressure of the first line and the fluid pressure of the second line, and adapted to determine the linear load based on the pressure difference between the first and second lines.
  • the apparatus comprises determination means adapted to determine the difference between the fluid pressure of the first chamber and the fluid pressure of the second chamber, and adapted to determine the linear load based on the pressure difference between the first and second chambers.
  • the adjusting device is in the form of a hydraulic driving device.
  • a hydra ⁇ iic driving device By using a hydra ⁇ iic driving device, an efficient control of the movable press roil and of the size of the press nip is achieved.
  • other devices for adjusting the distance between the press rolls are possible, such as devices based on eiectror ⁇ echanics.
  • the first pivot axis is positioned between the axis of rotation of the first press roll and the press nip, and the second pivot axis is posi- tioned between the axis of rotation of the second press roll and the press nip.
  • the longitudinal extension of the adjusting device can be reduced and thus be manufactured using even less material making it even less expensive to produce.
  • the adjusting device is pivotally attached to the bearing housing of the first pair via said first pivot axis, when the axes of rotation of the two press rolls are in the same plane which is substantially parallel to the plane on which the apparatus rests, the third pivot axis and the first pivot axis are positioned on different sides of said plane in which the axes of rotation of the two press rolls lie.
  • the adjusting device is subjected to less stress and forces in relation to an adjusting device attached to the bearing housing via the axis of rotation.
  • FIG. 1 is a schematic view of an embodiment of the apparatus according to present invention
  • Fig. 2 is a schematic view illustrating bearing housings of the apparatus of Fig, 1 ;
  • Fig. 3 is a schematic section view illustrating a set of complementary at- tachment means of a first embodiment of the apparatus according to the present invention
  • Fig, 4 is a schematic view of the set of complementary attachment means of Fig. 3 seen from above;
  • Fig. 5 is a schematic cut-away view illustrating an embodiment of an adjusting device of a second embodiment of the apparatus according to the present invention.
  • Fig, 1 schematically shows an embodiment of the apparatus for washing and dewatering cellulose-containing pulp according to the present invention pro- vided with an embodiment of the system according to the present invention schematically illustrated with blocks.
  • the apparatus comprises a first rotatabfe press roll 102 and a second rotatable press roll 104, each press roil 102, 104 having a permeable outer surface 108, 108 which is perforated, i.e. provided with apertures, whereby the outer surface 106, 108 is permeable to filtrate pressed out of the pulp.
  • the shape of the apertures is normally circular, but any shape is possible.
  • the press rolls 102, 104 comprise a number of fiftrate channels 110 radially inwards of the outer surface 106, 108 to lead evacuated filtrate away.
  • the two press rolls 102, 104 defines a press/roll nip 112 between them, in which press nip 112 the pulp is pressed, and are arranged to rotate in opposite directions, the left press roll 104 being arranged to rotate in counter clockwise direction and the right press roll 102 being arranged to rotate in clockwise direction,
  • the apparatus is arranged to feed the pulp in the direction of rotation of the press rolls 102, 104 through the press nip 112.
  • the axes of rotation of the press rolls 102, 104 being in substantially the same horizontal plane, and the apparatus is arranged to feed the pulp through the press nip 112 in a substantially vertical direction from below upwards.
  • One of the press roll 102, 104, herein the first press roll 102, is laterally movable in relation to the other press roll 104 to vary the press nip 112 under the operation of the apparatus.
  • the processing of the pulp in the apparatus is determined by a set of variable operating parameters which are variable during operation.
  • the cross- section of the press nip is on of these operating parameters.
  • the apparatus comprises a casing 113 which includes a vat 114, 116, 118 in which the press roils 102, 104 are installed, the vat 114, 116, 118 partly enclos- ing the outer surface 106, 108 of each press roll 102, 104, whereby a gap 124, 125 for each press roll 102, 104 is defined, limited by the vat 114, 118, 118 and the outer surface 106 » 108 of the respective press roil 102, 104,
  • the vat 114, 118, 118 can be pressurized and comprises a first side vat segment 114 which partly encloses the outer surface 106 of the first press roll 102, and a second side vat segment 118 which partly encloses the outer surface 108 of the second press roll 104, In the gap a vat pressure is built up during operation which tends to elevate the press rolls 102, 104 in an upward substantially vertical direction.
  • Said casing 113 comprises a first casing member 115 which extends between the ends of the first press roll 102 and to which the first side vat segment 114 is mounted, and a second casing member 117 which extends between the ends of the second press roll 104 and to which the second side vat segment 116 is mounted.
  • the first casing members 115 is pivotabie about a first axis 121 and the second casing members 117 Is pivotabie about a second axis 123, whereby the casing members 115, 117, together with their side vat segments 114, 118, are movable between a closed position and an opened position for providing access to the press rolls 102, 104.
  • the vat 114, 116, 118 comprises a centra] vaf segment 118 partly enclosing the outer surface 108, 108 of the press rolls 102, 104 between the press nip 112 and the side vat segments 114, 118.
  • the apparatus comprises a first pulp distribution device 128 for distributing pulp on the first press roll 102 and a second pulp distribution device 128 for distributing memep on the second press roil 104.
  • the pulp distribution devices 128, 128 are arranged to distribute pulp to the gap 124 along the whole length of each press roll 102, 104.
  • the pulp distributed on the outer surface 106, 108 of the press roll 102 r 104 forms a mat on the press rolls 102, 104.
  • the pulp distribution device 126, 128 is in the form of a pulp distribution screw. However, other kinds of pulp distribution devices are possible.
  • the pulp distribution device 128, 128 can also comprise several separate pulp distribution means distributed one after the other along the longitudinal extension of the press roll 102, 104.
  • Each pulp distri- button device 128, 128 is connectable to a pulp supplying system via connection means 140, 142, and the supplying system supplies pulp to each pulp distribution device 126, 128.
  • the apparatus also includes a pulp transport screw (not shown), which for example can be in the form of a pulp disintegrating screw or a shredder screw, to- wards which the pulp which has been pressed in the press nip 112 is conveyed.
  • the pulp transport screw extends paralielly to the longitudinal axes of the press rolls 102, 104, and is arranged to disintegrate the pulp and transport the pulp axi- aiiy away from the press for further processing.
  • the apparatus includes a first pair of bearing housings 202 provided with bearings 204, in which bearings 204 the ends of the first press roll 102 are journalled, and a second pair of bearing housings 208 provided with bearings 208, in which bearings 208 the ends of the second press roil 104 are joumalled,
  • the casing 113 of the apparatus includes two end casing members 210 (only one end casing member is shown in Fig.
  • each end casing member 210 comprises a beam 212 to which both a bearing housing 202 of the first pair and the opposite bearing housing 208 of the second pair are attached.
  • the bearing housing 202 of the first pair is pivotally attached to the beam 212 via a third pivot axis 214 which is displaced in relation to the axis of rotation 218 of the first press roll 102, and the bearing housings 202 of the first pair are adapted to move the first press roll 102 in relation to the second press roll 104 by pivoting about their third pivot axes 214.
  • the bearing housings 206 of the sec- ood pair are fixedly attached to the beam 212.
  • the pivotally attachment of the bearing housings 202 of the first pair to the beam 212 is effected by a pin 215 provided on each bearing housing 202 and a recess 217 provided in each beam 212, which recess 217 is complementary to and engaged by the pin 215.
  • the pin 215 and recess 217 are prvotable in relation each other about the third pivot axis 214.
  • the apparatus rests on a plane, and the axis of rotation 218 of the second press roll 104 and the axis of rotation 218 of the first press roll 102 are in the same plane which is substantially horizontal and substantially parallel to the plane on which apparatus rests.
  • the third pivot axis 214 and the axis of rotation 218 of the first press roll 102 lie in the same plane which is transverse to the plane on which the apparatus rests.
  • Each bearing housing 202 of the first pair and the opposite bearing housing 208 of the second pair are connected to each other by an adjusting device 220, in the form of a hydraulic driving device, more precisely a hydraulic cylinder in the disclosed embodiment.
  • the adjusting devices 220 one provided at one end of the apparatus and the other provided at the other end of the apparatus, are adapted to force the iateraily movable press roil 102 away from the stationary second press roll 104 and towards the second press roll 104 for providing a specific distance between the press rolls 102, 104 and for keeping this distance.
  • the adjusting device 220 is pivotally attached to the bearing housing 202 of the first pair via a first pivot axis 222, which is displaced in relation to the third pivot axis 214 and the axis of rotation 218 of the first press roll 102, and pivotally attached to the bearing housing 206 of the second pair via a second pivot axis 224, which is displaced in relation to the axis of rotation 218 of the second press roll 104.
  • the adjusting devices 220 are adapted to perform the lateral movement of the first press roil 102 by pivoting the bearing housings 202 of the first pair about their third pivot axes 214.
  • the third pivot axis 214 and the first pivot axis 222 are positioned on different sides of the plane in which the axes of rotation 218, 218 of the press rolls 102, 104 lie, which plane is substantially parallel to the plane on which the apparatus rests.
  • the first pivot axis 222 is positioned between the axis of rotation 218 of the first press roll 102 and the press nip 212
  • the second pivot axis 224 is positioned between the axis of rotation 218 of the second press roil 104 and the press nip 212.
  • the adjusting device 220 is pivoia ⁇ y attached to the bearing housing 202 of the first pair by means of a first set 226 of complementary attachment members, and the adjusting device 220 is pivotaliy attached to the bearing housing 206 of the second pair by means of a second set 228 of complementary attachment members.
  • the complementary attachment members of the first set 228 generally correspond to the complementary attachment members of the second set 228.
  • the adjusting device 220 is provided with a first attachment member of the first set 226, which includes a circular-cylindrical attachment element 302.
  • the bearing housings 202 of the first pair is provided with a second attachment member of the first set 228, which includes a recess 304 which is complementary to the cylindrical attachment element 302.
  • the adjusting device may be provided with the recess 304, and the bearing housings 202 of the first pair may be provided with the circular-cylindrical attachment element.
  • the attachment element 302 engages the re- cess 304, and the attachment element 302 and the recess 304 are pivotable in relation to each other about the first pivot axis 222.
  • the attachment element 302 houses a cylindrical load eel! 306 provided with several force sensors 308 for measuring forces acting on the cylindrical at- tachment element 302, which measurement then is used for determining the linear
  • the above-mentioned measuring is performed at both adjusting devices 220.
  • the toad cell 308 may be connected to a controf device including a CPU and determination means adapted to determine the linear toad based on forces acting on the first set 226 of complementary attachment means and measured by the load cell 308, in view of the design of the overall apparatus, for example the geometry of the bearing housings, the vat pressure profile etc.
  • Fig. 5 shows a schematic cut-away view illustrating an embodiment of an adjusting device 501 of a second embodiment of the apparatus according to the present invention.
  • the apparatus comprises two adjusting devices 501 , one adjusting device 501 being provided at one end of the apparatus and the other adjusting device 501 being provided at the other end of the apparatus.
  • the adjusting device 501 is in the form of hydraulic driving device 501 and comprises a housing 502 adapted to contain an oii-based liquid.
  • the adjusting device 501 is provided with a circular-cyiindrica! first attachment element 302 and a circular-cylindrical second attachment element 504.
  • the first attachment element 302 is adapted to be connected to one of the bearing housings 202, in a similar way as previously disclosed in connection with the first embodiment of the apparatus but without the toad cell 308, and the second attachment element 504 is adapted to be connected to the other bearing housing 206 opposite the bearing housing 202 to which the first attachment element 302 is connected.
  • the housing 502 of the adjusting device 501 houses a piston 506 which divides the inner space of the housing 502 into a first chamber 508 and a second chamber 51O 1 and the piston 508 is axiaily movable in relation to the housing 502.
  • a piston rod 512 is mounted to the piston 506 and to the first attachment element 302.
  • each chamber 508, 510 is provided with a connection means 514, 518 for the inlet and outlet of pressurized oil, and each connections means 514, 516 is connected to an oil reservoir 518 via an oil-carrying line 52O 3 522, or conduit, and via a pump device 524 which controls the flow of the oil between the oil reservoir 518 and the chambers 508, 510.
  • the adjusting device 501 is provided with a first pressure sensor 528 for measuring the pressure of the fluid situated in the first chamber 508 and with a second pressure sensor 528 for measuring the pressure of the fluid situated in the second chamber 510.
  • Each pressure sensor 528, 528 is directly attached and mounted to the adjusting device 501.
  • the apparatus includes a control device 530 including a CPU and determination means 532 adapted to determine the difference between the fluid pressure of the first chamber 508 and the fluid pressure of the second chamber 510,
  • the determination means 532 is adapted to determine the linear load based on the pressure difference between the first and second chambers 508, 510, in view of the design of the overall apparatus, for example the geometry of the bearing housings, the vat pressure profile etc.
  • the control device 530 may also be adapted to control the pump device 524 and consequently the adjusting device 501. The above-mentioned measuring of the pressures is performed at both adjusting devices 501 , and consequently, in this embodiment the pressure of four housing chambers is measured.
  • the adjusting device may be connected to both at least one toad cell and at least one pressure sensor.
  • the performance and the flexibility of a roll press are improved since the press nip can be more efficiently controlled based on a more accurate and more easy determination of the linear load, whereby the capac- ity of the apparatus is improved, and a desired quality of the pressed pulp is at-

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

L’invention concerne un appareil destiné à laver et/ou épaissir une pâte à papier comprenant un premier et un second rouleau presseur (102, 104), chaque rouleau presseur (102, 104) étant perméable et pouvant tourner autour d’un axe de rotation (218, 218), et une cuve (114, 116, 118) dans laquelle les rouleaux presseurs (102, 104) sont installés. Les rouleaux presseurs (102, 104} définissent une ligne de contact (112) entre eux. L’appareil comprend une première paire de logements de roulement (202) dotés de roulements (204) pour le premier rouleau presseur (102), chaque logement de roulement (202) de la première paire et le premier rouleau presseur (102) étant mobiles par rapport au second rouleau presseur (102, 104) pour modifier la ligne de contact (112). L’appareil comprend une seconde paire de logements de roulement (208) dotés des roulements (208) pour le second rouleau presseur (104). Chaque logement de roulement (202) de la première paire et le logement de roulement opposé (208) de la seconde paire sont reliés par un dispositif de réglage (220 ; 501) conçu pour pousser le premier rouleau presseur (102) à distance et en direction du second rouleau presseur (104). Le dispositif de réglage (220 ; 501) est relié à au moins un élément de mesure conçu pour fournir des valeurs de mesure au moyen desquelles la charge linéaire agissant sur la pâte à papier dans la ligne de contact (112) est déterminée.
PCT/SE2009/051057 2008-09-24 2009-09-23 Appareil destiné à laver et/ou épaissir une pâte à papier WO2010036192A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2009801382975A CN102165116A (zh) 2008-09-24 2009-09-23 对纸浆进行洗涤和/或脱水的设备
EP09816526.9A EP2331746A4 (fr) 2008-09-24 2009-09-23 Appareil destiné à laver et/ou épaissir une pâte à papier
CA2735982A CA2735982A1 (fr) 2008-09-24 2009-09-23 Appareil destine a laver et/ou epaissir une pate a papier

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0802029-9 2008-09-24
SE0802029A SE0802029A2 (sv) 2008-09-24 2008-09-24 Apparat för tvättning och/eller avvattning av massa

Publications (1)

Publication Number Publication Date
WO2010036192A1 true WO2010036192A1 (fr) 2010-04-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2009/051057 WO2010036192A1 (fr) 2008-09-24 2009-09-23 Appareil destiné à laver et/ou épaissir une pâte à papier

Country Status (5)

Country Link
EP (1) EP2331746A4 (fr)
CN (1) CN102165116A (fr)
CA (1) CA2735982A1 (fr)
SE (1) SE0802029A2 (fr)
WO (1) WO2010036192A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012112117A1 (fr) * 2011-02-18 2012-08-23 Metso Paper Karlstad Ab Dispositif presse à ligne de contact étendue, machine à papier et procédé permettant de faire fonctionner un dispositif presse
CN103403250A (zh) * 2011-03-24 2013-11-20 美卓造纸机械（瑞典）有限公司 用于调节压隙的装置
CN105829603A (zh) * 2013-12-19 2016-08-03 维美德公司 纸浆生产布置及方法
EP3512997A4 (fr) * 2016-09-15 2020-02-26 Valmet AB Appareil de lavage et de déshydratation de pulpe, système de commande d'un tel appareil, et procédé de traitement de pulpe dans un tel appareil
SE2050278A1 (en) * 2020-03-16 2021-09-17 Andritz Ab A press for washing and/or dewatering a liquid suspension

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CN103410037A (zh) * 2013-07-12 2013-11-27 海南金海浆纸业有限公司 双辊压榨洗浆机高压喷淋清洗装置
CN104960223A (zh) * 2014-10-30 2015-10-07 雄县牛宝秸秆青草加工有限公司 一种汁渣分离方法
CN118207743A (zh) * 2022-06-21 2024-06-18 汶瑞机械(山东)有限公司 一种双辊洗浆机的辊用线压力调节机构

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US4168806A (en) * 1977-02-02 1979-09-25 Klockner-Humboldt-Deutz Ag Roll type crushing mill
EP0706827A1 (fr) * 1994-10-11 1996-04-17 Satake Uk Limited Machine à moudre les céréales
WO1997022543A1 (fr) * 1995-12-20 1997-06-26 Nobel Elektronik Ab Dispositif de regulation de la force de pincement dans une machine a mecanisme de bobinage
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Cited By (13)

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WO2012112117A1 (fr) * 2011-02-18 2012-08-23 Metso Paper Karlstad Ab Dispositif presse à ligne de contact étendue, machine à papier et procédé permettant de faire fonctionner un dispositif presse
CN103502530A (zh) * 2011-02-18 2014-01-08 美卓造纸机械(瑞典)公司 具有扩展压区的压榨装置、造纸机及操作压榨装置的方法
US8673118B2 (en) 2011-02-18 2014-03-18 Valmet Aktiebolag Press device with an extended nip, a paper making machine and a method of operating a press device
CN103403250A (zh) * 2011-03-24 2013-11-20 美卓造纸机械（瑞典）有限公司 用于调节压隙的装置
EP2689064A1 (fr) * 2011-03-24 2014-01-29 Metso Paper Sweden AB Dispositif pour ajuster une ligne de pressage
EP2689064A4 (fr) * 2011-03-24 2014-10-22 Valmet Aktiebolag Dispositif pour ajuster une ligne de pressage
CN105829603A (zh) * 2013-12-19 2016-08-03 维美德公司 纸浆生产布置及方法
EP3084071A4 (fr) * 2013-12-19 2017-08-02 Valmet Aktiebolag Agencement et procédé de production de pâte
US10227728B2 (en) 2013-12-19 2019-03-12 Valmet Ab Pulp production arrangement and method
EP3512997A4 (fr) * 2016-09-15 2020-02-26 Valmet AB Appareil de lavage et de déshydratation de pulpe, système de commande d'un tel appareil, et procédé de traitement de pulpe dans un tel appareil
US11702795B2 (en) 2016-09-15 2023-07-18 Valmet Ab Apparatus for washing and dewatering pulp, a system for controlling such an apparatus, and a method for processing pulp in such an apparatus
SE2050278A1 (en) * 2020-03-16 2021-09-17 Andritz Ab A press for washing and/or dewatering a liquid suspension
SE544862C2 (en) * 2020-03-16 2022-12-13 Andritz Ab A press for washing and/or dewatering a liquid suspension

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SE0802029A1 (sv) 2010-03-25
SE532910C2 (sv) 2010-05-04
CA2735982A1 (fr) 2010-04-01
CN102165116A (zh) 2011-08-24
EP2331746A1 (fr) 2011-06-15
EP2331746A4 (fr) 2013-07-10
SE0802029A2 (sv) 2010-07-20

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