WO2011083656A1 - Paper device and papermaking device - Google Patents

Paper device and papermaking device Download PDF

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Publication number
WO2011083656A1
WO2011083656A1 PCT/JP2010/072076 JP2010072076W WO2011083656A1 WO 2011083656 A1 WO2011083656 A1 WO 2011083656A1 JP 2010072076 W JP2010072076 W JP 2010072076W WO 2011083656 A1 WO2011083656 A1 WO 2011083656A1
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WO
WIPO (PCT)
Prior art keywords
papermaking
dewatering
paper
papermaking belt
belt
Prior art date
Application number
PCT/JP2010/072076
Other languages
French (fr)
Japanese (ja)
Inventor
章 川口
晋基 谷本
Original Assignee
デュプロ精工株式会社
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 デュプロ精工株式会社 filed Critical デュプロ精工株式会社
Priority to DE201011005105 priority Critical patent/DE112010005105T5/en
Publication of WO2011083656A1 publication Critical patent/WO2011083656A1/en

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Classifications

    • 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
    • D21F1/32—Washing wire-cloths or felts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/02—Complete machines for making continuous webs of paper of the Fourdrinier type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Definitions

  • the present invention relates to a papermaking apparatus having a papermaking belt and a papermaking apparatus provided with the papermaking apparatus.
  • a paper making apparatus 100 makes a paper making wire 102 (paper making belt) wound around a plurality of rollers 101 and a pulp suspension 103 into paper.
  • the rotation path of the papermaking wire 102 includes an upper dewatering path 106 for filtering and dewatering the pulp suspension 103 supplied from the head box 104, and a lower return path that reverses and returns from the downstream side to the upstream side of the dewatering path 106. 107.
  • the papermaking apparatus 100 is provided with a cleaning device 109 for cleaning the papermaking wire 102 by jetting high-pressure water 108 to the back surface of the papermaking wire 102 in the return path 107.
  • a cleaning device 109 for cleaning the papermaking wire 102 by jetting high-pressure water 108 to the back surface of the papermaking wire 102 in the return path 107.
  • tap water is used as the high-pressure water 108.
  • the pulp suspension 103 is supplied onto the papermaking wire 102 rotating from the head box 104 and filtered and dehydrated in the dewatering path 106. Thereby, the pulp suspension 103 becomes a sheet-like wet paper 111 in which fibers are entangled with each other.
  • the cleaning device 109 jets high-pressure water 108 to the back surface of the papermaking wire 102 in the return path 107 to clean the papermaking wire 102.
  • the papermaking apparatus 100 is provided with a plurality of blades 112 (water draining apparatuses) that drain the wet paper 111 on the papermaking wire 102 in sliding contact with the back surface of the papermaking wire 102 in the dewatering path 106.
  • blades 112 water draining apparatuses
  • a paper making apparatus provided with a blade for draining is described in, for example, Japanese Patent Publication No.
  • the filtrate 113 that has passed (permeated) the papermaking wire 102 is removed from the back surface of the papermaking wire 102 by the blade 112.
  • tap water is used for the high-pressure water 108, so the amount of tap water used for cleaning the papermaking wire 102 increases and the cleaning cost increases. There is a problem.
  • the filtrate 113 is locally distributed when flowing down through the blade 112, and accordingly, in the wet paper 111 on the papermaking wire 102.
  • the density of the contained fibers is also non-uniform.
  • the wet paper 111 has a portion 114 having a high fiber density and a portion 115 having a low fiber density. As a result, the formation (homogeneity) of the paper obtained by papermaking is lowered, and the paper is uneven. is there.
  • the dewatering efficiency of the wet paper 111 can be maintained to some extent, but the dewatering efficiency of the wet paper is further improved. There is a problem that it is difficult.
  • An object of the present invention is to provide a papermaking apparatus and a papermaking apparatus that can efficiently obtain good quality paper at low cost.
  • an endless papermaking belt is provided in the filtration and dewatering unit, the papermaking belt rotates, and a pulp suspension containing fibers is transferred from the supply unit onto the papermaking belt.
  • a paper machine that is supplied and filtered and dehydrated,
  • the papermaking belt rotation path includes a dewatering path for filtering and dewatering the pulp suspension supplied from the supply section, and a downstream side of the dewatering path after transferring the wet paper generated by the filtration dewatering to the next process section at the subsequent stage.
  • a cleaning device for cleaning the papermaking belt is provided, The washing device discharges the filtrate that has passed through the papermaking belt in the dewatering path to the papermaking belt in the return path.
  • the pulp suspension is supplied from the supply unit to the rotating papermaking belt and filtered and dehydrated in the dewatering path.
  • a sheet-like wet paper in which fibers are intertwined from the pulp suspension is generated.
  • the cleaning device discharges the filtrate that has passed through the papermaking belt in the dewatering path to the papermaking belt in the return path. For this reason, the papermaking belt is washed in the return path, and the fibers remaining on the papermaking belt are washed away and removed. Thereby, the formation (homogeneity) of the paper obtained by papermaking is improved, and the occurrence of unevenness is prevented.
  • the washing cost of the papermaking belt is reduced compared to the case where separate washing water (such as tap water) is used separately. Is done.
  • the cleaning device has a receiving member that receives the filtrate, a discharging member that discharges the filtrate, and a feed channel that guides the filtrate received by the receiving member to the discharging member,
  • the discharge member is disposed below the receiving member.
  • the filtrate that has passed through the papermaking belt in the dewatering path is received by the receiving member, flows to the discharging member through the feed channel, and is discharged from the discharging member to the papermaking belt.
  • the discharge member since the discharge member is disposed below the receiving member, the filtrate received by the receiving member flows to the discharge member through the feed flow path by natural flow. This eliminates the need for a pump or the like for sending the filtrate from the member to the discharge member, thereby reducing the cost.
  • the papermaking belt is wound around a plurality of rotatable rollers,
  • the cleaning device discharges the filtrate toward the roller in the return path.
  • a part of the filtrate discharged from the cleaning device to the surface of the papermaking belt is collected in a gap portion between the outer peripheral surface of the roller and the back surface of the papermaking belt. Then, the fibers on the surface of the papermaking belt are released from the state of being in close contact with the surface of the papermaking belt by the filtrate collected in the gap portion, and slightly float. Thus, since the fibers are slightly lifted from the surface of the papermaking belt and are washed away by the filtrate discharged from the cleaning device, the cleaning effect is improved.
  • a storage part for storing the filtrate is provided below the papermaking belt, An upper water supply unit for supplying upper water containing no fibers to the storage unit and an agitation device for stirring the filtrate in the storage unit are provided.
  • the filtrate stored in the storage part is diluted with clean water, and the fiber concentration contained in the filtrate is lowered. Further, by stirring the filtrate in the storage unit with the stirring device, the fibers precipitated at the bottom of the storage unit are stirred and dispersed.
  • the pipe provided in the flow path for taking out the filtrate by reducing the fiber concentration and dispersing the fibers as described above. It is possible to prevent clogging of fibers in the valve, valve, pump and the like.
  • a press section is provided as a next process section after the filtration dehydration section.
  • the press unit is provided with a pair of rotatable endless water-absorbing belts that squeeze the wet paper transferred from the filtration and dehydration unit from both the front and back surfaces,
  • a removal roller that transfers and removes fibers remaining on at least one surface of the water absorption belt and the papermaking belt, and a peeling member that peels off the fibers transferred to the surface of the removal roller are provided,
  • the removing roller is in contact with at least one of the surface of the water absorbing belt and the papermaking belt so as to be rotatable.
  • the wet paper filtered and dehydrated in the filtration dehydration unit is transferred from the papermaking belt of the filtration dehydration unit to the water absorption belt of the press unit, and is squeezed between the pair of water absorption belts.
  • the fibers remaining on the surface of the water absorbing belt or the papermaking belt are transferred to the removing roller and removed from the water absorbing belt or the papermaking belt.
  • the fibers remaining on the water absorbing belt are prevented from adhering to the wet paper on the downstream side and the formation is lowered, and the formation of the paper obtained by papermaking is improved.
  • the fibers transferred to the removing roller as described above are peeled off from the surface of the removing roller by the peeling member.
  • an endless papermaking belt is provided in the filtration dewatering unit, the papermaking belt rotates, and a pulp suspension containing fibers is supplied from the supply unit onto the papermaking belt.
  • a paper making apparatus A draining device that drains wet paper on the papermaking belt in sliding contact with the backside of the papermaking belt is provided.
  • the draining device has a water absorbing member that is in sliding contact with the back surface of the papermaking belt.
  • the pulp suspension is supplied to a papermaking belt rotating from the supply unit, filtered and dehydrated, and becomes a sheet-like wet paper in which fibers are intertwined.
  • the filtrate that has passed through the papermaking belt is removed from the back surface of the papermaking belt by a draining device.
  • the filtrate is substantially uniformly absorbed by the water-absorbing member that is in sliding contact with the back surface of the papermaking belt, and is dispersed in the water-absorbing member.
  • an endless papermaking belt is provided in the filtration dewatering unit, the papermaking belt rotates, and a pulp suspension containing fibers is supplied from the supply unit onto the papermaking belt.
  • the papermaking belt rotation path includes a dewatering path for filtering and dewatering the pulp suspension supplied from the supply section, and a downstream side of the dewatering path after transferring the wet paper generated by the filtration dewatering to the next process section at the subsequent stage.
  • the papermaking belt is wound around multiple rotatable rollers, At least one of the roller positioned below the supply unit and the roller positioned downstream of the supply unit on the dewatering path includes a roller body and a water absorbing member provided on the outer periphery of the roller body. And The water-absorbing member is expandable / contractable in the radial direction, and a contact portion that is in contact with the papermaking belt is reduced, and a remaining separation portion that is not in contact with the papermaking belt is expanded.
  • the pulp suspension is supplied to a papermaking belt rotating from the supply unit, filtered and dehydrated, and becomes a sheet-like wet paper in which fibers are intertwined.
  • a roller positioned below the supply unit on the dehydration path (or a roller positioned on the downstream side of the supply unit on the dehydration path) rotates.
  • the water-absorbing member of the roller is pressed and compressed by the papermaking belt at the abutting portion that contacts the papermaking belt, and is deformed to be reduced.
  • the filtrate that has passed through the papermaking belt is sucked into the water absorbent member when the water absorbent member is expanded and deformed from a reduced deformation state. For this reason, dehydration is promoted by utilizing the expansion and contraction of the water absorbing member of the roller, and the dewatering efficiency of the wet paper is improved.
  • the eighth invention is a papermaking apparatus comprising the papermaking apparatus according to any one of the first to seventh inventions.
  • FIG. 2 is a block diagram showing the main configuration of the paper making apparatus.
  • FIG. It is the schematic which shows the main structures of the paper making apparatus of a paper manufacturing apparatus. It is a perspective view of the wire part of a papermaking apparatus. It is a partially cutaway side view of the wire part of the paper making apparatus.
  • FIG. 3 is an enlarged side view of the wire cleaning device and its peripheral portion of the paper making apparatus. It is a top view of the wire part of a papermaking apparatus. It is an enlarged side view of the discharge
  • FIG. 1 It is an enlarged side view of the removal roller and its peripheral part of the paper making apparatus. It is an enlarged side view of the removal roller and its peripheral part of the paper making apparatus. It is a side view of the wire part of the papermaking apparatus in the 2nd Embodiment of this invention. It is an enlarged side view of the discharge
  • FIG. 1 It is an enlarged side view of the removal roller and its peripheral part of the paper making apparatus. It is an enlarged side view of the removal roller and its peripheral part of the paper making apparatus. It is a side view of the wire part of the papermaking apparatus in the 2nd Embodiment
  • FIG. 14B is a view on arrow XX in FIG. 14A. It is a side view of the draining device of the papermaking apparatus in the 5th Embodiment of this invention. It is an enlarged side view of the head box and roller of the paper making apparatus in the 6th Embodiment of this invention, and its peripheral part.
  • FIG. 3 is an enlarged side view of a single roller of the paper making apparatus. It is a side view of the wire part of the conventional papermaking apparatus. It is a side view of the blade for draining provided in the papermaking apparatus.
  • FIG. 19B is a view on arrow XX in FIG. 19A.
  • the used paper recycling processing apparatus 1 is a small one that integrally includes a used paper pulp manufacturing apparatus 2, a deinking apparatus 3, a paper making apparatus 4, a finishing apparatus 5, and a drainage processing apparatus 6.
  • the used paper pulp manufacturing apparatus 2 includes a cutting unit 8 that cuts the used paper 7, and a pulper device 9 that releases the cut used paper 7 to produce a pulp suspension 12 (see FIG. 3) containing fibers. .
  • the deinking device 3 deinks the pulp suspension 12 produced in the pulper device 9.
  • regeneration processing apparatus 1 is provided with the deinking apparatus 3, it may not be provided.
  • the paper making device 4 makes the pulp suspension 12 deinked in the deinking device 3, and dries the wet paper 10 obtained by the paper making.
  • the finishing device 5 performs finishing by cutting the wet paper 10 dried in the paper making device 4 into a predetermined size, and obtains recycled paper 11.
  • the drainage treatment device 6 is for treating the drainage generated in each of the deinking device 3 and the papermaking device 4.
  • the paper making apparatus 4 includes, in order from the upstream side to the downstream side, a wire unit 15 (an example of a filtration dewatering unit) that generates the wet paper 10 from the pulp suspension 12, a press unit 16 that compresses and dehydrates the wet paper 10, And a drying unit 17 for drying the paper 10.
  • a wire unit 15 an example of a filtration dewatering unit
  • a press unit 16 that compresses and dehydrates the wet paper 10
  • a drying unit 17 for drying the paper 10.
  • the wire portion 15 is provided with an endless paper-making wire 18 (an example of a paper-making belt).
  • the papermaking wire 18 rotates in one direction, and the pulp suspension 12 containing fibers is supplied from the head box 19 (an example of a supply unit) onto the papermaking wire 18 and is filtered and dehydrated.
  • the paper making wire 18 is a belt having a mesh structure having water permeability, for example, a belt made of a metal or resin net or the like.
  • the papermaking wire 18 is wound around a plurality of rotatable rollers 20-22.
  • the wire portion 15 is provided with a pair of side frames 24, and the rollers 20 to 22 are provided between the pair of side frames 24.
  • the first roller 20 is located immediately below the liquid supply port 23 of the head box 19, and the second roller 21 is located behind the first roller 20.
  • the third roller 22 is positioned lower than the two rollers 20 and 21 and in front of the first roller 20.
  • rollers 20 to 22 is forcibly rotated by a driving device such as a motor.
  • the widths of the rollers 20 to 22 are slightly larger than the width of the papermaking wire 18.
  • the rotation path of the papermaking wire 18 includes a dewatering path 25 for filtering and dewatering the pulp suspension 12 supplied from the head box 19, and a press on the wet paper 10 generated by the filtering dewatering. And a return path 26 that is reversed from the downstream side of the dewatering path 25 to the upstream side after being transferred to the section 16 (an example of the next process section).
  • the dewatering path 25 is formed in the horizontal direction between the first roller 20 and the second roller 21.
  • the return path 26 is formed between the first return path 26 a formed to be inclined between the second roller 21 and the third roller 22, and between the third roller 22 and the first roller 20.
  • a second return path 26b formed so as to be inclined.
  • the wire unit 15 is provided with a cleaning device 28 for cleaning the papermaking wire 18.
  • the cleaning device 28 discharges the filtrate 29 that has passed from the front surface to the back surface of the papermaking wire 18 in the dewatering path 25 to the surface of the papermaking wire 18 in the return path 26.
  • the surface of the papermaking wire 18 is a surface on the side where the pulp suspension 12 is supplied from the head box 19.
  • the cleaning device 28 is a dish-shaped (shallow box-shaped) receiving member 30 that receives the filtrate 29, a discharge member 31 that discharges the filtrate 29, and a feed that guides the filtrate 29 received by the receiving member 30 to the discharge member 31. And a flow path 32.
  • the receiving member 30 is disposed below the papermaking wire 18 in the dewatering path 25, and the width of the receiving member 30 is the same as or slightly larger than the width of the papermaking wire 18.
  • the discharge member 31 has a discharge port 33 at the lower end and is disposed below the receiving member 30.
  • the width of the discharge port 33 is substantially the same as or the same as the width of the papermaking wire 18.
  • the feed channel 32 is made of piping, and the upper end of the feed channel 32 communicates with the bottom of the receiving member 30 and the lower end communicates with the upper portion of the discharge member 31.
  • the discharge port 33 is disposed so as to face the outer peripheral surface of the third roller 22 (an example of a roller in the return path) from above, so that the filtrate 29 flows from the discharge port 33 to the first. It is discharged toward the third roller 22.
  • a receiving tray 35 for receiving the filtrate 29 discharged from the discharge port 33 toward the third roller 22 is provided on one end frame 34 provided between the front ends of the pair of side frames 24.
  • a cleaning water injection device 36 for injecting clean water 37 (tap water or the like) toward the back surface of the papermaking wire 18 in the first return path 26a.
  • a white water tank 38 (an example of a storage unit) that stores the filtrate 29 is provided below the papermaking wire 18.
  • the filtrate 29 is also called white water because it is a white liquid containing fibers.
  • the other end frame 39 is provided between the rear ends of the pair of side frames 24.
  • the other end frame 39 is provided with a water supply unit 40 that supplies water 44 (tap water or the like) that does not contain fibers to the white water tank 38.
  • a stirring device 41 for stirring the filtrate 29 is provided in the white water tank 38.
  • a return passage 42 for returning the filtrate 29 in the white water tank 38 to the pulper device 9 is connected to the bottom of the front end of the white water tank 38 (that is, the end opposite to the water supply unit 40).
  • the return flow path 42 is made of piping, and one end communicates with the bottom surface of the white water tank 38 and the other end communicates with the pulper device 9.
  • the return flow path 42 is provided with a valve, a pump, and the like.
  • An inclined plate 43 that forms the bottom surface of the white water tank 38 is provided in the white water tank 38. The inclined plate 43 is inclined such that one end on the water supply section 40 side is higher and the other end on the return flow path 42 side is lower.
  • the press unit 16 includes a pair of upper and lower rotatable endless felts 47 and 48 that squeeze the wet paper 10 transferred from the wire unit 15 from both the front and back surfaces.
  • the upper felt 47 is a belt wound around a plurality of rollers 49a to 49e.
  • the lower felt 48 is a belt wound around a plurality of rollers 50a to 50e.
  • the pair of rollers 49b and 50b and the rollers 49c and 50c opposed to each other in the vertical direction have a function of a squeezing roller that squeezes both the felts 47 and 48 therebetween. Any one of the rollers 49a to 49e and any one of the rollers 50a to 50e are forcibly rotated by a driving device such as a motor.
  • the press unit 16 has a plurality of removing rollers 51 and 52 for transferring and removing fibers remaining on the surfaces of the felts 47 and 48, and a removing roller 51, Scrapers 53 and 54 (an example of a peeling member) for peeling the fibers transferred to the surface of 52 are provided.
  • the outer peripheral surfaces of the removing rollers 51 and 52 are finished to be smoother than the surfaces of the felts 47 and 48 and have excellent wettability, and rotate on the surfaces of the felts 47 and 48. Contact freely.
  • the outer peripheral surfaces of the removal rollers 51 and 52 are in sliding contact with the tips of the scrapers 53 and 54.
  • the removal rollers 51 and 52 are forcibly rotated by a rotation driving device such as a motor. Further, below the removal rollers 51 and 52, fiber receiving portions 55 and 56 for receiving fibers peeled off by the scrapers 53 and 54 are provided.
  • the drying unit 17 includes a pair of upper and lower rotatable endless transport belts 58 and 59 for transporting the wet paper 10 transferred from the press unit 16 to the finishing device 5 with both front and back surfaces interposed therebetween.
  • the upper conveyor belt 58 is wound around a plurality of rollers 60a to 60d
  • the lower conveyor belt 59 is wound around a plurality of rollers 61a to 61d.
  • the rollers 60b, 60c, 61a, and 61b have a function of a drying roller provided with a heating device 62 (heater) inside.
  • the used paper 7 As shown in FIGS. 1 to 3, by supplying the used paper 7 to the used paper recycling apparatus 1, the used paper 7 is cut by the cutting unit 8 of the used paper pulp manufacturing apparatus 2, and then separated by the pulper apparatus 9. A pulp suspension 12 is produced. Next, the pulp suspension 12 is deinked in the deinking device 3, and after printing components such as toner are removed, the paper is made in the papermaking device 4. Note that the deinking process by the deinking device 3 can be omitted.
  • any one of the rollers 20 to 22 of the wire portion 15 is forcibly rotated by the driving device, the other rollers are driven to rotate, and the paper making wire 18 rotates in one direction. .
  • the deinked pulp suspension 12 is supplied from the deinking device 3 to the head box 19 and further supplied from the head box 19 to the surface of the papermaking wire 18.
  • the pulp suspension 12 supplied onto the papermaking wire 18 is filtered and dehydrated in the dewatering path 25 to form a sheet-like wet paper 10 in which fibers are intertwined.
  • the filtrate 29 that has passed through the papermaking wire 18 from the front surface to the back surface in the dewatering path 25 is received by the receiving member 30 and flows to the discharge member 31 through the feed channel 32, and as shown in FIG. It is discharged from the discharge port 33 of 31 to the surface of the papermaking wire 18 in the return path 26. For this reason, the surface of the papermaking wire 18 is washed in the return path 26, and the fibers remaining on the surface of the papermaking wire 18 are washed away and removed. Thereby, the formation (homogeneity) of recycled paper obtained by papermaking is improved, and the occurrence of unevenness is prevented.
  • variety of the discharge port 33 is formed substantially the same as the width
  • the papermaking wire 18 is washed by reusing the filtrate 29 that has passed through the papermaking wire 18, the papermaking wire is used in comparison with the case where cleaning water (such as tap water) dedicated to washing is separately used.
  • the cleaning cost of 18 can be reduced.
  • the filtrate 29 received by the receiving member 30 flows to the discharge member 31 through the feed channel 32 by natural flow.
  • a pump or the like for sending the filtrate 29 from the member 30 to the discharge member 31 becomes unnecessary, and the cost is further reduced.
  • a part of the filtrate 29 discharged from the discharge member 31 to the surface of the papermaking wire 18 as described above is formed by the outer peripheral surface of the third roller 22 and the back surface of the papermaking wire 18.
  • the fibers on the surface of the papermaking wire 18 are released from the state in close contact with the surface of the papermaking wire 18 by the filtrate 29 collected in the gap portion 64 and slightly float.
  • the cleaning effect is improved.
  • the filtrate 29 discharged from the discharge member 31 to the papermaking wire 18 is temporarily received by the receiving tray 35, a certain amount of the filtrate 29 stays in the receiving tray 35, and the filtrate 29 remaining in the receiving tray 35 also causes the papermaking wire. 18 is washed. For this reason, the cleaning effect is further improved.
  • the cleaning water spray device 36 injects clean water 37 toward the back surface of the paper making wire 18 to raise the paper making wire 18. It is also possible to wash with water 37. Thereby, the fiber can be more reliably removed from the papermaking wire 18.
  • the filtrate 29 discharged from the discharge member 31 is stored in the white water tank 38 after washing the papermaking wire 18, and a part of the filtrate 29 is returned from the white water tank 38. And then returned to the pulper device 9.
  • the filtrate 29 in the white water tank 38 is diluted by the clean water 44, and the concentration of fibers contained in the filtrate 29 is lowered. Furthermore, by stirring the filtrate 29 in the white water tank 38 by the stirring device 41, the fibers precipitated at the bottom of the white water tank 38 are stirred and dispersed.
  • wet paper 10 generated in the wire part 15 as described above is transferred from the papermaking wire 18 of the wire part 15 to the felt 47 on the upper part of the press part 16 as shown in FIG. It is introduced between 48 and sandwiched and squeezed.
  • the rollers 49a to 49e, 50a to 50e, 51 and 52 rotate and the felts 47 and 48 rotate in one direction, and the fibers remaining on the surface of the upper felt 47 are removed from the upper removing roller. It is transferred to the outer peripheral surface of 51 and removed from the upper felt 47. Similarly, the fibers remaining on the surface of the lower felt 48 are transferred to the outer peripheral surface of the lower removing roller 52 and removed from the lower felt 48. At this time, since the outer peripheral surfaces of the removal rollers 51 and 52 are smoother than the surfaces of the felts 47 and 48, the fibers are captured (transferred) to the outer peripheral surfaces of the removal rollers 51 and 52.
  • the fibers transferred to the outer peripheral surfaces of the removing rollers 51 and 52 as described above are scraped off and removed from the removing rollers 51 and 52 by the scrapers 53 and 54 and received by the fiber receiving portions 55 and 56. .
  • the wet paper 10 compressed and dehydrated in the press unit 16 is transferred from the press unit 16 to the drying unit 17, and is sandwiched between a pair of upper and lower conveying belts 58 and 59 in the drying unit 17. Then, it is dried by the heat of the heating device 62 in the rollers 60b, 60c, 61a, 61b.
  • the wet paper 10 dried in the drying unit 17 is transferred from the drying unit 17 to the finishing device 5 and cut into a predetermined size in the finishing device 5, and as shown in FIG. The paper is discharged.
  • the discharge member 31 is provided at a position where the discharge port 33 faces the third roller 22 from above.
  • the second embodiment described below is used.
  • the discharge member 31 is provided at a position where the discharge port 33 faces the surface of the papermaking wire 18 in the second return path 26b from above.
  • a contact plate 66 slidably contacting the back surface (lower surface) of the paper making wire 18 in the return path 26b is provided between the first roller 20 and the third roller 22.
  • the backing plate 66 has substantially the same width as the papermaking wire 18 and faces the lower side of the discharge port 33. The paper making wire 18 rotates between the discharge port 33 and the contact plate 66 along the second return path 26b.
  • a receiving tray 35 for receiving the filtrate 29 discharged from the discharge port 33 toward the paper making wire 18 is provided between the side frames 24.
  • the filtrate 29 that has passed from the front surface to the back surface of the paper making wire 18 in the dewatering path 25 is received by the receiving member 30, flows to the discharge member 31 through the feed flow path 32, and flows from the discharge port 33 of the discharge member 31 to the return path 26. Released on the surface of the papermaking wire 18. For this reason, the surface of the papermaking wire 18 is washed in the return path 26, and the fibers remaining on the surface of the papermaking wire 18 are washed away and removed.
  • a minute gap portion 67 is formed between the upper surface of the backing plate 66 and the back surface of the papermaking wire 18, and the filtrate discharged from the discharge member 31 to the surface of the papermaking wire 18.
  • a portion of 29 accumulates in the gap portion 67.
  • the fibers on the surface of the papermaking wire 18 are released from the state in close contact with the surface of the papermaking wire 18 by the filtrate 29 accumulated in the gap portion 67 and slightly float.
  • the cleaning effect is improved.
  • the filtrate 29 discharged from the discharge member 31 to the papermaking wire 18 is temporarily received by the receiving tray 35, a certain amount of the filtrate 29 stays in the receiving tray 35, and the filtrate 29 remaining in the receiving tray 35 also causes the papermaking wire. 18 is washed. For this reason, the cleaning effect is further improved.
  • the removal roller 70 transfers and removes fibers remaining on the surface of the papermaking wire 18, and has the same configuration as the removal rollers 51 and 52 in the first embodiment. 18 is in contact with the surface of 18 in a rotatable manner. Moreover, the scraper 71 and the fiber receiving part 72 are the same structures as the scraper 53, 54 and the fiber receiving part 55, 56 in the first embodiment.
  • the fibers remaining on the surface of the papermaking wire 18 are transferred to the outer peripheral surface of the removing roller 70 and removed from the papermaking wire 18. This prevents fibers remaining on the papermaking wire 18 from adhering to the wet paper 10 on the downstream side and lowering the formation, thereby improving the formation of recycled paper obtained by papermaking.
  • the fibers transferred to the outer peripheral surface of the removing roller 70 as described above are scraped off from the removing roller 70 by the scraper 71 and peeled off and received by the fiber receiving portion 72.
  • the removal rollers 51, 52, 70, the scrapers 53, 54, 71, and the fiber receiving portions 55, 56, 72 may be provided in both the wire portion 15 and the press portion 16, or any of them. It may be provided only on one side.
  • the wire section 15 of the papermaking apparatus 4 is provided with a draining apparatus 75 that drains the wet paper 10 on the papermaking wire 18 in sliding contact with the back surface of the papermaking wire 18 in the dewatering path 25.
  • the draining device 75 is disposed below the paper making wire 18 and in the receiving member 30, and a plurality of draining devices 75 are arranged at predetermined intervals in the direction of the dewatering path 25.
  • Each draining device 75 includes a water absorbing member 76 that is in sliding contact with the back surface (lower surface) of the paper making wire 18 and a support member 77 that supports the water absorbing member 76.
  • a support member 77 that supports the water absorbing member 76.
  • the support member 77 is a metal plate and is provided between the side frames 24. Note that both end portions of the support member 77 in the longitudinal direction are supported by the side frame 24. Further, a gap 78 is formed between the lower end of the support member 77 and the bottom surface of the receiving member 30. Further, the water absorbing member 76 covers the upper end of the support member 77 and both front and rear surfaces in the direction of the dewatering path 25.
  • the pulp suspension 12 supplied from the head box 19 onto the papermaking wire 18 is filtered and dehydrated in a dewatering path 25 to form a sheet-like wet paper 10 in which fibers are intertwined.
  • the filtrate 29 that has passed through the paper making wire 18 from the front surface to the back surface is removed from the back surface of the paper making wire 18 by the draining device 75.
  • the filtrate 29 is substantially uniformly absorbed by the water absorbing member 76 that is in sliding contact with the back surface of the papermaking wire 18 and dispersed in the water absorbing member 76.
  • Each draining device 81 is composed of a blade 82 and a water absorbing member 83 that are in sliding contact with the back surface (lower surface) of the paper making wire 18.
  • the blade 82 is a metal plate-like member and is provided between the side frames 24. Both end portions of the blade 82 in the longitudinal direction are supported by the side frame 24. The upper end of the blade 82 is in sliding contact with the back surface of the papermaking wire 18. Further, the water absorbing member 83 is attached to the upstream surface of the dewatering path 25 of the blade 82. The upper end of the water absorbing member 83 is in sliding contact with the back surface of the papermaking wire 18.
  • felt or sponge is used for the water absorbing member 83.
  • the water absorbing member 83 is attached to the surface of the upstream side in the spin-drying
  • the first roller 20 of the wire portion 15 of the paper making apparatus 4 is positioned directly below the head box 19 on the dewatering path 25.
  • the first roller 20 includes a circular roller main body 86 and an annular water absorbing member 87 provided on the outer periphery of the roller main body 86.
  • the roller body 86 is made of metal, resin, or the like, and is rotatably provided.
  • the water absorbing member 87 is made of a flexible member having water absorption, such as a sponge.
  • the water-absorbing member 87 is elastically expandable / contractible in the radial direction, and as shown in FIG. 16, the contact portion 88 that is in contact with the papermaking wire 18 is reduced, and the remaining portion that is not in contact with the papermaking wire 18.
  • the spaced-apart portion 89 is expanded and restored.
  • the pulp suspension 12 supplied from the head box 19 onto the paper making wire 18 is filtered in the dewatering path 25.
  • the sheet-shaped wet paper 10 in which the fibers are entangled with each other is obtained.
  • the water absorbing member 87 of the first roller 20 is pressed and compressed by the papermaking wire 18 at the abutting portion 88 to be reduced. Deform.
  • the moisture 90 contained in the water absorbent member 87 is squeezed out, and the squeezed moisture 90 flows down along the inclined front and back surfaces of the papermaking wire 18, thereby washing the papermaking wire 18.
  • the water absorbing member 87 is expanded and deformed at the separated portion 89 to restore the original diameter.
  • the filtrate 29 that has passed through the papermaking wire 18 is sucked into the water absorbent member 87 when the water absorbent member 87 expands and deforms from the reduced deformed state. For this reason, dehydration is promoted, and the dewatering efficiency of the wet paper 10 is improved.
  • the pulp suspension 12 is supplied from the head box 19 onto the papermaking wire 18, the fiber in the pulp suspension 12 becomes difficult to move on the papermaking wire 18 due to the promotion of dehydration, and is obtained by papermaking. The formation of the recycled paper 11 is improved.
  • the first roller 20 is composed of the roller main body 86 and the water absorbing member 87.
  • Another intermediate roller 91 is provided between the roller 21 and the intermediate roller 91. And may be configured.
  • the three rollers 20 to 22 are provided in the wire portion 15 of the paper making apparatus 4, but a plurality other than the three may be provided.
  • the used paper recycling processing apparatus 1 using the used paper 7 as a raw material is shown, but the invention is not limited to the used paper recycling processing apparatus 1.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

A paper device in which a paper wire (18) in an endless shape pivots, and a pulp suspension (12) is supplied on the paper wire (18), and filtrated and dehydrated, wherein a cleaning device (28) for cleaning the paper wire (18) is provided; and wherein the cleaning device (28) discharges filtrate (29) which has passed through the paper wire (18) in a dehydration route (25) to the paper wire (18) in a return route (26), thereby cleaning the paper wire (18).

Description

抄紙装置および製紙装置Paper making apparatus and paper making apparatus
　本発明は、抄紙ベルトを有する抄紙装置、および、抄紙装置を備えた製紙装置に関する。 The present invention relates to a papermaking apparatus having a papermaking belt and a papermaking apparatus provided with the papermaking apparatus.
　従来、図１８，図１９Ａ，図１９Ｂに示すように、抄紙装置１００は、複数のローラ１０１間に回動自在に巻回された抄紙ワイヤー１０２（抄紙ベルト）と、パルプ懸濁液１０３を抄紙ワイヤー１０２上に供給するヘッドボックス１０４とを有しており、抄紙ワイヤー１０２が一方向へ回動し、パルプ懸濁液１０３がヘッドボックス１０４から抄紙ワイヤー１０２上に供給されて濾過脱水されるように構成されている。 Conventionally, as shown in FIGS. 18, 19A, and 19B, a paper making apparatus 100 makes a paper making wire 102 (paper making belt) wound around a plurality of rollers 101 and a pulp suspension 103 into paper. A head box 104 to be supplied onto the wire 102, the paper making wire 102 is rotated in one direction, and the pulp suspension 103 is supplied from the head box 104 onto the paper making wire 102 to be filtered and dehydrated. It is configured.
　抄紙ワイヤー１０２の回動経路は、ヘッドボックス１０４から供給されたパルプ懸濁液１０３を濾過脱水する上位の脱水経路１０６と、脱水経路１０６の下流側から上流側へ反転して戻る下位の戻り経路１０７とを備えている。 The rotation path of the papermaking wire 102 includes an upper dewatering path 106 for filtering and dewatering the pulp suspension 103 supplied from the head box 104, and a lower return path that reverses and returns from the downstream side to the upstream side of the dewatering path 106. 107.
　また、抄紙装置１００には、戻り経路１０７の抄紙ワイヤー１０２の裏面に対して高圧水１０８を噴出して抄紙ワイヤー１０２を洗浄する洗浄装置１０９が設けられている。また、高圧水１０８には水道水が使用されている。尚、上記のような洗浄装置を備えた抄紙装置については、例えば下記特許文献１の日本国公開特許公報に記載されている。 Further, the papermaking apparatus 100 is provided with a cleaning device 109 for cleaning the papermaking wire 102 by jetting high-pressure water 108 to the back surface of the papermaking wire 102 in the return path 107. In addition, tap water is used as the high-pressure water 108. In addition, about the papermaking apparatus provided with the above washing | cleaning apparatuses, it describes in the Japanese patent publication of the following patent document 1, for example.
　これによると、パルプ懸濁液１０３は、ヘッドボックス１０４から回動する抄紙ワイヤー１０２上に供給され、脱水経路１０６において濾過脱水される。これにより、パルプ懸濁液１０３は繊維同士が絡み合ったシート状の湿紙１１１となる。この際、洗浄装置１０９は、戻り経路１０７の抄紙ワイヤー１０２の裏面に高圧水１０８を噴出して、抄紙ワイヤー１０２を洗浄する。 According to this, the pulp suspension 103 is supplied onto the papermaking wire 102 rotating from the head box 104 and filtered and dehydrated in the dewatering path 106. Thereby, the pulp suspension 103 becomes a sheet-like wet paper 111 in which fibers are entangled with each other. At this time, the cleaning device 109 jets high-pressure water 108 to the back surface of the papermaking wire 102 in the return path 107 to clean the papermaking wire 102.
　また、抄紙装置１００には、脱水経路１０６において、抄紙ワイヤー１０２の裏面に摺接して抄紙ワイヤー１０２上の湿紙１１１の水切りを行うブレード１１２（水切り装置）が複数備えられている。尚、水切り用のブレードを備えた抄紙装置については、例えば下記特許文献２の日本国公開特許公報に記載されている。 Further, the papermaking apparatus 100 is provided with a plurality of blades 112 (water draining apparatuses) that drain the wet paper 111 on the papermaking wire 102 in sliding contact with the back surface of the papermaking wire 102 in the dewatering path 106. Note that a paper making apparatus provided with a blade for draining is described in, for example, Japanese Patent Publication No.
　これによると、脱水経路１０６において、抄紙ワイヤー１０２を通過（透過）した濾液１１３はブレード１１２によって抄紙ワイヤー１０２の裏面から除去される。 According to this, in the dewatering path 106, the filtrate 113 that has passed (permeated) the papermaking wire 102 is removed from the back surface of the papermaking wire 102 by the blade 112.
特開２００３－２８６６７４JP 2003-286664 A 特開平６－３２２６９２JP-A-6-322692
　しかしながら、上記の従来形式では、図１８に示すように、高圧水１０８に水道水が使用されているため、抄紙ワイヤー１０２の洗浄に必要な水道水の使用量が増大し、洗浄コストが高くなるという問題がある。 However, in the above conventional format, as shown in FIG. 18, tap water is used for the high-pressure water 108, so the amount of tap water used for cleaning the papermaking wire 102 increases and the cleaning cost increases. There is a problem.
　また、上記の従来形式では、図１９Ｂに示すように、濾液１１３はブレード１１２を伝って下方へ流下する際に局部的に分布し、これに伴って、抄紙ワイヤー１０２上の湿紙１１１中に含まれる繊維の密度も不均一となる。このため、湿紙１１１に繊維密度の高い部分１１４と低い部分１１５とが発生し、その結果、抄紙によって得られる紙の地合（均質性）が低下し、紙にむらが発生するという問題がある。 Further, in the above-described conventional format, as shown in FIG. 19B, the filtrate 113 is locally distributed when flowing down through the blade 112, and accordingly, in the wet paper 111 on the papermaking wire 102. The density of the contained fibers is also non-uniform. For this reason, the wet paper 111 has a portion 114 having a high fiber density and a portion 115 having a low fiber density. As a result, the formation (homogeneity) of the paper obtained by papermaking is lowered, and the paper is uneven. is there.
　さらに、上記のようにブレード１１２を用いて、濾液１１３を抄紙ワイヤー１０２の裏面から除去することで、湿紙１１１に対する脱水効率をある程度まで保つことができるが、湿紙の脱水効率をさらに向上させることは困難であるという問題がある。 Further, by removing the filtrate 113 from the back surface of the papermaking wire 102 using the blade 112 as described above, the dewatering efficiency of the wet paper 111 can be maintained to some extent, but the dewatering efficiency of the wet paper is further improved. There is a problem that it is difficult.
　本発明は、良質な紙を低コストで効率良く得ることが可能な抄紙装置および製紙装置を提供することを目的とするものである。 An object of the present invention is to provide a papermaking apparatus and a papermaking apparatus that can efficiently obtain good quality paper at low cost.
　上記目的を達成するために、本第１発明は、無端状の抄紙ベルトが濾過脱水部に設けられ、抄紙ベルトが回動して、繊維を含むパルプ懸濁液が供給部から抄紙ベルト上に供給されて濾過脱水される抄紙装置であって、
抄紙ベルトの回動経路は、供給部から供給されたパルプ懸濁液を濾過脱水する脱水経路と、濾過脱水により生成された湿紙を後段の次工程部へ移送した後に脱水経路の下流側から上流側へ戻る戻り経路とを備え、
抄紙ベルトを洗浄する洗浄装置が設けられ、
洗浄装置は、脱水経路において抄紙ベルトを通過した濾液を、戻り経路の抄紙ベルトに放出するものである。 In order to achieve the above object, according to the first aspect of the present invention, an endless papermaking belt is provided in the filtration and dewatering unit, the papermaking belt rotates, and a pulp suspension containing fibers is transferred from the supply unit onto the papermaking belt. A paper machine that is supplied and filtered and dehydrated,
The papermaking belt rotation path includes a dewatering path for filtering and dewatering the pulp suspension supplied from the supply section, and a downstream side of the dewatering path after transferring the wet paper generated by the filtration dewatering to the next process section at the subsequent stage. With a return path back to the upstream side,
A cleaning device for cleaning the papermaking belt is provided,
The washing device discharges the filtrate that has passed through the papermaking belt in the dewatering path to the papermaking belt in the return path.
　これによると、パルプ懸濁液は、供給部から回動する抄紙ベルトに供給され、脱水経路において濾過脱水される。これにより、パルプ懸濁液から繊維同士が絡み合ったシート状の湿紙が生成される。この際、洗浄装置は、脱水経路において抄紙ベルトを通過した濾液を、戻り経路の抄紙ベルトに放出する。このため、戻り経路において抄紙ベルトが洗浄され、抄紙ベルトに残留した繊維が洗い流されて除去される。これにより、抄紙によって得られる紙の地合（均質性）が向上し、むらの発生が防止される。 According to this, the pulp suspension is supplied from the supply unit to the rotating papermaking belt and filtered and dehydrated in the dewatering path. Thereby, a sheet-like wet paper in which fibers are intertwined from the pulp suspension is generated. At this time, the cleaning device discharges the filtrate that has passed through the papermaking belt in the dewatering path to the papermaking belt in the return path. For this reason, the papermaking belt is washed in the return path, and the fibers remaining on the papermaking belt are washed away and removed. Thereby, the formation (homogeneity) of the paper obtained by papermaking is improved, and the occurrence of unevenness is prevented.
　また、上記のように抄紙ベルトを通過した濾液を再利用して抄紙ベルトを洗浄するため、洗浄専用の洗浄水（水道水等）を別途使用する場合に比べて、抄紙ベルトの洗浄コストが低減される。 In addition, as the papermaking belt is washed by reusing the filtrate that has passed through the papermaking belt as described above, the washing cost of the papermaking belt is reduced compared to the case where separate washing water (such as tap water) is used separately. Is done.
　本第２発明における抄紙装置は、洗浄装置は、濾液を受ける受け部材と、濾液を放出する放出部材と、受け部材で受けられた濾液を放出部材へ導く送り流路とを有し、
放出部材は受け部材よりも下位に配置されているものである。 In the papermaking apparatus according to the second invention, the cleaning device has a receiving member that receives the filtrate, a discharging member that discharges the filtrate, and a feed channel that guides the filtrate received by the receiving member to the discharging member,
The discharge member is disposed below the receiving member.
　これによると、脱水経路において抄紙ベルトを通過した濾液は、受け部材に受けられ、送り流路を通って放出部材へ流れ、放出部材から抄紙ベルトに放出される。この際、放出部材は受け部材よりも下位に配置されているため、受け部材に受けられた濾液は自然流下により送り流路を通って放出部材へ流れる。これにより、濾液を受け部材から放出部材へ送るためのポンプ等が不要となり、コストが削減される。 According to this, the filtrate that has passed through the papermaking belt in the dewatering path is received by the receiving member, flows to the discharging member through the feed channel, and is discharged from the discharging member to the papermaking belt. At this time, since the discharge member is disposed below the receiving member, the filtrate received by the receiving member flows to the discharge member through the feed flow path by natural flow. This eliminates the need for a pump or the like for sending the filtrate from the member to the discharge member, thereby reducing the cost.
　本第３発明における抄紙装置は、抄紙ベルトは複数の回転自在なローラに巻回され、
洗浄装置は戻り経路にあるローラに向けて濾液を放出するものである。 In the papermaking apparatus according to the third invention, the papermaking belt is wound around a plurality of rotatable rollers,
The cleaning device discharges the filtrate toward the roller in the return path.
　これによると、洗浄装置から抄紙ベルトの表面に放出された濾液の一部はローラの外周面と抄紙ベルトの裏面との間隙部分に溜まる。そして、抄紙ベルトの表面の繊維は、上記間隙部分に溜まった濾液によって、抄紙ベルトの表面に密着した状態から開放されて僅かに浮き上がる。このように、繊維は、抄紙ベルトの表面から僅かに浮き上がった状態で、洗浄装置から放出された濾液により流し取られるため、洗浄効果が向上する。 According to this, a part of the filtrate discharged from the cleaning device to the surface of the papermaking belt is collected in a gap portion between the outer peripheral surface of the roller and the back surface of the papermaking belt. Then, the fibers on the surface of the papermaking belt are released from the state of being in close contact with the surface of the papermaking belt by the filtrate collected in the gap portion, and slightly float. Thus, since the fibers are slightly lifted from the surface of the papermaking belt and are washed away by the filtrate discharged from the cleaning device, the cleaning effect is improved.
　本第４発明における抄紙装置は、抄紙ベルトの下方に、濾液を貯留する貯留部が設けられ、
繊維を含まない上水を貯留部に供給する上水供給部と、貯留部内の濾液を攪拌する攪拌装置とが設けられているものである。 In the papermaking apparatus according to the fourth aspect of the present invention, a storage part for storing the filtrate is provided below the papermaking belt,
An upper water supply unit for supplying upper water containing no fibers to the storage unit and an agitation device for stirring the filtrate in the storage unit are provided.
　これによると、上水を上水供給部から貯留部に供給することにより、貯留部に貯留された濾液が上水により希釈され、濾液中に含まれる繊維濃度が低下する。さらに、攪拌装置により貯留部内の濾液を攪拌することで、貯留部の底部に沈殿している繊維が攪拌されて分散される。 According to this, by supplying clean water from the clean water supply part to the storage part, the filtrate stored in the storage part is diluted with clean water, and the fiber concentration contained in the filtrate is lowered. Further, by stirring the filtrate in the storage unit with the stirring device, the fibers precipitated at the bottom of the storage unit are stirred and dispersed.
　したがって、濾液を貯留部から取り出して再利用したり或は廃棄する場合、上記のように繊維濃度を低下させるとともに繊維を分散させておくことにより、濾液を取り出すための流路に設けられた配管や弁、ポンプ等に繊維が詰まってしまうのを防止することができる。 Therefore, when the filtrate is taken out from the reservoir and reused or discarded, the pipe provided in the flow path for taking out the filtrate by reducing the fiber concentration and dispersing the fibers as described above. It is possible to prevent clogging of fibers in the valve, valve, pump and the like.
　本第５発明における抄紙装置は、濾過脱水部の後段に、次工程部としてプレス部が設けられ、
プレス部に、濾過脱水部から移送された湿紙を表裏両面から挟んで搾水する一対の回動自在な無端状の吸水ベルトが設けられ、
吸水ベルトと抄紙ベルトとの少なくともいずれかの表面に残留した繊維を転写して除去する除去ローラと、除去ローラの表面に転写された繊維を剥離させる剥離部材とが設けられ、
除去ローラは吸水ベルトと抄紙ベルトとの少なくともいずれかの表面に回転自在に当接しているものである。 In the papermaking apparatus according to the fifth aspect of the invention, a press section is provided as a next process section after the filtration dehydration section.
The press unit is provided with a pair of rotatable endless water-absorbing belts that squeeze the wet paper transferred from the filtration and dehydration unit from both the front and back surfaces,
A removal roller that transfers and removes fibers remaining on at least one surface of the water absorption belt and the papermaking belt, and a peeling member that peels off the fibers transferred to the surface of the removal roller are provided,
The removing roller is in contact with at least one of the surface of the water absorbing belt and the papermaking belt so as to be rotatable.
　これによると、濾過脱水部において濾過され脱水された湿紙は、濾過脱水部の抄紙ベルトからプレス部の吸水ベルトに転写され、一対の吸水ベルト間に挟まれて搾水される。吸水ベルト又は抄紙ベルトの表面に残留した繊維は、除去ローラに転写され、吸水ベルト又は抄紙ベルトから除去される。これにより、吸水ベルトに残存した繊維が下流側の湿紙に付着して地合が低下することは防止され、抄紙によって得られる紙の地合が向上する。 According to this, the wet paper filtered and dehydrated in the filtration dehydration unit is transferred from the papermaking belt of the filtration dehydration unit to the water absorption belt of the press unit, and is squeezed between the pair of water absorption belts. The fibers remaining on the surface of the water absorbing belt or the papermaking belt are transferred to the removing roller and removed from the water absorbing belt or the papermaking belt. As a result, the fibers remaining on the water absorbing belt are prevented from adhering to the wet paper on the downstream side and the formation is lowered, and the formation of the paper obtained by papermaking is improved.
　また、上記のようにして除去ローラに転写された繊維は剥離部材によって除去ローラの表面から剥離される。 Also, the fibers transferred to the removing roller as described above are peeled off from the surface of the removing roller by the peeling member.
　本第６発明における抄紙装置は、無端状の抄紙ベルトが濾過脱水部に設けられ、抄紙ベルトが回動して、繊維を含むパルプ懸濁液が供給部から抄紙ベルト上に供給されて濾過脱水される抄紙装置であって、
抄紙ベルトの裏面に摺接して抄紙ベルト上の湿紙の水切りを行う水切り装置が備えられ、
水切り装置は抄紙ベルトの裏面に摺接する吸水性部材を有するものである。 In the papermaking apparatus according to the sixth aspect of the present invention, an endless papermaking belt is provided in the filtration dewatering unit, the papermaking belt rotates, and a pulp suspension containing fibers is supplied from the supply unit onto the papermaking belt. A paper making apparatus,
A draining device that drains wet paper on the papermaking belt in sliding contact with the backside of the papermaking belt is provided.
The draining device has a water absorbing member that is in sliding contact with the back surface of the papermaking belt.
　これによると、パルプ懸濁液は、供給部から回動する抄紙ベルトに供給されて濾過脱水され、繊維同士が絡み合ったシート状の湿紙となる。このとき、抄紙ベルトを通過した濾液は水切り装置によって抄紙ベルトの裏面から除去される。この際、濾液は、抄紙ベルトの裏面に摺接している吸水性部材によりほぼ均一に吸水されて、吸水性部材内に分散する。 According to this, the pulp suspension is supplied to a papermaking belt rotating from the supply unit, filtered and dehydrated, and becomes a sheet-like wet paper in which fibers are intertwined. At this time, the filtrate that has passed through the papermaking belt is removed from the back surface of the papermaking belt by a draining device. At this time, the filtrate is substantially uniformly absorbed by the water-absorbing member that is in sliding contact with the back surface of the papermaking belt, and is dispersed in the water-absorbing member.
　これにより、濾液が水切り装置と抄紙ベルトの裏面との間隙に局部的に分布するのを防止することができる。このため、抄紙ベルト上の湿紙に含まれる繊維密度が均一化され、抄紙によって得られる紙の地合（均質性）が向上する。 Thereby, it is possible to prevent the filtrate from being locally distributed in the gap between the draining device and the back surface of the papermaking belt. For this reason, the fiber density contained in the wet paper on the papermaking belt is made uniform, and the formation (homogeneity) of the paper obtained by papermaking is improved.
　本第７発明における抄紙装置は、無端状の抄紙ベルトが濾過脱水部に設けられ、抄紙ベルトが回動して、繊維を含むパルプ懸濁液が供給部から抄紙ベルト上に供給されて濾過脱水される抄紙装置であって、
抄紙ベルトの回動経路は、供給部から供給されたパルプ懸濁液を濾過脱水する脱水経路と、濾過脱水により生成された湿紙を後段の次工程部へ移送した後に脱水経路の下流側から上流側へ戻る戻り経路とを備え、
抄紙ベルトは複数の回転自在なローラに巻回され、
脱水経路上において供給部の下方に位置するローラと供給部よりも下流側に位置するローラとの少なくともいずれかのローラは、ローラ本体と、ローラ本体の外周に設けられた吸水性部材とを有し、
吸水性部材は、径方向において拡縮変形自在であり、抄紙ベルトに当接している当接部分が縮小され、抄紙ベルトに当接していない残りの離間部分が拡張されるものである。 In the papermaking apparatus according to the seventh aspect of the invention, an endless papermaking belt is provided in the filtration dewatering unit, the papermaking belt rotates, and a pulp suspension containing fibers is supplied from the supply unit onto the papermaking belt. A paper making apparatus,
The papermaking belt rotation path includes a dewatering path for filtering and dewatering the pulp suspension supplied from the supply section, and a downstream side of the dewatering path after transferring the wet paper generated by the filtration dewatering to the next process section at the subsequent stage. With a return path to the upstream side,
The papermaking belt is wound around multiple rotatable rollers,
At least one of the roller positioned below the supply unit and the roller positioned downstream of the supply unit on the dewatering path includes a roller body and a water absorbing member provided on the outer periphery of the roller body. And
The water-absorbing member is expandable / contractable in the radial direction, and a contact portion that is in contact with the papermaking belt is reduced, and a remaining separation portion that is not in contact with the papermaking belt is expanded.
　これによると、パルプ懸濁液は、供給部から回動する抄紙ベルトに供給されて濾過脱水され、繊維同士が絡み合ったシート状の湿紙となる。この際、脱水経路上において供給部の下方に位置するローラ（又は、脱水経路上において供給部よりも下流側に位置するローラ）が回転する。このローラの回転に伴って、上記ローラの吸水性部材は、抄紙ベルトに当接する当接部分において、抄紙ベルトにより押圧され圧縮されて縮小変形し、抄紙ベルトから離間する離間部分において、拡張変形して元の径に復元する。これにより、抄紙ベルトを通過した濾液は、吸水性部材が縮小変形した状態から拡張変形する際に、吸水性部材に吸い取られる。このため、ローラの吸水性部材の拡縮を利用して脱水が促進され、湿紙の脱水効率が向上する。 According to this, the pulp suspension is supplied to a papermaking belt rotating from the supply unit, filtered and dehydrated, and becomes a sheet-like wet paper in which fibers are intertwined. At this time, a roller positioned below the supply unit on the dehydration path (or a roller positioned on the downstream side of the supply unit on the dehydration path) rotates. As the roller rotates, the water-absorbing member of the roller is pressed and compressed by the papermaking belt at the abutting portion that contacts the papermaking belt, and is deformed to be reduced. To restore the original diameter. As a result, the filtrate that has passed through the papermaking belt is sucked into the water absorbent member when the water absorbent member is expanded and deformed from a reduced deformation state. For this reason, dehydration is promoted by utilizing the expansion and contraction of the water absorbing member of the roller, and the dewatering efficiency of the wet paper is improved.
　本第８発明は、上記第１発明から第７発明のいずれか１項に記載の抄紙装置を備えたことを特徴とする製紙装置である。 The eighth invention is a papermaking apparatus comprising the papermaking apparatus according to any one of the first to seventh inventions.
　以上のように本発明によると、良質な紙を低コストで効率良く得ることが可能である。 As described above, according to the present invention, it is possible to efficiently obtain good quality paper at low cost.
本発明の第１の実施の形態における製紙装置の主要構成を示す概略図である。It is the schematic which shows the main structures of the paper manufacturing apparatus in the 1st Embodiment of this invention. 同、製紙装置の主要構成を示すブロック図である。2 is a block diagram showing the main configuration of the paper making apparatus. FIG. 同、製紙装置の抄紙装置の主要構成を示す概略図である。It is the schematic which shows the main structures of the paper making apparatus of a paper manufacturing apparatus. 同、抄紙装置のワイヤー部の斜視図である。It is a perspective view of the wire part of a papermaking apparatus. 同、抄紙装置のワイヤー部の一部切欠き側面図である。It is a partially cutaway side view of the wire part of the paper making apparatus. 同、抄紙装置のワイヤー部の洗浄装置およびその周辺部分の拡大側面図である。FIG. 3 is an enlarged side view of the wire cleaning device and its peripheral portion of the paper making apparatus. 同、抄紙装置のワイヤー部の平面図である。It is a top view of the wire part of a papermaking apparatus. 同、抄紙装置のワイヤー部の洗浄装置の放出部材およびその周辺部分の拡大側面図である。It is an enlarged side view of the discharge | release member of the washing | cleaning apparatus of the wire part of a papermaking apparatus, and its peripheral part. 同、抄紙装置の除去ローラおよびその周辺部分の拡大側面図である。It is an enlarged side view of the removal roller and its peripheral part of the paper making apparatus. 同、抄紙装置の除去ローラおよびその周辺部分の拡大側面図である。It is an enlarged side view of the removal roller and its peripheral part of the paper making apparatus. 本発明の第２の実施の形態における抄紙装置のワイヤー部の側面図である。It is a side view of the wire part of the papermaking apparatus in the 2nd Embodiment of this invention. 同、抄紙装置のワイヤー部の洗浄装置の放出部材およびその周辺部分の拡大側面図である。It is an enlarged side view of the discharge | release member of the washing | cleaning apparatus of the wire part of a papermaking apparatus, and its peripheral part. 本発明の第３の実施の形態における抄紙装置のワイヤー部の側面図である。It is a side view of the wire part of the papermaking apparatus in the 3rd Embodiment of this invention. 本発明の第４の実施の形態における抄紙装置のワイヤー部の側面図である。It is a side view of the wire part of the papermaking apparatus in the 4th Embodiment of this invention. 同、抄紙装置のワイヤー部に設けられた水切り装置の側面図である。It is a side view of the draining device provided in the wire part of the papermaking apparatus. 図１４ＡにおけるＸ－Ｘ矢視図である。FIG. 14B is a view on arrow XX in FIG. 14A. 本発明の第５の実施の形態における抄紙装置の水切り装置の側面図である。It is a side view of the draining device of the papermaking apparatus in the 5th Embodiment of this invention. 本発明の第６の実施の形態における抄紙装置のヘッドボックスとローラおよびその周辺部分の拡大側面図である。It is an enlarged side view of the head box and roller of the paper making apparatus in the 6th Embodiment of this invention, and its peripheral part. 同、抄紙装置のローラ単体の拡大側面図である。FIG. 3 is an enlarged side view of a single roller of the paper making apparatus. 従来の抄紙装置のワイヤー部の側面図である。It is a side view of the wire part of the conventional papermaking apparatus. 同、抄紙装置に設けられた水切り用のブレードの側面図である。It is a side view of the blade for draining provided in the papermaking apparatus. 図１９ＡにおけるＸ－Ｘ矢視図である。FIG. 19B is a view on arrow XX in FIG. 19A.
　（第１の実施の形態）
　以下、本発明の第１の実施の形態を、図面を参照して説明する。図１，図２は製紙装置の一例である古紙再生処理装置１の構成を示す概略図とブロック図である。古紙再生処理装置１は古紙パルプ製造装置２と脱墨装置３と抄紙装置４と仕上げ装置５と排液処理装置６とを一体的に備える小型のものである。 (First embodiment)
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings. 1 and 2 are a schematic diagram and a block diagram showing the configuration of a used paper recycling processing apparatus 1 which is an example of a papermaking apparatus. The used paper recycling processing apparatus 1 is a small one that integrally includes a used paper pulp manufacturing apparatus 2, a deinking apparatus 3, a paper making apparatus 4, a finishing apparatus 5, and a drainage processing apparatus 6.
　古紙パルプ製造装置２は、古紙７を裁断する裁断部８と、裁断された古紙７を離解して繊維を含むパルプ懸濁液１２（図３参照）を製造するパルパー装置９とを備えている。また、脱墨装置３は、パルパー装置９において製造されたパルプ懸濁液１２を脱墨するものである。尚、古紙再生処理装置１は、脱墨装置３を備えているが、備えていないものでもよい。 The used paper pulp manufacturing apparatus 2 includes a cutting unit 8 that cuts the used paper 7, and a pulper device 9 that releases the cut used paper 7 to produce a pulp suspension 12 (see FIG. 3) containing fibers. . The deinking device 3 deinks the pulp suspension 12 produced in the pulper device 9. In addition, although the used paper reproduction | regeneration processing apparatus 1 is provided with the deinking apparatus 3, it may not be provided.
　図３に示すように、抄紙装置４は、脱墨装置３において脱墨されたパルプ懸濁液１２を抄紙し、抄紙により得られた湿紙１０を乾燥するものである。仕上げ装置５は、抄紙装置４において湿紙１０を乾燥したものを所定のサイズに裁断等することにより仕上げを行って再生紙１１を得るものである。また、排液処理装置６は脱墨装置３と抄紙装置４においてそれぞれ生じた排液を処理するものである。 As shown in FIG. 3, the paper making device 4 makes the pulp suspension 12 deinked in the deinking device 3, and dries the wet paper 10 obtained by the paper making. The finishing device 5 performs finishing by cutting the wet paper 10 dried in the paper making device 4 into a predetermined size, and obtains recycled paper 11. Further, the drainage treatment device 6 is for treating the drainage generated in each of the deinking device 3 and the papermaking device 4.
　抄紙装置４は、上流側から下流側の順に、パルプ懸濁液１２から湿紙１０を生成するワイヤー部１５（濾過脱水部の一例）と、湿紙１０を圧搾脱水するプレス部１６と、湿紙１０を乾燥させる乾燥部１７とを有している。 The paper making apparatus 4 includes, in order from the upstream side to the downstream side, a wire unit 15 (an example of a filtration dewatering unit) that generates the wet paper 10 from the pulp suspension 12, a press unit 16 that compresses and dehydrates the wet paper 10, And a drying unit 17 for drying the paper 10.
　以下に、ワイヤー部１５の構成を説明する。 Hereinafter, the configuration of the wire portion 15 will be described.
　図４～図８に示すように、ワイヤー部１５には無端状の抄紙ワイヤー１８（抄紙ベルトの一例）が設けられている。抄紙ワイヤー１８が一方向へ回動して、繊維を含むパルプ懸濁液１２が、ヘッドボックス１９（供給部の一例）から抄紙ワイヤー１８上に供給されて、濾過脱水される。 4 to 8, the wire portion 15 is provided with an endless paper-making wire 18 (an example of a paper-making belt). The papermaking wire 18 rotates in one direction, and the pulp suspension 12 containing fibers is supplied from the head box 19 (an example of a supply unit) onto the papermaking wire 18 and is filtered and dehydrated.
　抄紙ワイヤー１８は、通水性を有するメッシュ構造のベルトであり、例えば金属製又は樹脂製の網等からなるベルトである。抄紙ワイヤー１８は複数の回転自在なローラ２０～２２に巻回されている。ワイヤー部１５には一対のサイドフレーム２４が設けられ、各ローラ２０～２２は一対のサイドフレーム２４間に設けられている。このうち、第１のローラ２０はヘッドボックス１９の液供給口２３の真下に位置し、第２のローラ２１は第１のローラ２０の後方に位置している。また、第３のローラ２２は、上記両ローラ２０，２１よりも下位で、且つ、第１のローラ２０よりも前方に位置している。 The paper making wire 18 is a belt having a mesh structure having water permeability, for example, a belt made of a metal or resin net or the like. The papermaking wire 18 is wound around a plurality of rotatable rollers 20-22. The wire portion 15 is provided with a pair of side frames 24, and the rollers 20 to 22 are provided between the pair of side frames 24. Among these, the first roller 20 is located immediately below the liquid supply port 23 of the head box 19, and the second roller 21 is located behind the first roller 20. Further, the third roller 22 is positioned lower than the two rollers 20 and 21 and in front of the first roller 20.
　尚、各ローラ２０～２２のいずれかはモータ等の駆動装置により強制的に回転駆動される。また、各ローラ２０～２２の幅は抄紙ワイヤー１８の幅よりも若干大きく形成されている。 Any one of the rollers 20 to 22 is forcibly rotated by a driving device such as a motor. The widths of the rollers 20 to 22 are slightly larger than the width of the papermaking wire 18.
　図６に示すように、抄紙ワイヤー１８の回動経路は、ヘッドボックス１９から供給されたパルプ懸濁液１２を濾過脱水する脱水経路２５と、濾過脱水により生成された湿紙１０を後段のプレス部１６（次工程部の一例）へ移送した後に脱水経路２５の下流側から上流側へ反転して戻る戻り経路２６とを備えている。脱水経路２５は第１のローラ２０と第２のローラ２１との間に水平方向に形成されている。また、戻り経路２６は、第２のローラ２１と第３のローラ２２との間に傾斜して形成された第１の戻り経路２６ａと、第３のローラ２２と第１のローラ２０との間に傾斜して形成された第２の戻り経路２６ｂとを有している。 As shown in FIG. 6, the rotation path of the papermaking wire 18 includes a dewatering path 25 for filtering and dewatering the pulp suspension 12 supplied from the head box 19, and a press on the wet paper 10 generated by the filtering dewatering. And a return path 26 that is reversed from the downstream side of the dewatering path 25 to the upstream side after being transferred to the section 16 (an example of the next process section). The dewatering path 25 is formed in the horizontal direction between the first roller 20 and the second roller 21. In addition, the return path 26 is formed between the first return path 26 a formed to be inclined between the second roller 21 and the third roller 22, and between the third roller 22 and the first roller 20. And a second return path 26b formed so as to be inclined.
　ワイヤー部１５には、抄紙ワイヤー１８を洗浄する洗浄装置２８が設けられている。洗浄装置２８は、脱水経路２５において抄紙ワイヤー１８の表面から裏面へ通過した濾液２９を、戻り経路２６の抄紙ワイヤー１８の表面に放出するものである。尚、抄紙ワイヤー１８の表面とは、ヘッドボックス１９からパルプ懸濁液１２が供給される側の面である。 The wire unit 15 is provided with a cleaning device 28 for cleaning the papermaking wire 18. The cleaning device 28 discharges the filtrate 29 that has passed from the front surface to the back surface of the papermaking wire 18 in the dewatering path 25 to the surface of the papermaking wire 18 in the return path 26. The surface of the papermaking wire 18 is a surface on the side where the pulp suspension 12 is supplied from the head box 19.
　洗浄装置２８は、濾液２９を受ける皿状（底の浅い箱状）の受け部材３０と、濾液２９を放出する放出部材３１と、受け部材３０で受けられた濾液２９を放出部材３１へ導く送り流路３２とを有する。受け部材３０は脱水経路２５における抄紙ワイヤー１８の下方に配置されており、受け部材３０の幅は抄紙ワイヤー１８の幅と同じか又は抄紙ワイヤー１８の幅よりも若干大きく形成されている。 The cleaning device 28 is a dish-shaped (shallow box-shaped) receiving member 30 that receives the filtrate 29, a discharge member 31 that discharges the filtrate 29, and a feed that guides the filtrate 29 received by the receiving member 30 to the discharge member 31. And a flow path 32. The receiving member 30 is disposed below the papermaking wire 18 in the dewatering path 25, and the width of the receiving member 30 is the same as or slightly larger than the width of the papermaking wire 18.
　放出部材３１は、下端部に放出口３３を有しており、受け部材３０よりも下位に配置されている。放出口３３の幅は抄紙ワイヤー１８の幅とほぼ同じ又は同一に形成されている。また、送り流路３２は配管からなり、送り流路３２の上端が受け部材３０の底部に連通し、下端が放出部材３１の上部に連通している。尚、図８に示すように、放出口３３は上方から第３のローラ２２（戻り経路にあるローラの一例）の外周面に対向配置されており、これにより、濾液２９が放出口３３から第３のローラ２２に向けて放出される。 The discharge member 31 has a discharge port 33 at the lower end and is disposed below the receiving member 30. The width of the discharge port 33 is substantially the same as or the same as the width of the papermaking wire 18. The feed channel 32 is made of piping, and the upper end of the feed channel 32 communicates with the bottom of the receiving member 30 and the lower end communicates with the upper portion of the discharge member 31. As shown in FIG. 8, the discharge port 33 is disposed so as to face the outer peripheral surface of the third roller 22 (an example of a roller in the return path) from above, so that the filtrate 29 flows from the discharge port 33 to the first. It is discharged toward the third roller 22.
　また、一対のサイドフレーム２４の前端間に設けられた一方の端部フレーム３４には、放出口３３から第３のローラ２２に向けて放出された濾液２９を受け止める受け皿３５が設けられている。 Also, a receiving tray 35 for receiving the filtrate 29 discharged from the discharge port 33 toward the third roller 22 is provided on one end frame 34 provided between the front ends of the pair of side frames 24.
　また、一対のサイドフレーム２４間には、第１の戻り経路２６ａにおける抄紙ワイヤー１８の裏面に向けて上水３７（水道水等）を噴射する洗浄水噴射装置３６が設けられている。 Further, between the pair of side frames 24, there is provided a cleaning water injection device 36 for injecting clean water 37 (tap water or the like) toward the back surface of the papermaking wire 18 in the first return path 26a.
　抄紙ワイヤー１８の下方には、濾液２９を貯留する白水タンク３８（貯留部の一例）が設けられている。尚、濾液２９は、繊維を含んだ白色の液体であるため、白水とも呼ばれる。また、一対のサイドフレーム２４の後端間には他方の端部フレーム３９が設けられている。この他方の端部フレーム３９には、繊維を含まない上水４４（水道水等）を白水タンク３８に供給する上水供給部４０が設けられている。また、白水タンク３８内には、濾液２９を攪拌する攪拌装置４１が設けられている。 A white water tank 38 (an example of a storage unit) that stores the filtrate 29 is provided below the papermaking wire 18. The filtrate 29 is also called white water because it is a white liquid containing fibers. The other end frame 39 is provided between the rear ends of the pair of side frames 24. The other end frame 39 is provided with a water supply unit 40 that supplies water 44 (tap water or the like) that does not contain fibers to the white water tank 38. A stirring device 41 for stirring the filtrate 29 is provided in the white water tank 38.
　白水タンク３８の前端部（すなわち上水供給部４０とは反対側の端部）の底部には、白水タンク３８内の濾液２９をパルパー装置９に返送する返送流路４２が接続されている。返送流路４２は配管からなり、一端が白水タンク３８の底面に連通し、他端がパルパー装置９に連通している。尚、返送流路４２には弁やポンプ等が設けられている。また、白水タンク３８内には、白水タンク３８の底面を形成する傾斜板４３が設けられている。傾斜板４３は、上水供給部４０側の一端部が上位で且つ返送流路４２側の他端部が下位になるように傾斜している。 A return passage 42 for returning the filtrate 29 in the white water tank 38 to the pulper device 9 is connected to the bottom of the front end of the white water tank 38 (that is, the end opposite to the water supply unit 40). The return flow path 42 is made of piping, and one end communicates with the bottom surface of the white water tank 38 and the other end communicates with the pulper device 9. The return flow path 42 is provided with a valve, a pump, and the like. An inclined plate 43 that forms the bottom surface of the white water tank 38 is provided in the white water tank 38. The inclined plate 43 is inclined such that one end on the water supply section 40 side is higher and the other end on the return flow path 42 side is lower.
　図３に示すように、プレス部１６には、ワイヤー部１５から移送された湿紙１０を表裏両面から挟んで搾水する上下一対の回動自在な無端状のフェルト４７，４８（吸水ベルトの一例）が設けられている。上部のフェルト４７は複数のローラ４９ａ～４９ｅに巻回されているベルトである。下部のフェルト４８は複数のローラ５０ａ～５０ｅに巻回されているベルトである。このうち、上下で相対向する一対のローラ４９ｂ，５０ｂおよびローラ４９ｃ，５０ｃは双方のフェルト４７，４８を挟んで圧搾する圧搾ローラの機能を有している。尚、ローラ４９ａ～４９ｅのいずれかとローラ５０ａ～５０ｅのいずれかとはそれぞれモータ等の駆動装置で強制的に回転駆動される。 As shown in FIG. 3, the press unit 16 includes a pair of upper and lower rotatable endless felts 47 and 48 that squeeze the wet paper 10 transferred from the wire unit 15 from both the front and back surfaces. An example) is provided. The upper felt 47 is a belt wound around a plurality of rollers 49a to 49e. The lower felt 48 is a belt wound around a plurality of rollers 50a to 50e. Among these, the pair of rollers 49b and 50b and the rollers 49c and 50c opposed to each other in the vertical direction have a function of a squeezing roller that squeezes both the felts 47 and 48 therebetween. Any one of the rollers 49a to 49e and any one of the rollers 50a to 50e are forcibly rotated by a driving device such as a motor.
　また、図３，図９Ａ，図９Ｂに示すように、プレス部１６には、フェルト４７，４８の表面に残留した繊維を転写して除去する複数の除去ローラ５１，５２と、除去ローラ５１，５２の表面に転写された繊維を剥離させるスクレーパー５３，５４（剥離部材の一例）とが設けられている。 Also, as shown in FIGS. 3, 9A and 9B, the press unit 16 has a plurality of removing rollers 51 and 52 for transferring and removing fibers remaining on the surfaces of the felts 47 and 48, and a removing roller 51, Scrapers 53 and 54 (an example of a peeling member) for peeling the fibers transferred to the surface of 52 are provided.
　各除去ローラ５１，５２の外周面は、フェルト４７，４８の表面と比較してより平滑（ツルツル）な面に仕上げられて優れた濡れ性を有しており、フェルト４７，４８の表面に回転自在に当接している。また、各除去ローラ５１，５２の外周面はスクレーパー５３，５４の先端に摺接している。尚、各除去ローラ５１，５２はそれぞれモータ等の回転駆動装置によって強制的に回転駆動される。また、各除去ローラ５１，５２の下方には、スクレーパー５３，５４により剥離された繊維を受け止める繊維受け部５５，５６が設けられている。 The outer peripheral surfaces of the removing rollers 51 and 52 are finished to be smoother than the surfaces of the felts 47 and 48 and have excellent wettability, and rotate on the surfaces of the felts 47 and 48. Contact freely. The outer peripheral surfaces of the removal rollers 51 and 52 are in sliding contact with the tips of the scrapers 53 and 54. The removal rollers 51 and 52 are forcibly rotated by a rotation driving device such as a motor. Further, below the removal rollers 51 and 52, fiber receiving portions 55 and 56 for receiving fibers peeled off by the scrapers 53 and 54 are provided.
　図３に示すように、乾燥部１７には、プレス部１６から移送された湿紙１０を表裏両面から挟んで仕上げ装置５へ搬送する上下一対の回動自在な無端状の搬送ベルト５８，５９が設けられている。上部の搬送ベルト５８は複数のローラ６０ａ～６０ｄに巻回され、下部の搬送ベルト５９は複数のローラ６１ａ～６１ｄに巻回されている。このうち、ローラ６０ｂ，６０ｃ，６１ａ，６１ｂは内部に加熱装置６２（ヒーター）を備えた乾燥用ローラの機能を有している。 As shown in FIG. 3, the drying unit 17 includes a pair of upper and lower rotatable endless transport belts 58 and 59 for transporting the wet paper 10 transferred from the press unit 16 to the finishing device 5 with both front and back surfaces interposed therebetween. Is provided. The upper conveyor belt 58 is wound around a plurality of rollers 60a to 60d, and the lower conveyor belt 59 is wound around a plurality of rollers 61a to 61d. Among these, the rollers 60b, 60c, 61a, and 61b have a function of a drying roller provided with a heating device 62 (heater) inside.
　以下、上記構成における作用を説明する。 Hereinafter, the operation of the above configuration will be described.
　図１～図３に示すように、古紙７を古紙再生処理装置１に供給することにより、古紙７は、古紙パルプ製造装置２の裁断部８において裁断された後、パルパー装置９において離解されてパルプ懸濁液１２が生成される。次に、パルプ懸濁液１２は、脱墨装置３において脱墨され、トナー等の印刷成分が除去された後、抄紙装置４において抄紙される。尚、脱墨装置３による脱墨工程を省略することも可能である。 As shown in FIGS. 1 to 3, by supplying the used paper 7 to the used paper recycling apparatus 1, the used paper 7 is cut by the cutting unit 8 of the used paper pulp manufacturing apparatus 2, and then separated by the pulper apparatus 9. A pulp suspension 12 is produced. Next, the pulp suspension 12 is deinked in the deinking device 3, and after printing components such as toner are removed, the paper is made in the papermaking device 4. Note that the deinking process by the deinking device 3 can be omitted.
　この際、ワイヤー部１５のローラ２０～２２のいずれかのローラが駆動装置により強制的に回転駆動するとともに、その他のローラが従動的に回転し、且つ、抄紙ワイヤー１８が一方向へ回動する。 At this time, any one of the rollers 20 to 22 of the wire portion 15 is forcibly rotated by the driving device, the other rollers are driven to rotate, and the paper making wire 18 rotates in one direction. .
　図６に示すように、脱墨されたパルプ懸濁液１２は、脱墨装置３からヘッドボックス１９へ供給され、さらに、ヘッドボックス１９から抄紙ワイヤー１８の表面に供給される。このようにして抄紙ワイヤー１８上に供給されたパルプ懸濁液１２は、脱水経路２５において濾過脱水され、繊維同士が絡み合ったシート状の湿紙１０となる。 As shown in FIG. 6, the deinked pulp suspension 12 is supplied from the deinking device 3 to the head box 19 and further supplied from the head box 19 to the surface of the papermaking wire 18. In this way, the pulp suspension 12 supplied onto the papermaking wire 18 is filtered and dehydrated in the dewatering path 25 to form a sheet-like wet paper 10 in which fibers are intertwined.
　このとき、脱水経路２５において抄紙ワイヤー１８の表面から裏面へ通過した濾液２９は、受け部材３０に受けられ、送り流路３２を通って放出部材３１へ流れ、図８に示すように、放出部材３１の放出口３３から戻り経路２６の抄紙ワイヤー１８の表面に放出される。このため、戻り経路２６において抄紙ワイヤー１８の表面が洗浄され、抄紙ワイヤー１８の表面に残留した繊維が洗い流されて除去される。これにより、抄紙によって得られる再生紙の地合（均質性）が向上し、むらの発生が防止される。尚、放出口３３の幅は抄紙ワイヤー１８の幅とほぼ同じ又は同一に形成されているため、抄紙ワイヤー１８を全幅にわたって確実に洗浄することができる。 At this time, the filtrate 29 that has passed through the papermaking wire 18 from the front surface to the back surface in the dewatering path 25 is received by the receiving member 30 and flows to the discharge member 31 through the feed channel 32, and as shown in FIG. It is discharged from the discharge port 33 of 31 to the surface of the papermaking wire 18 in the return path 26. For this reason, the surface of the papermaking wire 18 is washed in the return path 26, and the fibers remaining on the surface of the papermaking wire 18 are washed away and removed. Thereby, the formation (homogeneity) of recycled paper obtained by papermaking is improved, and the occurrence of unevenness is prevented. In addition, since the width | variety of the discharge port 33 is formed substantially the same as the width | variety of the papermaking wire 18, the papermaking wire 18 can be reliably wash | cleaned over the full width.
　また、上記のように抄紙ワイヤー１８を透過した濾液２９を再利用して抄紙ワイヤー１８の表面を洗浄するため、洗浄専用の洗浄水（水道水等）を別途使用する場合に比べて、抄紙ワイヤー１８の洗浄コストを低減することができる。 Further, as described above, since the surface of the papermaking wire 18 is washed by reusing the filtrate 29 that has passed through the papermaking wire 18, the papermaking wire is used in comparison with the case where cleaning water (such as tap water) dedicated to washing is separately used. The cleaning cost of 18 can be reduced.
　また、放出部材３１は受け部材３０よりも下位に配置されているため、受け部材３０に受けられた濾液２９は自然流下により送り流路３２を通って放出部材３１へ流れる。これにより、濾液２９を受け部材３０から放出部材３１へ送るためのポンプ等が不要となり、コストがさらに削減される。 In addition, since the discharge member 31 is disposed below the receiving member 30, the filtrate 29 received by the receiving member 30 flows to the discharge member 31 through the feed channel 32 by natural flow. As a result, a pump or the like for sending the filtrate 29 from the member 30 to the discharge member 31 becomes unnecessary, and the cost is further reduced.
　また、図８に示すように、上記のように放出部材３１から抄紙ワイヤー１８の表面に放出された濾液２９の一部は第３のローラ２２の外周面と抄紙ワイヤー１８の裏面とで形成される鋭角の間隙部分６４に溜まり、抄紙ワイヤー１８の表面の繊維が、上記間隙部分６４に溜まった濾液２９によって、抄紙ワイヤー１８の表面に密着した状態から開放されて僅かに浮き上がる。このように、繊維は、抄紙ワイヤー１８の表面から僅かに浮き上がった状態で、放出部材３１から放出された濾液２９により流し取られるため、洗浄効果が向上する。 Further, as shown in FIG. 8, a part of the filtrate 29 discharged from the discharge member 31 to the surface of the papermaking wire 18 as described above is formed by the outer peripheral surface of the third roller 22 and the back surface of the papermaking wire 18. The fibers on the surface of the papermaking wire 18 are released from the state in close contact with the surface of the papermaking wire 18 by the filtrate 29 collected in the gap portion 64 and slightly float. Thus, since the fibers are slightly lifted from the surface of the papermaking wire 18 and are washed away by the filtrate 29 discharged from the discharge member 31, the cleaning effect is improved.
　さらに、放出部材３１から抄紙ワイヤー１８に放出された濾液２９は受け皿３５に一旦受け止められるため、ある程度の量の濾液２９が受け皿３５内に留まり、受け皿３５内に留まっている濾液２９によっても抄紙ワイヤー１８が洗浄される。このため、洗浄効果がさらに向上する。 Further, since the filtrate 29 discharged from the discharge member 31 to the papermaking wire 18 is temporarily received by the receiving tray 35, a certain amount of the filtrate 29 stays in the receiving tray 35, and the filtrate 29 remaining in the receiving tray 35 also causes the papermaking wire. 18 is washed. For this reason, the cleaning effect is further improved.
　また、適時（例えば所定時間毎あるいは古紙再生処理装置１を所定回数運転する毎）に、洗浄水噴射装置３６から抄紙ワイヤー１８の裏面に向けて上水３７を噴射して、抄紙ワイヤー１８を上水３７で洗浄することも可能である。これにより、繊維を抄紙ワイヤー１８からより確実に除去することができる。 Further, at an appropriate time (for example, every predetermined time or every time when the used paper recycling apparatus 1 is operated a predetermined number of times), the cleaning water spray device 36 injects clean water 37 toward the back surface of the paper making wire 18 to raise the paper making wire 18. It is also possible to wash with water 37. Thereby, the fiber can be more reliably removed from the papermaking wire 18.
　また、放出部材３１から放出された濾液２９は、図５に示すように、抄紙ワイヤー１８を洗浄した後、白水タンク３８内に貯留され、さらに、その一部が白水タンク３８から返送流路４２を通ってパルパー装置９へ返送される。 Further, as shown in FIG. 5, the filtrate 29 discharged from the discharge member 31 is stored in the white water tank 38 after washing the papermaking wire 18, and a part of the filtrate 29 is returned from the white water tank 38. And then returned to the pulper device 9.
　この際、上水４４を上水供給部４０から白水タンク３８に供給することにより、白水タンク３８内の濾液２９が上水４４により希釈され、濾液２９中に含まれる繊維濃度が低下する。さらに、攪拌装置４１により白水タンク３８内の濾液２９を攪拌することで、白水タンク３８の底部に沈殿している繊維が攪拌されて分散される。 At this time, by supplying the clean water 44 from the clean water supply unit 40 to the white water tank 38, the filtrate 29 in the white water tank 38 is diluted by the clean water 44, and the concentration of fibers contained in the filtrate 29 is lowered. Furthermore, by stirring the filtrate 29 in the white water tank 38 by the stirring device 41, the fibers precipitated at the bottom of the white water tank 38 are stirred and dispersed.
　上記のように、濾液２９中の繊維濃度を低下させるとともに繊維を分散させておくことにより、返送流路４２に設けられた配管や弁、ポンプ等に繊維が詰まってしまうのを防止することができる。また、白水タンク３８内の濾液２９中の繊維は傾斜板４３によって返送流路４２の開口端部に集められるため、白水タンク３８内の繊維が返送流路４２に流れ込み易くなり、白水タンク３８の底部に多量の繊維が堆積して残留することを防止できる。 As described above, by reducing the fiber concentration in the filtrate 29 and dispersing the fibers, it is possible to prevent the pipes, valves, pumps, etc. provided in the return flow path 42 from being clogged with fibers. it can. Further, since the fibers in the filtrate 29 in the white water tank 38 are collected by the inclined plate 43 at the opening end of the return flow path 42, the fibers in the white water tank 38 easily flow into the return flow path 42. It is possible to prevent a large amount of fibers from depositing and remaining on the bottom.
　また、上記のようにワイヤー部１５において生成された湿紙１０は、図３に示すように、ワイヤー部１５の抄紙ワイヤー１８上からプレス部１６の上部のフェルト４７に転写され、両フェルト４７，４８間に導入され挟まれて搾水される。 Further, the wet paper 10 generated in the wire part 15 as described above is transferred from the papermaking wire 18 of the wire part 15 to the felt 47 on the upper part of the press part 16 as shown in FIG. It is introduced between 48 and sandwiched and squeezed.
　この際、各ローラ４９ａ～４９ｅ，５０ａ～５０ｅ，５１，５２が回転するとともにフェルト４７，４８が一方向に回動しており、上部のフェルト４７の表面に残留した繊維は、上部の除去ローラ５１の外周面に転写されて、上部のフェルト４７から除去される。同様に、下部のフェルト４８の表面に残留した繊維は、下部の除去ローラ５２の外周面に転写されて、下部のフェルト４８から除去される。尚、このとき、除去ローラ５１，５２の外周面はフェルト４７，４８の表面より平滑であるので、繊維が除去ローラ５１，５２の外周面に捕捉（転写）される。 At this time, the rollers 49a to 49e, 50a to 50e, 51 and 52 rotate and the felts 47 and 48 rotate in one direction, and the fibers remaining on the surface of the upper felt 47 are removed from the upper removing roller. It is transferred to the outer peripheral surface of 51 and removed from the upper felt 47. Similarly, the fibers remaining on the surface of the lower felt 48 are transferred to the outer peripheral surface of the lower removing roller 52 and removed from the lower felt 48. At this time, since the outer peripheral surfaces of the removal rollers 51 and 52 are smoother than the surfaces of the felts 47 and 48, the fibers are captured (transferred) to the outer peripheral surfaces of the removal rollers 51 and 52.
　これにより、フェルト４７，４８に残存した繊維が下流側の湿紙１０に付着して地合（均質性）を低下させることを防止し、抄紙によって得られる再生紙の地合（均質性）が向上する。 This prevents fibers remaining in the felts 47 and 48 from adhering to the wet paper 10 on the downstream side and lowering the formation (homogeneity), and the formation (homogeneity) of recycled paper obtained by papermaking is reduced. improves.
　また、上記のようにして除去ローラ５１，５２の外周面に転写された繊維は、スクレーパー５３，５４によって、除去ローラ５１，５２から掻き取られて剥離され、繊維受け部５５，５６に受け止められる。 Further, the fibers transferred to the outer peripheral surfaces of the removing rollers 51 and 52 as described above are scraped off and removed from the removing rollers 51 and 52 by the scrapers 53 and 54 and received by the fiber receiving portions 55 and 56. .
　図３に示すように、プレス部１６において圧縮脱水された湿紙１０は、プレス部１６から乾燥部１７へ移送され、乾燥部１７において、上下一対の回動する搬送ベルト５８，５９間に挟まれて搬送されながら、ローラ６０ｂ，６０ｃ，６１ａ，６１ｂ内の加熱装置６２の熱で乾燥される。 As shown in FIG. 3, the wet paper 10 compressed and dehydrated in the press unit 16 is transferred from the press unit 16 to the drying unit 17, and is sandwiched between a pair of upper and lower conveying belts 58 and 59 in the drying unit 17. Then, it is dried by the heat of the heating device 62 in the rollers 60b, 60c, 61a, 61b.
　上記乾燥部１７において乾燥された湿紙１０は、乾燥部１７から仕上げ装置５へ移送され、仕上げ装置５において所定の大きさに裁断され、図１に示すように、再生紙１１として紙受け部に排紙される。 The wet paper 10 dried in the drying unit 17 is transferred from the drying unit 17 to the finishing device 5 and cut into a predetermined size in the finishing device 5, and as shown in FIG. The paper is discharged.
　（第２の実施の形態）
　上記第１の実施の形態では図６に示すように、放出口３３が上方から第３のローラ２２に対向する位置に放出部材３１が設けられているが、以下に説明する第２の実施の形態では、図１０，図１１に示すように、放出口３３が上方から第２の戻り経路２６ｂにおける抄紙ワイヤー１８の表面に対向する位置に放出部材３１が設けられている。 (Second Embodiment)
In the first embodiment, as shown in FIG. 6, the discharge member 31 is provided at a position where the discharge port 33 faces the third roller 22 from above. However, the second embodiment described below is used. In the embodiment, as shown in FIGS. 10 and 11, the discharge member 31 is provided at a position where the discharge port 33 faces the surface of the papermaking wire 18 in the second return path 26b from above.
　また、戻り経路２６ｂにおける抄紙ワイヤー１８の裏面（下面）に摺接自在な当て板６６が第１のローラ２０と第３のローラ２２との間に設けられている。当て板６６は、抄紙ワイヤー１８とほぼ同等の幅を有し、放出口３３の下方に相対向している。尚、抄紙ワイヤー１８は放出口３３と当て板６６との間を第２の戻り経路２６ｂに沿って回動する。 Further, a contact plate 66 slidably contacting the back surface (lower surface) of the paper making wire 18 in the return path 26b is provided between the first roller 20 and the third roller 22. The backing plate 66 has substantially the same width as the papermaking wire 18 and faces the lower side of the discharge port 33. The paper making wire 18 rotates between the discharge port 33 and the contact plate 66 along the second return path 26b.
　また、両サイドフレーム２４間には、放出口３３から抄紙ワイヤー１８に向けて放出された濾液２９を受け止める受け皿３５が設けられている。 Further, a receiving tray 35 for receiving the filtrate 29 discharged from the discharge port 33 toward the paper making wire 18 is provided between the side frames 24.
　以下、上記構成における作用を説明する。 Hereinafter, the operation of the above configuration will be described.
　脱水経路２５において抄紙ワイヤー１８の表面から裏面へ通過した濾液２９は、受け部材３０に受けられ、送り流路３２を通って放出部材３１へ流れ、放出部材３１の放出口３３から戻り経路２６の抄紙ワイヤー１８の表面に放出される。このため、戻り経路２６において抄紙ワイヤー１８の表面が洗浄され、抄紙ワイヤー１８の表面に残留した繊維が洗い流されて除去される。 The filtrate 29 that has passed from the front surface to the back surface of the paper making wire 18 in the dewatering path 25 is received by the receiving member 30, flows to the discharge member 31 through the feed flow path 32, and flows from the discharge port 33 of the discharge member 31 to the return path 26. Released on the surface of the papermaking wire 18. For this reason, the surface of the papermaking wire 18 is washed in the return path 26, and the fibers remaining on the surface of the papermaking wire 18 are washed away and removed.
　また、図１１に示すように、当て板６６の上面と抄紙ワイヤー１８の裏面との間には微小な間隙部分６７が形成されており、放出部材３１から抄紙ワイヤー１８の表面に放出された濾液２９の一部は上記間隙部分６７に溜まる。抄紙ワイヤー１８の表面の繊維は、上記間隙部分６７に溜まった濾液２９によって、抄紙ワイヤー１８の表面に密着した状態から開放されて僅かに浮き上がる。このように、繊維は、抄紙ワイヤー１８の表面から僅かに浮き上がった状態で、放出部材３１から放出された濾液２９により流し取られるため、洗浄効果が向上する。 Further, as shown in FIG. 11, a minute gap portion 67 is formed between the upper surface of the backing plate 66 and the back surface of the papermaking wire 18, and the filtrate discharged from the discharge member 31 to the surface of the papermaking wire 18. A portion of 29 accumulates in the gap portion 67. The fibers on the surface of the papermaking wire 18 are released from the state in close contact with the surface of the papermaking wire 18 by the filtrate 29 accumulated in the gap portion 67 and slightly float. Thus, since the fibers are slightly lifted from the surface of the papermaking wire 18 and are washed away by the filtrate 29 discharged from the discharge member 31, the cleaning effect is improved.
　さらに、放出部材３１から抄紙ワイヤー１８に放出された濾液２９は受け皿３５に一旦受け止められるため、ある程度の量の濾液２９が受け皿３５内に留まり、受け皿３５内に留まっている濾液２９によっても抄紙ワイヤー１８が洗浄される。このため、洗浄効果がさらに向上する。 Furthermore, since the filtrate 29 discharged from the discharge member 31 to the papermaking wire 18 is temporarily received by the receiving tray 35, a certain amount of the filtrate 29 stays in the receiving tray 35, and the filtrate 29 remaining in the receiving tray 35 also causes the papermaking wire. 18 is washed. For this reason, the cleaning effect is further improved.
　（第３の実施の形態）
　上記第１の実施の形態では図３に示すように、除去ローラ５１，５２とスクレーパー５３，５４と繊維受け部５５，５６とがプレス部１６に設けられているが、第３の実施の形態では、図１２に示すように、除去ローラ７０とスクレーパー７１（剥離部材の一例）と繊維受け部７２とがワイヤー部１５に設けられている。 (Third embodiment)
In the first embodiment, as shown in FIG. 3, the removing rollers 51 and 52, the scrapers 53 and 54, and the fiber receiving portions 55 and 56 are provided in the press portion 16, but the third embodiment Then, as shown in FIG. 12, a removal roller 70, a scraper 71 (an example of a peeling member), and a fiber receiving portion 72 are provided on the wire portion 15.
　除去ローラ７０は、抄紙ワイヤー１８の表面に残留した繊維を転写して除去するものであって、上記第１の実施の形態における除去ローラ５１，５２と同じ構成であり、戻り経路２６において抄紙ワイヤー１８の表面に回転自在に当接している。また、スクレーパー７１と繊維受け部７２とは、上記第１の実施の形態におけるスクレーパー５３，５４と繊維受け部５５，５６と同じ構成である。 The removal roller 70 transfers and removes fibers remaining on the surface of the papermaking wire 18, and has the same configuration as the removal rollers 51 and 52 in the first embodiment. 18 is in contact with the surface of 18 in a rotatable manner. Moreover, the scraper 71 and the fiber receiving part 72 are the same structures as the scraper 53, 54 and the fiber receiving part 55, 56 in the first embodiment.
　以下、上記構成における作用を説明する。 Hereinafter, the operation of the above configuration will be described.
　抄紙ワイヤー１８の表面に残留した繊維は、除去ローラ７０の外周面に転写され、抄紙ワイヤー１８から除去される。これにより、抄紙ワイヤー１８に残存した繊維が下流側の湿紙１０に付着して地合を低下させることを防止し、抄紙によって得られる再生紙の地合が向上する。 The fibers remaining on the surface of the papermaking wire 18 are transferred to the outer peripheral surface of the removing roller 70 and removed from the papermaking wire 18. This prevents fibers remaining on the papermaking wire 18 from adhering to the wet paper 10 on the downstream side and lowering the formation, thereby improving the formation of recycled paper obtained by papermaking.
　また、上記のようにして除去ローラ７０の外周面に転写された繊維は、スクレーパー７１によって、除去ローラ７０から掻き取られて剥離され、繊維受け部７２に受け止められる。 Further, the fibers transferred to the outer peripheral surface of the removing roller 70 as described above are scraped off from the removing roller 70 by the scraper 71 and peeled off and received by the fiber receiving portion 72.
　尚、上記各除去ローラ５１，５２，７０とスクレーパー５３，５４，７１と繊維受け部５５，５６，７２を、ワイヤー部１５とプレス部１６との両方に設けてもよいし、或は、いずれか片方のみに設けてもよい。 The removal rollers 51, 52, 70, the scrapers 53, 54, 71, and the fiber receiving portions 55, 56, 72 may be provided in both the wire portion 15 and the press portion 16, or any of them. It may be provided only on one side.
　（第４の実施の形態）
　以下、本発明の第４の実施の形態を、図１３，図１４Ａ，図１４Ｂを参照して説明する。 (Fourth embodiment)
Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS. 13, 14A, and 14B.
　抄紙装置４のワイヤー部１５には、脱水経路２５において抄紙ワイヤー１８の裏面に摺接して抄紙ワイヤー１８上の湿紙１０の水切りを行う水切り装置７５が備えられている。水切り装置７５は、抄紙ワイヤー１８の下方で且つ受け部材３０内に配置されており、脱水経路２５の方向に所定間隔おきに複数配列されている。 The wire section 15 of the papermaking apparatus 4 is provided with a draining apparatus 75 that drains the wet paper 10 on the papermaking wire 18 in sliding contact with the back surface of the papermaking wire 18 in the dewatering path 25. The draining device 75 is disposed below the paper making wire 18 and in the receiving member 30, and a plurality of draining devices 75 are arranged at predetermined intervals in the direction of the dewatering path 25.
　各水切り装置７５は、抄紙ワイヤー１８の裏面（下面）に摺接する吸水性部材７６と、吸水性部材７６を支持する支持部材７７とで構成されている。吸水性部材７６には、例えばフェルト又はスポンジ等が用いられている。支持部材７７は、金属製の板であり、両サイドフレーム２４間に設けられている。尚、支持部材７７の長手方向における両端部はサイドフレーム２４に支持されている。また、支持部材７７の下端と受け部材３０の底面との間には、間隙７８が形成されている。また、吸水性部材７６は、支持部材７７の上端と脱水経路２５の方向における前後両面とを覆っている。 Each draining device 75 includes a water absorbing member 76 that is in sliding contact with the back surface (lower surface) of the paper making wire 18 and a support member 77 that supports the water absorbing member 76. For the water absorbing member 76, for example, felt or sponge is used. The support member 77 is a metal plate and is provided between the side frames 24. Note that both end portions of the support member 77 in the longitudinal direction are supported by the side frame 24. Further, a gap 78 is formed between the lower end of the support member 77 and the bottom surface of the receiving member 30. Further, the water absorbing member 76 covers the upper end of the support member 77 and both front and rear surfaces in the direction of the dewatering path 25.
　以下、上記構成における作用を説明する。 Hereinafter, the operation of the above configuration will be described.
　ヘッドボックス１９から抄紙ワイヤー１８上に供給されたパルプ懸濁液１２は、脱水経路２５において濾過脱水され、繊維同士が絡み合ったシート状の湿紙１０となる。このとき、抄紙ワイヤー１８を表面から裏面へ通過した濾液２９は水切り装置７５によって抄紙ワイヤー１８の裏面から除去される。この際、濾液２９は、抄紙ワイヤー１８の裏面に摺接している吸水性部材７６によって、ほぼ均一に吸水されて吸水性部材７６内に分散する。 The pulp suspension 12 supplied from the head box 19 onto the papermaking wire 18 is filtered and dehydrated in a dewatering path 25 to form a sheet-like wet paper 10 in which fibers are intertwined. At this time, the filtrate 29 that has passed through the paper making wire 18 from the front surface to the back surface is removed from the back surface of the paper making wire 18 by the draining device 75. At this time, the filtrate 29 is substantially uniformly absorbed by the water absorbing member 76 that is in sliding contact with the back surface of the papermaking wire 18 and dispersed in the water absorbing member 76.
　これにより、濾液２９が水切り装置７５と抄紙ワイヤー１８の裏面との間隙に局部的に分布するのを防止することができる。このため、抄紙ワイヤー１８上の湿紙１０に含まれる繊維密度が均一化され、抄紙によって得られる再生紙１１の地合が向上する。 Thereby, it is possible to prevent the filtrate 29 from being locally distributed in the gap between the draining device 75 and the back surface of the papermaking wire 18. For this reason, the fiber density contained in the wet paper 10 on the paper making wire 18 is made uniform, and the formation of the recycled paper 11 obtained by paper making is improved.
　（第５の実施の形態）
　以下、本発明の第５の実施の形態を、図１５を参照して説明する。 (Fifth embodiment)
The fifth embodiment of the present invention will be described below with reference to FIG.
　各水切り装置８１は、抄紙ワイヤー１８の裏面（下面）に摺接するブレード８２および吸水性部材８３で構成されている。ブレード８２は、金属製の板状部材であり、両サイドフレーム２４間に設けられている。ブレード８２の長手方向における両端部はサイドフレーム２４に支持されている。ブレード８２の上端は抄紙ワイヤー１８の裏面に摺接する。また、吸水性部材８３は、ブレード８２の脱水経路２５における上流側の面に取り付けられている。吸水性部材８３の上端は抄紙ワイヤー１８の裏面に摺接する。尚、吸水性部材８３には、例えばフェルト又はスポンジ等が用いられている。 Each draining device 81 is composed of a blade 82 and a water absorbing member 83 that are in sliding contact with the back surface (lower surface) of the paper making wire 18. The blade 82 is a metal plate-like member and is provided between the side frames 24. Both end portions of the blade 82 in the longitudinal direction are supported by the side frame 24. The upper end of the blade 82 is in sliding contact with the back surface of the papermaking wire 18. Further, the water absorbing member 83 is attached to the upstream surface of the dewatering path 25 of the blade 82. The upper end of the water absorbing member 83 is in sliding contact with the back surface of the papermaking wire 18. For the water absorbing member 83, for example, felt or sponge is used.
　これによると、上記第４の実施の形態と同様の作用、効果が得られる。 According to this, the same operation and effect as the fourth embodiment can be obtained.
　尚、上記第５の実施の形態では、吸水性部材８３は、ブレード８２の脱水経路２５における上流側の面に取り付けられているが、反対側の下流側の面に取り付けられていてもよい。 In addition, in the said 5th Embodiment, although the water absorbing member 83 is attached to the surface of the upstream side in the spin-drying | dehydration path | route 25 of the braid | blade 82, you may attach to the downstream surface of the other side.
　（第６の実施の形態）
　以下、本発明の第６の実施の形態を、図１６，図１７を参照して説明する。 (Sixth embodiment)
Hereinafter, a sixth embodiment of the present invention will be described with reference to FIGS.
　図１６に示すように、抄紙装置４のワイヤー部１５の第１のローラ２０は、脱水経路２５上においてヘッドボックス１９の直下に位置している。図１７に示すように、第１のローラ２０は、円形状のローラ本体８６と、ローラ本体８６の外周に設けられた円環状の吸水性部材８７とを有している。ローラ本体８６は、金属や樹脂等で製作されており、回転自在に設けられている。 As shown in FIG. 16, the first roller 20 of the wire portion 15 of the paper making apparatus 4 is positioned directly below the head box 19 on the dewatering path 25. As shown in FIG. 17, the first roller 20 includes a circular roller main body 86 and an annular water absorbing member 87 provided on the outer periphery of the roller main body 86. The roller body 86 is made of metal, resin, or the like, and is rotatably provided.
　また、吸水性部材８７は、吸水性を有する柔軟な部材、例えばスポンジ等で製作されている。吸水性部材８７は、径方向において弾性的に拡縮変形自在であり、図１６に示すように、抄紙ワイヤー１８に当接している当接部分８８が縮小され、抄紙ワイヤー１８に当接していない残りの離間部分８９が拡張されて復元する。 Further, the water absorbing member 87 is made of a flexible member having water absorption, such as a sponge. The water-absorbing member 87 is elastically expandable / contractible in the radial direction, and as shown in FIG. 16, the contact portion 88 that is in contact with the papermaking wire 18 is reduced, and the remaining portion that is not in contact with the papermaking wire 18. The spaced-apart portion 89 is expanded and restored.
　以下、上記構成における作用を説明する。 Hereinafter, the operation of the above configuration will be described.
　第１～第３のローラ２０～２２が回転し、抄紙ワイヤー１８が回動している状態で、ヘッドボックス１９から抄紙ワイヤー１８上に供給されたパルプ懸濁液１２は、脱水経路２５において濾過脱水され、繊維同士が絡み合ったシート状の湿紙１０となる。 While the first to third rollers 20 to 22 are rotating and the paper making wire 18 is rotating, the pulp suspension 12 supplied from the head box 19 onto the paper making wire 18 is filtered in the dewatering path 25. The sheet-shaped wet paper 10 in which the fibers are entangled with each other is obtained.
　この際、図１６に示すように、第１のローラ２０の回転に伴って、第１のローラ２０の吸水性部材８７は、当接部分８８において、抄紙ワイヤー１８により押圧されて圧縮され、縮小変形する。この際、吸水性部材８７に含まれる水分９０が搾り出され、搾り出された水分９０は抄紙ワイヤー１８の傾斜した表裏面を伝って流下し、これにより、抄紙ワイヤー１８が洗浄される。 At this time, as shown in FIG. 16, as the first roller 20 rotates, the water absorbing member 87 of the first roller 20 is pressed and compressed by the papermaking wire 18 at the abutting portion 88 to be reduced. Deform. At this time, the moisture 90 contained in the water absorbent member 87 is squeezed out, and the squeezed moisture 90 flows down along the inclined front and back surfaces of the papermaking wire 18, thereby washing the papermaking wire 18.
　また、吸水性部材８７は、離間部分８９において、拡張変形して元の径に復元する。これにより、抄紙ワイヤー１８を通過した濾液２９は、吸水性部材８７が縮小変形した状態から拡張変形する際に、吸水性部材８７に吸い取られる。このため、脱水が促進され、湿紙１０の脱水効率が向上する。また、パルプ懸濁液１２がヘッドボックス１９から抄紙ワイヤー１８上に供給された際、脱水の促進により、パルプ懸濁液１２中の繊維が抄紙ワイヤー１８上で遊動し難くなり、抄紙によって得られる再生紙１１の地合が向上する。 Further, the water absorbing member 87 is expanded and deformed at the separated portion 89 to restore the original diameter. As a result, the filtrate 29 that has passed through the papermaking wire 18 is sucked into the water absorbent member 87 when the water absorbent member 87 expands and deforms from the reduced deformed state. For this reason, dehydration is promoted, and the dewatering efficiency of the wet paper 10 is improved. Further, when the pulp suspension 12 is supplied from the head box 19 onto the papermaking wire 18, the fiber in the pulp suspension 12 becomes difficult to move on the papermaking wire 18 due to the promotion of dehydration, and is obtained by papermaking. The formation of the recycled paper 11 is improved.
　上記第６の実施の形態では、第１のローラ２０はローラ本体８６と吸水性部材８７とで構成されているが、図３の仮想線で示すように、第１のローラ２０と第２のローラ２１との間に別の中間のローラ９１（脱水経路２５上においてヘッドボックス１９よりも下流側に位置するローラの一例）が設けられ、この中間のローラ９１がローラ本体８６と吸水性部材８７とで構成されていてもよい。 In the sixth embodiment, the first roller 20 is composed of the roller main body 86 and the water absorbing member 87. However, as shown by the phantom line in FIG. Another intermediate roller 91 (an example of a roller positioned on the downstream side of the head box 19 on the dewatering path 25) is provided between the roller 21 and the intermediate roller 91. And may be configured.
　上記各々の実施の形態では、抄紙装置４のワイヤー部１５に３個のローラ２０～２２が設けられているが、３個以外の複数個設けられていてもよい。 In each of the embodiments described above, the three rollers 20 to 22 are provided in the wire portion 15 of the paper making apparatus 4, but a plurality other than the three may be provided.
　上記各々の実施の形態では、製紙装置の一例として、古紙７を原料とする古紙再生処理装置１が示されているが、古紙再生処理装置１に限定されるものではない。 In each of the above embodiments, as an example of the paper making apparatus, the used paper recycling processing apparatus 1 using the used paper 7 as a raw material is shown, but the invention is not limited to the used paper recycling processing apparatus 1.

Claims (8)

  1. 無端状の抄紙ベルトが濾過脱水部に設けられ、抄紙ベルトが回動して、繊維を含むパルプ懸濁液が供給部から抄紙ベルト上に供給されて濾過脱水される抄紙装置であって、
    抄紙ベルトの回動経路は、供給部から供給されたパルプ懸濁液を濾過脱水する脱水経路と、濾過脱水により生成された湿紙を後段の次工程部へ移送した後に脱水経路の下流側から上流側へ戻る戻り経路とを備え、
    抄紙ベルトを洗浄する洗浄装置が設けられ、
    洗浄装置は、脱水経路において抄紙ベルトを通過した濾液を、戻り経路の抄紙ベルトに放出することを特徴とする抄紙装置。     An endless papermaking belt is provided in the filtration and dewatering unit, the papermaking belt rotates, and a pulp suspension containing fibers is supplied onto the papermaking belt from the supply unit and is filtered and dehydrated,
    The papermaking belt rotation path includes a dewatering path for filtering and dewatering the pulp suspension supplied from the supply section, and a downstream side of the dewatering path after transferring the wet paper generated by the filtration dewatering to the next process section at the subsequent stage. With a return path back to the upstream side,
    A cleaning device for cleaning the papermaking belt is provided,
    The cleaning device discharges the filtrate that has passed through the papermaking belt in the dewatering path to the papermaking belt in the return path.
  2. 洗浄装置は、濾液を受ける受け部材と、濾液を放出する放出部材と、受け部材で受けられた濾液を放出部材へ導く送り流路とを有し、
    放出部材は受け部材よりも下位に配置されていることを特徴とする請求項１に記載の抄紙装置。     The cleaning device includes a receiving member that receives the filtrate, a discharging member that discharges the filtrate, and a feed channel that guides the filtrate received by the receiving member to the discharging member,
    The paper making apparatus according to claim 1, wherein the discharge member is disposed below the receiving member.
  3. 抄紙ベルトは複数の回転自在なローラに巻回され、
    洗浄装置は戻り経路にあるローラに向けて濾液を放出することを特徴とする請求項１に記載の抄紙装置。     The papermaking belt is wound around multiple rotatable rollers,
    2. The paper making apparatus according to claim 1, wherein the cleaning device discharges the filtrate toward the roller in the return path.
  4. 抄紙ベルトの下方に、濾液を貯留する貯留部が設けられ、
    繊維を含まない上水を貯留部に供給する上水供給部と、貯留部内の濾液を攪拌する攪拌装置とが設けられていることを特徴とする請求項１に記載の抄紙装置。     Below the papermaking belt is provided a reservoir for storing the filtrate,
    The papermaking apparatus according to claim 1, further comprising: an upper water supply unit that supplies upper water that does not contain fibers to the storage unit; and a stirring device that stirs the filtrate in the storage unit.
  5. 濾過脱水部の後段に、次工程部としてプレス部が設けられ、
    プレス部に、濾過脱水部から移送された湿紙を表裏両面から挟んで搾水する一対の回動自在な無端状の吸水ベルトが設けられ、
    吸水ベルトと抄紙ベルトとの少なくともいずれかの表面に残留した繊維を転写して除去する除去ローラと、除去ローラの表面に転写された繊維を剥離させる剥離部材とが設けられ、
    除去ローラは吸水ベルトと抄紙ベルトとの少なくともいずれかの表面に回転自在に当接していることを特徴とする請求項１に記載の抄紙装置。     A press section is provided as the next process section after the filtration dewatering section.
    The press unit is provided with a pair of rotatable endless water-absorbing belts that squeeze the wet paper transferred from the filtration and dehydration unit from both the front and back surfaces,
    A removal roller that transfers and removes fibers remaining on at least one surface of the water absorption belt and the papermaking belt, and a peeling member that peels off the fibers transferred to the surface of the removal roller are provided,
    2. The paper making apparatus according to claim 1, wherein the removing roller is rotatably in contact with at least one surface of the water absorbing belt and the paper making belt.
  6. 無端状の抄紙ベルトが濾過脱水部に設けられ、抄紙ベルトが回動して、繊維を含むパルプ懸濁液が供給部から抄紙ベルト上に供給されて濾過脱水される抄紙装置であって、
    抄紙ベルトの裏面に摺接して抄紙ベルト上の湿紙の水切りを行う水切り装置が備えられ、
    水切り装置は抄紙ベルトの裏面に摺接する吸水性部材を有することを特徴とする抄紙装置。     An endless papermaking belt is provided in the filtration and dewatering unit, the papermaking belt rotates, and a pulp suspension containing fibers is supplied onto the papermaking belt from the supply unit and is filtered and dehydrated,
    A draining device that drains wet paper on the papermaking belt in sliding contact with the backside of the papermaking belt is provided.
    The paper draining apparatus has a water absorbing member that is in sliding contact with the back surface of the papermaking belt.
  7. 無端状の抄紙ベルトが濾過脱水部に設けられ、抄紙ベルトが回動して、繊維を含むパルプ懸濁液が供給部から抄紙ベルト上に供給されて濾過脱水される抄紙装置であって、
    抄紙ベルトの回動経路は、供給部から供給されたパルプ懸濁液を濾過脱水する脱水経路と、濾過脱水により生成された湿紙を後段の次工程部へ移送した後に脱水経路の下流側から上流側へ戻る戻り経路とを備え、
    抄紙ベルトは複数の回転自在なローラに巻回され、
    脱水経路上において供給部の下方に位置するローラと供給部よりも下流側に位置するローラとの少なくともいずれかのローラは、ローラ本体と、ローラ本体の外周に設けられた吸水性部材とを有し、
    吸水性部材は、径方向において拡縮変形自在であり、抄紙ベルトに当接している当接部分が縮小され、抄紙ベルトに当接していない残りの離間部分が拡張されることを特徴とする抄紙装置。     An endless papermaking belt is provided in the filtration and dewatering unit, the papermaking belt rotates, and a pulp suspension containing fibers is supplied onto the papermaking belt from the supply unit and is filtered and dehydrated,
    The papermaking belt rotation path includes a dewatering path for filtering and dewatering the pulp suspension supplied from the supply section, and a downstream side of the dewatering path after transferring the wet paper generated by the filtration dewatering to the next process section at the subsequent stage. With a return path to the upstream side,
    The papermaking belt is wound around multiple rotatable rollers,
    At least one of the roller positioned below the supply unit and the roller positioned downstream of the supply unit on the dewatering path includes a roller body and a water absorbing member provided on the outer periphery of the roller body. And
    The paper-absorbing member is capable of expanding and contracting in a radial direction, wherein a contact portion that is in contact with the paper-making belt is reduced, and a remaining separation portion that is not in contact with the paper-making belt is expanded. .
  8. 上記請求項１から請求項７のいずれか１項に記載の抄紙装置を備えたことを特徴とする製紙装置。
          A papermaking apparatus comprising the papermaking apparatus according to any one of claims 1 to 7.
PCT/JP2010/072076 2010-01-08 2010-12-09 Paper device and papermaking device WO2011083656A1 (en)

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CN110172853A (en) * 2019-06-05 2019-08-27 上海品务包装有限公司 A kind of paper machine forming net cleaning rotating-spray water-saving mechanism
CN110172853B (en) * 2019-06-05 2020-10-09 东阳温宾电子科技有限公司 Rotary jet water-saving mechanism for cleaning forming net of paper machine

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