JP5748409B2 - Paper making apparatus and paper making apparatus - Google Patents

Description

  The present invention relates to a papermaking apparatus having a papermaking wire and a papermaking apparatus provided with the papermaking apparatus.

  Conventionally, as this type of papermaking apparatus, for example, in FIGS. 18 and 19, a head in which a papermaking wire 102 is rotatably wound around a plurality of rollers 101 and a pulp suspension 103 is supplied onto the papermaking wire 102. A papermaking apparatus 100 is shown in which a box 104 is provided, the papermaking wire 102 rotates in one direction, and the pulp suspension 103 is supplied from the headbox 104 onto the papermaking wire 102 and filtered and dehydrated.

  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.

  Further, a cleaning device 109 for cleaning the papermaking wire 102 by jetting high-pressure water 108 on the back surface of the papermaking wire 102 in the return path 107 is provided. In addition, tap water is used as the high-pressure water 108. Incidentally, a paper making apparatus provided with the above-described cleaning apparatus is described in Patent Document 1 below.

  According to this, the pulp suspension 103 is supplied onto the papermaking wire 102 that rotates from the head box 104, and is filtered and dehydrated in the dewatering path 106, thereby forming a sheet-like wet paper 111 in which fibers are intertwined. . 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.

  As shown in FIGS. 18 and 19, the paper making apparatus 100 includes a blade 112 (water draining means) that drains the wet paper 111 on the paper making wire 102 in sliding contact with the back surface of the paper making wire 102 in the dewatering path 106. Are provided. Incidentally, a paper making apparatus provided with a blade for draining is described in Patent Document 2 below.

  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.

JP2003-286684A JP-A-6-322692

  However, in the above conventional format, as shown in FIG. 18, since tap water is used for the high-pressure water 108, the amount of tap water required for cleaning the papermaking wire 102 is increased, and the cleaning cost is increased. There's a problem.

  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 also becomes non-uniform, and a portion 114 with a high fiber density and a portion 115 with a low fiber density are generated. As a result, the formation of the paper obtained by papermaking is lowered, and the paper is uneven. There is.

  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.

  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.

In order to achieve the above object, the first invention has a wire portion provided with an endless papermaking wire, the papermaking wire is rotated, and a pulp suspension containing fibers is fed from the supply portion to the papermaking wire. A paper machine that is fed on and filtered and dehydrated,
The papermaking wire rotation path consists of 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 filtration and dewatering to the next process section in the subsequent stage. With a return path back to the upstream side,
A cleaning means for cleaning the papermaking wire is provided,
The cleaning means discharges the filtrate that has passed through the papermaking wire in the dewatering path to the papermaking wire in the return path.

  According to this, the pulp suspension is supplied to the papermaking wire that rotates from the supply unit, and is filtered and dehydrated in the dewatering path, thereby forming a sheet-like wet paper in which fibers are intertwined. At this time, the cleaning means discharges the filtrate that has passed through the papermaking wire in the dewatering path to the papermaking wire in the return path. For this reason, the papermaking wire is washed in the return path, and the fibers remaining on the papermaking wire are washed away and removed, thereby improving the formation (homogeneity) of the paper obtained by papermaking and the occurrence of unevenness. Is prevented.

  In addition, as the papermaking wire is cleaned by reusing the filtrate that has passed through the papermaking wire as described above, the cleaning cost of the papermaking wire is reduced compared to the case where separate cleaning water (such as tap water) is used separately. can do.

In the papermaking apparatus according to the second aspect of the invention, the cleaning means includes a receiving member that receives the filtrate, a discharging member that discharges the filtrate, and a feed passage that guides the filtrate received by the receiving member to the discharging member.
The discharge member is disposed below the receiving member.

  According to this, the filtrate that has passed through the papermaking wire in the dewatering path is received by the receiving member, flows through the feed channel to the discharging member, and is discharged from the discharging member to the papermaking wire. 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.

In the papermaking apparatus according to the third invention, the papermaking wire is wound around a plurality of rotatable rollers,
The cleaning means discharges the filtrate toward the roller in the return path.
According to this, a part of the filtrate discharged from the cleaning means to the surface of the papermaking wire is accumulated in the gap portion between the outer peripheral surface of the roller and the back surface of the papermaking wire, and the fibers on the surface of the papermaking wire are accumulated in the gap portion. By the filtrate, it is released from the state of being in close contact with the surface of the papermaking wire and slightly floats. Thus, since the fibers are slightly lifted from the surface of the papermaking wire and are washed away by the filtrate discharged from the cleaning means, the cleaning effect is improved.

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 wire,
An upper water supply unit for supplying upper water containing no fiber to the storage unit and an agitation unit for stirring the filtrate in the storage unit are provided.

  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 reduced. Further, by stirring the filtrate in the storage part by the stirring means, the fibers precipitated at the bottom of the storage part are stirred and dispersed.

  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.

In the papermaking apparatus according to the fifth aspect of the present invention, a press section is provided as a next process section after the wire section.
The press part is provided with a pair of rotatable endless water-absorbing belts that squeeze the wet paper transferred from the wire part from both the front and back sides,
A removal roller that transfers and removes fibers remaining on at least one surface of the water absorption belt and the paper making wire, 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 surfaces of the water absorbing belt and the paper making wire so as to be rotatable.

  According to this, the wet paper filtered and dehydrated in the wire part is transferred from the wire part to the water absorption belt of the press part, and is sandwiched between the pair of water absorption belts to be squeezed. The fibers remaining on the surface of the water absorbing belt or papermaking wire are transferred to a removing roller and removed from the water absorbing belt or papermaking wire. Thereby, it is possible to prevent the fibers remaining on the water absorption belt from adhering to the wet paper on the downstream side and lower the formation, and to improve the formation of the paper obtained by papermaking.

Further, the fibers transferred to the removing roller as described above are peeled off from the surface of the removing roller by the peeling member.
The papermaking apparatus according to the sixth invention has a wire portion provided with an endless papermaking wire, the papermaking wire is rotated, and a pulp suspension containing fibers is supplied onto the papermaking wire from the supply portion. A paper machine for filtration and dehydration,
A draining means for draining the wet paper on the papermaking wire in sliding contact with the backside of the papermaking wire is provided.
The draining means has a water absorbing member that is in sliding contact with the back surface of the papermaking wire.

  According to this, pulp suspension is supplied to the papermaking wire rotated from a supply part, is 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 wire is removed from the back surface of the papermaking wire by the draining means. 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 wire and is dispersed in the water-absorbing member.

  As a result, it is possible to prevent the filtrate from being locally distributed in the gap between the draining means and the back surface of the papermaking wire, so that the fiber density contained in the wet paper on the papermaking wire is made uniform and obtained by papermaking. Paper formation (homogeneity) can be improved.

The papermaking apparatus in the seventh invention has a wire portion provided with an endless papermaking wire, the papermaking wire is rotated, and a pulp suspension containing fibers is supplied from the supply portion onto the papermaking wire. A paper machine for filtration and dehydration,
The papermaking wire rotation path consists of 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 filtration and dewatering to the next process section in the subsequent stage. With a return path back to the upstream side,
The papermaking wire is wound around multiple rotatable rollers,
Of the plurality of rollers, the first roller located below the supply unit on the dehydration path has a roller body and a water absorbing member provided on the outer periphery of the roller body,
The water-absorbing member is expandable / contractible in the radial direction, the abutting portion that is in contact with the papermaking wire is reduced, and the remaining separated portion that is not in contact with the papermaking wire is expanded,
The papermaking wire is located below the first roller on the return path and from the roller located upstream of the first roller in the direction opposite to the direction of wet paper transport by the papermaking wire from the first roller to the first roller. It is inclined obliquely upward.

  According to this, pulp suspension is supplied to the papermaking wire rotated from a supply part, is 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, and the water absorbing member of the roller is rotated along with this rotation. In the abutting portion that abuts on the papermaking wire, it is deformed by being reduced by being pressed by the papermaking wire, and in the separated portion that is separated from the papermaking wire, it is expanded and restored to its original diameter. As a result, the filtrate that has passed through the papermaking wire is sucked when the water absorbent member is expanded and deformed from the reduced deformation state. improves.

  The eighth invention is a papermaking apparatus comprising the papermaking apparatus according to any one of the first to seventh inventions.

  As described above, according to the present invention, it is possible to efficiently obtain good quality paper at low cost.

It is the schematic which shows the main structures of the paper manufacturing apparatus in the 1st Embodiment of this invention. 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 cleaning means for the wire portion of the paper making apparatus and its peripheral portion. It is a top view of the wire part of a papermaking apparatus. It is an enlarged side view of the discharge | release member of the washing | cleaning means of the wire part of a papermaking apparatus, and its peripheral part. 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 | release member of the washing | cleaning means of the wire part of a papermaking apparatus, and its peripheral part. It is a side view of the wire part of the papermaking apparatus in the 3rd Embodiment of this invention. It is a side view of the wire part of the papermaking apparatus in the 4th Embodiment of this invention. It is a figure of the draining means provided in the wire part of the papermaking apparatus, (a) is a side view, (b) is a XX arrow view in (a). It is a side view of the draining means 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 figure of the blade for draining provided in the papermaking apparatus, (a) is a side view, (b) is a XX arrow view in (a).

(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 a configuration of a used paper recycling processing apparatus 1 which is an example of a paper making apparatus. The used paper recycling processing apparatus 1 includes a used paper pulp manufacturing device 2, a deinking device 3, a paper making device 4, and the like. It is a compact device that integrally includes a finishing device 5 and a drainage treatment device 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. In addition, although the used paper reproduction | regeneration processing apparatus 1 is provided with the deinking apparatus 3, it may not be provided.

  As shown in FIG. 3, the paper making device 4 makes paper from the pulp suspension 12 deinked in the deinking device 3 and dries the wet paper 10 obtained by 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.

  The paper making apparatus 4 includes, in order from the upstream side to the downstream side, a wire unit 15 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 that dries the wet paper 10. 17.

Below, the structure of the wire part 15 is demonstrated.
As shown in FIGS. 4 to 8, an endless paper-making wire 18 is provided in the wire portion 15, and the paper-making wire 18 rotates in one direction so that the pulp suspension 12 containing fibers is transferred to the head box 19 ( It is supplied onto the papermaking wire 18 from an example of the supply unit and filtered and dehydrated.

  The papermaking wire 18 is a mesh-structured belt (for example, a metal or resin net) having water permeability, and is wound around a plurality of rotatable rollers 20 to 22. Each of the rollers 20 to 22 is provided between a pair of side frames 24 provided on the wire portion 15. Of these, the first roller 20 is located directly below the liquid supply port 23 of the head box 19, and the second roller 20 to 22. The 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.

  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.

  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.

  The wire portion 15 is provided with a cleaning means 28 for cleaning the papermaking wire 18. The cleaning means 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 washing means 28 is a dish-shaped (shallow-bottom box) 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 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.

  In addition, a receiving tray 35 that receives the filtrate 29 discharged from the discharge port 33 toward the third roller 22 is provided in one end frame 34 provided between the front ends of the pair of side frames 24.

  Further, between the pair of side frames 24, a cleaning water injection device 36 that injects clean water 37 (tap water or the like) toward the back surface of the papermaking wire 18 in the first return path 26a is provided.

  A white water tank 38 (an example of a storage unit) for storing 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. In addition, the other end frame 39 provided between the rear ends of the pair of side frames 24 is provided with a water supply unit 40 that supplies clean water 44 (tap water or the like) not containing fiber to the white water tank 38. It has been. In the white water tank 38, stirring means 41 for stirring the filtrate 29 is provided.

  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.

  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 wound around a plurality of rollers 49a to 49e, and the lower felt 48 is 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 pressing 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.

  As shown in FIGS. 3 and 9, the pressing 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 the surfaces of the removing rollers 51 and 52. Scrapers 53 and 54 (an example of a peeling member) are provided for peeling the fibers transferred to.

  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.

  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.

Hereinafter, the operation of the above configuration will be described.
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 device 9. A pulp suspension 12 is produced. Thereafter, the pulp suspension 12 is deinked by the deinking device 3 and is made by the papermaking device 4. Note that the deinking process by the deinking device 3 can be omitted.

  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 is rotated in one direction. .

  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.

  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 improving the formation (homogeneity) of recycled paper obtained by papermaking. And unevenness can be 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.

  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 can be reduced.

  Further, 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.

  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 of being 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.

  Further, since the filtrate 29 discharged from the discharge member 31 to the papermaking wire 18 is once 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.

  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.

  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.

  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 fiber concentration contained in the filtrate 29 is lowered. Furthermore, by stirring the filtrate 29 in the white water tank 38 by the stirring means 41, the fibers precipitated at the bottom of the white water tank 38 are stirred and dispersed.

  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.

  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.

  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.

  Thereby, it is possible to prevent the fibers remaining in the felts 47 and 48 from adhering to the wet paper 10 on the downstream side to lower the formation, and to improve the formation of recycled paper obtained by papermaking.

  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. .

  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.

  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.

(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. In the second embodiment described below, the discharge member 31 is provided. 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.

  In addition, a contact plate 66 that is slidably contactable with the back surface (lower surface) of the papermaking wire 18 in the return path 26 b 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 is provided between the side frames 24 to receive the filtrate 29 discharged from the discharge port 33 toward the paper making wire 18.
Hereinafter, the operation of the above configuration will be described.

  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.

  Further, as shown in FIG. 11, a part of the filtrate 29 discharged from the discharge member 31 to the surface of the papermaking wire 18 is formed in a minute gap portion 67 formed by the upper surface of the backing plate 66 and the back surface of the papermaking wire 18. The fibers on the surface of the papermaking wire 18 are released from the state of being in close contact with the surface of the papermaking wire 18 by the filtrate 29 accumulated in the gap portion 67 and slightly floated. 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.

  Further, since the filtrate 29 discharged from the discharge member 31 to the papermaking wire 18 is once 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.

(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 in the third embodiment, 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.

  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. Further, the scraper 71 and the fiber receiving portion 72 have the same configuration as the scrapers 53 and 54 and the fiber receiving portions 55 and 56 in the first embodiment.

Hereinafter, the operation of the above configuration will be described.
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. Thereby, it is possible to prevent the fibers remaining on the paper making wire 18 from adhering to the wet paper 10 on the downstream side and lower the formation, and to improve the formation of recycled paper obtained by paper making.

  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 are peeled off and received by the fiber receiving portion 72.

  In addition, each said removal roller 51,52,70, scraper 53,54,71, and fiber receiving part 55,56,72 may be provided in both the wire part 15 and the press part 16, or either. You may provide only in one side.

(Fourth embodiment)
The fourth embodiment of the present invention will be described below with reference to FIGS.
The wire section 15 of the papermaking apparatus 4 is provided with a draining means 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 means 75 is disposed below the paper making wire 18 and in the receiving member 30, and a plurality of draining means 75 are arranged at predetermined intervals in the direction of the dewatering path 25.

  Each draining means 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, is provided between the side frames 24, and both end portions in the longitudinal direction are supported by the side frames 24. 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 absorbent 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.
Hereinafter, the operation of the above configuration will be described.

  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 means 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.

  Thereby, it can prevent that the filtrate 29 distributes locally in the clearance gap between the draining means 75 and the back surface of the papermaking wire 18, and, for this reason, the fiber density contained in the wet paper 10 on the papermaking wire 18 is uniform. And the formation of the recycled paper 11 obtained by papermaking can be improved.

(Fifth embodiment)
The fifth embodiment of the present invention will be described below with reference to FIG.
Each draining means 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, is provided between the side frames 24, and both end portions 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. The water absorbing member 83 is attached to the upstream surface of the blade 82 in the dewatering path 25, and its upper end is in sliding contact with the back surface of the paper making wire 18. For the water absorbing member 83, for example, felt or sponge is used.

According to this, the same operation and effect as the fourth embodiment can be obtained.
In the fifth embodiment, the water absorbing member 83 is attached to the upstream surface of the dewatering path 25 of the blade 82. However, it may be attached to the opposite downstream surface.

(Sixth embodiment)
Hereinafter, a sixth embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 16, the first roller 20 of the wire portion 15 of the paper making apparatus 4 is located immediately 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.

  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.

Hereinafter, the operation of the above configuration will be described.
In a state where the first to third rollers 20 to 22 are rotated and the papermaking wire 18 is rotating, the pulp suspension 12 supplied from the head box 19 onto the papermaking 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.

  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 by the papermaking wire 18 to be reduced and deformed at the contact portion 88. 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.

  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 when the water absorbing member 87 expands and deforms from the reduced deformation state, and dehydration is promoted, so 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 can be improved.

  In the above embodiment, the first roller 20 is constituted by the roller main body 86 and the water absorbing member 87, but another intermediate roller (dehydration path 25) between the first roller 20 and the second roller 21. An example of a roller positioned on the downstream side of the head box 19 above may be provided, and this intermediate roller may be constituted by a roller body 86 and a water absorbing member 87.

In each of the above-described embodiments, the three rollers 20 to 22 are provided on the wire portion 15 of the papermaking apparatus 4, but a plurality other than the three may be provided.
In each of the above embodiments, as an example of the papermaking apparatus, the used paper recycling processing apparatus 1 using the used paper 7 as a raw material has been described. However, the present invention is not limited to the used paper recycling processing apparatus 1.

1 Used paper recycling equipment (paper making equipment)
3 Deinking device 4 Paper making device 7 Waste paper 9 Pulper device 10 Wet paper 11 Recycled paper 12 Pulp suspension 15 Wire part 16 Press part (next process part)
18 Papermaking wire 19 Head box (supply section)
20 1st roller (roller located under supply part)
21 Second roller 22 Third roller 25 Dehydration path 26 Return path 28 Washing means 29 Filtrate 30 Receiving member 31 Release member 32 Feed flow path 38 White water tank (reservoir)
40 Water Supply Unit 41 Stirring Means 47, 48 Felt (Water Absorbing Belt)
51, 52 Removal rollers 53, 54 Scraper (peeling member)
75, 81 Draining means 76, 83 Water absorbing member 86 Roller body 87 Water absorbing member 88 Contact portion 89 Separating portion

Claims (8)

A paper making apparatus having a wire part provided with an endless paper making wire, wherein the paper making wire rotates, and a pulp suspension containing fibers is supplied from the supply part onto the paper making wire and filtered and dehydrated. ,
The papermaking wire rotation path consists of 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 filtration and dewatering to the next process section in the subsequent stage. With a return path back to the upstream side,
A cleaning means for cleaning the papermaking wire is provided,
The papermaking apparatus, wherein the cleaning means discharges the filtrate that has passed through the papermaking wire in the dewatering path to the papermaking wire in the return path. The cleaning means 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. The papermaking wire is wound around multiple rotatable rollers,
The paper making apparatus according to claim 1, wherein the cleaning unit discharges the filtrate toward the roller in the return path. Below the papermaking wire is provided a reservoir for storing the filtrate,
The water supply part which supplies the water which does not contain a fiber to a storage part, and the stirring means which stirs the filtrate in a storage part are provided, The any one of Claims 1-3 characterized by the above-mentioned. The paper making apparatus described in 1. A press section is provided as the next process section after the wire section.
The press part is provided with a pair of rotatable endless water-absorbing belts that squeeze the wet paper transferred from the wire part from both the front and back sides,
A removal roller that transfers and removes fibers remaining on at least one surface of the water absorption belt and the paper making wire, and a peeling member that peels off the fibers transferred to the surface of the removal roller are provided,
The papermaking apparatus according to any one of claims 1 to 4, wherein the removing roller is rotatably in contact with at least one surface of the water absorbing belt and the papermaking wire. A paper making apparatus having a wire part provided with an endless paper making wire, wherein the paper making wire rotates, and a pulp suspension containing fibers is supplied from the supply part onto the paper making wire and filtered and dehydrated. ,
A draining means for draining the wet paper on the papermaking wire in sliding contact with the backside of the papermaking wire is provided.
The paper draining means has a water-absorbing member in sliding contact with the back surface of the paper-making wire. A paper making apparatus having a wire part provided with an endless paper making wire, wherein the paper making wire rotates, and a pulp suspension containing fibers is supplied from the supply part onto the paper making wire and filtered and dehydrated. ,
The papermaking wire rotation path consists of 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 filtration and dewatering to the next process section in the subsequent stage. With a return path back to the upstream side,
The papermaking wire is wound around multiple rotatable rollers,
Of the plurality of rollers, the first roller located below the supply unit on the dehydration path has a roller body and a water absorbing member provided on the outer periphery of the roller body,
The water-absorbing member is expandable / contractible in the radial direction, the abutting portion that is in contact with the papermaking wire is reduced, and the remaining separated portion that is not in contact with the papermaking wire is expanded,
The papermaking wire is located below the first roller on the return path and from the roller located upstream of the first roller in the direction opposite to the direction of wet paper transport by the papermaking wire from the first roller to the first roller. A papermaking apparatus that is inclined obliquely upward. A papermaking apparatus comprising the papermaking apparatus according to any one of claims 1 to 7.

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