JP2011127227A - Waste paper processing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waste paper processing system which can control the generation of initial recycled paper and terminal recycled paper containing sites having unstable quality. <P>SOLUTION: In the waste paper processing system including a raw material-storing portion having a regular paper tank 11 and shredding tank 12 for storing waste paper or shredded waste paper pieces as recycling paper raw materials and used for supplying the recycling raw materials to a rear stage pulp-recycling portion, a pulp-recycling portion 1 having a pulper 14 for disintegrating the recycling raw materials to prepare recycled pulp and used for supplying the recycled pulp to a rear stage deinking pulp portion 2, a deinked pulp portion 2 having a deinking portion 23 for bleaching the recycled pulp to prepare deinked pulp and used for supplying the deinked pulp to a rear stage paper-making portion 3, and the paper-making portion 3 for making paper from the deinked pulp to prepare the recycled paper, a storage tank 21 is provided for storing a prescribed amount of the recycled pulp flowed down from the upstream side of the transfer route and simultaneously continuously supplying the recycled pulp to the downstream side, in the transfer route for transferring the recycled pulp from the pulper to the deinking portion. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for producing paper from recycled pulp obtained by separating waste paper, and relates to a small waste paper processing apparatus that can be installed in an office or the like where waste paper is generated to recycle the paper.

2. Description of the Related Art Conventionally, in Japan, a technology and a social system for collecting used paper once used, for example, used newspapers and regenerating the used paper are established.
A papermaking method performed in a general papermaking factory includes a pulp process, a papermaking process, and a finishing process. When used paper is used as a raw material, a used paper pulp process is added.

In the pulp process, pulp is produced from wood chips through a process such as cooking, washing, bleaching, and selection by a chemical method, which is one of the pulping methods for extracting fibers from wood.
In the waste paper pulp process, the waste paper that is the raw material is dissolved in water, and metal, film, adhesive resin, printing ink (dye type, pigment type), which is a foreign matter other than paper fiber, using mechanical power and chemicals, The copy toner is separated and removed, and then bleached, dehydrated and dried to obtain waste paper pulp.

  In the paper making process, the product paper is processed through the wire part, press part, dryer part, calendar part, and coater part of the paper machine. In the wire part, the prepared (regenerated) pulp is placed on a paper making net (wire) and dehydrated to make paper, and in the press part, the moisture in the wet paper containing a large amount of moisture from the wire part is removed. In the dryer part, the paper is dried through a dryer heated with steam, in the calendar part, the paper surface is smoothed between the rolls, and in the coater part, the base paper is coated with paint.

  In the finishing process, in the super calender part, the micro unevenness of the paper surface coated by the coater part is smoothed to give gloss, and in the cutter and winder part, it is cut into a predetermined product size or wound on a roll.

  By the way, when making recycled paper from waste paper, there are the following problems. The consumption place such as the office where waste paper is generated by the consumption of paper and the paper mill that recycles the paper from the waste paper are separated, and cost and energy are required to transport the waste paper. Moreover, there is a risk that confidential information and the like written on the paper will be leaked to the outside by taking out the used paper. For this reason, the paper is finely cut with a shredder, but the shredded dust that has been finely cut is difficult to regenerate because the fibers are too short.

  In Patent Document 1, as a method for producing recycled paper, raw material waste paper is disaggregated, soaked and deinked, and then yeast having cohesive properties is added, and the fine inorganic contained in the ink (dye system, pigment system) by yeast. A configuration is described in which pigments, carbon particles, and the like are aggregated, and then the aggregates are separated and removed by flotation.

  Patent Document 2 discloses, as a used paper recycling method and apparatus, a step of separating recycled paper cut by a document cutting machine into a recycled pulp, a step of storing the recycled pulp, and charging the recycled pulp into an injection device. The structure which consists of the process of spraying a fiber sheet and the process of paper-making the recycled pulp sprayed on the fiber sheet is described.

JP-A-8-60570 JP 10-317290 A

  In the above patent document, it is proposed to reduce the size of the apparatus. However, since it is configured to batch process a plurality of used paper, in the paper making operation performed for each processing unit amount of batch processing, at the leading edge of the initial recycled paper at the start or the trailing edge of the final recycled paper at the stop An unstable site occurred.

Further, the surplus paper pieces generated when the recycled paper is cut and formed into a standard shape have been deinked once, and it is useless to deink the surplus paper pieces again.
The present invention solves the above-described problems, and can suppress the generation amount of initial recycled paper and final recycled paper including unstable quality parts, and is generated when the recycled paper is cut into a standard shape. An object of the present invention is to provide a used paper processing apparatus that can recycle surplus paper pieces into recycled paper without deinking.

  In order to solve the above-mentioned problems, the used paper processing apparatus of the present invention stores used paper or a cut piece of used paper as a regenerated raw material, and separates the regenerated raw material from a raw material storage unit that supplies the regenerated raw material to a recycled pulp unit at a later stage. A regenerated pulp section for supplying regenerated pulp to a subsequent deinking pulp section, and a deinking section for bleaching the regenerated pulp to prepare deinked pulp. In the waste paper processing equipment, which includes a deinking pulp section that supplies deinked pulp to the section, and a papermaking section that makes the deinked pulp and prepares recycled paper, in the middle of the transfer path for transferring the recycled pulp from the pulper to the deinking section And a storage tank for continuously supplying the recycled pulp to the downstream side while storing a predetermined amount of the recycled pulp flowing from the upstream side of the transfer path.

  The used paper processing apparatus of the present invention comprises a raw material storage section for storing used paper or a cut piece of used paper as a recycled raw material, and supplying the recycled raw material to a recycled pulp section at a later stage, and a pulper for preparing recycled pulp by disaggregating the recycled raw material. Transporting path for transporting recycled pulp from the pulper to the papermaking section in a used paper processing apparatus comprising a recycled pulp section for supplying recycled pulp to a subsequent papermaking section and a papermaking section for papermaking the recycled pulp to prepare recycled paper In the middle of this, a storage tank is provided that continuously supplies the regenerated pulp to the downstream side while storing a predetermined amount of the regenerated pulp flowing from the upstream side of the transfer path.

In the used paper processing apparatus of the present invention, the storage tank has a capacity of N times or more of the recycled pulp processing amount per processing unit of the pulper.
In the used paper processing apparatus of the present invention, the storage tank has a regenerated pulp supply amount that supplies regenerated pulp to the downstream side within the processing time required per pulper processing unit does not exceed the regenerated pulp processing amount per pulper processing unit. It is characterized by.

  The used paper processing apparatus of the present invention comprises a raw material storage section for storing used paper or a cut piece of used paper as a recycled raw material, and supplying the recycled raw material to a recycled pulp section at a later stage, and a pulper for preparing recycled pulp by disaggregating the recycled raw material. It has a regenerated pulp section that supplies recycled pulp to the subsequent deinking pulp section, and a deinking section that prepares deinked pulp by bleaching the recycled pulp, and supplies deinked pulp to the subsequent papermaking section. In waste paper processing equipment that has a deinking pulp section and a papermaking section that makes deinked pulp and prepares recycled paper, a plurality of pulpers can be optionally switched so that recycled pulp can be fed from each pulper to the deinking section. It is characterized by supplying continuously.

  The used paper processing apparatus of the present invention comprises a raw material storage section for storing used paper or a cut piece of used paper as a recycled raw material, and supplying the recycled raw material to a recycled pulp section at a later stage, and a pulper for preparing recycled pulp by disaggregating the recycled raw material. In the used paper processing equipment, which has a recycled pulp section that supplies recycled pulp to the subsequent papermaking section and a papermaking section that makes recycled pulp and prepares recycled paper, a plurality of pulpers can be optionally switched The regenerated pulp is continuously supplied from each pulper to the deinking section.

  The used paper processing apparatus of the present invention comprises a raw material storage section for storing used paper or a cut piece of used paper as a recycled raw material, and supplying the recycled raw material to a recycled pulp section at a later stage, and a pulper for preparing recycled pulp by disaggregating the recycled raw material. It has a regenerated pulp section that supplies recycled pulp to the subsequent deinking pulp section, and a deinking section that prepares deinked pulp by bleaching the recycled pulp, and supplies deinked pulp to the subsequent papermaking section. In a used paper processing apparatus comprising a deinking pulp section and a papermaking section for making recycled paper by making deinked pulp, a plurality of pulpers can be optionally switched and at least one of the pulpers can be recycled pulp. The other pulper supplies recycled pulp to the deinking section, and surplus paper pieces of recycled paper are fed into the at least one pulper.

  As described above, according to the present invention, the regenerating work can be performed continuously without being limited by the processing unit amount of the pulper, and the working efficiency of the entire machine is improved. By supplying the recycled pulp to the papermaking unit without interruption and continuously performing the papermaking operation, it is possible to suppress the generation amount of the initial recycled paper and the final recycled paper including a portion with unstable quality.

  Excess paper fragments that are generated when cutting recycled paper into a standard shape are quick to disaggregate and do not require deinking, so the pulper processing time can be reduced and recycled to recycled paper without deinking. This increases the recycling rate of used paper, increases its usefulness as an environmental device, and improves work efficiency by eliminating the deinking process.

Schematic diagram showing a used paper processing apparatus in an embodiment of the present invention Block diagram showing the used paper processing equipment Schematic showing the recycled pulp section of the used paper processing equipment Schematic diagram showing the action of the fiber concentration adjustment section in the recycled pulp section of the used paper processing equipment Schematic diagram showing the deinking section of the used paper processing equipment Schematic showing the drying roller of the used paper processing equipment Schematic showing the surplus paper piece transport section of the used paper processing device Block diagram of the control unit of the used paper processing device Flow sheet showing the control of the used paper processing equipment Flow sheet diagram showing operation start condition check in the same control Flow sheet diagram showing operation stop condition check in the same control Flow sheet diagram showing operation preparation operation in the same control Flow sheet diagram showing stop preparation operation in the same control The block diagram which shows the principal part of the used paper processing apparatus in other embodiment of this invention The block diagram which shows the principal part of the used paper processing apparatus in other embodiment of this invention

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2, the used paper processing apparatus is integrally provided with a recycled pulp unit 1, a deinking pulp unit 2, a paper making unit 3, a finishing unit 4, and a waste water processing unit 5, and prepares recycled paper from used paper 6 (recycled). And a control unit 7 that controls the operation of the recycled pulp unit 1, the deinking pulp unit 2, the paper making unit 3, the finishing unit 4, and the wastewater treatment unit 5.
(Recycled pulp part)
The recycled pulp unit 1 is a unit that prepares (regenerates) recycled pulp by separating the cut paper pieces of the used paper 6, and includes a standard paper tank 11 that forms a raw material storage unit that stores the recycled paper 6 as a standard raw material, A shredder tank 12 that forms a raw material storage unit that temporarily stores a cut piece of paper that has been cut into a predetermined size suitable for recycling by cutting the recycled paper 6 of the recycled material, a fiber amount adjusting unit 13, and a pulper 14 The fiber concentration adjusting unit 15 is provided.

  As shown in FIG. 3, the shredder tank 12 has an upper opening 121 opened upward, and a bottom surface 122 forms an inclined surface inclined toward the discharge port 123. The discharge port 123 is provided with a discharge device 124 for discharging the cut paper piece 61. There are various discharge devices 124, but here, a plurality of blades are arranged radially around the rotation axis. A quantity measuring sensor 125 is disposed above the shredder tank 12, and the quantity measuring sensor 125 measures the quantity of the cut paper piece as a recycled material stored in the shredder tank 12. The amount of the cut paper piece is estimated by measuring.

Although illustration is omitted, the standard paper tank 11 is also provided with a quantity measuring sensor for measuring the quantity of the standard waste paper 6 as a recycled raw material.
The fiber amount adjustment unit 13 is disposed below the discharge port 123 of the shredder tank 12, and includes a tray part 131 that receives the cut paper piece 61 discharged from the discharge port 123, and a weighing unit 132 that supports the tray part 131. The weighing unit 132 measures the weight of the cut paper piece 61 put into the tray part 131, and adjusts the amount of the cut paper piece 61 put into the pulper 14, that is, the fiber amount, by changing the set weight related to the weighing. Similarly, the fiber amount adjustment unit 13 measures the weight of the standard waste paper 6 that is input from the standard paper tank 11, and changes the set weight related to the measurement to change the amount of the standard waste paper 6 that is input to the pulper 14, That is, the fiber amount is adjusted.

  As shown in FIG. 4, the tray part 131 tilts the tray 131 a from a horizontal posture to a tilted posture in which the tray 131 a tilts toward the pulper 14, and has driving means such as a motor for tilting the tray 131 a. The tray 131a is provided so as to be openable and closable between a normal position where the side wall 131b adjacent to the pulper 14 stands and a tilt position where the side wall 131b tilts toward the pulper 14, and the side wall 131b tilts as the tray 131a tilts. Then, it returns to the standing posture with the backward movement of the tray 131a.

  The cutting paper piece 61 is gradually dropped onto the tray 131a by the discharge device 124, and when the measurement value measured by the weighing unit 132 reaches the set value, the discharge device 124 is stopped, and the tray 131a is tilted to cut the cutting paper piece. 61 is put into the pulper 14. Similarly, the standard waste paper 6 is put into the pulper 14.

  The pulper 14 disaggregates the cut paper piece 61 into fibers, that is, recycled pulp, in a solvent such as clean water or white water. The tank body 141 into which the cut paper piece 61 is put, and the stirring that swirls inside the tank body 141 The blade 142 and drive means (not shown) such as a motor that rotationally drives the stirring blade 142 are provided. The tank body 141 is provided with a heater 143 and a temperature sensor 144 for heating the solvent to a predetermined temperature, and a solvent supply system 101 for supplying the solvent from the waste water treatment unit 5 communicates therewith.

  The pulper 14 communicates with the fiber concentration adjusting unit 15. The fiber concentration adjusting unit 15 supplies the recycled pulp-containing liquid to the deinked pulp unit 2 and the solvent from the waste water treatment unit 5 as the concentration adjusting solution. A concentration adjusting liquid supply system 103 is in communication.

In the pulper 14 and the fiber concentration adjusting unit 15, a solvent corresponding to the amount of paper of the regenerated raw material, here water, is charged into the tank body 141, and the stirrer blade 142 is driven to dissociate the fibers of the cut paper pieces to regenerate pulp. Is prepared (regenerated), and a regenerated pulp-containing liquid containing regenerated pulp is sent to the deinking pulp section 2 through the fiber concentration adjusting section 15.
(Deinking pulp section)
The deinking pulp unit 2 includes a storage tank 21, a pre-deinking dilution tank 22, and a deinking unit 23, and a transfer system 201 including a pipe, a pump, and the like between the storage tank 21 and the pre-deinking dilution tank 22. And a transfer system 202a including a pipe, a pump and the like and having a valve 202b is provided between the pre-deinking dilution tank 22 and the deinking unit 23, and the pre-deinking dilution tank 22 and a head box of the paper making unit 3 described later. A transfer system 202c having a valve 202d is provided between the pipes 31 and 31.

  When the valves 202b and 202d are switched, the recycled pulp-containing liquid in the pre-deinking dilution tank 22 flows to the deinking unit 23 through the transfer system 202a and directly flows to the head box 31 through the transfer system 202c. And can be switched.

  When the recycled pulp-containing liquid in the pre-deinking dilution tank 22 flows to the deinking unit 23 through the transfer system 202a, the storage tank 21 is in the middle of the transfer path for transferring the regenerated pulp from the pulper 14 to the deinking unit 23. The deinking unit supplies the regenerated pulp-containing liquid continuously to the downstream pre-deinking dilution tank 22 while storing the regenerated pulp-containing liquid sent from the fiber concentration adjusting unit 15 on the upstream side of the transfer path. The recycled pulp-containing liquid is continuously supplied to the papermaking unit 3 through the No. 23.

  Further, when the recycled pulp-containing liquid in the pre-deinking dilution tank 22 flows directly to the head box 31 through the transfer system 202c, the storage tank 21 transfers the recycled pulp from the pulper 14 to the head box 31 of the paper making unit 3. The regenerated pulp-containing liquid is continuously supplied to the downstream head box 31 while storing the regenerated pulp-containing liquid sent from the fiber concentration adjusting unit 15 on the upstream side of the transfer path.

  For this reason, the lot in the papermaking unit 3 is larger than the case where the papermaking unit 3 is operated with a configuration in which the storage unit 21 is not provided and the processing unit amount of the pulper is one lot. For example, in the present embodiment, the storage tank 21 has a capacity that is three times or more the amount of recycled pulp per unit of batch processing of the pulper 14. By sufficiently storing the recycled pulp-containing liquid, the size of one lot in the papermaking section 3 is more than three times the processing unit amount of the pulper 14, and the papermaking section is not limited by the processing unit amount of the pulper 14. 3 can be operated continuously, and the generation amount of the initial recycled paper and the final recycled paper including the unstable portion can be suppressed. The capacity of the storage tank 21 may be at least N times the capacity of the recycled pulp processed per unit of batch processing of the pulper 14, and may be 1 time.

  In this case, the regenerated pulp supply amount that the storage tank 21 supplies regenerated pulp to the downstream side within the processing time required by the pulper 14 per processing unit exceeds the regenerated pulp processing amount that the pulper processes per processing unit. Then, even if the regenerated pulp containing liquid of the processing unit amount is supplied from the pulper 14 to the storage tank 21 for each batch processing, the storage tank 21 does not recover the initial storage amount, and the storage amount of the storage tank 21 over time is The size of one lot of the paper making unit 3 is reduced until the storage amount of the storage tank 21 is reduced.

  In addition, it is assumed that the regenerated pulp supply amount that the storage tank 21 supplies the regenerated pulp to the downstream side within the processing time required by the pulper 14 per processing unit does not exceed the regenerated pulp processing amount that the pulper processes per processing unit. By supplying a regenerated pulp-containing liquid of a processing unit amount from the pulper 14 to the storage tank 21 for each batch process, the storage tank 21 can recover the initial storage amount, and the storage tank 21 always contains regenerated pulp. As long as the liquid is stored and the supply from the pulper 14 continues, the recycled pulp-containing liquid can always be supplied from the storage tank 21 to the pre-deinking dilution tank 22 on the downstream side, and the size of one lot of the papermaking unit 3 is infinite. It becomes.

  The dilution tank 22 before deinking is used to dilute the recycled pulp-containing liquid to a fiber concentration suitable for deinking, here about 1% by weight, and supplies a solvent as dilution water from the waste water treatment unit 5 104 communicates.

  The deinking unit 23 is called a flowator and separates foreign matters such as ink and toner from the fiber. In the present embodiment, the deinking unit 23 has the configuration shown in FIG. The deinking section 23 has a front tank 231 and a rear tank 232, and the front tank 231 and the rear tank 232 communicate with each other at the opening on the upper end side of the partition wall 233 that forms the overflow weir. Heaters 234 and 235 are arranged in the front tank 231 and the rear tank 232, respectively, a fine bubble jet port 236 and a stirring blade 237 are arranged in the front tank 231, and a temperature sensor 238 is arranged in the rear tank 232. ing.

In the front tank 231, in the presence of the surfactant, the regenerated pulp-containing liquid containing foreign particles such as ink and toner is stirred by the stirring blade 237, and fine bubbles are generated from the outlet 236 in the regenerated pulp-containing liquid. Blowing is performed, and hydrophobic foreign particles are adhered to the surface of the bubbles of the surfactant to be floated and separated, and the hydrophilic fibers are transferred from the opening on the upper end side of the partition wall 233 to the rear tank 232 for deinking. At this time, the recycled pulp-containing liquid is heated to a predetermined temperature by the heaters 234 and 235, and the temperature is controlled by the temperature sensor 238.
(Paper making)
The paper making unit 3 makes (degenerates) recycled paper by making deinked pulp. As shown in FIG. 1, the head box 31, the wire unit 32, the dewatering unit 33, the press unit 34, and the dryer unit 35 are used. Consists of.

  The wire portion 32 has a mesh belt 323 stretched between rolls 321 and 322 on both sides, and the mesh belt 323 forms an endless track. The mesh belt 323 is uniformly ejected with a deinked pulp-containing liquid including deinked pulp from the head box 31, and drained to form a fiber layer.

  The dewatering unit 33 is composed of a pair of upper and lower water absorbing belts 332 made of felt stretched between a plurality of rollers 331, and transfers the paper 333 made from the mesh belt 323 to the water absorbing belt 332. Water is sandwiched between and dehydrated. The water absorbing belt 332 dehydrates between a pair of upper and lower dewatering rollers 334 provided on the traveling track.

The press unit 34 sandwiches the paper 333 made between the water-absorbing belts 332 and squeezes and dehydrates it through a pair of upper and lower dewatering rollers 341.
The dryer unit 35 sandwiches the paper 333 made between a pair of upper and lower cloth conveying belts 352 spanned between a plurality of rollers 351, and presses against the plurality of drying rollers 353 to dry the paper 333 made. In addition to the cloth, the transport belt 352 may be made of a material such as rubber or resin.

As shown in FIG. 6, the dryer unit 35 includes a temperature sensor 354 that measures the temperature of the surface of the drying roller 353 by disposing a conveying belt 352 around a drying roller 353 provided with a heater therein.
(Finishing part)
The finishing section 4 has a calendar section 41 and a cutting section 42. The calendar section 41 passes the paper 333 made between a plurality of press rollers 411 to increase the flatness of the paper. The recycled paper 100 is completed by cutting into sizes.
(Wastewater treatment department)
The waste water treatment unit 5 includes tank bodies of a white water tank 51 and a waste water treatment unit 52. The white water tank 51 stores waste water containing recycled pulp flowing from the wire part 32 through the papermaking drainage system 105, and returns to each step again. Supply. The waste water treatment unit 52 treats the deinking waste liquid flowing from the deinking unit 23 through the deinking drainage system 106. The waste water treatment unit 52 passes through a filter to remove fibers, ink, and toner, and is neutralized by adding chemicals to the public. Treat to the quality of water that can be drained into sewage. The white water tank 51 communicates with a makeup water supply system 107 that supplies clean water as makeup water.
(Control part)
As shown in FIG. 8, the control unit 7 has the following functional units as functional circuits set in the CPU 71. That is, a regenerated pulp unit control function unit 711 that controls the operation of the regenerated pulp unit 1, a deinking pulp unit control function unit 712 that controls the operation of the deinking pulp unit 2, and a paper making unit that controls the operation of the paper making unit 3 The control function unit 713, the finishing unit control function unit 714 that controls the operation of the finishing unit 4, the waste water treatment unit control function unit 715 that controls the operation of the waste water treatment unit 5, and the operation process from the start of operation to the stop of operation. An automatic operation control function unit 716 that executes sequentially, and an operation lock control function unit that inputs an operation start permission instruction or a disapproval instruction to the automatic operation control function part 716 in accordance with a cutting paper piece presence / absence signal input from the quantity measurement sensor 125 717, a target number setting function unit 718 for setting the target number of recycled paper to be prepared (regenerated), a counter function unit 719 for counting the number of prepared (regenerated) recycled paper, A drainage operation control function unit 720 that performs a predetermined drainage operation at the end of operation in the pulp unit 1, the deinking pulp unit 2, and the papermaking unit 3, a cleaning operation control function unit 721 that performs a predetermined cleaning operation, and a quantity measuring sensor 125 A predicted reproduction number calculation function unit 722 that calculates the expected number of reproductions that can be regenerated before the end of the regeneration operation within the maximum possible number of reproductions from the measured amount of raw material, and at least one of the scheduled operation start time and scheduled operation end time A time setting function unit 723 having at least one of a function for arbitrarily setting one of the scheduled times and a function for arbitrarily setting the operation time, an operation time integration function unit 724 for integrating the operation time of the regeneration operation, and a counter When the number of completed reproductions accumulated by the function unit 719 reaches the target number of reproductions set by the target number setting function unit 718, An operation stop selection function unit 725 for selectively setting whether to stop the regeneration operation when the operation time accumulated by the time integration function unit 724 reaches the operation time set by the time setting function unit 723, and the completion of the regeneration operation for the target number of reproductions The expected regeneration time calculation function unit 726 that calculates the expected regeneration time required until the end, the power mode selection function unit 727 that selectively sets whether to execute the power saving mode or the auto power off mode after the regeneration operation ends, and the regeneration operation is stopped An operation stop time measuring function unit 728 for measuring the operation stop time during the operation and an operation stop cause determination function unit 729 for determining the cause of the operation stop are provided.

  The control unit 7 also includes a timing input unit 73 for inputting at least one of operation start and operation stop timing as an instruction signal to the automatic operation control function unit 716, a display unit 74, and a user instructing to interrupt the regeneration operation. The operation interruption instruction means 75 is provided.

  In this embodiment, the timing input unit 73 includes an internal clock disposed inside the control unit 7 and inputs an instruction signal to the automatic operation control function unit 716 when the internal clock reaches a scheduled time. However, the timing input unit 73 may be an input port for inputting an instruction signal issued when an external clock arranged outside the control unit 7 reaches a scheduled time or an instruction signal issued from an external device. .

The control unit 7 performs the above-described operation in the regenerated pulp unit 1, the deinking pulp unit 2, the paper making unit 3, the finishing unit 4, and the waste water treatment unit 5, respectively, as a regenerated pulp unit control function unit 711 and a deinking pulp unit control function unit. 712, a papermaking section control function section 713, a finishing section control function section 714, and a wastewater treatment section control function section 715.
(Operation control)
The user operates various switches such as a touch panel provided on the display unit 74 to control at least one of the scheduled operation start time and the scheduled operation end time, or the operation time for which the operation is continuously continued. The time setting function unit 723 of the unit 7 is set. When only the scheduled operation start time is set, the possible operation time from the start of the device to the end of the regeneration operation is indefinite time until the completion of the regeneration operation, and only the scheduled operation end time is set. In this case, the operable time until the end of the regeneration operation for stopping the operation of the device is a limited time from the current time to the scheduled operation end time, and when setting the scheduled operation start time and the scheduled operation end time, The operable time until the end of the regeneration operation for stopping the operation is a limited time from the scheduled operation start time to the scheduled operation end time.

  When setting the operation time to continue operation continuously, the operation possible time until the end of the regeneration operation to stop the operation of the device is the limited time until the operation time set from the current time expires, and the operation is scheduled to start When the time is set together, the operable time is a limited time until the set operation time expires from the scheduled operation start time.

  The expected regeneration number calculation function unit 722 of the control unit 7 calculates the maximum reproducible number from the amount of the regenerated raw material measured by the quantity measuring sensor 125, and can regenerate within the maximum possible number and before the end of the regeneration operation. The estimated reproduction number is calculated and the calculated reproduction number is displayed on the display unit 74.

  The user operates various switches such as a touch panel provided on the display unit 74 to set the desired number of recycled papers within the expected number of reproductions in the target number setting function unit 718 as the reproduction target number. The expected reproduction time calculation function unit 726 calculates the estimated reproduction time required until the end of the reproduction operation for reproducing the target number of recycled paper, and displays the estimated reproduction time on the display unit 74. When the reproduction target number is the total number of expected reproductions, it is possible to omit the setting of the reproduction target number, and the expected reproduction time calculation function unit 726 will complete the reproduction operation for reproducing the total number of expected reproductions. The estimated reproduction time required is calculated, and the estimated reproduction time is displayed on the display unit 74.

  Normally, the regeneration operation ends based on the operation time. However, the user operates the various switches such as a touch panel provided on the display unit 74, so that the operation stop selection function unit 725 uses the regeneration target number or the operation time as a reference. It is possible to select and set whether to stop the regeneration operation. When the reproduction target number is set as a reference, the reproduction completion number accumulated by the counter function unit 719 is set by the target number setting function unit 718 without being restricted by the limited time set by the time setting function unit 723. Regeneration operation is performed until When the operation time is set as a reference, the operation time accumulated by the operation time integration function unit 724 is a time even if the reproduction completion number accumulated by the counter function unit 719 does not reach the reproduction target number set by the target number setting function unit 718. When the limited time set by the setting function unit 723 is reached, the regeneration operation is stopped.

  Furthermore, the user selects and sets either the power saving mode or the auto power off mode in the power mode selection function unit 727 by operating various switches such as a touch panel provided on the display unit 74. In the power saving mode, the used paper processing apparatus is set in a standby state with the minimum necessary power after the regeneration operation is completed, and in the auto power off mode, the used paper processing apparatus is completely stopped after the regeneration operation is completed.

  Control from the start to the stop of the automatic operation by the control unit 7 is performed along the flow sheet shown in FIG. That is, from the stop state 900, the operation start condition check 910, the operation preparation operation 920, the recycled paper preparation 930, the operation stop condition check 940, and the stop preparation operation 950 are performed to stop the apparatus 960.

  In the operation start condition check 910, as shown in FIG. The operation start signal is an instruction signal input from the timing input unit 73 to the automatic operation control function unit 716. In this embodiment, the operation start signal is input when the internal clock reaches the scheduled time set by the time setting function unit 723. Signal.

  In the operation preparation operation 920, as shown in FIG. 12, water injection 921 into the tank is performed. And at the time of initial operation, the remaining water such as pumps and pipes is washed and discharged with fresh water to suppress the deterioration of quality. Water is poured into the remaining portions at a predetermined timing as necessary. That is, the required amount of water is poured into the pulper 14 and the pre-deinking dilution tank 22.

Next, the heaters 143, 234, and 235 are energized to perform a heating operation 922.
Next, it is determined 923 whether or not the water temperature of the pulper 14 and the deinking unit 23 measured by the temperature sensors 144 and 238 and the surface temperature of the drying roller 353 measured by the temperature sensor 354 have reached the set temperature.

  In the recycled paper production 930, the recycled pulp section control function section 711, the deinking pulp section control function section 712, the papermaking section control function section 713, the finishing section control function section 714, and the wastewater treatment section control function section 715 are respectively used. 1, the deinking pulp section 2, the papermaking section 3, the finishing section 4, and the wastewater treatment section 5 are controlled to perform the above-described operation.

  During the recycled paper production 930, the expected reproduction number calculation function unit 722 of the control unit 7 includes a reproduction completion number accumulated by the counter function unit 719 and a remaining time calculated from the operation time accumulated by the operation time accumulation function unit 724. Then, the total number of predicted regeneration sheets that can be regenerated from the end of the regeneration operation to the end of the regeneration operation is recalculated, and the recalculated regeneration estimated number of sheets is displayed on the display unit 74.

  In addition, when the user changes the time setting by the time setting function unit 723, the predicted reproduction number calculation function unit 722 of the control unit adds the reproduction completion number accumulated by the counter function unit 719 and the operation time accumulation function unit 724. Based on the remaining time after the setting change calculated from the operation time, the total number of reproducible reproductions that can be regenerated before the end of the regenerative operation is recalculated, and the recalculated reproducible reproduction number is displayed on the display unit 74.

  Further, the control unit 7 measures the operation stop time while the regeneration operation is stopped by the operation stop time measurement function unit 728, and responds to the operation stop cause and the operation stop time determined by the operation stop cause determination function unit 729. To perform a preset maintenance operation.

  For example, when the user gives an instruction to interrupt the regeneration operation by the operation interruption instruction means 75, the operation stop cause determination function unit 729 of the control unit 7 determines that the operation interruption instruction is the cause of the operation stop, and the operation stop time is a predetermined time. If it is within, the cleaning operation of the paper making unit 3 set in advance as the maintenance operation is executed. The operation stop cause determination function unit 729 determines that the operation stop instruction is the cause of the operation stop, and when the operation stop time exceeds a predetermined time, it is set as a discard operation, a drain operation, and a maintenance operation in advance for discarding the recycled paper during the regeneration operation. Perform the cleaning operation.

  Further, when a power failure occurs, the operation stop cause determination function unit 729 of the control unit 7 determines that the power failure is the cause of the operation stop and performs the power failure recovery operation when the operation stop time is within a predetermined time. , The cleaning operation of the paper making unit 3 set in advance as a maintenance operation is executed, and when the operation stop cause determination function unit 729 determines that the power outage is the cause of the operation stop and the operation stop time exceeds a predetermined time, the power failure recovery operation is performed. After the execution, a discarding operation for discarding the recycled paper in the course of the recycling operation, a draining operation, and a cleaning operation set in advance as a maintenance operation are executed.

  The content of the maintenance operation for the operation stop time can be arbitrarily set by the user, and the user can arbitrarily change the setting of the reference value for the operation stop time. All operations are stopped during an emergency stop.

  In the case of a user's arbitrary interruption request or abnormal stop (power failure, emergency stop), it is possible to back up the situation before the stop and perform a process that can be recovered halfway. At the time of a power failure or emergency stop, it is also possible to issue a warning with a communication means such as a LAN, a device emergency stop lamp, or a buzzer sound. It is also possible to set and register in advance a specific part that allows the operation to be continued at the time of the interruption, for example, stirring of each tank, etc. at the time of an arbitrary interruption request of the user.

  When a power failure occurs during drying, power is supplied from the standby power source to the finishing unit 4, and the paper is discharged after the paper is dried by the residual heat of the dryer unit 35. If it is not completely dry, it can be configured to be discharged to a reject tray.

  The battery provided as a backup power source is charged by commercial power or solar power generation, but a fuel cell can be used as the backup power source so that paper can be manually ejected when the remaining battery level is insufficient. Is also possible.

  In the operation stop condition check 940, as shown in FIG. 11, it is determined 941 whether or not the end time has been reached. This end time is indicated by an instruction signal input from the timing input unit 73 to the automatic operation control function unit 716. In this embodiment, when the internal clock reaches the scheduled time, the operation scheduled from the start of operation is performed. This is an instruction signal that is input when the time has elapsed. If it is the end time, the operation proceeds to the stop preparation operation.

  If it is not the end time, a determination 942 is made as to whether or not the set amount of processing has been completed. The control unit 7 counts the number of times the paper making unit 3 is driven, or detects the completed recycled paper by a sensor (not shown) provided in the finishing unit 4, thereby determining the target number of prepared recycled papers. The counter function unit 719 counts, and the operation is stopped when the count value of the counter function unit 719 reaches the target number set by the user in the target number setting function unit 718. Therefore, excessive operation is suppressed and only the minimum operation required by the user is realized. When processing for the set amount is completed, the operation proceeds to the stop preparation operation.

  If the processing for the set amount has not been completed, the amount measuring sensor 125 checks 943 whether or not there is a cut paper piece inside the standard paper tank 11 and the shredder tank 12. If there is no cut paper piece, a warning 944 is displayed on the display unit 74, and the operation proceeds to the stop preparation operation. If there is a piece of cut paper, continue operation.

  In the stop preparation operation 950, as shown in FIG. 13, an operation to stop energizing the heaters 143, 234, 235 is performed 951, and the surface temperature of the drying roller 353 measured by the temperature sensor 354 is equal to or lower than the set temperature. A determination 952 of whether or not is performed, and a fiber and water treatment 953 is performed.

  In the fiber and water treatment 953, the operation is controlled by the drainage operation control function unit 720, the fibers remaining in the papermaking unit 3 are sent to the final position and reused, and other fibers are processed for disposal, and the drainage operation. As for water, it removes foreign matters, returns to neutral with chemicals and discharges it.

  Next, a drive stop 954 is performed, and in cleaning 955 for each part performed as a maintenance operation, a cleaning operation is controlled by the cleaning operation control function unit 721 to automatically wash away fibers adhering to the tank or the belt with water. In addition, a cleaning operation is performed with cleaning water containing a preservative. The user can arbitrarily set the cleaning operation with the cleaning water containing the preservative. Next, in the treatment 956 for generated dust, moisture is removed from both the fiber and the ink to solidify.

  According to the present embodiment, the storage tank 21 is provided, and the capacity of the storage tank 21 is N times or more of the reclaimed pulp processing amount per processing unit of the batch processing of the pulper 14, so that the processing unit of the pulper 14 The papermaking unit 3 can be operated continuously without being limited by the amount, the amount of initial recycled paper and final recycled paper including unstable quality parts can be suppressed, and the entire machine can be operated. Efficiency is improved.

  In addition, the regenerated pulp supply amount that the storage tank 21 supplies the regenerated pulp to the downstream side within the processing time required by the pulper 14 per processing unit shall not exceed the regenerated pulp processing amount that the pulper processes per processing unit. As a result, as long as the supply from the pulper 14 continues, the recycled pulp-containing liquid can always be supplied from the storage tank 21 to the downstream pre-deinking dilution tank 22 and the papermaking unit 3 can be operated continuously.

Therefore, it is possible to suppress the generation amount of the initial recycled paper and the final recycled paper including the unstable portion.
In the present embodiment, when the number of the pulper 14 is one, the storage tank 21 is provided so that the papermaking unit 3 can be operated continuously without being limited by the processing unit amount of the pulper 14.

  However, as shown in FIG. 14, even by using a plurality of pulpers 14, it is possible to realize continuous operation of the paper making unit 3 without being limited by the processing unit amount of the pulpers 14. That is, by making it possible to supply the recycled pulp-containing liquid from each pulper 14 to the fiber concentration adjusting unit 15 and to optionally switch a plurality of pulpers 14, from each pulper 14 via the deinking unit 23, It is possible to continuously supply the recycled pulp-containing liquid to the papermaking unit 3.

  Here, although two pulpers 14 are disclosed, the number of pulpers 14 is the processing time that the pulpers 14 require per processing unit, and the amount of recycled pulp supplied by the storage tank 21 to the downstream side. Set in the relationship. For example, when the recycled pulp supply amount that the storage tank 21 supplies the recycled pulp to the downstream side within the processing time that the pulper 14 requires per processing unit is made equal to the recycled pulp processing amount that the pulper processes per processing unit. By supplying the regenerated pulp-containing liquid alternately from the two pulpers 14, it is possible to always supply the regenerated pulp-containing liquid from the storage tank 21 to the downstream pre-deinking dilution tank 22.

  In addition, as shown in FIG. 15, a plurality of pulpers 14 are provided, a recycled pulp-containing liquid can be supplied from each pulper 14, and a plurality of pulpers 14 are optionally switchable, and at least one pulper 14 has The cutting paper piece of the surplus paper piece of recycled paper is put in, and this pulper 14 supplies the recycled pulp-containing liquid directly to the papermaking unit 3, and the other pulper 14 supplies the recycled pulp-containing liquid to the deinking unit 23. It is possible to realize continuous operation of the paper making unit 3 without being limited by the processing unit amount of the pulper 14.

  That is, as shown in FIG. 7, the surplus paper piece conveyance unit 43 is provided between the cut unit 42 and the predetermined pulper 14. The surplus paper piece conveyance unit 43 includes a hopper 431 disposed below the slit / cut unit 421 and a cyclone separator 432 disposed above the pulper 14, and a blower 433 was provided between the hopper 431 and the cyclone separator 432. An air transport system 434 is provided.

  In this way, the air transport system 434 can be arranged in a free layout by transporting surplus paper pieces using air. By adopting the air conveyance system 434 having a high degree of freedom, even when the distance from the cut portion 42 to the hopper 431 is large, it is possible to convey the surplus paper piece with a simple configuration compared to the conventional surplus paper piece belt conveyance method. Can be realized.

  The surplus paper piece transport unit 43 puts a cut piece of the surplus paper piece generated in the slit / cut unit 421 of the cut unit 42 into the hopper 431 and separates the cut paper piece into the cyclone using air supplied from the blower 433 to the air transport system 434 as a transport medium. The cut paper pieces conveyed to the machine 432 and separated by the cyclone separator 432 are supplied to a predetermined pulper 14. The pulper 14 supplies the recycled pulp-containing liquid directly to the papermaking unit 3.

By supplying the regenerated pulp-containing liquid from each pulper 14 alternately, it is possible to always supply the regenerated pulp-containing liquid to the paper making unit 3.
The surplus paper pieces generated when the recycled paper is cut into a standard shape are quickly disaggregated and do not require deinking processing, so the processing time of the pulper 14 can be shortened and recycled to the recycled paper without deinking processing. This increases the recycling rate of used paper, increases its usefulness as an environmental device, and improves work efficiency by eliminating the deinking process.

  Further, since the recycled paper once regenerated can be sufficiently disaggregated even if the processing time of the pulper 14 is shortened or the disaggregation energy is reduced, the following processing can be performed.

Example 1
The setting of the disaggregation time is switched between commercially available paper (non-recycled paper) and paper recycled by the used paper processing apparatus. In this case, the user instructs to set whether the paper as the raw material is a commercially available paper or a recycled paper recycled by the used paper processing apparatus.

Example 2
If there is a mixture of commercially available paper (non-recycled paper) and paper recycled with a used paper processing device, disaggregate the commercially available paper first, and then disaggregate the recycled paper recycled with the used paper processing device. Total disaggregation time can be shortened.

DESCRIPTION OF SYMBOLS 1 Recycled pulp part 2 Deinking pulp part 3 Paper making part 4 Finishing part 5 Waste water treatment part 6 Waste paper 7 Control part 11 Standard paper tank 12 Shredder tank 13 Fiber quantity adjustment part 14 Pulper 15 Fiber density adjustment part 21 Storage tank 22 Before deinking Dilution tank 23 Deinking part 31 Head box 32 Wire part 33 Dewatering part 34 Press part 35 Dryer part 41 Calendar part 42 Cut part 43 Surplus paper piece transport part 51 White water tank 52 Waste water treatment part 61 Cutting paper piece 71 CPU
73 Timing input unit 74 Display unit 75 Operation interruption instruction means 100 Recycled paper 101 Solvent supply system 102 Transfer system 103 Concentration adjustment liquid supply system 104 Diluted water supply system 105 Papermaking drainage system 106 Deinking drainage system 107 Replenishment water supply system 121 Upper opening 122 Bottom surface 123 Discharge port 124 Discharge device 125 Quantity measuring sensor 131 Dish part 132 Weighing part 131a Receiving part 131b Side wall part 141 Tank body 142 Stirring blade 143 Heater 144 Temperature sensor 201 Transfer system 202a, 202c Transfer system 202b, 202d Valve 231 Front tank 232 Rear tank 233 Partition wall 234, 235 Heater 236 Spout 237 Stirring blade 238 Temperature sensor 321, 322 Roll 323 Mesh belt 331 Roller 332 Water absorption belt 333 Paper 334 Dehydration roller 341 Roller 351 Roller 35 Conveying belt 353 Drying roller 354 Temperature sensor 411 Press roller 421 Slit / cut unit 431 Hopper 432 Cyclone separator 433 Blower 434 Air conveying system 711 Recycled pulp section control function section 712 Deinking pulp section control function section 713 Paper making section control function section 714 Finishing section control function section 715 Wastewater treatment section control function section 716 Automatic operation control function section 717 Operation lock control function section 718 Target number setting function section 719 Counter function section 720 Drainage operation control function section 721 Cleaning operation control function section 722 Expected number of reproduction Calculation function section 723 Time setting function section 724 Operation time integration function section 725 Operation stop selection function section 726 Expected regeneration time calculation function section 727 Power mode selection function section 728 Operation stop time measurement function section 729 Operation stop cause determination function section

Claims (7)

It has a raw material storage part that stores used paper or waste paper pieces as recycled raw material and supplies the recycled raw material to the recycled pulp part in the subsequent stage, and a pulper that separates the recycled raw material to prepare recycled pulp. A deinked pulp section that supplies recycled pulp to the section, a deinking section that bleaches the recycled pulp and prepares deinked pulp, and supplies the deinked pulp to the subsequent papermaking section, and deinking In a used paper processing apparatus equipped with a paper making section that makes pulp and prepares recycled paper,
In the middle of the transfer path for transferring recycled pulp from the pulper to the deinking section, a storage tank is provided that continuously supplies the recycled pulp to the downstream side while storing a predetermined amount of recycled pulp flowing from the upstream side of the transfer path. Used paper processing equipment. It has a raw material storage section that stores used paper or cut pieces of used paper as recycled raw materials and supplies the recycled raw materials to the recycled pulp section in the subsequent stage, and a pulper that separates the recycled raw materials and prepares recycled pulp, to the subsequent paper making section. In a used paper processing apparatus comprising a recycled pulp section for supplying recycled pulp and a papermaking section for making recycled paper by making recycled pulp,
A storage tank is provided in the middle of the transfer path for transferring the recycled pulp from the pulper to the papermaking unit, while storing a predetermined amount of the recycled pulp flowing from the upstream side of the transfer path and continuously supplying the recycled pulp to the downstream side. Used paper processing equipment.   The used paper processing apparatus according to claim 1 or 2, wherein the storage tank has a capacity of N times or more of a recycled pulp processing amount per processing unit of the pulper.   The storage tank has a regenerated pulp supply amount for supplying regenerated pulp to the downstream side within a processing time required per processing unit of the pulper, and does not exceed a regenerated pulp processing amount per processing unit of the pulper. The used paper processing apparatus according to any one of 3 above. It has a raw material storage part that stores used paper or waste paper pieces as recycled raw material and supplies the recycled raw material to the recycled pulp part in the subsequent stage, and a pulper that separates the recycled raw material to prepare recycled pulp. A deinked pulp section that supplies recycled pulp to the section, a deinking section that bleaches the recycled pulp and prepares deinked pulp, and supplies the deinked pulp to the subsequent papermaking section, and deinking In a used paper processing apparatus equipped with a paper making section that makes pulp and prepares recycled paper,
A used paper processing apparatus characterized in that a plurality of pulpers are provided so as to be selectively switchable, and recycled pulp is continuously supplied from each pulper to the deinking section. It has a raw material storage section that stores used paper or cut pieces of used paper as recycled raw materials and supplies the recycled raw materials to the recycled pulp section in the subsequent stage, and a pulper that separates the recycled raw materials and prepares recycled pulp, to the subsequent paper making section. In a used paper processing apparatus comprising a recycled pulp section for supplying recycled pulp and a papermaking section for making recycled paper by making recycled pulp,
A used paper processing apparatus characterized in that a plurality of pulpers are provided so as to be selectively switchable, and recycled pulp is continuously supplied from each pulper to the deinking section. It has a raw material storage part that stores used paper or waste paper pieces as recycled raw material and supplies the recycled raw material to the recycled pulp part in the subsequent stage, and a pulper that separates the recycled raw material to prepare recycled pulp. A deinked pulp section that supplies recycled pulp to the section, a deinking section that bleaches the recycled pulp and prepares deinked pulp, and supplies the deinked pulp to the subsequent papermaking section, and deinking In a used paper processing apparatus equipped with a paper making section that makes pulp and prepares recycled paper,
A plurality of pulpers are optionally switchable, at least one of the pulpers supplies recycled pulp to the papermaking unit, the other pulpers supply recycled pulp to the deinking unit, and the recycled paper is supplied to the at least one pulper. A waste paper processing apparatus for feeding a cut piece of excess paper.

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