JP5870336B2 - Waste paper disaggregation processing apparatus, waste paper recycling processing apparatus, and waste paper disaggregation processing method - Google Patents

Waste paper disaggregation processing apparatus, waste paper recycling processing apparatus, and waste paper disaggregation processing method Download PDF

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JP5870336B2
JP5870336B2 JP2012071684A JP2012071684A JP5870336B2 JP 5870336 B2 JP5870336 B2 JP 5870336B2 JP 2012071684 A JP2012071684 A JP 2012071684A JP 2012071684 A JP2012071684 A JP 2012071684A JP 5870336 B2 JP5870336 B2 JP 5870336B2
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disaggregation
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deinking
paper
value
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高橋 克典
克典 高橋
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Duplo Seiko Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/64Paper recycling

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本発明は古紙の離解処理装置、古紙再生処理装置及び古紙の離解処理方法に関するものである。   The present invention relates to a used paper disaggregation processing apparatus, a used paper recycling processing apparatus, and a used paper disaggregation processing method.

古紙が再生利用される際、パルパー内で水とともにロータにより攪拌され、離解処理される方法が知られている。下記特許文献1には、制御装置が、古紙の離解処理に用いるロータを回転駆動する電動モータの負荷電流に応じ、ロータが詰まったときにロータを反転させる技術が開示されている。   A method is known in which when used paper is recycled, it is stirred by a rotor with water in a pulper and disaggregated. Patent Document 1 listed below discloses a technique in which a control device reverses a rotor when the rotor is clogged in accordance with a load current of an electric motor that rotationally drives the rotor used for waste paper disaggregation processing.

特開2011-42917号公報JP 2011-42917 A

上記特許文献1では、処理される古紙の種類や周囲の環境等によっては、該古紙の離解が十分になされない場合がある。そのような離解不十分の古紙を抄紙すると、得られる再生紙の品質が低下しやすい。 In Patent Document 1, depending on the type of used paper to be processed and the surrounding environment, the used paper may not be sufficiently disaggregated. When such paper with insufficient disaggregation is made, the quality of the obtained recycled paper is likely to deteriorate.

本発明は上記した課題を解決するものであり、古紙の種類や周囲の環境等にかかわらず、古紙の離解処理を適正に行うことが可能であり、離解処理が過剰に延長されるのを防止することができる古紙の離解処理装置及び古紙の離処理方法の提供を目的とする。 The present invention solves the above-described problems , and can properly disaggregate waste paper regardless of the type of waste paper and the surrounding environment , and prevent the disaggregation process from being excessively extended. It is an object of the present invention to provide a used paper disaggregation processing apparatus and a used paper separation processing method.

上記目的を達成するために、本発明にかかる古紙の離解処理装置によれば、古紙を離解して古紙パルプ液を製造し、得られた古紙パルプ液を抄紙して再生紙を製造する古紙再生処理装置に用いる古紙の離解処理装置であって、古紙を給水部から供給された水とともに攪拌し、離解処理する攪拌羽根を備えた攪拌槽と、前記攪拌羽根を駆動する駆動部と、前記駆動部の回転負荷を検出する負荷検出器と、前記負荷検出器の検出した値に基づいて、古紙の離解処理を制御する制御部とを備え、制御部は、負荷検出器が検出した値を予め設定した閾値と比較し、前記負荷の検出値が閾値以上のとき、古紙の離解処理を所定の延長単位時間だけ延長するよう制御し、前記離解処理の延長の前後で駆動部の回転負荷の変化率が所定値以上の場合には、更なる離解処理の延長を行い、所定値を下回る場合には、更なる延長を行うことなく離解処理を終了するIn order to achieve the above-mentioned object, according to the used paper disaggregation processing apparatus according to the present invention, a used paper pulp is produced by separating the used paper to produce a used paper pulp liquid, and producing a recycled paper by making the obtained used paper pulp liquid. A used paper disaggregation processing apparatus used for a processing apparatus, which stirs used paper together with water supplied from a water supply unit, and includes a stirring tank provided with a stirring blade for disaggregating, a drive unit for driving the stirring blade, and the drive A load detector that detects the rotational load of the unit, and a control unit that controls the disaggregation processing of the waste paper based on the value detected by the load detector, and the control unit previously determines the value detected by the load detector. When the load detection value is equal to or greater than the threshold value, the used paper disaggregation process is controlled to be extended by a predetermined extension unit time, and the rotational load change of the drive unit before and after the disaggregation process is extended. If the rate is above the specified value, That performs extension of maceration processing, if below a predetermined value, and ends the maceration process without further extension.

そして、前記構成において、制御部は、所定の延長単位時間の延長を複数回実行可能とするよう制御する。 In the above configuration, the control unit performs control so that the extension of the predetermined extension unit time can be executed a plurality of times.

更に、前記各構成において、負荷検出器は、駆動部としての駆動モータに流れる電流値を検出する電流検出器により構成される。 Further, in each of the above-described configurations, the load detector is configured by a current detector that detects a current value flowing through a drive motor as a drive unit.

また、本発明にかかる古紙再生処理装置は、前記各構成の古紙の離解処理装置を備えた。 Further, a used paper recycling processing apparatus according to the present invention includes the used paper disaggregation processing device having the above-described configuration.

また、本発明にかかる古紙の離解処理方法は、古紙を給水部から供給された水とともに攪拌羽根を用いて攪拌槽内で攪拌し、離解処理する古紙の離解処理方法であって、攪拌羽根を回転駆動する駆動部の回転負荷を検出し、検出した回転負荷の値を予め設定した閾値と比較し、前記負荷の値が閾値以上のとき、離解処理を延長し、前記離解処理の延長の前後で駆動部の回転負荷の変化率が所定値以上の場合には、更なる離解処理の延長を行い、所定値を下回る場合には、更なる延長を行うことなく離解処理を終了する。 The waste paper disaggregation method according to the present invention is a waste paper disaggregation method in which waste paper is agitated in a stirring tank using a stirring blade together with water supplied from a water supply unit, and is disaggregated. The rotational load of the drive unit to be rotated is detected, the detected rotational load value is compared with a preset threshold value, and when the load value is equal to or greater than the threshold value, the disaggregation process is extended, and before and after the disaggregation process is extended When the rate of change in the rotational load of the drive unit is greater than or equal to a predetermined value, the disaggregation process is further extended. When the rate of change is below the predetermined value, the disaggregation process is terminated without further extension .

本発明にかかる古紙の離解処理装置によれば、古紙を給水部から供給された水とともに攪拌し、離解処理する攪拌羽根を備えた攪拌槽と、前記攪拌羽根を駆動する駆動部と、前記駆動部の回転負荷を検出する負荷検出器と、前記負荷検出器の検出した値に基づいて、古紙の離解処理を制御する制御部とを備え、前記制御部は、負荷検出器が検出した値を予め設定した閾値と比較し、前記負荷の検出値が閾値以上のとき、古紙の離解処理を所定の延長単位時間だけ延長するよう制御し、前記離解処理の延長の前後で駆動部の回転負荷の変化率が所定値以上の場合には、更なる離解処理の延長を行い、所定値を下回る場合には、更なる延長を行うことなく離解処理を終了するので、攪拌羽根の駆動部の回転負荷を基に古紙の離解状態を把握し、適正に離解処理を行うよう制御することができ、制御部は、駆動部の回転負荷が大きく離解が不十分であると判断されるときは、所定の延長単位時間だけ延長して離解処理を行うことができる。また、実際の古紙の状態に即して離解処理を実行することができ、離解処理が過剰に延長されるのを防止することができる。 According to the used paper disaggregation processing apparatus according to the present invention, the used paper is stirred together with the water supplied from the water supply unit, the stirring tank provided with the stirring blade for performing the disaggregation processing, the driving unit that drives the stirring blade, and the drive A load detector that detects the rotational load of the unit, and a control unit that controls the disaggregation processing of the waste paper based on the value detected by the load detector , wherein the control unit uses the value detected by the load detector. Compared with a preset threshold value, when the detected value of the load is equal to or greater than the threshold value, the waste paper disaggregation process is controlled to be extended by a predetermined extension unit time, and the rotational load of the drive unit before and after the extension of the disaggregation process is controlled. When the rate of change is greater than or equal to a predetermined value, the disaggregation process is further extended. When the rate of change is less than the predetermined value, the disaggregation process is terminated without further extension. Based on the To be controlled to perform the defibration process, the control unit when the rotation load of the drive unit is large and macerating is judged to be insufficient, to perform the maceration process is extended by a predetermined extension unit time Can do. Moreover, in line with the actual waste paper state can be executed maceration process, Ru it is possible to prevent the maceration process is excessively prolonged.

そして、制御部は、所定の延長単位時間の延長を複数回実行可能とするよう制御する場合は、1回のみの延長では、古紙の離解がまだ不十分であるとき、更なる離解処理を実行し、古紙の離解を進めることができる。 When the control unit performs control so that the extension of the predetermined extension unit time can be executed a plurality of times, if the extension of only one time is still insufficient, the further disaggregation processing is executed. And we can proceed with disaggregation of waste paper.

更に、負荷検出器は、駆動部としての駆動モータに流れる電流値を検出する電流検出器により構成される場合は、駆動モータの回転負荷の量を容易に把握し、離解処理の制御に用いることができる。 Furthermore, when the load detector is composed of a current detector that detects the value of the current flowing through the drive motor as a drive unit, the load detector can easily grasp the amount of rotational load of the drive motor and use it for control of disaggregation processing. Can do.

そして、本発明にかかる古紙再生処理装置は、負荷検出器の検出した値に基づいて、離解処理が制御され、負荷検出器が検出した値を予め設定した閾値と比較し、前記負荷の検出値が閾値以上のとき、古紙の離解処理を所定の延長単位時間だけ延長するよう制御し、前記離解処理の延長の前後で駆動部の回転負荷の変化率が所定値以上の場合には、更なる離解処理の延長を行い、所定値を下回る場合には、更なる延長を行うことなく離解処理を終了する古紙の離解処理装置を備えたので、離解処理を不足することなく適正に行って古紙パルプ液を調製することができ、得られた古紙パルプ液を抄紙部で抄紙することで、得られる再生紙の品質を向上可能である。また、離解処理が過剰に延長されるのを防止することができる。 The used paper recycling apparatus according to the present invention controls the disaggregation process based on the value detected by the load detector, compares the value detected by the load detector with a preset threshold value, and detects the load detection value. When the value is equal to or greater than the threshold value, control is performed to extend the disaggregation process of the waste paper by a predetermined extension unit time, and if the rate of change in the rotational load of the drive unit is greater than or equal to a predetermined value before and after the extension of the disaggregation process, It performs extension of maceration processing, if below a predetermined value, so with a paper maceration processing apparatus you exit the maceration process without further extension, go to properly without missing the maceration processing used paper A pulp liquid can be prepared, and the quality of the obtained recycled paper can be improved by making the used paper pulp liquid in the paper making section. Moreover, it is possible to prevent the disaggregation process from being excessively extended.

そして、本発明にかかる古紙の離解処理方法は、攪拌羽根を回転駆動する駆動部の回転負荷を検出し、検出した回転負荷の値を予め設定した閾値と比較し、前記負荷の値が閾値以上のとき、離解処理を延長し、前記離解処理の延長の前後で駆動部の回転負荷の変化率が所定値以上の場合には、更なる離解処理の延長を行い、所定値を下回る場合には、更なる延長を行うことなく離解処理を終了するので、駆動部の回転負荷を閾値と比較するという簡単な方法により、容易に古紙の離解状態を把握することができ、離解が不十分であると判断される場合、離解処理を延長することができる。よって、古紙を適正に離解処理して古紙パルプ液を製造し、得られた古紙パルプ液を抄紙して得られる再生紙の品質を向上可能であり、また、離解処理が過剰に延長されるのを防止することができる。 The waste paper disaggregation processing method according to the present invention detects the rotational load of the drive unit that rotationally drives the stirring blade, compares the detected rotational load value with a preset threshold value, and the load value is equal to or greater than the threshold value. In this case, the disaggregation process is extended, and when the rate of change of the rotational load of the drive unit is greater than or equal to a predetermined value before and after the extension of the disaggregation process, the disaggregation process is further extended. Because the disaggregation process is completed without further extension, the disaggregation state of the waste paper can be easily grasped by a simple method of comparing the rotational load of the drive unit with the threshold, and disaggregation is insufficient. If it is determined, the disaggregation process can be extended. Therefore, by properly macerated used paper and manufacturing used paper pulp solution, Ri upgradeable der quality of recycled paper obtained by papermaking and the resulting waste paper pulp solution, also maceration process is excessively prolonged Can be prevented.

本発明の一実施形態に係る古紙再生処理装置の構成概略図である。1 is a schematic configuration diagram of a used paper recycling processing apparatus according to an embodiment of the present invention. 前記古紙再生処理装置の古紙供給部の構成概略図である。FIG. 2 is a schematic configuration diagram of a used paper supply unit of the used paper recycling processing apparatus. 前記古紙再生処理装置の古紙供給部の一部及び古紙パルプ製造部の構成概略図である。It is the structure schematic of a part of used paper supply part of the said used paper reproduction | regeneration processing apparatus, and a used paper pulp manufacturing part. 前記古紙再生処理装置の脱墨部の平面図である。It is a top view of the deinking part of the said used paper reproduction | regeneration processing apparatus. 前記古紙再生処理装置の抄紙部の構成概略図である。It is the structure schematic of the paper making part of the said used paper reproduction | regeneration processing apparatus.

以下、本発明の実施の形態を図面に基づいて説明する。図1は、本発明にかかる古紙再生処理装置の構成概略図である。古紙再生処理装置1は、古紙10を離解して古紙パルプ液を製造し、得られた古紙パルプ液を抄紙して再生紙を製造する。図1において、古紙再生処理装置1は、古紙供給部2、古紙パルプ製造部3、脱墨部5、抄紙部6、仕上げ部7を備えている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a used paper recycling apparatus according to the present invention. The used paper recycling processor 1 disaggregates the used paper 10 to produce a used paper pulp liquid, and makes the obtained used paper pulp liquid to produce recycled paper. In FIG. 1, the used paper recycling apparatus 1 includes a used paper supply unit 2, a used paper pulp manufacturing unit 3, a deinking unit 5, a paper making unit 6, and a finishing unit 7.

(古紙供給部)
図2は、古紙供給部2の構成概略図である。古紙供給部2は、分離搬送部21、細断部22、細断屑貯留部23及び細断屑搬送部24を備えている。分離搬送部21は、載置台211を備えており、この載置台211上に載置された古紙10のうち最上位の古紙10を分離し、細断部22に搬送する。細断部22は、一対の細断刃221を備えている。細断屑貯留部23は、生成した細断屑11を貯留する。細断屑搬送部24は、細断屑貯留部23の下部より下方に排出された細断屑11を空気流によって古紙パルプ製造部3へ搬送する。細断屑搬送部24は、送風機241、搬送用ダクト242、及び図3に示す細断屑11の放出用サイクロン243を備えている。
(Waste Paper Supply Department)
FIG. 2 is a schematic configuration diagram of the used paper supply unit 2. The used paper supply unit 2 includes a separation transport unit 21, a shredder unit 22, a shredded waste storage unit 23, and a shredded waste transport unit 24. The separating and conveying unit 21 includes a mounting table 211, and separates the uppermost used paper 10 out of the used paper 10 placed on the mounting table 211 and conveys it to the shredding unit 22. The shredded portion 22 includes a pair of shredded blades 221. The shredded waste storage unit 23 stores the generated shredded waste 11. The shredded waste transport unit 24 transports the shredded waste 11 discharged downward from the lower part of the shredded waste storage unit 23 to the used paper pulp manufacturing unit 3 by an air flow. The shredded waste transport unit 24 includes a blower 241, a transport duct 242, and a cyclone 243 for discharging shredded waste 11 shown in FIG.

(古紙パルプ製造部)
図3は、放出用サイクロン243及び古紙パルプ製造部3の構成概略図である。古紙パルプ製造部3は、古紙10を離解して古紙パルプ液を製造する古紙の離解処理装置Pにより構成される。古紙パルプ製造部3は、計量部31、攪拌槽32を備えている。計量部31は、細断屑搬送部24により搬送された細断屑11の重量を計測する。攪拌槽32は、古紙10を水とともに攪拌し、離解処理する。この攪拌槽32には、古紙10が細断されてなる計量後の細断屑11が投入され、給水部28から水が供給される。攪拌槽32の下部には細断屑11と水とを攪拌する攪拌手段34と、攪拌手段34の攪拌によって製造された古紙パルプ液を取り出す取出部35とを備えている。攪拌手段34は、攪拌羽根341と、前記攪拌羽根341を回転駆動するモータ等の駆動部342と、駆動部342の回転負荷を検出する負荷検出器37とを備えている。負荷検出器37は、駆動部342としての駆動モータに流れる電流値を検出する電流検出器38により構成される。電流検出器38は、増幅回路等を備えて駆動部342に流れる電流を検出する。
(Recycled Paper Pulp Production Department)
FIG. 3 is a schematic configuration diagram of the discharge cyclone 243 and the used paper pulp manufacturing unit 3. The used paper pulp manufacturing unit 3 includes a used paper disaggregation processing device P that disaggregates the used paper 10 to produce a used paper pulp liquid. The used paper pulp manufacturing unit 3 includes a measuring unit 31 and a stirring tank 32. The weighing unit 31 measures the weight of the shredded waste 11 transported by the shredded waste transporting unit 24. The stirring tank 32 stirs the waste paper 10 together with water and disaggregates it. The agitating tank 32 is fed with the shredded scraps 11 after weighing, in which the waste paper 10 is shredded, and water is supplied from the water supply unit 28. At the lower part of the stirring tank 32, there are provided stirring means 34 for stirring the shredded waste 11 and water, and a take-out portion 35 for taking out used paper pulp liquid produced by stirring by the stirring means 34. The stirring unit 34 includes a stirring blade 341, a driving unit 342 such as a motor that rotationally drives the stirring blade 341, and a load detector 37 that detects a rotational load of the driving unit 342. The load detector 37 is configured by a current detector 38 that detects a current value flowing through a drive motor as the drive unit 342. The current detector 38 includes an amplifier circuit and the like, and detects a current flowing through the drive unit 342.

また、攪拌槽32の上方には、後段の脱墨部5での脱墨処理の際に必要となる脱墨剤を供給する脱墨剤供給部29が設置される。 In addition, a deinking agent supply unit 29 that supplies a deinking agent necessary for the deinking process in the subsequent deinking unit 5 is installed above the stirring tank 32.

(脱墨部)
図4は、脱墨部5の平面図を示す。脱墨部5は、古紙の離解処理装置Pで製造された古紙パルプ液を脱墨処理する脱墨装置Bにより構成される。脱墨部5は、脱墨槽51、ブレード53及び受泡槽55を備えている。脱墨槽51は、内部に複数の仕切り壁52が並設され、古紙パルプ液の流通路が蛇行して形成される。脱墨槽51の底面には、脱墨槽51内に空気を供給する空気供給部30が設けられる。また、図4における脱墨槽51の底面の左上隅及び右上隅に、古紙パルプ液を脱墨槽51内へ流入させる流入部56と、脱墨処理後の古紙パルプ液を流出させる流出部57とがそれぞれ設けられている。
(Deinking part)
FIG. 4 is a plan view of the deinking unit 5. The deinking unit 5 includes a deinking device B that performs deinking processing on the used paper pulp liquid produced by the used paper disaggregation processing device P. The deinking unit 5 includes a deinking tank 51, a blade 53, and a foam receiving tank 55. In the deinking tank 51, a plurality of partition walls 52 are arranged in parallel, and a flow path for waste paper pulp liquid is formed by meandering. An air supply unit 30 that supplies air into the deinking tank 51 is provided on the bottom surface of the deinking tank 51. In addition, in the upper left corner and the upper right corner of the bottom surface of the deinking tank 51 in FIG. 4, an inflow part 56 that allows the used paper pulp liquid to flow into the deinking tank 51 and an outflow part 57 that causes the used paper pulp liquid after the deinking process to flow out. And are provided respectively.

更に、脱墨槽51の上方の、流出部58のほぼ真上に相当する位置には、古紙パルプ液の脱墨割合を検出する脱墨割合検出器58が設けられている。脱墨割合検出器58としては、古紙パルプ液を貯留する脱墨槽51の上部の画像データを取得するCCDカメラやCMOSカメラ等の画像取得部材59により構成される。画像取得部材59は、脱墨槽51の上部に浮上した泡沫の状態を撮影して画像データとして取得し、制御部8へ送る。 Further, a deinking ratio detector 58 for detecting the deinking ratio of the used paper pulp liquid is provided at a position above the deinking tank 51 and just above the outflow portion 58. The deinking ratio detector 58 includes an image acquisition member 59 such as a CCD camera or a CMOS camera that acquires image data of the upper portion of the deinking tank 51 that stores used paper pulp liquid. The image acquisition member 59 captures the state of the foam that has floated above the deinking tank 51, acquires it as image data, and sends it to the control unit 8.

ブレード53は、脱墨槽51の上方に設置され、図4において上下方向に移動可能である。ブレード53は、脱墨槽51の上部を浮遊する泡沫を、脱墨槽51の周壁から溢流させ掃き出す。受泡槽55は、脱墨槽51の外周を取り囲んで設けられる。受泡槽55は、ブレード53により掃き出された泡沫を受け止める。 The blade 53 is installed above the deinking tank 51 and is movable in the vertical direction in FIG. The blade 53 causes the bubbles floating above the deinking tank 51 to overflow from the peripheral wall of the deinking tank 51 and sweep it out. The foam receiving tank 55 is provided so as to surround the outer periphery of the deinking tank 51. The foam receiving tank 55 receives the foam swept out by the blade 53.

(抄紙部)
図5は抄紙部6の構成概略図である。抄紙部6は、ヘッドボックス61、ワイヤー部62、脱水部63、乾燥部64を備えている。ヘッドボックス61は、箱状の貯留部611と、貯留部611の下部に配管613が接続されてなる古紙パルプ液の流入部614と、古紙パルプ液を貯留部611から溢流させ、ワイヤー部62へ流出させる流出部615とを備えている。
(Paper making)
FIG. 5 is a schematic configuration diagram of the paper making unit 6. The paper making unit 6 includes a head box 61, a wire unit 62, a dehydrating unit 63, and a drying unit 64. The head box 61 includes a box-shaped storage portion 611, a waste paper pulp liquid inflow portion 614 having a pipe 613 connected to the lower portion of the storage portion 611, and a waste paper pulp liquid overflowing from the storage portion 611, and a wire portion 62. And an outflow portion 615 for flowing out.

ワイヤー部62は、抄き網621を備えている。抄き網621は、無端状のメッシュベルトにより構成され、複数のローラ622に掛け渡される。図5において、右側のローラ622aは、ワイヤー駆動部623に連結され、ワイヤー駆動部623の駆動により抄き網621が周回走行する。 The wire part 62 includes a papermaking net 621. The papermaking net 621 is configured by an endless mesh belt and is stretched around a plurality of rollers 622. In FIG. 5, the right roller 622 a is connected to the wire driving unit 623, and the net 621 travels around by the driving of the wire driving unit 623.

抄き網621の上面に、ヘッドボックス61の流出部615から古紙パルプ液を流出させ、抄き網621で水切りして繊維の層をなす湿紙12を形成する。抄き網621の内方には、上側を走行する抄き網621の網目から流下する水を受ける受水部624を設けている。受水部624は図示しない白水タンクに接続され、受水した水を白水タンクへ導くようになっている。 Waste paper pulp liquid is allowed to flow out from the outflow portion 615 of the head box 61 on the upper surface of the paper net 621, and drained by the paper net 621 to form the wet paper 12 forming a fiber layer. A water receiving portion 624 that receives water flowing down from the mesh of the papermaking net 621 traveling on the upper side is provided inside the papermaking net 621. The water receiving unit 624 is connected to a white water tank (not shown) and guides the received water to the white water tank.

脱水部63は、吸水ベルト631を有する。吸水ベルト631は、フェルト等により構成され、複数のローラ632及びプレスローラ634bに掛け渡されている。この吸水ベルト631は、抄き網621から転移させた湿紙12を搬送するとともに、湿紙12から水分を吸収し、脱水する。 The dewatering unit 63 has a water absorption belt 631. The water absorption belt 631 is made of felt or the like, and is stretched around a plurality of rollers 632 and a press roller 634b. The water absorbing belt 631 conveys the wet paper 12 transferred from the papermaking net 621, absorbs moisture from the wet paper 12, and dehydrates it.

乾燥部64は、乾燥ベルト641、カンバス642、乾燥ローラ643を有する。乾燥ベルト641は、吸水ベルト631から転移された湿紙12を搬送する。この乾燥ベルト641は、ローラ645、プレスローラ634a及び乾燥ローラ643に掛け渡されている。 The drying unit 64 includes a drying belt 641, a canvas 642, and a drying roller 643. The drying belt 641 conveys the wet paper 12 transferred from the water absorption belt 631. The drying belt 641 is stretched around a roller 645, a press roller 634a, and a drying roller 643.

吸水ベルト631と乾燥ベルト641との接触部分に、脱水手段633を設けている。脱水手段633は一対のプレスローラ634a,634bからなり、該一対のプレスローラ634a,634bで、吸水ベルト631と乾燥ベルト641との間に挟んだ湿紙12を押圧して脱水する。脱水手段633を通過した湿紙12は、吸水ベルト631から乾燥ベルト641に転移される。   A dehydrating unit 633 is provided at a contact portion between the water absorbing belt 631 and the drying belt 641. The dehydrating means 633 includes a pair of press rollers 634a and 634b, and the pair of press rollers 634a and 634b presses and dehydrates the wet paper 12 sandwiched between the water absorbing belt 631 and the drying belt 641. The wet paper 12 that has passed through the dehydrating unit 633 is transferred from the water absorbing belt 631 to the drying belt 641.

図5において、上側のプレスローラ634aは、プレス駆動部637に連結され、プレス駆動部637の駆動により回転し、下側のプレスローラ634bは上側のプレスローラ634aの回転に伴って従動回転する。そして、両プレスローラ634a,634bの回転に伴って、吸水ベルト631及び乾燥ベルト641を走行させる。 In FIG. 5, an upper press roller 634a is connected to a press drive unit 637 and rotates by driving the press drive unit 637, and a lower press roller 634b rotates following the rotation of the upper press roller 634a. Then, the water absorption belt 631 and the drying belt 641 are caused to travel as the press rollers 634a and 634b rotate.

カンバス642は、網状をなす樹脂製であり、複数のローラ646に掛け渡され、展張されている。カンバス642は、乾燥ベルト641との間で湿紙12を挟持して搬送し、乾燥ベルト641を介して乾燥ローラ643に湿紙12を圧接させて乾燥させる。図5において、右側の上のローラ646aは、カンバス駆動部647に連結され、カンバス駆動部647の駆動によりカンバス642が周回走行する。 The canvas 642 is made of resin having a net shape, and is stretched over a plurality of rollers 646. The canvas 642 sandwiches and transports the wet paper 12 with the drying belt 641 and presses the wet paper 12 against the drying roller 643 via the drying belt 641 to dry it. In FIG. 5, the upper roller 646 a on the right side is connected to the canvas drive unit 647, and the canvas 642 travels around by the drive of the canvas drive unit 647.

乾燥ローラ643は複数の支持軸650により回転自在に支持される。乾燥ローラ643の内部には加熱手段648を備えている。加熱手段648としては電熱ヒータ等を用いることができる。また、乾燥ローラ643には、接触式の温度センサ649を設けており、この温度センサ649により乾燥ローラ643の表面温度を検出する。 The drying roller 643 is rotatably supported by a plurality of support shafts 650. A heating unit 648 is provided inside the drying roller 643. An electric heater or the like can be used as the heating means 648. The drying roller 643 is provided with a contact-type temperature sensor 649, and the surface temperature of the drying roller 643 is detected by the temperature sensor 649.

(仕上げ部)
図1に示す仕上げ部7は、図示しないカレンダー部及びカット部を有しており、カレンダー部は紙の平坦度を上げるための複数のプレスローラを備え、カット部は紙を所定のシートサイズにカットする裁断刃(図示省略)を備えている。
(Finishing part)
The finishing section 7 shown in FIG. 1 has a calendar section and a cutting section (not shown), the calendar section includes a plurality of press rollers for increasing the flatness of the paper, and the cutting section converts the paper into a predetermined sheet size. A cutting blade (not shown) for cutting is provided.

(制御部8)
制御部8は、CPUやメモリ等を備え、古紙供給部2、古紙パルプ製造部3、脱墨部5、抄紙部6、仕上げ部7の動作を制御する。また、制御部8は、古紙パルプ製造部3の攪拌手段34の回転開始および停止、速度等を制御する。
(Control unit 8)
The control unit 8 includes a CPU, a memory, and the like, and controls operations of the used paper supply unit 2, the used paper pulp manufacturing unit 3, the deinking unit 5, the paper making unit 6, and the finishing unit 7. The control unit 8 controls the rotation start and stop, the speed, and the like of the stirring means 34 of the used paper pulp manufacturing unit 3.

そして、制御部8は、負荷検出器37の検出した値に基づいて、古紙10の離解処理を制御する。より詳しくは、制御部8は、負荷検出器37が検出した値を予め設定した閾値と比較し、前記負荷の検出値が閾値以上のとき、古紙10の離解処理を所定時間延長するよう制御する。負荷検出器37として電流検出器38を用いる場合、前記電流検出器38の検出した電流値に基づいて、古紙10の離解処理を制御する。 And the control part 8 controls the disaggregation process of the used paper 10 based on the value which the load detector 37 detected. More specifically, the control unit 8 compares the value detected by the load detector 37 with a preset threshold value, and controls to extend the disaggregation process of the used paper 10 for a predetermined time when the detected value of the load is equal to or greater than the threshold value. . When the current detector 38 is used as the load detector 37, the disaggregation process of the used paper 10 is controlled based on the current value detected by the current detector 38.

処理対象である古紙10の厚さや種類、処理の際の環境温度等によっては、予め設定した所定時間の離解処理では、十分に古紙10が離解されていない場合がある。古紙10の離解が不十分であるとき、予め設定した所定の回転速度で攪拌羽根341を回転しようとすると、駆動部342の回転負荷が通常より大きくなり、駆動モータに流れる電流値が大きくなる。制御部8は、攪拌槽32内の古紙10の離解処理が十分に進行しているかどうかを、駆動部342の回転負荷の値を基に判断し、離解が不十分であるときは、離解処理を所定時間延長して行うよう制御することとしている。 Depending on the thickness and type of the used paper 10 to be processed, the environmental temperature at the time of processing, etc., there is a case where the used paper 10 is not sufficiently disaggregated in the disaggregation process for a predetermined time set in advance. When the disaggregation of the used paper 10 is insufficient, if the stirring blade 341 is rotated at a predetermined rotation speed set in advance, the rotational load of the drive unit 342 becomes larger than usual, and the value of the current flowing through the drive motor increases. The control unit 8 determines whether or not the disaggregation process of the used paper 10 in the agitation tank 32 is sufficiently advanced based on the value of the rotational load of the drive unit 342. If the disaggregation is insufficient, the disaggregation process is performed. Is controlled to be extended for a predetermined time.

制御部8が、離解処理を延長するかどうかを判断する目的で、駆動部342の回転負荷を負荷検出器37により検出するタイミングは、離解処理開始から所定時間経過した後とすることが好ましく、離解処理終了直前とするのがより好ましい。離解処理開始から所定時間経過した後には、通常は古紙10の離解が進行しており、駆動部342にかかる回転負荷が所定時間経過前より小さくなっている。この結果、駆動部342としての駆動モータに流れる電流値が小さい状態で安定してくるので、離解処理の不足を正確に判断できる。特に、離解処理の終了直前には、通常は古紙10の離解が十分に進行しており、駆動部342に流れる電流値が最も小さくなり、離解処理の不足をより正確に判断できる。 For the purpose of determining whether or not the disaggregation process is extended, the control unit 8 preferably detects the rotational load of the drive unit 342 by the load detector 37 after a predetermined time has elapsed from the start of the disaggregation process. It is more preferable to set it immediately before the disaggregation process ends. After a predetermined time has elapsed since the start of the disaggregation process, the disaggregation of the used paper 10 is usually progressing, and the rotational load applied to the drive unit 342 is smaller than before the predetermined time has elapsed. As a result, since the current value flowing through the drive motor as the drive unit 342 is stable in a small state, it is possible to accurately determine whether the disaggregation process is insufficient. In particular, immediately before the end of the disaggregation process, the disaggregation of the waste paper 10 is normally sufficiently progressed, and the current value flowing through the drive unit 342 becomes the smallest, so that the shortage of the disaggregation process can be determined more accurately.

制御部8が、負荷検出器37が検出した値を予め設定した閾値と比較するため、所定の積算時間だけ負荷の値を積算し、積算平均値を算出する。そして、この積算平均値が前記閾値以上であるかどうか比較を行う。積算平均値が閾値以上であるとき、制御部8は、離解処理の所定時間の延長を決定する。離解処理を延長する時間の長さは、所定の延長単位時間とする。なお、この延長単位時間は実験データ等を基に予め設定される。 In order to compare the value detected by the load detector 37 with a preset threshold value, the control unit 8 integrates the load value for a predetermined integration time, and calculates an integrated average value. Then, a comparison is made as to whether or not the integrated average value is equal to or greater than the threshold value. When the integrated average value is equal to or greater than the threshold value, the control unit 8 determines to extend the predetermined time for the disaggregation process. The length of time for extending the disaggregation process is a predetermined extension unit time. This extended unit time is set in advance based on experimental data and the like.

更に、制御部8は、延長した離解処理の終了直前にも、再度負荷検出器37の検出した負荷の値を用いて、離解処理の更なる延長を行うかどうかを決定する。2回目以降の離解処理の延長時間の長さは、1回目と同じ延長単位時間としてもよく、1回目より長くしてもよく、また、短くしてもよい。このように、制御部8は、古紙10の離解処理を、所定時間の延長を一単位として複数回延長可能としている。そして、制御部8は、負荷検出器37の検出した値に基づいた離解処理の延長を行うかどうかの判断を繰り返し行い、判断結果に応じて実行する。 Further, immediately before the end of the extended disaggregation process, the control unit 8 uses the load value detected by the load detector 37 again to determine whether to further extend the disaggregation process. The length of the extension time of the second and subsequent disaggregation processes may be the same extension unit time as the first time, may be longer than the first time, or may be shorter. As described above, the control unit 8 enables the disaggregation process of the used paper 10 to be extended a plurality of times with a predetermined time extension as one unit. Then, the control unit 8 repeatedly determines whether to extend the disaggregation process based on the value detected by the load detector 37, and executes it according to the determination result.

積算平均値が閾値より小さい場合には、制御部8は、古紙10の離解が十分に行われていると判断し、離解処理の終了を決定する。また、制御部8は、積算平均値が閾値より大きい場合であっても、実際に延長を行った回数が最大延長回数を超えると、新たな離解処理の延長を行わず離解処理を終了することを決定する。最大延長回数は、離解処理が過剰に延長されるのを防止するため、制御部8に予め設定されている。 When the integrated average value is smaller than the threshold value, the control unit 8 determines that the disaggregation of the used paper 10 is sufficiently performed, and determines the end of the disaggregation process. In addition, even when the integrated average value is larger than the threshold value, the control unit 8 ends the disaggregation process without extending the new disaggregation process when the number of actual extensions exceeds the maximum number of extension times. To decide. The maximum extension number is preset in the control unit 8 in order to prevent the disaggregation process from being excessively extended.

また、制御部8は、脱墨割合検出器58の検出に基づいて脱墨処理を制御する。そして、制御部8は、脱墨割合検出器58としての画像取得部材59が取得した画像データを基に脱墨割合を算出する。脱墨割合の算出は、画像データの色合いを数値化することで行う。制御部8は、得られた脱墨割合の数値を脱墨割合値とする。脱墨割合値は、画像データの色合いを数値に置き換えたものであり、取得した画像データにおける泡沫の色合いが、トナーの黒色等に着色されず白色が強いほど脱墨割合値が大きくなる。逆に、画像データにおける泡沫の色合いが、トナー等によって灰色乃至黒色に着色され、白色が弱いほど脱墨割合値が小さくなる。 Further, the control unit 8 controls the deinking process based on the detection by the deinking ratio detector 58. Then, the control unit 8 calculates the deinking ratio based on the image data acquired by the image acquisition member 59 as the deinking ratio detector 58. The deinking ratio is calculated by digitizing the color of the image data. The control unit 8 sets the obtained deinking ratio value as the deinking ratio value. The deinking ratio value is obtained by replacing the hue of the image data with a numerical value, and the deinking ratio value increases as the whiteness of the foam color in the acquired image data is not colored with toner black or the like. On the contrary, the color of the foam in the image data is colored from gray to black with toner or the like, and the deinking ratio value becomes smaller as the white color is weaker.

そして、制御部8は、算出した脱墨割合値を、予め設定されている脱墨割合の閾値と比較するため、所定の積算時間だけ脱墨割合値を積算し、脱墨割合の積算平均値を算出する。そして、この脱墨割合の積算平均値が閾値以上であるかどうか比較を行う。積算平均値が閾値以上であるとき、制御部8は、脱墨処理を所定時間延長することを決定する。脱墨処理を延長する時間の長さは、所定の延長単位時間とする。なお、この延長単位時間は実験データ等を基に予め設定される。 Then, in order to compare the calculated deinking rate value with a preset deinking rate threshold, the control unit 8 integrates the deinking rate value for a predetermined integration time, and the integrated average value of the deinking rate Is calculated. Then, it is compared whether or not the integrated average value of the deinking ratio is equal to or greater than a threshold value. When the integrated average value is equal to or greater than the threshold value, the control unit 8 determines to extend the deinking process for a predetermined time. The length of time for extending the deinking process is a predetermined extension unit time. This extended unit time is set in advance based on experimental data and the like.

脱墨割合検出器58から画像データを取得するタイミングは、脱墨処理開始から所定時間経過した後とすることが好ましく、脱墨処理終了直前とするのがより好ましい。脱墨槽51へ古紙パルプ液を送り、脱墨処理を開始した後所定時間経過した後には、脱墨処理がある程度進行しており、脱墨割合を正確に判断できるからであり、脱墨処理終了直前には、脱墨割合をより正確に判断可能である。 The timing for acquiring the image data from the deinking ratio detector 58 is preferably after a predetermined time has elapsed since the start of the deinking process, and more preferably immediately before the end of the deinking process. This is because the deinking process has progressed to some extent after a predetermined time has elapsed after the waste paper pulp liquid has been sent to the deinking tank 51 and the deinking process has started, and the deinking ratio can be accurately determined. Immediately before the end, the deinking ratio can be determined more accurately.

更に、制御部8は、古紙パルプ液の脱墨処理を所定時間の延長を一単位として複数回延長可能としている。よって、制御部8は、所定時間だけ延長した脱墨処理の終了直前にも、再度脱墨割合検出器58の検出に基づいて、脱墨処理の更なる延長を行うかどうかを決定する。2回目以降の脱墨処理の延長時間の長さは、1回目の延長単位時間と同じ長さとしてもよく、異なる長さとしてもよい。 Further, the control unit 8 can extend the deinking process of the used paper pulp liquid a plurality of times with a predetermined time extension as one unit. Therefore, the control unit 8 determines whether or not to further extend the deinking process based on the detection of the deinking ratio detector 58 again immediately before the end of the deinking process extended by a predetermined time. The length of the extended time for the second and subsequent deinking processes may be the same as the first extended unit time, or may be a different length.

脱墨割合の積算平均値が、閾値より小さい場合には、制御部8は、古紙パルプ液の脱墨が十分に行われていると判断し、脱墨処理の終了を決定する。また、制御部8は、脱墨割合の積算平均値が閾値より大きい場合であっても、所定の延長単位時間の延長を一単位として、この延長単位時間の延長を行った回数が最大延長回数を超えると、新たな脱墨処理の延長を行わず脱墨処理を終了することを決定する。最大延長回数は、脱墨処理が過剰に延長されるのを防止するため、制御部8に予め設定されている。 If the integrated average value of the deinking ratio is smaller than the threshold value, the control unit 8 determines that the used paper pulp liquid has been sufficiently deinked and determines the end of the deinking process. Further, even when the integrated average value of the deinking ratio is larger than the threshold, the control unit 8 sets the extension of the predetermined extension unit time as one unit, and the number of times of extension of the extension unit time is the maximum extension number. If it exceeds, it is decided to end the deinking process without extending the new deinking process. The maximum number of extension times is preset in the control unit 8 in order to prevent the deinking process from being excessively extended.

本実施形態にかかる古紙再生処理装置1の作用につき以下に説明する。制御部8は、図2に示す載置台211に載置された古紙10のうち最上の古紙10を一枚ずつ分離搬送部21により分離し細断部22へ搬送し、一対の細断刃221により細断する。生成した細断屑11を、細断屑貯留部23に貯留した後、送風機241を駆動することで、細断屑搬送部24により、図3に示す古紙パルプ製造部3の計量部31へ搬送する。 The operation of the used paper recycling apparatus 1 according to this embodiment will be described below. The control unit 8 separates the uppermost used paper 10 of the used paper 10 placed on the mounting table 211 shown in FIG. 2 one by one by the separating and conveying unit 21 and conveys it to the chopping unit 22, and a pair of chopping blades 221. Shred by. After the generated shredded waste 11 is stored in the shredded waste storage section 23, the blower 241 is driven so that the shredded waste transport section 24 transports the shredded waste 11 to the measuring section 31 of the used paper pulp manufacturing section 3 shown in FIG. 3. To do.

計量部31では、細断屑搬送部24により搬送され、放出用サイクロン243から放出された細断屑11の重量を計測し、細断屑11の重量が所定量に達した時点で、送風機241を止めて細断屑11の搬送を停止する。そして、計量後の細断屑11を攪拌槽32へ投入する。その後、給水部28から攪拌槽32へ給水を行い、攪拌手段34を作動することで、離解処理を開始し古紙パルプ液を調製する。 The weighing unit 31 measures the weight of the shredded waste 11 transported by the shredded waste transporting unit 24 and discharged from the discharge cyclone 243, and when the weight of the shredded waste 11 reaches a predetermined amount, the blower 241 Is stopped, and the conveyance of the shredded waste 11 is stopped. Then, the shredded scraps 11 after weighing are put into the stirring tank 32. Thereafter, water is supplied from the water supply unit 28 to the agitation tank 32 and the agitation means 34 is operated to start the disaggregation process and prepare a used paper pulp liquid.

離解処理は、例えば30分間といった所定の離解処理時間だけ行われる。そして、制御部8は、負荷検出器37の検出した値に基づいて、古紙10の離解処理を制御する。より具体的には、電流検出器38が検出した駆動部342の駆動モータに流れる電流値に基づいて、離解処理を延長するかどうかを決定する。即ち、例えば、離解処理終了の直前、離解処理開始から29分50秒の時点から例えば5秒間といった所定の積算時間だけ電流値を積算し、積算平均値を算出する。 The disaggregation processing is performed for a predetermined disaggregation processing time such as 30 minutes. And the control part 8 controls the disaggregation process of the used paper 10 based on the value which the load detector 37 detected. More specifically, whether to extend the disaggregation process is determined based on the value of the current flowing through the drive motor of the drive unit 342 detected by the current detector 38. That is, for example, immediately before the end of the disaggregation process, the current value is integrated for a predetermined integration time of, for example, 5 seconds from the time of 29 minutes 50 seconds from the start of the disaggregation process, and the integrated average value is calculated.

このように、本第1の実施形態では、負荷検出器37を、電流検出器38により構成したので、駆動部342としての駆動モータの回転負荷の値を容易に把握することができる。 As described above, in the first embodiment, since the load detector 37 is configured by the current detector 38, the value of the rotational load of the drive motor as the drive unit 342 can be easily grasped.

そして、制御部8は、算出した積算平均値を閾値と比較し、該積算平均値が閾値以上であったとき、例えば5分間といった所定の延長単位時間だけ離解処理を延長することを決定し、実行する。これより、制御部8は、古紙10の離解状態を容易かつ正確に把握することができ、積算平均値が閾値以上であり離解が不十分であると判断されるときは、離解処理を延長し、該離解処理を更に行うよう制御することができる。 Then, the control unit 8 compares the calculated integrated average value with a threshold value, and when the integrated average value is equal to or greater than the threshold value, determines to extend the disaggregation process by a predetermined extension unit time such as 5 minutes, Run. Thus, the control unit 8 can easily and accurately grasp the disaggregation state of the waste paper 10, and when it is determined that the integrated average value is equal to or greater than the threshold value and disaggregation is insufficient, the disaggregation process is extended. The disaggregation process can be further controlled.

その後、所定の延長単位時間延長した離解処理を終了する直前に、負荷検出器37としての電流検出器38は、再度、駆動部342の回転負荷を示す電流値を検出する。そして、制御部8は、電流検出器38が検出した値を基に、離解処理をもう1回延長するかどうかを決定し、決定した結果を実行する。制御部8は、このような駆動部342の回転負荷の値と閾値との比較を繰り返し行って、古紙10の離解が十分になされるよう制御する。 Thereafter, immediately before the disaggregation process extended for a predetermined extension unit time is finished, the current detector 38 as the load detector 37 detects the current value indicating the rotational load of the drive unit 342 again. Then, the control unit 8 determines whether to extend the disaggregation process once more based on the value detected by the current detector 38, and executes the determined result. The control unit 8 repeatedly compares the value of the rotational load of the driving unit 342 and the threshold value so as to sufficiently disaggregate the used paper 10.

このように制御部8は、古紙10の離解処理を複数回延長可能であるので、1回のみの延長では、古紙10の離解がまだ不十分であるとき、更なる離解処理を実行し、古紙10の離解を更に進めることができる。よって、この離解処理により製造された古紙パルプ液を抄紙して得られる再生紙13の品質を良好なものとできる。 As described above, the control unit 8 can extend the disaggregation process of the waste paper 10 a plurality of times. Therefore, when the disaggregation of the waste paper 10 is still insufficient with only one extension, the disintegration process is further performed. Ten disaggregations can be further advanced. Therefore, the quality of the recycled paper 13 obtained by papermaking the used paper pulp liquid manufactured by this disaggregation process can be made favorable.

制御部8は、積算平均値が閾値より小さい場合には、離解処理の終了を決定する。また、積算平均値が閾値以上であったとしても離解処理の延長回数が、例えば3回といった所定の最大延長回数を超える場合、制御部8は、新たな離解処理の延長を行わず、離解処理を終了することを決定する。 When the integrated average value is smaller than the threshold value, the control unit 8 determines the end of the disaggregation process. Further, even if the integrated average value is equal to or greater than the threshold value, if the number of times of disaggregation processing exceeds a predetermined maximum number of times such as 3, for example, the control unit 8 does not extend the new disaggregation processing and does the disaggregation processing. Decide to exit.

このように、古紙パルプ製造部3は、攪拌羽根341の駆動部342の回転負荷を検出する負荷検出器37を備え、制御部8は、この負荷検出器37の検出した値に基づいて、古紙10の離解処理を制御するので、予め設定した所定の離解処理時間の離解処理では、十分に古紙10が離解されない恐れがある場合に、攪拌羽根341の駆動部342の回転負荷を基に古紙10の離解状態を把握し、適正に離解処理を行うよう制御することができる。よって、処理対象である古紙10の厚さや種類、処理の際の環境温度等に影響されることなく、古紙10を適正に離解処理して古紙パルプ液を製造し、得られた古紙パルプ液を抄紙して得られる再生紙13の品質を向上可能である。 As described above, the used paper pulp manufacturing unit 3 includes the load detector 37 that detects the rotational load of the drive unit 342 of the stirring blade 341, and the control unit 8 uses the detected value of the load detector 37 to change the used paper. 10 is controlled, the used paper 10 is based on the rotational load of the drive unit 342 of the stirring blade 341 when there is a possibility that the used paper 10 may not be sufficiently separated in the predetermined disaggregation processing time set in advance. The disaggregation state can be grasped, and control can be performed so that the disaggregation processing is appropriately performed. Therefore, without being affected by the thickness and type of the waste paper 10 to be treated, the environmental temperature at the time of treatment, etc., the waste paper 10 is appropriately disaggregated to produce a waste paper pulp liquid. The quality of the recycled paper 13 obtained by papermaking can be improved.

離解処理により調製された古紙パルプ液は、脱墨剤供給部29より脱墨剤が供給され、その後、取出部35から取出され、下流側の脱墨部5へ送られる。 The waste paper pulp liquid prepared by the disaggregation process is supplied with the deinking agent from the deinking agent supply unit 29, and then is extracted from the extraction unit 35 and sent to the deinking unit 5 on the downstream side.

図4に示す脱墨部5では、古紙パルプ液が流入部56より脱墨槽51内に流入される。そして、脱墨槽51内に収容された古紙パルプ液中に、空気供給部30から空気が供給され、脱墨処理が開始される。 In the deinking section 5 shown in FIG. 4, the waste paper pulp liquid flows into the deinking tank 51 from the inflow section 56. Then, air is supplied from the air supply unit 30 into the waste paper pulp liquid stored in the deinking tank 51, and the deinking process is started.

脱墨処理は例えば5分間といった所定の脱墨処理時間だけ行われる。制御部8は、脱墨割合検出器58の検出に基づいて脱墨処理を制御する。即ち、例えば、脱墨処理終了の直前となる脱墨処理開始から4分50秒の時点から、例えば5秒間といった所定時間だけ連続して複数の画像データを取得する。そして、制御部8は、個々の画像データの色合いを数値化して脱墨割合値を算出し、得られた脱墨割合値を積算して積算平均値を算出する。 The deinking process is performed for a predetermined deinking process time, for example, 5 minutes. The control unit 8 controls the deinking process based on the detection by the deinking ratio detector 58. That is, for example, a plurality of pieces of image data are acquired continuously for a predetermined time of, for example, 5 seconds from the time of 4 minutes 50 seconds from the start of the deinking process, which is immediately before the end of the deinking process. Then, the control unit 8 calculates the deinking ratio value by digitizing the hue of the individual image data, and calculates the integrated average value by integrating the obtained deinking ratio values.

更に、制御部8は、算出した積算平均値を脱墨割合の閾値と比較し、脱墨割合の積算平均値が閾値以上であったとき、例えば1分間といった所定の延長単位時間だけ脱墨処理を延長することを決定し、実行する。 Furthermore, the control unit 8 compares the calculated integrated average value with the deinking rate threshold value, and when the integrated deinking rate value is equal to or greater than the threshold value, the deinking process is performed for a predetermined extended unit time such as 1 minute. Decide to extend and execute.

このように脱墨部5は、古紙パルプ液の脱墨割合を検出する脱墨割合検出器58を備え、制御部8は、脱墨割合検出器58の検出に基づいて脱墨処理を制御するので、印字率の高い古紙10を用いた場合など予め設定した所定の脱墨処理時間の脱墨処理では、古紙パルプ液が十分に脱墨されない恐れがあるときに、実際の古紙パルプ液の状態を把握し、これに応じて脱墨処理を調整することができる。よって、このようにして脱墨処理が行われた古紙パルプ液をその後抄紙することで得られる再生紙13の白色度を一定の品質に維持可能である。 As described above, the deinking unit 5 includes the deinking ratio detector 58 that detects the deinking ratio of the waste paper pulp liquid, and the control unit 8 controls the deinking process based on the detection of the deinking ratio detector 58. Therefore, in the case of using deinking processing for a predetermined deinking time set in advance, such as when used paper 10 having a high printing rate is used, when there is a possibility that the used paper pulp liquid may not be sufficiently deinked, the actual state of the used paper pulp liquid And the deinking process can be adjusted accordingly. Therefore, it is possible to maintain the whiteness of the recycled paper 13 obtained by papermaking the waste paper pulp liquid that has been deinked in this manner at a constant quality.

また、制御部8は、画像取得部材59が取得した画像データを基に脱墨割合を算出するので、判断の困難な脱墨割合を容易に数値化することができ、得られた脱墨割合値を脱墨処理の制御に利用することが可能である。そして、制御部8は、画像取得部材59が取得した画像データの色合いを数値化し、得られた脱墨割合の数値を、予め設定した脱墨割合に関する閾値と比較するので、判断の困難な脱墨割合をより容易に数値化することができる。
更に、制御部8は、古紙パルプ液の脱墨処理を所定の単位延長時間延長するので、古紙パルプ液の脱墨割合を向上させるよう容易に制御することができる。
Further, since the control unit 8 calculates the deinking ratio based on the image data acquired by the image acquisition member 59, the deinking ratio that is difficult to determine can be easily quantified, and the obtained deinking ratio is obtained. The value can be used to control the deinking process. The control unit 8 digitizes the hue of the image data acquired by the image acquisition member 59 and compares the obtained deinking rate value with a preset threshold value for the deinking rate. The ink ratio can be quantified more easily.
Further, since the deinking process of the used paper pulp liquid is extended by a predetermined unit extension time, the control unit 8 can be easily controlled to improve the deinking ratio of the used paper pulp liquid.

脱墨処理においても、離解処理と同様に、所定の延長単位時間だけ延長した脱墨処理の終了直前に脱墨割合検出器58によって、再度、脱墨割合の画像データを取得し、これを基に脱墨処理をもう1回延長するかどうかを決定する。制御部8は、このような動作を繰り返し行って、古紙パルプ液の脱墨処理が十分に行われるよう制御する。 In the deinking process, similarly to the disaggregation process, image data of the deinking ratio is obtained again by the deinking ratio detector 58 immediately before the end of the deinking process extended by a predetermined extension unit time. Decide whether to extend the deinking process once more. The control unit 8 repeatedly performs such an operation to control the deinking process of the used paper pulp liquid sufficiently.

このように制御部8は、古紙パルプ液の脱墨処理を、所定の延長単位時間の延長を複数回実行可能とするので、1回の脱墨処理の延長では、脱墨割合があまり向上しない場合に脱墨割合を更に向上させることができる。 As described above, the control unit 8 can perform the deinking process of the used paper pulp liquid a plurality of times by extending the predetermined extension unit time, so that the deinking rate is not improved so much by one extension of the deinking process. In this case, the deinking rate can be further improved.

制御部8は、脱墨割合の積算平均値が、脱墨割合の閾値より小さい場合、脱墨処理の終了を決定する。そして、脱墨割合の積算平均値が脱墨割合の閾値以上である場合であっても所定の延長単位時間を一単位とした脱墨処理の延長回数が、例えば3回といった所定の最大延長回数を超えるとき、制御部8は、脱墨処理をそれ以上延長しないこととし、脱墨処理を終了する。脱墨処理により得られた脱墨後の古紙パルプ液は、流出部57より流出され、下流側の抄紙部6へ送られる。 When the integrated average value of the deinking ratio is smaller than the deinking ratio threshold, the control unit 8 determines the end of the deinking process. Even if the cumulative average value of the deinking ratio is equal to or greater than the deinking ratio threshold, the number of deinking processes with a predetermined extension unit time as one unit is, for example, a predetermined maximum number of extension times such as three. When the value exceeds, the control unit 8 decides not to extend the deinking process any more and ends the deinking process. The waste paper pulp liquid after deinking obtained by the deinking process flows out from the outflow part 57 and is sent to the papermaking part 6 on the downstream side.

抄紙部6では、脱墨後の古紙パルプ液がヘッドボックス61へ流入され、流出部615から抄き網621上面へ供給され、均一な繊維の層である湿紙12が形成される。抄き網621から流下した水は、受水部624に受け止められ、白水タンクに収容される。 In the papermaking section 6, the waste paper pulp liquid after deinking is fed into the head box 61 and supplied from the outflow section 615 to the upper surface of the papermaking net 621, and the wet paper 12 which is a uniform fiber layer is formed. The water flowing down from the screen net 621 is received by the water receiving unit 624 and stored in the white water tank.

白水タンク内の白水は、必要により、フィルターによる異物の除去、インク、トナー等の分離、薬剤の添加、中和処理等が施された後、図1に示すように、古紙パルプ製造部3へ循環され、給水部28から攪拌槽32に給水されることで再度利用される。 If necessary, the white water in the white water tank is subjected to removal of foreign matters by a filter, separation of ink, toner, etc., addition of chemicals, neutralization treatment, etc., and then to the waste paper pulp manufacturing unit 3 as shown in FIG. It is circulated and reused by supplying water from the water supply unit 28 to the stirring tank 32.

図5に示す抄き網621上に形成された湿紙12は、抄き網621と吸水ベルト631との当接部分で吸水ベルト631へ転移され、吸水ベルト631により湿紙12に含まれる水分が吸収されて脱水される。湿紙12が脱水手段633の設置箇所に至ると、吸水ベルト631と乾燥ベルト641との間に該湿紙12が挟まれた状態で、一対のプレスローラ634a,634bにより両側より押圧され脱水されるとともに、吸水ベルト631から乾燥ベルト641へ転移される。 The wet paper 12 formed on the papermaking net 621 shown in FIG. 5 is transferred to the water absorbent belt 631 at the contact portion between the papermaking net 621 and the water absorbent belt 631, and the water contained in the wet paper 12 by the water absorbent belt 631. Is absorbed and dehydrated. When the wet paper 12 reaches the installation position of the dewatering means 633, the wet paper 12 is pressed from both sides by the pair of press rollers 634a and 634b and dehydrated with the wet paper 12 being sandwiched between the water absorbing belt 631 and the drying belt 641. In addition, the water absorption belt 631 is transferred to the drying belt 641.

乾燥ベルト641に転移された湿紙12は、カンバス642との間に挟まれ、この状態で乾燥ローラ643に乾燥ベルト641を介して圧接され、乾燥される。乾燥ローラ643の表面温度は、温度センサ649によって検出され、検出結果を基に予め設定した所定温度に維持される。 The wet paper 12 transferred to the drying belt 641 is sandwiched between the canvas 642 and, in this state, is pressed against the drying roller 643 via the drying belt 641 and dried. The surface temperature of the drying roller 643 is detected by the temperature sensor 649, and is maintained at a predetermined temperature set in advance based on the detection result.

乾燥部64を出た仕上げ前の再生紙13は図示しない複数のプレスローラの間に通され、これにより、仕上げ前の再生紙13の平坦度を向上させ、更に、裁断刃で所定のシートサイズに裁断して再生紙13が完成される。裁断刃により裁断された再生紙13の端材は、図1に示すように細断屑貯留部23に戻され、再度再生紙13の製造に利用される。 The recycled paper 13 before finishing exiting the drying unit 64 is passed between a plurality of press rollers (not shown), thereby improving the flatness of the recycled paper 13 before finishing, and further, with a cutting blade, a predetermined sheet size. The recycled paper 13 is completed. The end material of the recycled paper 13 cut by the cutting blade is returned to the shredded waste storage portion 23 as shown in FIG. 1 and is used again for manufacturing the recycled paper 13.

以上より、本第1の実施形態にかかる古紙の離解処理方法は、攪拌羽根341を回転駆動する駆動部342の回転負荷を検出し、検出した回転負荷の値を予め設定した閾値と比較し、前記負荷の値が閾値以上のとき、離解処理を延長するので、攪拌羽根341の駆動部342の回転負荷を閾値と比較するという簡単な方法により、容易に古紙10の離解状態を把握することができ、離解が不十分であると判断される場合離解処理を延長することができる。よって、古紙10を適正に離解処理して古紙パルプ液を製造し、得られた古紙パルプ液を抄紙して得られる再生紙13の品質を向上可能である。 As described above, the used paper disaggregation processing method according to the first embodiment detects the rotational load of the drive unit 342 that rotationally drives the stirring blade 341, and compares the detected rotational load value with a preset threshold value. Since the disaggregation process is extended when the load value is equal to or greater than the threshold value, the disaggregation state of the waste paper 10 can be easily grasped by a simple method of comparing the rotational load of the drive unit 342 of the stirring blade 341 with the threshold value. If the disaggregation is determined to be insufficient, the disaggregation process can be extended. Therefore, it is possible to improve the quality of the recycled paper 13 obtained by appropriately disaggregating the used paper 10 to produce a used paper pulp liquid and making the resulting used paper pulp liquid.

そして、古紙再生処理装置1は、このように負荷検出器37の検出した値に基づいて、離解処理が制御される古紙パルプ製造部3を備えたので、離解処理を不足することなくて適正に行って古紙パルプ液を調製することができ、得られた古紙パルプ液を抄紙部6で抄紙することで、得られる再生紙13の品質を向上可能である。 And since the used paper reproduction | regeneration processing apparatus 1 was equipped with the used paper pulp manufacturing part 3 by which a disaggregation process is controlled based on the value which the load detector 37 detected in this way, it does not run out of a disaggregation process appropriately. The used paper pulp liquid can be prepared by making the paper, and the obtained paper pulp liquid is made by the paper making unit 6 to improve the quality of the recycled paper 13 obtained.

(第2の実施形態)
上記第1の実施形態では、離解処理及び脱墨処理の双方で、最大延長回数が設定され、離解または脱墨の各処理の延長回数が、所定の最大延長回数を超える場合には、更なる離解処理または脱墨処理を行うことなく、後段の工程へ進むよう制御部8は制御した。これに対し、本第2の実施形態では、攪拌槽32または脱墨槽51内に貯留する液体の状態を基に離解処理または脱墨処理を延長するかどうかを判断する。
(Second Embodiment)
In the first embodiment, the maximum number of extension times is set in both the disaggregation process and the deinking process, and if the extension number of each process of the disaggregation or deinking exceeds a predetermined maximum extension number, the further extension The control unit 8 controlled to proceed to the subsequent process without performing the disaggregation process or the deinking process. In contrast, in the second embodiment, it is determined whether to extend the disaggregation process or the deinking process based on the state of the liquid stored in the stirring tank 32 or the deinking tank 51.

まず、離解処理について、攪拌槽32内の古紙10及び水を含む液体は、離解処理を延長することで古紙10の離解が更に進行し、駆動部342の回転負荷が離解処理の延長前と延長後とで変化し、延長後にはこの回転負荷が小さくなると考えられる。この延長前後の回転負荷の変化率を用いることで、攪拌槽32内の液体の状態を把握することが可能となる。離解処理を延長した結果、駆動部342の回転負荷が延長前よりかなり小さくなっており、従って離解処理延長の前後で回転負荷の変化率が大きい場合には、離解処理を延長したために古紙10の離解がかなり進んだと判断できる。一方、離解処理を延長しても、駆動部342に流れる電流が延長前とほとんど変わらず、回転負荷の変化率が小さい場合には、離解処理を延長したことによる効果があまりなかったと判断できる。 First, regarding the disaggregation process, the waste paper 10 and the liquid containing water in the agitation tank 32 are further disaggregated by extending the disaggregation process, and the rotational load of the drive unit 342 is extended before and after the disaggregation process is extended. It changes with after, and it is thought that this rotational load becomes small after extension. By using the rate of change of the rotational load before and after the extension, the state of the liquid in the agitation tank 32 can be grasped. As a result of extending the disaggregation process, the rotational load of the drive unit 342 is considerably smaller than that before the extension, and therefore when the rate of change of the rotational load is large before and after the extension of the disaggregation process, the disaggregation process is extended. It can be judged that disaggregation has advanced considerably. On the other hand, even if the disaggregation process is extended, if the current flowing through the drive unit 342 is almost the same as that before the extension and the change rate of the rotational load is small, it can be determined that there is not much effect by extending the disaggregation process.

よって、離解処理の延長前後の駆動部342の回転負荷の変化率が所定値以上の場合には、更なる離解処理の延長を行い、所定値を下回る場合には、更なる延長を行うことなく離解処理を終了することとする。駆動部342の回転負荷は、離解処理を延長するかどうかを決定する際に算出した積算平均値と、離解処理を延長した後に算出した積算平均値とを用いることができる。 Therefore, when the rate of change of the rotational load of the drive unit 342 before and after the extension of the disaggregation process is equal to or greater than a predetermined value, the disaggregation process is further extended, and when it is below the predetermined value, no further extension is performed. The disaggregation process will be terminated. As the rotational load of the drive unit 342, the integrated average value calculated when deciding whether to extend the disaggregation process and the integrated average value calculated after extending the disaggregation process can be used.

脱墨処理についても同様に、脱墨処理の延長前の積算平均値と、延長後の積算平均値との変化率が、予め設定した所定値以上である場合には、脱墨処理を更に延長することとし、所定値より小さい場合には脱墨処理を延長することなく終了することとする。 Similarly, for the deinking process, if the rate of change between the integrated average value before the deinking process is extended and the integrated average value after the extension is equal to or greater than the preset value, the deinking process is further extended. If it is smaller than the predetermined value, the deinking process is terminated without being extended.

これより、離解又は脱墨の各処理を、実際の古紙10や古紙パルプ液の状態に即して実行することができ、得られる再生紙を一定の品質に維持することができる。 Thereby, each process of disaggregation or deinking can be performed according to the actual state of the used paper 10 or the used paper pulp liquid, and the obtained recycled paper can be maintained at a constant quality.

尚、上記実施形態では、制御部8は、負荷検出器37が検出した値を予め設定した閾値と比較したが、これに限定されず、例えば、負荷検出器が検出した値に応じて攪拌羽根の回転速度を調整するよう制御してもよく、負荷検出器が検出した値に応じて離解処理時間の長さを調整してもよい。また、負荷検出器37の検出した負荷の値が閾値以上のとき、古紙の離解処理を所定の延長単位時間だけ延長するよう制御したが、例えば、負荷の値と閾値との差を算出し、この差の値に応じて延長時間を設定するなどしてもよい。 In the above embodiment, the control unit 8 compares the value detected by the load detector 37 with a preset threshold value. However, the present invention is not limited to this. For example, according to the value detected by the load detector, the stirring blade It may be controlled to adjust the rotation speed of the slab, and the length of the disaggregation processing time may be adjusted according to the value detected by the load detector. Further, when the load value detected by the load detector 37 is equal to or greater than the threshold value, the waste paper disaggregation process is controlled to be extended by a predetermined extension unit time. For example, the difference between the load value and the threshold value is calculated, The extension time may be set according to the difference value.

また、制御部8は、離解処理について、所定の延長単位時間の延長を複数回実行可能とするよう制御したが、1回のみの延長が可能としてもよい。また、制御部8は、離解処理の延長回数、または離解処理の延長前及び延長後の回転負荷の変化率に基づいて、更なる離解処理の延長を行うかどうかを判断したが、他の方法例えば、検出した負荷の値の積算平均値が閾値より小さくなるまで延長を繰り返すこととしてもよい。また、離解処理の延長回数と、離解処理の延長前後の回転負荷の変化率との双方を組み合わせて更なる延長を実行するかどうかを判断してもよい。 In addition, the control unit 8 controls the disaggregation process so that a predetermined extension unit time can be extended a plurality of times, but may be extended only once. Further, the control unit 8 determines whether or not to further extend the disaggregation process based on the number of times the disaggregation process is extended or the change rate of the rotational load before and after the extension of the disaggregation process. For example, the extension may be repeated until the integrated average value of the detected load values becomes smaller than the threshold value. Further, it may be determined whether or not to perform further extension by combining both the number of extension times of the disaggregation process and the change rate of the rotational load before and after the extension of the disaggregation process.

また、負荷検出器37は、駆動部342としての駆動モータに流れる電流値を検出する電流検出器38により構成したが、負荷検出器により回転負荷のトルク値を検出してもよく、駆動部の消費電力や駆動モータに流れる電圧値を検出することとしてもよい。また、積算平均値を閾値と比較したが、検出した値を積算することなく閾値と比較してもよい。 In addition, the load detector 37 is configured by the current detector 38 that detects the current value flowing through the drive motor as the drive unit 342. However, the load detector 37 may detect the torque value of the rotational load. It is good also as detecting the power consumption and the voltage value which flows into a drive motor. Further, although the integrated average value is compared with the threshold value, the detected value may be compared with the threshold value without integrating.

また、古紙再生処理装置1は、脱墨部5を設けたが、脱墨部5を設けないこととし、古紙パルプ製造部3で製造した古紙パルプ液を脱墨することなく抄紙部6へ送り、抄紙することとしてもよい。また、脱墨部5は脱墨割合検出器58を備えず、これに応じた脱墨処理を行わないこととしてもよい。 In addition, the used paper recycling processor 1 includes the deinking unit 5, but does not include the deinking unit 5, and sends the used paper pulp liquid produced by the used paper pulp manufacturing unit 3 to the paper making unit 6 without deinking. It is also possible to make paper. Further, the deinking unit 5 may not include the deinking ratio detector 58 and may not perform the deinking process corresponding thereto.

P 古紙の離解処理装置
1 古紙再生処理装置
8 制御部
10 古紙
13 再生紙
28 給水部
32 攪拌槽
38 負荷検出器
39 電流検出器
341 攪拌羽根
342 駆動部
P Waste Paper Disaggregation Processing Device 1 Waste Paper Recycling Processing Device 8 Control Unit 10 Waste Paper 13 Recycled Paper 28 Water Supply Unit 32 Stirring Tank 38 Load Detector 39 Current Detector 341 Agitation Blade 342 Drive Unit

Claims (5)

古紙を離解して古紙パルプ液を製造し、得られた古紙パルプ液を抄紙して再生紙を製造する古紙再生処理装置に用いる古紙の離解処理装置であって、
古紙を給水部から供給された水とともに攪拌し、離解処理する攪拌羽根を備えた攪拌槽と、
前記攪拌羽根を駆動する駆動部と、
前記駆動部の回転負荷を検出する負荷検出器と、
前記負荷検出器の検出した値に基づいて、古紙の離解処理を制御する制御部とを備え
前記制御部は、負荷検出器が検出した値を予め設定した閾値と比較し、前記負荷の検出値が閾値以上のとき、古紙の離解処理を所定の延長単位時間だけ延長するよう制御し、
前記離解処理の延長の前後で駆動部の回転負荷の変化率が所定値以上の場合には、更なる離解処理の延長を行い、所定値を下回る場合には、更なる延長を行うことなく離解処理を終了する古紙の離解処理装置。
A waste paper disaggregation treatment device used in a waste paper recycling treatment apparatus for producing waste paper pulp liquid by disaggregating waste paper and making paper paper obtained to produce recycled paper,
Stirring waste paper with water supplied from the water supply unit, and a stirring tank equipped with stirring blades for disaggregation processing,
A drive unit for driving the stirring blade;
A load detector for detecting the rotational load of the drive unit;
Based on the value detected by the load detector, a control unit that controls the disaggregation processing of waste paper ,
The control unit compares the value detected by the load detector with a preset threshold value, and when the detected value of the load is equal to or greater than the threshold value, controls to disaggregate waste paper for a predetermined extension unit time,
If the rate of change of the rotational load of the drive unit is greater than or equal to a predetermined value before and after the extension of the disaggregation process, the disaggregation process is further extended, and if it is below the predetermined value, the disaggregation is performed without further extension. Waste paper disaggregation processing device that finishes processing.
制御部は、所定の延長単位時間の延長を複数回実行可能とするよう制御する請求項に記載の古紙の離解処理装置。 The used paper disaggregation processing apparatus according to claim 1 , wherein the control unit performs control so that extension of a predetermined extension unit time can be executed a plurality of times. 負荷検出器は、駆動部としての駆動モータに流れる電流値を検出する電流検出器により構成される請求項1または請求項2に記載の古紙の離解処理装置。 3. The used paper disaggregation processing apparatus according to claim 1 or 2 , wherein the load detector includes a current detector that detects a current value flowing through a drive motor as a drive unit. 請求項1乃至請求項のいずれか一項に記載の古紙の離解処理装置を備えた古紙再生処理装置。 A used paper recycling apparatus comprising the used paper disaggregation processing apparatus according to any one of claims 1 to 3 . 古紙を給水部から供給された水とともに攪拌羽根を用いて攪拌槽内で攪拌し、離解処理する古紙の離解処理方法であって、
攪拌羽根を回転駆動する駆動部の回転負荷を検出し、
検出した回転負荷の値を予め設定した閾値と比較し、前記負荷の値が閾値以上のとき、離解処理を延長し、
前記離解処理の延長の前後で駆動部の回転負荷の変化率が所定値以上の場合には、更なる離解処理の延長を行い、所定値を下回る場合には、更なる延長を行うことなく離解処理を終了する古紙の離解処理方法。
A used paper disaggregation method that stirs waste paper in a stirring tank using a stirring blade together with water supplied from a water supply unit,
Detect the rotational load of the drive unit that rotates the stirring blade,
The detected rotational load value is compared with a preset threshold value, and when the load value is equal to or greater than the threshold value, the disaggregation process is extended ,
If the rate of change of the rotational load of the drive unit is greater than or equal to a predetermined value before and after the extension of the disaggregation process, the disaggregation process is further extended, and if it is below the predetermined value, the disaggregation is performed without further extension. A method for disassembling waste paper that ends processing.
JP2012071684A 2012-03-27 2012-03-27 Waste paper disaggregation processing apparatus, waste paper recycling processing apparatus, and waste paper disaggregation processing method Expired - Fee Related JP5870336B2 (en)

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