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Paper Recycling System and Paper Recycling Process (19) TZZ Z_T (11) EP 2 664 708 A1 (12) EUROPEAN PATENT APPLICATION published in accordance with Art. 153(4) EPC (43) Date of publication: (51) Int Cl.: 20.11.2013 Bulletin 2013/47 D21B 1/08 (2006.01) (21) Application number: 11855915.2 (86) International application number: PCT/JP2011/007124 (22) Date of filing: 20.12.2011 (87) International publication number: WO 2012/095928 (19.07.2012 Gazette 2012/29) (84) Designated Contracting States: (72) Inventors: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB • YAMAGAMI, Toshiaki GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO Suwa-shi PL PT RO RS SE SI SK SM TR Nagano 392-8502 (JP) • IKUMA, Ken (30) Priority: 12.01.2011 JP 2011004113 Suwa-shi 14.01.2011 JP 2011005573 Nagano 392-8502 (JP) 14.01.2011 JP 2011005574 (74) Representative: HOFFMANN EITLE (71) Applicant: Seiko Epson Corporation Patent- und Rechtsanwälte Shinjuku-ku Arabellastrasse 4 Tokyo 163-0811 (JP) 81925 München (DE) (54) PAPER RECYCLING SYSTEM AND PAPER RECYCLING PROCESS (57) To provide a paper recycling device capable of defibrator 30, a cyclone 50 for air classifying and deinking recycling paper of increased whiteness level that can be the defibrated material transported by the first transport widely used for applications other than paper for news- pipe 40, a second transport pipe 60 for transporting the papers, the paper recycling device of the present inven- defibrated material that was deinked by the cyclone 50, tion has a dry type defibrator 30 for crushing and defi- and a paper forming machine 100 for forming paper with brating paper, a first transport pipe 40 for transporting the defibrated material transported by the second trans- defibrated material that was defibrated by the dry type port pipe 60. EP 2 664 708 A1 Printed by Jouve, 75001 PARIS (FR) 1 EP 2 664 708 A1 2 Description problem that the whiteness level was low, and its appli- cability was limited to paper for printing newspapers or Technical Field the like. [0001] The present invention relates to a paper recy- 5 Means for Solving the Problems cling device and paper recycling method based on paper recycling technology using a dry method that to the extent [0007] To address problems such as those noted possible does not use water. above, the present invention is characterized in that the paper recycling device of the present invention has a dry Background Art 10 type defibrator unit for crushing paper and defibrating it, a first transport unit for conveying defibrated material de- [0002] In the past, with recycling of old paper dis- fibrated by the dry type defibrator unit, a classifier unit charged from offices or the like, a so-called wet method that does deinking by doing air flow classification of the was used by which old paper was put into water, defi- defibrated material transported by the first transport unit, brated using mainly mechanical action, and remade. This 15 a second transport unit that transports the defibrated ma- kind of wet method old paper recycling requires a large terial deinked by the classifier unit, and a paper forming volume of water, so the processing scale has to be large unit that forms paper with the defibrated material trans- to make it inexpensive. Because of that, collecting a large ported by the second transport unit. volume of old paper is essential, and in addition to a great [0008] Also, with the paper recycling device of the deal of effort being required for preparation and mainte- 20 present invention, the flow velocity of the air flow of the nance of the water processing equipment, there was also classifier unit’s connecting part with the first transport unit the problem that a large volume of energy is used for the is higher than the flow velocity of the air flow of the dry drying process. type defibrator unit’s connecting part with the first trans- [0003] However, since old paper on which confidential port unit. items are noted is also discharged from offices, from the 25 [0009] Also, with the paper recycling device of the perspective of maintaining confidentiality as well, there present invention, the classifier unit is a cyclone. is a desire to process old paper within one’s own office. [0010] Also, with the paper recycling device of the However, since the volume of old paper discharged from present invention, the paper forming unit has a dispersion a small office is small, it is difficult to ensure the volume member for dispersing in the air the defibrated material necessary for a large scale process like that described 30 transported by the second transport unit, a suction mem- above. Also, it is not realistic to install equipment for large ber for suctioning the dispersed defibrated material, and scale processing like that noted above within an office. a mesh belt for transporting the defibrated material suc- In light of that, to do paper recycling, up to now, several tioned by the suction member. dry method paper recycling technologies that to the ex- [0011] Also, with the paper recycling device of the tent possible do not use water have been proposed. 35 present invention, the mesh belt transports the formed [0004] For example, disclosed with the invention noted paper and also has a water sprayer for spraying water in Patent Document 1 (Unexamined Patent Publication on the formed paper. No. 1-148888) is use of secondary fiber sources as [0012] Also, the paper recycling device of the present sheets for printing newspaper by defibrating them using invention hasa heater roller for heating the paper sprayed a dry method, and by making the printed ink into tiny ink 40 by water using the water sprayer. spots that are difficult to detect. [0013] Also, the paper recycling device of the present invention has a third transport unit for transporting clas- Prior Art Documents sified material classified from the defibrated material by the classifier unit, and a suction unit that suctions the Patent Documents 45 classified material transported by the third transport unit. [0014] Also, the paper recycling method of the present [0005] Patent Document 1: Unexamined Patent Pub- invention is characterized by defibrating paper by dry lication No. 1-148888 type crushing, transporting the defibrated material using the first transport unit, doing air flow classification and Disclosure of the Invention 50 deinking of the defibrated material transported by the first transport unit, transporting by the second transport unit Problems the Invention Is Intended to Solve the defibrated material deinked by the classifying proc- ess, and forming paper using the defibrated material [0006] However, the paper that is recycled using the transported by the second transport unit. technology noted in Patent Document 1 has not gone 55 [0015] Also, the paper recycling device of the present through the so-called deinking process that removes invention is characterized by having a dry type defibrator components of ink grains and the like contained in the unit for doing dry type crushing and defibrating of paper, fiber obtained by defibrating old paper, so there was the a first transport unit for transporting using air flow the 2 3 EP 2 664 708 A1 4 defibrated material defibrated by the dry type defibrator of the paper formed by the paper forming unit, and the unit, an adjustment unit for adjusting the air flow of the control unit controls the volume of paper supplied to the first transport unit, a classifier unit for doing air flow clas- dry type defibrator unit based on the detection results of sification and deinking of the defibrated material trans- the detector unit. ported by the first transport unit, a second transport unit 5 [0025] Also, with the paper recycling device of the for transporting the defibrated material deinked by the present invention, the flow velocity of the air flow of the classifier unit, and a paper forming unit for forming paper classifier unit’s connecting part with the first transport unit from the defibrated material transported by the second is greater than the flow velocity of the air flow of the dry transport unit. type defibrator unit’s connecting part with the first trans- [0016] Also, with the paper recycling device of the10 port unit. present invention, the first transport unit has a transport [0026] Also, with the paper recycling device of the pipe for moving defibrated material, and the adjustment present invention, the classifier unit is a cyclone. unit adjusts the cross section surface area of the transport [0027] Also, with the paper recycling device of the pipe. present invention, the paper forming unit has a dispersion [0017] Also, with the paper recycling device of the15 member that disperses defibrated material, a suction present invention, the low velocity of the air flow of the member that suctions the dispersed defibrated material, classifier unit’s connecting part with the first transport unit and a mesh belt that transports the defibrated material is greater than the flow velocity of the air flow of the dry suctioned by the suction member. type defibrator unit’s connecting part with the first trans- [0028] Also, with the paper recycling device of the port unit. 20 present invention, the mesh belt transports the formed [0018] Also, with the paper recycling device of the paper, and also has a water sprayer that sprays water present invention, the classifier unit is a cyclone. on the paper transported by the mesh belt. [0019] Also, with the paper recycling device of the [0029] Also, the paper recycling device of the present present invention, thepaper formingunit has a dispersion invention has a heater roller that heats the paper sprayed member for dispersing defibrated material, a suction25 with water by the water sprayer.
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