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    A method for treating process waters by cavitation
    1.
    发明授权
    A method for treating process waters by cavitation 有权

    公开(公告)号：EP2400054B1

    公开(公告)日：2018-09-12

    申请号：EP11180968.7

    申请日：2006-02-09

    申请人： Nippon Paper Industries Co., Ltd.

    发明人： GOTO, Shisei ,  TSUJI, Hiromichi ,  WATANABE, Keigo ,  IIMORI, Takeshi

    IPC分类号： D21C5/02 ,  D21B1/32 ,  D21F1/66

    CPC分类号： D21D1/00 ,  D21B1/325 ,  D21C5/02 ,  D21D1/02 ,  D21F1/0009 ,  D21H11/14 ,  Y02W30/646 ,  Y02W30/648

    摘要： The first invention aims to provide a method for preparing stiffer bulky pulp at a freeness level comparable to that obtained by mechanical treatments to improve the bulkiness of product paper by searching for a method capable of adjusting freeness while suppressing damage to pulp fibers and internal fibrillation in a process for producing pulp. The second invention aims to strip contaminants deposited on pulp fibers and/or inorganic particles to reduce adhesion of the contaminants and decrease microorganisms in a treatment of process water containing long pulp fiber fractions used in a process for producing pulp and paper, thereby clarifying process water and thus preparing high-quality pulp and paper. According to the first invention, cavitation is generated in a pulp suspension preferably by a liquid jet and the resulting fine bubbles are introduced into the pulp suspension to adjust the pulp suspension to a desired freeness by means of the impact force induced by collapse of the fine bubbles in a process for producing pulp. According to the second invention, process water containing 50% by weight or less, based on total solids, of long pulp fiber fractions used in a process for producing pulp and/or paper is treated by cavitation generated by a liquid jet and then returned to the process for producing pulp and/or paper and reused.

    METHOD FOR BEATING OF PULP AND PROCESS FOR PRODUCING PULP AND PAPER
    4.
    发明授权
    METHOD FOR BEATING OF PULP AND PROCESS FOR PRODUCING PULP AND PAPER 有权
    方法磨纸浆和过程的生产纸浆和纸张

    公开(公告)号：EP1860232B1

    公开(公告)日：2012-07-11

    申请号：EP06713420.5

    申请日：2006-02-09

    申请人： NIPPON PAPER INDUSTRIES CO., LTD.

    发明人： GOTO, Shisei c/o Nippon Paper Industries Co., Ltd. ,  TSUJI, Hiromichi c/o Nippon Paper Industries Co., Ltd. ,  WATANABE, Keigo c/o Nippon Paper Industries Co., Ltd ,  IIMORI, Takeshi c/o Nippon Paper Industries Co., Ltd.

    IPC分类号： D21D1/00

    CPC分类号： D21D1/00 ,  D21B1/325 ,  D21C5/02 ,  D21D1/02 ,  D21F1/0009 ,  D21H11/14 ,  Y02W30/646 ,  Y02W30/648

    摘要： In a first invention, there is provided a method for preventing damage to pulp fibers and internal fibrillation in a pulp production process to regulate the freeness, whereby, on the same freeness level as mechanical treatment, more stiff and bulky pulp can be produced and the bulky level of paper as the product can be improved. In a second invention, in the treatment of process water containing long fibers of a pulp used in the production process of pulp and paper, contaminants adhered onto pulp fibers and/or inorganic particles are separated, and the stickiness of the contaminants is lowered, and microorganisms are reduced, whereby the process water is clarified, resulting in the production of high-quality pulp and paper. In the first invention, in the production process of pulp, cavitation is allowed to occur in a pulp suspension preferably by liquid jet flow. Fine bubbles produced by cavitation are introduced into the pulp suspension, and the pulp is regulated to a desired freeness by taking advantage of impact power created upon the collapse of the fine bubbles. In the second invention, process water in which the content of long fibers in pulp used in the production process of pulp and/or paper is not more than 50% by weight based on the total solid content, is treated by cavitation generated by liquid jet flow and is then returned to the production process of pulp and/or paper for reutilization.

    Procédé de désencrage de la pâte à papier provenant de papiers recyclés
    10.
    发明公开
    Procédé de désencrage de la pâte à papier provenant de papiers recyclés 有权
    Verfahren zum deinken einer aus Altpapier hergewonnenen Fasersuspension

    公开(公告)号：EP0924336A1

    公开(公告)日：1999-06-23

    申请号：EP98403138.5

    申请日：1998-12-14

    申请人： E & M LAMORT

    发明人： Serres, Alain

    IPC分类号： D21C5/02 ,  D21B1/32

    CPC分类号： D21B1/325 ,  B03D1/1475 ,  B03D1/24 ,  D21C5/025 ,  Y02W30/646 ,  Y02W30/648

    摘要： Le procédé de désencrage de la pâte à papier provenant de la mise en pulpe avec de l'eau de vieux papiers de qualités diverses selon lequel on fait traverser au moins une fois le flux (E 2 S 2 ; E 3 S 3 ) de pâte par un courant de bulles d'air (C) est caractérisé par le fait qu'on envoie un contre-courant d'eau (E 1 ) dans le courant de bulles d'air de désencrage après que lesdites bulles aient traversé la pâte et se soient chargées de particules d'encre de sorte que le contre-courant libère les particules (fibres, fines ou charges) entraînées par ces bulles de désencrage et les entraîne avec lui.

    摘要翻译： 为了从纸浆中分离油墨颗粒，由各种用于再循环的废纸纸组成，纸浆流（E2，S2; E3，S3）经受至少一个气泡电流（C）。 水（E1）的逆流在气泡（C）的流动中，以在墨水颗粒通过纸浆并携带墨水颗粒之后脱离墨水颗粒。 逆流水分离携带的颗粒物质和任何纤维，并在水流中携带。