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    CONTINUOUS DIGESTER AND FEEDING SYSTEM
    2.
    发明授权
    CONTINUOUS DIGESTER AND FEEDING SYSTEM 有权

    公开(公告)号：EP3224408B1

    公开(公告)日：2018-11-21

    申请号：EP15813169.8

    申请日：2015-11-23

    申请人： International Paper Company

    发明人： MC CANTY, Kevin M.

    IPC分类号： D21C7/00 ,  D21C3/00 ,  D21C7/06 ,  D21C7/10 ,  D21C7/14 ,  D21C11/00

    CPC分类号： D21C7/06 ,  D21C3/00 ,  D21C7/00 ,  D21C7/10 ,  D21C7/14 ,  D21C11/0021

    摘要： One embodiment provides an apparatus for cooking lignocellulosic material, comprising a pressurizable, inclined top separator including a sluicing liquor inlet for receiving a sluicing mixture comprising impregnated lignocellulosic material and sluicing liquor, a hot black liquor inlet, an excess liquor outlet, and an impregnated lignocellulosic material outlet; a continuous digester vessel including an impregnated lignocellulosic material inlet in communication with the impregnated lignocellulosic material outlet, and a warm black liquor outlet; and a black liquor circulation and heating loop including a warm black liquor inlet in communication with said warm black liquor outlet, a heater for heating warm black liquor to produce hot black liquor, and a hot black liquor outlet in communication with said hot black liquor inlet. Methods of making and using the apparatus are also provided.

    METHOD FOR OPERATING A TWO VESSEL DIGESTER SYSTEM
    3.
    发明公开
    METHOD FOR OPERATING A TWO VESSEL DIGESTER SYSTEM 审中-公开

    公开(公告)号：EP3215672A4

    公开(公告)日：2018-05-02

    申请号：EP15857624

    申请日：2015-11-04

    申请人： VALMET OY

    发明人： WILGOTSON FREDRIK ,  HÄGGLUND MAGNUS ,  OLSSON KRISTER

    IPC分类号： D21C3/24 ,  D21C3/02 ,  D21C7/14 ,  D21C9/02 ,  D21C11/00

    CPC分类号： D21C3/02 ,  D21C3/24 ,  D21C7/14 ,  D21C9/02 ,  D21C11/00

    摘要： The invention relates to an improved two vessel cooking system, wherein the first vessel is an atmospheric impregnation vessel and the second vessel is a pressurized digester, where hot black liquor is finally flashed off inside the impregnation vessel for steaming the cellulosic material and providing the impregnation liquor. According to the inventive method is an additional cleaner wash liquor heated and added to final cook zone in digester, while displacing a corresponding amount of hot black liquor before the final cook zone, and the heat value in the hot black liquor is recovered first in transport circulation before being used as source for flashing off steam used to steam the comminuted cellulosic material inside the impregnation liquor and final use as impregnation liquor. The invention results in a cooking process with high yield and improved delignification in final cooking phases and reduced COD content in the produced pulp without increasing steam consumption.

    VERFAHREN ZUR GEWINNUNG VON CELLULOSE
    4.
    发明公开
    VERFAHREN ZUR GEWINNUNG VON CELLULOSE 有权

    公开(公告)号：EP3024974A1

    公开(公告)日：2016-06-01

    申请号：EP14744103.4

    申请日：2014-07-25

    申请人： Fülling, Rainer

    发明人： SCHLABACH, Heiko ,  FÜLLING, Rainer

    IPC分类号： D21C1/10 ,  C08H8/00 ,  D21C7/00 ,  D21C7/14 ,  D21C11/00 ,  D21C11/04 ,  C08L97/02 ,  C02F9/00 ,  D21C5/02 ,  C12P7/10

    CPC分类号： D21C3/02 ,  C08B1/00 ,  C08H8/00 ,  C08L1/02 ,  C08L97/02 ,  D21C1/10 ,  D21C3/224 ,  D21C5/02 ,  D21C7/00 ,  D21C7/14 ,  D21C9/08 ,  D21C11/00 ,  D21C11/04 ,  Y02E50/16 ,  Y02W30/648

    摘要： The present invention relates to a process for obtaining cellulose or a mixture containing at least cellulose and at least lignocellulose from at least one substrate that is at least to some extent amenable to fermentation comprising at least the steps of (1) to (3) and optionally (4), namely conversion of the substrate via addition of at least one inorganic base into an aqueous mixture with pH ≥ 8.5 (step 1), ultrasound treatment of the aqueous mixture obtained after step (1) (step 2), separation of the aqueous mixture obtained after step (2) into a liquid aqueous phase and a disperse mixture containing cellulose or a mixture containing at least cellulose and at least lignocellulose (step 3) and optionally purification of the disperse mixture obtained after step (3) containing cellulose or of the mixure containing at least cellulose and at least lignocellulose (step 4), where step (1) and step (2) of the process respectively are carried out at a temperature

    摘要翻译： 本发明涉及一种获得纤维素或至少含有纤维素和至少一种木质纤维素的混合物的方法，该至少一种底物至少在一定程度上适于发酵，其包括至少步骤（1）至（3）和 任选地（4），即通过将至少一种无机碱加入到具有pH≥8.5（步骤1）的水性混合物中的底物的转化，超声处理在步骤（1）（步骤2）之后获得的含水混合物，分离 步骤（2）中获得的含水混合物加入到液体水相中，以及含有至少纤维素和至少木质纤维素（步骤3）的纤维素或混合物的分散混合物，并任选地纯化在步骤（3）之后获得的分散混合物， 纤维素或至少含有纤维素和至少木质纤维素的混合物（步骤4），其中该方法的步骤（1）和步骤（2）分别在<100℃的温度下进行，其中u 步骤（2）中的超声处理在一个或多个处理阶段进行，其中处理阶段的瓷砖持续时间在0.2至60秒的范围内，并且每个处理阶段以超声波频率在14至22范围内进行 千赫。

    SCREEN DEVICE FOR A DIGESTER FOR PRODUCING PULP
    8.
    发明授权
    SCREEN DEVICE FOR A DIGESTER FOR PRODUCING PULP 有权
    屏幕装置PULP炊具

    公开(公告)号：EP1769118B1

    公开(公告)日：2012-04-11

    申请号：EP05744411.9

    申请日：2005-05-25

    申请人： Metso Paper, Inc.

    发明人： ISOLA, Antti ,  ROSENQVIST, Matti

    IPC分类号： D21C7/00 ,  D21C7/14

    CPC分类号： D21C7/14

    摘要： The invention relates to a central screen element being located substantially parallel with the vertical axis of a pulp digester. In the vertical direction, the screen element comprises at least one zone including one screen segment for removing a liquid stream from the digester and at least one outlet for introducing a liquid stream to the digester. The zones may be adjacent or separated and by means of these, liquid streams may be independently removed and introduced, as required by the properties and the stage of the cooking process. A screen element according to the invention may be used in both continuous and batch digesters.

    PROCESS FOR CONTINUOUSLY COOKING CHEMICAL CELLULOSE PULP
    10.
    发明公开
    PROCESS FOR CONTINUOUSLY COOKING CHEMICAL CELLULOSE PULP 有权
    法的连续蒸煮纸浆

    公开(公告)号：EP1454009A1

    公开(公告)日：2004-09-08

    申请号：EP02792125.3

    申请日：2002-12-04

    申请人： KVAERNER PULPING AB

    发明人： GUSTAVSSON, Catrin ,  LINDSTRÖM, Mikael ,  OLSSON, Krister ,  SNEKKENES, Vidar

    IPC分类号： D21C3/24 ,  D21C7/14 ,  D21C3/22

    CPC分类号： D21C3/24 ,  D21C7/14

    摘要： Process for continuously cooking chemical pulp in a digester system consisting of at least one vessel for impregnating and cooking comprising an inlet into which a mixture of chips and process liquid is fed. The chips are impregnated at a predetermined impregnation temperature Timp, and cooked at a predetermined cooking temperature Tcook, after which dissolved pulp is fed out at the outlet of the digester system. Process liquid which is continually extracted is retained outside the digester system during a dwell time, t, of at least 30 min, without any heating above 140°, and thereafter returned to the digester system to a position which is substantially at the same level as the extraction, or downstream thereof, and thereby constitute part of the process liquid in the subsequent treatment zone. The process results in improved tear strength, beatability, bleachability and reduced colour reversion, and increased yield across the digester.