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    PROCESS CONTROL IN BURNING AND SLAKING OF LIME AND CAUSTICIZING
    71.
    发明申请
    PROCESS CONTROL IN BURNING AND SLAKING OF LIME AND CAUSTICIZING 审中-公开
    燃烧和焚烧和处理渣滓的过程控制

    公开(公告)号：WO1987004738A1

    公开(公告)日：1987-08-13

    申请号：PCT/SE1987000044

    申请日：1987-02-02

    Applicant: STFI ,  ANDERSSON, Birgitta, Susanne ,  ZETHRAEUS, Malin, Christina ,  HERNGREN, Torbjörn ,  GUSTAFSSON, Jan-Erik, Vilhelm

    Inventor： STFI

    IPC: D21C11/04

    CPC classification number: C04B2/02 ,  D21C11/0064 ,  Y02P40/44 ,  Y10S162/10 ,  Y10S423/03

    Abstract: A method of controlling one or more processes in connection with burning, slaking and causticizing lime, said processes comprising lime burning e.g. in a lime kiln (10), washing and filtering of lime sludge e.g. on a lime sludge filter (19) and a causticizing process, as well as supervising said processes. According to the invention at least one of the mechanical properties of the burnt lime, e.g. modulus of elasticity or hardness, is measured directly or indirectly. This property or quantity being a measure of both the reburning efficiency in the kiln and the reactivity of the lime in slaking is then used for adjusting the operating conditions in the kiln, in the lime sludge filter and/or in the causticizing process. A device for carrying out the method for control of processes in connection with burning, slaking and causticizing of lime, said processes comprising lime burning in a lime kiln (10), filtering of lime sludge on a lime sludge filter (19) and a causticizing process, comprises according to the invention a measuring apparatus (12) for direct or indirect measurement of at least one of the mechanical properties of the burnt lime. An adjusting unit (16) utilizes, optionally via a process computer (14), the output signal of the measuring apparatus (12) for adjustment of the operating conditions in the lime kiln, of the lime sludge filter and/or in the causticizing process.

    Abstract translation: 控制一个或多个与燃烧，去除和苛化石灰相关的方法的方法，所述方法包括石灰燃烧。 在石灰窑（10）中，洗涤和过滤石灰泥，例如 在石灰污泥过滤器（19）和苛化过程中，以及监督所述方法。 根据本发明，煅烧石灰的机械性质中的至少一种，例如， 弹性模量或硬度，直接或间接测量。 作为测量窑炉中的再燃烧效率和消除石灰的反应性的这种性质或数量然后用于调节窑炉，石灰污泥过滤器和/或苛化过程中的操作条件。 一种用于执行与石灰的燃烧，去除和苛化相关的方法的控制方法的装置，所述方法包括在石灰窑（10）中烧成石灰，在石灰污泥过滤器（19）上过滤石灰污泥和苛化 方法包括根据本发明的用于直接或间接测量煅烧石灰的机械性能的测量装置（12）。 调节单元（16）可选地经由过程计算机（14）利用测量装置（12）的输出信号，用于调节石灰窑，石灰污泥过滤器和/或苛化过程中的操作条件 。

    METHOD OF DETERMINING AN ILLUMINATED SURFACE
    72.
    发明公开
    METHOD OF DETERMINING AN ILLUMINATED SURFACE 审中-公开
    方法确定照射面

    公开(公告)号：EP1155284A1

    公开(公告)日：2001-11-21

    申请号：EP00903057.8

    申请日：2000-01-10

    Applicant: STFI

    Inventor： JOHANSSON, Per-Ake ,  HANSSON, Peter

    IPC: G01B11/24 ,  G01B11/30

    CPC classification number: G01B11/306

    Abstract: Method of determining a surface illuminated by incident light. First the intensity (I1(x,y)) of light reflected from the surface is recorded in a first image of the surface. After this, the intensity (I2(x,y)) of light reflected from the surface is recorded in a second image of the surface, taken at a different angle of illumination. Only the diffusely reflected light is recorded. The difference between the recorded intensities of the first and the second images is determined to obtain a representation that emphasises variations in gradient of the surface. This representation is further processed by signal-adapted integration to a topographic description, that is, a height function of the surface.

    DETERMINATION OF GLOSS QUALITY
    73.
    发明公开
    DETERMINATION OF GLOSS QUALITY 失效
    光泽质量的测定

    公开(公告)号：EP1012576A1

    公开(公告)日：2000-06-28

    申请号：EP97906357.5

    申请日：1997-01-29

    Applicant: STFI

    Inventor： JOHANSSON, Per- ke ,  LINDSTRAND, Mikael

    IPC: G01N21/57

    CPC classification number: G01N21/57

    Abstract: A method and apparatus for obtaining a basis on which the gloss quality of a sample surface of a sample, such as a paper sheet, can be determined by illuminating the sample surface and registering the intensity of the reflected light. With the intention of enabling several different types of gloss variation investigations to be made on a sample surface essentially in accordance with known principles of gloss facet approximation, it is proposed, among other things, that the sample surface (80) is exposed in an image registering area (44) by controlled rotary movement of the sample surface through the image registering area or by controlled rotary movement of the image registering area over the sample surface, wherein the intensity of the light reflected from a plurality of spatially well defined part-surfaces of the sample surface is registered several times during this rotary movement while, at the same time, determining the positions of the part-surfaces in the image registering area (44), and in turn the viewing angle, so as to establish what we here define as an image volume which is representative of the registered light intensity as a function of the position of the part-surfaces within the sample surface and of the respective viewing angle.

    Abstract translation: 一种用于获得如下基础的方法和设备：通过照射样本表面并记录反射光的强度，可以确定样本（例如纸张）的样本表面的光泽度质量。 为了基本上根据光泽小平面近似的已知原理在样本表面上进行几种不同类型的光泽变化研究，除其他之外，提出了样本表面（80）暴露在图像中 通过所述样本表面的受控旋转运动通过所述图像配准区域或通过所述图像配准区域在所述样本表面上的受控旋转运动来记录区域（44），其中从多个空间明确限定的部分表面 在该旋转运动期间多次登记样本表面的位置，同时确定图像配准区域（44）中的部分表面的位置并进而确定视角，以便确定我们在此处 根据样品表面内部分表面的位置定义为表示配准光强度的图像体积，o f各视角。

    METHOD OF REDUCING THE ENERGY CONSUMPTION AT THE REFINING OF CELLULOSE-CONTAINING MATERIAL
    77.
    发明公开
    METHOD OF REDUCING THE ENERGY CONSUMPTION AT THE REFINING OF CELLULOSE-CONTAINING MATERIAL 失效
    方法以减少能源消耗在RAFFINAGE纤维素材料。

    公开(公告)号：EP0302075A1

    公开(公告)日：1989-02-08

    申请号：EP87902828.0

    申请日：1987-04-15

    Applicant: STFI

    Inventor： ENGSTRAND, Per, Ossian ,  HTUN, Myat, Thoung ,  HAMMAR, Lars-Ake ,  PETTERSSON, Rune, Lennart

    IPC: D21B1 ,  D21D1

    CPC classification number: D21B1/16 ,  D21D1/20

    Abstract: Le procédé de réduction de la consommation d'énergie lors du raffinage/battage d'un matériau contenant de la cellulose consiste à ajouter un alcali au matériau pour neutraliser les groupes acides liés à la paroi fibreuse. Selon l'invention, la valeur du pH dans la suspension de pulpe est mesurée à la sortie du raffineur, l'alcali est ajouté en une quantité dépendant de la valeur du pH mesuré pour la neutralisation sans excès dans la zone de battage ou immédiatement avant que le matériau n'entre dans ce dernier, en une quantité comprise entre 0,05 et 9 kg/tonne, de préférence entre 0,5 et 5 kg/tonne, plus particulièrement entre 1 et 4 kg/tonne, le calcul étant effectué en kilo de NaOH par tonne de pulpe.

    METHOD FOR THE MANUFACTURING OF MICROFIBRILLATED CELLULOSE
    79.
    发明公开
    METHOD FOR THE MANUFACTURING OF MICROFIBRILLATED CELLULOSE 有权
    用于生产微纤化纤维素

    公开(公告)号：EP1984561A1

    公开(公告)日：2008-10-29

    申请号：EP07709298.9

    申请日：2007-01-31

    Applicant: STFI-Packforsk AB

    Inventor： LINDSTRÖM, Tom ,  ANKERFORS, Mikael ,  HENRIKSSON, Gunnar

    IPC: D21C9/00 ,  D21H11/20

    CPC classification number: D21C5/005 ,  D21H11/18

    Abstract: The present invention provides a method for treatment of chemical pulp for the manufacturing of microfibrillated cellulose comprising the following steps: a) providing a hemicellulose containing pulp, b) refining said pulp in at least one step and treating said pulp with one or more wood degrading enzymes at a relatively low enzyme dosage, and c) homogenizing said pulp thus providing s aid microfibrillated cellulose. According to a second aspect of the invention a microfibrillated cellulose obtainable by the method according to the first aspect is provided . According to a third aspect of the invention, use of said microfibrillated cellulose according to the second aspect in food products, paper products, composite materials, coatings or in rheology modifiers (e.g. drilling muds) is provided .

    DEWATERING APPARATUS
    80.
    发明授权
    DEWATERING APPARATUS 有权
    排水设备

    公开(公告)号：EP1853760B1

    公开(公告)日：2008-10-08

    申请号：EP06716944.1

    申请日：2006-02-27

    Applicant: STFI-Packforsk AB

    Inventor： NORMAN, Bo ,  HERMANSSON, Lennart

    IPC: D21F1/36 ,  D21F9/00

    CPC classification number: D21F1/483 ,  D21F9/003

    Abstract: Dewatering arrangement adapted to use in a twin-wire dewatering section of a paper machine, comprising a rotating forming roll, a head box for supplying stock arranged before the forming roll, a closed loop first wire adapted to, be partly wrapped around the forming roll to a separation line where its contact with the forming roll ceases, and to receive the stock from the head box on its surface not facing the forming roll, a closed loop second wire adapted to be partly wrapped around the forming roll on top of the first wire thereby pressing the stock between itself and the first wire, a first blade, substantially parallel with the forming roll, is arranged to support the lower side of the wire after the separation line of the forming roll and is arranged such that the tip of the blade is directed against the wire transporting direction, The distance from the separation line to the blade is less than 100 mm. By supporting the wire close to the forming roll movement of the first wire is suppressed, thus reducing unwanted effects like sheet damages.

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