Search for dissertations about: "fibre flocculation"

Showing result 1 - 5 of 11 swedish dissertations containing the words fibre flocculation.

2. 1. On fibre suspension flow modelling : mechancal fibre flocculation and fibre orientation

   Author : Marko Hyensjö; Anders Dahlkild; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering physics; Teknisk fysik; Engineering physics; Teknisk fysik;

   Abstract : .... READ MORE

4. 2. Fluid dynamics and flow structures of wood fibres suspended in gas flows

   Author : Olof Melander; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; two-fluid model; fibres; flocculation; multiphase flow; flow regimes; particle transport; fibre suspensions; Particle Image Velocimetry; Computational Fluid Dynamics; lift force; concentration measurement;

   Abstract : The flow of wood fibres suspended in gas plays a major role in the MDF (Medium Density Fibreboard) production process. Development of machinery in this industry has traditionally been based on experience. Only recently has the use of numerical methods such as CFD (Computational Fluid Dynamics) become an important part of the development process. READ MORE

5. 3. Fibre suspension flocculation under simulated forming conditions

   Author : Huawei Yan; KTH; []
   Keywords : ;

   Abstract : A flow loop system for study of fibre flocculation insuspensions has been developed. The system is designed tosimulate the flow conditions in a paper machine headbox. It isequipped with a radial distributor feeding a step diffuser pipepackage, after which the flow is contracted in a 2-D nozzle. READ MORE

6. 4. Fibre flocculation during twin-wire roll forming

   Author : Roger Bergström; KTH; []
   Keywords : ;

   Abstract : At the division of Paper Technology a forming unitconsisting of headbox, forming roll unit and reservoir systemfor suspension recirculation has been constructed, with themain purpose to experimentally study the paper forming event byvisually following the fibre flow phenomena in the formingzone.The effect of various running parameters upon the pressuredistribution, which is in correlation to the flow phenomenaoccuring during forming, has been studied with a flush mountedpressure sensor. READ MORE

7. 5. Adsorption kinetics of cationic polyacrylamides on cellulose fibres and its influence on fibre flocculation

   Author : Daniel Solberg; KTH; []
   Keywords : Adsorption; bridging; cationic polymers; cellulose fibres; electrosteric stabilisation flocculation; ;

   Abstract : The adsorption of cationic polyacrylamide (C-PAM) and silicananoparticles onto a model surface of silicon oxide wascompared with the adsorption of C-PAM to fibres and theirinfluence on flocculation of a fibre suspension. An increase inionic strength affects the polyelectrolyte adsorption indifferent ways for these two systems. READ MORE