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2014 | 35 | 4 | 409-420

Article title

A New Device for Characterisation of the Drainage Kinetics of Fibrous Suspensions Under Gravity


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Gravity dewatering of fibrous suspension is one of basic technological operations in paper production process. Although there are numerous methods to determine dewatering of such suspensions, none of them can measure undisturbed flow of removed water. In the paper the idea and design of a new apparatus for the determination of drainage rate of fibrous suspensions is presented. The apparatus differs from other known devices by minimisation of filtrate flow resistance in the outlet part of the equipment. In the second part of the paper measurements of the drainage rate have been presented. The flow resistance of the fluid through the bottom wire screen in the device was determined. The calculated flow resistance will be used in the developed model of dynamic drainage of fibrous suspensions, which will be discussed in our following paper (Przybysz et al., 2014).









Physical description


1 - 12 - 2014
17 - 12 - 2014
24 - 7 - 2014
4 - 7 - 2014
8 - 9 - 2013


  • Lodz University of Technology, Institute of Papermaking and Printing, Wolczanska 229, 90-924 Lodz, Poland
  • Lodz University of Technology, Faculty of Process and Environmental Engineering, Wolczanska 213, 90-924 Lodz, Poland
  • Czech Technical University, Faculty of Mechanical Engineering, Technicka 4, 166 07 Prague, Czech Republic


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  • Przybysz K., 2007. Klasyfikacja wody zawartej w papierniczych masach włóknistych. Cz. II. Woda sklarowana i sedymentacyjna. Przegląd Papierniczy, 63, 2, 113.
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  • Przybysz K., Sokołow W., 2001. Uwagi o budowie i osobliwych właściwościach wody. Cz. I. Właściwości wody i hydrolowe teorie jej struktury. Przegląd Papierniczy, 57, 12, 743.
  • Roschy A., Fischer S., Kleemann S., 2003. Vergleich moderner Wet-End Methoden zur Bestimmung von Entwässerung und Retention im Labormaßstab. Wochenblatt für Papierfabrication, 130, 18, 1187-1196.
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