Through-drying of tissue at high intensities - An experimental study

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Abstract

Experimental data for through-drying of tissue at intensities comparable to industrial conditions arc presented. The study covers three basis weights, 20, 30 and 40 g/m(2), dried at drying air temperatures of 100, 150 and 200 degrees C. Unlike most experimental data on through-drying in the literature, the experiments in this study were performed under conditions of constant pressure drop across the sample, which is the way the process is operated in industry. The study covers a total of eighteen combinations of the variables basis weight, drying air temperature and pressure drop. Pressure drops in the range 1.0-5.2 kPa were studied depending on basis weight and the desired through-flow rate. The results from the 242 experiments show drying 2 times ranging from 0.5 to 3.5 s, at average drying rates ranging between 120 and 3 70 kg/m(2)h. The experiments were performed using the laboratory equipment of Metso Paper at the companys research facility in Biddeford, Maine, USA.

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Subject classification (UKÄ) – MANDATORY

  • Chemical Engineering

Keywords

  • temperature, pressure gradient, tissue, through drying, basis weight
Original languageEnglish
Pages (from-to)1-8
JournalJournal of Pulp and Paper Science
Volume33
Issue number1
Publication statusPublished - 2007
Publication categoryResearch
Peer-reviewedYes