Experimental studies on dewatering during roll forming of paper
2005 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, Vol. 20, no 2, 205-211 p.Article in journal (Refereed) Published
Pressure and wire position measurements have been performed in an experimental facility, the KTH-Former, which intends to model the roll-forming zone of a paper machine. The measured pressure distributions in the forming zone are shown to have more complex patterns than the simple model p=T/R, which normally is referred to as the nominal pressure. It is also shown that an increase in wire tension has a similar effect as a decrease in flow-rate on the shape of the pressure distribution. This is a consequence of that the flow to a large extent is governed by the relation between the dynamic pressure and the nominal pressure. For the case of partial dewatering the suction peak that appears at the roll-wire separation point has a strong influence on the pressure distribution upstream. Finally, it is shown that the drainage has a stabilizing effect on the dewatering pressure.
Place, publisher, year, edition, pages
2005. Vol. 20, no 2, 205-211 p.
papermaking, forming, roll dewatering, experimental measurements
IdentifiersURN: urn:nbn:se:kth:diva-14888DOI: 10.3183/NPPRJ-2005-20-02-p205-211ISI: 000230271800012ScopusID: 2-s2.0-20744447195OAI: oai:DiVA.org:kth-14888DiVA: diva2:332929
QC 20100525. Tidigare titel: Experimental studies on partial dewatering during roll forming of paper2010-08-052010-08-052010-10-21Bibliographically approved