External rewetting after suction box dewatering
2008 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, Vol. 23, no 4, 409-414 p.Article in journal (Refereed) Published
A method has been developed to enable external rewetting to be measured during suction box dewatering. In a laboratory suction box, webs were instantaneously separated from the forming fabric at defined times, both during and after the suction pulse. External rewetting was measured for webs of mechanical (50, 100 g/m(2)) and chemical pulp (100, 200 g/m(2)). Suction pulses with a pressure drop of 10 and 40 kPa, and duration of 50 to 1000 ms were used. A considerable external rewetting was observed occurring primarily directly after the end of the suction pulse. Under the process conditions investigated, rewetting accounted for a dry content decrease of between 3 and 6%.
Place, publisher, year, edition, pages
2008. Vol. 23, no 4, 409-414 p.
Suction box, Vacuum, Water removal, Compression, Displacement, Rewetting, Forming fabric, Laboratory equipment
Paper, Pulp and Fiber Technology
IdentifiersURN: urn:nbn:se:kth:diva-8558DOI: 10.3183/NPPRJ-2008-23-04-p409-414ISI: 000262102700009OAI: oai:DiVA.org:kth-8558DiVA: diva2:13914
QC 20100924. Uppdaterad från submitted till published (20100924).2008-06-022008-06-022010-09-24Bibliographically approved