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Improved energy efficiency in thermomechanical pulping through co-optimixation of intensity by segment design and wood softening by sulfonation
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
Valmet AB.
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2014 (English)In: International mechanical pulping conference IMPC 2014, 2014Conference paper, Published paper (Other academic)
Abstract [en]

A mill scale trial was performed where chips were mechanically pretreated and impregnated with sodium sulfite (<7.2 g/kg). Pretreated chips were refined in two parallel double disc refiners (RGP68DD) using two different conditions: Turbine™ segment at higher production rate (higher intensity) and Low Shive™ segment at normal production rate (lower intensity). By combining the Turbine segments with chip pretreatment using a sodium sulphite charge of 3.6 g/kg it was possible to reduce the specific energy consumption by 15%, while maintaining pulp properties, compared with the lower intensity refining without pretreatment.

Place, publisher, year, edition, pages
2014.
Keyword [en]
Energy efficiency; Energy utilization; Refining; Sodium; Turbines
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-26285Scopus ID: 2-s2.0-84923972592OAI: oai:DiVA.org:miun-26285DiVA: diva2:873020
Conference
29th International Mechanical Pulping Conference, IMPC 2014; Helsinki; Finland; 3 June 2014 through 5 June 2014; Code 109275
Available from: 2015-11-22 Created: 2015-11-22 Last updated: 2016-09-22Bibliographically approved

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Nelsson, ErikSandberg, ChristerA. Engberg, BirgittaEngstrand, Per
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