Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Process modelling based on data from an evaporation and a CTMP process: Analysis of energy efficiency and process variability
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Chemical Sciences.
2018 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The manufacture of pulp and paper is an energy intensive process configured of several unit processes that shape a network of flows of wood chips, chemical pulp, mechanical pulp, paperboard, steam and other important components. Improved energy efficiency supports sustainability of the process and the products. With the purpose of monitoring and controlling, information from multiple process and quality variables is continuously collected in the process data system. This data may be of time-varying nature and the variability might potentially span from seasonal to time-wise shorter variations and there are in some cases a need for predicting certain properties.

By applying models based on process data there is a potential to increase the knowledge of the process characteristics, investigate the applicability of predictive models and identify optimization opportunities. Based on data from an evaporation and a CTMP plant, process models have been developed with the aim of improving the energy efficiency and studying process variability.  

Place, publisher, year, edition, pages
Karlstad: Karlstads universitet, 2018. , p. 56
Series
Karlstad University Studies, ISSN 1403-8099 ; 2018:7
Keyword [en]
CTMP, process modelling, evaporation, energy efficiency
National Category
Chemical Process Engineering
Research subject
Environmental and Energy Systems
Identifiers
URN: urn:nbn:se:kau:diva-65785ISBN: 978-91-7063-836-7 (print)ISBN: 978-91-7063-931-9 (electronic)OAI: oai:DiVA.org:kau-65785DiVA, id: diva2:1179715
Presentation
2018-03-21, Fryxellsalen, Karlstad, 10:15 (Swedish)
Opponent
Supervisors
Available from: 2018-04-12 Created: 2018-02-02 Last updated: 2018-04-12Bibliographically approved
List of papers
1. Potential energy improvements in a multiple-effect evaporation system: Case studies of heat recovery
Open this publication in new window or tab >>Potential energy improvements in a multiple-effect evaporation system: Case studies of heat recovery
2016 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 31, no 4, p. 583-591Article in journal (Refereed) Published
Abstract [en]

The primary objective of this study was to quantify the amount of excess energy that is present in the evaporation system of an integrated pulp and paper-board mill and to analyze a number of energy recovery cases. These focus on improving the energy efficiency in the evaporation plant and are mainly based on the process data of performance tests from the full-scale production site. A computer script was developed in order to analyze the process streams and can be used to construct the Grand Composite Curve (GCC) of the evaporation system. In addition, the study identified seasonal variations in the potential excess of energy (higher in warmer weather and lower, or even non-existent, in colder) and suggestions are made as to how this energy may be used in a thermodynamically optimal way. In the case studies, the thermodynamically optimal method of recovering heat involved a combination of sensible heat and flash evaporation, indicating the maximum reduction in steam consumption. For the case of only utilizing sensible heat outside the evaporator system to pre-heat one of the liquor flows, the results indicated a lower reduction in steam but also a lower capital cost.

Place, publisher, year, edition, pages
Mittuniversitetet, 2016
Keyword
Black liquor, Evaporation, Multiple effect evaporator, Energy efficiency, Heat recovery, Kraft mill, Paper mill
National Category
Chemical Engineering
Research subject
Chemical Engineering
Identifiers
urn:nbn:se:kau:diva-62602 (URN)000389905200006 ()
Available from: 2017-08-09 Created: 2017-08-09 Last updated: 2018-02-02Bibliographically approved
2. Trial measurements in a CTMP-process to perform time-series analysis of refining conditions and estimated pulp properties
Open this publication in new window or tab >>Trial measurements in a CTMP-process to perform time-series analysis of refining conditions and estimated pulp properties
2017 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kau:diva-65786 (URN)
Conference
10th Fundamental Mechanical Pulp Research Seminar
Available from: 2018-01-29 Created: 2018-01-29 Last updated: 2018-02-02Bibliographically approved
3. Time series analysis of refining conditions and estimated pulp properties in a CTMP-process with aspect of potential dynamic modelling applicability
Open this publication in new window or tab >>Time series analysis of refining conditions and estimated pulp properties in a CTMP-process with aspect of potential dynamic modelling applicability
(English)Manuscript (preprint) (Other academic)
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kau:diva-65734 (URN)
Available from: 2018-01-29 Created: 2018-01-29 Last updated: 2018-02-02

Open Access in DiVA

Coverpage(644 kB)0 downloads
File information
File name IMAGE01.jpgFile size 644 kBChecksum SHA-512
4c04938dbe4a486f70013256e285a8585c9210540fed5f7422f5b4e4dc18009064e25508396f58db7dd7d391f4363341d89c981462f0b19c34c6f709f9e5cf89
Type imageMimetype image/jpeg

Authority records BETA

Ekbåge, Daniel

Search in DiVA

By author/editor
Ekbåge, Daniel
By organisation
Department of Engineering and Chemical Sciences
Chemical Process Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 74 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf