Well functioning wet-end starch : A prerequisite for capacity increase at Smurfit Kappa Piteå
Cationic starch is a common wet-end additive in the paper industry which is mainly used to enhance retention and dry strength of the finished paper. At Smurfit Kappa Piteå, cationic starch is by far the most costly chemical used in the paper mill. It is therefore important that the added starch work...
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Luleå tekniska universitet, Industriell miljö- och processteknik
2017
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ftluleatu:oai:DiVA.org:ltu-66004 2023-05-15T18:00:00+02:00 Well functioning wet-end starch : A prerequisite for capacity increase at Smurfit Kappa Piteå Risberg, Emil 2017 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66004 eng eng Luleå tekniska universitet, Industriell miljö- och processteknik http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66004 info:eu-repo/semantics/openAccess Chemical Engineering Kemiteknik Student thesis info:eu-repo/semantics/bachelorThesis text 2017 ftluleatu 2022-10-25T20:48:37Z Cationic starch is a common wet-end additive in the paper industry which is mainly used to enhance retention and dry strength of the finished paper. At Smurfit Kappa Piteå, cationic starch is by far the most costly chemical used in the paper mill. It is therefore important that the added starch works efficiently, as poor adsorption of starch causes dissolved starch to circulate in the systems. This could cause slime deposits affecting the runnability of the paper machine and other equipment. In the planned production expansion at Smurfit Kappa Piteå during the nearest future, the demand on well-functioning wet-end starch will increase. Through mappings and laboratory studies, the purpose of the present project was to determine the efficiency of the current starch used in the paper mill and to identify any potential for improvements. A method to measure starch content in paper, pulp and white water was implemented to enable the above-mentioned activities to be carried out. As a tool for quality control of cooked starch, a microscopic method was implemented. The method was proven to be a simple and quick tool to verify whether the cooked starch was completely solubilized or not. Mappings at both paper machines were performed where adsorbed and dissolved starch content were analyzed according to the above-mentioned test method. The results showed the highest level of adsorption in the top ply system at PM2 while the base ply systems at both paper machines displayed lower levels. A significant difference of conductivity in pulps as well as furnishes is likely to explain the difference in adsorption efficiency between the systems. High levels of dissolved starch were observed in the top ply system at PM1 despite any use of cationic starch in this system. This is explained by dissolved starch in the white water that originates from other stock preparation systems is introduced via the shared dilution of pulp. A laboratory study was conducted to compare the adsorption of starches with different degree of substitution ... Bachelor Thesis Piteå Luleå University of Technology Publications (DiVA) |
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Luleå University of Technology Publications (DiVA) |
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English |
topic |
Chemical Engineering Kemiteknik |
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Chemical Engineering Kemiteknik Risberg, Emil Well functioning wet-end starch : A prerequisite for capacity increase at Smurfit Kappa Piteå |
topic_facet |
Chemical Engineering Kemiteknik |
description |
Cationic starch is a common wet-end additive in the paper industry which is mainly used to enhance retention and dry strength of the finished paper. At Smurfit Kappa Piteå, cationic starch is by far the most costly chemical used in the paper mill. It is therefore important that the added starch works efficiently, as poor adsorption of starch causes dissolved starch to circulate in the systems. This could cause slime deposits affecting the runnability of the paper machine and other equipment. In the planned production expansion at Smurfit Kappa Piteå during the nearest future, the demand on well-functioning wet-end starch will increase. Through mappings and laboratory studies, the purpose of the present project was to determine the efficiency of the current starch used in the paper mill and to identify any potential for improvements. A method to measure starch content in paper, pulp and white water was implemented to enable the above-mentioned activities to be carried out. As a tool for quality control of cooked starch, a microscopic method was implemented. The method was proven to be a simple and quick tool to verify whether the cooked starch was completely solubilized or not. Mappings at both paper machines were performed where adsorbed and dissolved starch content were analyzed according to the above-mentioned test method. The results showed the highest level of adsorption in the top ply system at PM2 while the base ply systems at both paper machines displayed lower levels. A significant difference of conductivity in pulps as well as furnishes is likely to explain the difference in adsorption efficiency between the systems. High levels of dissolved starch were observed in the top ply system at PM1 despite any use of cationic starch in this system. This is explained by dissolved starch in the white water that originates from other stock preparation systems is introduced via the shared dilution of pulp. A laboratory study was conducted to compare the adsorption of starches with different degree of substitution ... |
format |
Bachelor Thesis |
author |
Risberg, Emil |
author_facet |
Risberg, Emil |
author_sort |
Risberg, Emil |
title |
Well functioning wet-end starch : A prerequisite for capacity increase at Smurfit Kappa Piteå |
title_short |
Well functioning wet-end starch : A prerequisite for capacity increase at Smurfit Kappa Piteå |
title_full |
Well functioning wet-end starch : A prerequisite for capacity increase at Smurfit Kappa Piteå |
title_fullStr |
Well functioning wet-end starch : A prerequisite for capacity increase at Smurfit Kappa Piteå |
title_full_unstemmed |
Well functioning wet-end starch : A prerequisite for capacity increase at Smurfit Kappa Piteå |
title_sort |
well functioning wet-end starch : a prerequisite for capacity increase at smurfit kappa piteå |
publisher |
Luleå tekniska universitet, Industriell miljö- och processteknik |
publishDate |
2017 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66004 |
genre |
Piteå |
genre_facet |
Piteå |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66004 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766168912138862592 |