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Metod för provtagning av svartlut och analys av såpa i svartlut
Linköping University, Department of Physics, Chemistry and Biology.
2019 (Swedish)Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesisAlternative title
Method for sampling black liquor and analysis of soap in black liquor (English)
Abstract [en]

In paper pulp production, many details can be optimized. For optimal separation of soap from black liquor, it is important to know the amount of soap in the black liquor. A project to produce a method for sampling black liquor and a method for measuring how much soap is present in black liquor by centrifugation was done at Södra Cell Mönsterås. Through centrifugation faster analysis can be done.

It took a long time to develop a satisfactory sampling method, but with the help of careful checking of temperature and time, a method was achieved that worked at temperatures between 90 and 100°C, which were the temperatures that were most frequently found, but are higher than the optimum temperature for soap separation. The black liquor turned out to be inhomogeneous, so the project failed to obtain an optimal analysis method within the framework of this project. In the experiment, the centrifuge settings were optimized to 87°C, 2500 rpm and 10 minutes

Further attempts could provide more optimal settings for the centrifuge and a substitute for black liquor could make a validation of the centrifuge possible.

Abstract [sv]

Pappersmassaproduktion är komplex, och en rad faktorer kan optimeras. En viktig parameter vid såpavskiljning är innehållet såpa i svartlut eftersom en värdefull produkt, tallolja utvinns av såpa. Projektet syftar till att ta fram en metod för provtagning av svartlut och en metod för att mäta halten såpa i svartluten genom centrifugering. Genom centrifugering kan snabbare analyser göras.  Arbetet har utförts på Södra Cell Mönsterås.

Arbetet att utveckla en tillfredsställande provtagningsmetod var komplicerad, men med hjälp av noggrann koll på temperatur och tid uppnåddes en metod som fungerade vid temperaturer mellan 90 och 100°C, vilket var de temperaturer som oftast fanns, men som är högre än optimal temperatur för såpavskiljning. Svartluten visade sig vara inhomogen, därför lyckades det inte att få fram en optimal analysmetod inom ramen av detta projekt. I försöket optimerades centrifugens inställningar till 87°C, 2500 rpm (varv per minut) och 10 minuter.

Vidare försök skulle kunna ge mer optimala inställningar för centrifugen genom den utvecklade prov, och ett substitut för svartlut skulle kunne göra en validering av centrifugen möjlig.

Place, publisher, year, edition, pages
2019. , p. 49
Keywords [en]
Black liquor, centrifuge, sampling, sulphur soap, tall oil
Keywords [sv]
Centrifugering, provtagning, svartlut, såpa, tallolja
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-157584ISRN: LITH-IFM-G-EX— 19/3679 --SEOAI: oai:DiVA.org:liu-157584DiVA, id: diva2:1325188
External cooperation
Södra Cell Mönsterås
Subject / course
Chemical Engineering
Presentation
2019-06-05, Schrödinger (E324), Linköping, 15:00 (Swedish)
Supervisors
Examiners
Available from: 2019-06-17 Created: 2019-06-14 Last updated: 2019-06-17Bibliographically approved

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CiteExportLink to record
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