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Converting a kraft pulp mill into a multi-product biorefinery – Part 2: Economical aspects

Valeria Lundberg (Institutionen för energi och miljö, Värmeteknik och maskinlära) ; Elin Svensson (Institutionen för energi och miljö, Värmeteknik och maskinlära) ; Erik Axelsson ; Maryam Mahmoudkhani (Institutionen för energi och miljö, Värmeteknik och maskinlära)
Nordic Pulp & Paper Research Journal (0283-2631). Vol. 28 (2013), 4, p. 489-497.
[Artikel, refereegranskad vetenskaplig]

Conversion into dissolving pulp production is an interesting pathway for kraft pulp mills experiencing decreasing marginal revenues. In this two-part study, the technical and economic consequences of the conversion have been investigated. In Part 1, the energy aspects of converting into dissolving pulp production were studied, as well as the consequences on the by-product and pulp production capacity of the converted mill. In this paper, the economic performance of different process configurations is evaluated. Our results indicate that the price of dissolving pulp and the pulp production capacity of the mill have the largest influence on the overall profitability. Accordingly, in order to achieve high profitability, it is necessary to debottleneck the mill’s capacity for pulp production. Debottlenecking the recovery boiler by upgrading capacity and increasing power generation requires large investments and downtime costs but can be profitable if the price of electricity is high. Debottlenecking by means of lignin separation can nevertheless be more interesting if lignin is valued high or if investment capital is limited. Regardless of the way the recovery boiler is debottlenecked, a higher level of heat integration is always more attractive than a lower, simpler level of heat integration.

Nyckelord: Biorefinery, Debottlenecking, Dissolving pulp, Economic assessment, Heat integration, Kraft pulp mill



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Denna post skapades 2014-01-07. Senast ändrad 2014-01-17.
CPL Pubid: 191706

 

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Institutioner (Chalmers)

Institutionen för energi och miljö, Värmeteknik och maskinlära (2005-2014)

Ämnesområden

Energi
Hållbar utveckling
Termisk energiteknik
Kemiska processer

Chalmers infrastruktur

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Chemical and Biochemical Biorefineries in Kraft Pulp Mills – Process Integration and Economics for Three Concepts