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Thermal pretreatment of black liquor: A conceptual design
University of Borås, Faculty of Textiles, Engineering and Business. (Förbränning och termisk behandling)ORCID iD: 0000-0003-0037-3555
2017 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

The recovery boiler is a vital part of the chemical recovery cycle and should produce a smelt of the cooking chemicals together with steam at high temperature and pressure. Part of these chemicals are found in the gases, either as small fume particles or as gases and this could cause problems such as deposits, corrosion and material losses. A thermal pre-treatment method is proposed to minimize the sodium and sulfur in the upper region of the boiler. Sulfur is released at temperatures below 600 °C in reducing atmospheres but most of this is recaptured by the black liquor droplets. The sodium losses are mostly by fume formation during char burning but a part could also be by physical ejection which would release sulfur as well.

Place, publisher, year, edition, pages
2017.
National Category
Other Chemical Engineering
Identifiers
URN: urn:nbn:se:hb:diva-12580ISBN: 978-1-77289-003-7 (electronic)OAI: oai:DiVA.org:hb-12580DiVA: diva2:1142102
Conference
International Chemical Recovery Conference, Halifax, May 24-26, 2017
Funder
Swedish Energy Agency
Available from: 2017-09-18 Created: 2017-09-18 Last updated: 2017-09-19Bibliographically approved

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