Black Liquor Falling Film Evaporation: Computational Model and Pilot Experiments

The focus of this work is to improve our understanding of the black liquor evaporator fouling process. Theinvestigation method is two pronged, consisting of the development of a computational model paired withexperiments conducted in a pilot evaporator. Experiments for black liquor at solids up to 45% dry solids wereconducted and used to validate the computational model. It was found that for fixed Reynolds number, loweringpump frequency induces waves closer to the inlet. And, for fixed pumping frequency, increasing the Reynoldsnumber has the effect of inducing waves closer to the inlet. The numerical model reproduces the complex wavesstructures present in black liquor flow. The model and pilot plant are to be used to investigate the effect of relevantparameters for the hydrodynamics, heat transfer, and soluble scale fouling of black liquor, which is of specificconcern to the pulping industry.

Doro, Emmanuel (author)
Aidun, Cyrus (author)
Gourdon, Mathias,1980Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)k00goma (author)
Vamling, Lennart,1954Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)lennartv (author)
Chalmers tekniska högskola (creator_code:org_t)

In:Proceedings of International Chemical Recovery Conference, Tampere,Finland, June 8 – 13 2014, s. 389-401

By the author/editor: Howell, Aaron; Doro, Emmanuel; Aidun, Cyrus; Gourdon, Mathias ...; Vamling, Lennart ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Energy Engineeri ...

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