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Journal articles
Magazine articles
Open Access
Exergy and sensibility analysis of each individual effect in a kraft multiple effect evaporator, TAPPI Journal October 2019

ABSTRACT: The multiple effect evaporator (MEE) is an energy intensive step in the kraft pulping process. The exergetic analysis can be useful for locating irreversibilities in the process and pointing out which equipment is less efficient, and it could also be the object of optimization studies. In the present work, each evaporator of a real kraft system has been individually described using mass balance and thermodynamics principles (the first and the second laws). Real data from a kraft MEE were collected from a Brazilian plant and were used for the estimation of heat transfer coefficients in a nonlinear optimization problem, as well as for the validation of the model. An exergetic analysis was made for each effect individually, which resulted in effects 1A and 1B being the least efficient, and therefore having the greatest potential for improvement. A sensibility analysis was also performed, showing that steam temperature and liquor input flow rate are sensible parameters.

Journal articles
Open Access
Data for better maintenance plans and investments policy, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (354KB)

Data for better maintenance plans and investments policy, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (354KB)

Journal articles
Open Access
Chemical treatment in mechanical pulping, part 5: sulfite pretreatment, TAPPI JOURNAL, August 2003, Vol. 2(8) (179KB)

Chemical treatment in mechanical pulping, part 5: sulfite pretreatment, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (179KB)

Journal articles
Open Access
Bleaching study of kenaf mechanical pulps, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (167KB)

Bleaching study of kenaf mechanical pulps, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (167KB)

Journal articles
Open Access
Modifying boiler operation to reduce primary air port cracking in a recovery boiler, TAPPI JOURNAL, December 2003 (732KB)

Modifying boiler operation to reduce primary air port cracking in a recovery boiler, Solutions! & TAPPI JOURNAL, December 2003 (732KB)

Journal articles
Open Access
Paper properties and swelling properties of ozone-based ECF bleached softwood kraft pulps, TAPPI JOURNAL, FEB 2003 (92KB)

Paper properties and swelling properties of ozone-based ECF bleached softwood kraft pulps, Solutions! & TAPPI JOURNAL, FEB 2003 (92KB)

Journal articles
Open Access
Recovery boiler furnace as concentrated NCG incinerator, Solutions! & TAPPI JOURNAL, February 2003, Vol. 2(2) (29KB)

Recovery boiler furnace as concentrated NCG incinerator, Solutions! & TAPPI JOURNAL, February 2003, Vol. 2(2) (29KB)

Journal articles
Open Access
Internet based, interactive simulation: the concept and an evaporator example, TAPPI JOURNAL, February 2003, Vol. 2(2) (147KB)

Internet based, interactive simulation: the concept and an evaporator example, Solutions! & TAPPI JOURNAL, February 2003, Vol. 2(2) (147KB)

Journal articles
Open Access
Economic benefits achieved from an odor reduction project, Solutions! & TAPPI JOURNAL, January 2003 (531KB)

Economic benefits achieved from an odor reduction project, Solutions! & TAPPI JOURNAL, January 2003 (531KB)

Journal articles
Open Access
FT-Raman spectroscopy for direct measurement of lignin concentrations in kraft pulps, TAPPI JOURNAL, January 2003 (561KB)

FT-Raman spectroscopy for direct measurement of lignin concentrations in kraft pulps, Solutions! & TAPPI JOURNAL, January 2003 (561KB)

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