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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
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Editorial: Professional Networking in the Nonwovens and Technical Textiles Sector
Editorial: Professional Networking in the Nonwovens and Technical Textiles Sector
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Magazine articles
Generlized stead-state model for chlorine dioxide brightning
Generlized stead-state model for chlorine dioxide brightning of hardwood kraft pulps, TAPPI JOURNAL May 2017
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Impact of dissolved matter in the oxygen delignifcation stag
Impact of dissolved matter in the oxygen delignifcation stage, TAPPI JOURNAL May 2017
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New automated method for macrocontaminant analysis
New automated method for macrocontaminant analysis: Industrial applications, TAPPI JOURNAL November 2017
Journal articles
Magazine articles
Innovative technology for making paper from poor fibers
Innovative technology for making improved paper from the poorest fibers, TAPPI JOURNAL November 2017
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Improved deinking and stickies removal
Improved deinking and stickies removal, TAPPI JOURNAL November 2017
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Effect of conductivity on paper and board machine performanc
Effect of conductivity on paper and board machine performance— a review and new experiences, TAPPI JOURNAL October 2017
Journal articles
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Techno-economic analysis of ECF bleaching and TCF bleaching
Techno-economic analysis of ECF bleaching and TCF bleaching for a bleached eucalyptus kraft pulp mill, TAPPI JOURNAL October 2017
Journal articles
Magazine articles
Editorial: In praise of challenging papers
Editorial: In praise of challenging papers, and those who review them, TAPPI JOURNAL August 2015