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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
Industrial Lo-Solids Pulp Digester Simulation by the Purdue Model, TAPPI JOURNAL April 2009
Industrial Lo-Solids Pulp Digester Simulation by the Purdue Model, TAPPI JOURNAL April 2009
Journal articles
Comparison of Various Hardwood Kraft Pulp Pre-Bleaching Techniques, TAPPI JOURNAL April 2009
Comparison of Various Hardwood Kraft Pulp Pre-Bleaching Techniques, TAPPI JOURNAL April 2009
Journal articles
Modified Egyptian Talc as Internal and Surface Treatments for Papermaking, TAPPI JOURNAL April 2009
Modified Egyptian Talc as Internal and Surface Treatments for Papermaking, TAPPI JOURNAL April 2009
Journal articles
The Relationship Between Tack and Linting in Offset Printing of Newsprint Grades, TAPPI JOURNAL August 2009
The Relationship Between Tack and Linting in Offset Printing of Newsprint Grades, TAPPI JOURNAL August 2009
Journal articles
Optimization of ECF Bleaching of Kraft Pulp: II. Effects of Acid Prehydrolysis on Hardwood Pulp Bleachability, TAPPI JOURNAL August 2009
Optimization of ECF Bleaching of Kraft Pulp: II. Effects of Acid Prehydrolysis on Hardwood Pulp Bleachability, TAPPI JOURNAL August 2009
Journal articles
Aggregation of Colloidal Material in Recycling Process Water, TAPPI JOURNAL August 2009
Aggregation of Colloidal Material in Recycling Process Water, TAPPI JOURNAL August 2009
Journal articles
Effect of High-Temperature Drying of Recycled Paper on Heat Transfer Rates and Sheet Properties, TAPPI JOURNAL August 2009
Effect of High-Temperature Drying of Recycled Paper on Heat Transfer Rates and Sheet Properties, TAPPI JOURNAL August 2009
Journal articles
Magazine articles
Boosting the elongation potential of paper by mechanical refining and additives, TAPPI JOURNAL September 2018
Boosting the elongation potential of paper by mechanical refining and additives, TAPPI JOURNAL September 2018
Journal articles
Magazine articles
Dielectric spectroscopic studies of biological material evolution and application to paper, TAPPI JOURNAL September 2018
Dielectric spectroscopic studies of biological material evolution and application to paper, TAPPI JOURNAL September 2018