Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Event Type
Collections
Journal articles
Magazine articles
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.
Conference papers
Reducing Batch Digester Vessel Wall Degradation Due to Corrosion and Erosion to Optimize Reliability and Productivity, 19PEERS
Reducing Batch Digester Vessel Wall Degradation Due to Corrosion and Erosion to Optimize Reliability and Productivity, 19PEERS
Conference papers
How Deep Learning is Used to Increase the Quality Control of Wood Chips by Classification, 19PEERS
How Deep Learning is Used to Increase the Quality Control of Wood Chips by Classification, 19PEERS
Conference papers
Energy Saving Basic & High Alumina Lining Concepts For Rotary Kilns, 19PEERS
Energy Saving Basic & High Alumina Lining Concepts For Rotary Kilns, 19PEERS
Conference papers
Project Collaboration for Optimal Results Mill Perspective, 19PEERS
Project Collaboration for Optimal Results Mill Perspective, 19PEERS
Conference papers
Project Collaboration for Optimal Results Engineering & Construction, 19PEERS
Project Collaboration for Optimal Results Engineering & Construction, 19PEERS
Conference papers
Select the Right Brown Stock Defoamer for your Washing Operations, 19PEERS
Select the Right Brown Stock Defoamer for your Washing Operations, 19PEERS
Conference papers
Effect of Defoamer on the Gas Content and Performance of O2 washers • Mill Case Study, 19PEERS
Effect of Defoamer on the Gas Content and Performance of O2 washers • Mill Case Study, 19PEERS
Conference papers
Optimizing Mill Effectiveness Through Statistical Process Control (SPC), 19PEERS
Optimizing Mill Effectiveness Through Statistical Process Control (SPC), 19PEERS
Conference papers
Study on Recovered Paper Quality in Germany and Method for Determining the Composition of Recovered Paper Samples, 19PEERS
Study on Recovered Paper Quality in Germany and Method for Determining the Composition of Recovered Paper Samples, 19PEERS