Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Collections
Journal articles
Magazine articles
Addressing production bottlenecks and brownstock washer optimization via a membrane concentration system, TAPPI Journal July 2021
ABSTRACT: Advancements in membrane systems indicate that they will soon be robust enough to concentrate weak black liquor. To date, the economic impact of membrane systems on brownstock washing in kraft mills has not been studied and is necessary to understand the viability of these emerging systems and their best utilization.This study investigated the savings that a membrane system can generate related to brownstock washing. We found that evaporation costs are the primary barrier for mills seeking to increase wash water usage. Without these additional evaporation costs, we showed that our hypothetical 1000 tons/day bleached and brown pulp mills can achieve annual savings of over $1.0 MM when operating at higher dilution factors and fixed pulp production rate. We then investigated the impact of increasing pulp production on mills limited by their equipment. In washer-limited mill examples, we calculated that membrane systems can reduce the annual operating cost for a 7% production increase by 91%. Similarly, in evaporator-limited mill examples, membrane systems can reduce the annual operating cost for a 7% production increase by 86%. These results indicated that membrane systems make a production increase significantly more feasible for these equipment-limited mills.
Journal articles
Magazine articles
SetPoint: Under the Influence, Paper360º July/August 2021
SetPoint: Under the Influence, Paper360º July/August 2021
Journal articles
Magazine articles
Perfecting Safety Recordkeeping: How Technology is Upping the Ante, Paper360º July/August 2021
Perfecting Safety Recordkeeping: How Technology is Upping the Ante, Paper360º July/August 2021
Journal articles
Magazine articles
A Challenging Year, Paper360º July/August 2021
A Challenging Year, Paper360º July/August 2021
Journal articles
Magazine articles
Uruguay Prepares to Open a Gateway to the World, Paper360º July/August 2021
Uruguay Prepares to Open a Gateway to the World, Paper360º July/August 2021
Journal articles
Magazine articles
The Paper360° 2021 TOP 50 POWER LIST, Paper360º July/August 2021
The Paper360° 2021 TOP 50 POWER LIST, Paper360º July/August 2021
Journal articles
Magazine articles
Thinking Beyond the Basement, Paper360º July/August 2021
Thinking Beyond the Basement, Paper360º July/August 2021
Journal articles
Magazine articles
TAPPI Journal Summaries,Paper360º July/August 2021
TAPPI Journal Summaries,Paper360º July/August 2021
Journal articles
Magazine articles
Escalating Pressure for Uncoated Woodfree Producers in Europe Raises Essential Questions, Paper360º July/August 2021
Escalating Pressure for Uncoated Woodfree Producers in Europe Raises Essential Questions, Paper360º July/August 2021
Journal articles
Magazine articles
TAPPI News,Paper360º July/August 2021
TAPPI News,Paper360º July/August 2021