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Low Volume High Concentration (LVHC) and Thermal Oxidation, 1998 Cluster Rule Symposium Proceedings

Low Volume High Concentration (LVHC) and Thermal Oxidation, 1998 Cluster Rule Symposium Proceedings

High Volume Low Concentration (HVLC) Collection Systems, 199

High Volume Low Concentration (HVLC) Collection Systems, 1998 Cluster Rule Symposium Proceedings

HVLC Process Combustion Options for Kraft Pulp Mills, 1998 Cluster Rule Symposium Proceedings

HVLC Process Combustion Options for Kraft Pulp Mills, 1998 Cluster Rule Symposium Proceedings

Special Permitting Issues, 1998 Cluster Rule Symposium Proceedings

Special Permitting Issues, 1998 Cluster Rule Symposium Proceedings

Anaerobic Treatment Condensate: An Cluster Rule MACT Alternative Compliance Option, 1998 Cluster Rule Symposium Proceedings

Anaerobic Treatment Condensate: An Cluster Rule MACT Alternative Compliance Option, 1998 Cluster Rule Symposium Proceedings

Louisiana-Pacific Corporation Samoa Pulp Mill: Mill Experience with Implement of Best Management Practices, 1998 Cluster Rule Symposium Proceedings

Louisiana-Pacific Corporation Samoa Pulp Mill: Mill Experience with Implement of Best Management Practices, 1998 Cluster Rule Symposium Proceedings

Repulpability of Dispersion-Coated Substrates, 2000 Coating Conference Proceedings

Repulpability of Dispersion-Coated Substrates, 2000 Coating Conference Proceedings

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TAPPI News, Paper360º January/February 2021

TAPPI News, Paper360º January/February 2021

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Open Access
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.

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TAPPI Journal Summaries,Paper360º July/August 2021

TAPPI Journal Summaries,Paper360º July/August 2021

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