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Crossflow filtration of green liquor for increased pulp production, improved green liquor quality, and energy savings, TAPPI JOURNAL October 2020
ABSTRACT: A new green liquor filtration system has been installed and commissioned at the Ence pulp mill in Pontevedra, Spain. The filtration system is based on microfiltration and was developed in collaboration with the KTH Royal Institute of Technology in Stockholm, Sweden. The patented method for efficient purification of green liquor decreases the non-process element (NPE) content by providing more efficient solids/liquid separation, reducing energy and chemical consumption in pulp mills and increasing production capacity by eliminating certain capacity bottlenecks. The process has been continuously tested at the Aspa Bruk Mill outside Askersund, Sweden, since 2013. The technology has proven to create nearly particulate-free green liquor during the purification process. The technology can also be used to polish white liquor to provide higher pulp quality.To provide for a simple and cost-effective installation, the system was designed as a skid-mounted unit that is pre-piped, instrumented, and tested before shipment. The system is modular and allows for easy expansion of capacity. This paper discusses the process design, process integration, and startup of the new system, along with experiences from the first months of operation.
Conference papers
Black Liquor Evaporators Upgrade - Life Cycle Cost Analysis, 20PEERS Conference
Black Liquor Evaporators Upgrade - Life Cycle Cost Analysis, 20PEERS Conference
Conference papers
Peracetate/Singlet Oxygen Chemistry Used in Post-Bleaching of Kraft Pulp is a Practical Oxidant for Paper Machines, 20PEERS Conference
Peracetate/Singlet Oxygen Chemistry Used in Post-Bleaching of Kraft Pulp is a Practical Oxidant for Paper Machines, 20PEERS Conference
Conference papers
Long-Term Corrosion Studies Of Pine Derived Bio-Oil And Blends With Heavy Fuel Oil, 20PEERS ConferenceLong-Term Corrosion Studies Of Pine Derived Bio-Oil And Blends With Heavy Fuel Oil, 20PEERS Conference
Long-Term Corrosion Studies Of Pine Derived Bio-Oil And Blends With Heavy Fuel Oil, 20PEERS Conference
Conference papers
Accelerated Sludge Digestion at a Kraft Mill Using a Biostim
Accelerated Sludge Digestion at a Kraft Mill Using a Biostimulant, 2015 PEERS Conference
Conference papers
High Power Generation From Recovery Boilers, What Are The Li
High Power Generation From Recovery Boilers, What Are The Limits?, 2015 PEERS Conference
Conference papers
Evaporators, The Place To Look For Energy And Water Usage Re
Evaporators, The Place To Look For Energy And Water Usage Reductions, 2015 PEERS Conference
Co-firing biomass with coal in CFB boilers, 2008 Engineering, Pulping and Environmental Conference
Co-firing biomass with coal in CFB boilers, 2008 Engineering, Pulping and Environmental Conference
CURRENT STATUS OF ALTERNATIVE FUEL USE IN LIME KILNS, 2008 Engineering, Pulping and Environmental Conference
CURRENT STATUS OF ALTERNATIVE FUEL USE IN LIME KILNS, 2008 Engineering, Pulping and Environmental Conference
Deinking of Flexographic Newsprint, 2008 Engineering, Pulping and Environmental Conference
Deinking of Flexographic Newsprint, 2008 Engineering, Pulping and Environmental Conference