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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
Applications of Infrared Thermography in Industrial Facilities, 20PEERS Conference

Applications of Infrared Thermography in Industrial Facilities, 20PEERS Conference

Conference papers
Hydraulic Root Cause Failure Analysis, 20PEERS Conference

Hydraulic Root Cause Failure Analysis, 20PEERS Conference

Conference papers
New Revenue Opportunities for Pulp and Paper Sector from Carbon Capture, 20PEERS Conference

New Revenue Opportunities for Pulp and Paper Sector from Carbon Capture, 20PEERS Conference

Conference papers
FEL1 and 2 • The Beginnings of Successful Paper Machine Conversions, 20PEERS Conference

FEL1 and 2 • The Beginnings of Successful Paper Machine Conversions, 20PEERS Conference

Conference papers
Down Flow Cooking Process Optimization • A Case Study At A Southern US Mill, 20PEERS Conference

Down Flow Cooking Process Optimization • A Case Study At A Southern US Mill, 20PEERS Conference

Conference papers
No Cost Solution for Wood Chip Handling, 20PEERS Conference

No Cost Solution for Wood Chip Handling, 20PEERS Conference

Conference papers
Energy Saving Potential of Screen Fractionation for Production of BCTMP, 20PEERS Conference

Energy Saving Potential of Screen Fractionation for Production of BCTMP, 20PEERS Conference

Conference papers
Development of Novel Acoustic Sensors with Learning Algorithm to Forecast Dissolving Tank Anomalies, 20PEERS Conference

Development of Novel Acoustic Sensors with Learning Algorithm to Forecast Dissolving Tank Anomalies, 20PEERS Conference

Conference papers
Application of refined water? soluble lignin for surface sizing, 20PEERS Conference

Application of refined water? soluble lignin for surface sizing, 20PEERS Conference

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