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Journal articles
Magazine articles
Effects of a PFI refiner’s operational parameters on the swellability of recycled fiber, TAPPI Journal May 2020

ABSTRACT: This paper presents data on the effects of operational parameters (number of revolutions, linear pressure, and gap) of the PFI refiner on the swellability of recycled fiber, which was characterized by water retention value (WRV). The results showed that the increase of recycled fiber’s WRV was proportional to the number of revolutions and the linear pressure, but inversely proportional to the gap. The mathematical relation between these parameters and the fiber WRV could be described by an empirical model for gaps greater than 0.1 mm. Scanning electron microscopic images of fiber morphology showed that the basic framework of fibers could be maintained with the gap greater than 0.1 mm, but was destroyed with smaller gaps. This model provides a technical reference for quantitative control of refining treatment and an effective method for improving recycled fiber quality.

Journal articles
Magazine articles
Open Access
Alternative “green” lime kiln fuels: Part I—Pulping/recovery byproducts, TAPPI Journal May 2020

ABSTRACT: This paper is the first of a two-part series on “green” lime kiln fuels. The first part of this work reviews the use of pulp mill and recovery byproducts as either full or partial replacement of oil or natural gas in the kiln. The second part reviews the use of various forms of woody biomass, bio-oils, gasification, and hydrogen as potential carbon neutral or carbon-free lime kiln fuels.

Conference papers
Hydraulic Root Cause Failure Analysis, 20PEERS Conference

Hydraulic Root Cause Failure Analysis, 20PEERS Conference

Journal articles
Magazine articles
Open Access
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
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

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