Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Event Type
Collections
Journal articles
Magazine articles
The Paper360° TOP 75, Paper360º September/October 2019
The Paper360° TOP 75, Paper360º September/October 2019
Journal articles
Magazine articles
To Canfor, Pulp is Much More than a Commodity, Paper360º September/October 2019
To Canfor, Pulp is Much More than a Commodity, Paper360º September/October 2019
Journal articles
Magazine articles
Visible and Invisible Costs, Paper360º September/October 2019
Visible and Invisible Costs, Paper360º September/October 2019
Journal articles
Magazine articles
Why Are Foreign Companies Investing in North American Pulp and Paper?, Paper360º September/October 2019
Why Are Foreign Companies Investing in North American Pulp and Paper?, Paper360º September/October 2019
Journal articles
Magazine articles
A novel unit operation to remove hydrophobic contaminants, TAPPI Journal April 2020
ABSTRACT: For mills making paper with recovered fiber, removal of hydrophobic contaminants is essential for trouble-free operation of paper machines. Significant cost savings on paper machine operation can be achieved by reducing deposits, which results in better quality, reduced downtime, increased fiber yield, and reduced energy consumption. Bubble nucleation separation (BNS) is a relatively new process for removing hydrophobic particles. When vacuum is applied to a slurry, dissolved gas bubbles nucleate on hydrophobic particles and drag them to the surface for easy removal. We constructed a 16-L batch unit to evaluate the effect of operating parameters on removal of hydrophobic particles, using statistical design of experiments. These results were used to guide our design of a 16-L continuous unit. We tested this unit on laboratory and mill samples. The removal of 60%•80% of hydrophobic particles was achieved with a low reject rate of < 2%.Following on this success, we built a 200-L pilot unit and tested it in our pilot plant. With promising results there, we installed the pilot unit at a commercial paper recycling mill. Over the course of several mill trials, we showed that it was possible to remove a considerable amount of suspended solids from paper machine white water with less than 2% rejects. Unfortunately, due to the unit only treating 50 L/min and the mill flow being 12000 L/min, we were not able treat a sufficient portion of the white water to know whether a large-scale implementation of BNS would improve paper machine runnability.
Conference papers
Axchem USA New Dry Strength Technologies, PaperCon 2016
Axchem USA New Dry Strength Technologies, PaperCon 2016
Journal articles
Magazine articles
Stretchable Paper—Yes, Really!, Paper360º January/February 2
Stretchable Paper—Yes, Really!, Paper360º January/February 2017