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New Standards in Paper Production Water Use, Paper360º July/August 2022

Better Valves Improve Pulp and Paper Mill Safety, Paper360º July/August 2022

Chemical Engineers Have a Role in Process Safety, Paper360º July/August 2022

World’s Largest MVR Evaporation Plant for Sulphite Spent Liquor at Sappi Saiccor Pulp Mill, Paper360º July/August 2022

TAPPI Journal Summaries, Paper360º July/August 2022

TAPPI Journal Summaries, Paper360º July/August 2022

Tissue Markets: Trends That Will Shape the Next Five Years, Paper360º July/August 2022

TAPPI News, Paper360º July/August 2022

ASPI News, Paper360º July/August 2022

Editorial: Unlock the gates! TAPPI Journal moves to fully Open Access research for all, TAPPI Journal March 2022

TAPPI and the TAPPI Journal (TJ) Editorial board and staff are pleased to announce that TJ’s content is now immediately open access (OA), with no embargoes. In 2020, the journal had adopted a hybrid OA model wherein its peer-reviewed research was free to TAPPI members for one year and then became free to all on the one-year anniversary of a research paper’s publishing date. Now, research is immediately accessible to all, increasing visibility and engagement for authors and providing an unobstructed view for researchers, students, and other interested parties.

Numerical investigation of the effect of ultrasound on paper drying, TAPPI Journal March 2022

ABSTRACT: The paper drying process is very energy inefficient. More than two-thirds of the total energy used in a paper machine is for drying paper. Novel drying technologies, such as ultrasound (US) drying, can be assessed numerically for developing next-generation drying technologies for the paper industry. This work numerically illustrates the impact on drying process energy efficiency of US transducers installed on a two-tiered dryer section of a paper machine. Piezoelectric transducers generate ultrasound waves, and liquid water mist can be ejected from the porous media. The drying rate of handsheet paper in the presence of direct-contact US is measured experimentally, and the resultant correlation is included in the theoretical model. The drying section of a paper machine is simulated by a theoretical drying model. In the model, three scenarios are considered. In the first scenario, the US modules are positioned in the dryer pockets, while in the second scenario, they are placed upstream of the drying section right after the press section. The third case is the combination of the first and second scenarios. The average moisture content and temperature during drying, enhancement of total mass flux leaving the paper by the US mechanism, total energy consumption, and thermal effect of heated US transducers are analyzed for all cases. Results show that the application of the US can decrease the total number of dryer drums for drying paper. This numerical study is based on the US correlation obtained with the US transducer direct-contact with the paper sample. Thus, future work should include US correlation based on a non-contact US transducer.