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| Application and Practice of Refining-Screening Mode in Reconstituted Tobacco Production by Papermaking |
| Received:April 22, 2022 |
| DOI：10.11980/j.issn.0254-508X.2022.09.018 |
| Key Words:medium concentration pressure screen low refining degree high wet weight high absorbability |
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| Abstract:The processing mode of reconstituted tobacco pulp was optimized from traditional refining mode to refining-screening mode through the combining form of medium concentration pressure screen and backflow stand pipe. Based on the ensurance of pulp uniformity， the refining-screening mode realized low refining degree and high wet weight of pulp. The results showed that compared with traditional refining mode， the refining degree of finished pulp decreased from 46°SR to 34°SR， decreasing by 26.1%； wet weight increased from 3.1 g to 4.1 g， increasing by 32.3%； the air permeance of substrate increased from 2300~2500 mL/min to 4000~4200 mL/min， increasing by more than 70%； uniformity index increased from 342 to 371， increasing by 9.1%； static friction of the front of base sheet increased from 93 N to 112 N， increasing by 20.4%； instant absorbability increased from 2.8°/s to 4.6°/s， increasing by 64.3%. Moreover， based on the annual output of 7500 t， the pulping energy cost under refining-screening mode could decrease by 0.3641 million CNY every year. |
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