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| Drying Characteristics of Pulpsheet by Hot-air Based on Weibull Distribution |
| Received:October 18, 2019 |
| DOI：10.11980/j.issn.0254-508X.2020.06.009 |
| Key Words:pulpsheet hot-air drying drying characteristics Weibull distribution |
| Fund Project:国家自然科学基金项目（21808135）；广西中青年基础能力提升项目（2018KY0039）；陕西高校青年创新团队。 |
| Author Name | Affiliation | Postcode | | YANG Xing | College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi Province, 710021 | 710021 | | KONG Lingbo | College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi Province, 710021 | 710021 | | XIE Shan | College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi Province, 710021 | 710021 | | DONG Jixian | College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi Province, 710021 | 710021 | | YIN Yongjun | College of Light Industry and Food Engineering, Guangxi University, Nanning, Guangxi Zhuang Autonomous Region, 530004 | 530004 |
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| Abstract:In this study, the effects of temperature and velocity of hot air on drying characteristics of unbleached softwood pulpsheet were investigated. The drying characteristic curve was modeled with Weibull distribution model. In addition, the quantitative relationships of scale parameter α and shape parameter β of the model with hot air temperature and velocity were established. The research showed that Weibull distribution model was good at modeling the pulpsheet drying process using hot air. It was found that using the scale parameter α was related to the air temperature and velcotiy,and α would decreased as air temperature and velocity raising. While the shape parameter β was mainly affected by air velocity. And the changes of β and velocity of hot air were opposite. The estimated water diffusion coefficient of pulpsheet was in the range from 2.116×10-7 to 3.251×10-7 m2/s during the drying, and the average activation energy was 14.8 kJ/mol. |
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