Effect of Vibration in Forming Tank of WEPS on Retention,  Drainage,  and Formation of Handsheets

Cheol Woo Lee; Kwang Seob Lee; Kyoung Hwa Choi; Jeong-Yong Ryu

doi:10.7584/JKTAPPI.2024.10.56.5.87

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2024 Vol.56, Issue 5 Preview Page Next Page

Research Article

Effect of Vibration in Forming Tank of WEPS on Retention, Drainage, and Formation of Handsheets WEPS의 탈수 시 포밍탱크의 진동이 수초지의 보류와 탈수, 지합에 미치는 영향

30 October 2024. pp. 87-93

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Abstract

In this study, the effects of the intensity of vibrations applied to the forming fabric during the WEPS sheet forming process, which involves vacuum-applied dewatering, on the retention, drainage, and formation of hardwood and softwood pulp stocks were explored. It was found that as the intensity of vibrations increased during the WEPS sheet forming, the drainage of hardwood pulp stock improved, while the drainage of softwood pulp stock deteriorated. Although the changes in retention and formation of hardwood pulp were minimal, significant improvements in the retention and formation of softwood pulp were observed. Specifically, in the case of hardwood pulp, introducing vibrations during vacuum dewatering delayed the initial consolidation of wet web and improved drainage without greatly affecting retention and formation. For softwood pulp, which typically has poor formation and high wet web density, introducing vibrations improved retention and formation but could lead to a decrease in drainage efficiency. Given that the traditional CSF values measured to predict pulp drainage efficiency are not suitable for representing drainage in actual papermaking machines, it was confirmed that comprehensive analysis of retention, drainage, and formation should be conducted by introducing vibrations during vacuum dewatering in laboratory-scale papermaking experiments simulating actual field conditions using WEPS.

Keywords

Wet-end

vibration

drainage

retention

formation

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Information

Publisher :Korea Technical Association of The Pulp and Paper Industry
Publisher(Ko) :한국펄프종이공학회
Journal Title :Journal of Korea TAPPI
Journal Title(Ko) :펄프종이기술
Volume : 56
No :5
Pages :87-93
Received Date : 2024-10-07
Revised Date : 2024-10-14
Accepted Date : 2024-10-14
DOI :https://doi.org/10.7584/JKTAPPI.2024.10.56.5.87

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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