抄紙機ヘッドボックスの性能改善について

繊維懸濁液の流動特性

抄録

The purpose of this study was to obtain information that would help to improve the quality of paper produced by papermaking machines. Irregularities in fiber concentration in the flow of pulp suspension, and turbulence intensity, were measured in a duct, at the inlet of which various types of turbulence generators were installed. The turbulence intensity of the suspension flow was measured by two small pressure transducers. Irregularities in concentration were measured by fluctuations in the intensity of light transmitted through the pulp suspension in the duct section. The results show that irregularities in concentration are inversly related to turbulence intensity. It was also found that there is a time delay in the changes of concentration due to turbulence variations. It is believed that the results of this study will provide useful information for the development of improved papermaking machine headboxes.