Influence of dryer fabric on paper drying

干燥网对纸张干燥的影响

• 批准号: 476295-2014
• 负责人: Green, Sheldon
• 金额: $ 1.6万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618573
• 关键词: Influence; dryer; fabric; paper; drying

Papermachines are comprised of three major components: the forming section, the press section, and the dryer section. Although the quality of the paper produced in a papermachine is largely determined by the forming section, 65% of the energy used in a papermachine, and much of the capital cost of a papermachine, is associated with the dryer section. In the dryer section the dryer fabric presses the pulp mat against the heated drying rolls to accelerate the drying process; however, the presence of the dryer fabric on the pulp mat limits the mass transfer rate of water vapour from the mat. As a result of the reduced mass transfer rate, more energy is required to dry the paper than would otherwise be the case. The primary objective of the proposed research is to understand the role of dryer fabric properties on papermachine drying, with the goal of optimization of the dryer fabric geometry to reduce the amount of energy required for the drying process.

纸机由三个主要部分组成：成型部分、压紧部分和干燥部分。虽然造纸机生产的纸张质量在很大程度上取决于成型部分，但造纸机使用的65%的能源，以及造纸机的大部分资本成本，都与干燥部分有关。在干燥部分，干燥织物将纸浆垫压在加热的干燥辊上，以加速干燥过程；然而，干燥织物在纸浆垫上的存在限制了纸浆垫上水蒸气的传质速率。由于传质速率降低，干燥纸张所需的能量比其他情况下要多。提出的研究的主要目的是了解烘干机织物性能对纸机干燥的作用，以优化烘干机织物的几何形状，以减少干燥过程所需的能量。