Development and optimisation of disk filter for high consistency paper stock dewatering and fiber recovery

在过去的10年里，加拿大的纸张和纸板生产发生了重要的转变。印刷和书写品级的需求急剧下降导致了几家工厂关闭，但纸巾和包装行业的需求却出现了强劲而持续的增长。该行业还必须面对在提高产品质量的同时减少能源和水资源消耗的挑战。因此，**工业上对高效设备的需求非常强烈，包括首先准备纸浆，然后生产所需的**纸张和纸板牌号。**卡丹特是纸浆准备和流程系统的领先供应商，旨在生产高质量的**白纸和棕纸牌号，在使用再生纤维纸浆方面拥有丰富的专业知识。该公司开始**开发一种圆盘过滤器，可以处理高固体比例(高浓度)的纤维浆料。**Innofire在这一开发中处于领先地位。专门为**开发工作设计的圆盘式过滤器的中试规模装置位于Innofibre，Kadant和Innofibre的共同努力已经取得了重大**进展。**本研究提案的目标是在纸浆和造纸工业的现代背景下**追求圆盘式过滤器的发展。该项目将首先关注白水纤维的回收，然后进一步**开发圆盘过滤器，以浓缩相对较高浓度的纸浆(固体含量大于1%**)。这些目标与加拿大纸浆和造纸业最近转向**生产箱纸板和提高纸厂生产能力是一致的，这两种现象都需要更好的**脱水能力和水循环。

The last 10 years have seen an important shift in the production of papers and boards in Canada. The sharp**demand decline for printing and writing grades lead to several mill closures but the tissue and packaging**sectors of the industry rather see a strong and persistent increase in demand. The industry must also face the**challenge of reducing energy and water consumption while increasing the quality of its products. There is thus**a strong industrial need for efficient equipment, both to first prepare the pulp and then produce the required**paper and board grades.**Kadant is a leading supplier of stock preparation and approach flow systems designed to produce high-quality**white and brown paper grades, with extended expertise in the use of recycled fiber pulps. The company started**the development of a disk filter that can process a fiber slurry with a high solid proportion (high consistency).**Innofibre plays a leading role in this development. A pilot scale unit of the disk filter, specially designed for**development work, is located at Innofibre and joint efforts by Kadant and Innofibre already led to significant**advances.**The goal of the present research proposal is to pursue the development of the disk filter in the modern context**of the pulp and paper industry. This project will first focus on white water fiber recovery and then further the**development of the disk filter to the thickening of relatively high consistency pulp (larger than 1 % in solid**content). These objectives are in line with recent shifts in the Canadian pulp and paper industry towards the**production of linerboard and the increased mill production capacity, both phenomena requiring better**dewatering capacity and water recycling.