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大变化。印刷和书写等级的需求急剧下降导致几家工厂关闭，但该行业的纸巾和包装行业的需求却强劲而持续地增长。该行业还必须面对在提高产品质量的同时减少能源和水消耗的挑战。因此，** 工业上对高效设备的需求很大，既要先制备纸浆，又要生产所需的 ** 纸和纸板等级。** Kadant是一家领先的浆料制备和流送系统供应商，其设计用于生产高质量的 ** 白色和棕色纸张，并在使用再生纤维纸浆方面拥有丰富的专业知识。公司开始 ** 开发可处理高固体比例（高浓度）纤维浆料的盘式过滤器。** Innofibre在这一发展中发挥着主导作用。专门为 ** 开发工作设计的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的 ** 进展。本研究计划的目标是在纸浆和造纸工业的现代背景下追求盘式过滤器的发展。该项目将首先关注白色水纤维回收，然后进一步开发盘式过滤器，以浓缩相对高浓度的纸浆（固体含量大于1%）。这些目标符合加拿大纸浆和造纸工业最近向挂面纸板生产和工厂生产能力增加的转变，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.