Flow characteristics of chemical pulp suspension as functions of pulp properties and process parameters

该合作研究项目将由倪永浩博士（申请人），Mark Martinez博士（共同申请人）和Domtar Inc.合作开展。总体目标是：1）研究在不同条件下硫酸盐纸浆悬浮液的流动特性; 2）确定纸浆悬浮液的基本原理与管道中纤维堵塞的发生的关系，此外，开发用于在纸浆米尔斯去除堵塞的具有成本效益的解决方案。 加拿大的纸浆和造纸工业正面临着强大的国际竞争。降低整体制造成本将有助于加拿大纸浆和造纸公司在国际舞台上保持竞争力。该项目的成果不仅将有利于工业合作伙伴Domtar，也将有利于其他加拿大纸浆和造纸公司。因此，拟议的方案与加拿大直接相关。 项目详情/可交付成果包括： 第一章 考察纸浆性质如蒸煮度（脱木素度）对发生管道堵塞的纸浆流的影响; （二） 确定纸浆纤维悬浮液的屈服应力、渗透率等基本参数与纸浆性能的关系; 第三章 制定切实可行和具成本效益的方法，尽量减少纸浆米尔斯厂管道堵塞的发生; 四、 模拟操作参数和纸浆性质对纸浆悬浮液流动特性的影响，以及纸浆纤维的潜在堵塞。 该项目的实际意义在于了解纸浆制造过程中的纤维悬浮液堵塞，并最终解决这种堵塞，这将通过最大限度地减少过程的计划外停机时间来降低化学纸浆生产的制造成本。

This collaborative research project will be undertaken by the partnership of Dr. Yonghao Ni (applicant), Dr. Mark Martinez (co-applicant), and Domtar Inc. The overall objectives are: 1) to investigate the flow characteristics of kraft pulp suspensions at different conditions; and 2) to determine relation of the pulp suspension fundamentals to the occurrence of fiber plugging in pipelines, and furthermore, to develop cost-effective solutions for de-plugging at pulp mills. The Canadian pulp and paper industry is facing strong international competition. Decreasing the overall manufacturing cost will help Canadian pulp and paper companies to remain competitive at the international stage. The results from the project will be beneficial not only to the industrial partner, Domtar, but also to other Canadian pulp and paper companies. Therefore the proposed program is of direct relevance to Canada. The project details/ deliverables include: 1) To investigate the pulp properties such as degree of cooking (degree of delignification) on the occurrence of pipeline blockage of pulp flows; 2) To determine the fundamentals, including the yield stress, permeability of pulp fiber suspension, as a function of pulp properties; 3) To develop practical and cost-effective methods to minimize the occurrence of pipeline blockage at pulp mills; 4) To model the effect of operating parameters and pulp properties on the flow characteristics of pulp suspensions, and the potential plugging of pulp fibers. The practical importance of this project is to understand the fiber suspension plugging in the pulp manufacturing processes, and ultimately resolve this plugging, which will lead to decreased manufacturing costs of the chemical pulp production by minimizing the unplanned downtime of the process.