Multiscale modeling of fiber deformation: Application to a batch pulp digester for model predictive control of fiber strength
Multiscale modeling of fiber deformation: Application to a batch pulp digester for model predictive control of fiber strength
复制标题
纤维变形的多尺度建模：在间歇式纸浆蒸煮器中的应用，用于纤维强度的模型预测控制
DOI：
10.1016/j.compchemeng.2021.107640
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Jay H. Lee
中科院分区：
文献类型：
--
作者：
Juyeong Jung;Hyun;S. Son;J. Kwon;Jay H. Lee
轻量化包装作为一种减少二氧化碳排放的有效途径，在制浆造纸工业中得到了广泛的关注。其中一个挑战是，决定最大载荷的包装纸的抗张强度必须与传统包装材料的抗张强度相当。在纸浆消化池中，木纤维在制浆过程中被化学分离和物理变形，导致最终用途纸的抗张强度的动态变化。在这项工作中，结合Choi和Kuan(2019a)的多尺度模型框架和经典的柱屈曲理论，描述了硫酸盐法制浆过程中纤维的变形。然后，辨识出一个近似模型，并利用该模型设计了一个模型预测控制系统来调节纤维在制浆过程中的变形。与传统制浆策略相比，所提出的控制系统实现了较低程度的纤维变形，从而有助于提高最终用途纸的抗张强度。
Lightweight packaging in the pulp and paper industry has received much attention as an effective way to reduce CO2emissions. One challenge is that the tensile strength of packaging papers, which determines the maximum load, has to be comparable to that of conventional packaging materials. In a pulp digester, wood fibers are chemically separated and physically deformed during pulping, resulting in the dynamic change of tensile strength of end-use papers. In this work, the deformation of fiber during Kraft pulping is described by integrating the multiscale modeling framework of Choi and Kwon (2019a) and the classical column buckling theory. Then, an approximate model is identified and employed to design a model predictive control system to regulate the fiber deformation during pulping. The proposed control system achieved a lower degree of fiber deformation than a conventional pulping strategy, thereby contributing to the enhanced tensile strength of end-use papers.