Decreasing specific energy of thermomechanical pulps from reduction of raw materials variability

September 2009 Pub Date : 2009-10-01 DOI:10.32964/tj8.9.23
E. Dundar, L. Laperrière, F. Ding
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引用次数: 6

Abstract

Wood chip characteristics including species, basic and bulk densities, moisture content, freshness, bark content, and size distribution strongly influence the specific energy consumption (SEC) of thermomechanical pulping. Changes in these characteristics lead to variations in the mass flow rate of the chips fed into the refiner, causing SEC variations. In a typical mill with normal operating conditions, up to 30% of the disturbances in the pulp-ing process can be explained by chip variations. For this paper, researchers used an online measurement system, CMSE (chip management system, extended version), to monitor chip characteristics to study the effect of chip variability on SEC. Models and simulations were built from pilot experiments and results were validated by mill trials.
通过减少原料的可变性来降低热机械纸浆的比能
木屑的种类、基本密度和容重、含水率、新鲜度、树皮含量和粒度分布等特征对热机械制浆的比能耗(SEC)有很大影响。这些特性的变化导致送入精炼厂的芯片质量流率的变化,导致SEC变化。在正常运行条件下的典型磨机中,制浆过程中高达30%的扰动可以用切屑变化来解释。在本文中,研究人员使用在线测量系统CMSE (chip management system, extended version)来监测芯片特性,以研究芯片可变性对SEC的影响。通过中试实验建立模型和仿真,并通过工厂试验验证结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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