中浓纸浆悬浮液塞流流动的实验研究

Study on the Plug Flow of Medium-consistency Pulp Suspensions by Experiment

采用高压气送及数据采集的方法系统地研究了中浓纸浆悬浮液在圆管内塞流流动的流体动力学特征,计算了中浓纸浆悬浮液流动的相关流体动力学参数,分析了纸浆的流动特性与纸浆密度及外界作用力的内在关系,以及中浓纸浆悬浮液达到稳定塞流时的流动形态。还研究探讨了中浓纸浆悬浮液塞流流动的多孔介质现象。在工程上可为中浓纸浆与漂剂混合后塞流段各相间的物理作用提供一定的流体动力学依据,进而使各类漂剂最大程度地在纸浆中进行扩散和均匀分布。

This paper studied the plug flow characteristic of Medium-Consistency pulp suspensions in the pipeline based on the high pressure gas delivery and virtual instrument technology, and measured the hydrodynamic parameters of MC pulp under the different external conditions. The relationships of the flow characters and the influencing factors were determined in this paper. At the same time, the porous medium phenomenon in the stable plug flow of MC pulp was discussed, the study can provide some valuable data for the engineering application.