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首页> 外文期刊>Journal of pulp and paper science >Fibre Damage In Unbleached Reinforcement Pulp - Study On The Effects Of Medium Consistency Fluidization
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Fibre Damage In Unbleached Reinforcement Pulp - Study On The Effects Of Medium Consistency Fluidization

机译：未漂白增强纸浆中的纤维损伤-中浓流化效果的研究

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摘要

The effects of pulp fluidization on fibre properties were investigated in a novel laboratory device enabling pulp fluidization trials at conditions corresponding to the ones in actual mill processes. The results of fluidization trials were compared to industrial fluidization in the oxygen stage mixer. The behavior of fibres in the proximity to the mixing area was also investigated using a new video imaging system. The results from the trials and video imaging showed that during fluidization, the behaviour of fibres in the proximity to the mixing area is highly dependant on the fluidization intensity. If the intensity is high enough, it causes fibres to straighten and orientate with the flow allowing them to flow freely. However, if the fluidization intensity is not sufficient, only flocks will be set in motion, and fibres will remain disoriented inside the flocks thus being subjected to compressive and bending stresses. The study of industrial fluidization in oxygen mixer showed that the mixer in this case caused fibre straightening that was measured as slightly decreased level of fibre deformations after mixer, and did not affect pulp strength properties in other respects.
机译：在新型的实验室设备中研究了纸浆流化对纤维性能的影响，该设备能够在与实际工厂工艺相对应的条件下进行纸浆流化试验。将流化试验的结果与氧气阶段混合器中的工业流化进行了比较。还使用新的视频成像系统研究了纤维在混合区域附近的行为。试验和视频成像的结果表明，在流化过程中，靠近混合区域的纤维的行为高度依赖于流化强度。如果强度足够高，则会使纤维随着流动而变直并定向，从而使其自由流动。但是，如果流化强度不足，则只能使绒毛运动，并且纤维将在绒毛内部保持错位，从而受到压缩应力和弯曲应力。在氧气混合器中进行工业流化的研究表明，在这种情况下，混合器会导致纤维拉直，而纤维拉直的测量方法是混合器后纤维变形程度略有降低，并且在其他方​​面不会影响纸浆强度性能。

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