盘磨机低浓磨浆过程强度表征的有效性及应用

Effective Refining Intensity and Its Application in Low Consistency Refining Process by Disc Refiner

关键词:  制浆造纸  盘磨机  低浓磨浆  磨浆强度  表征参数

Key Words:pulp and papermaking  disc refiner  low consistency refining  refining intensity  characterization parameter

摘要:本课题采用理论分析方法研究了现有低浓磨浆强度对于不含挡坝等距直齿磨盘低浓磨浆过程的强度表征效果。结果表明，单个磨齿交错区域的净法向力（f_n^net）及切向力（f_t^net）是目前唯一具有实际意义的有效低浓磨浆强度，其不仅适用于不含挡坝等距直齿磨盘低浓磨浆过程的表征，并可扩展至含挡坝磨盘及弧形齿磨盘。而具有实际意义的比边缘负荷（SEL_C及SEL_T）的应用具有一定的局限性，仅适用于恒定参数磨盘低浓磨浆过程的强度表征。实际上，低浓磨浆强度的合理建立、选择及应用不仅反映对磨浆机理的认知，且直接影响低浓磨浆过程的优化控制、齿型参数设计及选择。

Abstract:In this paper， a theoretical analysis was conducted to investigate the characterization effect of the existing refining intensity on the refining process conducted by straight bar plates without dam. The results showed that the net normal force （f_n^net） and tangential force （f_t^net） per bar crossing zone were the only two effective refining intensity， which not only were applicable to the characterization of low consistency refining conducted by straight bar plates without dams， but also could be extended to plates with dams and curved bars. The application of Specific Edge Load （SEL_C and SEL_T） with physical meanings was limited and they were only applicable to the characterization of low consistency refining conducted by plates with constant angular parameters. The reasonable establishment， selection and application of refining intensity not only were related to the understanding of the refining mechanism， but also directly affected the optimal control of low consistency refining， the design and selection of refiner plates.