基于小型环管试验的膏体管道输送阻力特性研究

Study on Resistance Characteristics of Paste Pipeline Transportation Based on Small-Scale Loop Pipe Test

为研究膏体管道输送过程中的阻力特性,自主设计研发了一套小型闭路环管试验装置,开展膏体料浆在不同流速、质量浓度和平均粒径等工况条件下的环管试验,并利用灰色关联法分析各因素对管道输送阻力的影响强弱。结果表明,管道输送阻力对膏体质量浓度的变化最为敏感,管道输送阻力随质量浓度增加呈指数增长;膏体流速对管道输送阻力的影响仅次于质量浓度,管道输送阻力随流速增加呈线性增长;膏体平均粒径对管道输送阻力的影响有双重性,随着平均粒径增大,管道输送阻力呈先减小再增大的变化趋势。研究结果可为膏体充填输送系统的合理设计及优化布置提供理论支撑。

In order to study the resistance characteristics of paste pipeline transportation,a small-scale closed-circuit loop pipe test device was designed and developed.The loop test of paste slurry under different flow rates,mass concentrations and average particle sizes were carried out,and the influences of various factors on pipeline transportation resistance were analyzed by grey correlation method.The results are concluded as follows.Firstly,the pipeline transportation resistance is most sensitive to the change of paste mass concentration,and the pipeline transportation resistance increases exponentially with the increase of mass concentration.Secondly,the influence of paste flow rate on pipeline transportation resistance is second only to mass concentration,and the pipeline transportation resistance increases linearly with the increase of flow rate.Thirdly,the influence of the average particle size of the paste on the pipeline transportation resistance is dual.As the average particle size increases,the pipeline transportation resistance decreases first and then increases.The research results can provide a theoretical support for the rational design and optimal arrangement of paste filling conveying system.