浆体的物理特性与管道输送流速

The Physical Property of Slurry and its Velocity of Pipeline Transportation

浆体管道的输送流速直接影响管道运输的安全与经济。以往由于没有把浆体的物理特性 (即固体颗粒组成及浆体粘性 )作为一个影响管道输送参数的重要因素来考虑 ,所以迄今为止 ,很多管道不淤流速公式未能摆脱纯经验性质而缺乏普遍的实用意义。本文通过分析及大量试验资料验证 ,系统研究了影响管道不淤流速的各项因素及浆体粘性的明显作用 ,因而阐明了一定条件下浆体浓度的提高 ,有利于降低管道输送流速 ,从而可以进一步提高管道输送浆体的综合效益。

The velocity of slurry in pipe effect the economy and safety of transportation.In recent years many formulas of nonsettling velocity for slurry were developed without considering the characteristic of slurry as an important parameter,hence the application of these formulas is limited.In this paper based on the theory of suspension rheology and by using a great amount of experimental material,a new expression of nonsettling velocity is developed.the influence of slurry viscosity,solid concentration and the diameter of pipe on the nonsettling velocity is analysed in detail.The results of study indicate that in a given condition the increment of solid concentration and slurry will bring to decrease the critcal velocity in pipe.and It is favourable to increase the comprehensive efficiency of slurry transport by pipeline.