神府煤水煤浆管道输送试验研究

Pipeline transportation experiments of Shenfu coal water mixture

为获得神府煤水煤浆最佳管道输送参数,进行了水煤浆流变性试验,确定了水煤浆临界剪切速率。通过水煤浆剪切速率和剪切应力的关系确定神府煤水煤浆流变性模型,拟合出适于神府煤水煤浆流变性的数学方程。在不同管道直径和水煤浆浓度下,研究了水煤浆平均速率对管道压力损失的影响,得到了最佳水煤浆管道输送参数。结果表明：神府煤水煤浆临界剪切速率为40.74 s^-1,水煤浆拟合后的流变方程符合宾汉塑性体模型,适宜泵送和管道输送。低浓度、低黏度的水煤浆更适合管道输送。在水煤浆平均流速相同的条件下,管道直径越小,管道压力损失越大。管道直径为200～300 mm时,神府煤水煤浆在管道输送中的压力损失在工业应用合理范围内,适宜管道输送。

To obtain the optimum Shenfu coal water mixture（ CWM） pipeline transportation parameters,the CWM rheology test was conducted to determine its critical shear rate. Through the relationship between the shear rate and shear stress of Shenfu CWM determined its rheology model,fitted the mathematical equation which was suitable for Shenfu CWM. Under different pipe diameters and CWM concentration,investigated the influence of CWM average rate on pipeline pressure loss,obtained the optimum CWM pipeline transportation parameters. The results show that the critical shear rate of CWM is 40. 74 s^-1,the fitting rheological equation follows the bingham plastic model.The pipeline is more suitable for low concentration and low viscosity CWM. Keep the average flow velocity of CWM unchanging,the smaller the pipe diameter,the bigger the pipeline pressure loss. When the pipe diameter ranges from 200 mm to 300 mm,the pipeline pressure loss meets the demands of industrial application.