冲洗压力及周期对滴灌灌水器堵塞性能的影响

Effect of Washing Pressure and Cycle on Clogging Performance of Drip Emitters

为了探究不同冲洗压力及周期对灌水器堵塞性能的影响,以提高滴灌系统对含砂率较高的地表水源的适应性,采用室内短周期间歇性浑水滴灌试验,配置浑水的含砂率为3.0g/L,研究了3种冲洗压力(0.003,0.006,0.012MPa)和3种冲洗周期(1,4,7d及无冲洗组)对滴头堵塞性能、管道内泥沙分布及滴头内滞留泥沙的影响,结果表明:冲洗压力及冲洗周期对滴头使用寿命均有显著影响。在9种冲洗组合措施中,毛管最佳冲洗处理组比未冲洗组对照滴头使用时间提高52.41%。为保持良好的灌水器抗堵塞性能和降低滴灌系统的运行成本,推荐使用的冲洗压力为0.12MPa,冲洗周期为4d。冲洗能够降低大颗粒泥沙进入迷宫流道,并减少小颗粒泥沙絮凝胶结在管道内壁,从而提高滴头抗堵塞性能,延长滴头使用时间。

In order to explore the influence of different washing pressure and cycle on the clogging performance of emitters,to improve the adaptability of the drip irrigation system to the surface water source with high sand content,this paper adopts the indoor intermittent muddy water drip irrigation test with the sand content of 3.0 g/l.The effects of three washing pressures(0.003,0.006,0.012 MPa)and three washing cycles(1,4,7 d and no washing group)on the plugging performance of the dripper,the distribution of sediment in the pipeline and the retained sediment in the dripper are studied.The results showed that the washing pressure and washing cycle had significant effect on the use time of dripper.Among the nine washing combinations,the best washing treatment group of tubular-billet increased the use time of dripper by 52.41%compared with the control group.In order to maintain the good anti-clogging performance of emitter and reduce the operation cost of drip irrigation system,the recommended washing pressure was 0.12 MPa and washing cycle was 4 d;Washing can reduce the large particles of sediment into the labyrinth channel and reduce the small particles of sediment in the inner wall of the pipeline,thereby improving the anti-clogging performance of the emitter and prolonging the service time of the emitter.