再生水滴灌系统滴头抗堵塞性能试验研究

为了得到再生水灌溉对滴灌流量的影响规律及滴头抗堵塞性能,该文通过试验对再生水灌溉条件下11种不同滴头流道的流量变化进行了研究.结果表明:再生水灌溉条件下滴头流量的降幅与流道长度、流道截面积呈现正相关关系,具有反冲洗功能的滴头可以有效防止堵塞.田间试验表明,再生水处理滴头流量与地下水处理相比明显下降,流道沉积物富集是导致滴头流量衰减的主要原因.建议再生水滴灌系统选择具有反冲洗功能的滴头或者滴头流道较短、流道截面积较小的滴头,可有效降低堵塞的发生,为再生水灌溉系统科学选型与配套提供依据.

Experimental study on anti-clogging performance of emitters for reclaimed wastewater irrigation

In order to find out the anti-clogging performance of emitters and effct law of reclaimed wastewater irrigation (RWI) on the flow of drip irrigation, discharge changes of eleven kinds of emitters under reclaimed wastewater irrigation were tested. The result shows that the decreasing range of emitter flux has positive relation with labyrinth path length and labyrinth path sectional area, and the emitters with the function of self-flushing has less flux variety compared with others. In field experiments, emitter flux of reclaimed wastewater treatment decreases significantly compared with groundwater treatment. The enrichment of sediment is the main reason leading to flow attenuation. So emitters with the function of self-flushing, shorter labyrinth path length and smaller labyrinth path sectional area should be selected to prevent emitters clogging. The study can provide evidence for scientific selection and matching of reclaimed wastewater irrigation system.