| 摘要: |
| 【目的】多级复合网式过滤器是一种新研发的微灌用过滤器，将不同目数的滤网（50、80、120目）集成在同一壳体以增加其过滤效果。为研究该过滤器性能，【方法】开展了清水试验，考察过滤器水力性能。同时，开展了浑水试验，以流量和含沙率为因素，其中，流量设置18、22、26m3/h三个水平，含沙率设置0.07、0.10、0.13g/L三个水平，考察水头损失、流量、浊度等指标变化规律。【结果】结果表明：清水试验时，过滤器清洁压降曲线符合幂函数关系，拟合系数0.9949；浑水试验时，当流量一定时，随着含沙率的增大，过滤周期、浊度均随时间增加而减小，而水头损失随时间增加而增大；当含沙率一定时，随着流量的增加，过滤周期、浊度随时间的增加而减小，水头损失反而增大。【结论】新研发的多级复合网式过滤器水力性能变化规律与单一网式过滤器一致，而且过滤周期较长，过滤精度较高，适用于微灌系统。 |
| 关键词: 微灌；网式过滤器；过滤性能；清水试验；浑水试验 |
| DOI： |
| 分类号:S275.6 |
| 基金项目:“十三五”国家重点研发计划项目(2016YFC400202)；中国农业科学院科技创新工程团队农田灌溉研究所“节水高效灌溉技术与装备”项目;中央级科研院所基本科研业务费专项资助项目(FIRI2019-01-01)。 |
|
| Experimental study on hydraulic performance of multi-stage composite mesh filter |
|
lishengbao
|
|
henan agricultural university
|
| Abstract: |
| 【Objective】The multi-stage composite mesh filter is a newly developed micro-irrigation filter. It integrates different meshes (50, 80, 120 mesh) in the same casing to increase its filtering effect. In order to study the filter performance, 【method】 carried out a clean water test to investigate the hydraulic performance of the filter. At the same time, a muddy water test was carried out, taking the flow rate and the sand content as factors. Among them, the flow rate was set at three levels of 18, 22, and 26 m3 / h, and the sand content rate was set at three levels of 0.07, 0.10, and 0.13 g / L. Loss, flow, turbidity and other indicators change law. 【Results】The results show that: in the clean water test, the filter pressure drop curve conforms to a power function relationship with a fitting coefficient of 0.9949; in the muddy water test, when the flow rate is constant, the filtration cycle and turbidity increase with the increase of the sand content Both decrease with time, and the head loss increases with time. When the sand content is constant, as the flow rate increases, the filtration cycle and turbidity decrease with time, and the head loss increases instead. 【Conclusion】The newly developed multi-stage composite mesh filter has the same hydraulic performance change law as the single mesh filter, and has a longer filtration cycle and higher filtration accuracy, which is suitable for micro irrigation systems. |
| Key words: Micro irrigation; mesh filter; filtration performance; fresh water test; muddy water test |
