浑水条件下鱼雷网式过滤器的试验研究
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摘要
【目的】深入研究鱼雷网式过滤器的水头损失和过滤时间。【方法】浑水条件下,对2种滤网目数的鱼雷网式过滤器分别进行定含沙量和定流量试验,分析了水头损失在不同运行条件下的变化规律。【结果】定含沙量试验中,进水流量在240～300 m3/h范围内持续增大时,水头损失发生急剧变化所需时间逐渐延长,而在300～360 m3/h范围内持续增大时,水头损失急剧变化所需时间逐渐缩短,这是鱼雷部件起到关键作用的缘故;定流量试验中,随进水含沙量增大,过滤器达到预设压差0.10 MPa的时间越短;所有试验条件下,水头损失随过滤时间的推移经历保持不变、逐渐减少和急剧增大3个不同的变化阶段。【结论】鱼雷部件在延长过滤时间方面起到重要的作用;鱼雷网式过滤器的冲洗预设压差值调节为0.04 MPa最宜。
【Objective】The purpose of this paper is to study the head loss across the torpedo screen filter and the associated filtration time.【Method】Experiments was carried out using a muddy water at constant sediment content and constant flow.【Result】Under constant sediment content, the time it took the head loss to stabilize increased as the flow rate increased from 240 m3/h to 300 m3/h, while decreased for flow rate between 300~360 m3/h. Under constant flow condition, the time it took the pressure drop to reach △p=0.10 MPa decreased as the sediment content increased. With the change in filtration time, the head loss experienced three different stages: remaining constant, gradually decreasing followed by a sharp rise.【Conclusion】Torpedo plays an important role in prolonging the filtration time, and the appropriate preset pressure for the torpedo screen filter was 0.04 MPa.
【Objective】The purpose of this paper is to study the head loss across the torpedo screen filter and the associated filtration time.【Method】Experiments was carried out using a muddy water at constant sediment content and constant flow.【Result】Under constant sediment content, the time it took the head loss to stabilize increased as the flow rate increased from 240 m3/h to 300 m3/h, while decreased for flow rate between 300~360 m3/h. Under constant flow condition, the time it took the pressure drop to reach △p=0.10 MPa decreased as the sediment content increased. With the change in filtration time, the head loss experienced three different stages: remaining constant, gradually decreasing followed by a sharp rise.【Conclusion】Torpedo plays an important role in prolonging the filtration time, and the appropriate preset pressure for the torpedo screen filter was 0.04 MPa.
引文
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[2]王新坤,许颖,涂琴.微灌系统过滤装置优化选型与配置[J].农业工程学报,2011,27(10):160-163.
[3]张文正,翟国亮,吕谋超,等.微灌条件下三种过滤器过滤效果试验研究[J].灌溉排水学报,2017,36(4):88-93.
[4]YURDEM H,DEMIR V,DEGIMENCIOGLU A.Development of a mathematical model to predict clean water head losses in hydrocyclone filters in drip irrigation systems using dimensional analysis[J].Biosystems Engineering,2010,105(4):495-506.
[5]MARTíP,SHIRI J,DURAN-ROS M,et al.Artificial neural networks vs.Gene Expression Programming for estimating outlet dissolved oxygen in micro-irrigation sand filters fed with effluents[J].Computers&Electronics in Agriculture,2013,99(7):176-185.
[6]WU Wenyong,CHEN Wei,LIU Honglu,et al.A dimensional analysis model for the calculation of head loss due to disc filters in drip irrigation systems[J].Irrigation and Drainage,2014,63(3):349-358.
[7]阿力甫江·阿不里米提,虎胆·吐马尔白,木拉提·玉赛音,等.微灌鱼雷网式过滤器全流场数值模拟[J].农业工程学报,2017,33(3):107-112.
[8]阿力甫江·阿不里米提,阿不都热合曼·尼亚孜.8寸鱼雷除砂网式全自动冲洗过滤器:CN104623957A[P].2015-05-20.
[9]阿力甫江·阿不里米提,陶洪飞,马英杰,等.不同出水口位置下全自动鱼雷网式过滤器内部流场的数值模拟[J].灌溉排水学报,2015,34(12):47-51.
[10]阿力甫江·阿不里米提,虎胆·吐马尔白,木拉提·玉赛音,等.清水条件下鱼雷网式过滤器水头损失试验研究[J].灌溉排水学报,2018,37(2):64-71.
[11]阿力甫江·阿不里米提,虎胆·吐马尔白,马合木江·艾合买提,等.直冲洗鱼雷网式过滤器内流场的数值模拟[J].节水灌溉,2014(10):6-10.
[12]宗全利,郑铁刚,刘焕芳,等.滴灌自清洗网式过滤器全流场数值模拟与分析[J].农业工程学报,2013,29(16):57-65.
[13]宗全利,刘飞,刘焕芳,等.大田滴灌自清洗网式过滤器水头损失试验[J].农业工程学报,2012,28(16):86-92.
[14]刘焕芳,王军,胡九英,等.微灌用网式过滤器局部水头损失的试验研究[J].中国农村水利水电,2006(6):57-60.