Mechanism and Anti-clogging of Labyrinth-channel Emitters under Fluctuated Water Pressure
-
摘要: 为缓解浑水灌溉中滴头堵塞的问题，评估了3种水压模式(恒定水压、台阶波形水压、三角函数波形水压)对滴头堵塞的控制效果，并对不同水压模式下滴头内堵塞物质、滴头排出物质的级配和粒径进行分析。结果表明：动态水压处理滴头使用寿命延长了79.06%,滴头抗堵塞性能优于恒定水压处理；波形对滴头抗堵塞性能影响较小，两种不同波形动态水压处理滴头的使用寿命仅相差2.77%。动态水压处理流道内水流紊动剧烈，能更好地移除沉积、附着在迷宫流道内的堵塞物质，与恒压处理相比，滴头内黏粒、粉粒堵塞物质分别减少了22.19%～36.75%和13.22%～25.06%。动态水压处理下滴头排出泥沙的粒径增大，最大粒径比恒定水压处理增大了44.34%,动态水压处理迷宫流道内水流流线时刻发生变化，水流的挟沙能力增强，大颗粒泥沙更容易从滴头排出。Abstract: The clogging of emitter is one of the bottlenecks restricting the application and popularization of drip irrigation technology. Fluctuated water pressure was adopted to alleviate the problem of emitter clogging inwater with high sediment load.The control effect of three water pressure patterns（constant water pressure, step wave water pressure, trigonometric function wave water pressure） on the clogging of the emitter was evaluated, and the particle size characteristics of clogging substance in emitters and particle size gradation of the substance discharged from emitters under different pressure patterns were analyzed. The results showed that the anti-clogging performance of emitters under fluctuated water pressure treatment was better than that under constant water pressure, and the service life of emitters under fluctuated water pressure emitter was extended by 79.06%, while the waveform change of fluctuated water pressure had little effect on the anti-clogging performance of emitters, and the effective irrigation times provided by emitters under two different waveform of fluctuated water pressure were only 2.77% separated, under fluctuated water pressure treatment, the water flow in the labyrinth channel was violently turbulent, and the sand-carrying capacity of the water flow was enhanced, so that clogging substances deposited and attached to the labyrinth channel can be better removed, compared with the constant water pressure, the content of clay and silt in the emitter clogging substance was decreased by 22.19%～36.75% and 13.22%～25.06%, respectively. In addition, the particle size of emitter under fluctuated pressure was greater than that under constant pressure, and the maximum particle size of the sediment discharged from the emitter under the fluctuated pressure was 54.24 μm. which was increased by 44.34% compared with that under constant water pressure.
-
-
[1] LI Y K,LIU Y Z,LI G B,et al.Surface topographic characteristics of suspended particulates in reclaimed wastewater and effects on clogging in labyrinth drip irrigation emitters[J].Irrigation Science,2012,30(1):43-56.
[2] LIU H,HUANG G.Laboratory experiment on drip emitter clogging with fresh water and treated sewage effluent[J].Agricultural Water Management,2009,96(5):745-756.
[3] 温圣林,牛文全,邬梦龙,等.浑水滴灌过程中不同类型滴头堵塞的动态变化特征[J].农业机械学报,2020,51(3):287-294.WEN Shenglin,NIU Wenquan,WU Menglong,et al.Dynamic characteristics of different emitters clogging in drip irrigation with muddy water[J].Transactions of the Chinese Society for Agricultural Machinery,2020,51(3):287-294.(in Chinese) [4] DURAN-ROS M,PUIG-BARGUÉS J,ARBAT G,et al.Performance and backwashing efficiency of disc and screen filters in microirrigation systems[J].Biosystems Engineering,2009,103(1):35-42.
[5] 牛文全,张二信,吕畅,等.不同加气和粒径条件下浑水滴灌滴头堵塞特性研究[J].农业机械学报,2021,52(11):144-152.NIU Wenquan,ZHANG Erxin,LÜ Chang,et al.Clogging characteristics of muddy drip irrigation dripper under different aeration and particle size conditions[J].Transactions of the Chinese Society for Agricultural Machinery,2021,52(11):144-152.(in Chinese) [6] JOSEP B,JAUME P B,GERARD A,et al.Development of a new underdrain for improving the efficiency of microirrigation sand media filters[J].Agricultural Water Management,2017,179:296-305.
[7] 陶洪飞,杨海华,马英杰,等.流量对河水滴灌重力沉沙过滤池内流速分布的影响[J].农业工程学报,2017,33(1):131-137.TAO Hongfei,YANG Haihua,MA Yingjie,et al.Influence of flow rate on flow velocity distribution in gravity sinking and filter tank for drip irrigation with river water[J].Transactions of the CSAE,2017,33(1):131-137.(in Chinese) [8] 张俊,赵万华,粟晓玲,等.微灌长流道滴头结构特性的研究综述[J].农业工程学报,2005,21(1):182-185.ZHANG Jun,ZHAO Wanhua,SU Xiaoling,et al.Review of structural characteristics analysis of the long-path emitters for microirrigation[J].Transactions of the CSAE,2005,21(1):182-185.(in Chinese) [9] WANG Z,YANG X,LI J.Effect of phosphorus-coupled nitrogen fertigation on clogging in drip emitters when applying saline water[J].Irrigation Science,2020,38(1):1-15.
[10] USTUN S,TALIP T,SEÇKIN E.Evaluation of CaCO3 clogging in emitters with magnetized saline waters[J].Desalination and Water Treatment,2012,40(1):168-173.
[11] ZHOU B,LI Y,SONG P,et al.Anti-clogging evaluation for drip irrigation emitters using reclaimed water[J].Irrigation Science,2017,35(3):181-192.
[12] ADIN A,ALON G.Mechanisms and process parameters of filter screens[J].Journal of Irrigation & Drainage Engineering,1986,112(4):293-304.
[13] YU L,LI N,LIU X,et al.Influence of flushing pressure,flushing frequency and flushing time on the service life of a labyrinth-channel emitter[J].Biosystems Engineering,2018,172(4):154-164.
[14] PUIGBARGUÉS J,LAMM F R.Effect of flushing velocity and flushing duration on sediment transport in microirrigation driplines[J].Transacions of the ASABE,2013,56(5):1821-1828.
[15] TAYLOR H D,BASTOS R,PEARSON H W,et al.Drip irrigation with waste stabilisation pond effluents:solving the problem of emitter fouling[J].Water Science and Technology,1995,31(12):417-424.
[16] 仵峰,范永申,李辉,等.地下滴灌滴头堵塞研究[J].农业工程学报,2004,20(1):80-83.WU Feng,FAN Yongshen,LI Hui,et al.Clogging of emitter in subsur-face drip irrigation system[J].Transactions of the CSAE,2004,20(1):80-83.(in Chinese) [17] ADIN A,SACKS M.Dripper-clogging factors in wastewater irrigation[J].Journal of Irrigation and Drainage Engineering,1991,117(6):813-827.
[18] 魏正英,唐一平,温聚英,等.滴头微细流道水沙两相流分析和微PIV及抗堵实验研究[J].农业工程学报,2008,24(6):1-9.WEI Zhengying,TANG Yiping,WEN Juying,et al.Two-phase flow analysis and experimental investigation of micro-PIV and anti-clogging for micro-channels of emitter[J].Transactions of the CSAE,2008,24(6):1-9.(in Chinese) [19] 喻黎明,梅其勇.迷宫流道滴头抗堵塞设计与PIV试验[J].农业机械学报,2014,45(9):155-160.YU Liming,MEI Qiyong.Anti-clogging design and experimental investigation of PIV for labyrinth-channel emitters of drip irrigation emitters[J].Transactions of the Chinese Society for Agricultural Machinery,2014,45(9):155-160.(in Chinese) [20] WEI Q,SHI Y,DONG W,et al.Study on hydraulic performance of drip emitters by computational fluid dynamics[J].Agricultural Water Management,2006,84(1-2):130-136.
[21] 王聪,芦刚,刘洁,等.波动水压滴灌系统设计与实验分析[J].中国农村水利水电,2012,1(6):69-72.WANG Cong,LU Gang,LIU Jie,et al.Design of dynamic pressure drip irrigation system and experimental analysis[J].China Rural Water & Hydropower,2012,1(6):69-72.(in Chinese) [22] 曹蒙,魏正英,葛令行,等.滴头壁面形貌对微颗粒与壁面黏附特性的影响[J].西安交通大学学报,2009,43(9):120-124.CAO Meng,WEI Zhengying,GE Lingxing,et al.Influence of emitter's channel wall topography on particle-wall adhesion[J].Journal of Xi'an Jiaotong University,2009,43(9):120-124.(in Chinese) [23] ZHANG L,WU P,ZHU D,et al.Effect of pulsating pressure on labyrinth emitter clogging[J].Irrigation Science,2017,35(4):267-274.
[24] 喻黎明,徐霞,杨启良,等.滴灌滴头迷宫流道结构对泥沙运动的影响[J].农业机械学报,2017,48(2):255-261.YU Liming,XU Xia,YANG Qiliang,et al.Influence of geometrical parameters of labyrinth passage of drip irrigation emitter on sand movement[J].Transactions of the Chinese Society for Agricultural Machinery,2017,48(2):255-261.(in Chinese) [25] 赵彤.引黄灌区泥沙处理研究[J].现代农业科技,2013(4):201-202.ZHAO Tong.Study on sediment control in Yellow River irrigation district[J].Modern Agricultural Science and Technology,2013(4):201-202.(in Chinese) [26] GOLDBERG D,GORNAT B,RIMON D.Drip irrigation:principles,design and agricultural practices[J].Drip Irrigation Principles Design & Agricultural Practices,1976,296:273-289.
[27] 牛文全,刘璐.浑水泥沙粒径与含沙量对迷宫流道堵塞的影响[J].排灌机械工程学报,2011,29(6):547-552.NIU Wenquan,LIU Lu.Influence of muddy water concentration and particle diameter on clogging of labyrinth channels[J].Journal of Drainage and Irrigation Machinery Engineering,2011,29(6):547-552.(in Chinese) [28] ISO.Agricultural irrigation equipment-emitters and emitting pipe-specification and test methods:ISO 9261[S].Geneva,Switzerland,2004.
[29] 郑超,吴普特,张林,等.不同动态水压模式下迷宫流道内颗粒物运动特性研究[J].农业机械学报,2017,48(3):294-301.ZHENG Chao,WU Pute,ZHANG Lin,et al.Particle movement characteristics in labyrinth channel ender different dynamic water pressure modes[J].Transactions of the Chinese Society for Agricultural Machinery,2017,48(3):294-301.(in Chinese) [30] LI Q,SONG P,ZHOU B,et al.Mechanism of intermittent fluctuated water pressure on emitter clogging substances formation in drip irrigation system utilizing high sediment water[J].Agricultural Water Management,2019,215(9):16-24.
[31] 葛令行,魏正英,曹蒙,等.微小迷宫流道中的沙粒沉积规律[J].农业工程学报,2010,26(3):20-24.GE Lingxing,WEI Zhengying,CAO Meng,et al.Deposition law of sand in labyrinth-channel of emitter[J].Transactions of the CSAE,2010,26(3):20-24.(in Chinese) [32] DURANROS M,PUIGBARGUÉS J,ARBAT G,et al.Effect of filter,emitter and location on clogging when using effluents[J].Agricultural Water Management,2009,96(1):67-79.
[33] LI N,KANG Y,LI X,et al.Lateral flushing with fresh water reduced emitter clogging in drip irrigation with treated effluent[J].Irrigation Science,2019,37(5):1-9.
[34] KOU B Q,CAO Y X,LI J D,et al.Granular materials flow like complex fluids[J].Nature,2017,551:360-363.
[35] 吴泽广,张子卓,张珂萌,等.泥沙粒径与含沙量对迷宫流道滴头堵塞的影响[J].农业工程学报,2014,30(7):99-108.WU Zeguang,ZHANG Zizhuo,ZHANG Kemeng,et al.Influence of particle size and concentration of sediment on clogging of labyrinth channels emitters[J].Transactions of the CSAE,2014,30(7):99-108.(in Chinese) [36] 王心阳,王文娥,胡笑涛,等.泥沙粒径及压力对滴头抗堵塞性能的影响[J].节水灌溉,2014(10):18-21.WANG Xinyang,WANG Wene,HU Xiaotao,et al.Influences of particle diameter and inlet pressure on emitter clogging[J].Water Saving Irrigation,2014(10):18-21.(in Chinese) [37] 郑超,吴普特,张林,等.动态水压下迷宫流道水流运动特性研究[J].农业机械学报,2015,46(9):167-172.ZHENG Chao,WU Pute,ZHANG Lin,et al.Flow characteristics in labyrinth channel under dynamic water pressure[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(9):167-172.(in Chinese)
计量
- 文章访问数: 0
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
