排灌机械工程学报
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排灌机械工程学报  2011, Vol. 29 Issue (6): 547-552    DOI: 10.3969/j.issn.1674—8530.2011.06.017
节水灌溉工程 最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |   
浑水泥沙粒径与含沙量对迷宫流道堵塞的影响
牛文全1,2, 刘璐1,3
(1.中国科学院水利部水土保持研究所, 陕西 杨凌 712100; 2.西北农林科技大学水土保持研究所, 陕西 杨凌 712100; 3.中国科学院研究生院, 北京 100049)
Influence of muddy water concentration and particle diameter on clogging of labyrinth channels
Niu Wenquan1,2, Liu Lu1,3
(1.Institute of Soil and Water Conservation, Chinese Academy of Sciences/Ministry of Water, Yangling,  Shaanxi 712100, China; 2.Institute of Soil and Water Conservation, Northwest A&F University, Yangling,  Shaanxi 712100, China; 3.Graduate University of Chinese Academy of Sciences, Beijing 100049, China)
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摘要 为客观评价浑水中泥沙特性对滴头流道堵塞的影响以及合理选择滴灌水质处理方法,采用L (3 )的正交试验设计方法,进行了浑水间歇灌水测试,并提出了以滴头平均相对流量和灌水均匀度系数作为基本参数的滴头堵塞程度综合评价方法,比较分析了压力、含沙量以及泥沙粒径等变化对滴头堵塞比例和堵塞程度的影响规律.研究结果表明:对于粒径小于0.1 mm的泥沙颗粒,工作压力对流道堵塞的影响非常显著,其次为泥沙粒径;滴头堵塞程度的大小是由粒径、含沙量、工作压力三者相互耦合作用引起的,且相互之间不存在单调相关关系.在实际灌水过程中,当灌溉水中含有较多小于0.1 mm的泥沙颗粒时,应尽量滤除粒径小于0.048 mm的颗粒,并可加入分散剂,阻止细小黏粒的团聚絮凝作用,以提高滴头抗堵塞能力.
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牛文全
刘璐
关键词迷宫流道   颗粒物质   堵塞   含沙量   粒径     
Abstract: A better understanding of the effect of suspended solids characteristics in muddy water on labyrinth path emitters is critical to prevent an emitter from clogging and select an  appropriate water treatment approach in drip irrigation systems.In this study,the impacts of sediment particle size,sediment concentration and inlet pressure on the clogging level of the emitters used in drip irrigation systems  were investigated by means of  intermittent muddy water tests scheduled with the L (3 )orthogonal design table.The clogging level was evaluated with  the  relative average flow rate and irrigation uniformity  coefficient  of flow through an emitter.The result showed that the clogging level is determined by sediment particle size,sediment concentration and inlet pressure,but not monotonically related to a single factor.The clogging level is significantly influenced by the inlet pressure followed by sediment particle size when particle size<0.1 mm.In field irrigation practice,it is recommended to filter the fine sediment particles(<0.048 mm) and add dispersants to inhibit the flocculation of tiny viscous particles and so as to improve the performance of emitters.The findings from this study will help enhance our understanding of the clogging mechanisms of emitters and the use of high sediment water in drip irrigation.
Key wordsabyrinth path   granular matter   clogging   sediment concentration   particle size   
收稿日期: 2011-08-03; 出版日期: 2011-11-30
基金资助:

国家863 计划项目( 2011AA100507)

通讯作者: 牛文全( 1972-),男,甘肃甘谷人,副教授( nwq@ vip.sina.com) ,主要从事灌溉理论与节水技术研究.   
作者简介: 刘璐( 1986-),女,陕西宝鸡人,硕士研究生( luluhuzi@126.com) ,主要从事灌溉理论与节水技术研究.
引用本文:   
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 Wen-Quan,LIU Lu. Influence of muddy water concentration and particle diameter on clogging of labyrinth channels[J]. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(6): 547-552.
 
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