摘要
由于滴灌灌水器流道较小,滴灌系统对水质要求颇高,因此过滤装置在滴灌中非常重要。国内外学者对其进行了大量的研究和研发工作。在此背景下,在简要阐述滴灌用砂石、网式、叠片式和离心式过滤器工作原理的基础上,对滴灌用过滤器的研究现状进行了系统归纳总结,对过滤器研究存在问题和发展趋势进行了讨论。认为目前针对过滤器水头损失和堵塞的变化规律及影响因素的试验研究较多;在建立过滤器水头损失理论计算方程和模型模拟过滤器内部水流流态等方面已引入流体计算模型;而砂石过滤器滤料和滤帽、网式过滤器自清洗装置、叠片式过滤器叠片以及一体式组合过滤器结构的改进等是过滤器研发的热点。研究认为将来过滤器的研究研发工作可重点针对过滤器模拟技术和适应我国国情的过滤器研制等方面展开。本研究可为滴灌用过滤器的研究提供一定的技术支撑。
Due to the small flow channel of emitter,drip irrigation system has a high requirement on water quality,so filter device is very important in drip irrigation.Domestic and foreign scholars have done a lot of research and development work on it.In this context,on the basis of briefly describing the working principles of sand media,screen,disc filters and hydro-cyclone sand separators for drip irrigation,this paper systematically summarizes the research status of filters for drip irrigation,and discusses the existing problems and development trends of filters.The paper holds that there are many experimental studies on the variation law and influencing factors of water head loss and blockage in filters.The fluid calculation model has been introduced in the aspects of establishing the theoretical calculation equation of the filter head loss and simulating the flow pattern inside the filter.And the filter material and filter cap of sand filter,the self-cleaning device of screen filters,the disc of disc filters,the structure improvement of integrated filter are the hot research and development of filters.It is suggested that the research and development of filters in the future can focus on the simulation technology of filters and the development of filters suitable for China's national conditions.This study can provide some technical support for the research of drip irrigation filter.
作者
杜思琦
韩启彪
李盛宝
黄修桥
尚世龙
孙修国
DU Si-qi;HAN Qi-biao;LI Sheng-bao;HUANG Xiu-qiao;SHANG Shi-long;SUN Xiu-guo(Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences/ Key Laboratory of Water-saving Agriculture of Henan Province/ Key Laboratory of Water-saving Irrigation Engineering, Ministry of Agriculture, Xinxiang 453002, Henan Province, China;Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China;College of mechanical& Electrical Engineering of Henan Agricultural University, Zhengzhou 450046, China;Rencheng District Water Bureau of Jining City, Jining 272008, Shandong Province, China)
出处
《节水灌溉》
北大核心
2020年第3期57-61,共5页
Water Saving Irrigation
基金
“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。
关键词
滴灌
过滤器
水头损失
结构优化
drip irrigation
filters
head loss
structure optimization
