摘要
【目的】探索玻璃球滤料在微灌过滤器上的过滤效果。【方法】通过设置不同梯度的初始过滤速度及浑水质量分数,分析了在不同的初始过滤速度和浑水质量分数条件下对过滤出水浊度、过滤出水瞬时流量及玻璃球滤料滤层进出口压降的影响。【结果】在过滤速度为0.015 m/s时,过滤浑水质量分数的提高对其滤后水的浊度影响较大,当过滤速度为0.020、0.025和0.030 m/s时,过滤浑水质量分数的提高对滤后水初始浊度影响较大,对后续过滤出水浊度影响效果不显著。在同一种浑水质量分数条件下,随着初始过滤流速的增大,过滤瞬时流量在一个过滤周期内的减少量依次增大;在同一种初始过滤流速条件下,随着过滤浑水质量分数的增加,过滤瞬时流量在一个过滤周期内的减少量也随之增加。在同一初始过滤流速条件下,滤层进出口压降随着过滤浑水质量分数的增大而增大。【结论】玻璃球滤料对于杂质颗粒的过滤在过滤初期第一阶段以拦截为主,随着过滤的进行浑水的过滤出水浊度、过滤出水瞬时流量、进出口压差趋于稳定,此时过滤进入第二阶段,对于浑水中杂质颗粒的过滤以拦截及填充在滤料之间的杂质颗粒的吸附作用为主。
【Objective】This paper is to examine the feasibility of using micro glass beads as micro-irrigation filter.【Method】We experimentally studied the impact of different initial filtration rates and sediment concentrations on instant effluent flow rate, pressure drop between the inlet and outlet of the filter, and turbidity of the effluent.【Result】When the initial filtration velocity was 0.015 m/s, an increase in sewage concentration had a significant effect on effluent turbidity. When the filtering speeds were 0.020 m/s, 0.025 m/s and 0.030 m/s, an increase in sewage concentration had a noticeable effect on the effluent turbidity in the early stage. Under the same sewage concentration, an increase in initial filtration velocity increased the instant effluent flow rate in a filtration cycle, while under the same initial filtering velocity, an increase in sewage concentration increased the amount of effluent flow rate in one filtration cycle. Under the same filtration velocity, the pressure drop between the inlet and outlet of the filter increased with the sewage concentration. With the filtration flow rate increasing, the pressure drop across the filter decreased as seepage concentration decreased.【Conclusion】The glass beads purified water mainly by intercepting solid particles in the early stage. With the accumulation of the particles in the filter, the effluent turbidity,instant flow rate of the effluent, and the pressure drop across the filter were stabilized, after which the filter purified the water mainly by interception and adsorption.
作者
赵朋飞
翟国亮
邓忠
蔡九茂
张文正
ZHAO Pengfei;ZHAI Guoliang;DENG Zhong;CAI Jiumao;ZHANG Wenzheng(Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Water-saving Agriculture of Henan Province, Xinxiang 453002, China;G-raduate School of Chinese Academy of Agricultural Sciences, Beijing 100081,China;Key Laboratory of Water-saving Irrigation Project, Ministry of Agriculture, Xinxiang 453002, China)
出处
《灌溉排水学报》
CSCD
北大核心
2018年第4期65-70,共6页
Journal of Irrigation and Drainage
基金
中央级科研院所基本科研业务费专项(中国农业科学院农田灌溉研究所)(FIRI2017-27)
中国农业科学院基本科研业务费专项院级统筹项目(Y2017XM08)
关键词
玻璃球滤料
过滤器
过滤速度
压降
glass microspheres
filter
filtration velocity
pressure drop
