摘要
细粒悬移质高含沙浑水对微灌系统的淤堵一直困扰着区域节水灌溉的推行和农业节水能力的提升。以典型的塔里木河高含沙浑水为例,选用5种不同浓度的絮凝剂,以泥沙沉降比、淤积泥沙的体积、上清液浊度、处理成本等参数为指标,应用层次分析法及熵权法耦合得到各参数综合权重,优选去除细粒泥沙的最佳组次。试验结果表明,考虑絮凝沉降效果、絮凝剂成本、泥沙浑浊液的浊度和絮凝物的体积等因素,阴离子聚丙烯酰胺PAM(-)沉降效果最好;泥沙浓度为12%,PAM(-)的添加量为0.01 g/L为试验组次最优。试验结果可为塔河中下游灌区高含沙浑水絮凝沉沙提供参考。
The siltation of micro-irrigation systems by fine-grained overhang,high sediment-content muddy water has always plagued the implementation of regional water-saving irrigation and the improvement of agricultural water-saving capacity.In this paper,five kinds of flocculants with different concentrations were selected for the typical turbid water of the Tarim River.The parameters such as sediment sedimentation ratio SV 30,the volume V 1h of silt sediment,turbidity of supernatant,treatment cost and other parameters were used as indicators,and the analytic hierarchy method and entropy weight method were applied to obtain the comprehensive weight of each parameter.The best group for removing its fine-grained sediment was preferred.The experimental results show that the sedimentation effect of anionic polyacrylamide PAM(-)is the best for considering the factors of flocculation sedimentation effect,flocculant cost,turbidity of sediment turbidity and volume of flocculate;The experimental group was the second optimal when the sediment concentration was 12%and the addition amount of PAM(-)was 0.01 g/L.The test results can provide a reference for the flocculation and sedimentation of high sand content in the middle and lower reaches of the Tahe River irrigation area.
作者
赵蕊婷
严新军
王雪虎
ZHAO Rui-ting;YAN Xin-jun;WANG Xue-hu(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention,Urumqi 830052,China)
出处
《水电能源科学》
北大核心
2024年第7期73-76,67,共5页
Water Resources and Power
基金
自治区重点研发任务专项项目(2022B03024-3)
新疆水利工程安全与水灾害防治重点实验室研究项目(ZDSYS-YJS-2022-09)。
关键词
细粒泥沙
沉降性能
絮凝剂
絮凝沉降
综合权重
fine-grained sediment
sedimentation performance
flocculant
flocculation settlement
comprehensive weight
