悬锥鳃片在静态浑水中加速泥沙沉降的试验研究  

Experimental research on accelerating sediment settlement by suspension cone-gill flakes in static turbid water

作　　者：蒋岑[1,2] 邱秀云[1,3] 王长新[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]广东惠州粤华电力公司,技术中心,广东惠州516023 [3]新疆农业大学农业节水与水资源研究中心,新疆乌鲁木齐830052

出　　处：《泥沙研究》2010年第3期61-66,共6页Journal of Sediment Research

基　　金：国家自然科学基金(50969009);高等学校埡学科点专项科研基金资助(20070758003)

摘　　要：对"加鳃"与"未加鳃"两装置中在静水中细颗粒泥沙沉降进行了试验,试验表明,悬锥鳃片在静态浑水中能起到加速泥沙沉降的作用。从试验现象及分析来看,"加鳃"装置在泥沙沉降过程中出现了四个不同斜率的曲线段,加速沉降的阶段可分为开始缓慢的前期加速沉降段和后期较快的全面加速沉降段。文章就此现象分析认为细颗粒泥沙在沉降过程中加快出现的絮凝作用是关键因素,其次泥沙的结构特性、水体的水质和形成了异重流等因素也有一定的影响。Some experiments are conducted for fine sediment settling in two devices with and without cone gills in the static turbid water. The experimental results show that the use of suspension cone-gill flakes could accelerate sediment settlement. According to the experimental phenomena, sediment settling has appeared four difference portions in the settling curve by the device with gills. The accelerated settlement can be divided into two stages： the earlier stage of slower-moving accelerated sedimentation and the later stage of faster-allrounding accelerated sedimentation. Through analyzing the settling phenomena of fine sediment in the static surbid water, it can conclude that the flocculation is the key factor in accelerating sediment settlement, and then, the structural characteristics of sediment, water quality, and density flow, etc.

关 键 词：悬锥鳃片 静态浑水 加速沉降 絮凝 异重流 

分 类 号：TV142[水利工程—水力学及河流动力学]