河水滴灌重力沉沙过滤池物理试验研究

Physical Experiment Study on the Gravity Desilting and Filter Basin of River Water Drip Irrigation

农业高效节水技术在新疆地区发展很快,但作为主要供水水源的地表水含沙量较高,影响了该技术的广泛推行。为此,需要研究能有效处理地表水泥沙、满足滴灌水质要求、投资相对较少的除沙装置,河水滴灌重力沉沙过滤池比较好地解决了这一问题。以河水滴灌重力沉沙过滤池为研究对象,通过物理试验研究沉淀池长25 m,侧向溢流堰长分别为5、3、2 m的沉沙过滤池除沙效果,结果表明:在沉淀池长25 m的工况下泥沙总处理效率可达50%以上,侧向溢流堰长度选取3 m比较合适,满足出池水质要求的进口最大含沙量约为1.5 kg/m^3。

Agricultural efficient water saving technology develops very fast in Xinjiang,but as the main water supply source,the fact that sediment concentration of surface water is high affecting the promotion of the technology. So,it＇s necessary to research the bed cleaning device which can treat sediment effectively and meet the requirements of drip irrigation and the investment is relatively lower. The water drip gravity sinking sand filter tank has better solved the above problems. In this paper,we took the gravity desilting and filter basin of river water drip irrigation as the research object and studied the effects of water-sediment separation by the physical experiment,which the settling basin was 25 m long and the lateral overflow weir is 5 m,3 m and 2 m long. The results show that the total processing efficiency of sediment can reach more than 55% under the working condition of the structure and the optimal side weir length is 3 m. The imported maximum sediment concentration is about 1.5 kg/m^3 which meet the pool water quality standard.