微压过滤冲洗池的污物处理能力研究  

Sewage Treatment Capacity of Micro-pressure Filtering and Washing Pool

作　　者：陶洪飞[1] 马英杰[1] 洪明[1] 郑文强[1] TAO Hong-fei MA Ying-jie HONG Ming ZHENG Wen-qiang(College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, Chin)

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052

出　　处：《节水灌溉》2017年第2期39-43,47,共6页Water Saving Irrigation

基　　金：国家科技支撑计划项目(2011Bad29B05);新疆水利水电工程重点学科基金项目(xjslgczdxk20101202)

摘　　要：针对目前处理地表水中污物难的问题,提出了微压过滤冲洗池,并进行了动水试验。试验结果表明:微压过滤冲洗池可以处理泥沙、锯末、树叶、草籽等污物;当含沙量范围为3.1~3.6、13.9~14.4及20.6~21.1 kg/m3时,微压过滤冲洗池的过滤时间分别达到420、60、10 min时开始排污;微压过滤冲洗池的泥沙去除率在80%以上,泥沙粒径范围为0.15~1 mm时,级效率达到100%,中值粒径D50由0.23 mm变为0.058 mm左右,粗端粒径D98由0.97 mm变为0.13 mm左右,从泥沙去除率、级效率、过滤前后的泥沙粒径变化可知,微压过滤冲洗池的污物处理能力很高,过滤后的水满足灌溉需水和水质要求;水箱中的水深随过滤时间的变化规律包含3个阶段,即水深恒定、水深快速增加和水深急速增加阶段。并在试验结果的基础上,对过滤网不易堵塞的机理进行了初步分析。Aiming at the problems of sewage treatment in surface water, a kind of pool of filtering and washing under Micro-pressure （ PF- WMP） is proposed in this paper. Meanwhile, an experimental study is conducted. The results show that： the PFWMP can filter sand, saw dust, leaves, grass seed and other sewage; when the range of sediment concentration is 3.1- 3.6, 13.9-14.4 and 20.6-21.1 kg/m^3, the PFWMP starts blowdown when the filtration time reaches 420, 60 and 10 min, respectively; the sediment removal rate of the PFWMP is over 80%; the stage efficiency is 100% when the sediment particle size is from 0.15 to 0.1 mm; the median diameter D50 turns from 0.23 mm to about 0.058 mm; the D98 turns from 0.97 mm to about 0.13 mm. According to sediment removal rate, stage efficiency and variation of sand diameter, the sewage treatment capacity of PFWMP is very high. The fihered water meets the requirements of irrigation water quality. Water depth variation in the tank along with filtration time contains three stages： constant water depth, water depth rapidly increased and water depth fast increased. In the end, on the basis of the experiment results, the mechanism of not-easy blocking filter screen is preliminarily analyzed.

关 键 词：微压过滤冲洗池 过滤网 含沙量 过滤时间 水深 

分 类 号：S27[农业科学—农业水土工程] TV14[农业科学—农业工程]