圆中环沉沙排沙过滤池过滤和反冲洗效果的试验研究  

Experiment on the filtration and back wash of sediment desilting filter of circular ring

作　　者：张林林[1] 侍克斌[1] 焦文娟[1] 胡浩[1] 

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：《南水北调与水利科技》2015年第4期717-720,746,共5页South-to-North Water Transfers and Water Science & Technology

基　　金：新疆科技支撑计划项目(201233132);新疆水利水电工程重点学科基金资助项目(XJzdxk-2010-02-12)

摘　　要：试验研究了圆中环沉沙排沙过滤池中过滤槽料层针对村镇供水原水粗滤标准设计之后的泥沙过滤性能与过滤周期结束时滤层反冲洗效果。对滤料层优化设计、铺设、试验后发现,当流速为19m/h,进水浊度为50NTU时,滤出水浊度接近0;进水浊度为300NTU时,出水浊度为3NTU;进水浊度为500NTU以下时,出水浊度为5NTU以下,满足村镇供水的源水粗滤标准[7]。过滤槽过流流速在18.75m/h,进水浊度为400NTU左右时,过滤周期达到13h。过滤槽滤层反冲洗6次滤层冲洗干净,上下游水位差恢复到原始状态,耗时15min,耗水率为1.8%。沉沙池内淤沙冲洗和过滤槽内淤沙反冲洗完全利用水流重力冲洗,无需额外电力,用于村镇供水源水粗滤能达到节能、环保、高效的良好效果。The experiment s on the filtration bed in the filter tank of sediment desilting filter of circular ring were conducted to in-vest igate the filtration performance of the filter layer after the design optimizat ion and backwashing effects of the filter layer af-ter the filtration period. Through the pavement and experimentof the filter layer after the design optimization, the results show ed that when the velocity was 19 m/ h and the turbidity of incoming water to be filtered was 50 NTU, the turbidity of efflu-ent was close to 0; when the turbidit y of incom ing water was 300 NTU, the turbidity of effluent was 3 NTU; and when the tur-bidity of incoming water was below 500 NTU, the turbidity of effluent was below 5 NTU, which met the standard of rough fil-tration in the rural wat er supply. Moreover, when the velocity of flow was 18. 75 m/ h, the turbidit y of incoming water to be fil-tered was about 400 NTU, the filtration cycle reached 13 hours. The filter material was clean after six times of backwashing, the difference between upstream and downstream water levels recovered to the original state, filt ration cycle was about 15 minutes, and water consumption rate was 1. 8% . The gravit y of water was applied to flush the silt and sand in the grit chamber and filter tank, and no additional pow er was needed. Therefore, the device achieved the objective of energy saving, environmental protec-tion, and high efficiency when applied to the rough filt ration of rural water supply.

关 键 词：工业用水 粗滤 反冲洗 流量 

分 类 号：TV149.2[水利工程—水力学及河流动力学]