氧化沟内推进器数量对污水流速的影响  

Effect of Propeller Number on Flow Velocity in Oxidation Ditch

作　　者：孙晓杰[1] 周洪涛[1] 魏玮[1] 王敦球[1] 魏建文[1] 朱义年[1] 

机构地区：[1]桂林理工大学环境科学与工程学院广西环境工程与保护评价重点实验室,广西桂林541004

出　　处：《中国给水排水》2013年第9期84-86,共3页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07317-02);教育部新世纪优秀人才支持计划项目(NCET-08-0649)

摘　　要：对桂林市七里店污水处理厂氧化沟的流速进行现场测试,探讨了推进器台数、沟深对流速的影响。结果表明,流速的空间分布特征受推进器的开启数量影响显著,使用6台以下(含6台)推进器时水流速度(<0.25 m/s)无法满足要求,使用7台以上(含7台)推进器时水流速度(>0.25 m/s)可以满足要求。为防止个别推进器发生故障影响推流效果,氧化沟采用8台推进器。推进器的改造优化对降低氧化沟能耗有显著效果,改造后每天节能151.89 kW.h,每月节约电费约0.33万元。The flow velocity in an oxidation ditch at Qilidian WWTP in Guilin was measured in the field. The effects of propeller number and ditch depth on flow velocity were discussed. The dimensional distribution of flow velocity was affected markedly by the number of operating propellers. The flow veloci- ty was 〈 0.25 m/s when six or less propellers were opened. The flow velocity was 〉 0.25 m/s when seven or more propellers were opened. Eight propellers should be installed in oxidation ditch to ensure the plug-flow efficiency is maintained when a propeller malfunctions. The propeller optimization signifi- cantly reduced the energy consumption of the oxidation ditch. Daily energy saving was 151.89 kW · h, and monthly electricity saving was about 3 300 yuan after the optimization.

关 键 词：推进器 氧化沟 流速 

分 类 号：X703[环境科学与工程—环境工程]