摘要
为了探求氧化沟内流速分布规律,解决积泥问题并实现系统能量的优化配置,以重庆市某污水处理厂的A/A/O氧化沟为试验平台,根据曝气转盘及水下推流器的不同组合方式设计了3种试验工况,重点对氧化沟外沟大弯段处的流速分布进行了测试及分析。结果表明:第1沟段下部流速过大容易造成能量浪费,间歇开/停水下推流器可以优化系统的能量配置;第2沟段水力情况复杂,外侧流速高、内侧流速低,形成了明显的滞水区,造成了内侧部分区域积泥;提出了解决积泥问题的措施,即在第2沟段的弯道处加设偏心导流墙、调整水下推流器的位置。
To study the velocity distribution rule,the sludge deposition and the energy-optimized distribution of the oxidation ditch,the experiment was processed in a WWTP with A/A/O Oxidation Ditch technology.The study individually focused on the velocity distribution of curved sections in out-ditch by testing three operation conditions of the Oxidation Ditch.The result shows： firstly,the velocity of the first ditch is too large;easily lead to waste of energy,intermittent on/off submerged flow drivers can optimize the energy distribution of the system.Secondly,in the second ditch,the flow pattern in crook ditches were very complex,there existed high velocity outside and low inside.For such situation,it is easy to cause sludge deposit in the inside of the ditch.Finally,in order to improve the problem of sludge deposition,the measures were put forward as follows： installing off-center training in curved sections of the second ditch,adjusting the position of submerged flow driver.
出处
《土木建筑与环境工程》
CSCD
北大核心
2011年第1期118-123,共6页
Journal of Civil,Architectural & Environment Engineering
基金
国家“水体污染控制与治理”科技重大专项(2009ZX07315-002-01)
重庆大学研究生科技创新基金项目(CDJXS11210001)
关键词
氧化沟
流态
积泥
节能降耗
Oxidation Ditch
flow patterns
sludge deposition
energy saving and consumption reduction
