复合沉淀池的衍变及工程应用

Development and Engineering Application of Composite Sedimentation Tank

结合实际工程应用项目,介绍了复合沉淀池的衍变及运行效果。复合沉淀池是平流沉淀池和斜管沉淀池的优化组合,首先在斜管沉淀池前增设一段12~25m长的平流沉淀池,不仅使大量矾花与泥渣在前端平流段沉淀,从而降低斜管沉淀池的泥量负荷,而且使位于复合沉淀池后部的斜管沉淀池前端不再积泥。其次,通过在池底配置刮泥小车、结合上向流排泥管沉淀池技术彻底解决了沉淀池排泥不畅的问题。复合沉淀池特别适用于冬季低温低浊、夏季高浊的水厂,具有结构简单、适用性强、降低运行成本、节省占地及投资等优势。

With the actual projects,this paper introduces the development and operation effect of the composite sedimentation tank.The composite sedimentation tank is a combination of the horizontal flow sedimentation tank and the tube settler.A horizontal flow sedimentation tank with the length of 12-25 m is set in front of the tube settler.As a result,a large amount of aluminum flocs and sludge are precipitated in front of the horizontal flow sedimentation tank,which reduces the sludge loading rate of the tube settler and avoids sludge accumulation in front of the tube settler.By setting up a mud scraper at the bottom of the sedimentation tank and combining with the tube settler technology,the problem of poor sludge discharge in the sedimentation tank is completely solved.The composite sedimentation tank was especially suitable for water quality with low-temperature and low-turbidity in winter,also for high-turbidity in summer,which has the advantages of simple structure,strong applicability,low operation cost,saving land occupation and investment.