基于沉后水浑浊度优化目标的中小型水厂侧向流斜板沉淀池改造  

Reconstruction of Side Flow Lamella Sedimentation Tank in Medium and Small Scale WTPs Based on Settled Water Turbidity Optimization

作　　者：董志锋 刘倩 范漳 林佳玲 曾威龙 DONG Zhifeng;LIU Qian;FAN Zhang;LIN Jialing;ZENG Weilong(Shenzhen Henggang Water Supply Co.,Ltd.,Shenzhen 518115,China;Shenzhen Longgang Water Group Co.,Ltd.,Shenzhen 518172,China)

机构地区：[1]深圳市横岗自来水有限公司,广东深圳518115 [2]深圳市龙岗水务集团有限公司,广东深圳518172

出　　处：《净水技术》2023年第6期199-204,共6页Water Purification Technology

摘　　要：针对深圳某水厂斜管沉淀池沉淀效果差、排泥不畅、沉后水浑浊度偏高,最终导致滤池过滤周期短、滤后水及出厂水浑浊度偏高等问题,将斜管沉淀池改造为A型侧向流斜板沉淀池。改造并优化完成后,沉淀池空间利用率更高,运行更加平稳,对原水水质波动的抗冲击能力也有一定提升。对比相同工艺改造前后的水质效果,发现经过改造优化后,因进水导流区及运行死角的消除,沉淀池运行有效容积由74.1%提升至100.0%,沉后水平均浑浊度下降26%,平均值在0.51 NTU,滤后水平均浑浊度下降19%,平均值为0.13 NTU。运行结果表明,A型侧向流斜板沉淀池改造效果显著,适用于存在相似问题的中小型水厂。In view of the problems of poor sedimentation effect,poor sludge discharge and high turbidity of settled water in the inclined tube sedimentation tank of a water treatment plant(WTP)in Shenzhen,which eventually led to short filtration cycle of the filter tank and high turbidity of filtered water and effluent,the inclined tube sedimentation tank is transformed into A-type side flow lamella sedimentation tank.After the transformation and optimization,the space utilization rate of the sedimentation tank is higher,the operation is more stable,and the impact resistance to the fluctuation of raw water quality is also improved to a certain extent.Comparing the water quality effects before and after the transformation of the same process,it is found that after the transformation and optimization,due to the elimination of the inlet diversion area and the dead angle of operation,the effective volume of the sedimentation tank is increased from 74.1%to 100.0%,the turbidity of settled water is reduced by 26%,stabilized at about 0.5 NTU,and the turbidity of the filtered water is reduced by 19%,stabilized at about 0.13 NTU.The practice results show that the transformation effect of A-type side flow lamella sedimentation tank is remarkable,and it is suitable for small and medium-sized WTPs with similar problems.

关 键 词：侧向流斜板沉淀池 有效容积 出水浑浊度 斜板除泥装置 浑浊度 

分 类 号：TU991[建筑科学—市政工程]