水厂排泥水系统优化的探讨  

Exploration on Optimization of Sludge Water System in WTP

作　　者：刘辉 顾春平 谈巍 LIU Hui;GU Chunping;TAN Wei(Shanghai Nanhui Water Supply Co.,Ltd.,North Water Plant,Shanghai 201316,China)

机构地区：[1]上海南汇自来水有限公司北水厂,上海201316

出　　处：《净水技术》2025年第4期197-202,共6页Water Purification Technology

摘　　要：【目的】为了解决水厂污泥脱水车间板框压滤机在处理经过浓缩池浓缩后的排泥水时,由于进入板框压滤机的泥水浓度偏低,从而造成产泥效率不佳的问题,并为具有类似工艺且需优化泥线生产环节的水厂提供有效建议和方法。【方法】文章分析了水厂泥线工艺段的主要环节,通过理论公式分析得出提高沉淀池排泥水浓度是解决问题的关键。结合实际工况,文章详细阐述了如何选择合适的仪表,在平流式沉淀池选择恰当的安装位置,以及在浓缩池安装线缆式污泥界面仪的过程。同时,将平流式沉淀池的排泥机从传统的单一往返运行模式调整为根据排泥水浓度动态运行模式,并对浓缩池的排泥频率和排泥时间做出调整。【结果】实践表明,经过上述的优化,进入板框压滤机的泥水含固率由2%稳定提升至5%,单批次板框压滤机的出泥绝干量增加40%,每月浓缩池上清液减量排放约为20000 m^(3)。该系统优化对水线生产无不利影响,退水指标符合上海市《污水综合排放标准》二级标准(DB31/199—2018),具有较好的社会经济效益。【结论】综上所述,通过对水厂泥线的主要环节进行工艺调整,可以使得水厂泥线生产系统稳定高效,浓缩池上清液各项退水指标稳定达标,其减排也大幅降低了厂用水比例,成为水厂节能降耗的重要措施。[Objective]To address the low sludge production efficiency of plate-and-frame filter presses in water treatment plants(WTPs)caused by low sludge concentration from concentration tanks,and to provide effective solutions for optimizing sludge line processes in similar WTPs.[Methods]This paper analyses key stages of the sludge line process,identifying increased sludge concentration from sedimentation tanks as a critical solution.Practical measures included selecting appropriate instruments,optimizing installation locations in horizontal flow sedimentation tanks,and installing cable-type sludge interface meters in concentration tanks.The operation mode of the sludge discharge machine in horizontal flow sedimentation tanks was adjusted from traditional reciprocating to dynamic based on sludge concentration,and discharge frequency and duration in concentration tanks were optimized.[Results]After optimization,the solid content of sludge entering the filter press increased from 2% to 5%,dry sludge output per batch rose by 40%,and monthly supernatant discharge decreased by approximately 20000 m^(3).The system optimization had no adverse effects on water production,with effluent quality meeting Integrated Wastewater Discharge Standard(DB31/199—2018),demonstrating significant social and economic benefits.[Conclusion]By optimizing key processes in the sludge line of WTPs,the sludge production system has achieved stable and efficient operation.The effluent quality of the supernatant from the concentration tank consistently meets discharge standards,while the reduction in emissions significantly lowers the WTP′s water usage ratio.These improvements serve as an important measure for energy conservation and consumption reduction in WTPs.

关 键 词：排泥机 浓缩池 脱水工艺 污泥浓度计 污泥界面仪 

分 类 号：TU991[建筑科学—市政工程]