机械加速澄清池的沉降比控制原理及应用  

Sludge Volume Control Principle and Application of Mechanical Accelerating Clarifier

作　　者：李礼 杨扬 刘芬 王晶 张磊 LI Li;YANG Yang;LIU Fen;WANG Jing;ZHANG Lei(Beijing Engineering Research Center for Drinking Water Quality, Technology Institute of Beijing Waterworks Group Co. Ltd., Beijing 100192, China)

机构地区：[1]北京市自来水集团有限责任公司技术研究院北京市供水水质工程技术研究中心,北京100192

出　　处：《中国给水排水》2018年第13期53-57,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07108002);2017年度创新基地培育与发展专项(Z171100002217040)

摘　　要：机械加速澄清池的稳定运行依赖于适宜的污泥浓度,操作员一般通过人工读取污泥的沉降比来反映其浓度和总量,沉降比可以作为控制污泥浓度的依据。借助絮体污泥"沉降通量"的概念,对沉降比用于控制污泥浓度的原理进行了分析,论述了如何通过沉降比来控制排泥,以及如何应对生产上的水质与水量冲击。在分析沉降比的控制原理过程中,通过实例中对"沉降通量"的计算,得到"进水量-沉降比关系图",使操作人员可以便捷地找到进水量与沉降比的关系,这为机械加速澄清池的实际运行提供了很好的指导,同时也提供了沉降比作为生产运行控制指标的理论依据。Maintaining optimal sludge concentration is key to the control of the mechanical acceler- ating clarifier. The sludge volume and concentration can be estimated from manually reading the sludge volume. Based on the concept of ＂deposition fluxes＂, the principles of the sludge volume control were analyzed, to demonstrate the control of the sludge discharge through manipulating sludge volume, as well as the strategies towards fluctuating inflow rates. A graph showing the relationship between the inflow rates and the sludge volumes was generated to guide the operation of the clarifier. In addition, the theo- retical basis was provided to support the use of the sludge volume as an indicator in operation.

关 键 词：机械加速澄清池 沉降比 沉降速度 污泥浓度 沉降通量 排泥 

分 类 号：TU991[建筑科学—市政工程]