水厂絮凝沉淀池精准排泥控制系统的研发

Research and Development of Precise Sludge Discharge Control System for Flocculation&Sedimentation in Waterworks

针对水平管絮凝沉淀池难以精准排泥的问题,研制了一种多参数精准排泥控制系统,以泥位检测传感器、控制器和执行器为系统核心,对沉淀工艺过程参数进行优化,形成闭环控制系统,实现沉淀池排泥的智能控制。该控制系统在某中水回用工程的水平管絮凝沉淀池进行了系统测试分析和应用,取得了较好的排泥效果,沉淀池出水浊度能长期稳定在2.0 NTU以下。与传统排泥方式相比,节省水耗47.4%;单个排泥阀月动作次数减少29次,避免了沉淀池积泥现象,具有提升沉淀出水水质、降低能耗、减轻人工操作强度等优点。

A multi‑parameter precise sludge discharge control system was developed,aiming at the difficulty of precise sludge discharge control in a horizontal tube flocculation sedimentation tank.With the sludge level detection sensor,controller and actuator as the core of the system,parameters of the sedimentation process were optimized to develop a closed‑loop control system and realize intelligent control of sludge discharge in sedimentation tank.The control system has been tested,analyzed and applied in the horizontal tube flocculation sedimentation tank of a reclaimed water project and achieved good sludge discharge effect.The effluent turbidity in sedimentation tank can be stabilized below 2.0 NTU for a long time.The water consumption can be saved by 47.4%,compared with the traditional sludge discharge method.And the monthly operation times of single sludge discharge valve were reduced by 29 times,which avoids sludge accumulation in the sedimentation tank,and has the advantages of improving effluent quality,saving energy and reducing manual operation.