污水处理厂脱氮生物滤池的自动控制方法研究

Research on Automatic Control Method of Nitrogen Removal Biofilter in Wastewater Treatment Plant

污水处理厂通常在二级生物池后增加高效沉淀池与脱氮生物滤池以进行提标改造,从而达到出水A级排放标准的目的。结合某污水处理厂脱氮生物滤池的工程实践,对滤池的全自动生产控制进行了研究,提出了一种自动控制方法。首先,采用时序顺控法实现反冲洗控制流程,以满足全工艺自动化要求。其次,采用冒泡法实现优先级选择,解决了控制模式单一的问题。最后,设计了滤池构筑物三维图作为终端界面辅助,增强了上位机系统的可读性。该方法在传统的自控方案上作了一定的优化,使滤池可在多种控制模式下运行,达到全自动与可视化运行的水平。该方法不仅可以为水厂运营减少人力成本,还可以为其他滤池模型的自控专业与工艺研究人员提供参考。

Wastewater treatment plants usually add high-efficiency sedimentation tanks and nitrogen removal biofilter after the secondary biological tanks to carry out upgrading and reforming,and to achieve the purpose of effluent class A discharge standard.Combined with the engineering practice of nitrogen removal biofilter in a wastewater treatment plant,the fully automatic production control of the filter tank is studied,and an automatic control method is proposed.Firstly,the backwashing control process is realized by using the time-sequence down-control method to meet the full process automation requirements.Secondly,the bubbling method is used to realize the priority selection,which solves the problem of single control mode.Finally,a three-dimensional diagram of the filter structure is designed as a terminal interface aid,which enhances the readability of the upper computer system.The method makes some optimization on the traditional automatic control scheme,so that the filter tank can be operated in multiple control modes to achieve the level of fully automatic and visualized operation.This method can not only reduce the labor cost for water plant operation,but also provide a reference for automatic control professionals and process researchers of other filter tank models.