PLC在D-A^2O组合技术处理橡胶废水中的应用

Application of PLC Control in Treatment of Rubber Wastewater by D-A^2O Combination Technology

为适应水量波动和实现节能的目的,将上海正航CN-200型系列可编程控制器(PLC)引入处理橡胶废水的D-A^2O组合工艺(最大设计处理能力为1 200 m^3/d)。阐述了该处理系统的多种节能运行模式,并结合PLC系统软件自身的特点,设计了一套具有选择性的橡胶废水处理自动化节能运行系统。结果表明,该处理系统可根据实际水量在IDEA工艺、D-A^2O(A/B侧交替运行)工艺和A^2O(A/B侧同时运行)工艺中任意切换。同时,有效解决了由于污水处理系统长时间处于小水量情况下导致过多设备参与运行而造成设备利用率低、能耗浪费等问题,在确保水质达标的前提下实现了污水处理系统的自动化节能运行。

The application of Shanghai Zhenghang CN-200 series programmable logical controller （PLC） in the treatment of rubber wastewater by D-A2O combination technology （the maximum design treatment capacity was 1 200 m3/d） was introduced. Software system was developed through explaining a variety of energy-saving operation modes of the system and combining with the characteristics of the PLC system, and a set of automatic energy-saving operation system with selective function for the treatment of rubber wastewater was designed. The results indicated that the treatment system could be arbitrarily switched among the IDEA process, the D-A2O （A/B side alternative operation） process and the A2O （A/B side simultaneous＂ operation） process according to the actual wastewater amount. Meanwhile, low equipment utilization rate, energy waste and other problems caused by too many devices operated in the system, when the wastewater treatment system was under small amount of wastewater for a long time, were creatively solved, and automatic energy-saving of the wastewater treatment system was realized on the premise of meeting water quality standard.