基于PLC的MBR小型污水处理工艺的自动控制系统设计

本设计以沈阳市某污水处理及中水回用设施的控制系统为研究背景,结合污水处理工艺,探讨以日本三菱公司的FX2N系列的PLC在采用膜生物反应器(MBR)工艺的小型污水处理设施中的应用,重点阐述了系统的硬件构成及系统软件的设计思路,具有自动/手动两种工作模式,根据气水比比值以及自吸泵占空比确定鼓风机曝气启动时间,鼓风机自动定时...

Autocontrol System Design for MBR Small-Sized Wastewater Treatment Process on the Basis of PLC

In the article,the control system for a certain wastewater treatment and reclaimed water reuse facility in Shenyang is taken as research background.With regard to the wastewater treatment process,application of FX2N series of PLC produced by Mitsubishi Japan in the small-sized wastewater treatment system by adoption of MBR technique is developed,with focus on illustration of the design principles for the hardware composition and system software,with two working modes of automatic and manual functions.According to the values of gas-water ratio and self-priming pump duty cycle,the start-up time for the blower aeration is identified.The blower is operated in an intermittent manner with automatic timing.Ultraviolet disinfection technology is also integrated.As a result,the small-sized wastewater treatment and reclaimed water reuse system is controlled automatically.