用PLC实现加氯串级比值控制

Realization of Chlorine Adding Cascade Ratio Control by PLC

以水厂后加氯自动控制系统为例 ,介绍了由PLC、流量计和余氯检测仪等构成的串级和比值系统的控制原理及系统运行步骤 。

This paper is based on the post chlorine adding control system in water supply plant, the control rule and the procedures of the cascade control system and the ratio control system consisted of PLC flowmeter,superfluous chlorine gauge and other devices are reviewed. The satisfactory control quality of them is also introduced.