摘 要课题主要通过 PLC 程序仿真对制药废水处理自动化控制，程序具备手动/自动控制功能，实现对提升泵，风机房空压机的变频工频控制，对加药泵，污泥回流泵的智能控制，自动控制过程中，主要是采集 DO 仪检测仪变送回开关量信号，液位仪变送回开关量信号，PH 检测仪开关量信号，实现对空压机、提升泵、加药泵（NaOH）自动控制、空压机运行过程中，通过 PLC 时间控制程序实现对空压机时间的切换。设计中完成了配电系统设计，PLC 控制电路的设计，PLC 控制程序的设计，并进行了程序仿真，通过仿真实现了预期的控制要求。PLC 提高了自动控制的可靠性,不仅减轻了工人的劳动强度,而且提高了制药污水处理的运行效率,实现了污水厂生产管理的科学性。不但使制药公司的污水得到了达标排放，而且一部分污水能得到了循环利用。关键词: 废水处理；自动化控制；PLC 控制AbstractThe topic mainly uses PLC simulation procedure to automatic control pharmaceutical wastewater treatment, procedures have manual / automatic control functions, to achieve lift pump, air compressor in ventilator room frequency conversion and power frequency control, intelligent control the dosing pump and return sludge pump. In the process of automatic control, is mainly to collect DO Meter Tester turned back to the switch signal, liquid level instrument variable back to the switch signal, switch signal of the PH tester , for air compressor, lift pump, dosing pump ( NaOH ) automatic control. In the operation of air compressor, by the PLC time control program to switch air compressor time.Topic design power distribution system , PLC control circuit, PLC program, and carried out the process simulation, by the simulation to achieve the expected control requirements.PLC improves the reliability of automatic control, not only reduces the labor intensity of workers, and improve the pharmaceutical wastewater treatment efficiency, realized sewage factory production management. Not only make the pharmaceu...
