陶瓷膜中试流程控制系统开发

为了满足新型陶瓷膜中试流程各操作参数处于最优值,在分析陶瓷膜中试流程结构与工作原理的基础上,分别对控制系统总体方案和系统软硬件展开设计。提出采用三回路专家PID控制算法,实现对压差、流量的精确控制。系统由PLC为控制器,触摸屏为上位机,压力变送器、流量变送器及温度变送器为反馈单元,电动调节阀为执行机构等部分组成。运行结果表明,方案合理可行,保证了被控量的跟踪精度。

Development of Control System for Ceramic Membrane Pilotscale Experiment

In order to obtain the optimal values of the operating parameters of the new ceramic membrane, on the basis of analysis of the structure and working principle of the ceramic membrane, the overall plan of the control system and the hardware subsystem and software subsystem are designed severally. A method was presented to achieve accurate control of differential pressure and flow through three loop expert PID control algorithm. Control system was designed with PLC for main controller, touch screen as the upper computer, pressure transmitter, flow transmitter and temperature transmitter for feedback device and electricity-controlled ratio valve for actuator. The running result of system shows that the scheme is reasonable and achievable and the tracking accuracy of the controlled quantity is ensured.