材料浓缩技术温度测控方法的研究

Temperature control method based on material concentrated technology

针对机械式蒸汽再压缩浓缩技术对二次蒸汽温度不能进行实时监控,产生能源浪费的问题,采用西门子S7-200PLC控制器为核心元件搭建一套实时监控系统对二次蒸汽温度进行监控.该系统在计算机软件驱动下,运用比例积分微分指令模块构建闭环反馈调节系统对二次蒸汽温度进行调控,并用仿真软件对闭环反馈调节系统进行模拟.针对压缩机能耗问题,在电动机上串联变频器,通过可编程逻辑控制器控制变频器,改变电动机的转速降低能耗。研究表明,闭环反馈调节系统能够实现对二次蒸汽温度的实时控制,且人机界面可以直接监控系统的运转状况,并通过变频器改变电动机的工作频率可以降低能耗.该系统组建简单方便,适合对机械式蒸汽再压缩浓缩系统进行实时监控.

A System w hich can real-time monitor the secondary steam temperature by using the Siemens S7-200PLC controller was proposed to solve the problems that the secondary steam temperature can not be real-time monitored by mechanical vapor recompression concentration technique and energy is was-ted .Driven by designed computer software ,a closed-loop feedback control system was constructed to control secondary steam temperature by porportional integral differential instruction module ,then is was simulated by the simulation software .The speed of the motor was changed to reduce energy con-sumption through the programmable logic controller controlling the inverter .The results show that the two steam temperature real-time control is realized by the closed loop feedback control system ,opera-tion conditions of w hich are directly monitored by human-computer interface and the energy consump-tion is reduced by the inverter changing the working frequency of the motor .It is found that the system can be set up simply and conveniently ,and w hich is suitable for monitoring the system of mechanical vapor recompression concentration technique .