In order to solve the polution problem of the toluene contained waste gas produced by the organic chemistry production process, a toluene purified recycle system based on PLC and HMI is proposed.

• 摘要为了解决有机化工生产过程中排放的甲苯废气对环境的污染问题，设计了一套由PLC、HMI、智能仪表构成的甲苯净化回收控制系统。