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苯酐包装线是苯酐装置重要设备,负责将来自结片机的苯酐物料进行自动定量包装并输送至码垛机组单元,整个过程由PLC及F701称重仪表进行控制。由于原控制系统在功能上和安全上存在很多缺陷,再加上受苯酐腐蚀老化严重,2014年对其进行了重新设计,安装和调试,并于2014年12月一次开车成功。经过一年的运行,证明该系统功能完善、安全可靠、易于维护。本文详细阐述了苯酐包装线工艺流程、控制系统组成、控制逻辑。
Phthalic anhydride packaging line is an important device of phthalic anhydride device, is responsible for the auto-quantitative packaging of phthalic anhydride from the SCM and delivery to the palletizing unit. The whole process is controlled by PLC and F701 weighing instrument. As the original control system had many defects in function and safety, coupled with severe corrosion and deterioration by phthalic anhydride, it was redesigned, installed and commissioned in 2014 and was successfully started in December 2014. After a year of operation, the system proved to be fully functional, safe, reliable and easy to maintain. This paper elaborates the phthalic anhydride packaging line process, control system components, control logic.