压缩机组仪表及控制系统故障原因分析及对策  

Analysis and Countermeasures of Faults in Compressor Unit Instruments and Control Systems

作　　者：郭颢 Guo Hao(Daqing Petrochemical Machinery Factory Co.,Ltd.,Daqing Heilongjiang 163714)

机构地区：[1]大庆石油化工机械厂有限公司,黑龙江大庆163714

出　　处：《中国仪器仪表》2024年第12期85-88,共4页China Instrumentation

摘　　要：对于苯乙烯生产装置中的压缩机系统,频繁出现的仪表和控制系统故障问题受到了关注。该问题源于多种因素,比如选用不合适的现场感应仪表,独立联锁仪表的可靠性不足,现场可编程逻辑控制器(PLC)依赖于不稳定的市电供应,以及PLC的CPU、I/O模块、通信模块和电源模块缺乏冗余设计。此外,PLC运行的现场环境条件恶劣也是重要原因之一。为解决这些问题,本文采取了针对性的改进策略,如优化现场感应仪表的设计,将单一联锁逻辑转换为双冗余二取二联锁逻辑,将PLC控制系统替换为分布式控制系统(DCS),并将现场仪表的电力供应从市电转变为不间断电源(UPS)。这些举措成功地将因仪表和控制系统故障导致的非计划停机次数降至零,有力地确保了苯乙烯装置的安全、稳定和长期运行。The frequent occurrence of instrument and control system failures in the compressor system of styrene production equipment has received attention.This problem is caused by various factors,such as the selection of inappropriate on-site induction instruments,insufficient reliability of independent interlocking instruments,the dependence of on-site programmable logic controllers(PLCs)on unstable mains power supply,and the lack of redundant design in the CPU,I/O modules,communication modules,and power modules of PLCs.In addition,the harsh on-site environmental conditions during PLC operation are also one of the important reasons.To address these issues,targeted improvement strategies have been adopted,such as optimizing the design of on-site induction instruments,converting single interlocking logic to dual redundant two out of two interlocking logic,replacing PLC control systems with distributed control systems(DCS),and transforming the power supply of on-site instruments from mains power to uninterruptible power supply(UPS).These measures have successfully reduced the number of unplanned shutdowns caused by instrument and control system failures to zero,effectively ensuring the safety,stability,and long-term operation of the styrene plant.

关 键 词：压缩机组 仪表 控制系统 故障 

分 类 号：TP2[自动化与计算机技术—检测技术与自动化装置]