PLC控制系统在天然气脱水系统中的应用

摘要

通过对天然气脱水工艺进行研究,采用分子筛脱水工艺,设计开发了PLC控制系统.该控制系统分别采用PLC和PID实现顺序控制和连锁保护,并辅以组态软件实现系统的上位监控.经投运证明,该控制系统操作简便、顺控执行流畅、连锁保护可靠.系统脱水效果显著,达到了对天然气露点控制预期的要求.%Through researching the technological process of the dehydration of natural gas, the molecular sieve dehydration process has been selected and the PLC control system for it is designed. In this control system, PLC is adopted for implementing sequential control, PID regulation and interlock protection, with supplemented configuration software, the host computer monitoring of the system is also realized. The operation verifies that the control system features ease operation, smooth sequential execution, reliable interlock protection and outstanding dehydration effect, thus the expected requirement for dew point control of natural gas is achieved.