智能化联锁保护系统技术改造总结

利用ＤＣＳ实现的大型合成氨和尿素全装置智能化联锁保护系统，是国家＂八·五＂重点科技攻关项目，该系统具有较高的可靠性、准确性和关联性，带有事故记忆和逻辑判断、智能化功能，它能替代操作人员要进行的大量操作和紧急事故处理，实现了智能化联锁保护功能，避免了工艺装置的误停车及停车时的扩大化和停车时的扰乱与失误，消除了因仪表造成的误动作及误停车现象，保证了工艺装置长周期安全稳定运行，投运效果良好。

Summary of Technical Revamp of Intelligencal Inter Loching Protection System

he DCS intelligence interlocking protection system in large-scale ammonia and urea plant is a key technical item ofthe national"Eighth Five-Year Plan".The system has higher reliability,accuracy and relativity,with error memory,logicjudgement,and intelligence function.It can carry out operation instead of the operator and deal with the eventual shut-down.It avoids process unit mistaken action and shutdown,shutdown enlargement turbulence and faults during the shut-down period,eliminates the mistaken action and mistaken shutdown due to the instrument faults,thus ensures safe,stableand long poried operation of the process unit.Implementation demonstrates its satisfactory result.