合成氨装置SiS改造方案与实践

Reforming Scheme and Putting It into Practice for the SIS of the Synthesis Ammonia Device

针对化工装置如何合理、有效、经济地实施安全仪表系统（SIS）改造，结合大型合成氨装置的实际改造案例，本文对SIS系统改造的方案、内容、步骤等方面进行了全面阐述，并提出了改造过程中的要点。

Aiming at that how to reasonably, effectively and economically implement the reform for the Safety Instruments System （SIS） in chemical industry devices and combining with an example of a transformation instance, the aspects of the scheme, content and procedure, etc of the SIS reforming are comprehensively elaborated in this paper, and the key points of the reforming process are proposed as well.