关键词: SIS安全仪表系统 重大危险源辨识 HAZOP分析 联锁控制, Safety Instrument Systems（SIS） Identification of Major Hazard Installations Hazard and Probability Analysis(HAZOP) Interlock and Control

Abstract: It is very important that the Safety Instrument Systems（SIS）in preventing and reducing oil chemical factory or device process risk. It is directly affects the safe operation of the equipment that the SIS system designed reasonable or not. According to the detail identification of hazardous chemicals major hazard installations and the complete device node hazard and probability analysis which the main production process of an annual output of chloroacetic acid 50000t project, the paper have confirmed the Safety Integrity Level(SIL) of the liquid chlorine storage and vaporization device, analyzed and carried out the major control parameters. It have been designed the SIS system of the device and the complete interlock and control, and put into production operation. The SIS system have been running well in the actual production and ensuring safe production of the production device which represents the SIS system’s reliability, security and the characteristics in the production of the chloroacetic acid project.