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1 The materials involved in petrochemical production are highly dangerous, and there is a high probability of fire, explosion, and mass casualty. The raw materials, auxiliary materials, semi-finished products and finished products used in petrochemical production, such as crude oil, natural gas, gasoline, liquid hydrocarbons, ethylene, and propylene Wait, most of them are flammable and combustible substances. Once leaked, it is easy to form explosive mixtures to burn and explode. Many materials are highly toxic and highly toxic substances, such as benzene, toluene, sodium cyanide, hydrogen sulfide, chlorine, etc. Improper handling or leakage of these materials can easily lead to personal injury and death; in the process of petrochemical production, a variety of highly corrosive acids and alkalis such as sulfuric acid, hydrochloric acid, and caustic soda are used, and problems with equipment and pipeline corrosion have occurred. The possibility is high; some materials also have spontaneous combustion and burst polymerization characteristics, such as metal organic catalysts, ethylene, etc.
2 The petrochemical production process technology is complicated, the operating conditions are harsh, and prone to sudden catastrophic accidents. During the petrochemical production process, many physical, chemical processes and mass and heat transfer unit operations are required. Some process control conditions are extremely harsh, such as high temperature, high pressure, low temperature, and vacuum. For example, the temperature of steam cracking is as high as 1100 ° C, and the temperature of some cryogenic separation processes is as low as -100 ° C; the polymerization pressure of high-pressure polyethylene reaches 350MPa, and the production pressure of polyester raw material polyester is only 1 ~ 2mmHg; especially under reduced pressure In many processes such as distillation, catalytic cracking, coking, the temperature of the material has exceeded its spontaneous ignition point. These harsh conditions have imposed strict requirements on the manufacturing, maintenance and personnel quality of petrochemical production equipment, and any small mistake may lead to catastrophic consequences.

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