The Study On Safety Distance Of Chemical Industry Based On Environmental Risk Analysis

The raw material and products of production, storage and some controlled processes in the petroleum chemical industry are flammable, explosive and poisonous chemical substances. Once the leakage accident happens the consequence will be disastrous. In recent years, with the rapid development of urbanization, the chemical industry which has a reasonable planning has become hidden risks. The major environmental pollution events in world environment history show that, failure to maintain a certain distance with the peripheral sensitive region is one of the immediate causes, leading to the accident consequences magnified. However, there is no determination method and related standard on hazardous chemical safe distance in our country. So how to get a scientific and reasonable method to prevent the occurrence of heavy accidents and reduce the seriousness of consequences from the source, is an important topic urgently to be solved currently.Aiming at the above Problems, the environment risk accident under the specific meteorological condition was forecasted in this paper through the case analysis of 1.5 million hydrocracking project in the West Pacific Ocean petrochemical enterprise, and meanwhile theories of toxicology and double integral were taken as the theoretical principle and the method of safe distance and some suggestions were put forward at the end of the paper. The chief contents and conclusions are as followed:(1) The several methods on safe distance determination and the development course and recent advance were discussed. The related concepts and assessment content were also outlined.(2) The leakage, evaporation and diffusion model were introduced briefly. By comparing different models, Slab View was fixed up on as the optimal one in this paper.(3) The method on safe distance determination based on risk analysis and technology map were elaborated in chapter 4.(4) With the case analysis of 1.5 million hydrocracking project in the West Pacific Ocean petrochemical enterprise, the weather conditions which most likely caused local pollution and toxicity hazard in this region were chosen and SLAB View was used to predict the downwind diffusion curve and damaging range. Combined with the local population density and the leakage accident probability, three different forms of function fitting were compared and finally the safe distances was achieved.The method could overcome the defect of single supposition in safe distance in reality, and the results of the study could provide guidance for the development of urbanization, as well as, the environment and safety planning for poisonous gaseous leakage.