The rapid development of China's petrochemical industry

1 Introduction With the continuous advancement of chemical technology, China's petrochemical industry is rapidly developing. The variety of dangerous goods involved in production is increasing. The technological conditions for production are becoming increasingly demanding, and the scale of production is becoming larger and more automated. These developments and advancements are being promoted. The growth of the national economy has also brought about major security risks. In the safety production process of petrochemical enterprises, the safety of the process is a key part of the safety of the chemical production process. Therefore, it is particularly important to evaluate the safety of the process. Although the risk evaluation of construction projects has been developed in China for several decades, both the evaluation model and the evaluation methods have made progress. However, there are not many studies on the risk assessment of hazardous chemicals in chemical projects. There is no comparison at present. Scientific universality assessment method. Therefore, it is of great significance to study the risk assessment index system for dangerous chemicals in petrochemical enterprises.

2 Design Principles of the Index System The design principles of the index system include: guidance, system, science, objectivity, operability, dynamics, and stability. The selection of indicators in the evaluation index system must be scientific, reasonable, and objective. It should fully reflect the characteristics of the evaluation system that are different from other systems. In the consideration and selection of indicators, the above-mentioned indicator system design principles should be used. Specifically, the following aspects should be achieved: (1) The selected indicators must be able to accurately and prominently reflect the characteristics of the system, and have important implications for the evaluation results. The key to seizing the problem while considering the evaluation system system is to screen out the main influencing factors and construct a clear, concise and clear indicator system.

(2) As the evaluation system is a petrochemical chemical process safety risk assessment system, there are certain interactions between the selected safety indicators, so the selected indicators should be representative.

(3) The combination of qualitative and quantitative principles is more scientific and reasonable. The process of applying the constructed index system to the actual evaluation is a process of quantitative valuation calculation. As far as possible, the indicators that can be quantified should be selected. For the difficult-to-quantify important indicators, the qualitative analysis can be used to perform fuzzy analysis. Zoom in to get the overall value.

(4) The set indicators must have operability. In the screening process, the feasibility of the analysis data collection required by the indicators should be considered, and the indicators of easy access to data should be used as far as possible.

3 The establishment of the index system The construction of the evaluation index system is a “concrete-abstract-concrete” dialectical logical thinking process. It is based on fully understanding and understanding the specific conditions of the research object, combining relevant standards and expert experiences, and The process of systematization, in-depth, and consummation can be roughly divided into four stages: theoretical preparation, initial selection of indicator systems, complete indicator system, and trials of indicator systems based on the influencing factors involved in hazardous process risk characterization. Based on the census of hazardous chemical processes in the enterprise, combined with the situation of the chemical industry, important evaluation indicators with typical representative significance were selected as the research object, through theoretical analysis, system analysis, expert consultation, and secondary data analysis, with reference to domestic and foreign research. Results, comprehensively absorb, summarize, reorganize, add or delete existing evaluation indicators, remove those factors that have weak influence and have little effect, and then study and analyze the relationship between major factors, thus establishing a petrochemical enterprise process risk assessment index system for hazardous chemicals. The index system is divided into two parts, which are the dangerous part of the process and the safety compensation part. The inherent risk of the process is again three levels. The first layer is the target layer, reflects the inherent risk of the company's dangerous process, and the second layer is the criterion level, which is to measure the dangerous chemical process from four aspects of materials, process parameters, safety control and equipment. China's safe production of scientific and technological risks, the third layer is the factor layer, is a specific evaluation index, specifically see the bomb index evaluation method, through four aspects of safety management, material isolation, fire prevention facilities and personnel environment for compensation.

4 Rationality Analysis of Indicator System (1) Relative to Dow Chemical Fire Explosion Index Method and ICI Monde Method, the index system established in this paper is more detailed in terms of process parameters, safety control, and safety management compensation, and is considered more comprehensive. Science, especially the addition of process safety management compensation, is not available in the first two approaches. In other words, the above two methods only analyze the intrinsic safety of the process itself, and there is no practical data for the evaluation of the process operation stage. The evaluation index system involved in this paper can be better applied to the safety status assessment.

(2) When considering the inherent danger of the process, this article focuses on the inclusion of safety control indicators, and these indicators are only used as a compensation in the Dow Chemical and Munde method. The reason for this is mainly due to the State Administration of Work Safety's emphasis on the management of 15 kinds of dangerous chemical processes, requiring companies to introduce automatic control systems to the devices in order to reduce the probability of risk occurrence. Therefore, this article considers the safety control system as a fixed part of the process and incorporates it into the inherent danger of the process.

5. Conclusions After investigation and research, it has been found that there is currently no safe assessment method for assessing the risk grade of dangerous chemical processes in petrochemical enterprises in China. After careful study of 15 hazardous chemical processes divided by the State Administration of Work Safety, the The influencing factors involved in process characterization, combined with the actual conditions of the process, selected a representative representative of importance evaluation indicators as the research object, using theoretical analysis, system analysis, expert advice and other methods to filter the indicators, the establishment of a petrochemical company hazardous chemicals The process risk rating evaluation index system provides a more scientific method for the risk assessment of dangerous chemicals in petrochemical enterprises, which facilitates the government and enterprises to strengthen safety management and further realizes the intrinsic safety of petrochemical enterprises.