| With the continuous development of power enterprises, people’s daily life and modern industrial enterprises have been inseparable from power. Therefore, ensuring safety in production operation of power enterprises is an important issue. Thermal power plant is a complex system and involves a wide range and large system, and the production environment has its own unique characteristics, such as electrical equipment and multi-device correlation between large, multi-temperature and high pressure equipment(boilers, pressure vessels, steam turbine, etc.), easy burning more explosive materials, special operations and more features, fire, explosion or other dangerous probability of large accidents with the consequences are more serious.Currently, Safety assessment work has been carried out in the the power enterprises across the country successively, methods for fires and explosion evaluation are many, in this paper, on the basis of referring to the relevant information of domestic and foreign, firstly,describes the profile of object of study and production technical process of thermal power plant, and carry out fire and explosion hazard analysis combined with technological process of thermal power plants; Secondly, take a thermal power plant as an example, identifying major hazards of its boilers, pressure vessels and hazardous chemicals, elaborate on the related concepts of safety assessment, according to the principle and method of dividing evaluation units, take fire and explosion risk factors of thermal power plant as evaluation of units, and then divide into eight evaluation sub-unit according to the production function, select and apply a risk analysis, Fault tree method, Dow Chemical Method(DOW) carrys out that a fire and explosion hazard assessment for the thermal power plant‘s hydrogen stations, cable fire, and diesel tank, apply pool fire mode and explosion model to predict the accident consequences of diesel tank and boiler explosion, get the radius of harm to the person and the extent of damage to equipment and buildings, this forecast results provide a reference for the fire safety management of thermal power plant‘s fuel tank, and boiler room.Introducing DHGF integrated method to industrial safety evaluation process can converted the object of study from qualitative to quantitative evaluation, in theory, it has the scientificalness and reasonableness. Applying DHGF integrated method to the case study, fire risk assessment index system for fire and explosion hazard in boiler areas and fire hazard in electrical systems were established based on the analysis of characteristics of boiler‘s fire, explosion and electrical fire. It can be quantitatively derived index layer to the target layer right weight In the evaluation index system and infer boiler?s fire, explosion risk level and electrical systems’ fire risk level by evaluating the boiler‘s fire, explosion and electrical fire Hazards using DHGF Integrated method. The conclusion is consistent with its actual operation and proves that DHGF integrated method is not only scientific in theory, but also reliability and operability in practice. |
