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Study on the Environment Risk Assessment Method of Chemical Industry

Author: DuXiChen
Tutor: ChenQiang
School: Lanzhou University
Course: Environmental Engineering
Keywords: Chemical industry Environmental Risk Assessment Fault Tree Analysis
CLC: X820.4
Type: Master's thesis
Year: 2008
Downloads: 829
Quote: 9
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Abstract


The birth of the environmental risk assessment , marks an important turning point for environmental protection strategy , which before the accident risk prediction and management , to reduce the probability of accidents and incidents harm . The particularity of the chemical industry because of its production , in the event of an accident , will often cause a lot of property damage , casualties and environmental pollution , the consequences are extremely serious . Therefore , it is necessary to study the environmental risk assessment of the chemical industry . In this paper, a number of problems in the environmental risk assessment and risk characteristics of the chemical industry , as discussed : analysis of environmental risk assessment and safety evaluation and distinction , expanded in-depth study and practice of environmental risk assessment references ; sorting the various types of environmental risk assessment methods , summarizes the characteristics of the various types of methods and a comparison , the final choice fault tree analysis as the evaluation method for the study of synthetic ammonia project maximum credible accident . Statistical analysis of the accidents occurred in the past 20 years of domestic ammonia project , obtained in the various types of risk , the number of leakage accident and casualties caused more than a fire and explosion , and liquid ammonia storage tank area accidents account for a large proportion of the spill , and a certain degree of argumentation for ammonia determination of the maximum credible accident . The ammonia energy-saving technological transformation projects combined with a fertilizer plant in Gansu , fault tree analysis method and qualitative analysis of the project has been to determine the maximum credible accident - liquid ammonia leaked , minimal cut sets and minimal path sets based on targeted proposed effective measures to prevent liquid ammonia leaked accident ; Finally, assuming a fundamental event in the fault tree led to a liquid ammonia leak occurred , the local weather conditions , the distribution of residential areas and ammonia toxicity characteristics of hazards after the accident the scope and risk prediction, the value of the project 's maximum credible accident risk value is lower than the risk of chemical industry statistics , made ??the conclusion of the project 's risk is acceptable . The subject of research , not only for the decision-making and management of project risk basis , but also provides a reference to the environmental risk assessment work carried out similar trades .

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CLC: > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Analysis and Evaluation of Environmental Quality > General issues > Risk Assessment
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