大型储罐罐底缺陷检测分析与维修工艺研究

发布时间：2018-03-11 10:55

本文选题：罐底缺陷　切入点：检测　出处：《西安石油大学》2016年硕士论文　论文类型：学位论文

【摘要】：目前,随着国内储罐数量日益增多,运营期都超过十年以上的储罐存在的安全风险也随之增加,无论油罐的大小,其设计寿命一般为20~30年,其内多储存易燃易爆、具有环境污染的介质。随着使用时间的延长和环境介质的影响,储罐材料不可避免的出现老化、腐蚀等缺陷,造成储罐安全度的下降,抗突发性荷载能力下降,加之罐内介质的不断倒运,压力或液位的不断变化,其罐底缺陷最容易引起介质泄漏,导致产生严重的经济损失和环境与生态污染。因此开展常压储罐罐底缺陷检测分析与维修工艺研究,对于确保储罐在日常生产中的安全运行,在突发性荷载产生时提高储备安全性、减少灾害损失等方面均具有重要的意义。本文针对石油储罐罐底材质与防腐的特点,掌握罐底板在腐蚀环境条件下的点蚀原因和腐蚀变化规律,进而可以结合罐底板腐蚀对罐底板的腐蚀状况进行预测和评估,分析储罐底板腐蚀的原因,对比分析了在役储罐中罐底缺陷检测方法。为了确保在役储罐的安全运行,进行基于风险的安全评估技术研究,制定基于风险的失效模式检验规程。本文以基于风险的大型储罐失效分析为研究背景,根据检测机构提供的实际案例与设计、制造、维护、检维修等规程,确定储罐维修改造方案。
[Abstract]:At present, with the increasing number of domestic storage tanks, the safety risks of storage tanks with more than ten years in operation have also increased. Regardless of the size of oil tanks, their design life is generally 20 to 30 years, and most of the storage tanks are flammable and explosive. With the prolongation of service time and the influence of environmental media, the storage tank materials inevitably appear aging, corrosion and other defects, resulting in the decrease of tank safety, and the ability to resist sudden load. In addition, with the continuous inversion of the medium in the tank and the constant change of pressure or liquid level, the defects in the bottom of the tank are the most likely to cause the medium leakage. As a result of serious economic loss and environmental and ecological pollution, the research on defect detection and maintenance of the bottom of atmospheric storage tank is carried out to ensure the safe operation of storage tank in daily production. It is of great significance to improve the safety of storage and reduce disaster loss when sudden load is generated. This paper aims at the characteristics of oil tank bottom material and anticorrosion. In order to predict and evaluate the corrosion condition of tank bottom plate combined with tank floor corrosion, the reasons of tank bottom plate corrosion can be analyzed by mastering the pitting cause and corrosion change law of tank bottom plate under corrosive environment conditions, and then the corrosion condition of tank bottom plate can be predicted and evaluated in combination with tank bottom plate corrosion. In order to ensure the safe operation of in-service storage tanks, the risk-based safety assessment technology is studied. In this paper, based on the risk based failure analysis of large storage tanks as the research background, according to the actual cases and design, manufacturing, maintenance, inspection and maintenance procedures provided by the inspection organization, Determine the storage tank maintenance and renovation plan.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE972

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