摘要
为了避免内浮顶储罐由于雷击火花放电引起的火灾燃爆事故,在实验室建立了2 m直径内浮顶储罐模型,开展了储罐8/20μs模拟直击雷实验,结合理论分析及软件仿真,研究结果表明:内浮顶储罐遭受雷击时,储罐相当于"几乎封闭但带有孔的法拉第笼",雷电流、感应电荷主要通过罐体泄放入地,但这些孔不断有油气泄放,有时能达到爆炸范围,具有较大的雷击危险性;储罐遭受雷击时的另一风险主要表现在雷击瞬时罐体呈现高电位,如罐体各部位等电位连接不可靠易引起火花放电。结合内浮顶储罐的实际运行情况,提出了罐顶通气孔安装阻火器、规范导静电线设置、导向柱设施与浮盘密封绝缘、液位仪及相连管线与储罐等电位连接等措施,可大大降低内浮顶储罐雷击火灾燃爆事故。
In order to avoid internal floating roof tank fire explosion accident caused by lightning strikes. We establish 2 m diameter tank model and carry out 8/20p^s direct lightning stroke simulation experiment. Combining theoretical analysis and software simulation, research results show that： When the internal floating roof tank being struck by lightning, the tank is equivalent to the almost closed but with holes of the Faraday cage. Lightning current and the induced charge discharge into the ground through the tank shell. However the holes are continually release of oil and gas and sometimes can reach the explosive range. So the holes of internal floating roof storage tank have greater lightning fire risk. The other main lightning fire risk is that tank shows high potential as lightning transient and the metal parts of tank may easily cause sparks discharge if unreliable connection exists. Combined with the actual operation of the tanks, some measures being put forward and greatly reduce lightning fire explosion accident of internal floating roof tank, such as the tank roof vent installing flame arrester, standardized setting of static conductive line, guide post sealing and electrical insulation with floating roof, Level gauge and associated pipelines bonding with tank, etc.
出处
《电瓷避雷器》
CAS
北大核心
2013年第2期69-72,78,共5页
Insulators and Surge Arresters
基金
国家科技支撑计划项目(编号:2012BAK03B03)
关键词
内浮顶储罐
雷击火灾
模拟实验
火花放电
Internal floating roof tank, Lightning Fire, Simulation experiment, Spark discharge
