LNG火灾事故下相邻储罐水喷淋热辐射防护研究  

Study on radiation protection of water spray in adjacent storage tanks under LNG fire accident

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作  者:赵江平[1] 赵亮[1] ZHAO Jiangping;ZHAO Liang(School of Resource Engineering,Xi an University of Architecture and Technology,Xi an Shaanxi 710055,China)

机构地区:[1]西安建筑科技大学资源工程学院,陕西西安710055

出  处:《工业安全与环保》2023年第4期11-16,共6页Industrial Safety and Environmental Protection

摘  要:为研究LNG储罐火灾事故下水喷淋对相邻储罐的热辐射防护影响,以某LNG罐区为研究对象,基于动态火灾仿真软件FDS建立LNG水喷淋冷却防护下火灾仿真模型,研究喷淋流量和风速对热辐射防护的影响,并对火灾热辐射导致罐壁钢材热应力失效进行分析。结果表明,水喷淋可以有效降低相邻储罐接收到的热辐射值,热辐射防护效率随着喷淋流量的增加相应提高,总体保持在30%~40%;同时水喷淋装置能有效延长罐壁因热辐射导致升温发生热应力失效的时间,但随着风速的增加,整体热应力失效的时间明显缩短;最不利点的喷淋流量应基于火灾应急响应时间进行设计。In order to study the impact of water spray on thermal radiation protection of adjacent tanks in LNG tank fire accidents,taking the LNG tank farm of an LNG emergency reserve station as the research object,a fire simulation model under LNG water spray cooling protection is established based on the dynamic fire simulation software FDS.The effects of spray flow and wind speed on thermal radiation protection are studied,and the thermal stress failure of tank wall steel caused by fire thermal radiation is analyzed.The results show that water spray can effectively reduce the thermal radiation received by adjacent storage tanks,and the thermal radiation protection efficiency increases with the increase of spray flow,which is generally maintained at 30%-40%;besides,the water spray device can effectively prolong the time of thermal stress failure due to temperature rise of tank wall caused by thermal radiation,but with the increase of wind speed,the overall time of thermal stress failure is significantly reduced;the spray flow at the most un favorable point shall be designed based on the fire emergency response time.

关 键 词:LNG池火 喷淋冷却 热辐射 防护效率 热应力失效 

分 类 号:TE88[石油与天然气工程—油气储运工程]

 

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