Partitioned fire control of very large oil tank fires
TIAN Fengshi1,2, XUE Ran3, ZHENG Xin1, KANG Qingchun2,4
1. Beijing Key Laboratory of City Integrated Emergency Response Science, Institute of Public Safety Research, Department of Engineering Physics, Tsinghua University, Beijing 100084, China; 2. China People's Police University, Langfang 065000, China; 3. College of Electronic Information Engineering, Langfang Normal University, Langfang 065000, China; 4. Changzhou University, Changzhou 213000, China
Abstract：Fires in very large oil tanks are suppressed by injecting foam into the annular seal ring around the top until the ring is completely filled with foam. However, most of the foam ends up on the unburned area which does not control the fire and results in insufficient supply to the fire region. This paper presents a partition fire extinguishing plan for very large oil tanks that is more efficient and reduces foam use without changing the existing oil tank structure or the fire control system. The scheme was evaluated using an annular oil pan and a small external floating roof oil pan for experimental research on the foam fluidity and partitioned fire control. The results compare the effective covering time, the amount of foam and the fire control time. The results show that the foam spillover into different regions is directly related to the gap width and is not related to the oil pan shape and size. The results also show that the fire control time is shorter when using partitioned areas rather than the unpartitioned design. The partitioned fire control method then reduces the foam use by more than 60%. Experiments with a 3 m diameter oil tank fire are consistent with the results of the annular oil pan experiment, which shows that the advantages of zonal fire control are not related to the tank size and that the partitioned fire control scheme can be applied to very large oil tanks.
田逢时, 薛冉, 郑昕, 康青春. 超大型油罐火灾分区灭火方案及实验验证[J]. 清华大学学报（自然科学版）, 2022, 62(1): 13-20.
TIAN Fengshi, XUE Ran, ZHENG Xin, KANG Qingchun. Partitioned fire control of very large oil tank fires. Journal of Tsinghua University(Science and Technology), 2022, 62(1): 13-20.
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2022, Vol. 62 
