自热物质发热特性研究  

Study on the thermal properties of the self-heating substances

作　　者：王玥[1] 李晋[1] 赵力增[1] 吕东[1] WANG Yue;LI Jin;ZHAO Li-zeng;LV Dong(Tianjin Fire Research Institute of MPS,Tianjin 300381,China)

机构地区：[1]公安部天津消防研究所,天津300381

出　　处：《消防科学与技术》2018年第8期1027-1029,共3页Fire Science and Technology

基　　金：公安部重点研究计划项目"典型固体自热物质火灾特征及事故处理技术研究"(2017JSYJA13)

摘　　要：选择还原铁粉作为自热物质开展试验研究,模拟恒温氧气充足的条件、绝热氧气不足的条件、弱散热弱空气流动的条件和室内条件下的堆积,分析温度变化曲线。通过试验发现,温度上升速率和试样最高温度都受到与空气的对流换热强度、环境中的氧气含量、与空气的接触面积等因素的影响;弱散热弱气体流动的条件下温度上升速率最大,最大为2.094℃/min,室内环境下的堆积试验中堆积中心处温度最高,最高温度为94.7℃。The reductive iron powder was selected as the self-heat-ing substances to carry out experimental research.In the experi-ments,four conditions were simulated,namely the condition of constant temperature and sufficient oxygen,the condition of adia-batic oxygen shortage,the condition of weak cooling and weak air flow and accumulation of solid under indoor conditions.Through the experiments,it could be found that the temperature rise rate and the highest temperature of the sample were affected by the con-vective heat transfer intensity of air,the oxygen content in the en-vironment,and the contact area of air.Under the conditions of weak cooling and weak air flow,the temperature rise rate was the largest,and the maximum temperature was 2.094℃/min.In the in-door environment,the temperature of the accumulation center was the highest,and the highest temperature was 94.7℃.

关 键 词：还原铁粉 自热物质 温度上升速率 对流换热 

分 类 号：X932[环境科学与工程—安全科学] TK121[动力工程及工程热物理—工程热物理]