料箱式立体仓库集装器具燃烧特性试验研究

Experimental study on combustion characteristics of containers in box type automatic warehouse

为了研究料箱式立体仓库存储单元火灾燃烧特性,采用3 MW量热仪开展不同材质、不同类型、不同码放方式的典型集装器具火灾燃烧特性试验,对比分析火蔓延行为、热释放速率、燃烧热值、热辐射强度等特性参数。结果表明:采用四角点火方式,单组聚丙烯和低压高密度聚乙烯无盖塑料周转箱在燃烧增长阶段的发展过程为慢速火,相对稳定燃烧阶段热释放速率小幅度增长并呈现锯齿形波动。单组聚乙烯斜插箱燃烧存在3个热释放速率峰值,火灾增长速率在慢速火和接近快速火之间变化。双组联排无盖塑料箱燃烧的热释放速率峰值和总放热量为单组数值的8倍和4倍,火灾增长速率提升24倍。结合料箱高密度存储工况,火焰存在跃迁窄巷道蔓延至邻近货架的可能性。

In order to study the combustion characteristics of the storage unit of the box type automatic warehouse,a 3 MW calorimeter was used to carry out full-scale combustion characteristics tests of typical containers with different materials,different types and different placement modes.The essential parameters of fire spread behavior,heat release rate,combustion calorific value,radiant heat distribution were analyzed.The results show that the development process of single polypropylene and high density polyethylene open-top container in the combustion growth stage is slow fire,the heat release rate shows zigzag fluctuations in the relatively stable combustion stage.When a single polyethylene inclined container is burned,there are three peaks of heat release rate due to different box structures and the rate of fire growth varies between a slow fire and a near fast fire.Under experimental conditions,the peak heat release rate and total heat release rate of the double-group tandem open plastic box combustion are 8 times and 4 times of the single group value,and the fire heat release growth rate is increased by 24 times.Considering the actual dense storage conditions,there is the possibility that the flame will jump the narrow roadway and spread to the adjacent shelves.