Experimental study on melting and flowing behavior of thermoplastics combustion based on a new setup with a T-shape trough.
Experimental study on melting and flowing behavior of thermoplastics combustion based on a new setup with a T-shape trough.
复制标题
DOI：
10.1016/j.jhazmat.2008.12.057
复制
发表时间：
2009-07
影响因子：
13.6
通讯作者：
Q. Xie;Heping Zhang;R. Ye
中科院分区：
文献类型：
--
作者：
Q. Xie;Heping Zhang;R. Ye
本工作的目的是定量研究热塑性塑料的燃烧特性。设计了一种新型的带T形槽的实验装置。在此基础上，可以很好地模拟和研究热塑性塑料熔融滴落引起的壁火和池火之间的循环机理。此外，还可以对池火的流动特性进行定量分析。对不同厚度的PP和PE板材进行了实验研究。记录并分析了T形槽内诱导流动池火焰的最大距离。还监测了典型的火灾参数，如热释放率(HRRs)、CO浓度。结果表明，热塑性板材的软化和粘连对其垂直壁面燃烧起着相当大的作用。结果表明，热塑性塑料的粘着性主要与热塑性塑料的软化温度、着火温度以及粘性系数有关。通过比较不同厚度热塑性塑料板材在T形槽中产生的池火流动火焰的最大距离，发现PE材料引发的池火比PP材料更容易流出。因此，PE材料可能更危险，因为它们的池火在地板上蔓延得更快。这些实验结果初步表明，这一新的实验装置有助于定量研究热塑性塑料的特殊燃烧特性，但该装置还需进一步改进。
The objective of this work is to quantitatively study the burning characteristics of thermoplastics. A new experimental setup with a T-shape trough is designed. Based on this setup, the loop mechanism between the wall fire and pool fires induced by the melting and dripping of thermoplastic can be well simulated and studied. Additionally, the flowing characteristics of pool fires can also be quantitatively analyzed. Experiments are conducted for PP and PE sheets with different thicknesses. The maximum distances of the induced flowing pool flame in the T-shape trough are recorded and analyzed. The typical fire parameters, such as heat release rates (HRRs), CO concentrations are also monitored. The results show that the softening and clinging of the thermoplastic sheets plays a considerable role for their vertical wall burning. It is illustrated that the clinging of burning thermoplastic sheet may be mainly related with the softening temperatures and the ignition temperatures of the thermoplastics, as well as their viscosity coefficients. Through comparing the maximum distances of flowing flame of induced pool fires in the T-shape trough for thermoplastic sheets with different thicknesses, it is indicated that the pool fires induced by PE materials are easier to flow away than that of PP materials. Therefore, PE materials may be more dangerous for their faster pool fire spread on the floor. These experimental results preliminarily illustrate that this new experimental setup is helpful for quantitatively studying the special burning feature of thermoplastics although further modifications is needed for this setup in the future.