Analysis on Ignition Characteristics of Spandex Anti-yellowing Agent Dust
LUO Zhenmin1,2,*, ZHANG Chunyan1, YANG Yong1
1 College of Safety Science and Technology, Xi'an University of Science and Technology, Xi'an 710054, China 2 Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi'an 710054, China
Abstract: In order to study the combustion characteristics of spandex anti-yellowing agent dust, a standard experimental device for the minimum ignition temperature of dust cloud and a simultaneous thermal analysis technique were used to study the distribution characteristics of the minimum ignition temperature of dust cloud (MITC) and pyrolysis characteristics of anti-yellowing agent HN-150. The results show that: the smaller the dust particle size, the lower the MITC; the dust spray pressure increases, the MITC rises; the dust cloud concentration increases, the MITC first decreases and then stabilizes, and when the dust mass concentration is greater than 2 096 g/m3, the MITC are stable at 270 ℃, and when it is less than 150 g/m3, no fire occurs. With the increase of particle size, the ignition temperature, peak temperature and combustion temperature of dust show an increasing trend, and the maximum burning rate, average burning rate, flammability index and comprehensive combustion characteristics index show a decreasing trend; with the increase of heating rate, the combustion characteristics parameters of dust all show an increasing trend. As the particle size decreases, the average activation energy of the dust decreases, and the more prone to combustion. MITC and the ignition temperature in the pyrolysis process have a corresponding relationship, which is consistent with the results of combustion characteristics and thermal analysis kinetics. The ignition temperature of MITC and pyrolysis process is consistent with the results of combustion characteristics and thermal kinetics analysis. Therefore, this basic study can provide a reference basis for the safe production of anti-yellowing agent.
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2024, Vol. 38 
