本文選題：引燃 + 熱顆粒　； 參考：《火災(zāi)科學(xué)》2017年03期

【摘要】：電焊操作、煙花燃放、工業(yè)磨削和高壓電線碰撞等過程容易產(chǎn)生高溫熱顆粒。這些熱顆粒一旦接觸可燃材料就有可能引燃材料,導(dǎo)致火災(zāi)。該文對熱顆粒引燃可燃堆積材料的行為進行實驗研究,從而為工業(yè)堆積材料的火災(zāi)防控方法提供參考。實驗加熱一系列不同直徑(6mm,8mm,10mm,12mm,15mm,20mm)的黃銅金屬顆粒作為熱源,并采用三種常見的工業(yè)堆積材料(木粉,炭粉,羥丙基甲基纖維素HPMC)作為可燃材料的代表物,研究不同功率金屬熱顆粒對材料的引燃行為,分析金屬熱顆粒引燃材料的臨界功率。結(jié)果表明,材料本身的性質(zhì)會影響熱顆粒的引燃行為,HPMC的引燃時間最長,木粉的引燃時間最短。隨著熱顆粒直徑的增加,熱顆粒引燃三種材料所需的功率值整體呈增大的趨勢。由于燃燒空腔的形成,HPMC的引燃臨界功率相對較高。
[Abstract]:Welding operation, fireworks discharge, industrial grinding and high-voltage wire collision are easy to produce high-temperature thermal particles. Once in contact with combustible material, these thermal particles may ignite the material and cause fire. In this paper, the behavior of ignition of combustible stacking materials by thermal particles is studied experimentally, which provides a reference for fire prevention and control of industrial piling materials. A series of brass metal particles with different diameters (6mm / 8mm / 10mm / 12mm / 15mm / 20mm) were heated and three common industrial stacking materials (wood powder, carbon powder, hydroxypropyl methyl cellulose HPMC) were used as the representative of combustible materials. The ignition behavior of metallic thermal particles with different power was studied, and the critical power of metal thermal particles was analyzed. The results show that the properties of the material can affect the ignition behavior of thermal particles and the ignition time of HPMC is the longest and the ignition time of wood powder is the shortest. With the increase of the diameter of thermal particles, the power value required for the ignition of the three kinds of materials shows a trend of increasing as a whole. The ignition critical power of HPMC is relatively high because of the formation of combustion cavity.
【作者單位】： 中國科學(xué)技術(shù)大學(xué)火災(zāi)科學(xué)國家重點實驗室;
【基金】：國家重點研發(fā)計劃項目(2016YFC0800104) 國家自然科學(xué)基金(51576184)
【分類號】：X932
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本文編號：2092069