主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2023, Vol. 42 ›› Issue (11): 1462-1466.

• • 上一篇    下一篇

堆积密度对棉花阴燃特性及残留物形貌的影响研究

岳海玲, 郭子东   

  1. （中国人民警察大学 侦查学院，河北 廊坊 065000）
  • 出版日期:2023-11-15 发布日期:2023-11-15
  • 作者简介:岳海玲（1980- ），女，山西长治人，中国人民警察大学副教授，主要从事消防安全研究，河北省廊坊市安次区西环路220号，065000。
  • 基金资助:
    河北省高等学校科学技术研究项目（ZC2021037）

Effect of density on the smoldering process and residues of cotton

Yue Hailing, Guo Zidong   

  1. (Investigation Institute, China People's Police University, Hebei Langfang 065000, China)
  • Online:2023-11-15 Published:2023-11-15

摘要： 为研究棉花在加工和使用状态下的阴燃情况，选用密度分别为20、40、60、80 kg/m3的棉花块，采用底部加热的方式进行试验，研究了密度对阴燃特性及残留物的影响。结果表明，随着密度的增大，棉花样品的孔隙率、空气渗透系数发生变化，临界阴燃温度升高约35 ℃，蔓延速率降低50%～60%，阴燃持续时间从2 500 s延长至5 000 s，阴燃结束后的收缩程度减小，坍塌程度增大。阴燃残留物为黑色絮状物包裹内部灰白色灰烬，灰烬体积随密度增大而增加。研究结论可以为棉花阴燃火灾的预防与火场勘验提供参考。

关键词: 棉花, 阴燃, 燃烧残留物, 热重分析, 临界阴燃温度

Abstract: In order to study the smoldering of cotton in the processing and usage state, cotton with densities of 20, 40, 60, 80 kg/m3 were selected in this paper. The bottom heating method was used to carry out the experimental study. The effect of density on smoldering characteristics and residues was analyzed. The results show that with the increase of density, the porosity and air permeability coefficient of the sample change, so that the critical smoldering temperature increase by about 35 ℃, the spreading rate decrease by 50%～60%, and the smoldering duration increase from 2 500 s to 5 000 s. After smoldering, the shrinkage degree decreases and the collapse degree increases. The smoldering residue is a black flocculent covering the inner gray ash, and the ash volume increases with increasing density. The results can provide reference for the prevention and investigation of cotton smoldering fire.

Key words: cotton, smoldering, combustion residue, thermogravimetric analysis, critical smoldering temperature