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 ›› 2022, Vol. 41 ›› Issue (2): 169-173.

• • 上一篇    下一篇

碳酸钙对木质粉尘层最低着火温度影响研究

吕鹏飞1,2，赵 静1，赵浩森1，庞 磊1,2   

  1. （1. 北京石油化工学院 安全工程学院，北京 102617；2. 北京市安全生产工程技术研究院，北京 102617）
  • 出版日期:2022-02-15 发布日期:2022-02-15
  • 作者简介:吕鹏飞（1986-），男，北京石油化工学院安全工程学院副教授，博士，主要从事爆炸安全方面的研究，北京市大兴区清源北路19号，102617。
  • 基金资助:
    北京市科技新星计划项目（Z181100006218092）；国家级大学生研究训练[URT]计划项目（2020J00062）

Effect of calcium carbonate on the minimum ignition temperature of wood dust layer

LV Peng-fei1,2， ZHAO Jing1，ZHAO Hao-sen1， PANG Lei1,2   

  1. (1. School of Safety Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China; 2. Beijing Academy of Safety Engineering and Technology, Beijing 102617, China)
  • Online:2022-02-15 Published:2022-02-15

摘要： 为研究碳酸钙含量对木质粉尘层最低着火温度的影响，利用HY16430粉尘层引燃温度试验装置测定油磨木粉、人工打磨木粉及两者分别与碳酸钙混合的粉尘层最低着火温度。结果表明：油磨木粉、人工打磨木粉、碳酸钙中位粒径分别为7.344、7.269、7.859 μm，堆积厚度为5 mm时，油磨木粉尘层最低着火温度为324 ℃，人工打磨木粉尘层最低着火温度为332 ℃。碳酸钙通过吸热加速热量消耗、减少氧浓度、降低木质粉尘浓度等方式，使木质粉尘层最低着火温度随碳酸钙含量的增加而升高。碳酸钙的质量分数达到40%时，油磨木粉、人工打磨木粉尘层最低着火温度急剧增大，均出现温度突变现象。碳酸钙的质量分数达到70%时，油磨木粉碳酸钙混合粉尘层最低着火温度较纯油磨木粉上升了17.3%，人工打磨木粉碳酸钙混合粉尘层最低着火温度较纯人工打磨木粉上升了18.7%。碳酸钙的质量分数达到80%时，热表面设置最高温度400 ℃，粉尘层均未着火。

关键词: 油磨木粉, 人工打磨木粉, 碳酸钙, 最低着火温度

Abstract: In order to study the effect of calcium carbonate content on the minimum ignition temperature of wood dust layer, HY16430 dust layer ignition temperature test device was used to measure the minimum ignition temperature of polished painted wood dust layer, hand polished wood dust layer and their mixture with calcium carbonate respectively. The results showed that when the median particle sizes of polished painted wood powder, hand polished wood powder and calcium carbonate were 7.344, 7.269 and 7.859 μm, respectively, and the accumulated thickness of dust layer was 5 mm, the minimum ignition temperature of polished painted wood dust layer is 324 ℃, and that of hand polished wood is 332 ℃. The minimum ignition temperature of wood dust layer increases with the increase of calcium carbonate content by means of increasing heat absorption to accelerate heat consumption, reducing oxygen concentration and reducing wood dust concentration. When the mass fraction of calcium carbonate reaches 40%, the minimum ignition temperature of dust layer of polished painted wood and hand polished wood increase sharply, and the temperature mutation phenomenon appears. When the mass fraction of calcium carbonate reaches 70%, the minimum ignition temperature of the mixed dust layer of polished painted wood powder is 17.3% higher than that of the pure polished painted wood dust layer, and the minimum ignition temperature of the mixed dust layer of hand polished wood powder is 18.7% higher than that of the pure hand polished wood dust layer. When the mass fraction of calcium carbonate reaches 80%, the hot surface has been set to a maximum temperature of 400 ℃, but the dust layer does not ignite.

Key words: polished painted wood powder, hand polished wood powder, calcium carbonate, minimum ignition temperature