摘要：随着我国工业发展的不断进步，粉尘爆炸事故不断发生，给人们的生命财产造成了巨大随时。所以粉尘爆炸的研究能够为防治粉尘爆炸事故提供依据，有效降低工业生产中粉尘爆炸事故发生的概率及严重程度。58117

本文不仅介绍了对于粉尘爆炸的研究的现况，还阐述了粉尘爆炸的原理。同时，针对石墨粉粉尘这种物质，参照相关的国家标准及相关文献资料，利用1.2L哈特曼管测试系统、20L爆炸球以及控制和数据采集系统等装置测得了石墨粉粉尘爆炸特性参数，即石墨粉的粉尘层最低着火温度为220℃，石墨粉粉尘云最小点火能应该为9mJ，石墨粉粉尘云最低着火温度为520℃，墨粉粉尘云的最大爆炸压力和爆炸指数分别为0.7723MPa和27.3098MPa*m/s，在浓度500g/m3时其最大爆炸压力和爆炸指数达到最大值；对于它的爆炸下限浓度，为40~50g/m3。

通过对实验数据的分析，从粉尘爆炸事故的防爆抑爆措施、救援时应注意的问题及企业日常管理等方面提出了相应的安全对策，为研究开发相应的设备设施提供了科学依据。

毕业论文关键词：粉尘爆炸；石墨粉；粉尘爆炸特性参数；防爆抑爆

Research on Dust Explosion Characteristics of graphite powder

Abstract:Along with the development of industry in our country, the dust explosion accidents occur repeatedly and cause a huge wastage to people's lives and property.So the dust explosion research can provides the basis for the prevention of dust explosion accidents, it also can effectively reduce the probability and severity of dust explosion accidents. This paper regarded graphite powder as the research object,it summaries the dust explosion research status at home and abroad, and expounds the principle of dust explosion.At the same time, with reference to the relevant national standards and related literature, ignition temperature of dust cloud determination device, 1.2 L, 20 L hartmann tube test system and explosion device. Such as control and data acquisition system have graphite powder dust explosion parameters, the minimum ignition temperature of dust layer graphite powder 220 ℃, graphite powder dust cloud minimum ignition energy should be 9 mj, graphite powder dust cloud minimum ignition temperature of 520 ℃, the maximum explosion pressure of toner dust cloud and explosion index of 0.7723MPa and 27.3098MPa*m/s respectively, the maximum explosion pressure and the index in 500g/m3 reached the maximum concentration;Toner concentration of dust clouds explosion limit of 40 < LEL < 50.

    Through the analysis of experimental data and the dust explosion blast explosion suppression measures, rescue attention problems and put forward the corresponding enterprise daily management of security countermeasures,and provides a scientific basis for research and development the corresponding equipment facilities.

KeyWords：dust explosion；graphite powder；Dust Explosion Characteristics；anti-explosion and suppressing explosion

目 录

1 绪论 1

1.1  课题的研究背景及意义 1

1.2  粉尘爆炸国内外研究现状 2

1.2.1  粉尘爆炸的机理研究 2

1.2.2  粉尘爆炸的应用技术 3

1.3  实验仪器与研究内容 4

2 粉尘火灾爆炸的介绍 5

2.1粉尘爆炸条件 5

2.2粉尘爆炸机理 5

2.2.1气相着火理论 5

2.2.2表面非均匀着火理论