黑索今的粉尘爆炸特性研究.pdf

南京理工大学硕士学位论文黑索今的粉尘爆炸特性研究姓名:付文文申请学位级别:硕士专业:安全技术及工程指导教师:陈网桦;饶国宁 20080624 硕士论文黑索今的粉尘爆炸特性研究摘要本文利用20L球和哈特曼管研究了黑索今的粉尘爆炸特性及其安全防护措施。首先研究粉尘的可燃性特征、物理状态和外界环境等三种不同因素对黑索今粉尘爆炸特性的影响。在其可燃性特征方面,研究了黑索今粉尘的爆炸下限浓度和最小点火能, 实验得出黑索今的爆炸下限浓度约为709/m3,黑索今的粒径越小,与铝的混合粉尘所需点火能越小;在物理状态方面,研究了粉尘粒径的变化对其爆炸特性的影响,结果发现,粒径越小,同一浓度下粉尘爆炸的压力峰值砌和压力上升速率峰值(dp/dt)所均越大;分别从球体温度、粉尘湍流速度、点火能量出发研究了外界环境因素对粉尘爆炸特性的影响,结果发现,在10℃~50℃范围内,球体温度的升高有增大黑索今粉尘的Pm的趋势,对(dp/dO肼的影响规律不明显。粉尘湍流速度和点火能量越大, 黑索今的(dp/dt)册和Pm均越大。其次,本文还研究铝粉、石墨、乙酸乙酯、石油醚、水分、粉末碳酸钙等物质对黑索今粉尘爆炸特性的影响,发现铝粉、石墨、乙酸乙酯、石油醚对黑索今的粉尘爆炸特性具有增强作用,而粉末状碳酸钙和水对其具有较显著的抑制作用,这些结果对更好地研究和应用黑索今粉尘的爆炸特性,研究和开发相应的安全防护措施具有重要的参考价值。最后,在总结以上实验结果的基础上,利用模糊理论,初步建立了黑索今粉尘爆炸可能性和危险性的指标评价体系,为类似粉尘爆炸危险性的预测提供帮助和参考。关键词:黑索今,20L球,粉尘爆炸,抑爆,增强效应,安全防护,模糊理论 Abstract 硕士论文 Abstract The explosion characteristics and thesafeguard andprotection onthe RDX dustwere studied experimentally by using 20 L-Sphere and ,the influence ofdifferent factors on the dust explosion f-actorswere divided intothreekinds which weretheself-ignition oftheRDX dust,thedustphysics state and theenvironment theaspect of theself-ignition ofthe RDX dust,the lower limit ofexplosion and theminimum ignition energy were had been demonstrated experimentally thatthe lower limit ofexplosion ofRDX Was atabout 709/m3. The ignition energy ofthemixture ofRDX andaluminum Wassmaller withthe RDX dust influence ofthedust size tothecharacteristics of RDX dust were has been demonstrated thatthesmallerthe dustsize,thebigger theexplosion pressure and thepressure rise rate ofRDX sphere temperature,the dust turbulanceand theignition energy were researched attheaspect ofenvironment Was proved thatthe riseoftheenvironment temperature andtheignition energy could only strengthen the pressure riserate,but not theexplosion ,it has been demonstrated thatthere Wasanstrengthening effect on theexplosion pressure and the pressure rise rateofRDX dustwhen the