Explosion characteristics of zirconium dust cloud
-
摘要: 采用20 L近球形爆炸实验系统对锆粉尘云的爆炸特性开展了实验研究，分别分析了初始点火能量、点火延迟时间、粉尘云浓度3种因素对锆粉尘云爆炸强度的影响，揭示了锆粉尘云在密闭容器中的爆炸特性。在本实验条件下，结果表明：初始点火能量对锆粉尘云最大爆炸压力有显著影响，锆粉尘云最大爆炸压力随初始点火能量的增大而增大；随点火延迟时间的增加，锆粉尘云最大爆炸压力先增大后减小，存在最佳点火延迟时间；随粉尘云浓度的增大，锆粉尘云最大爆炸压力先增大后减小，存在最佳锆粉尘云浓度，得到锆粉尘云的爆炸下限为18~20 g/m3。Abstract: A 20-liter nearly-spherical container was employed to examine the influence of initial ignition energy, ignition delay time and zirconium dust concentration on the characteristics of zirconium dust cloud explosion. The experimental results indicate that the maximum explosion pressure of zirconium dust cloud increases as the initial ignition energy increases, however, with the increase of ignition delay time, the maximum explosion pressure of the dust cloud increases at first and decreases thereafter. At the same time, there exists an optimal ignition delay time. In addition, with the increase of dust concentration, the maxmum explosion pressure of the dust cloud increases at first and decreases thereafter as well. Finally, there exists an optimal dust concentration, and the lower explosion limit of zirconium dust cloud is 18 to 20 g/m3.
-
Key words:
- zirconium /
- dust cloud /
- explosion pressure /
- initial ignition energy /
- ignition delay time
-
表 1 不同工况下引燃后罐中的压力
Table 1. Pressure in the liter after ignitionunder different working conditions
E/kJ m/g p/kPa 1 0.24 1 2 0.48 9 3 0.72 15 4 0.96 21 5 1.20 28 6 1.44 37 7 1.68 46 8 1.92 52 9 2.16 59 10 2.40 68 
下载: 导出CSV
表 2 不同初始点火能量下锆粉尘云最大爆炸压力
Table 2. Maximum explosion pressures of zirconium dust cloud at different initial ignition energies
E/kJ pmax/kPa tmax/ms 是否爆炸 1 28 225.6 不爆炸 2 36 210.0 不爆炸 3 49 196.2 发生爆炸 4 54 230.0 发生爆炸 5 62 230.4 发生爆炸 6 69 198.2 发生爆炸 7 78 212.4 发生爆炸 8 83 204.0 发生爆炸 9 89 217.4 发生爆炸 10 100 228.2 发生爆炸
下载: 导出CSV
表 3 不同点火延迟时间下锆粉尘云最大爆炸压力
Table 3. Maximum explosion pressures of zirconium dust cloud at different ignition delay times
td/ms pmax/kPa 是否爆炸 20 42 不爆炸 40 46 发生爆炸 60 49 发生爆炸 80 56 发生爆炸 100 47 发生爆炸
下载: 导出CSV
表 4 不同锆粉尘云浓度下锆粉尘云最大爆炸压力
Table 4. Maximum explosion pressures of zirconium dust cloud at different zirconium dust cloud concentrations
c(Zr)/(g·m-3) pmax/kPa 是否爆炸 15 29 不爆炸 18 30 不爆炸 20 56 发生爆炸 30 73 发生爆炸 40 82 发生爆炸 50 198 发生爆炸 60 343 发生爆炸 70 397 发生爆炸 80 465 发生爆炸 90 254 发生爆炸 100 220 发生爆炸 110 163 发生爆炸 120 147 发生爆炸 130 135 发生爆炸 140 131 发生爆炸 188 113 发生爆炸
下载: 导出CSV
-
[1] 赫茨贝格M, 凯什多勒K L.粉尘爆炸知识介绍[J].刘小滨, 译.防爆电机, 1994(1): 42-51. http://www.cnki.com.cn/Article/CJFDTotal-FBDJ199402008.htm [2] 张帆.都是粉尘惹的祸:近10年来粉尘爆炸事故特点分析[J].湖南安全与防灾, 2014(11):13-15. http://d.old.wanfangdata.com.cn/Periodical/hnaqyfz201411005Zhang Fan.All is dust disaster:Nearly 10 years the characteristics analysis of dust explosion accidents[J].Hunan Safety and Disaster Prevention, 2014(11):13-15. http://d.old.wanfangdata.com.cn/Periodical/hnaqyfz201411005 [3] Doyle W L, Conway J B, Grosse A V.The combustion of zirconium in oxygen[J].Journal of Inorganic and Nuclear Chemistry, 1958, 6(2):138-142. doi: 10.1016/0022-1902(58)80059-7 [4] Ewald K H, Anselmi-Tamburini U, Munir Z A.Combustion of zirconium powders in oxygen[J].Materials Science and Engineering A, 2000, 291(291):118-130. http://www.sciencedirect.com/science/article/pii/S0921509300009679 [5] Badiola C, Dreizin E L.Combustion of micron-sized particles of titanium and zirconium[J].Proceedings of the Combustion Institute, 2013, 34(1):2237-2243. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=CC0213206886 [6] 王秋红, 孙金华, 周琪, 等.锆粉空气预混物多管喷射燃烧的火焰温度特征[J].燃烧科学与技术, 2012, 18(5):448-455. http://d.old.wanfangdata.com.cn/Periodical/rskxyjs201205013Wang Qiuhong, Sun Jinhua, Zhou Qi, et al.Flame temperature characteristics of multi-tube injection combustion of zirconium-air cloud mixtures[J].Journal of Combustion Science and Technology, 2012, 18(5):448-455. http://d.old.wanfangdata.com.cn/Periodical/rskxyjs201205013 [7] 王秋红, 孙金华, 邓军.管道中锆粉云火焰传播的温度与速度特性[J].北京科技大学学报, 2014, 36(10):1378-1383. http://d.old.wanfangdata.com.cn/Periodical/bjkjdxxb201410015Wang Qiuhong, Sun Jinhua, Deng Jun.Flame temperature and propagation speed characteristics of zirconium dust cloud flame propagation in pipelines[J].Journal of University of Science and Technology Beijing, 2014, 36(10):1378-1383. http://d.old.wanfangdata.com.cn/Periodical/bjkjdxxb201410015 [8] 丁以斌.锆粉云火焰传播特性的实验研究[D].合肥: 中国科学技术大学, 2010: 31-33, 93. http://cdmd.cnki.com.cn/article/cdmd-10358-2010133488.htmDing Yibin.Experimental study on flame propagation characteristics of zirconium particle cloud[D].Hefei: University of Science and Technology of China, 2010: 31-33, 93. http://cdmd.cnki.com.cn/article/cdmd-10358-2010133488.htm [9] Kenneth L C.Coal dust explosibility[J].Journal of Loss Prevention in the Process Industries, 1996, 9(1):65-76. doi: 10.1016/0950-4230(95)00050-X [10] 中华人民共和国国家技术监督局.粉尘云爆炸下限浓度测定方法: GB/T 16425-1996[S].北京: 中国标准出版社, 1996: 1-3. [11] Chawla N, Amyotte P R, Pegg M J.A comparison of experimental methods to determine the minimum explosible concentration of dusts[J].Fuel, 1996, 75(6):654-658. doi: 10.1016/0016-2361(96)00006-3 [12] Determination of explosion characteristics of dust clouds: Part 3: Determination of the lower explosion limit LEL of dust clouds: EN 14034-3[S].England: The Standards Policy and Strategy Committee, 2006: 5-16. [13] 袁旌杰, 伍毅, 陈瑜, 等.点火延迟时间对粉尘最大爆炸压力测定影响的研究[J].中国安全科学学报, 2010, 20(3):65-69. doi: 10.3969/j.issn.1003-3033.2010.03.012Yuan Jingjie, Wu Yi, Chen Yu, et al.Effect of ignition delay time on measurement of maximum explosion pressure of dusts[J].China Safety Science Journal, 2010, 20(3):65-69. doi: 10.3969/j.issn.1003-3033.2010.03.012 -
图(6) / 表(4)
计量
- 文章访问数: 4583
- HTML全文浏览量: 1473
- PDF下载量: 596
- 被引次数: 0