Propagation Law of Dust Explosion in Double-Sided Branch Structure Pipes

doi:10.12068/j.issn.1005-3026.2021.05.019

Abstract

Abstract: To investigate the propagation law of dust explosion in pipe network of industrial dust removal system， the experiments based on standard 1m³ dust explosion test system and self-designed double-sided branch structure pipes were conducted. The flame propagation velocity and overpressure of cornstarch explosion in pipes with double-sided branch structure were studied. The results show that the flame front propagation velocity in primary pipe shows a continuous acceleration trend with the increase of the propagation distance under three dust concentration conditions. The double-sided branch structure has a weakening effect on the flame propagation， and the decreased distance to the ignition end leads to an enhanced weakening effect.The installation positions of the branch structure will affect the overpressure in the pipe. The decreased distance to the ignition end leads to a continuous attenuation trend， while the far distance from the ignition end shows a trend of rapid decline followed by a rising and then decays slowly. The studies provide reference and practical value for the explosion prevention design of the dust removal system.

Key words: double-sided branch structure pipes; dust explosion; flame propagation velocity; explosion overpressure; cornstarch

CLC Number:

X932

LI Gang， CUI Zhen， HU Peng， NI Lei. Propagation Law of Dust Explosion in Double-Sided Branch Structure Pipes[J]. Journal of Northeastern University(Natural Science), 2021, 42(5): 734-740.

References

[1]Cashdollar K L.Overview of dust explosibility characteristics［J］. Journal of Loss Prevention in the Process Industries，2000，13(3):183-199.
[2]Myers T J.Reducing aluminum dust explosion hazards:case study of dust inerting in an aluminum buffing operation［J］.Journal of Hazardous Materials，2008，159(1):72-80.
[3]Abbasi T，Abbasi S A.Dust explosions-cases，causes，consequences，and control［J］. Journal of Hazardous Materials，2007，140(1):7-44.
[4]Li G，Yang H X，Yuan C M，et al.A catastrophic aluminium-alloy dust explosion in China［J］.Journal of Loss Prevention in the Process Industries，2016，39:121-130.
[5]李刚，胡朋，张洋洋，等.不同弯型管道内粉尘爆炸传播规律［J］.东北大学学报(自然科学版)，2020，41(9):1316-1320.(Li Gang，Hu Peng，Zhang Yang-yang，et al.Propagation law of dust explosion in complex bend pipes［J］.Journal of Northeastern University(Natural Science)，2020，41(9):1316-1320.)
[6]Johansen C T，Ciccarelli G.Visualization of the unburned gas flow field ahead of an accelerating flame in an obstructed square channel［J］.Combustion & Flame，2009，156(2):405-416.
[7]Si R J，Li R Z，Wang L，et al.Experiment study on the propagation laws of gas and coal dust explosion in coal mine［J］.Journal of Coal Science & Engineering，2009，15(3):262-266.
[8]Guo C，Wang C，Xu S，et al.Cellular pattern evolution in gaseous detonation diffraction in a 90°-branched channel［J］.Combustion & Flame，2007，148(3):89-99.
[9]Blanchard R，Arndt D，GrTz R，et al.Explosions in closed pipes containing baffles and 90 degree bends［J］.Journal of Loss Prevention in the Process Industries，2010，23(2):253-259.
[10]Zhu C，Lin B，Jiang B.Flame acceleration of premixed methane/air explosion in parallel pipes［J］.Journal of Loss Prevention in the Process Industries，2012，25(2):383-390.
[11]Zhang S L，Bi M S，Yang M R，et al.Flame propagation characteristics and explosion behaviors of aluminum dust explosions in a horizontal pipeline［J］. Powder Technology，2020，359:172-180.
[12]Gao W，Dobashi R，Mogi T，et al.Effects of particle characteristics on flame propagation behavior during organic dust explosions in a half-closed chamber［J］.Journal of Loss Prevention in the Process Industries，2012，25(6):993-999.
[13]Zhang P L，Du Y，Zhou Y，et al.Explosions of gasoline-air mixture in the tunnels containing branch configuration［J］.Journal of Loss Prevention in the Process Industries，2013，26(6):1279-1284.
[14]解北京，王广宇，董春阳，等.T型管道不同封闭状态瓦斯爆燃火焰传播特征［J］.中国安全生产科学技术，2019(8):19-25.(Xie Bei-jing，Wang Guang-yu，Dong Chun-yang，et al.Flame propagation characteristics of gas deflagration in different closed states of T-shaped pipelines［J］.China Work Safety Science and Technology，2019(8):19-25.)
[15]Li G Q，Du Y，Qi S，et al.Explosions of gasoline-air mixtures in a closed pipe containing a T-shaped branch structure［J］.Journal of Loss Prevention in the Process Industries，2016，43(7):529-536.
[16]蒋新生，魏树旺，何标，等.不同位置分支管道对油气爆炸强度的影响［J］.振动与冲击，2017，36(8):231-236.(Jiang Xin-sheng，Wei Shu-wang，He Biao，et al.The influence of branch pipelines at different locations on the intensity of oil and gas explosions［J］.Vibration and Shock，2017，36(8):231-236.)
[17]Han B，Li G，Yuan C M，et al.Flame propagation of corn starch in a modified Hartmann tube with branch structure［J］. Powder Technology，2020，360(15):10-20.
[18]Pineau J P，Ronchail G.Propagation of coal dust explosionsin pipes［C］/ /Industrial Dust Explosions，ASTM STP958.Pliiladelphia:American Society for Testing and Materials，1987:74-89.
[19]蒋新生，魏树旺，徐建楠，等.分支管道长度对油气爆炸强度影响试验研究［J］.中国安全科学学报，2017，27(2):53-57.(Jiang Xin-sheng，Wei Shu-wang，Xu Jian-nan，et al.Experimental study on the influence of branch pipeline length on the intensity of oil and gas explosion［J］.Chinese Safety Science Journal，2017，27(2):53-57.)(上接第725页)
[2]刘艳华，梁力，任庆新.方钢管橡胶混凝土短柱的轴压力学性能试验［J］.东北大学学报(自然科学版)，2011，32(8):1198-1201，1209.(Liu Yan-hua，Liang Li，Ren Qing-xin.Mechanical properties of rubber concrete-filled square steel tubular stub columns subjected to axial loading ［J］.Journal of Northeastern University(Natural Science)，2011，32(8):1198-1201，1209.)
[3]Yun H，Choi W，Seo S.Acoustic emission activities and damage evaluation of reinforced concrete beams strengthened with CFRP sheets ［J］.NDT and E International，2010，43(7):615-628.
[4]欧佳灵，邵永波.轴压作用下CFRP加固圆钢管混凝土短柱的承载力分析［J］.工程力学，2019，36(10):180-188.(Ou Jia-ling，Shao Yong-bo.Static strength of concrete filled circular CFRP-steel tubular stubs under axial compression ［J］.Engineering Mechanics，2019，36(10):180-188.)
[5]Ding F，Liu J，Liu X，et al.Mechanical behavior of circular and square concrete filled steel tube stub columns under local compression ［J］.Thin-Walled Structures，2015，94:155-166.
[6]Sagar R V，Rao M V.An experimental study on loading rate effect on acoustic emission based b-values related to reinforced concrete fracture ［J］.Construction and Building Materials，2014，70:460-472.
[7]Ma G，Li H.Acoustic emission monitoring and damage assessment of FRP-strengthened reinforced concrete columns under cyclic loading ［J］.Construction and Building Materials，2017，144:86-98.
[8]陈智.FRP-钢管约束混凝土损伤声发射监测及健康诊断［D］.大连:大连理工大学，2015.(Chen Zhi.Acoustic emission monitoring and health diagnosis for damage of hybrid FRP-steel tube confined concrete ［D］.Dalian:Dalian University of Technology，2015.)
[9]Gutenberg B，Richter C F.Frequency of earthquakes in California ［J］.Bulletin of the Seismological Society of America，1994，34(4):185-188.
[10]Degala S，Rizzo P，Ramanathan K，et al.Acoustic emission monitoring of CFRP reinforced concrete slabs ［J］.Construction and Building Materials，2009，23(5):2016-2026.
[11]Aggelis D G，Soulioti D V，Sapouridis N，et al.Acoustic emission characterization of the fracture process in fiber reinforced concrete ［J］.Construction and Building Materials，2011，25(11):4126-4131.