ABSTRACT
A methane and coal dust explosion system was constructed to investigate the propagation of pressure and CO gas after methane and coal dust coupling explosion. The influence of coal dust concentration on the propagation of pressure and CO gas were analyzed by coupling explosion experiments of 5% methane with coal dust (0, 100 g/m3, 200 g/m3, 300 g/m3, 400 g/m3, and 500 g/m3), 7% methane with coal dust (0, 50 g/m3, 100 g/m3, 150 g/m3, and 200 g/m3), and 9% methane with coal dust (0, 50 g/m3, 100 g/m3, 150 g/m3, and 200 g/m3). The experimental results show that when 5% or 7% methane explodes with coal dust in the explosion chamber, the pressure first increases and then decreases with the increase of coal dust concentration. When the methane concentration is 9%, the pressure decreases with the increase of coal dust concentration. In the propagation pipe, the explosion pressure and CO gas concentration decrease with the increase of distance. When the methane concentration and distance are constant, the higher the coal dust concentration is, the higher the pressure and CO gas concentration is.
KEYWORDS
PAPER SUBMITTED: 2021-10-10
PAPER REVISED: 2021-12-02
PAPER ACCEPTED: 2021-12-15
PUBLISHED ONLINE: 2022-02-05
THERMAL SCIENCE YEAR
2022, VOLUME
26, ISSUE
Issue 5, PAGES [3859 - 3867]
- Zhu, Y .F. , et al., A statistical analysis of coalmine fires and explosions in china. Process Safety and Environmental Protection, 121 (2019), pp .357 - 366
- Kurnia J . C ., et al. , Introduction and evaluation of a novel hybrid brattice for improved dust control in underground mining faces: A computational study , International Journal of Mining Science and Technology , 25 ( 2015 ) ,4,pp. 537 - 543
- Yang, C., et al., Statistical analysis and countermeasure s of gas explosion accident in coal mines , Procedia Eng. 84 (2014),pp. 166 - 1 71.
- Kundu, S., et al. , Explosion severity of methane - coal dust hybrid mixtures in a ducted spherical vessel , Powder Technology, 323 (2018),pp. 95 - 102
- Rockwell, S.R., Rangwala, A.S. , In fluence of coal dust on premixed turbulent methane - air flames. Combust , Flame, 160 (2013),pp. 635 - 640
- Qi Y .Q. , et al. , Variation and prediction methods of the explosion characteristic parameters of coal dust/gas mixtures , Energies, 14 (2021),2,pp. 264
- Song S .X . , et al. , Hybrid CH4/coal dust explosions in a 20 - L spherical vessel , Process Safety and Environmental Protection, 122 (2019),pp. 281 - 287
- Zhao P . , et al. , Minimum explosion concentration of coal dusts in air with small amount of CH4/H2/CO under 10 - kJ igniti on energy conditions , Fuel, 260 (2020),pp. 116401 - 116401
- Ajrash M . J . , et al., The flame deflagration of hybrid methane coal dusts in a large - scale detonation tube (LSDT) , Fuel, 194 (2017), 15 ,pp. 491 - 502
- Cashdollar K . L. , Overview of dust explosibility charact eristics , Journal of Loss Prevention in the Process Industries, 13 (2000),pp. 183 - 199
- Deng J . , et al. , Experimental data revealing explosion characteristics of methane, air, and coal mixtures , RSC Advances, 9 (2019),42,pp.24627 - 24637
- Zhang L . L. , et al. , Infl uences of a pipeline's bending angle on the propagation law of coal dust explosion induced by gas explosion , Combustion Science and Technology, 193 (2021), 6 ,pp. 1 - 14
- Song Y .F , Zhang Q. , Multiple explosions induced by the deposited dust layer in enclosed pipe line , Journal of Hazardous Materials, 371 (2019) 5 ,pp. 423 - 432.
- Song Y .F. , et al., Interaction between gas explosion flame and deposited dust , Process Safety and Environmental Protection, 111 (2017),pp. 775 - 784
- Song Y .F. , et al., Explosion energy of methane/de posited coal dust and inert effects of rock dust , Fuel, 228 (2018), 15 ,pp. 112 - 122
- Jiang B .Y. , et al. , Effects of changes in fuel volume on the explosion - proof distance and the multiparameter attenuation characteristics of methane - air explosions in a semi - con fined pipe , Journal of Loss Prevention in the Process Industries, 39 (2016),pp. 17 - 23
- Jiang B .Y. , et al., Multiparameter acceleration characteristics of premixed methane/air explosion in a semi - confined pipe , Journal of Loss Prevention in the Process Industr ies, 49 (2017),pp. 139 - 144
- Niu Y .H. , et al. , Methane - coal dust mixed explosion in transversal pipe networks , Combustion Science and Technology, 193 (2020), 10 ,PP. 1734 - 1746
- Li Y . , ET AL., Experimental Study on the Influence of initial pressure on explosion of m ethane - coal dust mixtures , Procedia Engineering, 62 ( 2013 ),PP. 980 - 984
- Guo C .w., et al. , Effect of low - concentration coal dust on gas explosion propagation law , Powder Technology, 367 (2020),pp. 243 - 252
- Pinaev A V , Pinaev P A . Combustion and Detonation Waves in Gas Mixtures of CH4/Air, CH4/O2, and O2/Coal Dust , Combustion Explosion and Shock Waves, 56 (2020), 6 ,pp. 670 - 681
- Li Q .Z. , et al. , Experimental analysis on post - explosion residues for evaluating coal dust explosion severity and flame propagation behaviors , Fuel, 215 (2018),pp. 417 - 428
- Lin S . , et al. , Flammability and explosion risk of post - explosion CH4/air and CH4/coal dust/air Mixtures , Combustion Science and Technology, 193 (2019), 10 ,pp. 1279 - 1292
- Nie B .S. , et al. , Experimental analysis on gas and solid res idues of pre - and post - explosion coal dust , Energy and Fuels, 35 (2021), 2 ,pp. 1727 - 1740
- Liu Z .T. , et al. , A study of the characteristics of gaseous and solid residues after coal dust explosions , Combustion Science and Technology, 189 (2017), 9 ,pp. 1639 - 1658
- Liu Z .T. , et al. , Experimental investigations on explosion behaviors of large - particle and formation rules of gas residues , Journal of Loss Prevention in the Process Industries, 46 (2017),pp. 37 - 44
