The quantitative studies on gas explosion suppression by an inert rock dust deposit

2018 ◽  
Vol 353 ◽  
pp. 62-69 ◽  
Author(s):  
Yifan Song ◽  
Qi Zhang
Keyword(s):  
Gas Explosion ◽  
Explosion Suppression ◽  
Quantitative Studies ◽  
Dust Deposit ◽  
Rock Dust

Experimental study on gas explosion suppression by coupling CO2 to a vacuum chamber

2018 ◽  
Vol 335 ◽  
pp. 42-53 ◽  
Author(s):  
Chuanbo Cui ◽  
Hao Shao ◽  
Shuguang Jiang ◽  
Xin Zhang
Keyword(s):  
Experimental Study ◽  
Vacuum Chamber ◽  
Gas Explosion ◽  
Explosion Suppression

Coke oven gas explosion suppression

2013 ◽  
Vol 55 ◽  
pp. 81-87 ◽  
Author(s):  
Zengliang Zhang ◽  
Baiquan Lin ◽  
Gemei Li ◽  
Qing Ye
Keyword(s):  
Coke Oven ◽  
Coke Oven Gas ◽  
Gas Explosion ◽  
Explosion Suppression

Numerical Analysis of Water Mist Flow Field for Gas Explosion Suppression in Upper Corner

2011 ◽  
Vol 71-78 ◽  
pp. 4848-4851
Author(s):  
Fan Mao Meng ◽  
Zhi Chao Liu ◽  
Zhi Zhong Liu
Keyword(s):  
Numerical Analysis ◽  
Flow Field ◽  
Coal Mine ◽  
Water Mist ◽  
Gas Explosion ◽  
Gas Concentration ◽  
Methane Gas ◽  
Gas Accumulation ◽  
Explosion Suppression ◽  
Mist Flow

The water mist is an economical and environmental agent for gas explosion suppression. It can be applied in the commonly gas concentration zones and the gas accumulation zones which is difficult to reduce the concentration of methane gas. By numerical analysis, this paper studies the effect of the direction and the number of the nozzles, and the distance form the nozzles to the wall at X direction in upper corner in coal mine. For gas explosion suppression in upper corner, it can use one nozzle which direction is same as the wind and the distance is 2m.

scholarly journals Different Gas Explosion Mechanisms and Explosion Suppression Techniques

2011 ◽  
Vol 26 ◽  
pp. 1467-1472 ◽  
Author(s):  
Zhang Ruming ◽  
Nie Baisheng ◽  
He Xueqiu ◽  
Wang Chao ◽  
Zhao Caihong ◽  
...  
Keyword(s):  
Gas Explosion ◽  
Explosion Suppression

scholarly journals Experimental investigation on micro-dynamic behavior of gas explosion suppression with SiO2 fine powders

2011 ◽  
Vol 1 (3) ◽  
pp. 032004 ◽  
Author(s):  
Xianfeng Chen ◽  
Yin Zhang ◽  
Qingming Zhang ◽  
Shaofeng Ren ◽  
Jianxing Wu
Keyword(s):  
Experimental Investigation ◽  
Dynamic Behavior ◽  
Gas Explosion ◽  
Fine Powders ◽  
Explosion Suppression

Evaluation of propane explosion with applied water mist

2021 ◽  
Vol 39 (6) ◽  
pp. 443-454
Author(s):  
Ping-Jung Li ◽  
Chao-Shi Chen ◽  
Cheng-Yu Weng ◽  
Hsin-Hsiu Ho
Keyword(s):  
Water Mist ◽  
Experimental Results ◽  
Gas Explosion ◽  
Applied Water ◽  
Occurrence Time ◽  
Fuel Concentration ◽  
Explosion Suppression ◽  
Explosion Limit ◽  
Air Speed ◽  
Entrained Air

This article discusses the overpressure of a gas explosion and the performance of applying water mist for explosion suppression. According to the experimental results, the larger the opening area, the more difficult it is for pressure to accumulate, resulting in lower overpressure of a gas explosion. When the opening was opened under a high air speed environment, the amount of entrained air was greater. Consequently, the occurrence time of the explosion was shorter than at a low air speed. Despite the water mist nozzle being installed outside the enclosure, a propane gas explosion still occurred regardless of the amount of water mist used, failing to suppress the explosion. However, the water mist nozzle installed inside the enclosure supplied an adequate amount of water mist that could wash a part of the propane, resulting in the fuel concentration dropping below the lower explosion limit, hindering the occurrence of an explosion.

Research on the SDS + Castor Oil Aqueous Solution Used as Methane Absorption and Gas Explosion Suppression Material

2011 ◽  
Vol 685 ◽  
pp. 264-271
Author(s):  
Zeng Zhi Zhang ◽  
Hong Mei Xu ◽  
Na Gu
Keyword(s):  
Aqueous Solution ◽  
Coal Mine ◽  
Castor Oil ◽  
Volume Fraction ◽  
Explosion Chamber ◽  
Gas Explosion ◽  
Methane Absorption ◽  
Explosion Suppression ◽  
Water Based ◽  
Mine Gas

A kind of water-based material which can absorb mine gas and suppress gas explosion was designed for the purpose of keeping the coal mine safe. The anionic surfactant sodium dodecyl sulfate (SDS) was used as the main gas absorbent according to the micelle solubilization of surfactant, and castor oil was used as absorption enhancer in this material. Methane was regarded as a model of mine gas. The volume fraction of methane absorption was measured by head space gas chromatography. The state of the aggregates in the material was observed by transmission electron microscopy. The explosion suppression effect was tested by self-made explosion chamber which can simulate gas explosion. Also the methane absorption rate of the water-based material was tested in practice of coal mine. The results showed that the maximum volume fraction of methane absorption of the SDS + castor oil aqueous solution can reach up to 12.65%; with the addition of castor oil, the structure of aggregates in SDS aqueous solution system changed from spherical to lamellar, so it can provide greater non-polar microenvironment for methane; the water-based material can lower the maximum explosion pressure to some extent when it was sprayed into the explosion chamber in atomization condition before ignition; field test on methane absorption showed that the methane absorption ratio can reach up to 16.7%, which is much higher than the experimental value.

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