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.

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.

Numerical Analysis of Effect of the Number of Nozzles on Water Mist Flow Field for Gas Explosion Suppression

2011 ◽  
Vol 301-303 ◽  
pp. 478-482
Author(s):  
Fan Mao Meng ◽  
Zhi Chao Liu
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
New Technology ◽  
Water Mist ◽  
Theoretical Research ◽  
Gas Explosion ◽  
Explosion Suppression ◽  
Coal Mine Gas ◽  
Mist Flow ◽  
The Relationship

Explosion suppression by water mist is a new technology for the control of coal mine gas explosion with the three elements in the gas explosion at the same time. By building the physical model of the horizontal laneway in mine, and using the method of theoretical research and numerical simulation, this paper studies the relationship between the number of nozzles and H2O percentage and the distance for stable percentage of H2O, and provides a reliable for the design of water mist system for gas explosion suppression in the horizontal laneway in mine.

Effect of Wind Speed to Water Mist in Coal Mine Laneway

2011 ◽  
Vol 71-78 ◽  
pp. 4935-4938 ◽  
Author(s):  
Zhi Chao Liu ◽  
Fu Wei Sun ◽  
Fan Mao Meng
Keyword(s):  
Numerical Analysis ◽  
Wind Speed ◽  
Coal Mine ◽  
Water Mist ◽  
Gas Explosion ◽  
Explosion Suppression ◽  
The Status ◽  
The Relationship

There are many factors which affect the effectiveness of the gas explosion suppression by the water mist in the coal mine laneway. This paper studies the relationship between the wind speed and the status of the water mist by numerical analysis. The results shows, for gas explosion suppression in coal mine laneway, the water mist system must be arranged in the region that the wind speed is 5m/s or slower.

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

The Experimental Study on the Fire Suppression Effectiveness of Water Mist with the FeCl2 Additives

2013 ◽  
Vol 790 ◽  
pp. 53-56
Author(s):  
Chen Jian ◽  
Xu Yan Ying ◽  
Wang Na
Keyword(s):  
Experimental Study ◽  
Fire Suppression ◽  
Water Mist ◽  
Experimental Results ◽  
Additive Concentration ◽  
Experimental Conditions ◽  
Fire Source ◽  
Fire Extinguishing ◽  
Nozzle Position

This paper presents an experimental study of fire suppression effectiveness with water mist containing FeCl2 additives.The investigation focuses on suppression effectiveness under various FeCl2 additives concentrations,working pressures and nozzle different height above the fire source . The experimental results show that: there is a significant impact on fire suppression effectiveness when adding FeCl2 to water mist. There is an optimum additive concentration of extinguishing fire, corresponding to the shortest extinguishing time, the least amount of water, the highest efficiency of extinguishing fire. The nozzle working pressures and nozzle position have effect on the performance of the water mist extinguishing: the greater the pressure is, the shorter water mist fire extinguishing time is. Under the same experimental conditions, the closer the water mist nozzles are to the oil pan, the shorter extinguishing time is.

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

scholarly journals Numerical Simulation and Experimental Study on Formation of High Concentration of H2 Generated by Gas Explosion

2016 ◽  
Vol 23 (s1) ◽  
pp. 131-137 ◽  
Author(s):  
Baiwei Lei ◽  
Bing Wu ◽  
Yatong Zhao ◽  
Muhammad Aqeel Ashraf
Keyword(s):  
Simulation Analysis ◽  
Gradual Increase ◽  
Chemical Kinetic ◽  
Experimental Results ◽  
Gas Explosion ◽  
High Concentration ◽  
Gas Concentration ◽  
Mine Fire ◽  
Spherical Explosion ◽  
Methane Explosion

Abstract In coal mine fire rescues, if the abnormal increase of gas concentration occurs, it is the primary thing to analyze the reasons and identify sources of the abnormal forming, which is also the basis of judge the combustion state of fire area and formulate proper fire reliefs. Nowadays, related researches have recognized the methane explosion as the source of high concentration of H2 formation, but there are few studies about the conditions and reaction mechanism of gas explosion generating high concentration of H2.Therefore, this paper uses the chemical kinetic calculation software, ChemKin, and the 20L spherical explosion experimental device to simulate the generating process and formation conditions of H2 in gas explosion. The experimental results show that: the decomposition of water vapor is the main base element reaction (R84) which leads to the generation of H2.The free radical H is the key factor to influence the formation of H2 generated from gas explosion. With the gradual increase of gas explosion concentration, the explosive reaction becomes more incomplete, and then the generating quantity of H2 increases gradually. Experimental results of 20L spherical explosion are consistent with the change trend about simulation results, which verifies the accuracy of simulation analysis. The results of explosion experiments show that when gas concentration is higher than 9%, the incomplete reaction of methane explosion increases which leads to the gradual increase of H2 formation.

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