Effect of Water on the Chain Reaction Characteristics of Gas Explosion

Li, Xiangchun; Zhang, Huan; Yang, Chen; Zhao, Jianfei; Bai, Sheng; Long, Yuzhen

doi:10.1021/acsomega.1c00153

Cited by 12 publications

(5 citation statements)

References 18 publications

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“…As for chemical inhibition, KHCO 3 manifested its chemical inhibition mainly by participating in the chain reactions and consuming key radicals during methane explosions. This was shown by the key steps of the methane explosion chain reaction mechanism: …”

Section: Explosion Suppression Mechanismmentioning

confidence: 99%

Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

2022

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To achieve the best explosion suppression effect of an active powder spraying system, the KHCO 3 powder suppression test for a 9.5% methane–air premixed methane explosion was studied based on an independent test platform consisting of a pipe network. The suppression effect of KHCO 3 powder particle size and powder spraying pressure on the methane explosion shock wave pressure, flame wave velocity, and flame wave temperature were studied, and the explosion suppression mechanism was analyzed. The results indicated that both the particle size of the KHCO 3 powder and powder spraying pressure had a significant effect on the explosion inhibition. When the spraying pressure was in the range of 0.1–0.2 MPa, the increase in KHCO 3 powder spraying pressure on the effect of explosion suppression was significantly enhanced, and when the powder spraying pressure exceeded 0.2 MPa, the explosion suppression effect did not obviously increase. With a reduction in the KHCO 3 powder particle size, the effect of explosion suppression significantly improved, and when the KHCO 3 powder particle size was reduced to 50–75 μm, we observed the best shock wave pressure, flame wave velocity, and flame wave temperature suppression effect.

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Section: Explosion Suppression Mechanismmentioning

confidence: 99%

Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

2022

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“…When the gas content surpasses 9.5%, a complete reaction between the gas and oxygen in the mixed air ensues, releasing a significant amount of heat and the most potent form of explosion reaction [17].…”

Section: Gas Contentmentioning

confidence: 99%

Gas explosion early warning method in coal mines by intelligent mining system and multivariate data analysis

Li,

Zhang,

Yang

2023

PLoS ONE

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In order to predict gas explosion disasters rapidly and accurately, this study utilizes real-time data collected from the intelligent mining system, including mine safety monitoring, personnel positioning, and video surveillance. Firstly, the coal mine disaster system is decomposed into sub-systems of disaster-causing factors, disaster-prone environments, and vulnerable bodies, establishing an early warning index system for gas explosion disasters. Then, a training set is randomly selected from known coal mine samples, and the training sample set is processed and analyzed using Matlab software. Subsequently, a training model based on the random forest classification algorithm is constructed, and the model is optimized using two parameters, Mtry and Ntree. Finally, the constructed random forest-based gas explosion early warning model is compared with a classification model based on the support vector machine (SVM) algorithm. Specific coal mine case studies are conducted to verify the applicability of the optimized random forest algorithm. The experimental results demonstrate that: The optimized random forest model has achieved 100% accuracy in predicting gas explosion disaster of coal mines, while the accuracy of SVM model is only 75%. The optimized model also shows lower model error and relative error, which proves its high performance in early warning of coal mine gas explosion. This study innovatively combines intelligent mining system with multidimensional data analysis, which provides a new method for coal mine safety management.

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“…Therefore, a one-dimensional laminar premixed flame model is chosen to solve. The one-dimensional laminar premixed flame model can display the flame structure and calculate the flame velocity. , Therefore, the diffusion transport of components plays an important role in this process …”

Section: Settings Of Experimental Conditions and Simulation Boundary ...mentioning

confidence: 99%

Experimental and Numerical Study of Natural Gas Leakage and Explosion Characteristics

Cai

Liu

et al. 2022

ACS Omega

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Frequent occurrence of indoor natural gas explosion accidents seriously threatens the safety of people and property. To determine the law of indoor natural gas leakage and explosion hazards, based on experiment and simulation, the nature of natural gas explosion, the distribution law of natural gas volume fraction, flame propagation, temperature, and shock wave overpressure were studied. The results show that the flame structure can be divided into three zones, i.e., preheat zone, reaction zone, and product zone. OH + CO ⇔ H + CO 2 is the main exothermic reaction in the combustion process. The overall distribution law of natural gas volume fraction shows that the higher the position, the greater the volume fraction, and the closer the distance to the leak source at the same height, the greater the volume fraction, and the natural gas volume fraction of the hose falling off is the largest under different leakage conditions. The difference in the wrapping structure of the kitchen package has a significant impact on the diffusion distribution of natural gas. The flame development goes through five stages of ignition, slow burning, detonation, slow burning, and extinguishing. The indoor temperature reaches about 1400 °C. Although the simulated value of shock wave overpressure is larger than the experimental value, the relationship between overpressure and distance is expressed by Y = A + B * ln( X + C ). This study can provide certain technical support for natural gas accident rescue. The research can provide certain technical support for natural gas accident rescue and can also be used for accident investigation to form the determination procedure and method of leakage location and leakage amount.

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Effect of Water on the Chain Reaction Characteristics of Gas Explosion

Cited by 12 publications

References 18 publications

Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

Gas explosion early warning method in coal mines by intelligent mining system and multivariate data analysis

Experimental and Numerical Study of Natural Gas Leakage and Explosion Characteristics

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Effect of Water on the Chain Reaction Characteristics of Gas Explosion

Cited by 12 publications

References 18 publications

Study on the Effect of KHCO3 Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

Study on the Effect of KHCO3 Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

Gas explosion early warning method in coal mines by intelligent mining system and multivariate data analysis

Experimental and Numerical Study of Natural Gas Leakage and Explosion Characteristics

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Product

Resources

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Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks

Study on the Effect of KHCO₃ Particle Size and Powder Spraying Pressure on the Methane Explosion Suppression Characteristics of Pipe Networks