Investigation of methane/air explosion suppression by modified montmorillonite inhibitor

Yu, Minggao; Wang, Xueyan; Zheng, Kai; Han, Shixin; Chen, Chuandong; Rong-jun, SI; Wang, Lei

doi:10.1016/j.psep.2020.07.050

Cited by 58 publications

(10 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experts and scholars worldwide have conducted active powder spraying explosion suppression system research and have focused mainly on powder explosion suppressants, such as SiO 2 , NH 4 H 2 PO 4 , NaHCO 3 , Al(OH) 3 , KHCO 3 , urea, ferrocene, diatomaceous earth, and montmorillonite, which contain sodium or potassium salts compounds that exhibit good inhibitory effects. − KHCO 3 , one of the most common fire extinguishing agents in recent years, is inexpensive, has an environmentally friendly decomposition product after heating, has superior fire extinguishing properties, has chemical stability, and is not susceptible to chemical reactions with other organic or inorganic substances. − Thus, it has been studied by scholars worldwide as a representative explosion inhibitor. KHCO 3 has often been used to inhibit nano PMMA dust, aluminum powder, and industrial dust explosions.…”

Section: Introductionmentioning

confidence: 99%

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

2022

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

2022

View full text Add to dashboard Cite

show abstract

“…After the fine water mist was coupled with the inert gas to suppress the explosion, the overall changing process of the pressure shock wave at the two monitoring points was similar to each of the monitoring points in branch pipes 1 and 2, with single-peak characteristics . Under the working conditions of 7% KCl fine water mist-25% N 2 and 7% KCl fine water mist-20% CO 2 , the peak overpressure values at monitoring point 5 were 0.22 and 0.12 MPa, respectively.…”

Section: Resultsmentioning

confidence: 91%

Study on Methane Explosion Suppression in Diagonal Pipe Networks Using a Fine Water Mist Containing KCl and an Inert Gas

2022

View full text Add to dashboard Cite

To explore an effective approach for suppressing methane explosions in actual pipe networks, we used a custom-made diagonal pipe network experimental system to assess the suppression of methane explosions using a fine water mist containing KCl and an inert gas. The shock wave pressure, flame wave velocity, and flame wave temperature under different suppression conditions were compared to characterize the effects of explosion suppression under different working conditions, and the mechanism of explosion suppression was analyzed. The results showed that under single-factor explosion suppression conditions the optimal explosion suppression results were achieved when the volume fraction of N 2 was 25%, the volume fraction of CO 2 was 20%, and the concentration of KCl was 7%. The suppression effect of CO 2 on the flame wave temperature was better than fine water mist containing KCl and N 2 , and the suppression effect of fine water mist containing KCl on the shock wave overpressure and flame wave velocity was more significant. Under the working conditions of fine water mist containing KCl, which was coupled with an inert gas to suppress the explosion, the suppression effect of the fine water mist containing KCl coupled with 20% CO 2 on the shock wave overpressure, flame wave velocity, and flame wave temperature was considerably better than fine water mist containing KCl coupled with 25% N 2 .

show abstract

“…Montmorillonite is an abundant magnesiumaluminosilicate mineral with a large specific surface area and a layered pore structure, which has good endothermic properties in suppressing the explosion of combustible gases. 23 Existing research has shown that montmorillonite powder has excellent suppression properties for methane explosion. 24,25 The transportation and utilization of methane in daily production are often carried out in a pipe network.…”

Section: Introductionmentioning

confidence: 99%

Suppression of methane explosion in a pipe network by carbon dioxide‐driven montmorillonite powder with different masses

Fengxiao

Jia

Xiuyuan

2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary Methane explosion is a major threat to modern industrial safety. An explosion suppression experiment that uses montmorillonite powder with different masses driven by carbon dioxide was conducted in an independently built pipe network. The performance of different parameters was characterized by peak explosion overpressures, explosion power indexes, and times for the flame wave to reach the outlet of the pipe network. Additionally, the explosion suppression mechanism was analyzed. The results demonstrated that increasing the powder mass from 20 to 50 g gradually enhanced the explosion suppression performance, while the performance slightly increased when the powder mass increased to 60 g. Therefore, from the perspective of practical application, energy conservation, and environmental protection, selecting 50 g of montmorillonite powder can thoroughly suppress methane explosions, indicating the best performance. The conclusions of this study can provide theoretical support for improving safety in industrial transportation that uses methane and effectively mitigating disaster risk.

show abstract

Investigation of methane/air explosion suppression by modified montmorillonite inhibitor

Cited by 58 publications

References 62 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

Study on Methane Explosion Suppression in Diagonal Pipe Networks Using a Fine Water Mist Containing KCl and an Inert Gas

Suppression of methane explosion in a pipe network by carbon dioxide‐driven montmorillonite powder with different masses

Contact Info

Product

Resources

About

Investigation of methane/air explosion suppression by modified montmorillonite inhibitor

Cited by 58 publications

References 62 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

Study on Methane Explosion Suppression in Diagonal Pipe Networks Using a Fine Water Mist Containing KCl and an Inert Gas

Suppression of methane explosion in a pipe network by carbon dioxide‐driven montmorillonite powder with different masses

Contact Info

Product

Resources

About

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