Inhibition characteristics of coal dust explosion at the gasification atmosphere

Liang, Guangqian; Dai, Huaming; Yin, Hepeng; Zhao, Qi; Chen, Xianfeng

doi:10.1016/j.apt.2021.08.026

Cited by 24 publications

(4 citation statements)

References 39 publications

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“…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

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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: 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

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“…Moreover, this proportion is still on the rise, causing a huge labor loss to the country (Nie et al 2022, Zhou et al 2022a. Additionally, the increased concentration of coal dust in underground coal mines exacerbated dangerous coal dust explosions, causing serious harm to miners (Liang et al 2021, Wang et al 2020. Therefore, there is an urgent need for high-efficiency and low-cost technologies to solve the problem of high dust concentration in coal mine.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on a novel double Y-shaped filter and its dust removal characteristics

Jiang

Yuan

et al. 2023

Preprint

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For efficient and energy-saving purification of underground coal dust, a double Y-shaped filter device with a pneumatic fan as the power source was presented and tested. Numerical simulation results showed that the dust removal resistance of the double Y-shaped filter was lower than that of the conventional parallel filter. Next, filtration performance was evaluated and the morphology of water film on the filter was analyzed. It was discovered that a moderate filtration velocity was beneficial in increasing dust removal efficiency and the density of the fiber grid was proportional to the dust removal efficiency of the equipment. Conversely, an excess filtration velocity will increase the dust removal resistance and decrease the dust removal performance. According to quality factor evaluation, the optimum performance parameters for this equipment were 60 mesh density fiber grid, 0.6 MPa spray pressure, and 5 m/s filtration velocity. Under these conditions, the dust removal efficiency was 98.2%, and the dust removal resistance was 169.6 Pa. The results obtained in this study showed that this device can provide a new idea for efficient, low resistance and dust removal without electricity in underground coal mines.

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“…In previous research, the authors got the ignition characteristics of dust and flame characteristics and also discussed the propagation process of toxic gas products in the explosion flow field. − However, the research on the suppression is still insufficient. Previous scholars’ research mainly focused on the explosion suppression of lignite dust. − Therefore, this paper selected long flame coal as the research object to analyze the suppression effect of different explosion suppressants on its explosion pressure. Long flame coal has a higher degree of metamorphism than lignite and is also the least metamorphosed bituminous coal.…”

Section: Introductionmentioning

confidence: 99%

“…Previous scholars’ research mainly focused on the explosion suppression of lignite dust. 37 − 39 Therefore, this paper selected long flame coal as the research object to analyze the suppression effect of different explosion suppressants on its explosion pressure. Long flame coal has a higher degree of metamorphism than lignite and is also the least metamorphosed bituminous coal.…”

Section: Introductionmentioning

confidence: 99%

Research on Explosion Pressure Characteristics of Long Flame Coal Dust and the Inhibition Effect of Different Explosion Suppressants

Liu,

Gao,

et al. 2023

ACS Omega

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To discuss the inhibition of long flame coal dust explosion pressure, NaHCO3, KHCO3, and NH4H2PO4 are selected as explosion suppression dust for explosion pressure tests under different conditions. The results show that when 25–38 and 38–45 μm coal dust are mixed in 1:1 ratio, the maximum explosion pressure is the largest, the maximum pressure is 0.79 MPa, and the maximum pressure rise rate is 74.89 MPa·s–1. The suppression dusts have good inhibition effect on explosion, the order of inhibition is NaHCO3, KHCO3, and NH4H2PO4 from the smallest to the largest. With the reduction of particle size of NH4H2PO4, its inhibition effect on explosion pressure is increasing, because more NH4H2PO4 particles move around coal dust particles, blocking the heat transfer and kinetic energy exchange. The above three suppression dust and their suppression methods can provide important data for dust prevention and control and have certain reference significance for carrying out explosion suppression work.

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Inhibition characteristics of coal dust explosion at the gasification atmosphere

Cited by 24 publications

References 39 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

Experimental study on a novel double Y-shaped filter and its dust removal characteristics

Research on Explosion Pressure Characteristics of Long Flame Coal Dust and the Inhibition Effect of Different Explosion Suppressants

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Inhibition characteristics of coal dust explosion at the gasification atmosphere

Cited by 24 publications

References 39 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

Experimental study on a novel double Y-shaped filter and its dust removal characteristics

Research on Explosion Pressure Characteristics of Long Flame Coal Dust and the Inhibition Effect of Different Explosion Suppressants

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