Simulation Study on the Influence of Chimney Structure on the Efficiency of Gravity Heat Pipes for Controlling Spontaneous Combustion in Coal Waste Rock Piles

Xie, Aihao; Zhang, Bailin; Zhang, Xinghua; Zhang, Yanxin; Cao, Zekun

doi:10.1080/00102202.2024.2320705

Combustion Science and Technology

2024

DOI: 10.1080/00102202.2024.2320705

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Simulation Study on the Influence of Chimney Structure on the Efficiency of Gravity Heat Pipes for Controlling Spontaneous Combustion in Coal Waste Rock Piles

Aihao Xie,

Bailin Zhang,

Xinghua Zhang

et al.

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2024

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Cited by 2 publications

References 26 publications

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Study on Natural Characteristics of Coal Gangue Oxidation under the Action of Water

Zheng,

Gan,

Jia

et al. 2024

ACS Omega

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The exposed accumulation of coal gangue undergoes changes when it is soaked by rainwater, exhibiting varying tendencies for spontaneous combustion in different precipitation regions. This study investigates the effects of moisture on the oxidation and spontaneous combustion of coal gangue in highsulfur coal gangue from the Qipanjing area of Inner Mongolia. Initially, coal gangue samples were subjected to soaking and air-drying treatments at different moisture contents. The dried coal gangue samples were then placed into a self-designed programmable heating furnace for thermal experiments, during which the gases generated were collected and characterized using gas chromatography. By comparing the oxygen consumption and volume fractions of gases such as CO, CH 4 , and C 2 H 6 produced from coal gangue treated at different moisture contents, it was found that the low-temperature oxidation characteristics were optimal at a moisture content of 25%. At this level, the initial formation temperatures of gases like CO, CH 4 , and C 2 H 6 were the lowest, with peak concentrations observed at 390 °C. Conversely, when the moisture content exceeded 70%, a significant amount of combustible material in the coal gangue was dissolved and dispersed by water, leading to a marked decrease in the concentrations of indicator gases produced at 390 °C. In fact, these concentrations fell below those of the control group, which was not subjected to water soaking or subsequent drying. The water immersion treatment also lowered the initial temperature points for the generation of various indicator gases by approximately 15 °C, making spontaneous combustion more likely.

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Study on Natural Characteristics of Coal Gangue Oxidation under the Action of Water

Zheng,

Gan,

Jia

et al. 2024

ACS Omega

View full text Add to dashboard Cite

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Impact of chimney structure and ambient wind on heat pipe heat dissipation

Zhang,

Yang,

Zhang

et al. 2024

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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Simulation Study on the Influence of Chimney Structure on the Efficiency of Gravity Heat Pipes for Controlling Spontaneous Combustion in Coal Waste Rock Piles

Cited by 2 publications

References 26 publications

Study on Natural Characteristics of Coal Gangue Oxidation under the Action of Water

Study on Natural Characteristics of Coal Gangue Oxidation under the Action of Water

Impact of chimney structure and ambient wind on heat pipe heat dissipation

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