[1]陈靖琪,侯耀华,李思成,等.圆形煤仓甲烷浓度特性及其自然通风效果优化研究*[J].中国安全生产科学技术,2025,21(7):70-77.[doi:10.11731/j.issn.1673-193x.2025.07.009]
CHEN Jingqi,HOU Yaohua,LI Sicheng,et al.Research on methane concentration characteristics in circular coal storage and optimization of natural ventilation effectiveness[J].Journal of Safety Science and Technology,2025,21(7):70-77.[doi:10.11731/j.issn.1673-193x.2025.07.009]
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圆形煤仓甲烷浓度特性及其自然通风效果优化研究*
CHEN Jingqi,HOU Yaohua,LI Sicheng,et al.Research on methane concentration characteristics in circular coal storage and optimization of natural ventilation effectiveness[J].Journal of Safety Science and Technology,2025,21(7):70-77.[doi:10.11731/j.issn.1673-193x.2025.07.009]
《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]
- 卷:
- 21
- 期数:
- 2025年7期
- 页码:
- 70-77
- 栏目:
- 职业安全卫生管理与技术
- 出版日期:
- 2025-07-30
文章信息/Info
- Title:
- Research on methane concentration characteristics in circular coal storage and optimization of natural ventilation effectiveness
- 文章编号:
- 1673-193X(2025)-07-0070-08
- Keywords:
- circular coal storage; methane accumulation; natural ventilation; numerical simulation; scaled model experiment; ventilation configuration optimization
- 分类号:
- X962
- 文献标志码:
- A
- 摘要:
- 为保障储煤仓存储安全，优化通风效果，降低甲烷积聚风险，实测分析圆形煤仓的自然通风条件及甲烷体积分数特性，并结合经验证的CFD数值模拟和缩尺模型试验方法，研究通风口结构参数对圆形煤仓自然通风性能及气态示踪剂去除效果的影响。研究结果表明：圆形煤仓通风主要依赖于风压通风，内外温度场相对均匀，部分场所甲烷体积分数超0.5%。当提高侧向根部环形通风口位置时，通风量增加约20%；增加环形通风口数量时，通风量增加约90%，气态示踪剂的去除时间缩短，通风效果显著提升。煤堆释放可燃气体主要沿纵向扩散，外部风流形成沿外壁的绕流现象，内部存在沿风流方向的旋涡。通风效果顺序为：双环形通风口>侧向单环形通风口>水平通风口。研究结果可为储煤设施自然通风优化设计提供理论支撑和技术指导。
- Abstract:
- In order to ensure storage safety in coal bunkers,optimize ventilation effectiveness,and mitigate methane accumulation risks,this study conducted field measurements to analyze natural ventilation conditions and methane volume fraction characteristics in circular coal storage facilities.Utilizing validated CFD numerical simulations and scaled model experiments,it investigated the effects of vent configuration parameters on both natural ventilation performance and gaseous tracer removal efficiency.Results indicate that circular coal storage ventilation primarily depends on wind-driven ventilation with relatively uniform internal and external temperature fields.Methane volume fractions exceeded 0.5% in specific zones.Elevating the position of lateral root annular vents increased ventilation volume by approximately 20%.Increasing annular vent quantity boosted ventilation volume by approximately 90%,while significantly reducing gaseous tracer removal time and enhancing ventilation effectiveness.Coal pile-released combustible gases diffuse mainly longitudinally,with external airflow forming circumferential flow along the outer walls and internal vortex structures developing along the airflow direction.Ventilation effectiveness follows this hierarchy: dual annular vents > lateral single annular vent > horizontal vents.These findings provide theoretical foundations and technical guidance for optimizing natural ventilation design in coal storage facilities.
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相似文献/References:
备注/Memo
- 备注/Memo:
-
收稿日期： 2025-03-25
* 基金项目： 中央高校基本科研业务费专项资金项目（JJPY202401）
作者简介： 陈靖琪，硕士研究生，主要研究方向为通风安全与灭火系统。
通信作者： 侯耀华，博士，副教授，主要研究方向为通风排烟与消防设施。
