环形通风口参数对圆形煤仓气体和粉尘运移的影响  

Influence of annular opening parameters on harmful gas and dust migration in large space circular coal storage dome

作　　者：侯耀华 陈超[1] 周宇[1] 李思成 Hou Yaohua;Chen Chao;Zhou Yu;Li Sicheng(Key Laboratory of Green Built Environment and Energy Efficient Technology,Beijing University of Technology,Beijing 100124,China;China People's Police University,Hebei Langfang 065000,China)

机构地区：[1]北京工业大学绿色建筑环境与节能技术北京市重点实验室,北京100124 [2]中国人民警察大学,河北廊坊065000

出　　处：《消防科学与技术》2022年第10期1367-1371,1375,共6页Fire Science and Technology

基　　金：中国人民警察大学校级科研重点专项(2019sycxpd002)。

摘　　要：根据通风安全理论与基于组分输运模型的CFD方法,探讨圆形煤仓通风安全特性及合适的性能评价指标。以100m直径圆形煤仓为例,研究环形通风口开口方式、位置及几何尺寸等因素对煤粉尘和气体分布、运移特性及去除效率的影响规律,得到最优的通风口设计参数。研究结果表明:单环形开口情况下,通风口由水平改为侧向,可改善内部环境,提高煤粉尘和有害气体的去除效率,推荐侧向环形通风口高度为2 m;在穹顶中部增设环形开口,能够有效减少煤仓上方30~35 m高度处的悬浮污染物量;双环形开口最优位置分别为15,31 m,可使煤仓内部大部分区域粉尘质量浓度低于10 mg/m3,CO_(2)气体质量浓度低于30 mg/m3;排污效率最高均接近80%。研究成果可为超大空间圆形煤仓通风安全设计提供参考。According to the ventilation safety theory and the CFD method based on the component transport model, the ventilation safety characteristics and appropriate performance evaluation indices of the circular coal dome are discussed. Taking the circular coal dome with a diameter of 100 m as an example, the effects of the opening mode, position and geometric size of the circular vent on the distribution, transport characteristics and removal efficiency of coal dust and gas are studied, and the optimal vent design parameters are obtained. The research results show that in the case of single annular opening, the vent is changed from horizontal to lateral, which can improve the internal environment and improve the removal efficiency of pulverized coal dust and harmful gas. The recommended height of the lateral annular vent is 2 m. Adding an annular opening in the middle of the dome can effectively reduce the concentration of suspended pollutants at the height of 30-35 m above the coal dome. The optimal positions of the double ring openings are 15and 31 m respectively, which can make the dust mass concentration in most areas of the coal dome lower than 10 mg/m~3;The mass concentration of CO2gas is lower than 30 mg/m~3;The highest sewage discharge efficiency is nearly 80%.The research results can provide reference for ventilation safety design of super large space circular coal dome.

关 键 词：超大空间圆形煤仓 通风安全 CFD方法 通风口 设计优化 

分 类 号：X913.4[环境科学与工程—安全科学] TU27[建筑科学—建筑设计及理论]