陕西煤炭2024，Vol.43Issue(7)：24-29,6.DOI:10.20120/j.cnki.issn.1671-749x.2024.0705
基于数值模拟的锥形煤仓积煤自燃特征
Characteristics of coal spontaneous combustion in conical coal bunker based on numerical simulation
钟越峰 1赵婉婷 2张振亚3
作者信息
- 1. 宁波众茂杭州湾热电有限公司,浙江宁波 315300
- 2. 宁波工程学院安全工程学院,浙江宁波 315211
- 3. 宁波工程学院建筑与交通工程学院,浙江宁波 315211
- 折叠
摘要
Abstract
Coal bunker self-ignition area has strong concealment and is difficult to extinguish.To clarify the influence of dy-namic stacking and changes in air volume on oxidative spontaneous combustion of coal in a conical coal bunker,a multi-field coupled numerical simulation model is developed using COMSOL software for gas-solid two-phase flow,coal dynamic reten-tion and stacking,and slow calefactive oxidation during coal hopper feeding.The results show that there is a positive correla-tion between the air leakage and the increase in oxygen concentration at the range of 0.2～3.0 m3/h of air volume.The lar-ger the air leakage volume,the more thorough the oxidation of accumulated coal,and the stronger the risk of spontaneous combustion.The increase of accumulated coal thickness and air leakage volume can significantly boost the danger of coal combustion in the coal hopper.There is a clear tendency for spontaneous combustion of the coal accumulated in the coal hopper when the accumulated coal is thicker than 3 m and the air volume is greater than 0.3 m3/h.关键词
锥形煤仓/煤自燃/积煤厚度/风量Key words
conical coal bunker/coal spontaneous combustion/coal accumulation thickness/air volume分类
矿业与冶金引用本文复制引用
钟越峰,赵婉婷,张振亚..基于数值模拟的锥形煤仓积煤自燃特征[J].陕西煤炭,2024,43(7):24-29,6.
