基于COMSOL的炉体内煤氧化反应数值模拟  

Numerical simulation of coal oxidation reaction in coal oxidation furnace based on COMSOL

作　　者：郭天宁 曾强[1,2,3] GUO Tianning;ZENG Qiang(School of Ecology and Environment,Xinjiang University,Urumqi 830046,China;Institute of Arid Ecological Environment,Xinjiang University,Urumqi 830046,China;Key Laboratory of Aasis Ecology,Ministry of Education,Xinjiang University,Urumqi 830046,China)

机构地区：[1]新疆大学生态与环境学院,新疆乌鲁木齐830046 [2]新疆大学干旱生态环境研究所,新疆乌鲁木齐830046 [3]新疆大学绿洲生态教育部重点实验室,新疆乌鲁木齐830046

出　　处：《矿业安全与环保》2023年第1期9-13,共5页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(51974275);新疆“煤火灾害治理”天山创新团队项目(2021D14018)。

摘　　要：为了探究煤燃烧过程中温度、氧化产物、反应物的分布规律,通过COMSOL 5.5数值模拟软件建立煤氧化炉体模型,基于新疆准东煤矿煤属性数据,模拟自然升温与加热及不同压差条件下,炉体内温度、O_(2)及氧化产物(CO、CO_(2))的浓度分布特征。结果表明:压差增大,炉体内温度及氧化产物浓度降低,反应末期高温区域位置升高;同一压差下,氧化产物浓度随监测点轴向位置升高而增大,煤氧化炉体中心温度较高;径向方向,氧化产物浓度与对应位置的温度呈正相关关系;加热8 h能显著提高反应速率。In order to explore the distribution law of temperature, oxidation products and reactants in the process of coal combustion. In this paper, the model of coal oxidation furnace was established by COMSOL 5.5 numerical simulation software. Based on the coal attribute data of Zhundong Coal Mine in Xinjiang Province, the distribution characteristics of temperature, O2and concentration of oxidation products(CO and CO2) in furnace under natural heating and heating and different pressure difference conditions were simulated. The results show that with the increase of pressure difference, the temperature in furnace and the concentration of oxidation products decrease, and the position of high temperature region at the end of reaction increases. Under the same pressure difference, the concentration of oxidation products increases with the increase of the axial position of the monitoring point, and the temperature of the furnace center is higher. In the radial direction, the concentration of oxidation products is positively correlated with the temperature at the corresponding location. Heating for 8 h can significantly improve the reaction rate.

关 键 词：煤自燃 数值模拟 燃烧产物 分布特征 达西定律 多孔介质传热 

分 类 号：TD84[矿业工程—煤矿开采]