基于计算流体动力学的煤炭地下气化过程数值模拟  

Numerical Simulation of Underground Coal Gasification Process Based on Computational Fluid Dynamics

作　　者：黄敏[1] 刘秀敏[2] 贾民[3] HUANG Min;LIU Xiumin;JIA Min(I.Guangzhou Nanyang Polytechnic,Guangzhou 510980,China;State Key Laboratory of Rock and Soil Mechanics and Engineering,Wuhan Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;Jining No.2 Coal Mine,Yanzhou Coal Mining Co.,Ltd.,lining 272000,China)

机构地区：[1]广州南洋理工职业学院,广东广州510980 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [3]兖州煤业股份有限公司济宁二号煤矿,山东济宁272000

出　　处：《煤矿安全》2018年第7期142-146,共5页Safety in Coal Mines

基　　金：国家自然科学基金青年科学基金资助项目(41602325)

摘　　要：为了对煤炭地下气化过程产生的混合物气体组分进行有效分析,在一个给定的几何结构和煤块均匀分布条件下,采用计算流体动力学理论建立了一个固定床煤炭地下气化过程的三维数理模型。该模型中的反应器考虑了气固两相流动,并生成了离散化数值网格。采用气相运动k-ε湍流模型,利用ANSYS/Fluent软件对该模型的技术参数进行了分析。以定性和定量的形式对煤气化过程的气体组分(CH_4、CO_2、CO和H_2)进行了实验分析,结果表明:提出数值模型得到的组分计算值与实测值吻合较好,平均相对误差12.17%。此外基于获得的相关性系数验证了提出数值模型的适用性。In order to effectively analyze the gas components of the mixture produced by the underground coal gasification process,a three-dimensional（3D） mathematical model of the underground gasification process of the fixed bed coal is established using the computational fluid dynamics theory under the uniform distribution of a given geometric structure and coal block. The reactor in this model considers gas-solid two-phase flow and generates a discrete numerical grid. The gas-phase k-ε turbulence model was used to analyze the technical parameters of the model using ANSYS/Fluent software. The gas components（CH_4, CO_2, CO and H_2） in the coal gasification process were analyzed qualitatively and quantitatively. The results show that the calculated values of the components obtained from the numerical model agree well with the measured values, and the average relative error is 12.17%.In addition, the applicability of the proposed numerical model is verified based on the obtained correlation coefficient.

关 键 词：计算流体动力学 煤炭地下气化 氧-水蒸气气化 数值模拟 湍流模型 

分 类 号：TD713[矿业工程—矿井通风与安全]