BGL煤气化动力学模型构建与验证  

Construction and verification of BGL coal gasification kinetic model

作　　者：张利合[1,2] 张凡 李昌伦[1] 许德平[1] 徐振刚[2] 王永刚[1] ZHANG Lihe;ZHANG Fan;LI Changlun;XU Deping;XU Zhengang;WANG Yonggang(School of Chemical and Environmental Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China;Research Institute of Coal Chemical Industry,China National Coal Group Corporation,Beijing 100120,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]中国中煤能源集团有限公司煤化工研究院,北京100120

出　　处：《化工学报》2022年第10期4668-4678,共11页CIESC Journal

基　　金：国家自然科学基金项目(42030807)。

摘　　要：在目前节能减排需求下,针对BGL煤气化技术的装备研发与性能优化正越来越受重视。BGL煤气化性能分析和预测仍主要采用平衡模型和整体反应模型,但在预测准确度上仍显不足。本文针对BGL煤气化过程,改进缩核模型,将碳核细分为界面反应区和内部反应区,改善了模型适应性。煤热解气最终产率和组成预测采用装置标定数据和热解数据相结合预测,简化了迭代寻优过程。煤热解层高度预测采用通用热解动力学模型,计算值为1.22 m,较符合实际情况。本文构建的BGL煤气化一维模型计算结果表明:粗煤气组成计算值与标定校核值很接近;烧嘴邻近区气相温度2012℃,颗粒相温度1978℃,与经验估测值一致;粗煤气出口温度549℃,实测粗煤气出口温度约538℃。At the moment of energy saving and emission reduction,more and more attention is paid to the equipment development and performance optimization of the BGL coal gasification technology.The analysis and prediction of BGL coal gasification performance still mainly use the equilibrium model and the overall reaction model,but the prediction accuracy is still insufficient.Aiming at the BGL coal gasification process,the research improves the reduced core model,subdivides the carbon core into the interface reaction zone and the inner reaction zone,and improves the adaptability of the model.The final yield and composition of coal pyrolysis gas are predicted by combining device calibration data and pyrolysis data,which simplifies the iterative optimization process.The general pyrolysis kinetic model is used to predict the height of coal seam,and the calculated value is 1.22 m,which is more in line with the actual situation.The calculation results of BGL one-dimensional coal gasification model constructed in this work show that the calculated value of crude gas composition is very close to the calibration check value.The gas phase temperature near the burner is 2012℃,and the particle phase temperature is 1978℃,which is consistent with the empirical estimation value.The crude gas outlet temperature is 549℃,and the measured crude gas outlet temperature is about 538℃.

关 键 词：煤气化 热解 改进缩核模型 反应动力学 数值模拟 

分 类 号：TQ018[化学工程] TQ546.4