基于Aspen Plus的热解粉焦气流床气化过程模拟与分析  

Simulation and Analysis of Pyrolytic Coke Fine Entrained Flow Gasification Process Based on Aspen Plus

作　　者：张志刚 段明哲 宋一鸣[2] 张栋博 张晶 

机构地区：[1]陕西煤业化工技术研究院有限责任公司,陕西西安710065 [2]西北大学,陕西西安710069

出　　处：《煤化工》2015年第6期10-13,共4页Coal Chemical Industry

摘　　要：以热解粉焦为原料,利用Aspen Plus模拟软件,建立了气化炉模型,在修正和验证的基础上,进行了气化过程的模拟计算,同时考察了影响气化过程的主要指标。结果表明,利用Aspen plus软件建立的模型,能够准确模拟气流床气化过程,计算误差在许可范围内;热解粉焦较热解用煤更适宜于气流床气化,热解粉焦气化粗合成气中有效气的体积分数达到95.6%,冷煤气效率为80.6%;气化压力的提高使得合成气中甲烷含量升高,但对反应温度和有效合成气含量影响较小;氧焦比和蒸汽焦比对气化温度和合成气组成有重要影响,其中,实验用热解粉焦的最佳氧焦比为0.81 kg/kg^0.84 kg/kg,最佳蒸汽焦比为0.09 kg/kg^0.11 kg/kg。With pyrolytic coke fine as raw material, a gasifier model was established on Aspen Plus platform. On the basis of modification and validation, a gasification process simulation was carried out. At the same time, the effects of pressure,oxygen to coke ratio and steam to coke ratio on the gasification process were investigated. The results showed that the model could accurately simulate the entrained flow gasification, and the calculation results accorded with experimental data within allowed error. Pyrolytic coke fine was more suitable for entrained flow gasification process than pyrolytic raw coal. The volume fraction of effective gas in crude syngas was 95.6%, and cold gas efficiency reached 80.6%. In the process of pyrolytic coke fine gasification, methane in syngas increased with increasing pressure, but pressure had less influence on operation temperature and effective gas content. Oxygen-to-coke ratio and steam-to-coke ratio had a great influence on operation temperature and syngas composition. In this simulation, the optimal oxygen-to-coke ratio was 0.81 kg/kg-0.84 kg/kg and steam-to-coke ration was 0.09 kg/kg-0.11 kg/kg.

关 键 词：ASPEN Plus 热解粉焦 粉煤 气流床气化 模拟 

分 类 号：TQ546[化学工程—煤化学工程]