摘要
基于商业软件Aspen Plus,运用Gibbs自由能最小化方法建立了气流床部分气化模型,预测气化炉入口参数(空煤比、汽煤比、热损失和碳转换率)对出口合成气的影响特征,模拟结果表明,随空煤比的增大,粗煤气中有效气体成分含量先增大后减少;随汽煤比的增大,粗煤气中H2含量增多,有利于部分煤气化再燃;随碳转换率的增大,粗煤气中有效气体成分含量增加,但提高程度不明显,因此针对部分气化不刻意追求碳转换率.
Based on Aspen Plus, a model for entrained-flow bed coal gasifier partial gasification by the method of Gibbs free energy minimization was established. A series of calculations were carried out to predict the effects of different operation parameters on the performance of syngas. The parameters include air-coal mass ratio, steam-coal ratio and carbon conversion rate in gasifier. The results show that the increasing of air-coal mass ratio can reduce the effective composition in coal gas, which lead to decrease of cold syngas efficiency, while the increasing of steam-coal ratio can enhance H2 volume percentages. It can help NOx reduction with partial gasification reburning. The results also show that the increasing of carbon conversion rate can add the effective composition in coal gas, but the extent of increasing is not obvious. Therefore we can not deliberately pursue carbon conversion rate for partial gasification.
出处
《煤炭转化》
CAS
CSCD
北大核心
2010年第3期29-33,共5页
Coal Conversion
基金
国家高新技术(863)项目(2007AA05Z340)
上海市教委科研创新项目(09YZ212)
上海理工大学研究生创新基金资助项目(5408115001)
关键词
部分气化
空煤比
汽煤比
碳转换率
partial gasification, air-coal mass ratio, steam-coal ratio, carbon conversion rate
