采用Aspen Plus V14建立了固定床煤气化炉的稳态流程模型,对脱矿胜利褐煤(SL^(+))及其加氢氧化钠样品(SL^(+)-NaOH)水蒸气气化过程进行模拟研究.依据实验数据对所建模型进行了准确性验证,证明该模型预测的合成气收率与实验值吻合较好....采用Aspen Plus V14建立了固定床煤气化炉的稳态流程模型,对脱矿胜利褐煤(SL^(+))及其加氢氧化钠样品(SL^(+)-NaOH)水蒸气气化过程进行模拟研究.依据实验数据对所建模型进行了准确性验证,证明该模型预测的合成气收率与实验值吻合较好.基于该模型,研究了汽煤比和气化温度对合成气组成和有效气(CO+H_(2))收率的影响.结果表明,SL^(+)气化合成气中有效气摩尔分数随汽煤比的增大先增大后减小,在汽煤比为0.74时达到最大值75.7%.气化温度对两种煤样的有效气组成影响较大.SL^(+)-NaOH中H2和CO_(2)的产量明显增加,而CO产量相较于SL+明显减少.展开更多
The two-dimensional cellular detonation propagating in a channel with area-changing cross section was numerically simulated with the dispersion-controlled dissipative scheme and a detailed chemical reaction model. Eff...The two-dimensional cellular detonation propagating in a channel with area-changing cross section was numerically simulated with the dispersion-controlled dissipative scheme and a detailed chemical reaction model. Effects of the flow ex-pansion and compression on the cellular detonation cell were investigated to illus-trate the mechanism of the transverse wave development and the cellular detona-tion cell evolution. By examining gas composition variations behind the leading shock,the chemical reaction rate,the reaction zone length,and thermodynamic parameters,two kinds of the abnormal detonation waves were identified. To explore their development mechanism,chemical reactions,reflected shocks and rarefac-tion waves were discussed,which interact with each other and affect the cellular detonation in different ways.展开更多
文摘采用Aspen Plus V14建立了固定床煤气化炉的稳态流程模型,对脱矿胜利褐煤(SL^(+))及其加氢氧化钠样品(SL^(+)-NaOH)水蒸气气化过程进行模拟研究.依据实验数据对所建模型进行了准确性验证,证明该模型预测的合成气收率与实验值吻合较好.基于该模型,研究了汽煤比和气化温度对合成气组成和有效气(CO+H_(2))收率的影响.结果表明,SL^(+)气化合成气中有效气摩尔分数随汽煤比的增大先增大后减小,在汽煤比为0.74时达到最大值75.7%.气化温度对两种煤样的有效气组成影响较大.SL^(+)-NaOH中H2和CO_(2)的产量明显增加,而CO产量相较于SL+明显减少.
文摘The two-dimensional cellular detonation propagating in a channel with area-changing cross section was numerically simulated with the dispersion-controlled dissipative scheme and a detailed chemical reaction model. Effects of the flow ex-pansion and compression on the cellular detonation cell were investigated to illus-trate the mechanism of the transverse wave development and the cellular detona-tion cell evolution. By examining gas composition variations behind the leading shock,the chemical reaction rate,the reaction zone length,and thermodynamic parameters,two kinds of the abnormal detonation waves were identified. To explore their development mechanism,chemical reactions,reflected shocks and rarefac-tion waves were discussed,which interact with each other and affect the cellular detonation in different ways.
