摘要
提出一种利用稳态热力学模型加高度离散化网格的有限元方法,采用C#语言编制了高效计算软件,成功地模拟了烧结矿零排放工况下复杂的非稳态热力学过程,模拟结果与现场实测数据基本吻合。结果表明:低温废气循环至中温段利用对烧结矿冷却终点温度有显著影响;采用偏析布料、延长冷却时间并提高料层厚度等措施改善效果不明显,说明换热接近平衡状态;采用加大风量、减少气流偏析、改变循环模式等增加冷却介质的方法,改善效果明显,印证了上述推断。
The finite element method of steady state thermodynamics model and highly discretized grid is proposed,the high efficient computer software is programmed in C# language,the complex unsteady state thermodynamics process under zero emission working condition of sinter is successfully simulated,and the simulation results basically accord with the field measurement data.The results show that,low temperature exhaust gas recycling to medium temperature section waste gas utilization has significant effect on the sinter cooling end point temperature.Little improvement effects are achieved by such measures as adopting segregation distribution of sinter,prolonging cooling time and increasing material bed depth etc.,which shows that the heat transfer is close to equilibrium state.However,the improvement effect is obvious by increasing air volume,reducing air segregation and changing circulation pattern etc.,which proves the abovementioned conclusion.
引文
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