A numerical simulation of pulverized coal combustion employing a tabulated-devolatilization-process model (TDP model)
A numerical simulation of pulverized coal combustion employing a tabulated-devolatilization-process model (TDP model)
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DOI：
10.1016/j.combustflame.2011.05.024
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发表时间：
2012
影响因子：
4.4
通讯作者：
Nozomu Hashimoto;R. Kurose;Seung-min Hwang;Hirofumi Tsuji;H. Shirai
中科院分区：
文献类型：
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作者：
Nozomu Hashimoto;R. Kurose;Seung-min Hwang;Hirofumi Tsuji;H. Shirai
建立了一种基于列表脱挥发分过程模型（TDP模型）的煤粉脱挥发分模型，并通过对100 kg煤/h试验炉内工业低NOx燃烧器形成的煤粉燃烧场进行数值模拟，验证了该模型的有效性。将TDP模型与传统的挥发分模型、双竞争反应速率模型和实验结果进行了比较。结果表明，模拟之间的气体流动模式和煤颗粒的行为出现了显着的差异。特别是，再循环流动行为的强烈影响，因为挥发分的演化速率的差异，在煤的挥发分模型的差异。TDP模型比其他模型更好地捕捉了实验中观察到的煤颗粒的行为。虽然认为通过调整脱挥发分参数，也可以通过其它模型进行类似于TDP模型的预测，但是通过采用TDP模型，根据颗粒加热速率自动地对颗粒设定适当的脱挥发分参数，而无需试错法。
A new coal devolatilization model employing a tabulated-devolatilization-process model (TDP model) is developed, and its validity is investigated by performing a numerical simulation of a pulverized coal combustion field formed by an industrial low-NOxburner in a 100kg-coal/h test furnace. The predicted characteristics of the pulverized coal combustion field obtained from the simulation employing the TDP model are compared with those employing the conventional devolatilization model, those employing the two competing reaction rate model, and the experiments. The results show that drastic differences in the gas flow patterns and coal particle behavior appear between simulations. In particular, the recirculation flow behavior is strongly affected by the difference in the coal devolatilization model because of the difference in the volatile matter evolution rate. The TDP model captures the observed behavior of the coal particles in the experiment better than the other models. Although it is considered that by adjusting the devolatilization parameters the prediction similar to the TDP model is also possible by the other models, appropriate devolatilization parameters are automatically set to particles depending on the particle heating rate without trial–error method by employing the TDP model.