本文采用微波加热-红外热成像颗粒示踪和混合技术获得了球形颗粒、柱形轻质颗粒和柱形重质颗粒三种示踪颗粒在不同操作参数下的运动轨迹,同时,基于蒙特卡罗方法的基本思想,将颗粒停留时间分布转化为虚拟颗粒浓度,并通过考察分层界面高度和混合层高度两个特征参数研究了球形-非球异质颗粒系统的颗粒分离特性.结果表明,当操作气速达到球形颗粒的最小流化速度时,床层发生逆转;随后随流化气速增加,分层界面高度降低,但球形颗粒与重质颗粒的分层界面下降更明显,混合层高度均增加;在同一流化气速下,柱形重质颗粒-柱形轻质颗粒混合域最小.
参考文献
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