In an intensified fluidized bed processing of wet particles, it is often to use heat transfer immersed tubes to maintain reasonable temperature distribution. The wet particles could adhere to the immersed tubes, which hinders the normal fluidization. We studied the gas-solid flow in a pseudo 2D fluidized bed of wet particles with the presence of immersed tubes, by using CFD-DEM simulation with the hysteretic contact model. The gas-solid flow characteristics around the immersed tubes and the effects of immersed tubes, adhesive force and fluidization velocity on the fluidization of wet particles are analyzed. With the increase of the adhesive force the agglomeration mainly occurs near the bed wall and the channeling mainly appears in the middle of the bed. The immersed tubes can cause the particles to accumulate on the upper surface of the tubes. Also, it can break the bubbles and agglomerates when the fluidization velocity is high. As the fluidization becomes poor, the particle agglomeration becomes more obvious and coordination number increases. The local poor fluidization zone is observed mainly in the gaps between the wall and the immersed tubes.

在湿颗粒的强化流化床处理中，通常使用传热浸没管来维持合理的温度分布。湿的颗粒可能会粘附到浸没的管子上，从而阻碍正常的流化。通过使用带有滞回接触模型的CFD-DEM模拟，我们研究了在存在浸没管的情况下，在湿颗粒的伪二维流化床中的气固流动。分析了沉管周围的气固流动特性，以及沉管，粘附力和流化速度对湿颗粒流化的影响。随着粘附力的增加，附聚主要发生在床壁附近，而窜流主要出现在床的中间。浸没的试管可能导致颗粒积聚在试管的上表面。而且，当流化速度高时，它可能使气泡破裂并结块。随着流化变差，颗粒的团聚变得更明显并且配位数增加。局部较差的流化区主要在壁和沉管之间的间隙中观察到。