一、概述目前,流化床已广泛应用于煤的气化、沸腾锅炉、工业废气余热回收、流动粒子炉和化学反应器等设备中。为提高这些设备的使用性能和效率,一个共同的要求,就是要使流化床处于良好的流化状态。尽管流化床的良好流化状态还难以精确定义。但是,一般而言,良好的流化状态应该是气流分布均匀,床层中具有良好的传热 I. Overview At present, the fluidized bed has been widely used in coal gasification, boiling boilers, industrial waste heat recovery, mobile particle furnaces and chemical reactors and other equipment. A common requirement for improving the serviceability and efficiency of these devices is to keep the fluidized bed fluidized. Despite the fluidized bed fluid state is also difficult to accurately define. However, in general, a good fluidization state should be uniform air flow, the bed has a good heat transfer