粉煤灰微珠作为绝热、隔音与耐火材料在工业生产中有着广泛的应用。实际应用中对微珠的干燥程度有严格的要求,一般的干燥方法难于达到预期要求,而采用流态化技术能够较好地解决这一问题。目前,对于流化干燥过程的研究多为实验研究,理论分析尚少见发表。本文应用非平衡热力学理论,针对外置双室交叉流流化床中微珠干燥的传热、 Fly ash beads as a heat insulation, sound insulation and refractory materials in industrial production has a wide range of applications. The practical application of the beads on the degree of drying has strict requirements, the general drying method is difficult to achieve the desired requirements, and the use of fluidized technology can better solve this problem. At present, most of the studies on the fluidized drying process are experimental studies, but theoretical analysis is still rare. In this paper, the theory of non-equilibrium thermodynamics is applied to the heat transfer of microbeads in an external double-chamber fluidized bed.