Segmented Optimal Design Method for the Combined Drying System
组合式干燥系统的分段优化设计方法

A new design method-the segmented design method for drying system was put forward. The primary idea of this method is disassembling one task into several tasks, then designing them based on the different characteristics of each assignment. This method was studied by the optimal design of the drying process. The optimal design was aimed at the minimization of annual total cost, of which the drying process was expressed as a three-segment superstructure at most and two drying equipments could be chosen in each segment. The system models of each unit and process and the economic models were used.in this method. The result showed that it was b~tter to apply the two-segment method when the moisture of material was more than the critical moisture under the same condition, with the rotating-cylinder drier and the fluid-bed drier combined to drying; one-segment drying method with materials put into fluid-bed drier directly should be adopted when the moisture of material was less than the critical moisture under the same condition.