Study On Segmented Optimal Design Method For The Separation Process

The purpose of separation process synthesis is how to choose suitable separate method and to confirm the best separate sequence in terms of economic competence. Separation process synthesis, as a part of process synthesis, is studied with important meaning. But because of the complexity and multiformity of the separation process synthesis itself, the actual theory and method can only solve some simple problems relatively, which exist lots of difficulties and deficiencies in the research of the separation process synthesis. The work presented in this thesis aims at providing a new method of separation process synthesis based on analysis to separation process itself.1 , Putting forward a segmented design method for separation process: According to the different impetus of different phase in separation process, the method can disassemble one separation assignment into several sub-assignments with different sub-cases and set up a superstructure model including all types of feasible sub-cases. Optimal calculation with suitable algorithm is applied to the model to find the optimal technics configurations, aimed at economic competence.2, The drying process is studied by the method of segmented design. According to the different impetus of different phase in the drying process, the drying process is described as a superstructure model which applied optimal design to the number of segments and technics parameters of every segment with the purpose of the minimization of annual total cost. The result showed that it's better to apply the two-segment method when the moisture of material was more than the critical moisture on 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...