Multi-Component Thermally Coupled Distillation's Energy Saving Design And Optimiztion

Distillation is the most widely used separation technology, and the largest energy consumption user in process industry. It produces great influence on production capacity, energy consumption, environment protection etc. But the conventional distillation column and the distillation sequence has been not suit for the current trend of process integrated and equipment integrated. To break through the conventional distillation arrangement, the design of energy saving complex distillation column and sequence become important and challenge task.Compared with the conventional distillation, the use of complex distillation can lead to substantial saving in energy consumption and capital cost. Complex distillation columns are also suitable for retrofit design, since they can often be implemented with only small modifications to existing columns. Among all the possible new methods of multi-components distillation process, thermally coupled distillation has good prospects in the saving of energy and capital costs.In this work, we analysis the minimum energy consumption of multiple components thermally coupled distillation; and focus on the design of multi-components using the use of detailed column models, the model used can both describe the conventional and thermally coupled distillation, and allow for the comparison among the different alternative arrangements; taking the energy saving as the optimal goal, we also carry global optimization for multi-components thermally coupled distillation using two interconnecting flows as search variables for...