Kinds of Distillation Complexes with Thermal Coupling Flows

Kinds of Distillation Complexes with Thermal Coupling Flows 

Three kinds of distillation complexes with thermal coupling flows (with branching of liquid and/or vapor flows) - columns with side stripping, columns with side rectifiers and complexes with full thermal coupling flows, called Petlyuk column -are used in industry at present. 

For three-component mixtures, these kinds of complexes can be easily obtained from three splits of three-component mixture in the first in motion column of the 

To transform each separation sequence into distillation complex, it is sufficient to exclude one reboUer, one condenser, or both and to replace them by hquid or vapor flows from the other column (Fig. 6.12). This figure for the sequence with preferable separation of flows in the first column shows some additional modifications (Fig. 6.12e,f). 

Columns with side stripping (Fig. 6.12b) are used at refinery beginning with the first decades of the twentieth century (see Watkins, 1979). 

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