Process flow diagram of a three column unit for primary crude oil processing VDU (Vacuum Distillation Unit) using cross-flow packings developed by R&D Institute “PEGAZ”.
In this oil fractionation process there is implemented an energy saving technology in three cross-flow packing columns on the basis of the following three elements:
- organization of a two-level feed of crude oil flow, the lower of which has a higher temperature, which allows to achieve high selection of gasoline fraction with a low number of reflux in the cross-flow packing;
- cross-flow packings in rectification columns provide high efficiency of heat-mass exchange at the required fractionation definition with optimal heat removal of circulating reflux;
- optimal heat recovery of heat-carriers streams for oil heating due to efficient binding of heat exchangers.