Atmospheric-vacuum distillation of oil, including unit of electric desalting of oil – cdu-vdu

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”.

 

Process flow diagram of a three column unit for primary crude oil processing VDU

 

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.