Multi-stage vacuum generation for refineries

The most common application of multi-steam ejectors is in the vacuum distillation column of an oil refinery.

multi-stage-vacuum-generation_refinery_downstream_refinery-02

A larger fraction  of crude oil  after the atmospheric  distillation is driven into the vacuum distillation unit which is one of the most productive and critical equipment in the refinery. 

The vacuum in the distillation column is kept by a multi-stage steam ejector unit which includes:  

  • Booster ejector (first ejector connected to the distillation tower)
  • Main condensers and deaeration unit, also with steam ejector in some cases
  • Liquid ring vacuum pump