Bottom Vapor Entry

Bottom vapor entry is used primarily for condensate segregation with countercurrent flow of condensing steam and outgoing condensates. In this design, more than 85% of the incoming methanol content and associated COD can be concentrated in a less than 10% stream of the entering vapors. This means smaller flows of foul condensate to the steam stripper and cleaner contaminated condensates.

Additional benefits of bottom vapor entry include the following:

• Elements can be bottom supported from the steam inlet plenum.
• Eliminates large steam headers and vapor ducts at the top of the evaporator.
• Reduces size of body diameters.
• Creates better entrainment separation.