MVR stands for Mechanical Vapor Recompression and is an evaporator driven by mechanical energy or electricity. The process is actually an open heat pump process and therefor the drive energy demand is depends on delta T between condensing vapor and evaporating vapor. That is why MVR evaporator works with quite low energy demand as long as the boiling point rise is low.
The MVR evaporator can be located quite freely because no large steam or cooling water piping is needed. In black liquor service MVR is normally used as pre-evaporator.
- Excellent for pre-evaporation and capacity upgrade
- Minimizes the need for sweetening
- Short vapor ducts enhance the efficiency