The system shown was designed to achieve pressure of 300mbar abs, utilising Dichloromethane, (DCM), as the liquid ring medium.

DCM has an atmospheric boiling temperature of 42C, and to obtain the design pressure, the coolant on the ring seal liquid cooler was a methanol/water mix brine @ -25C.

The separator vessel was split into two sections, one section was the recirculation loop, with the large section acting as a receiver for DCM.

The receiver section held around eight batches of recovered solvent.


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