The two fluids are kept essentially isolated from contact with each other in the condensing reboiler, and {HEAD ~ the high purity water} is pumped back to the high pressure boiler in {TAIL ~ a closed loop system} 
The two fluids are kept essentially isolated from contact with each other in the condensing reboiler , and { HEAD ~ the high purity water } is pumped back to the high pressure boiler in { TAIL ~ a closed loop system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL