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 {TAIL ~ the high pressure boiler} in a closed loop system 
is pumped back to
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 { TAIL ~ the high pressure boiler } in 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 REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH