A conventional falling film evaporator is suitable for non-fouling applications where tube coating is not a problem. A vertical shell and tube heat exchanger is mounted directly above an integral vapor sepA conventional falling film evaporator is suitable for non-fouling applications where tube coating is not a problem. A vertical shell and tube heat exchanger is mounted directly above an integral vapor sep
arator.Evaporator liquid is circulated through the tubes by a pump beneath the vapor separator. The heat source is on the shell side of the heat exchanger.