long-tube vertical evaporator

long-tube vertical evaporator

[′lȯŋ ‚tüb ¦vərd·ə·kəl i′vap·ə‚rād·ər]
(chemical engineering)
A liquid evaporator in which the material is force-fed into the bottom of a bundle of long, vertical tubes; hot liquid on the outsides of the tubes transfers heat to the rising liquid feed, causing partial evaporation.