HEAT EXCHANGER USED FOR SURFACE FLOW-DOWN TYPE CONCENTRATION, CONCENTRATOR USING HEAT EXCHANGER, SURFACE FLOW-DOWN TYPE CONCENTRATION METHOD AND SURFACE FLOW-DOWN TYPE CONCENTRATOR

摘要

PROBLEM TO BE SOLVED: To prevent a heat transfer member from being elongated and increased in size, release it from restriction in installing space through a compact formation of the device and realize a low cost by a method in which bumping phenomenon is avoided while operation is being carried out near a boiling point where high heat flow rate can be utilized, a high heat efficiency and a high concentration efficiency can be accepted.SOLUTION: This invention relates to a heat transfer body for performing a heat exchanging operation between undiluted solution within a vacuum container dropped in gravity at a flow passage formed with a plurality of grooves on an outer surface of a heat transfer body in a substantial vertical direction that are oppositely spaced apart in a horizontal direction and heat media flowing in the heat transfer body. The heat transfer body constitutes a group of heat transfer bodies in which a plurality of stages are spaced apart and arranged in a vertical direction, each of the upper end and the lower end of each of the heat transfer bodies is provided with an extremity end. A surface flow-down type concentrator using a heat exchanger is operated in such a way that bumping phenomenon is avoided while operation is being carried out near a boiling point and a high heat efficiency, a high concentration efficiency and small-sized formation of the device are pursued.