STREAM DOWN LIQUID FILM TYPE HEAT EXCHANGER PROVIDED WITH FILM FORMING COMPONENT

摘要

PURPOSE:To obtain a vertical multipipe stream-down liquid film type heat exchanger whose heat exchange efficiency has been improved, by forming a thin stream down film on an inner surface of a heat exchanger tube by leading a liquid on the inner surface of the heat exchanger tube by providing an inner insertion pipe on the top of the heat exchanger pipe. CONSTITUTION:A plate 50 constituting the bottom part of a shunt box is provided with a plurality of holes and a shunt pipe 52 is hung downward through the hole under a concentric state with a heat exchanger pipe 36. The bottom of each shunt pipe 52 is closed and a plurality of horizontal holes 56 positioning in a radial state is formed on the bottom of the same. A supply liquid in a partition chamber 30 is discharged through a pipe 36 in a lateral direction and brougt into contact with the inner surface of the heat exchanger pipe 36. When the liquid flows downward, it is diffused suddenly, a continuous circumferential layer or a film is formed along the inner surface of the heat exchanger pipe 36 and the maximum area for making heat exchange with a coolant of a trunk 12 side streaming down on the external surface of the heat exchanger pipe 36 can be obtained.