PURPOSE: To prevent a fluid film from being partially cut at the end of a heating element and from accompanying a splash, by providing a flow rectifier to prevent evaporating steam from deviating to both sides of a plurality of heating elements of plate type when it is rising in a can body.
CONSTITUTION: When a circulating fluid (F) is dripped down in filmy state along heating elements 3 of plate type of each group 2 of heating elements, part of it is evaporated by steam heat which is flowing through the heating element 3 of plate type, turning into a steam 14. The evaporated steam 14 rises up in a can body. The steam evaporated from the lower part of the group 2 of heating elements is led to the outer side of the group 2 of heating elements, and that evaporated from the middle part of the group 2 of heating elements is led to the inside and the side direction of the group 2 of heating elements, while that evaporated from the upper part of the group 2 of heating elements is led to the outer side of the group 2 of heating elements by a flow rectifier plate 13, respectively. In such a manner deviation of flow of the steam can be prevented.
UEDA KIYOHISA
YANO MASAHITO
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