FLOW-DOWN FILM TYPE EVAPORATION APPARATUS

PURPOSE:To effectively suppress the generation of mist without lowering evaporation capacity, by gradually enlarging the vertical opening end parts of the gaps between the heating elements of a flow-down film type evaporation apparatus from above to below. CONSTITUTION:A flow-down film type evaporation apparatus has a heater passage and is equipped with a large number of hollow flat plate shaped heating elements 2 provided vertically in parallel at predetermined intervals and a liquid to be treated is evaporated while flowed down along the outer surface of each heating element 2. A plural number of flow amount adjusting plates 4 are respectively provided to the end parts of the heating elements 2 in the width direction thereof. Each flow adjusting plate 4 has the same length as each heating element and comprises a vertically long plate shaped body of which the width is gradually narrowed from above to below. In addition, said plate 4 is contacted with the end part of each heating element 2 at the central part in the width direction thereof and almost contacted with adjacent plates 4 at the upper end part thereof to each other.