| 摘要 |
<p>A falling film concentrator composed of alternately stacked feedstock plates (10) and steam plates (20) for concentrating a highly heat-sensitive liquid feedstock at a high concentration ratio with heating steam without impairing its flavor and quality, in which the width of a heating flow passage (18) is gradually reduced from an inlet (12) for the feedstock toward an outlet (13) for the concentrated liquid. Thus, no scorch occurs even when the feedstock is reduced in quantity after the water contained therein has been evaporated and separated therefrom. For preventing the speed of the concentrated liquid flowing toward the outlet (13) from being increased by steam generated from the feedstock, the plate-to-plate distance between the heating flow passages (18) is gradually increased from the feedstock inlet (12) toward the concentrated liquid outlet (13).</p> |
