| 摘要 |
A distillation apparatus intended for distilling liquid, primarily water, comprising a distillation unit which includes a porous, hydrophobic membrane (2) which is pervious to steam, or vapour, but impervious to liquid, and a condensation surface (3) located at a distance from the membrane, such as to present an air gap (4) between the membrane and the condensation surface, the distillation apparatus further comprising units for conducting the liquid (20) to be distilled on the membrane surface remote from the air gap (4), and a unit for conducting a liquid (22) which is colder than the first mentioned liquid (20) on the side of the condensation surface (3) remote from the air gap (4). According to the invention the distance (L) between the membrane (2) and the condensation surface (3) lies in the range of about 0.2 mm - about 1 mm, and the thickness (b &cir& _) of the membrane (2) is less than about 0.5 mm. |
