| 摘要 |
The structure comprises a substantially-closed hollow module (10) comprising two similarly-shaped imperforate chambers, a smaller inner chamber (1) and a larger outer chamber (4), respective walls of which are spaced from each other. The inner chamber has two opposed ends (11, 19), means (12) to withdraw solids from one end, means (6) to withdraw gas or vapor from the other end, means (7) to move gas or vapor from the inner chamber (1) to the outer chamber (4), means (15) to introduce a solids-containing liquid into the inner chamber and means (13) to spread the solids-containing liquid as a thin sheet of film over walls of the inner chamber. The outer chamber has two opposed ends (3, 20), means (3) to receive gas or vapor from the inner chamber, means (3, 8) to condense vapor, means (2, 2a) to discharge non-condensed gas or vapor, means (18) to discharge condensed vapor and, preferably, an externally insulated outer wall (22). The module itself is provided with conventional means (24) to maintain substantially constant temperature and pressure conditions within the inner chamber, conventional means (26) to vaporize liquid from the solids-containing liquid and conventional means (28) to maintain vaporized liquid in a substantially saturated state within the inner chamber. |
