| 摘要 |
<p>A new vacuum freezing separation process entitled ''Vacuum Freezing Ambient Pressure Melting (VFAPM) Process'' and a new apparatus entitled ''Sub-Triple Point Vapor Processing Unit'' for generating and liquefying a sub-triple point vapor have been introduced. The process is useful in desalination, concentration of industrial solutions, water reuse and pollution abatement. The vapor processing unit can be used in vacuum freezing processes, distillative freezing processes, freeze-drying processes and other processes in which sub-triple point vapors are generated and are to be liquefied. The VFAPM Process is conducted in two processing zones, a vacuum processing zone and an ambient pressure processing zone. A vacuum freezing operation of generating a first vapor and a first condensed mass containing solvent crystals and a two-stage liquefaction of the first vapor are conducted in the vacuum processing zone; a crystal washing operation and a crystal melting operation are conducted in the ambient pressure processing zone.</p> |
