| 摘要 |
<p>A multistage vacuum distilling process for solution separation (e.g. for desalinating sea water) comprising providing a tower-like multistage vacuum distilling system, performing a constant temperature distilling process, transferring solutions, recycling a hot circulating solution to separate said solution and recover heat therefrom for reuse, setting a vacuum distilling temperature for each stage of the multistage vacuum distilling system according to the temperature gradient of the hot circulating solution, so that solution separation is achieved by multi-stage vacuum distillation wherein both the vacuum distilling temperature and a saturated vapour pressure corresponding thereto decrease from the upper to the lower stages of the multi-stage vacuum distilling system.</p> |
