| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a vaporizing concentration apparatus and a vaporizing concentration method usable as a heat source for heating and vaporizing a solution by recovering the heat of vapor due to evaporation of the solution even when the solution has a high boiling point. <P>SOLUTION: In a vaporizer 1 of pressure-reduced state, the solution in the liquid storage chamber 3 in a lower part is pumped up with a circulation pump 7, and sprayed onto heat transfer tubes 6 for heating from a sprayer 9 at an upper part. The vapor generated by the evaporation of the solution is compressed to a compression temperature difference higher than the boiling point rise of the solution at the final concentration, by at least two-stage vapor ejectors 21, 22 of a preceding stage first vapor ejector 21 and a latter stage vapor ejector 22, to supply the vapor into the heat transfer tubes 6. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
