| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a solvent distillation system increased in treatment quantity per hr and having good energy efficiency. <P>SOLUTION: The solvent distillation system is equipped with a heat exchanger and has a preheating part for preheating the solvent to be distilled containing impurities charged in a distillation part by the heat exchanger and liquefying the vapor of the solvent from the distillation part to recover the solvent, the distilling part for heating the solvent to be distilled containing impurities preheated in the preheating part to concentrate the same and sending the concentrated solvent to a concentrated heavy component distillation part while sending the vapor of the solvent above the surface of the solvent to the heat exchanger of the preheating part, and the concentrated heavy component distillation part for further heating the solvent to be distilled containing impurities concentrated in the distillation part to concentrate the same and sending out the vapor of the solvent to the surface of the solvent of the distillation part or the preheating part. <P>COPYRIGHT: (C)2004,JPO |
