Title:
SOLVENT RECOVERY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/085432
Kind Code:
A1
Abstract:
Provided is a solvent recovery system that has a particularly high energy-saving effect when the concentration of a solvent included in a raw-material liquid is low. This solvent recovery system is configured to be provided with: (a) a reverse-osmosis membrane unit 10 that separates a raw-material liquid into a reverse-osmosis-membrane-concentrated liquid and water; and (b) auto-vapor-mechanical-compression-type distillation equipment (a first distillation mechanism part) 20 provided with a first distillation column 21 for distilling the reverse-osmosis-membrane-concentrated liquid, a first reboiler 22, a compressor 23 that conducts insulated compression on a first overhead vapor, which is overhead vapor from the first distillation column, and that serves as a heating source for the first reboiler, a reflux line 31 for causing some of condensed liquid of the compressed vapor to flow back to the first distillation column, and a return line 32 that returns the remainder of the condensed liquid to the reverse-osmosis membrane unit, the distillation equipment also being configured so that the concentration of solvent in first bottom liquid, which is bottom liquid from the first distillation column, is 35-45 mass%.
Inventors:
SHIGE YOICHI (JP)
SUZUKI KATSUYOSHI (JP)
SUZUKI KATSUYOSHI (JP)
Application Number:
PCT/JP2019/041705
Publication Date:
April 30, 2020
Filing Date:
October 24, 2019
Export Citation:
Assignee:
KIMURA KAKOKI CO LTD (JP)
International Classes:
B01D61/02; B01D3/00; B01D61/58; C02F1/44
Foreign References:
| JPH024401A | 1990-01-09 | |||
| JP2011162502A | 2011-08-25 | |||
| JP2002028637A | 2002-01-29 | |||
| JP2018154591A | 2018-10-04 | |||
| JPS634826A | 1988-01-09 | |||
| JP2016534112A | 2016-11-04 | |||
| JPS6316001A | 1988-01-23 | |||
| JPH04135627A | 1992-05-11 |
Attorney, Agent or Firm:
NISHIZAWA, Hitoshi et al. (JP)
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