SOLVENT SEPARATION METHOD AND SOLVENT SEPARATION APPARATUS

• US 20170341085A1
• Filed: 03/21/2017
• Published: 11/30/2017
• Est. Priority Date: 05/30/2016
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: NAGAI, KOICHI, MINAMIO, MASANORI, KANDA, TOSHIRO, KAWATA, MASAHIRO, TAKANO, YASUYUKI
• Granted Patent: US 10,478,828 B2
• Time in Patent Office: Days
• CPC Class Codes: B01D 2257/704 Solvents not covered by groups B01D2257/702 - B01D2257/7027
• CPC Class Codes: B01D 2258/0216 from CVD treatment or semi-conductor manufacturing
• CPC Class Codes: B01D 53/002 by condensation
• CPC Class Codes: B01D 53/323 by electrostatic effects or by high-voltage electric fields
• CPC Class Codes: B03C 2201/10 Ionising electrode with two or more serrated ends or sides
• CPC Class Codes: B03C 3/01 Pretreatment of the gases prior to electrostatic precipitation
• CPC Class Codes: B03C 3/014 Addition of water; Heat exchange, e.g. by condensation
• CPC Class Codes: B03C 3/017 Combinations of electrostatic separation with other processes, not otherwise provided for
• CPC Class Codes: B03C 3/02 Plant or installations having external electricity supply
• CPC Class Codes: B03C 3/08 characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
• CPC Class Codes: B03C 3/366 located in the filter, e.g. special shape of the electrodes
• CPC Class Codes: B03C 3/368 by other than static mechanical means, e.g. internal ventilator or recycler
• CPC Class Codes: B03C 3/38 Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
• CPC Class Codes: B03C 3/41 Ionising-electrodes
• CPC Class Codes: B03C 3/47 flat, e.g. plates, discs, gratings
• CPC Class Codes: F28B 1/06 using air or other gas as the cooling medium
• CPC Class Codes: F28D 21/0014 the heat being recuperated from waste air or from vapors for air conditioning F24F12/001
• CPC Class Codes: F28F 2265/24 for electrical insulation
• CPC Class Codes: F28F 3/04 the means being integral with the element

Abstract

Provided is a solvent separation method and a solvent separation apparatus that make it possible to efficiently retrieve the thermal energy possessed by an exhaust atmosphere released in a solvent-removal step to suppress reductions in a temperature of the exhaust atmosphere. In the solvent separation method and the solvent separation apparatus, a vaporized solvent is removed from a gas while heat-exchange between the gas within a condensation part and the gas within a dust-collection part is conducted by using a heat exchange part that is placed between the condensation part that introduces the gas into a first direction and the dust-collection part that introduce the gas into a second direction opposite to the first direction the gas discharged from a downstream side of the condensation part.

Claims

1. A solvent separation method, comprising:

(i) introducing a gas including a vaporized solvent into a condensation part in a first direction;

(ii) introducing the gas discharged from a downstream of the condensation part into a dust-collection part in a second direction opposite to the first direction; and

(iii) removing the solvent from the gas through steps (i) and (ii) while conducting heat exchange between the gas within condensation part and the gas within the dust-collection part by using a heat-exchange part that is placed between the condensation part and the dust-collection part.

2. The solvent separation method according to claim 1, wherein, in the condensation part, an electric field is applied to the gas by using an electrode that simultaneously serves as the heat-exchange part, to condense the vaporized solvent.

3. The solvent separation, method according to claim 1, wherein, in the dust-collection, part, an electric field is applied to the gas by using an electrode that simultaneously serves as the heat-exchange part, to separate the vaporised solvent.

4. The solvent separation method according to claim 2, wherein, in the dust-collection part, an electric field is applied to the gas by using an electrode that simultaneously serves as the heat-exchange part, to separate the vaporized solvent.

5. A solvent separation apparatus, comprising:

a condensation part that a gas including a vaporized solvent is introduced into in a first direction, and in which an electric field is applied to the gas to condense the vaporized solvent, and the gas is discharged therefrom to a downstream side of said condensation part;

a dust-collection part that the gas discharged from the downstream side of the condensation part is introduced into in a second direction opposite to the first direction, and in which an electric field is applied to the gas to separate the vaporized solvent; and

a heat-exchange part that is placed between the condensation part and the dust-collection part, and that provides heat exchange between the gas within the condensation part and the gas within the dust-collection part.

6. The solvent separation apparatus according to claim 5, wherein the condensation part has a condensation region that serves as a space into which the gas is introduced, the dust-collection part has a dust-collection region that serves as a space into which the gas discharged from the condensation part is introduced, the condensation region and the dust-collection region are adjacent, to each other, and the heat-exchange part is located between the condensation region and the duct-collection region.

7. The solvent separation apparatus according to claim 6, wherein the condensation part and the dust-collection part are included in an electric-field unit, and the electric-field unit further includes a casing that configures the condensation region and the dust-collection region, and the heat-exchange part that separates the condensation region and the dust-collection region.

8. The solvent separation apparatus according to claim 6, wherein the condensation part has a first electrode surface that is exposed to the condensation region and from which the electric field is applied to the gas within the condensation region, the dust-collection part has a second electrode surface that is exposed to the dust-collection region and from which the electric field is applied to the gas within the dust-collection region, and the heat-exchange part includes an electrode having the first electrode surface and the second electrode surface.

9. The solvent separation apparatus according to claim 7, wherein the condensation part has a first electrode surface that is exposed to the condensation region and from which the electric field is applied to the gas within the condensation region, the dust-collection part has a second electrode surface that is exposed to the dust-collection region and from which the electric field is applied to the gas within the dust-collection region, and the heat-exchange part includes an electrode having the first electrode surface and the second electrode surface.

10. The solvent separation apparatus according to claim 8, wherein the electrode has a first surf ace and a second surface opposite to the first surface, the first surface configures the first electrode surface, and the second surface configures the second electrode surface.

11. The solvent separation apparatus according to claim 9, wherein the electrode has a first surface and a second surface opposite to the first surface, the first surface configures the first electrode surface, and the second surface configures the second electrode surface.

12. The solvent separation apparatus according to claim 8, wherein a discharging electrode, and a plurality of first projections that serve as a first heatsink are provided on the first electrode surface, and a discharging electrode, and a plurality of second projections that serve as a second heatsink are provided on the second electrode surface.

13. The solvent separation apparatus according to claim 9, wherein a discharging electrode, and a plurality of first projections that serve as a first heatsink are provided on the first electrode surface, and a discharging electrode, and a plurality of second projections that serve as a second heatsink are provided on the second electrode surface.

14. The solvent separation apparatus according to claim 10, wherein a discharging electrode, and a plurality of first projections that serve as a first heatsink are provided on the first electrode surface, and a discharging electrode, and a plurality of second projections that serve as a second heatsink are provided on the second :

electrode surface.

15. The solvent separation apparatus according to claim 11, wherein a discharging electrode, and a plurality of first projections that serve as a first heatsink are provided on the first electrode surface, and a discharging electrode, and a plurality of second projections that serve as a second heatsink are provided on the second electrode surface.

16. The solvent separation apparatus according to claim 5, further comprising a blower that sucks the gas from the condensation part, that changes a direction of flow of the gas, and that delivers the gas to the dust-collection part.

17. The solvent separation apparatus according to claim 16, wherein the blower has a collection surface that cools the vaporized solvent to devolatilize the same, thereby separating the same from the gas.