# US 10,478,828 B2 · Solvent separation method and solvent separation apparatus

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- Number: US 10,478,828 B2
- Document ID: US10478828B2
- Status: Granted
- Kind: B2
- Application number: 15/464,956
- Filed: 2017-03-21
- Published: 2017-11-30
- Granted: 2019-11-19
- Earliest claimed: 2016-05-30
- Assignees: Panasonic Corporation
- Applicants: Panasonic Corporation
- Inventors: Koichi Nagai; Masanori Minamio; Toshiro Kanda; Masahiro Kawata; Yasuyuki Takano
- Web page: https://patentgrep.com/patent/US10478828B2

## CPC

- B03C 3/01: Pretreatment of the gases prior to electrostatic precipitation
- B01D 53/002: {by condensation}
- B01D 53/323: {by electrostatic effects or by high-voltage electric fields}
- B03C 3/014: Addition of water; Heat exchange, e.g. by condensation
- B03C 3/017: Combinations of electrostatic separation with other processes, not otherwise provided for
- B03C 3/02: Plant or installations having external electricity supply
- B03C 3/08: characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
- B03C 3/366: {located in the filter, e.g. special shape of the electrodes}
- B03C 3/368: {by other than static mechanical means, e.g. internal ventilator or recycler}
- B03C 3/38: Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
- B03C 3/41: Ionising-electrodes
- B03C 3/47: flat, e.g. plates, discs, gratings
- F28B 1/06: using air or other gas as the cooling medium
- F28D 21/0014: {the heat being recuperated from waste air or from vapors (for air conditioning F24F12/001)}
- F28F 3/04: the means being integral with the element
- B01D 2257/704: Solvents not covered by groups B01D2257/702 - B01D2257/7027
- B01D 2258/0216: from CVD treatment or semi-conductor manufacturing
- B03C 2201/10: Ionising electrode with two or more serrated ends or sides
- F28F 2265/24: for electrical insulation
- B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- F28B: STEAM OR VAPOUR CONDENSERS (condensation of vapours B01D5/00; steam engine plants having condensers F01K; liquefaction of gases F25J; details of heat-exchange and heat-transfer arrangements of general application F28F)
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## 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

### Claim 1

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.

### Claim 2 (depends on 1)

The solvent separation apparatus according to claim 1, 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.

### Claim 3 (depends on 2)

The solvent separation apparatus according to claim 2, 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.

### Claim 4 (depends on 2)

The solvent separation apparatus according to claim 2, 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.

### Claim 5 (depends on 3)

The solvent separation apparatus according to claim 3, 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.

### Claim 6 (depends on 4)

The solvent separation apparatus according to claim 4, 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.

### Claim 7 (depends on 5)

The solvent separation apparatus according to claim 5, 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.

### Claim 8 (depends on 1)

The solvent separation apparatus according to claim 1, 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.