Desalination method

Patent metadata

Field	Value
Publication number	US-9975785-B2
Application number	US-201514746879-A
Country	US
Kind code	B2
Filing date	Jun 23, 2015
Priority date	Mar 19, 2013
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A desalination method includes: introducing a liquid to a reservoir layer to place the liquid above a water-repellent particle layer; heating and evaporating the liquid placed above the water-repellent particle layer to generate water vapor and deposit impurities on the sheet; liquefying the water vapor by a liquefying layer to obtain fresh water; and removing the sheet on which the impurities have been deposited from a desalination apparatus.

First claim

The invention claimed is:

1. A desalination method for obtaining fresh water from a liquid using a desalination apparatus that obtains fresh water from a liquid in which impurities are dissolved, the desalination apparatus including:
a tank for storing a liquid in a reservoir layer;
a lid on an opening of the tank;
a water-repellent particle layer that is located at a bottom portion of the tank, the water repellent particle layer including a plurality of water-repellent particles that allow passage of water vapor generated by evaporation of the liquid stored in the reservoir layer, the reservoir layer being a space for storing the liquid;
a plurality of particles forming a liquefying layer that is located below the water-repellent particle layer, the liquefying layer being capable of liquefying the water vapor that has passed through the water-repellent particle layer to obtain the fresh water; and
a sheet that is disposed in a surface portion of the water-repellent particle layer, and has water permeability; the desalination method comprising:
introducing the liquid to the reservoir layer to place the liquid above the water-repellent particle layer;
heating and evaporating the liquid placed above the water-repellent particle layer to generate water vapor and deposit the impurities on the sheet;
liquefying the water vapor by the liquefying layer to obtain the fresh water;
and
removing the sheet on which the impurities have been deposited from the desalination apparatus.

2. The desalination method according to claim 1 ,
wherein, in the removing of the sheet from the desalination apparatus, the sheet and the impurities that have been deposited below the sheet are removed.

3. The desalination method according to claim 1 ,
wherein, in the removing of the sheet from the desalination apparatus, the sheet, the plurality of water-repellent particles included in the water-repellent particle layer and located above the sheet, and the impurities that have been deposited on the water-repellent particle layer are removed.

4. A desalination method for obtaining fresh water from a liquid using a desalination apparatus that obtains fresh water from a liquid in which impurities are dissolved, the desalination apparatus including:
a tank for storing a liquid in a reservoir layer;
a lid on an opening of the tank;
a water-repellent particle layer that is located at a bottom portion of the tank, the water repellent particle layer including a plurality of water-repellent particles that allow passage of water vapor generated by evaporation of the liquid stored in the reservoir layer, the reservoir layer being a space for storing the liquid;
a sheet that is disposed below the water-repellent particle layer, and has water permeability;
a lower water-repellent particle layer that is located below the sheet, the lower water repellent particle layer including a plurality of water-repellent particles that allow the passage of the water vapor generated by the evaporation of the liquid stored in the reservoir layer; and
a plurality of particles forming a liquefying layer that is located below the lower water-repellent particle layer, the liquefying layer being capable of liquefying the water vapor that has passed through the water-repellent particle layer to obtain the fresh water, the desalination method comprising:
introducing the liquid to the reservoir layer to place the liquid above the water-repellent particle layer;
heating and evaporating the liquid placed above the water-repellent particle layer to generate water vapor and deposit the impurities on the sheet;
liquefying the water vapor by the liquefying layer to obtain the fresh water;
and
removing the sheet on which the impurities have been deposited from the desalination apparatus.

5. The desalination method according to claim 4 ,
wherein, in the removing of the sheet from the desalination apparatus, the sheet and the impurities that have been deposited below the sheet are removed.

6. The desalination method according to claim 4 ,
wherein, in the removing of the sheet from the desalination apparatus, the sheet, the plurality of water-repellent particles included in the water-repellent particle layer and located above the sheet, and the impurities that have been deposited on the water-repellent particle layer are removed.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Taomoto Akira
• Tomiyama Morio
• Gyoten Hisaaki
• Mino Norihisa
• Ono Atsushi
• John Stephen William

Classifications

• C02F1/043 Primary

  Details · CPC title

• Y02A20/128

  Cross-Sectional Technologies · mapped topic

• C02F1/042

  Prevention of deposits · CPC title

• C02F2103/08

  Seawater, e.g. for desalination · CPC title

• B01D1/00

  Evaporating ({evaporation in general, e.g. of liquids for gas phase reactions B01B1/005} ; removal of incrustation B08B; preparation of starch C08B30/00; sugar industry C13; prevention of incrustation C23F; drying solid materials or objects by evaporating liquids therefrom F26) · CPC title