Deionizing device

• US 10,836,657 B2
• Filed: 07/15/2019
• Issued: 11/17/2020
• Est. Priority Date: 11/21/2013
• Status: Active Grant

• Current Assignee: Amogreentech Co., Ltd.
• Original Assignee: Amogreentech Co., Ltd.
• Inventors: Seo, In Yong, Hwang, Jun Sik
• Primary Examiner(s): Jain, Salil
• Application Number:
  US16/511,572
• Publication Number:
  US 20190337824A1
• Time in Patent Office: 491 Days
• CPC Class Codes: B01D 61/48 having one or more compartments filled with ion-exchange material , e.g. electrodeionisation
• CPC Class Codes: B01D 63/10 Spiral-wound membrane modules
• CPC Class Codes: B01D 63/101 Spiral winding
• CPC Class Codes: C02F 1/46109 Electrodes
• CPC Class Codes: C02F 1/4695 electrodeionisation

Abstract

Provided is a deionization apparatus which includes: a porous electrode having fine pores; a non-pore ion exchange membrane that is formed in the porous electrode; a counter electrode that is spaced from the non-pore ion exchange membrane and faces the non-pore ion exchange membrane; and a spacer that is located between the porous electrode and the counter electrode, and that has a flow passage through which water to be treated passes.

Claims

1. A deionization apparatus comprising:

a porous electrode including a porous substrate, wherein the porous substrate is formed of a non-woven fabric, a first porous nanofiber web having first pores and laminated on one surface of the non-woven fabric and a second porous nanofiber web having second pores and laminated on the other surface of the non-woven fabric, and the first porous nanofiber web and the second porous nanofiber web is formed of electrospun and accumulated nanofibers, the nanofibers being made of a polymer material;

a non-pore ion exchange membrane formed on the second porous nanofiber web;

a conductive film formed on the first porous nanofiber web, the conductive film being made of a conductive material, wherein the conductive material is coated on inner surfaces of the first pores;

a counter electrode facing and spaced from the non-pore ion exchange membrane;

a spacer located between the non-pore ion exchange membrane and the counter electrode, and having a flow passage through which water to be treated passes; and

an insulating layer in contact with the counter electrode or the porous electrode,

wherein a thickness of the first porous nanofiber web and the second porous nanofiber web is thinner than that of the non-woven fabric, and

wherein the porous electrode, the non-pore ion exchange membrane, the spacer, the counter electrode, and the insulating layer are rolled into a spiral shape.

2. The deionization apparatus of claim 1, wherein the conductive film is formed by depositing the conductive material.

3. The deionization apparatus of claim 1, further comprising a coat layer coated on the conductive film.

4. The deionization apparatus of claim 1, wherein the counter electrode is a ground electrode.

5. The deionization apparatus of claim 1, wherein the counter electrode is a non-porous electrode.

6. The deionization apparatus of claim 1, wherein the spacer is a mesh or a nonwoven fabric.

7. The deionization apparatus of claim 1, wherein the polymer material includes a mixed polymer material of polyacrylonitrile (PAN) and polyvinylidene fluoride (PVDF), mixing ratio being in a range of 4:

1 to 1;

1 at a weight ratio.

8. The deionization apparatus of claim 1, wherein the non-pore ion exchange membrane is formed of an electrosprayed and accumulated ion exchange material.

9. The deionization apparatus of claim 1, wherein the first pores and the second pores have a diameter in a range of 1 nm to 100 μ

m, and the first porous nanofiber web and the second porous nanofiber web have a porosity in a range of 50% to 90%.