Separation membrane module and liquid treatment system including the same

Patent metadata

Field	Value
Publication number	US-12263448-B2
Application number	US-201917424776-A
Country	US
Kind code	B2
Filing date	Dec 4, 2019
Priority date	Jan 22, 2019
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

A separation membrane module 100 of the present invention includes: a container 10 ; a degassing membrane element 20 that is disposed inside the container 10 ; and a separation membrane element 60 that is disposed inside the container 10 , is located upstream or downstream of the degassing membrane element 20 in a flow direction of a liquid to be treated, and filters the liquid. The separation membrane element 60 is for example, an NF membrane element or an RO membrane element.

First claim

The invention claimed is:

1. A separation membrane module comprising:
a container;
a degassing membrane element that is disposed inside the container;
a separation membrane element that is disposed inside the container, is located upstream or downstream of the degassing membrane element in a flow direction of a liquid to be treated, and filters the liquid; and
a support disposed at a gap between the degassing membrane element and an outer wall of the container, the support having a through hole that allows the liquid to pass through the support,
wherein both of the degassing membrane element and the separation membrane element are contained in the container.

2. The separation membrane module according to claim 1 , wherein
the container includes a cylindrical container body, a first end plate attached to a first end portion of the container body, a second end plate attached to a second end portion of the container body,
at least one port is provided on the first end plate,
at least one port is provided on the second end plate, and
the at least one port provided on the first end plate or the at least one port provided on the second end plate includes a port for evacuating the degassing membrane element.

3. The separation membrane module according to claim 2 , wherein the number of the at least one port provided on the first end plate is different from the number of the at least one port provided on the second end plate.

4. The separation membrane module according to claim 1 , wherein
the container has a cylindrical container body, and
a port for communication between the inside of the container and the outside of the container is provided at each of a first end portion of the container and a second end portion of the container.

5. The separation membrane module according to claim 1 , wherein the container has a bilaterally asymmetric structure with respect to the flow direction of the liquid to be treated.

6. The separation membrane module according to claim 1 , wherein the separation membrane element is disposed upstream of the degassing membrane element in the flow direction of the liquid.

7. The separation membrane module according to claim 1 , wherein the separation membrane element is disposed downstream of the degassing membrane element in the flow direction of the liquid.

8. The separation membrane module according to claim 1 , wherein
the degassing membrane element has a shell and a plurality of hollow fiber membranes disposed inside the shell, and
the liquid is introduced into the shell to be brought into contact with the plurality of hollow fiber membranes and is then discharged out of the shell.

9. The separation membrane module according to claim 1 , wherein the separation membrane element is an NF membrane element or an RO membrane element.

10. The separation membrane module according to claim 1 , wherein
the degassing membrane element has a shell and a second tube that extends from an inside of the shell to an outside of the shell, and
a distributor is attached to an end portion of the second tube such that the liquid radially flows out of the second tube into an internal space of the container.

11. A liquid treatment system comprising:
a first separation membrane module that has at least one selected from an MF membrane and a UF membrane,
a second separation membrane module that is disposed downstream of the first separation membrane module in a direction of a liquid to be treated and treats a permeate liquid from the first separation membrane module, wherein
the second separation membrane module is the separation membrane module according to claim 1 .

Assignees

• Nitto Denko Corp

Inventors

• Kawashima Toshiyuki
• Ogawa Tomoya

Classifications

• B01D63/101

  Spiral winding · CPC title

• C02F1/444

  by ultrafiltration or microfiltration · CPC title

• C02F1/442

  by nanofiltration · CPC title

• C02F1/441

  by reverse osmosis · CPC title

• C02F1/44

  by dialysis, osmosis or reverse osmosis {(general membrane separation processes B01D61/00, membrane modules B01D63/00, electrodialysis C02F1/4693, combination of membrane modules and bioreactors C02F3/1268)} · CPC title