Integrated ultrafiltration membrane and ion-exchange filtration system

Patent metadata

Field	Value
Publication number	US-10688441-B2
Application number	US-201715491623-A
Country	US
Kind code	B2
Filing date	Apr 19, 2017
Priority date	Apr 19, 2017
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

An ion-exchange and ultrafiltration filter system having an exterior housing having an inlet and an outlet with an ultrafiltration membrane provided within the housing along a central axis about a central portion of the housing with an ion-exchange membrane provided within the housing between the ultrafiltration membrane and the housing. The ion-exchange and ultrafiltration filter system being capable of being configured so as to provide two-step filtration in a plurality of modes, either ion-exchange to ultrafiltration, or ultrafiltration to ion-exchange.

First claim

What is claimed:

1. An ion-exchange and ultrafiltration filter system, the system comprising:
a housing having an inlet and a clean outlet;
an ultrafiltration membrane provided within the housing, the ultrafiltration membrane being provided about a central portion of the housing; and
an ion-exchange membrane provided within the housing between the ultrafiltration membrane and the housing;
wherein the ion-exchange membrane includes a plurality of layers;
wherein each layer is sealed from any adjacent layers,
wherein a flow is configured to pass through the ion-exchange membrane in alternating axial directions.

2. The ion-exchange and ultrafiltration filter system of claim 1 , further arranged such that a contaminated stream being directed through the inlet passes first through the ultrafiltration membrane at a first end, at least of portion of which is then directed through the ion-exchange membrane before exiting the clean outlet.

3. The ion-exchange and ultrafiltration filter system of claim 1 , wherein the ion-exchange membrane includes an internal lattice structure and an ion-exchange media.

4. An ion-exchange and ultrafiltration filter system, the system comprising:
a housing having an inlet and a clean outlet;
an ultrafiltration membrane provided within the housing, the ultrafiltration membrane being provided about a central portion of the housing; and
an ion-exchange membrane provided within the housing between the ultrafiltration membrane and the housing;
wherein the ultrafiltration membrane includes an ultrafiltration housing, the ultrafiltration housing containing a plurality of tubular ultrafiltration media extending axially along the length of the ultrafiltration housing, an axis of the ultrafiltration housing being parallel with an axis of the housing of the ion-exchange and ultrafiltration filter system;
the ion-exchange and ultrafiltration filter system further comprising a cap having a plurality of guided channels, the cap being provided within the external housing, and the plurality of guided channels being configured to direct fluid exiting the ultrafiltration membrane into an end portion of the ion-exchange membrane.

5. The ion-exchange and ultrafiltration filter system of claim 4 , wherein a first end of each of the tubular ultrafiltration media is open, and wherein any space between each of the ultrafiltration media is blocked at the first end, and wherein an interior second end of each of the tubular ultrafiltration media is blocked, and wherein the space between each of the ultrafiltration media at the second end includes at least one aperture, so as to force any fluid passing from the first end to the second end to enter the tubular ultrafiltration media and pass through a sidewall portion of at least one tubular ultrafiltration structure, and exit the second end.

6. The ion-exchange and ultrafiltration filter system of claim 4 , wherein the cap is sealed to an end portion of the ultrafiltration membrane and an end portion of the ion-exchange membrane.

7. An ion-exchange and ultrafiltration filter system, the system comprising:
a housing having
an inlet provided about an axial end of the housing and
an outlet provided about a sidewall of the housing;

an ultrafiltration membrane, comprising
an ultrafiltration housing and
a plurality of tubular ultrafiltration media extending axially along the length of the ultrafiltration housing,
an axis of the ultrafiltration housing being parallel with an axis of the housing,
the ultrafiltration housing being provided about a central portion of the housing; and

an ion-exchange membrane provided within the housing between the ultrafiltration membrane and the housing;
wherein the ion-exchange membrane includes a plurality of layers,
wherein each layer is sealed from any adjacent layers,
wherein a flow passing therethrough is configured to pass through the ion-exchange membrane layers in alternating axial directions.

8. The ion-exchange and ultrafiltration filter system of claim 7 , wherein
the ion-exchange membrane includes an internal lattice structure and an ion-exchange media.

9. The ion-exchange and ultrafiltration filter system of claim 7 , wherein
a first end of each of the tubular ultrafiltration media is open, and
wherein the space between each of the ultrafiltration media at the first end is blocked, and
wherein a second end of each of the tubular ultrafiltration media is blocked, and
wherein the space between each of the ultrafiltration media at the second end includes at least one aperture, so as to force any fluid passing from the first end to the second end to enter the tubular ultrafiltration media and pass through a sidewall portion of at least one tubular ultrafiltration structure, and exit the second end.

10. An ion-exchange and ultrafiltration filter system, the system comprising:
a housing having
an inlet provided about an axial end of the housing and
an outlet provided about a sidewall of the housing;

an ultrafiltration membrane, comprising
an ultrafiltration housing and
a plurality of tubular ultrafiltration media extending axially along the length of the ultrafiltration housing,
an axis of the ultrafiltration housing being parallel with an axis of the housing,
the ultrafiltration housing being provided about a central portion of the housing; and

an ion-exchange membrane provided within the housing between the ultrafiltration membrane and the housing;
further comprising a cap having a plurality of guided channels, the cap being provided within the external housing, and the plurality of guided channels being configured to direct fluid exiting the ion-exchange membrane into the ultrafiltration membrane.

Assignees

• Mann & Hummel Gmbh

Inventors

• Kariveti Sreenath

Classifications

• B01D61/145 Primary

  Ultrafiltration · CPC title

• B01D63/069

  comprising a bundle of tubular membranes · CPC title

• B01D2313/04

  Specific sealing means · CPC title

• B01D2315/08

  Fully permeating type; Dead-end filtration · CPC title

• B01D2319/022

  Reject series · CPC title