Flow-through fluid purification device

Patent metadata

Field	Value
Publication number	US-11565949-B2
Application number	US-201816485833-A
Country	US
Kind code	B2
Filing date	Feb 20, 2018
Priority date	Feb 23, 2017
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A flow through fluid purification device ( 1 ) comprising a container ( 5 ) arranged such that fluid can flow through a volume ( 8 ) of the container ( 5 ) from an inlet ( 3 ) to an outlet ( 7 ), and an inner cylinder ( 10 a ) inserted or insertable into the volume ( 8 ) of the container ( 5 ) and defining an interface wall ( 11 ) permeable for radiation with a wavelength in the UV-range, preferably between 150 nm and 200 nm, wherein the container ( 5 ) includes plurality of axially arranged cylinder parts ( 5 b, 5 c, 5 d, 5 e ) connected to each other by welding to form an outer cylinder assembly ( 5 a ).

First claim

The invention claimed is:

1. A flow through fluid purification device comprising:
a container arranged such that fluid can flow through a volume of the container from an inlet to an outlet;
a radiation source for emitting radiation with a wavelength in the UV-range; and
an inner cylinder inserted or insertable into the volume of the container and defining an interface wall permeable for radiation with a wavelength in the UV-range from said radiation source,
wherein the container includes a plurality of axially arranged cylinder parts connected to each other by welding to form an outer cylinder assembly, wherein at least some of the cylinder parts include a baffle plate protruding radially inward from an outer cylindrical wall, and wherein the cylinder parts with the baffle plate are substantially cup-shaped with the baffle plate forming an integral bottom thereof and including a central opening allowing the inner cylinder to be inserted through axially aligned central openings of the cylinder parts.

2. The device according to claim 1 , wherein the device has one end cap engaged with an open axial end of the outer cylinder assembly to fluid tightly close the volume of the container at the end where the end cap is arranged and to hold the inner cylinder in position in the outer cylinder assembly.

3. The device according to claim 1 , wherein the container has first and second ends, the outer cylinder assembly has two open axial ends, and the device has two end caps, each one engaged with one of the two open axial ends of the outer cylinder assembly to fluid tightly close the volume of the container at the first and second ends, wherein at least one of the two end caps is arranged to hold the inner cylinder in position in the outer cylinder assembly.

4. The device according to claim 2 , wherein the cylinder parts of the outer cylinder assembly include a locking cylinder part at one axial end or at both axial ends, wherein the locking cylinder part at one axial end or locking cylinder parts at both axial ends are arranged to releasably engage with the end cap or end caps.

5. The device according to claim 4 , wherein the releasable engagement is a snap-connection.

6. The device according to claim 5 , wherein the snap-connection includes plural locking protrusions at one of the locking cylinder part and the end cap and mating locking openings at the other one of the locking cylinder part and the end cap.

7. The device according to claim 1 , wherein the central opening in the bottom of the cylinder parts is formed to conform to the outer cross-section of the inner cylinder leaving a gap (G) between the outer wall of the inner cylinder and the baffle plate, wherein the gap (G) is the shortest distance between the interface wall and the baffle plate and is equal to or smaller than 2.0 mm.

8. The device according to claim 7 , wherein the device has at least one end cap, and an O-ring is provided between the at least one end cap and a locking cylinder part including the baffle plate so as to fluid-tightly close the gap (G) between the baffle and the inner cylinder.

9. The device according to claim 7 , wherein the gap (G) is uniform.

10. The device according to claim 1 , wherein an inter-baffle distance (D) in the flow direction along the interface wall is in the range from 4 to 30 mm.

11. The device according to claim 1 , wherein the outer cylinder assembly includes from 2 to 20 cylinder parts including the baffle plate.

12. The device according to claim 1 , wherein the cylinder parts forming the outer cylinder assembly are formed from metal, and are respectively formed by deforming a stamped sheet material.

13. The device according to claim 1 , wherein the interface wall of the inner cylinder is formed from or includes quartz glass.

14. The device according to claim 1 , wherein the radiation source is located in the inner cylinder so as to be separated from the fluid in the volume of the container by the interface wall.

15. The device according to claim 14 , wherein the radiation source emits radiation with a wavelength between 150 nm and 200 nm.

16. The device according to claim 14 , wherein the radiation source is an excimer lamp configured to emit radiation with a wavelength of 172 nm+8 nm.

Assignees

• Merck Patent Gmbh

Inventors

• Roitel Pascal
• Octave Jonathan

Classifications

• C02F2201/007

  Modular design · CPC title

• B01J19/123

  Ultraviolet light · CPC title

• C02F2103/04

  for obtaining ultra-pure water · CPC title

• C02F2301/024

  Turbulent · CPC title

• C02F1/325 Primary

  Irradiation devices or lamp constructions · CPC title