Flow-through fluid purification device and means for accommodating a radiation source

Patent metadata

Field	Value
Publication number	US-11286179-B2
Application number	US-201816485830-A
Country	US
Kind code	B2
Filing date	Feb 20, 2018
Priority date	Feb 23, 2017
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

A flow-through fluid purification device (1), which comprises a container (5) arranged such that fluid to be purified can flow-through a volume (8) of the container (5) from an inlet (3) to an outlet (7), a receptacle (10) for accommodating a radiation source in the form of a lamp (13), wherein the receptacle (10) has an interface wall (11) permeable for radiation with a wavelength in the UV-range, preferably between 150 nm and 200 nm, more preferably of 172±8 nm, and arranged to let radiation pass into the volume (8) of the container (5), a plurality of baffle plates (9) located in the volume (8) of the container (5) with an inter-baffle distance (D) in the flow direction from the inlet (3) to the outlet (7), wherein the baffle plates (9) are arranged to force the fluid flowing from the inlet (3) to the outlet (7) to flow substantially along the interface wall (11) and through gaps (G) between the interface wall (11) and the baffle plates (9) defining the shortest distance between the interface wall (11) and the baffle plates (9), and wherein the baffle plates (9) each have a surface on the upstream side in the flow direction which is perpendicular to the interface wall (11).

First claim

The invention claimed is:

1. A flow-through fluid purification device comprising:
a container arranged such that fluid to be purified can flow-through a volume of the container from an inlet to an outlet;
a receptacle for accommodating a radiation source in the form of a lamp, wherein the receptacle has an interface wall permeable for radiation with a wavelength in the UV-range, and arranged to let radiation pass into the volume of the container;
a plurality of baffle plates located in the volume of the container with an inter-baffle distance (D) in the flow direction from the inlet to the outlet,
wherein the baffle plates are arranged to force the fluid flowing from the inlet to the outlet to flow substantially along the interface wall and through gaps (G) between the interface wall and the baffle plates defining the shortest distance between the interface wall and the baffle plates,
wherein the baffle plates each have a surface on the upstream side in the flow direction which is perpendicular to the interface wall, and
wherein the lamp is an excimer lamp configured to emit radiation with a wavelength between 150 nm and 200 nm.

2. The device according to claim 1 , wherein the gaps (G) are equal to or smaller than 2.0 mm.

3. The device according to claim 1 , wherein the baffle plates have a thickness (T) parallel to the interface wall, at least in a portion adjacent to the gap (G), of less than 1.5 mm.

4. The device according to claim 1 , wherein the inter-baffle distance (D) between the upstream surfaces of two consecutive baffle plates, at least adjacent to the gap (G), is in the range from 4 to 30 mm.

5. The device according to claim 1 , wherein the number of baffle plates in the flow direction along the interface wall is at least 4.

6. The device according to claim 1 , wherein the baffle plates are interconnected with each other.

7. The device according to claim 6 , wherein the baffle plates form a self-supporting element.

8. The device according to claim 6 , wherein a seal (S) is provided between an inner peripheral wall of the container and the outer peripheral side of the baffle plates and/or an outer peripheral side of spacers.

9. The device according to claim 1 , wherein the baffle plates are integrally formed with a wall of the container.

10. The device according to claim 1 , wherein the baffle plates are formed from metal.

11. The device according to claim 1 , wherein the baffle plates are formed from plastics materials that have UV stability.

12. The device according to claim 1 , wherein the container has an outer cylinder and the interface wall of the receptacle is formed by an outer peripheral wall of an inner cylinder inserted into the volume of the outer cylinder with the baffle plates located between the outer cylinder and the inner cylinder; and
the device has at least one end cap engaged with an axial end of the outer cylinder, arranged to hold the inner cylinder in position in the outer cylinder and to fluid-tightly close the outer cylinder.

13. The device according to claim 1 , wherein the interface wall comprises or is formed from quartz glass.

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

15. The device according to claim 11 , wherein the plastics materials having UV stability is selected from the group consisting of polytetrafluorethylene, PVDF, PEEK, PFA, polyetherimide and PE.

16. The device according to claim 11 , wherein the plastic material is provided with a metallic coating.

17. The device according to claim 14 , wherein the excimer lamp is configured to emit radiation with a wavelength of 172±8 nm.

Assignees

• Merck Patent Gmbh

Inventors

• Rajagopalan Pascal
• Gross Julien
• Kano Ichiro

Classifications

• C02F2201/3223

  Single elongated lamp located on the central axis of a turbular reactor · CPC title

• C02F1/325 Primary

  Irradiation devices or lamp constructions · CPC title

• C02F2103/04

  for obtaining ultra-pure water · CPC title

• A61L2/10

  Ultraviolet [UV] radiation · CPC title

• C02F2201/328

  Having flow diverters (baffles) · CPC title