Perforated layer coalescer

Patent metadata

Field	Value
Publication number	US-11247143-B2
Application number	US-201716318488-A
Country	US
Kind code	B2
Filing date	Jul 19, 2017
Priority date	Jul 19, 2016
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

This disclosure generally relates to perforated filter media and coalescing filter elements utilizing perforated filter media. One example coalescing filter element is structured to separate a dispersed phase from a continuous phase of a mixture. The filter media includes a first coalescing layer. The first coalescing layer includes a first filter media. The first filter media has a plurality of pores and a first perforation. Each of the plurality of pores is smaller than the first perforation. The first perforation is formed in the first filter media and extends through the first filter media. The plurality of pores are structured to capture a portion of the dispersed phase. The first perforation is structured to facilitate the transmission of coalesced drops of the dispersed phase through the first coalescing layer such that the coalesced drops of the dispersed phase are separated from the portion of the dispersed phase captured in the first coalescing layer.

First claim

What is claimed is:

1. A filter media structured to separate a dispersed phase from a continuous phase of a mixture, the filter media comprising:
a first coalescing layer comprising a first filter media being unpleated and having a plurality of pores and a first perforation, each of the plurality of pores being smaller than the first perforation, the first perforation formed as a first hole in the first filter media extending through the first filter media, and
a cylindrical second filter media lacking perforations and surrounding the first coalescing layer,
wherein the plurality of pores are structured to capture a portion of the dispersed phase, and
wherein the first perforation is structured to facilitate transmission of coalesced drops of the dispersed phase through the first coalescing layer such that the coalesced drops of the dispersed phase are separated from the portion of the dispersed phase captured in the first coalescing layer.

2. The filter media of claim 1 , wherein the first filter media has a bubble point in 2-propanol of less than 1.5 inches of water.

3. The filter media of claim 1 , wherein the first filter media has a value of P that is less than 3.0×10 12 , where P is defined by the equation

P
=

d
4

⁢
D

FL

,

where:
d is a perforation diameter in microns,
D is a perforation density based on a number of occurrences of the first perforation per square meter of the first filter media,
F is a Frazier permeability of the first filter media in feet per minute, and
L is a thickness of the first filter media in mm.

4. The filter media of claim 3 , wherein the first filter media has a value of P of less than or equal to 1.5×10 12 .

5. The filter media of claim 4 , wherein the first filter media has a value of P of less than or equal to 3.0×10 11 .

6. The filter media of claim 1 , wherein the first perforation has a perforation diameter that is greater than or equal to 150 microns.

7. The filter media of claim 1 , wherein the first perforation has a perforation diameter that is greater than or equal to 200 microns.

8. The filter media of claim 7 , wherein the perforation diameter is greater than or equal to 500 microns.

9. The filter media of claim 8 , wherein the perforation diameter is greater than or equal to 1000 microns.

10. The filter media of claim 1 , wherein the first perforation has a perforation diameter that is at least three times a mean flow pore size of the first coalescing layer.

11. The filter media of claim 10 , wherein the perforation diameter is at least five times the mean flow pore size of the first coalescing layer.

12. The filter media of claim 11 , wherein the perforation diameter is at least ten times the mean flow pore size of the first coalescing layer.

13. The filter media of claim 1 , wherein the first filter media comprises a second perforation and a third perforation,
wherein each of the plurality of pores is smaller than the second perforation, the second perforation formed as a second hole in the first filter media extending through the first filter media,
wherein each of the plurality of pores is smaller than the third perforation, the third perforation formed as a third hole in the first filter media extending through the first filter media,
wherein the second perforation is structured to facilitate transmission of the coalesced drops of the dispersed phase through the first coalescing layer such that the coalesced drops of the dispersed phase are separated from the portion of the dispersed phase captured in the first coalescing layer, and
wherein the third perforation is structured to facilitate transmission of the coalesced drops of the dispersed phase through the first coalescing layer such that the coalesced drops of the dispersed phase are separated from the portion of the dispersed phase captured in the first coalescing layer.

14. The filter media of claim 13 , wherein a linear distance between the first perforation and at least one of the second perforation or the third perforation is less than or equal to fifty millimeters.

15. The filter media of claim 13 , wherein the first filter media has a perforation density of occurrences of the first perforation, the second perforation, and the third perforation of greater than 625 occurrences per square meter of the first filter media.

16. The filter media of claim 13 , wherein the first perforation, the second perforation, and the third perforation are evenly distributed across the first filter media.

17. The filter media of claim 13 , wherein the first perforation, the second perforation, and the third perforation are arranged in a row at a bottom portion of the first filter media with respect to a direction of gravity.

18. The filter media of claim 13 , wherein the first perforation, the second perforation, and the third perforation are arranged in a row at a top portion of the first filter media with respect to a direction of gravity.

19. The filter media of claim 1 , wherein the first perforation comprises a shape formed in the first filter media.

20. The filter media of claim 1 , wherein the first filter media further comprises a second perforation, the second perforation being a different size than the first perforation.

21. The filter media of claim 1 , further comprising a second coalescing layer comprising a third filter media arranged either upstream of the first coalescing layer or downstream of the first coalescing layer.

22. The filter media of claim 21 , wherein the second coalescing layer comprises a second perforation.

23. The filter media of claim 21 , wherein the first coalescing layer and the second coalescing layer are separated by a gap.

24. The filter media of claim 23 , wherein the gap is between 0 and 5000 microns.

25. The filter media of claim 1 , wherein the first filter media is cylindrical.

26. The filter media of claim 25 , wherein the first perforation is formed on a circumferential surface of the first filter media.

27. The filter media of claim 1 , wherein the first filter media has a hypothetical Reynolds number of less than 6000, wherein the hypothetical Reynolds number is defined by the equation

R
H

=

k
⁢

⁢
ρ
⁢

⁢
V

μπ
⁢

⁢
dD

,

where:
k is a consta

Assignees

• Cummins Filtration Ip Inc

Inventors

• Wieczorek Mark T
• Hendrixson Joshua Ryan
• Verdegan Barry Mark

Classifications

• B01D17/08

  Thickening liquid suspensions by filtration · CPC title

• B01D2257/702

  Hydrocarbons · CPC title

• B01D2201/291

  End caps · CPC title

• B01D29/58

  arranged concentrically or coaxially · CPC title

• B01D17/02

  Separation of non-miscible liquids · CPC title