Coalescing filter element

Patent metadata

Field	Value
Publication number	US-12478909-B2
Application number	US-202318153094-A
Country	US
Kind code	B2
Filing date	Jan 11, 2023
Priority date	Mar 18, 2021
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A coalescing filter element, including an inner coalescing component configured to captured a large amount of liquid in gas, and an outer coalescing component configured to coalesce and filter a small amount of liquid remaining in the gas. The inner coalescing component and the outer coalescing component are cylindrical structures disposed in a vertical direction and opened at two ends. The outer coalescing component is sleeved on an outer side of the inner coalescing component, and an annular drainage space is formed between the inner coalescing component and the outer coalescing component. A top end cap is provided on top ends of the inner coalescing component and the outer coalescing component. A bottom end cap is provided on bottom ends of the inner coalescing component and the outer coalescing component. The bottom end cap is provided with a gas inlet communicated with an interior of the inner coalescing component.

First claim

What is claimed is:

1 . A coalescing filter element comprising:
an inner coalescing component for capturing liquid in a gas, and an outer coalescing component for coalescing and filtering the liquid remaining in the gas, wherein the inner coalescing component and the outer coalescing component are cylindrical structures disposed in a vertical direction; the outer coalescing component is sleeved on an outer side of the inner coalescing component, and an annular drainage space is formed between the inner coalescing component and the outer coalescing component; a top end cap is provided on top ends of the inner coalescing component and the outer coalescing component; a bottom end cap is provided on bottom ends of the inner coalescing component and the outer coalescing component, and the bottom end cap is provided with a gas inlet communicated with an interior of the inner coalescing component; the inner coalescing component comprises a first inner support, an inner coalescing layer, and a second inner support; the second inner support is sleeved on an outer side of the first inner support, and the inner coalescing layer is interposed between an outer surface of the first inner support and an inner surface of the second inner support; the second inner support and an upper portion of the first inner support are respectively provided with a plurality of uniformly distributed ventilation holes, and a lower portion of the first inner support is a blocking element with a cylindrical structure; the outer coalescing component comprises a first outer support, a first outer coalescing layer, a second outer support, and a first outer drainage layer; the second outer support sleeves on an outside of the first outer support, and the first outer coalescing layer is interposed between an outer surface of the first outer support and an inner surface of the second outer support; the first outer drainage layer covers an outer surface of the second outer support; the first outer support and the second outer support are respectively provided with a plurality of uniformly distributed ventilation holes; and a third outer support is disposed below the first outer support, a second outer coalescing layer is disposed below the first outer coalescing layer, a fourth outer support is disposed below the second outer support, and a second outer drainage layer is disposed below the first outer drainage layer; the fourth outer support is sleeved on an outside of the third outer support, and the second outer coalescing layer is interposed between an outer surface of the third outer support and an inner surface of the fourth outer support; the second outer drainage layer covers an outer surface of the fourth outer support.

2 . The coalescing filter element of claim 1 , wherein the inner coalescing layer comprises a first inner coalescing layer and a second inner coalescing layer which have a same wettability to a same liquid;
the second inner coalescing layer covers the outside of the first inner coalescing layer; a diameter of filter pores of the first inner coalescing layer is smaller than that of filter pores of the second inner coalescing layer.

3 . The coalescing filter element of claim 1 , wherein the first outer coalescing layer is composed of high-efficiency filter media, the first outer drainage layer is composed of amphiphobic filter media, and a pore diameter of filter pores of the first outer coalescing layer is smaller than that of filter pores of the first outer drainage layer.

4 . The coalescing filter element of claim 1 , wherein
top end surfaces of the third outer support and the fourth outer support, a top end surface of the second outer coalescing layer, and a top end surface of the second outer drainage layer are flush with a top end surface of the blocking element; bottom end surfaces of the third outer support and the fourth outer support, a bottom end surface of the second outer coalescing layer, and a bottom end surface of the second outer drainage layer are flush with a bottom end surface of the blocking element.

5 . The coalescing filter element of claim 1 , wherein the outer coalescing component further comprises a connecting member having a top end surface provided with a circular fifth positioning groove and a bottom end surface provided with a circular sixth positioning groove;
bottom portions of the first outer support and the second outer support, a bottom portion of the first outer coalescing layer, and a bottom portion of the first outer drainage layer are embedded into the fifth positioning groove; top portions of the third outer support and the fourth outer support, a top portion of the second outer coalescing layer, and a top portion of the second outer drainage layer are embedded into the sixth positioning groove.

6 . The coalescing filter element of claim 1 , wherein a bottom end surface of the top end cap is provided with an annular first positioning groove and an annular second positioning groove disposed around the first positioning groove;
a top portion of the inner coalescing component is embedded into the first positioning groove, and a top portion of the outer coalescing component is embedded into the second positioning groove.

7 . The coalescing filter element of claim 1 , wherein the gas inlet is located at a middle position of the bottom end cap;
a top end surface of the bottom end cap is provided with an annular third positioning groove and an annular fourth positioning groove disposed around the third positioning groove; a bottom portion of the inner coalescing component is embedded into the third positioning groove, and a bottom portion of the outer coalescing component is embedded into the fourth positioning groove.

8 . The coalescing filter element of claim 1 , wherein the first outer coalescing layer is composed of high-efficiency filter media, the first outer drainage layer is composed of amphiphobic filter media, and a pore diameter of filter pores of the first outer coalescing layer is smaller than that of filter pores of the first outer drainage layer.

9 . A coalescing filter element, comprising:
an inner coalescing component and an outer coalescing component, wherein the inner coalescing component and the outer coalescing component are cylindrical structures disposed in a vertical direction; the outer coalescing component is sleeved on an outer side of the inner coalescing component, and an annular drainage space is formed between the inner coalescing component and the outer coalescing component; a top end of the inner coalescing component and a top end of the outer coalescing component are closed, a bottom end of the annular drainage space is closed, and a bottom end of an interior of the inner coalescing component is provided with a gas inlet; the outer coalescing component comprises a first outer support, a first outer coalescing layer, a second outer support, and a first outer drainage layer; the second outer support sleeves on an outside of the first outer support, and the first outer coalescing layer is interposed between an outer surface of the first outer support and an inner surface of the second outer support; the first outer drainage layer covers an outer surface of the second outer support; the first outer support and the second outer support are respectively provided with a plurality of uniformly distributed ventilation holes; and a third outer support is disposed below the first outer support, a second outer coalescing layer is disposed below the first outer coalescing layer, a fourth outer support is disposed below the second outer support, and a second outer drainage layer is disposed below the first outer drainage layer; the fourth outer support is sleeved on an

Assignees

• Univ China Petroleum Beijing

Inventors

• Chang Cheng
• Ji Zhongli
• Wu Xiaolin
• Liu Zhen
• Chen Feng

Classifications

• B01D46/64

  arranged concentrically or coaxially · CPC title

• B01D2275/10

  Multiple layers · CPC title

• B01D2265/06

  Details of supporting structures for filtering material, e.g. cores · CPC title

• B01D53/266

  by filtration · CPC title

• B01D46/24

  Particle separators, e.g. dust precipitators, using rigid hollow filter bodies · CPC title